Module: RbReadline

Included in:
Readline
Defined in:
lib/rbreadline.rb

Constant Summary collapse

RL_LIBRARY_VERSION = 
"5.2"
RL_READLINE_VERSION = 
0x0502
RB_READLINE_VERSION = 
"0.2.0.1"
EOF = 
"\xFF"
ESC = 
"\C-["
PAGE = 
"\C-L"
SPACE = 
"\x20"
RETURN = 
"\C-M"
ABORT_CHAR = 
"\C-G"
TAB = 
"\t"
RUBOUT = 
"x7f"
NEWLINE = 
"\n"
DEFAULT_BUFFER_SIZE = 
256
DEFAULT_MAX_KILLS = 
10
MB_FIND_NONZERO = 
1
MB_FIND_ANY = 
0
MB_LEN_MAX = 
4
DEFAULT_INPUTRC = 
"~/.inputrc"
SYS_INPUTRC = 
"/etc/inputrc"
UpCase = 
1
DownCase = 
2
CapCase = 
3
EVENT_NOT_FOUND =

Possible history errors passed to hist_error.

0
BAD_WORD_SPEC = 
1
SUBST_FAILED = 
2
BAD_MODIFIER = 
3
NO_PREV_SUBST = 
4
ANCHORED_SEARCH =

Possible definitions for history starting point specification.

1
NON_ANCHORED_SEARCH = 
0
HISTORY_APPEND =

Possible definitions for what style of writing the history file we want.

0
HISTORY_OVERWRITE = 
1
READERR =

Input error; can be returned by (*rl_getc_function) if readline is reading

a top-level command (RL_ISSTATE (RL_STATE_READCMD)).

0xFE.chr
RL_PROMPT_START_IGNORE =

Definitions available for use by readline clients.

1.chr
RL_PROMPT_END_IGNORE = 
2.chr
NO_MATCH =

Possible values for do_replace argument to rl_filename_quoting_function,

called by rl_complete_internal.

0
SINGLE_MATCH = 
1
MULT_MATCH = 
2
NUM_SAWMINUS =

Callback data for reading numeric arguments

0x01
NUM_SAWDIGITS = 
0x02
NUM_READONE = 
0x04
KSEQ_DISPATCHED =

A context for reading key sequences longer than a single character when

using the callback interface.

0x01
KSEQ_SUBSEQ = 
0x02
KSEQ_RECURSIVE = 
0x04
RL_STATE_NONE =

Possible state values for rl_readline_state

0x000000
RL_STATE_INITIALIZING =

no state before first call

0x000001
RL_STATE_INITIALIZED =

initializing

0x000002
RL_STATE_TERMPREPPED =

initialization done

0x000004
RL_STATE_READCMD =

terminal is prepped

0x000008
RL_STATE_METANEXT =

reading a command key

0x000010
RL_STATE_DISPATCHING =

reading input after ESC

0x000020
RL_STATE_MOREINPUT =

dispatching to a command

0x000040
RL_STATE_ISEARCH =

reading more input in a command function

0x000080
RL_STATE_NSEARCH =

doing incremental search

0x000100
RL_STATE_SEARCH =

doing non-inc search

0x000200
RL_STATE_NUMERICARG =

doing a history search

0x000400
RL_STATE_MACROINPUT =

reading numeric argument

0x000800
RL_STATE_MACRODEF =

getting input from a macro

0x001000
RL_STATE_OVERWRITE =

defining keyboard macro

0x002000
RL_STATE_COMPLETING =

overwrite mode

0x004000
RL_STATE_SIGHANDLER =

doing completion

0x008000
RL_STATE_UNDOING =

in readline sighandler

0x010000
RL_STATE_INPUTPENDING =

doing an undo

0x020000
RL_STATE_TTYCSAVED =

rl_execute_next called

0x040000
RL_STATE_CALLBACK =

tty special chars saved

0x080000
RL_STATE_VIMOTION =

using the callback interface

0x100000
RL_STATE_MULTIKEY =

reading vi motion arg

0x200000
RL_STATE_VICMDONCE =

reading multiple-key command

0x400000
RL_STATE_DONE =

entered vi command mode at least once

0x800000
NO_BELL =

done accepted line

0
AUDIBLE_BELL = 
1
VISIBLE_BELL = 
2
FTO =

Definitions used when searching the line for characters. NOTE: it is necessary that opposite directions are inverses

1
BTO =

forward to

-1     # backward to
FFIND =

backward to

2
BFIND =

forward find

-2     # backward find
RL_QF_SINGLE_QUOTE =

Possible values for the found_quote flags word used by the completion

functions.  It says what kind of (shell-like) quoting we found anywhere
in the line.

0x01
RL_QF_DOUBLE_QUOTE = 
0x02
RL_QF_BACKSLASH = 
0x04
RL_QF_OTHER_QUOTE = 
0x08
KEYMAP_SIZE = 
257
ANYOTHERKEY = 
KEYMAP_SIZE-1
RL_IM_INSERT = 
1
RL_IM_OVERWRITE = 
0
RL_IM_DEFAULT = 
RL_IM_INSERT
ISFUNC = 
0
ISKMAP = 
1
ISMACR = 
2
HISTORY_WORD_DELIMITERS = 
" \t\n;&()|<>"
HISTORY_QUOTE_CHARACTERS = 
"\"'`"
RL_SEARCH_ISEARCH =

incremental search

0x01
RL_SEARCH_NSEARCH =

non-incremental search

0x02
RL_SEARCH_CSEARCH =

intra-line char search

0x04
SF_REVERSE =

search flags

0x01
SF_FOUND = 
0x02
SF_FAILED = 
0x04
XOK = 
1

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Attribute Details

#history_base=(value) ⇒ Object

Sets the attribute history_base

Parameters:

  • value —

    the value to set the attribute history_base to.



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# File 'lib/rbreadline.rb', line 1097

def history_base=(value)
  @history_base = value
end

#history_length=(value) ⇒ Object

Sets the attribute history_length

Parameters:

  • value —

    the value to set the attribute history_length to.



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# File 'lib/rbreadline.rb', line 1097

def history_length=(value)
  @history_length = value
end

Class Method Details

.__rl_fix_point(x) ⇒ Object

Fix up point so that it is within the line boundaries after killing

text.  If FIX_MARK_TOO is non-zero, the mark is forced within line
boundaries also.



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# File 'lib/rbreadline.rb', line 4844

def __rl_fix_point(x)
   if (x > @rl_end)
      @rl_end
   elsif (x < 0)
      0
   else
      x
   end
end

._rl_abort_internal ⇒ Object

How to abort things.



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# File 'lib/rbreadline.rb', line 4649

def _rl_abort_internal()
   rl_ding()
   rl_clear_message()
   _rl_reset_argument()
   rl_clear_pending_input()

   rl_unsetstate(RL_STATE_MACRODEF)

   @rl_last_func = nil
   #throw :readline_top_level
   send(@rl_redisplay_function)
   @_rl_want_redisplay = false
   0
end

._rl_adjust_point(string, point) ⇒ Object

adjust pointed byte and find mbstate of the point of string.

adjusted point will be point <= adjusted_point, and returns
differences of the byte(adjusted_point - point).
if point is invalied (point < 0 || more than string length),
it returns -1



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# File 'lib/rbreadline.rb', line 8401

def _rl_adjust_point(string, point)

   length = string.length
   return -1 if (point < 0)
   return -1 if (length < point)

   pos = 0

   case @encoding
   when 'E'
      pos = string.scan(/./me).inject(0){|r,x| r<point ? r += x.length : r }
   when 'S'
      pos = string.scan(/./ms).inject(0){|r,x| r<point ? r += x.length : r }
   when 'U'
      pos = string.scan(/./mu).inject(0){|r,x| r<point ? r += x.length : r }
   when 'X'
      pos = string.dup.force_encoding(@encoding_name).chars.inject(0){|r,x| r<point ? r += x.bytesize : r }
   else
      pos = point
   end
   pos - point
end

._rl_any_typein ⇒ Object 



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# File 'lib/rbreadline.rb', line 5414

def _rl_any_typein()
   return (@push_index != @pop_index)
end

._rl_arg_dispatch(cxt, c) ⇒ Object

Process C as part of the current numeric argument. Return -1 if the

argument should be aborted, 0 if we should not read any more chars, and
1 if we should continue to read chars.



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# File 'lib/rbreadline.rb', line 7596

def _rl_arg_dispatch(cxt, c)
   key = c

   # If we see a key bound to `universal-argument' after seeing digits,
   #    it ends the argument but is otherwise ignored.
   if (@_rl_keymap[c] == :rl_universal_argument)
      if ((cxt & NUM_SAWDIGITS) == 0)
         @rl_numeric_arg *= 4
         return 1
      elsif (rl_isstate(RL_STATE_CALLBACK))
         @_rl_argcxt |= NUM_READONE
         return 0 # XXX
      else
         rl_setstate(RL_STATE_MOREINPUT)
         key = rl_read_key()
         rl_unsetstate(RL_STATE_MOREINPUT)
         rl_restore_prompt()
         rl_clear_message()
         rl_unsetstate(RL_STATE_NUMERICARG)
         return (_rl_dispatch(key, @_rl_keymap))
      end
   end

   #c = (c[0].ord & ~0x80).chr
   r = c[1,1]
   if (r>='0' && r<='9')
      r = r.to_i
      @rl_numeric_arg = @rl_explicit_arg ? (@rl_numeric_arg * 10) +  r : r
      @rl_explicit_arg = 1
      @_rl_argcxt |= NUM_SAWDIGITS
   elsif (c == '-' && !@rl_explicit_arg)
      @rl_numeric_arg = 1
      @_rl_argcxt |= NUM_SAWMINUS
      @rl_arg_sign = -1
   else
      # Make M-- command equivalent to M--1 command.
      if ((@_rl_argcxt & NUM_SAWMINUS)!=0 && @rl_numeric_arg == 1 && !@rl_explicit_arg)
         @rl_explicit_arg = 1
      end
      rl_restore_prompt()
      rl_clear_message()
      rl_unsetstate(RL_STATE_NUMERICARG)

      r = _rl_dispatch(key, @_rl_keymap)
      if (rl_isstate(RL_STATE_CALLBACK))
         # At worst, this will cause an extra redisplay.  Otherwise,
         #   we have to wait until the next character comes in.
         if (!@rl_done)
            send(@rl_redisplay_function)
         end
         r = 0
      end
      return r
   end
   1
end

._rl_arg_getchar ⇒ Object 



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# File 'lib/rbreadline.rb', line 7585

def _rl_arg_getchar()
   rl_message("(arg: #{@rl_arg_sign * @rl_numeric_arg}) ")
   rl_setstate(RL_STATE_MOREINPUT)
   c = rl_read_key()
   rl_unsetstate(RL_STATE_MOREINPUT)
   c
end

._rl_arg_init ⇒ Object 



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# File 'lib/rbreadline.rb', line 7579

def _rl_arg_init()
   rl_save_prompt()
   @_rl_argcxt = 0
   rl_setstate(RL_STATE_NUMERICARG)
end

._rl_arg_overflow ⇒ Object 



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# File 'lib/rbreadline.rb', line 7653

def _rl_arg_overflow()
   if (@rl_numeric_arg > 1000000)
      @_rl_argcxt = 0
      @rl_explicit_arg = @rl_numeric_arg = 0
      rl_ding()
      rl_restore_prompt()
      rl_clear_message()
      rl_unsetstate(RL_STATE_NUMERICARG)
      return 1
   end
   0
end

._rl_backspace(count) ⇒ Object

Move the cursor back.



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# File 'lib/rbreadline.rb', line 4534

def _rl_backspace(count)
   if (@_rl_term_backspace)
      @_rl_out_stream.write(@_rl_term_backspace * count)
   else
      @_rl_out_stream.write("\b"*count)
   end
   0
end

._rl_bind_tty_special_chars(kmap) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6827

def _rl_bind_tty_special_chars(kmap)
   kmap[@_rl_tty_chars.t_erase] = :rl_rubout
   kmap[@_rl_tty_chars.t_kill] = :rl_unix_line_discard
   kmap[@_rl_tty_chars.t_werase] = :rl_unix_word_rubout
   kmap[@_rl_tty_chars.t_lnext] = :rl_quoted_insert
end

._rl_char_search(count, fdir, bdir) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7430

def _rl_char_search(count, fdir, bdir)
   mbchar = ''
   mb_len = _rl_read_mbchar(mbchar, MB_LEN_MAX)

   if (count < 0)
      return (_rl_char_search_internal(-count, bdir, mbchar, mb_len))
   else
      return (_rl_char_search_internal(count, fdir, mbchar, mb_len))
   end
end

._rl_char_search_internal(count, dir, smbchar, len) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7403

def _rl_char_search_internal(count, dir, smbchar, len)
   pos = @rl_point
   inc = (dir < 0) ? -1 : 1
   while (count!=0)
      if ((dir < 0 && pos <= 0) || (dir > 0 && pos >= @rl_end))
         rl_ding()
         return -1
      end
      pos = (inc > 0) ? _rl_find_next_mbchar(@rl_line_buffer, pos, 1, MB_FIND_ANY) :
      _rl_find_prev_mbchar(@rl_line_buffer, pos, MB_FIND_ANY)
      begin
         if (_rl_is_mbchar_matched(@rl_line_buffer, pos, @rl_end, smbchar, len)!=0)
            count-=1
            if (dir < 0)
               @rl_point = (dir == BTO) ? pos+1 : pos
            else
               @rl_point = (dir == FTO) ? pos-1 : pos
            end
            break
         end
         prepos = pos
      end while ((dir < 0) ? (pos = _rl_find_prev_mbchar(@rl_line_buffer, pos, MB_FIND_ANY)) != prepos :
      (pos = _rl_find_next_mbchar(@rl_line_buffer, pos, 1, MB_FIND_ANY)) != prepos)
   end
   0
end

._rl_char_value(buf, ind) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5056

def _rl_char_value(buf,ind)
   buf[ind,1]
end

._rl_clean_up_for_exit ⇒ Object 



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# File 'lib/rbreadline.rb', line 1500

def _rl_clean_up_for_exit()
   if @readline_echoing_p
      _rl_move_vert(@_rl_vis_botlin)
      @_rl_vis_botlin = 0
      @rl_outstream.flush
      rl_restart_output(1, 0)
   end
end

._rl_clear_screen ⇒ Object 



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# File 'lib/rbreadline.rb', line 4525

def _rl_clear_screen()
   if (@_rl_term_clrpag)
      @rl_outstream.write(@_rl_tirberm_clrpag)
   else
      rl_crlf()
   end
end

._rl_clear_to_eol(count) ⇒ Object

Clear to the end of the line. COUNT is the minimum

number of character spaces to clear,



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# File 'lib/rbreadline.rb', line 4502

def _rl_clear_to_eol(count)
   if (@_rl_term_clreol)
      @rl_outstream.write(@_rl_term_clreol)
   elsif (count!=0)
      space_to_eol(count)
   end
end

._rl_col_width(string, start, _end) ⇒ Object 



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# File 'lib/rbreadline.rb', line 3764

def _rl_col_width(string,start,_end)
   return 0 if _end <= start

   index = string.index(0.chr)
   str = index ? string[0,index] : string
   width = 0

   case @encoding
   when 'N'
      return (_end - start)
   when 'U'
      str[start ... _end].scan(/./mu).each {|s| width += s.unpack('U').first >= 0x1000 ? 2 : 1 }
   when 'S'
      str[start ... _end].scan(/./ms).each {|s| width += s.length }
   when 'E'
      str[start ... _end].scan(/./me).each {|s| width += s.length }
   when 'X'
      str[start ... _end].force_encoding(@encoding_name).codepoints.each {|s| width += s > 0x1000 ? 2 : 1 }
   end
   width
end

._rl_compare_chars(buf1, pos1, buf2, pos2) ⇒ Object

compare the specified two characters. If the characters matched,

return true. Otherwise return false.



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# File 'lib/rbreadline.rb', line 8486

def _rl_compare_chars(buf1, pos1, buf2, pos2)
   return false if buf1[pos1].nil? || buf2[pos2].nil?
   case @encoding
   when 'E'
      buf1[pos1..-1].scan(/./me)[0] == buf2[pos2..-1].scan(/./me)[0]
   when 'S'
      buf1[pos1..-1].scan(/./ms)[0] == buf2[pos2..-1].scan(/./ms)[0]
   when 'U'
      buf1[pos1..-1].scan(/./mu)[0] == buf2[pos2..-1].scan(/./mu)[0]
   when 'X'
      buf1[pos1..-1].force_encoding(@encoding_name)[0] == buf2[pos2..-1].force_encoding(@encoding_name)[0]
   else
      buf1[pos1] == buf2[pos2]
   end
end

._rl_control_keypad(on) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6858

def _rl_control_keypad(on)
   if on && @_rl_term_ks
      @_rl_out_stream.write(@_rl_term_ks)
   elsif !on && @_rl_term_ke
      @_rl_out_stream.write(@_rl_term_ke)
   end
end

._rl_copy_to_kill_ring(text, append) ⇒ Object

Add TEXT to the kill ring, allocating a new kill ring slot as necessary.

This uses TEXT directly, so the caller must not free it.  If APPEND is
non-zero, and the last command was a kill, the text is appended to the
current kill ring slot, otherwise prepended.



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# File 'lib/rbreadline.rb', line 5784

def _rl_copy_to_kill_ring(text, append)
   # First, find the slot to work with.
   if (!@_rl_last_command_was_kill)
      # Get a new slot.
      if @rl_kill_ring.nil?
         # If we don't have any defined, then make one.
         @rl_kill_ring_length = 1
         @rl_kill_ring = Array.new(@rl_kill_ring_length+1)
         @rl_kill_ring[slot = 0] = nil
      else
         # We have to add a new slot on the end, unless we have
         #   exceeded the max limit for remembering kills.
         slot = @rl_kill_ring_length
         if (slot == @rl_max_kills)
            @rl_kill_ring[0,slot] = @rl_kill_ring[1,slot]
         else
            slot = @rl_kill_ring_length += 1
         end
         @rl_kill_ring[slot-=1] = nil
      end
   else
      slot = @rl_kill_ring_length - 1
   end

   # If the last command was a kill, prepend or append.
   if (@_rl_last_command_was_kill && @rl_editing_mode != @vi_mode)
      old = @rl_kill_ring[slot]

      if (append)
         new = old + text
      else
         new = text + old
      end
      old = nil
      text = nil
      @rl_kill_ring[slot] = new
   else
      @rl_kill_ring[slot] = text
   end

   @rl_kill_index = slot
   0
end

._rl_current_display_line ⇒ Object

return the ‘current display line’ of the cursor – the number of lines to

move up to get to the first screen line of the current readline line.



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# File 'lib/rbreadline.rb', line 5170

def _rl_current_display_line()
   # Find out whether or not there might be invisible characters in the
   #   editing buffer.
   if (@rl_display_prompt == @rl_prompt)
      nleft = @_rl_last_c_pos - @_rl_screenwidth - @rl_visible_prompt_length
   else
      nleft = @_rl_last_c_pos - @_rl_screenwidth
   end

   if (nleft > 0)
      ret = 1 + nleft / @_rl_screenwidth
   else
      ret = 0
   end

   ret
end

._rl_dispatch(key, map) ⇒ Object

Do the command associated with KEY in MAP.

If the associated command is really a keymap, then read
another key, and dispatch into that map.



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# File 'lib/rbreadline.rb', line 4219

def _rl_dispatch(key, map)
   @_rl_dispatching_keymap = map
   return _rl_dispatch_subseq(key, map, false)
end

._rl_dispatch_subseq(key, map, got_subseq) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4225

def _rl_dispatch_subseq(key, map, got_subseq)
   func = map[key]
   if (func)
      @rl_executing_keymap = map

      @rl_dispatching = true
      rl_setstate(RL_STATE_DISPATCHING)
      send(map[key],@rl_numeric_arg * @rl_arg_sign, key)
      rl_unsetstate(RL_STATE_DISPATCHING)
      @rl_dispatching = false
      if (@rl_pending_input == 0 && map[key] != :rl_digit_argument)
         @rl_last_func = map[key]
      end
   else
      if(map.keys.detect{|x| x =~ /^#{Regexp.escape(key)}/})
         key += _rl_subseq_getchar(key)
         return _rl_dispatch_subseq(key,map,got_subseq)
      elsif(key.length>1 && key[1] < ?\x7F)
         _rl_abort_internal()
         return -1
      else
         @rl_dispatching = true
         rl_setstate(RL_STATE_DISPATCHING)
         send(:rl_insert,@rl_numeric_arg * @rl_arg_sign, key)
         rl_unsetstate(RL_STATE_DISPATCHING)
         @rl_dispatching = false
      end
   end
   0
end

._rl_enable_meta_key ⇒ Object 



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# File 'lib/rbreadline.rb', line 2405

def _rl_enable_meta_key()
   if(@term_has_meta && @_rl_term_mm)
      @_rl_out_stream.write(@_rl_term_mm)
   end
end

._rl_erase_at_end_of_line(l) ⇒ Object

Quick redisplay hack when erasing characters at the end of the line.



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# File 'lib/rbreadline.rb', line 5712

def _rl_erase_at_end_of_line(l)
   _rl_backspace(l)
   @rl_outstream.write(' '*l)
   _rl_backspace(l)
   @_rl_last_c_pos -= l
   @visible_line[@_rl_last_c_pos,l] = 0.chr * l
   @rl_display_fixed = true if !@rl_display_fixed
end

._rl_erase_entire_line ⇒ Object 



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# File 'lib/rbreadline.rb', line 4560

def _rl_erase_entire_line()
   cr()
   _rl_clear_to_eol(0)
   cr()
   @rl_outstream.flush
end

._rl_find_completion_word ⇒ Object 



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# File 'lib/rbreadline.rb', line 6040

def _rl_find_completion_word()
   _end = @rl_point
   found_quote = 0
   delimiter = 0.chr
   quote_char = 0.chr

   brkchars = nil
   if @rl_completion_word_break_hook
      brkchars = send(@rl_completion_word_break_hook)
   end
   if brkchars.nil?
      brkchars = @rl_completer_word_break_characters
   end
   if (@rl_completer_quote_characters)
      # We have a list of characters which can be used in pairs to
      # quote substrings for the completer.  Try to find the start
      # of an unclosed quoted substring.
      # FOUND_QUOTE is set so we know what kind of quotes we found.
      scan = 0
      pass_next = false
      while scan < _end
         if (pass_next)
            pass_next = false
            next
         end

         # Shell-like semantics for single quotes -- don't allow backslash
         #   to quote anything in single quotes, especially not the closing
         #   quote.  If you don't like this, take out the check on the value
         #   of quote_char.
         if (quote_char != "'" && @rl_line_buffer[scan] == ?\\)
            pass_next = true
            found_quote |= RL_QF_BACKSLASH
            next
         end

         if (quote_char != 0.chr)
            # Ignore everything until the matching close quote char.
            if (@rl_line_buffer[scan,1] == quote_char)
               # Found matching close.  Abandon this substring.
               quote_char = 0.chr
               @rl_point = _end
            end

         elsif (@rl_completer_quote_characters.include?(@rl_line_buffer[scan,1]))

            # Found start of a quoted substring.
            quote_char = @rl_line_buffer[scan,1]
            @rl_point = scan + 1
            # Shell-like quoting conventions.
            if (quote_char == "'")
               found_quote |= RL_QF_SINGLE_QUOTE
            elsif (quote_char == '"')
               found_quote |= RL_QF_DOUBLE_QUOTE
            else
               found_quote |= RL_QF_OTHER_QUOTE
            end
         end
         if !@rl_byte_oriented
            scan = _rl_find_next_mbchar(@rl_line_buffer, scan, 1, MB_FIND_ANY)
         else
            scan += 1
         end
      end
   end

   if (@rl_point == _end && quote_char == 0.chr)

      # We didn't find an unclosed quoted substring upon which to do
      #   completion, so use the word break characters to find the
      #   substring on which to complete.


      while (@rl_point =  !@rl_byte_oriented ?
         _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_ANY):(@rl_point-1))>0

         scan = @rl_line_buffer[@rl_point,1]
         if !brkchars.include?(scan)
            next
         end
         # Call the application-specific function to tell us whether
        #   this word break character is quoted and should be skipped.
         if (@rl_char_is_quoted_p && found_quote!=0 &&
            send(@rl_char_is_quoted_p,@rl_line_buffer, @rl_point))
            next
         end

         # Convoluted code, but it avoids an n^2 algorithm with calls
         #   to char_is_quoted.
         break
      end
   end

   # If we are at an unquoted word break, then advance past it.
   scan = @rl_line_buffer[@rl_point,1]

   # If there is an application-specific function to say whether or not
   #   a character is quoted and we found a quote character, let that
   #   function decide whether or not a character is a word break, even
   #   if it is found in rl_completer_word_break_characters.  Don't bother
   #   if we're at the end of the line, though.
   if (scan != 0.chr)
      if (@rl_char_is_quoted_p)
         isbrk = (found_quote == 0 ||
         !send(@rl_char_is_quoted_p,@rl_line_buffer, @rl_point)) &&
         brkchars.include?(scan)
      else
         isbrk = brkchars.include?(scan)
      end

      if (isbrk)
         # If the character that caused the word break was a quoting
         #   character, then remember it as the delimiter.
         if (@rl_basic_quote_characters &&
            @rl_basic_quote_characters.include?(scan) &&
            (_end - @rl_point) > 1)
            delimiter = scan
         end

         # If the character isn't needed to determine something special
         #   about what kind of completion to perform, then advance past it.
         if (@rl_special_prefixes.nil? || !@rl_special_prefixes.include?(scan) )
            @rl_point+=1
         end
      end
   end

   return [quote_char,found_quote!=0,delimiter]
end

._rl_find_next_mbchar(string, seed, count, flags) ⇒ Object

Find next ‘count’ characters started byte point of the specified seed.

If flags is MB_FIND_NONZERO, we look for non-zero-width multibyte
characters.



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# File 'lib/rbreadline.rb', line 8427

def _rl_find_next_mbchar(string, seed, count, flags)
   if @encoding == 'N'
      return (seed + count)
   end
   seed = 0 if seed < 0
   return seed if count <= 0

   point = seed + _rl_adjust_point(string,seed)
   if (seed < point)
      count -= 1
   end

   case @encoding
   when 'E'
      point += string[point..-1].scan(/./me)[0,count].to_s.length
   when 'S'
      point += string[point..-1].scan(/./ms)[0,count].to_s.length
   when 'U'
      point += string[point..-1].scan(/./mu)[0,count].to_s.length
   when 'X'
      point += string[point..-1].force_encoding(@encoding_name)[0,count].bytesize
   else
      point += count
   end
   if flags == MB_FIND_NONZERO
      point = string.length if point>=string.length
   end
   point
end

._rl_find_prev_mbchar(string, seed, flags) ⇒ Object

Find previous character started byte point of the specified seed.

Returned point will be point <= seed.  If flags is MB_FIND_NONZERO,
we look for non-zero-width multibyte characters.



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# File 'lib/rbreadline.rb', line 8460

def _rl_find_prev_mbchar(string, seed, flags)
   if @encoding == 'N'
      return ((seed == 0) ? seed : seed - 1)
   end

   length = string.length
   if seed < 0
      return 0
   elsif length < seed
      return length
   end

   case @encoding
   when 'E'
      string[0,seed].scan(/./me)[0..-2].to_s.length
   when 'S'
      string[0,seed].scan(/./ms)[0..-2].to_s.length
   when 'U'
      string[0,seed].scan(/./mu)[0..-2].to_s.length
   when 'X'
      string[0,seed].force_encoding(@encoding_name)[0..-2].bytesize
   end
end

._rl_fix_point(fix_mark_too) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4854

def _rl_fix_point(fix_mark_too)
   @rl_point = __rl_fix_point(@rl_point)
   if (fix_mark_too)
      @rl_mark = __rl_fix_point(@rl_mark)
   end
end

._rl_get_char_len(src) ⇒ Object

return the number of bytes parsed from the multibyte sequence starting at src, if a non-L’0‘ wide character was recognized. It returns 0, if a L’0‘ wide character was recognized. It returns (size_t)(-1), if an invalid multibyte sequence was encountered. It returns (size_t)(-2) if it couldn’t parse a complete multibyte character.



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# File 'lib/rbreadline.rb', line 8507

def _rl_get_char_len(src)
   return 0 if src[0] == ?\0 || src.length==0
   case @encoding
   when 'E'
      len = src.scan(/./me)[0].to_s.length
   when 'S'
      len = src.scan(/./ms)[0].to_s.length
   when 'U'
      len = src.scan(/./mu)[0].to_s.length
   when 'X'
      src = src.dup.force_encoding(@encoding_name)
      len = src.valid_encoding? ? src[0].bytesize : 0
   else
      len = 1
   end
   len==0 ? -2 : len
end

._rl_get_screen_size(tty, ignore_env) ⇒ Object

Get readline’s idea of the screen size. TTY is a file descriptor open

to the terminal.  If IGNORE_ENV is true, we do not pay attention to the
values of $LINES and $COLUMNS.  The tests for TERM_STRING_BUFFER being
non-null serve to check whether or not we have initialized termcap.



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# File 'lib/rbreadline.rb', line 1840

def _rl_get_screen_size(tty, ignore_env)

   if @hConsoleHandle
      csbi = 0.chr * 24
      @GetConsoleScreenBufferInfo.Call(@hConsoleHandle,csbi)
      wc,wr = csbi[0,4].unpack('SS')
      # wr,wc, = `mode con`.scan(/\d+\n/).map{|x| x.to_i}
      @_rl_screenwidth = wc
      @_rl_screenheight = wr
   else
      wr,wc = `stty size`.split(' ').map{|x| x.to_i}
      @_rl_screenwidth = wc
      @_rl_screenheight = wr
      if ignore_env==0 && ENV['LINES']
         @_rl_screenheight = ENV['LINES'].to_i
      end
      if ignore_env==0 && ENV['COLUMNS']
         @_rl_screenwidth = ENV['COLUMNS'].to_i
      end
   end

   # If all else fails, default to 80x24 terminal.
   if @_rl_screenwidth.nil? || @_rl_screenwidth <= 1
      @_rl_screenwidth = 80
   end
   if @_rl_screenheight.nil? || @_rl_screenheight <= 0
      @_rl_screenheight = 24
   end
   # If we're being compiled as part of bash, set the environment
   #   variables $LINES and $COLUMNS to new values.  Otherwise, just
   #   do a pair of putenv () or setenv () calls.
   sh_set_lines_and_columns(@_rl_screenheight, @_rl_screenwidth)

   if !@_rl_term_autowrap
      @_rl_screenwidth-=1
   end
   @_rl_screenchars = @_rl_screenwidth * @_rl_screenheight
end

._rl_history_set_point ⇒ Object 



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# File 'lib/rbreadline.rb', line 5348

def _rl_history_set_point ()
   @rl_point = (@_rl_history_preserve_point && @_rl_history_saved_point != -1) ?
   @_rl_history_saved_point : @rl_end
   if (@rl_point > @rl_end)
      @rl_point = @rl_end
   end
   if (@rl_editing_mode == @vi_mode && @_rl_keymap != @vi_insertion_keymap)
      @rl_point = 0
   end
   if (@rl_editing_mode == @emacs_mode)
      @rl_mark = (@rl_point == @rl_end ? 0 : @rl_end)
   end
end

._rl_init_eightbit ⇒ Object 



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# File 'lib/rbreadline.rb', line 2060

def _rl_init_eightbit()

end

._rl_init_line_state ⇒ Object 



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# File 'lib/rbreadline.rb', line 2525

def _rl_init_line_state()
   @rl_point = @rl_end = @rl_mark = 0
   @rl_line_buffer = 0.chr * @rl_line_buffer.length
end

._rl_init_terminal_io(terminal_name) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1949

def _rl_init_terminal_io(terminal_name)
   term = terminal_name ? terminal_name : ENV["TERM"]
   @_rl_term_clrpag = @_rl_term_cr = @_rl_term_clreol = nil
   tty = @rl_instream ? @rl_instream.fileno : 0

   if no_terminal?
      term = "dumb"
      @_rl_bind_stty_chars = false
   end

   @term_string_buffer ||= 0.chr * 2032

   @term_buffer ||= 0.chr * 4080

   buffer = @term_string_buffer

   tgetent_ret = (term != "dumb") ? 1 : -1

   if (tgetent_ret <= 0)
      buffer = @term_buffer = @term_string_buffer = nil

      @_rl_term_autowrap = false    # used by _rl_get_screen_size

      # Allow calling application to set default height and width, using
      #rl_set_screen_size
      if (@_rl_screenwidth <= 0 || @_rl_screenheight <= 0)
         _rl_get_screen_size(tty, 0)
      end

      # Defaults.
      if (@_rl_screenwidth <= 0 || @_rl_screenheight <= 0)
         @_rl_screenwidth = 79
         @_rl_screenheight = 24
      end

      # Everything below here is used by the redisplay code (tputs).
      @_rl_screenchars = @_rl_screenwidth * @_rl_screenheight
      @_rl_term_cr = "\r"
      @_rl_term_im = @_rl_term_ei = @_rl_term_ic = @_rl_term_IC = nil
      @_rl_term_up = @_rl_term_dc = @_rl_term_DC = @_rl_visible_bell = nil
      @_rl_term_ku = @_rl_term_kd = @_rl_term_kl = @_rl_term_kr = nil
      @_rl_term_kh = @_rl_term_kH = @_rl_term_kI = @_rl_term_kD = nil
      @_rl_term_ks = @_rl_term_ke = @_rl_term_at7 = nil
      @_rl_term_mm = @_rl_term_mo = nil
      @_rl_term_ve = @_rl_term_vs = nil
      @_rl_term_forward_char = nil
      @_rl_terminal_can_insert = @term_has_meta = false

      # Reasonable defaults for tgoto().  Readline currently only uses
      #   tgoto if _rl_term_IC or _rl_term_DC is defined, but just in case we
      #   change that later...
      @_rl_term_backspace = "\b"

      return 0
   end

   get_term_capabilities(buffer)

   @_rl_term_cr ||= "\r"
   @_rl_term_autowrap = !!(tgetflag("am") && tgetflag("xn"))

   # Allow calling application to set default height and width, using
   #   rl_set_screen_size
   if (@_rl_screenwidth <= 0 || @_rl_screenheight <= 0)
      _rl_get_screen_size(tty, 0)
   end

   # "An application program can assume that the terminal can do
   #    character insertion if *any one of* the capabilities `IC',
   #    `im', `ic' or `ip' is provided."  But we can't do anything if
   #    only `ip' is provided, so...
   @_rl_terminal_can_insert = !!(@_rl_term_IC || @_rl_term_im || @_rl_term_ic)

   # Check to see if this terminal has a meta key and clear the capability
   #   variables if there is none.
   @term_has_meta = !!(tgetflag("km") || tgetflag("MT"))
   if !@term_has_meta
      @_rl_term_mm = @_rl_term_mo = nil
   end

   # Attempt to find and bind the arrow keys.  Do not override already
   #   bound keys in an overzealous attempt, however.

   bind_termcap_arrow_keys(@emacs_standard_keymap)

   bind_termcap_arrow_keys(@vi_movement_keymap)
   bind_termcap_arrow_keys(@vi_insertion_keymap)

   return 0
end

._rl_insert_char(count, c) ⇒ Object

Insert the character C at the current location, moving point forward.

If C introduces a multibyte sequence, we read the whole sequence and
then insert the multibyte char into the line buffer.



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# File 'lib/rbreadline.rb', line 5434

def _rl_insert_char(count, c)
   return 0 if (count <= 0)

   incoming = ''

   if @rl_byte_oriented
      incoming << c
      incoming_length = 1
   else
      @pending_bytes << c
      if _rl_get_char_len(@pending_bytes) == -2
         return 1
      else
         incoming = @pending_bytes
         @pending_bytes = ''
         incoming_length = incoming.length
      end
   end

   if(count>1)
      string = incoming * count
      rl_insert_text(string)
      string = nil
      return 0
   end

   if @rl_byte_oriented
      # We are inserting a single character.
      #If there is pending input, then make a string of all of the
      #pending characters that are bound to rl_insert, and insert
      #them all.
      if (_rl_any_typein())
         _rl_insert_typein(c)
      else
         rl_insert_text(c)
      end
   else
      rl_insert_text(incoming)
   end

   return 0
end

._rl_insert_next(count) ⇒ Object

Insert the next typed character verbatim.



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# File 'lib/rbreadline.rb', line 5512

def _rl_insert_next(count)
   rl_setstate(RL_STATE_MOREINPUT)
   c = rl_read_key()
   rl_unsetstate(RL_STATE_MOREINPUT)

   _rl_insert_char(count, c)
end

._rl_insert_typein(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5418

def _rl_insert_typein(c)
   string = c

   while ((key = rl_get_char()) &&
      @_rl_keymap[key] == :rl_insert)
      string << key
   end
   if (key)
      _rl_unget_char(key)
   end
   rl_insert_text(string)
end

._rl_internal_char_cleanup ⇒ Object 



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# File 'lib/rbreadline.rb', line 4567

def _rl_internal_char_cleanup()
   # In vi mode, when you exit insert mode, the cursor moves back
   #   over the previous character.  We explicitly check for that here.
   if (@rl_editing_mode == @vi_mode && @_rl_keymap == @vi_movement_keymap)
      rl_vi_check()
   end

   if (@rl_num_chars_to_read!=0 && @rl_end >= @rl_num_chars_to_read)
      send(@rl_redisplay_function)
      @_rl_want_redisplay = false
      rl_newline(1, "\n")
   end

   if (!@rl_done)
      send(@rl_redisplay_function)
      @_rl_want_redisplay = false
   end

   # If the application writer has told us to erase the entire line if
   #   the only character typed was something bound to rl_newline, do so.
   if (@rl_erase_empty_line && @rl_done && @rl_last_func == :rl_newline &&
      @rl_point == 0 && @rl_end == 0)
      _rl_erase_entire_line()
   end
end

._rl_internal_pager(lines) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6389

def _rl_internal_pager(lines)
   @rl_outstream.puts "--More--"
   @rl_outstream.flush
   i = get_y_or_n(1)
   _rl_erase_entire_line()
   if (i == 0)
      return -1
   elsif (i == 2)
      return (lines - 1)
   else
      return 0
   end
end

._rl_is_mbchar_matched(string, seed, _end, mbchar, length) ⇒ Object 



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# File 'lib/rbreadline.rb', line 8567

def _rl_is_mbchar_matched(string, seed, _end, mbchar, length)
   return 0 if ((_end - seed) < length)

   for i in 0 ... length
      if (string[seed + i] != mbchar[i])
         return 0
      end
   end
   1
end

._rl_isearch_cleanup(cxt, r) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4204

def _rl_isearch_cleanup(cxt, r)
   if (r >= 0)
      _rl_isearch_fini(cxt)
   end
   ctx = nil
   @_rl_iscxt = nil

   rl_unsetstate(RL_STATE_ISEARCH)

   r != 0
end

._rl_isearch_dispatch(cxt, c) ⇒ Object

Process just-read character C according to isearch context CXT. Return

-1 if the caller should just free the context and return, 0 if we should
break out of the loop, and 1 if we should continue to read characters.



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# File 'lib/rbreadline.rb', line 3931

def _rl_isearch_dispatch(cxt, c)
   f = nil

   # Translate the keys we do something with to opcodes.
   if (c && @_rl_keymap[c])
      f = @_rl_keymap[c]
      if (f == :rl_reverse_search_history)
         cxt.lastc = (cxt.sflags & SF_REVERSE)!=0 ? -1 : -2
      elsif (f == :rl_forward_search_history)
         cxt.lastc = (cxt.sflags & SF_REVERSE)!=0 ? -2 : -1
      elsif (f == :rl_rubout)
         cxt.lastc = -3
      elsif (c == "\C-G")
         cxt.lastc = -4
      elsif (c == "\C-W")  # XXX
         cxt.lastc = -5
      elsif (c == "\C-Y")  # XXX
         cxt.lastc = -6
      end
   end

   # The characters in isearch_terminators (set from the user-settable
   #   variable isearch-terminators) are used to terminate the search but
   #   not subsequently execute the character as a command.  The default
   #   value is "\033\012" (ESC and C-J).
   if (cxt.search_terminators.include?(cxt.lastc))
      # ESC still terminates the search, but if there is pending
      #input or if input arrives within 0.1 seconds (on systems
      #with select(2)) it is used as a prefix character
      #with rl_execute_next.  WATCH OUT FOR THIS!  This is intended
      #to allow the arrow keys to be used like ^F and ^B are used
      #to terminate the search and execute the movement command.
      #XXX - since _rl_input_available depends on the application-
      #settable keyboard timeout value, this could alternatively
      #use _rl_input_queued(100000)
      if (cxt.lastc == ESC && _rl_input_available())
         rl_execute_next(ESC)
      end
      return (0)
   end

   if !@rl_byte_oriented
      if (cxt.lastc.class == String && (cxt.mb.length == 1) && endsrch_char(cxt.lastc))
         # This sets rl_pending_input to c; it will be picked up the next
         #   time rl_read_key is called.
         rl_execute_next(cxt.lastc)
         return (0)
      end
   elsif (cxt.lastc.class == String && endsrch_char(cxt.lastc))
      # This sets rl_pending_input to LASTC; it will be picked up the next
      #   time rl_read_key is called.
      rl_execute_next(cxt.lastc)
      return (0)
   end

   # Now dispatch on the character.  `Opcodes' affect the search string or
   #   state.  Other characters are added to the string.
   case (cxt.lastc)

      # search again
   when -1
      if (cxt.search_string_index == 0)
         if (last_isearch_string)
            cxt.search_string_size = 64 + last_isearch_string_len
            cxt.search_string = last_isearch_string.dup
            cxt.search_string_index = last_isearch_string_len
            rl_display_search(cxt.search_string, (cxt.sflags & SF_REVERSE)!=0, -1)
         else
            return (1)
         end
      elsif (cxt.sflags & SF_REVERSE)!=0
         cxt.sline_index-=1
      elsif (cxt.sline_index != cxt.sline_len)
         cxt.sline_index+=1
      else
         rl_ding()
      end

      # switch directions
   when -2
      cxt.direction = -cxt.direction
      if (cxt.direction < 0)
         cxt.sflags |= SF_REVERSE
      else
         cxt.sflags &= ~SF_REVERSE
      end
      # delete character from search string.
   when -3  # C-H, DEL
      # This is tricky.  To do this right, we need to keep a
      # stack of search positions for the current search, with
      # sentinels marking the beginning and end.  But this will
      # do until we have a real isearch-undo.
      if (cxt.search_string_index == 0)
         rl_ding()
      else
         cxt.search_string[cxt.search_string_index-=1] = 0.chr
      end
   when -4  # C-G, abort
      rl_replace_line(cxt.lines[cxt.save_line], false)
      @rl_point = cxt.save_point
      @rl_mark = cxt.save_mark
      rl_restore_prompt()
      rl_clear_message()
      return -1
   when -5  # C-W
      # skip over portion of line we already matched and yank word
      wstart = @rl_point + cxt.search_string_index
      if (wstart >= @rl_end)
         rl_ding()
      else
         # if not in a word, move to one.
         cval = _rl_char_value(@rl_line_buffer, wstart)
         if (!_rl_walphabetic(cval))
            rl_ding()
         else
            if !@rl_byte_oriented
               n = _rl_find_next_mbchar(@rl_line_buffer, wstart, 1, MB_FIND_NONZERO)
            else
               n = wstart+1
            end
            while (n < @rl_end)
               cval = _rl_char_value(@rl_line_buffer, n)
               break if !_rl_walphabetic(cval)
               if !@rl_byte_oriented
                  n = _rl_find_next_mbchar(@rl_line_buffer, n, 1, MB_FIND_NONZERO)
               else
                  n = n+1
               end
            end
            wlen = n - wstart + 1
            if (cxt.search_string_index + wlen + 1 >= cxt.search_string_size)
               cxt.search_string_size += wlen + 1
            end
            cxt.search_string[cxt.search_string_index..-1] = @rl_line_buffer[wstart,wlen]
            cxt.search_string_index += wlen
         end
      end

   when -6  # C-Y
      # skip over portion of line we already matched and yank rest
      wstart = @rl_point + cxt.search_string_index
      if (wstart >= @rl_end)
         rl_ding()
      else
         n = @rl_end - wstart + 1
         if (cxt.search_string_index + n + 1 >= cxt.search_string_size)
            cxt.search_string_size += n + 1
         end
         cxt.search_string[cxt.search_string_index..-1] = @rl_line_buffer[wstart,n]
      end

      # Add character to search string and continue search.
   else
      if (cxt.search_string_index + 2 >= cxt.search_string_size)
         cxt.search_string_size += 128
      end
      if !@rl_byte_oriented
         for j in 0 ... cxt.mb.length
            cxt.search_string << cxt.mb[j,1]
            cxt.search_string_index += 1
         end
      else
         cxt.search_string << c
         cxt.search_string_index += 1
      end
   end

   while (cxt.sflags &= ~(SF_FOUND|SF_FAILED))!=0
      limit = cxt.sline_len - cxt.search_string_index + 1
      # Search the current line.
      while ((cxt.sflags & SF_REVERSE)!=0 ? (cxt.sline_index >= 0) : (cxt.sline_index < limit))

         if (cxt.search_string[0,cxt.search_string_index] == cxt.sline[cxt.sline_index,cxt.search_string_index])
            cxt.sflags |= SF_FOUND
            break
         else
            cxt.sline_index += cxt.direction
         end
      end
      break if (cxt.sflags & SF_FOUND)!=0

      # Move to the next line, but skip new copies of the line
      # we just found and lines shorter than the string we're
      # searching for.
      begin
         # Move to the next line.
         cxt.history_pos += cxt.direction

         # At limit for direction?
         if ((cxt.sflags & SF_REVERSE)!=0 ? (cxt.history_pos < 0) : (cxt.history_pos == cxt.hlen))
            cxt.sflags |= SF_FAILED
            break
         end

         # We will need these later.
         cxt.sline = cxt.lines[cxt.history_pos]
         cxt.sline_len = cxt.sline.length
      end while ((cxt.prev_line_found && cxt.prev_line_found == cxt.lines[cxt.history_pos]) ||
      (cxt.search_string_index > cxt.sline_len))

      break if (cxt.sflags & SF_FAILED)!=0

      # Now set up the line for searching...
      cxt.sline_index = (cxt.sflags & SF_REVERSE)!=0 ? cxt.sline_len - cxt.search_string_index : 0
   end

   if (cxt.sflags & SF_FAILED)!=0
      # We cannot find the search string.  Ding the bell.
      rl_ding()
      cxt.history_pos = cxt.last_found_line
      return 1
   end

   # We have found the search string.  Just display it.  But don't
   #   actually move there in the history list until the user accepts
   #   the location.
   if (cxt.sflags & SF_FOUND)!=0
      cxt.prev_line_found = cxt.lines[cxt.history_pos]
      rl_replace_line(cxt.lines[cxt.history_pos], false)
      @rl_point = cxt.sline_index
      cxt.last_found_line = cxt.history_pos
      rl_display_search(cxt.search_string, (cxt.sflags & SF_REVERSE)!=0, (cxt.history_pos == cxt.save_line) ? -1 : cxt.history_pos)
   end
   1
end

._rl_isearch_fini(cxt) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4168

def _rl_isearch_fini(cxt)
   # First put back the original state.
   @rl_line_buffer = cxt.lines[cxt.save_line].dup
   rl_restore_prompt()

   # Save the search string for possible later use.
   @last_isearch_string = cxt.search_string
   @last_isearch_string_len = cxt.search_string_index
   cxt.search_string = nil

   if (cxt.last_found_line < cxt.save_line)
      rl_get_previous_history(cxt.save_line - cxt.last_found_line, 0)
   else
      rl_get_next_history(cxt.last_found_line - cxt.save_line, 0)
   end

   # If the string was not found, put point at the end of the last matching
   #   line.  If last_found_line == orig_line, we didn't find any matching
   #   history lines at all, so put point back in its original position.
   if (cxt.sline_index < 0)

      if (cxt.last_found_line == cxt.save_line)
         cxt.sline_index = cxt.save_point
      else
         cxt.sline_index = @rl_line_buffer.delete(0.chr).length
      end
      @rl_mark = cxt.save_mark
   end

   @rl_point = cxt.sline_index
   # Don't worry about where to put the mark here; rl_get_previous_history
   #   and rl_get_next_history take care of it.
   rl_clear_message()
end

._rl_isearch_init(direction) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7096

def _rl_isearch_init(direction)
   cxt = _rl_scxt_alloc(RL_SEARCH_ISEARCH, 0)
   if (direction < 0)
      cxt.sflags |= SF_REVERSE
   end

   cxt.search_terminators = @_rl_isearch_terminators ? @_rl_isearch_terminators :
   @default_isearch_terminators

   # Create an arrary of pointers to the lines that we want to search.
   hlist = history_list()
   rl_maybe_replace_line()
   i = 0
   if (hlist)
      i += 1 while(hlist[i])
   end

   # Allocate space for this many lines, +1 for the current input line,
   #   and remember those lines.
   cxt.hlen = i
   cxt.lines = Array.new(cxt.hlen+1)
   for i in 0 ... cxt.hlen
      cxt.lines[i] = hlist[i].line
   end

   if (@_rl_saved_line_for_history)
      cxt.lines[i] = @_rl_saved_line_for_history.line.dup
   else
      # Keep track of this so we can free it.
      cxt.allocated_line = @rl_line_buffer.dup
      cxt.lines[i] = cxt.allocated_line
   end

   cxt.hlen+=1

   # The line where we start the search.
   cxt.history_pos = cxt.save_line

   rl_save_prompt()

   # Initialize search parameters.
   cxt.search_string_size = 128
   cxt.search_string_index = 0
   cxt.search_string = 0.chr * cxt.search_string_size

   # Normalize DIRECTION into 1 or -1.
   cxt.direction = (direction >= 0) ? 1 : -1

   cxt.sline = @rl_line_buffer
   cxt.sline_len = cxt.sline.delete(0.chr).length
   cxt.sline_index = @rl_point

   @_rl_iscxt = cxt     # save globally
   cxt
end

._rl_make_prompt_for_search(pchar) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7956

def _rl_make_prompt_for_search(pchar)
   rl_save_prompt()

   # We've saved the prompt, and can do anything with the various prompt
   #   strings we need before they're restored.  We want the unexpanded
   #   portion of the prompt string after any final newline.
   _p = @rl_prompt ? @rl_prompt.rindex("\n") : nil
   if _p.nil?
      len = (@rl_prompt && @rl_prompt.length>0 ) ? @rl_prompt.length : 0
      if (len>0)
         pmt = @rl_prompt.dup
      else
         pmt = ''
      end
      pmt << pchar
   else
      _p+=1
      pmt = @rl_prompt[_p..-1]
      pmt << pchar
   end

   # will be overwritten by expand_prompt, called from rl_message
   @prompt_physical_chars = @saved_physical_chars + 1
   pmt
end

._rl_move_cursor_relative(new, data, start = 0) ⇒ Object

Move the cursor from _rl_last_c_pos to NEW, which are buffer indices.

(Well, when we don't have multibyte characters, _rl_last_c_pos is a
buffer index.)
DATA is the contents of the screen line of interest; i.e., where
the movement is being done.



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# File 'lib/rbreadline.rb', line 1514

def _rl_move_cursor_relative(new, data, start=0)

   woff = w_offset(@_rl_last_v_pos, @wrap_offset)
   cpos = @_rl_last_c_pos

   if !@rl_byte_oriented
      dpos = _rl_col_width(data, start, start+new)

      if (dpos > @prompt_last_invisible)     # XXX - don't use woff here
         dpos -= woff
         # Since this will be assigned to _rl_last_c_pos at the end (more
         #   precisely, _rl_last_c_pos == dpos when this function returns),
         #   let the caller know.
         @cpos_adjusted = true
      end
   else
      dpos = new
   end
   # If we don't have to do anything, then return.
   if (cpos == dpos)
      return
   end

   if @hConsoleHandle
      csbi = 0.chr * 24
      @GetConsoleScreenBufferInfo.Call(@hConsoleHandle,csbi)
      x,y = csbi[4,4].unpack('SS')
      x = dpos
      @SetConsoleCursorPosition.Call(@hConsoleHandle,y*65536+x)
      @_rl_last_c_pos = dpos
      return
   end

   # It may be faster to output a CR, and then move forwards instead
   #   of moving backwards.
   # i == current physical cursor position.
   if !@rl_byte_oriented
      i = @_rl_last_c_pos
   else
      i = @_rl_last_c_pos - woff
   end

   if (dpos == 0 || cr_faster(dpos, @_rl_last_c_pos) ||
      (@_rl_term_autowrap && i == @_rl_screenwidth))
      @rl_outstream.write(@_rl_term_cr)
      cpos = @_rl_last_c_pos = 0
   end

   if (cpos < dpos)
      # Move the cursor forward.  We do it by printing the command
      # to move the cursor forward if there is one, else print that
      # portion of the output buffer again.  Which is cheaper?

      # The above comment is left here for posterity.  It is faster
      # to print one character (non-control) than to print a control
      # sequence telling the terminal to move forward one character.
      # That kind of control is for people who don't know what the
      # data is underneath the cursor.

      # However, we need a handle on where the current display position is
      # in the buffer for the immediately preceding comment to be true.
      # In multibyte locales, we don't currently have that info available.
      # Without it, we don't know where the data we have to display begins
      # in the buffer and we have to go back to the beginning of the screen
      # line.  In this case, we can use the terminal sequence to move forward
      # if it's available.
      if !@rl_byte_oriented
         if (@_rl_term_forward_char)
            @rl_outstream.write(@_rl_term_forward_char * (dpos-cpos))
         else
            @rl_outstream.write(@_rl_term_cr)
            @rl_outstream.write(data[start,new])
         end
      else
         @rl_outstream.write(data[start+cpos,new-cpos])
      end
   elsif (cpos > dpos)
      _rl_backspace(cpos - dpos)
   end
   @_rl_last_c_pos = dpos
end

._rl_move_vert(to) ⇒ Object

PWP: move the cursor up or down.



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# File 'lib/rbreadline.rb', line 1598

def _rl_move_vert(to)
   if (@_rl_last_v_pos == to || to > @_rl_screenheight)
      return
   end

   if ((delta = to - @_rl_last_v_pos) > 0)
      @rl_outstream.write("\n"*delta)
      @rl_outstream.write("\r")
      @_rl_last_c_pos = 0
   else
      if(@_rl_term_up)
         @rl_outstream.write(@_rl_term_up*(-delta))
      end
   end
   @_rl_last_v_pos = to        # Now TO is here
end

._rl_nsearch_abort(cxt) ⇒ Object 



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# File 'lib/rbreadline.rb', line 8015

def _rl_nsearch_abort(cxt)
   rl_maybe_unsave_line()
   rl_clear_message()
   @rl_point = cxt.save_point
   @rl_mark = cxt.save_mark
   rl_restore_prompt()
   rl_unsetstate(RL_STATE_NSEARCH)
end

._rl_nsearch_cleanup(cxt, r) ⇒ Object 



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# File 'lib/rbreadline.rb', line 8008

def _rl_nsearch_cleanup(cxt, r)
   cxt = nil
   @_rl_nscxt = nil
   rl_unsetstate(RL_STATE_NSEARCH)
   r != 1
end

._rl_nsearch_dispatch(cxt, c) ⇒ Object

Process just-read character C according to search context CXT. Return -1

if the caller should abort the search, 0 if we should break out of the
loop, and 1 if we should continue to read characters.



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# File 'lib/rbreadline.rb', line 8027

def _rl_nsearch_dispatch(cxt, c)
   case (c)
   when "\C-W"
      rl_unix_word_rubout(1, c)
   when "\C-W"
      rl_unix_line_discard(1, c)
   when RETURN,NEWLINE
      return 0
   when "\C-H",RUBOUT
      if (@rl_point == 0)
         _rl_nsearch_abort(cxt)
         return -1
      end
      _rl_rubout_char(1, c)
   when "\C-C","\C-G"
      rl_ding()
      _rl_nsearch_abort(cxt)
      return -1
   else
      if !@rl_byte_oriented
         rl_insert_text(cxt.mb)
      else
         _rl_insert_char(1, c)
      end
   end

   send(@rl_redisplay_function)
   1
end

._rl_nsearch_dosearch(cxt) ⇒ Object

Perform one search according to CXT, using NONINC_SEARCH_STRING. Return

-1 if the search should be aborted, any other value means to clean up
using _rl_nsearch_cleanup ().  Returns 1 if the search was successful,
0 otherwise.



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# File 'lib/rbreadline.rb', line 8061

def _rl_nsearch_dosearch(cxt)
   @rl_mark = cxt.save_mark

   # If rl_point == 0, we want to re-use the previous search string and
   #   start from the saved history position.  If there's no previous search
   #   string, punt.
   if (@rl_point == 0)
      if @noninc_search_string.nil?
         rl_ding()
         rl_restore_prompt()
         rl_unsetstate(RL_STATE_NSEARCH)
         return -1
      end
   else
      # We want to start the search from the current history position.
      @noninc_history_pos = cxt.save_line
      @noninc_search_string = @rl_line_buffer.dup

      # If we don't want the subsequent undo list generated by the search
      #matching a history line to include the contents of the search string,
      #we need to clear rl_line_buffer here.  For now, we just clear the
      #undo list generated by reading the search string.  (If the search
      #fails, the old undo list will be restored by rl_maybe_unsave_line.)
      rl_free_undo_list()
   end

   rl_restore_prompt()
   noninc_dosearch(@noninc_search_string, cxt.direction)
end

._rl_nsearch_init(dir, pchar) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7982

def _rl_nsearch_init(dir, pchar)
   cxt = _rl_scxt_alloc(RL_SEARCH_NSEARCH, 0)
   if (dir < 0)
      cxt.sflags |= SF_REVERSE      # not strictly needed
   end
   cxt.direction = dir
   cxt.history_pos = cxt.save_line
   rl_maybe_save_line()
   # Clear the undo list, since reading the search string should create its
   #   own undo list, and the whole list will end up being freed when we
   #   finish reading the search string.
   @rl_undo_list = nil

   # Use the line buffer to read the search string.
   @rl_line_buffer[0] = 0.chr
   @rl_end = @rl_point = 0

   _p = _rl_make_prompt_for_search(pchar ? pchar : ':')
   rl_message(_p)
   _p = nil

   rl_setstate(RL_STATE_NSEARCH)
   @_rl_nscxt = cxt
   cxt
end

._rl_output_some_chars(string, start, count) ⇒ Object

Write COUNT characters from STRING to the output stream.



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# File 'lib/rbreadline.rb', line 3787

def _rl_output_some_chars(string,start,count)
   @_rl_out_stream.write(string[start,count])
end

._rl_overwrite_char(count, c) ⇒ Object

Overwrite the character at point (or next COUNT characters) with C.

If C introduces a multibyte character sequence, read the entire sequence
before starting the overwrite loop.



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# File 'lib/rbreadline.rb', line 5480

def _rl_overwrite_char(count, c)

   # Read an entire multibyte character sequence to insert COUNT times.
   if (count > 0 && !@rl_byte_oriented)
      mbkey = ''
      k = _rl_read_mbstring(c, mbkey, MB_LEN_MAX)
   end
   rl_begin_undo_group()

   count.times do
      if !@rl_byte_oriented
         rl_insert_text(mbkey)
      else
         _rl_insert_char(1, c)
      end
      if (@rl_point < @rl_end)
         rl_delete(1, c)
      end
   end

   rl_end_undo_group()

   return 0
end

._rl_overwrite_rubout(count, key) ⇒ Object

This is different from what vi does, so the code’s not shared. Emacs

rubout in overwrite mode has one oddity:  it replaces a control
character that's displayed as two characters (^X) with two spaces.



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# File 'lib/rbreadline.rb', line 5660

def _rl_overwrite_rubout(count, key)
   if (@rl_point == 0)
      rl_ding()
      return 1
   end

   opoint = @rl_point

   # L == number of spaces to insert
   l = 0
   count.times do
      rl_backward_char(1, key)
      l += rl_character_len(@rl_line_buffer[@rl_point,1], @rl_point) # not exactly right
   end

   rl_begin_undo_group()

   if (count > 1 || @rl_explicit_arg)
      rl_kill_text(opoint, @rl_point)
   else
      rl_delete_text(opoint, @rl_point)
   end
   # Emacs puts point at the beginning of the sequence of spaces.
   if (@rl_point < @rl_end)
      opoint = @rl_point
      _rl_insert_char(l, ' ')
      @rl_point = opoint
   end

   rl_end_undo_group()

   0
end

._rl_read_init_file(filename, include_level) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2093

def _rl_read_init_file(filename, include_level)
   @current_readline_init_file = filename
   @current_readline_init_include_level = include_level

   openname = File.expand_path(filename)
   begin
      buffer = File.open(openname).read
   rescue
      return -1
   end

   if (include_level == 0 && filename != @last_readline_init_file)
      @last_readline_init_file = filename.dup
   end

   @currently_reading_init_file = true

   # Loop over the lines in the file.  Lines that start with `#' are
   #   comments; all other lines are commands for readline initialization.
   @current_readline_init_lineno = 1

   buffer.each_line do |line|
      line.strip!
      next if line =~ /^#/
      next if line == ''
      rl_parse_and_bind(line)
   end

   return 0
end

._rl_read_mbchar(mbchar, size) ⇒ Object

read multibyte char



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# File 'lib/rbreadline.rb', line 8526

def _rl_read_mbchar(mbchar, size)
   mb_len = 0
   while (mb_len < size)
      rl_setstate(RL_STATE_MOREINPUT)
      mbchar << rl_read_key()
      mb_len += 1
      rl_unsetstate(RL_STATE_MOREINPUT)
      case @encoding
      when 'E'
         break unless mbchar.scan(/./me).empty?
      when 'S'
         break unless mbchar.scan(/./ms).empty?
      when 'U'
         break unless mbchar.scan(/./mu).empty?
      when 'X'
         break if mbchar.dup.force_encoding(@encoding_name).valid_encoding?
      end
   end
   mb_len
end

._rl_read_mbstring(first, mb, mlen) ⇒ Object

Read a multibyte-character string whose first character is FIRST into

the buffer MB of length MLEN.  Returns the last character read, which
may be FIRST.  Used by the search functions, among others.  Very similar
to _rl_read_mbchar.



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# File 'lib/rbreadline.rb', line 8551

def _rl_read_mbstring(first, mb, mlen)
   c = first
   for i in 0 ... mlen
      mb << c
      if _rl_get_char_len(mb) == -2
         # Read more for multibyte character
         rl_setstate(RL_STATE_MOREINPUT)
         c = rl_read_key()
         rl_unsetstate(RL_STATE_MOREINPUT)
      else
         break
      end
   end
   c
end

._rl_redisplay_after_sigwinch ⇒ Object

Redisplay the current line after a SIGWINCH is received.



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# File 'lib/rbreadline.rb', line 8598

def _rl_redisplay_after_sigwinch()
   # Clear the current line and put the cursor at column 0.  Make sure
   #   the right thing happens if we have wrapped to a new screen line.
   if @_rl_term_cr
      @rl_outstream.write(@_rl_term_cr)
      @_rl_last_c_pos = 0
      if @_rl_term_clreol
         @rl_outstream.write(@_rl_term_clreol)
      else
         space_to_eol(@_rl_screenwidth)
         @rl_outstream.write(@_rl_term_cr)
      end

      if @_rl_last_v_pos > 0
         _rl_move_vert(0)
      end
   else
      rl_crlf()
   end

   # Redraw only the last line of a multi-line prompt.
   t = @rl_display_prompt.index("\n")
   if t
      redraw_prompt(@rl_display_prompt[(t+1)..-1])
   else
      rl_forced_update_display()
   end
end

._rl_replace_text(text, start, _end) ⇒ Object

Replace the contents of the line buffer between START and END with

TEXT.  The operation is undoable.  To replace the entire line in an
undoable mode, use _rl_replace_text(text, 0, rl_end)



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# File 'lib/rbreadline.rb', line 4883

def _rl_replace_text(text, start, _end)
   rl_begin_undo_group()
   rl_delete_text(start, _end + 1)
   @rl_point = start
   n = rl_insert_text(text)
   rl_end_undo_group()
   n
end

._rl_reset_argument ⇒ Object

Create a default argument.



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# File 'lib/rbreadline.rb', line 3885

def _rl_reset_argument()
   @rl_numeric_arg = @rl_arg_sign = 1
   @rl_explicit_arg = false
   @_rl_argcxt = 0
end

._rl_rubout_char(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5721

def _rl_rubout_char(count, key)
   # Duplicated code because this is called from other parts of the library.
   if (count < 0)
      return (rl_delete(-count, key))
   end
   if (@rl_point == 0)
      rl_ding()
      return -1
   end

   orig_point = @rl_point
   if (count > 1 || @rl_explicit_arg)
      rl_backward_char(count, key)
      rl_kill_text(orig_point, @rl_point)
   elsif (@rl_byte_oriented)
      c = @rl_line_buffer[@rl_point-=1,1]
      rl_delete_text(@rl_point, orig_point)
      # The erase-at-end-of-line hack is of questionable merit now.
      if (@rl_point == @rl_end && isprint(c) && @_rl_last_c_pos!=0)
         l = rl_character_len(c, @rl_point)
         _rl_erase_at_end_of_line(l)
      end
   else
      @rl_point = _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO)
      rl_delete_text(@rl_point, orig_point)
   end

   0
end

._rl_scxt_alloc(type, flags) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7056

def _rl_scxt_alloc(type, flags)
   cxt = Struct.new(:type,:sflags,:search_string,:search_string_index,:search_string_size,:lines,:allocated_line,
   :hlen,:hindex,:save_point,:save_mark,:save_line,:last_found_line,:prev_line_found,:save_undo_list,:history_pos,
   :direction,:lastc,:sline,:sline_len,:sline_index,:search_terminators).new

   cxt.type = type
   cxt.sflags = flags

   cxt.search_string = nil
   cxt.search_string_size = cxt.search_string_index = 0

   cxt.lines = nil
   cxt.allocated_line = nil
   cxt.hlen = cxt.hindex = 0

   cxt.save_point = @rl_point
   cxt.save_mark = @rl_mark
   cxt.save_line = where_history()
   cxt.last_found_line = cxt.save_line
   cxt.prev_line_found = nil

   cxt.save_undo_list = nil

   cxt.history_pos = 0
   cxt.direction = 0

   cxt.lastc = 0

   cxt.sline = nil
   cxt.sline_len = cxt.sline_index = 0

   cxt.search_terminators = nil

   cxt
end

._rl_search_getchar(cxt) ⇒ Object 



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# File 'lib/rbreadline.rb', line 3912

def _rl_search_getchar(cxt)
   # Read a key and decide how to proceed.
   rl_setstate(RL_STATE_MOREINPUT)
   c = cxt.lastc = rl_read_key()
   rl_unsetstate(RL_STATE_MOREINPUT)
   if !@rl_byte_oriented
      cxt.mb = ""
      c = cxt.lastc = _rl_read_mbstring(cxt.lastc, cxt.mb, MB_LEN_MAX)
   end
   c
end

._rl_set_insert_mode(im, force) ⇒ Object

Function for the rest of the library to use to set insert/overwrite mode.



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# File 'lib/rbreadline.rb', line 1431

def _rl_set_insert_mode(im, force)
   @rl_insert_mode = im
end

._rl_set_mark_at_pos(position) ⇒ Object

Set the mark at POSITION.



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# File 'lib/rbreadline.rb', line 6951

def _rl_set_mark_at_pos(position)
   return -1 if (position > @rl_end)
   @rl_mark = position
   0
end

._rl_start_using_history ⇒ Object

Set the history pointer back to the last entry in the history.



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# File 'lib/rbreadline.rb', line 2531

def _rl_start_using_history()
   using_history()
   @_rl_saved_line_for_history = nil
end

._rl_strip_prompt(pmt) ⇒ Object 



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# File 'lib/rbreadline.rb', line 3760

def _rl_strip_prompt(pmt)
   return expand_prompt(pmt).first
end

._rl_subseq_getchar(key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4486

def _rl_subseq_getchar(key)
   if (key == ESC)
      rl_setstate(RL_STATE_METANEXT)
   end
   rl_setstate(RL_STATE_MOREINPUT)
   k = rl_read_key()
   rl_unsetstate(RL_STATE_MOREINPUT)
   if (key == ESC)
      rl_unsetstate(RL_STATE_METANEXT)
   end

   return k
end

._rl_to_lower(char) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1292

def _rl_to_lower(char)
   char.nil? ? nil : char.chr.downcase
end

._rl_unget_char(key) ⇒ Object

Stuff KEY into the front of the input buffer.

Returns non-zero if successful, zero if there is
no space left in the buffer.



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# File 'lib/rbreadline.rb', line 4474

def _rl_unget_char(key)
   if (ibuffer_space()!=0)
      @pop_index-=1
      if (@pop_index < 0)
         @pop_index = @ibuffer_len - 1
      end
      @ibuffer[@pop_index] = key
      return (1)
   end
   return (0)
end

._rl_update_final ⇒ Object 



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# File 'lib/rbreadline.rb', line 5582

def _rl_update_final()
   full_lines = false
   # If the cursor is the only thing on an otherwise-blank last line,
   #   compensate so we don't print an extra CRLF.
   if (@_rl_vis_botlin && @_rl_last_c_pos == 0 &&
      @visible_line[@vis_lbreaks[@_rl_vis_botlin]] == ?\0 )
      @_rl_vis_botlin-=1
      full_lines = true
   end
   _rl_move_vert(@_rl_vis_botlin)
   # If we've wrapped lines, remove the final xterm line-wrap flag.
   if (full_lines && @_rl_term_autowrap && (vis_llen(@_rl_vis_botlin) == @_rl_screenwidth))
      last_line = @visible_line[@vis_lbreaks[@_rl_vis_botlin]..-1]
      @cpos_buffer_position = -1 # don't know where we are in buffer
      _rl_move_cursor_relative(@_rl_screenwidth - 1, last_line)   # XXX
      _rl_clear_to_eol(0)
      @rl_outstream.write(last_line[@_rl_screenwidth - 1,1])
   end
   @_rl_vis_botlin = 0
   rl_crlf()
   @rl_outstream.flush
   @rl_display_fixed = true if !@rl_display_fixed
end

._rl_vi_done_inserting ⇒ Object 



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# File 'lib/rbreadline.rb', line 5542

def _rl_vi_done_inserting()
   if (@_rl_vi_doing_insert)

      # The `C', `s', and `S' commands set this.
      rl_end_undo_group()
      # Now, the text between rl_undo_list->next->start and
      # rl_undo_list->next->end is what was inserted while in insert
      # mode.  It gets copied to VI_INSERT_BUFFER because it depends
      # on absolute indices into the line which may change (though they
      # probably will not).
      @_rl_vi_doing_insert = 0
      _rl_vi_save_insert(@rl_undo_list.next)
      @vi_continued_command = 1
   else
      if ((@_rl_vi_last_key_before_insert == 'i' || @_rl_vi_last_key_before_insert == 'a') && @rl_undo_list)
         _rl_vi_save_insert(@rl_undo_list)

         # XXX - Other keys probably need to be checked.
      elsif (@_rl_vi_last_key_before_insert == 'C')
         rl_end_undo_group()
      end
      while (@_rl_undo_group_level > 0)
         rl_end_undo_group()
      end
      @vi_continued_command = 0
   end
end

._rl_vi_initialize_line ⇒ Object 



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# File 'lib/rbreadline.rb', line 3716

def _rl_vi_initialize_line
   rl_unsetstate(RL_STATE_VICMDONCE)
end

._rl_vi_reset_last ⇒ Object 



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# File 'lib/rbreadline.rb', line 5575

def _rl_vi_reset_last()
   @_rl_vi_last_command = 'i'
   @_rl_vi_last_repeat = 1
   @_rl_vi_last_arg_sign = 1
   @_rl_vi_last_motion = 0
end

._rl_vi_save_insert(up) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5529

def _rl_vi_save_insert(up)
   if (up.nil? || up.what != UNDO_INSERT)
      if (@vi_insert_buffer_size >= 1)
         @vi_insert_buffer[0] = 0.chr
      end
      return
   end
   start = up.start
   _end = up.end
   len = _end - start + 1
   @vi_insert_buffer = @rl_line_buffer[start,len-1]
end

._rl_vi_textmod_command(c) ⇒ Object

Is the command C a VI mode text modification command?



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# File 'lib/rbreadline.rb', line 5571

def _rl_vi_textmod_command(c)
   return @vi_textmod[c]
end

._rl_walphabetic(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5072

def _rl_walphabetic(c)
   rl_alphabetic(c)
end

.add_history(string) ⇒ Object

Place STRING at the end of the history list. The data field

is  set to NULL.



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# File 'lib/rbreadline.rb', line 6003

def add_history(string)
   if (@history_stifled && (@history_length == @history_max_entries))
      # If the history is stifled, and history_length is zero,
      # and it equals history_max_entries, we don't save items.
      return if (@history_length == 0)
      @the_history.shift
   else
      if @the_history.nil?
         @the_history = []
         @history_length = 1
      else
         @history_length+=1
      end
   end

   temp = alloc_history_entry(string, hist_inittime())
   @the_history[@history_length] = nil
   @the_history[@history_length - 1] = temp
end

.alloc_history_entry(string, ts) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5983

def alloc_history_entry(string, ts)
   temp = Struct.new(:line,:data,:timestamp).new
   temp.line = string ? string.delete(0.chr) : string
   temp.data = nil
   temp.timestamp = ts

   return temp
end

.alloc_undo_entry(what, start, _end, text) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4783

def alloc_undo_entry(what, start, _end, text)
   temp = Struct.new(:what,:start,:end,:text,:next).new
   temp.what = what
   temp.start = start
   temp.end = _end
   temp.text = text
   temp.next = nil
   temp
end

.append_to_match(text, delimiter, quote_char, nontrivial_match) ⇒ Object

Append any necessary closing quote and a separator character to the just-inserted match. If the user has specified that directories should be marked by a trailing ‘/’, append one of those instead. The default trailing character is a space. Returns the number of characters appended. If NONTRIVIAL_MATCH is set, we test for a symlink (if the OS has them) and don’t add a suffix for a symlink to a directory. A nontrivial match is one that actually adds to the word being completed. The variable rl_completion_mark_symlink_dirs controls this behavior (it’s initially set to the what the user has chosen, indicated by the value of _rl_complete_mark_symlink_dirs, but may be modified by an application’s completion function).



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# File 'lib/rbreadline.rb', line 8256

def append_to_match(text, delimiter, quote_char, nontrivial_match)
   temp_string = 0.chr * 4
   temp_string_index = 0
   if (quote_char && @rl_point>0 && !@rl_completion_suppress_quote &&
      @rl_line_buffer[@rl_point - 1,1] != quote_char)
      temp_string[temp_string_index] = quote_char
      temp_string_index += 1
   end
   if (delimiter != 0.chr)
      temp_string[temp_string_index] = delimiter
      temp_string_index += 1
   elsif (!@rl_completion_suppress_append && @rl_completion_append_character)
      temp_string[temp_string_index] = @rl_completion_append_character
      temp_string_index += 1
   end
   temp_string[temp_string_index] = 0.chr
   temp_string_index += 1

   if (@rl_filename_completion_desired)
      filename = File.expand_path(text)
      s = (nontrivial_match && !@rl_completion_mark_symlink_dirs) ?
      File.lstat(filename) : File.stat(filename)
      if s.directory?
         if @_rl_complete_mark_directories
            # This is clumsy.  Avoid putting in a double slash if point
            # is at the end of the line and the previous character is a
            # slash.
            if (@rl_point>0 && @rl_line_buffer[@rl_point] == ?\0 && @rl_line_buffer[@rl_point - 1] == ?/ )

            elsif (@rl_line_buffer[@rl_point] != ?/ )
               rl_insert_text("/")
            end
         end
         # Don't add anything if the filename is a symlink and resolves to a
         # directory.
      elsif s.symlink? && File.stat(filename).directory?

      else
         if (@rl_point == @rl_end && temp_string_index>0)
            rl_insert_text(temp_string)
         end
      end
      filename = nil
   else
      if (@rl_point == @rl_end && temp_string_index>0)
         rl_insert_text(temp_string)
      end
   end
   temp_string_index
end

.bind_arrow_keys ⇒ Object

Try and bind the common arrow key prefixes after giving termcap and

the inputrc file a chance to bind them and create `real' keymaps
for the arrow key prefix.



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# File 'lib/rbreadline.rb', line 2467

def bind_arrow_keys()
   bind_arrow_keys_internal(@emacs_standard_keymap)
   bind_arrow_keys_internal(@vi_movement_keymap)
   bind_arrow_keys_internal(@vi_insertion_keymap)
end

.bind_arrow_keys_internal(map) ⇒ Object

Bind some common arrow key sequences in MAP.



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# File 'lib/rbreadline.rb', line 2430

def bind_arrow_keys_internal(map)
   xkeymap = @_rl_keymap
   @_rl_keymap = map

   if RUBY_PLATFORM =~ /mswin|mingw/
      rl_bind_keyseq_if_unbound("\340H", :rl_get_previous_history) # Up
      rl_bind_keyseq_if_unbound("\340P", :rl_get_next_history) # Down
      rl_bind_keyseq_if_unbound("\340M", :rl_forward_char)  # Right
      rl_bind_keyseq_if_unbound("\340K", :rl_backward_char) # Left
      rl_bind_keyseq_if_unbound("\340G", :rl_beg_of_line)   # Home
      rl_bind_keyseq_if_unbound("\340O", :rl_end_of_line)   # End
      rl_bind_keyseq_if_unbound("\340s", :rl_backward_word) # Ctrl-Left
      rl_bind_keyseq_if_unbound("\340t", :rl_forward_word) # Ctrl-Right
      rl_bind_keyseq_if_unbound("\340S", :rl_delete) # Delete
      rl_bind_keyseq_if_unbound("\340R", :rl_overwrite_mode) # Insert
   else
      rl_bind_keyseq_if_unbound("\033[A", :rl_get_previous_history)
      rl_bind_keyseq_if_unbound("\033[B", :rl_get_next_history)
      rl_bind_keyseq_if_unbound("\033[C", :rl_forward_char)
      rl_bind_keyseq_if_unbound("\033[D", :rl_backward_char)
      rl_bind_keyseq_if_unbound("\033[H", :rl_beg_of_line)
      rl_bind_keyseq_if_unbound("\033[F", :rl_end_of_line)

      rl_bind_keyseq_if_unbound("\033OA", :rl_get_previous_history)
      rl_bind_keyseq_if_unbound("\033OB", :rl_get_next_history)
      rl_bind_keyseq_if_unbound("\033OC", :rl_forward_char)
      rl_bind_keyseq_if_unbound("\033OD", :rl_backward_char)
      rl_bind_keyseq_if_unbound("\033OH", :rl_beg_of_line)
      rl_bind_keyseq_if_unbound("\033OF", :rl_end_of_line)
   end

   @_rl_keymap = xkeymap
end

.bind_termcap_arrow_keys(map) ⇒ Object

Bind the arrow key sequences from the termcap description in MAP.



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# File 'lib/rbreadline.rb', line 1931

def bind_termcap_arrow_keys(map)
   xkeymap = @_rl_keymap
   @_rl_keymap = map

   rl_bind_keyseq_if_unbound(@_rl_term_ku, :rl_get_previous_history)
   rl_bind_keyseq_if_unbound(@_rl_term_kd, :rl_get_next_history)
   rl_bind_keyseq_if_unbound(@_rl_term_kr, :rl_forward_char)
   rl_bind_keyseq_if_unbound(@_rl_term_kl, :rl_backward_char)

   rl_bind_keyseq_if_unbound(@_rl_term_kh, :rl_beg_of_line) # Home
   rl_bind_keyseq_if_unbound(@_rl_term_at7, :rl_end_of_line)   # End

   rl_bind_keyseq_if_unbound(@_rl_term_kD, :rl_delete)
   rl_bind_keyseq_if_unbound(@_rl_term_kI, :rl_overwrite_mode)

   @_rl_keymap = xkeymap
end

.block_sigint ⇒ Object 



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# File 'lib/rbreadline.rb', line 6792

def block_sigint()
   return if @sigint_blocked
   #@sigint_proc = Signal.trap("INT","IGNORE")
   @sigint_blocked = true
end

.clear_history ⇒ Object 



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# File 'lib/rbreadline.rb', line 8336

def clear_history()
   @the_history = nil
   @history_offset = @history_length = 0
end

.compute_lcd_of_matches(match_list, matches, text) ⇒ Object

Find the common prefix of the list of matches, and put it into

matches[0].



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# File 'lib/rbreadline.rb', line 1298

def compute_lcd_of_matches(match_list, matches, text)
   # If only one match, just use that.  Otherwise, compare each
   #   member of the list with the next, finding out where they
   #   stop matching.
   if (matches == 1)
      match_list[0] = match_list[1]
      match_list[1] = nil
      return 1
   end

   i = 1
   low = 100000
   while(i<matches)
      if (@_rl_completion_case_fold)
         si = 0
         while((c1 = _rl_to_lower(match_list[i][si])) &&
            (c2 = _rl_to_lower(match_list[i + 1][si])))
            if !@rl_byte_oriented
               if(!_rl_compare_chars(match_list[i],si,match_list[i+1],si))
                  break
               elsif ((v = _rl_get_char_len(match_list[i][si..-1])) > 1)
                  si += v - 1
               end
            else
               break if (c1 != c2)
            end
            si += 1
         end
      else
         si = 0
         while((c1 = match_list[i][si]) &&
            (c2 = match_list[i + 1][si]))
            if !@rl_byte_oriented
               if(!_rl_compare_chars(match_list[i],si,match_list[i+1],si))
                  break
               elsif ((v = _rl_get_char_len(match_list[i][si..-1])) > 1)
                  si += v - 1
               end
            else
               break if (c1 != c2)
            end
            si += 1
         end
      end

      if (low > si)
         low = si
      end
      i += 1
   end

   # If there were multiple matches, but none matched up to even the
   #   first character, and the user typed something, use that as the
   #   value of matches[0].
   if (low == 0 && text && text.length>0 )
      match_list[0] = text.dup
   else
      # XXX - this might need changes in the presence of multibyte chars

      # If we are ignoring case, try to preserve the case of the string
      # the user typed in the face of multiple matches differing in case.
      if (@_rl_completion_case_fold)

         # We're making an assumption here:
         #  IF we're completing filenames AND
         #     the application has defined a filename dequoting function AND
         #     we found a quote character AND
         #     the application has requested filename quoting
         #  THEN
         #     we assume that TEXT was dequoted before checking against
         #     the file system and needs to be dequoted here before we
         #     check against the list of matches
         #  FI
         if (@rl_filename_completion_desired &&
            @rl_filename_dequoting_function &&
            @rl_completion_found_quote &&
            @rl_filename_quoting_desired)

            dtext = send(@rl_filename_dequoting_function,text, @rl_completion_quote_character)
            text = dtext
         end

         # sort the list to get consistent answers.
         match_list = [match_list[0]] + match_list[1..-1].sort

         si = text.length
         if (si <= low)
            for i in 1 .. matches
               if match_list[i][0,si] == text
                  match_list[0] = match_list[i][0,low]
                  break
               end
               # no casematch, use first entry
               if (i > matches)
                  match_list[0] = match_list[1][0,low]
               end
            end
         else
            # otherwise, just use the text the user typed.
            match_list[0] = text[0,low]
         end
      else
         match_list[0] = match_list[1][0,low]
      end
   end

   return matches
end

.cr ⇒ Object

Move to the start of the current line.



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# File 'lib/rbreadline.rb', line 4553

def cr()
   if (@_rl_term_cr)
      @_rl_out_stream.write(@_rl_term_cr)
      @_rl_last_c_pos = 0
   end
end

.cr_faster(new, cur) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2537

def cr_faster(new, cur)
   (new + 1) < (cur - new)
end

.ctrl_char(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2595

def ctrl_char(c)
   c < "\x20"
end

.current_history ⇒ Object

Return the history entry at the current position, as determined by

history_offset.  If there is no entry there, return a NULL pointer.



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# File 'lib/rbreadline.rb', line 2586

def current_history()
   return ((@history_offset == @history_length) || @the_history.nil?) ?
   nil : @the_history[@history_offset]
end

.delete_chars(count) ⇒ Object

Delete COUNT characters from the display line.



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# File 'lib/rbreadline.rb', line 8381

def delete_chars(count)
   return if (count > @_rl_screenwidth)   # XXX

   if @hConsoleHandle.nil?
      #if (@_rl_term_DC)
      #   buffer = tgoto(_rl_term_DC, count, count);
      #   @_rl_out_stream.write(buffer * count)
      #else
      if (@_rl_term_dc)
         @_rl_out_stream.write(@_rl_term_dc * count)
      end
      #end
   end
end

.display_matches(matches) ⇒ Object

Display MATCHES, a list of matching filenames in argv format. This handles the simple case – a single match – first. If there is more than one match, we compute the number of strings in the list and the length of the longest string, which will be needed by the display function. If the application wants to handle displaying the list of matches itself, it sets RL_COMPLETION_DISPLAY_MATCHES_HOOK to the address of a function, and we just call it. If we’re handling the display ourselves, we just call rl_display_match_list. We also check that the list of matches doesn’t exceed the user-settable threshold, and ask the user if he wants to see the list if there are more matches than RL_COMPLETION_QUERY_ITEMS.



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# File 'lib/rbreadline.rb', line 6572

def display_matches(matches)
   # Move to the last visible line of a possibly-multiple-line command.
   _rl_move_vert(@_rl_vis_botlin)

   # Handle simple case first.  What if there is only one answer?
   if matches[1].nil?
      temp = printable_part(matches[0])
      rl_crlf()
      print_filename(temp, matches[0])
      rl_crlf()
      rl_forced_update_display()
      @rl_display_fixed = true
      return
   end

   # There is more than one answer.  Find out how many there are,
   #   and find the maximum printed length of a single entry.
   max = 0
   i = 1
   while(matches[i])
      temp = printable_part(matches[i])
      len = fnwidth(temp)

      if (len > max)
         max = len
      end
      i += 1
   end
   len = i - 1

   # If the caller has defined a display hook, then call that now.
   if (@rl_completion_display_matches_hook)
      send(@rl_completion_display_matches_hook,matches, len, max)
      return
   end

   # If there are many items, then ask the user if she really wants to
   #   see them all.
   if (@rl_completion_query_items > 0 && len >= @rl_completion_query_items)

      rl_crlf()
      @rl_outstream.write("Display all #{len} possibilities? (y or n)")
      @rl_outstream.flush
      if (get_y_or_n(false)==0)
         rl_crlf()

         rl_forced_update_display()
         @rl_display_fixed = true

         return
      end
   end

   rl_display_match_list(matches, len, max)

   rl_forced_update_display()
   @rl_display_fixed = true
end

.endsrch_char(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 3924

def endsrch_char(c)
   ((ctrl_char(c) || meta_char(c) || (c) == RUBOUT) && ((c) != "\C-G"))
end

.expand_prompt(pmt) ⇒ Object

Current implementation:

 \001 (^A) start non-visible characters
 \002 (^B) end non-visible characters
all characters except \001 and \002 (following a \001) are copied to
the returned string all characters except those between \001 and
\002 are assumed to be `visible'.



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# File 'lib/rbreadline.rb', line 1656

def expand_prompt(pmt)
   # Short-circuit if we can.
   if (@rl_byte_oriented && pmt[RL_PROMPT_START_IGNORE].nil?)
      r = pmt.dup
      lp = r.length
      lip = 0
      niflp = 0
      vlp = lp
      return [r,lp,lip,niflp,vlp]
   end

   l = pmt.length
   ret = ''
   invfl = 0    # invisible chars in first line of prompt
   invflset = 0    # we only want to set invfl once

   igstart = 0
   rl = 0
   ignoring = false
   last = ninvis = physchars = 0
   for pi in 0 ... pmt.length
      # This code strips the invisible character string markers
      #RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE
      if (!ignoring && pmt[pi,1] == RL_PROMPT_START_IGNORE)        # XXX - check ignoring?
         ignoring = true
         igstart = pi
         next
      elsif (ignoring && pmt[pi,1] == RL_PROMPT_END_IGNORE)
         ignoring = false
         if (pi != (igstart + 1))
            last = ret.length - 1
         end
         next
      else
         if !@rl_byte_oriented
            pind = pi
            ind = _rl_find_next_mbchar(pmt, pind, 1, MB_FIND_NONZERO)
            l = ind - pind
            while (l>0)
               l-=1
               ret << pmt[pi]
               pi += 1
            end
            if (!ignoring)
               rl += ind - pind
               physchars += _rl_col_width(pmt, pind, ind)
            else
               ninvis += ind - pind
            end
            pi-=1       # compensate for later increment
         else
            ret << pmt[pi]
            if (!ignoring)
               rl+=1            # visible length byte counter
               physchars+=1
            else
               ninvis+=1        # invisible chars byte counter
            end

            if (invflset == 0 && rl >= @_rl_screenwidth)
               invfl = ninvis
               invflset = 1
            end
         end
      end
   end

   if (rl < @_rl_screenwidth)
      invfl = ninvis
   end
   lp = rl
   lip = last
   niflp = invfl
   vlp = physchars
   return [ret,lp,lip,niflp,vlp]
end

.fnprint(to_print) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6350

def fnprint(to_print)
   printed_len = 0

   case @encoding
   when 'E'
      arr = to_print.scan(/./me)
   when 'S'
      arr = to_print.scan(/./ms)
   when 'U'
      arr = to_print.scan(/./mu)
   when 'X'
      arr = to_print.dup.force_encoding(@encoding_name).chars
   else
      arr = to_print.scan(/./m)
   end

   arr.each do |s|
      if(ctrl_char(s))
         @rl_outstream.write('^'+(s[0].ord|0x40).chr.upcase)
         printed_len += 2
      elsif s == RUBOUT
         @rl_outstream.write('^?')
         printed_len += 2
      else
         @rl_outstream.write(s)
         if @encoding=='U'
            printed_len += s.unpack('U').first >= 0x1000 ? 2 : 1
         elsif @encoding=='X'
            printed_len += s.ord >= 0x1000 ? 2 : 1
         else
            printed_len += s.length
         end
      end

   end

   printed_len
end

.fnwidth(string) ⇒ Object

Compute width of STRING when displayed on screen by print_filename



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# File 'lib/rbreadline.rb', line 6522

def fnwidth(string)
   left = string.length + 1
   width = pos = 0
   while (string[pos] && string[pos] != ?\0)
      if (ctrl_char(string[0,1]) || string[0,1] == RUBOUT)
         width += 2
         pos+=1
      else
         case @encoding
         when 'E'
            wc = string[pos,left-pos].scan(/./me)[0]
            bytes = wc.length
            tempwidth = wc.length
         when 'S'
            wc = string[pos,left-pos].scan(/./ms)[0]
            bytes = wc.length
            tempwidth = wc.length
         when 'U'
            wc = string[pos,left-pos].scan(/./mu)[0]
            bytes = wc.length
            tempwidth = wc.unpack('U').first >= 0x1000 ? 2 : 1
         when 'X'
            wc = string[pos,left-pos].force_encoding(@encoding_name)[0]
            bytes = wc.bytesize
            tempwidth = wc.ord >= 0x1000 ? 2 : 1
         else
            wc = string[pos,left-pos].scan(/./m)[0]
            bytes = wc.length
            tempwidth = wc.length
         end
         clen = bytes
         pos += clen
         w = tempwidth
         width += (w >= 0) ? w : 1
      end
   end
   width
end

.gen_completion_matches(text, start, _end, our_func, found_quote, quote_char) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6170

def gen_completion_matches(text, start, _end, our_func, found_quote, quote_char)
   @rl_completion_found_quote = found_quote
   @rl_completion_quote_character = quote_char

   # If the user wants to TRY to complete, but then wants to give
   #   up and use the default completion function, they set the
   #   variable rl_attempted_completion_function.
   if (@rl_attempted_completion_function)
      matches = Readline.send(@rl_attempted_completion_function,text, start, _end)
      if (matches || @rl_attempted_completion_over)
         @rl_attempted_completion_over = false
         return (matches)
      end
   end
   # XXX -- filename dequoting moved into rl_filename_completion_function

   matches = rl_completion_matches(text, our_func)
   matches
end

.get_term_capabilities(buffer) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1794

def get_term_capabilities(buffer)
   hash = {}
   `infocmp -C`.split(':').select{|x| x =~ /(.*)=(.*)/ and hash[$1]=$2.gsub('\\E',"\e").gsub(/\^(.)/){($1[0].ord ^ ((?a..?z).include?($1[0]) ? 0x60 : 0x40)).chr}}
   @_rl_term_at7          =     hash["@7"]
   @_rl_term_DC           =     hash["DC"]
   @_rl_term_IC           =     hash["IC"]
   @_rl_term_clreol       =     hash["ce"]
   @_rl_term_clrpag       =     hash["cl"]
   @_rl_term_cr           =     hash["cr"]
   @_rl_term_dc           =     hash["dc"]
   @_rl_term_ei           =     hash["ei"]
   @_rl_term_ic           =     hash["ic"]
   @_rl_term_im           =     hash["im"]
   @_rl_term_kD           =     hash["kD"]
   @_rl_term_kH           =     hash["kH"]
   @_rl_term_kI           =     hash["kI"]
   @_rl_term_kd           =     hash["kd"]
   @_rl_term_ke           =     hash["ke"]
   @_rl_term_kh           =     hash["kh"]
   @_rl_term_kl           =     hash["kl"]
   @_rl_term_kr           =     hash["kr"]
   @_rl_term_ks           =     hash["ks"]
   @_rl_term_ku           =     hash["ku"]
   @_rl_term_backspace    =     hash["le"]
   @_rl_term_mm           =     hash["mm"]
   @_rl_term_mo           =     hash["mo"]
   @_rl_term_forward_char =     hash["nd"]
   @_rl_term_pc           =     hash["pc"]
   @_rl_term_up           =     hash["up"]
   @_rl_visible_bell      =     hash["vb"]
   @_rl_term_vs           =     hash["vs"]
   @_rl_term_ve           =     hash["ve"]
   @tcap_initialized = true
end

.get_y_or_n(for_pager) ⇒ Object

The user must press “y” or “n”. Non-zero return means “y” pressed.



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# File 'lib/rbreadline.rb', line 6495

def get_y_or_n(for_pager)
   while(true)

      rl_setstate(RL_STATE_MOREINPUT)
      c = rl_read_key()
      rl_unsetstate(RL_STATE_MOREINPUT)

      if (c == 'y' || c == 'Y' || c == ' ')
         return (1)
      end
      if (c == 'n' || c == 'N' || c == RUBOUT)
         return (0)
      end
      if (c == ABORT_CHAR)
         _rl_abort_internal()
      end
      if (for_pager && (c == NEWLINE || c == RETURN))
         return (2)
      end
      if (for_pager && (c == 'q' || c == 'Q'))
         return (0)
      end
      rl_ding()
   end
end

.handle_parser_directive(statement) ⇒ Object

Handle a parser directive. STATEMENT is the line of the directive

without any leading `$'.



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# File 'lib/rbreadline.rb', line 2213

def handle_parser_directive(statement)

   directive,args = statement.split(' ')

   case directive.downcase
   when "if"
      parser_if(args)
      return 0
   when "endif"
      parser_endif(args)
      return 0
   when "else"
      parser_else(args)
      return 0
   when "include"
      parser_include(args)
      return 0
   end

   #_rl_init_file_error("unknown parser directive")
   return 1
end

.hist_inittime ⇒ Object 



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# File 'lib/rbreadline.rb', line 5992

def hist_inittime()
   t = Time.now.to_i
   ts = "X%u" % t
   ret = ts.dup
   ret[0] = @history_comment_char

   ret
end

.history_base ⇒ Object

Returns the value of attribute history_base.



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# File 'lib/rbreadline.rb', line 1097

def history_base
  @history_base
end

.history_get(offset) ⇒ Object

Return the history entry which is logically at OFFSET in the history array.

OFFSET is relative to history_base.



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# File 'lib/rbreadline.rb', line 6759

def history_get(offset)
   local_index = offset - @history_base
   return (local_index >= @history_length || local_index < 0 || @the_history.nil?) ?
   nil : @the_history[local_index]
end

.history_is_stifled ⇒ Object 



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# File 'lib/rbreadline.rb', line 8332

def history_is_stifled()
   return (@history_stifled)
end

.history_length ⇒ Object

Returns the value of attribute history_length.



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# File 'lib/rbreadline.rb', line 1097

def history_length
  @history_length
end

.history_list ⇒ Object 



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# File 'lib/rbreadline.rb', line 7092

def history_list()
   @the_history
end

.history_search_pos(string, dir, pos) ⇒ Object

Search for STRING in the history list. DIR is < 0 for searching

backwards.  POS is an absolute index into the history list at
which point to begin searching.



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# File 'lib/rbreadline.rb', line 7884

def history_search_pos(string, dir, pos)
   old = where_history()
   history_set_pos(pos)
   if (history_search(string, dir) == -1)
      history_set_pos(old)
      return (-1)
   end
   ret = where_history()
   history_set_pos(old)
   ret
end

.history_search_prefix(string, direction) ⇒ Object

Do an anchored search for string through the history in DIRECTION.



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# File 'lib/rbreadline.rb', line 7877

def history_search_prefix (string, direction)
   history_search_internal(string, direction, ANCHORED_SEARCH)
end

.history_set_pos(pos) ⇒ Object

Make the current history item be the one at POS, an absolute index.

Returns zero if POS is out of range, else non-zero.



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# File 'lib/rbreadline.rb', line 7868

def history_set_pos(pos)
   if (pos > @history_length || pos < 0 || @the_history.nil?)
      return (0)
   end
   @history_offset = pos
   1
end

.ibuffer_space ⇒ Object

Return the amount of space available in the buffer for stuffing

characters.



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# File 'lib/rbreadline.rb', line 4446

def ibuffer_space()
   if (@pop_index > @push_index)
      return (@pop_index - @push_index - 1)
   else
      return (@ibuffer_len - (@push_index - @pop_index))
   end
end

.init_line_structures(minsize) ⇒ Object

Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated

arrays of line break markers.  MINSIZE is the minimum size of VISIBLE_LINE
and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is
increased.  If the lines have already been allocated, this ensures that
they can hold at least MINSIZE characters.



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# File 'lib/rbreadline.rb', line 2558

def init_line_structures(minsize)
   if @invisible_line.nil? # initialize it
      if (@line_size < minsize)
         @line_size = minsize
      end
      @visible_line = 0.chr * @line_size
      @invisible_line = 0.chr * @line_size # 1.chr
   elsif (@line_size < minsize)  # ensure it can hold MINSIZE chars
      @line_size *= 2
      if (@line_size < minsize)
         @line_size = minsize
      end
      @visible_line << 0.chr * (@line_size - @visible_line.length)
      @invisible_line << 1.chr * (@line_size - @invisible_line.length)
   end
   @visible_line[minsize,@line_size-minsize] = 0.chr * (@line_size-minsize)
   @invisible_line[minsize,@line_size-minsize] = 1.chr * (@line_size-minsize)

   if @vis_lbreaks.nil?
      @inv_lbreaks = []
      @vis_lbreaks = []
      @_rl_wrapped_line = []
      @inv_lbreaks[0] = @vis_lbreaks[0] = 0
   end
end

.insert_all_matches(matches, point, qc) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6238

def insert_all_matches(matches, point, qc)
   rl_begin_undo_group()
   # remove any opening quote character; make_quoted_replacement will add
   #   it back.
   if (qc && qc.length>0 && point>0 && @rl_line_buffer[point - 1,1] == qc)
      point-=1
   end
   rl_delete_text(point, @rl_point)
   @rl_point = point
   if (matches[1])
      i = 1
      while(matches[i])
         rp = make_quoted_replacement(matches[i], SINGLE_MATCH, qc)
         rl_insert_text(rp)
         rl_insert_text(" ")
         if (rp != matches[i])
            rp = nil
         end
         i += 1
      end
   else
      rp = make_quoted_replacement(matches[0], SINGLE_MATCH, qc)
      rl_insert_text(rp)
      rl_insert_text(" ")
      if (rp != matches[0])
         rp = nil
      end
   end
   rl_end_undo_group()
end

.insert_match(match, start, mtype, qc) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6309

def insert_match(match, start, mtype, qc)
   oqc = qc
   replacement = make_quoted_replacement(match, mtype, qc)

   # Now insert the match.
   if (replacement)
      # Don't double an opening quote character.
      if (qc && qc.length>0 && start!=0 && @rl_line_buffer[start - 1,1] == qc &&
         replacement[0,1] == qc)
         start-=1
         # If make_quoted_replacement changed the quoting character, remove
         # the opening quote and insert the (fully-quoted) replacement.
      elsif (qc && (qc != oqc) && start!=0 && @rl_line_buffer[start - 1,1] == oqc &&
         replacement[0,1] != oqc)
         start-=1
      end
      _rl_replace_text(replacement, start, @rl_point - 1)
      if (replacement != match)
         replacement = nil
      end
   end
end

.insert_some_chars(string, count, col) ⇒ Object

Insert COUNT characters from STRING to the output stream at column COL.



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# File 'lib/rbreadline.rb', line 8342

def insert_some_chars(string, count, col)
   if @hConsoleHandle
      _rl_output_some_chars(string,0,count)
   else
      # DEBUGGING
      if (@rl_byte_oriented)
         if (count != col)
            $stderr.write("readline: debug: insert_some_chars: count (#{count}) != col (#{col})\n");
         end
      end
      # If IC is defined, then we do not have to "enter" insert mode.
      #if (@_rl_term_IC)
      #   buffer = tgoto(@_rl_term_IC, 0, col)
      #   @_rl_out_stream.write(buffer)
      #   _rl_output_some_chars(string,0,count)
      #else
      # If we have to turn on insert-mode, then do so.
      if (@_rl_term_im)
         @_rl_out_stream.write(@_rl_term_im)
      end
      # If there is a special command for inserting characters, then
      # use that first to open up the space.
      if (@_rl_term_ic)
         @_rl_out_stream.write(@_rl_term_ic * count)
      end

      # Print the text.
      _rl_output_some_chars(string,0, count)

      # If there is a string to turn off insert mode, we had best use
      # it now.
      if (@_rl_term_ei)
         @_rl_out_stream.write(@_rl_term_ei)
      end
      #end
   end
end

.inv_line(line) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2631

def inv_line(line)
   @invisible_line[@inv_lbreaks[line] .. -1]
end

.inv_llen(l) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2615

def inv_llen(l)
   (@inv_lbreaks[l+1] - @inv_lbreaks[l])
end

.isascii(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7802

def isascii(c)
 int_val = c[0].to_i # 1.8 + 1.9 compat.
 return (int_val < 128 && int_val > 0)
end

.isprint(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2599

def isprint(c)
   c >= "\x20" && c < "\x7f"
end

.m_offset(margin, offset) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2635

def m_offset(margin, offset)
   ((margin) == 0 ? offset : 0)
end

.make_history_line_current(entry) ⇒ Object

Make the data from the history entry ENTRY be the contents of the

current line.  This doesn't do anything with rl_point; the caller
must set it.



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# File 'lib/rbreadline.rb', line 7851

def make_history_line_current(entry)
   _rl_replace_text(entry.line, 0, @rl_end)
   _rl_fix_point(1)
   if (@rl_editing_mode == @vi_mode)
      # POSIX.2 says that the `U' command doesn't affect the copy of any
      #   command lines to the edit line.  We're going to implement that by
      #   making the undo list start after the matching line is copied to the
      #   current editing buffer.
      rl_free_undo_list()
   end
   if (@_rl_saved_line_for_history)
      @_rl_saved_line_for_history = nil
   end
end

.make_quoted_replacement(match, mtype, qc) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6269

def make_quoted_replacement(match, mtype, qc)
   # If we are doing completion on quoted substrings, and any matches
   #   contain any of the completer_word_break_characters, then auto-
   #   matically prepend the substring with a quote character (just pick
   #   the first one from the list of such) if it does not already begin
   #   with a quote string.  FIXME: Need to remove any such automatically
   #   inserted quote character when it no longer is necessary, such as
   #   if we change the string we are completing on and the new set of
   #   matches don't require a quoted substring.
   replacement = match

   should_quote = match && @rl_completer_quote_characters &&
   @rl_filename_completion_desired &&
   @rl_filename_quoting_desired

   if (should_quote)
      should_quote = should_quote && (qc.nil? || qc == 0.chr ||
      (@rl_completer_quote_characters && @rl_completer_quote_characters.include?(qc)))
   end

   if (should_quote)

      # If there is a single match, see if we need to quote it.
      #   This also checks whether the common prefix of several
      # matches needs to be quoted.
      should_quote = @rl_filename_quote_characters ?
      !!match[@rl_filename_quote_characters] :
      false

      do_replace = should_quote ? mtype : NO_MATCH
      # Quote the replacement, since we found an embedded
      # word break character in a potential match.
      if (do_replace != NO_MATCH && @rl_filename_quoting_function)
         replacement = send(@rl_filename_quoting_function,match, do_replace, qc)
      end
   end
   replacement
end

.meta_char(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2591

def meta_char(c)
   c > "\x7f" && c <= "\xff"
end

.next_history ⇒ Object

Move history_offset forward to the next history entry, and return

a pointer to that entry.  If there is no next entry then return a
NULL pointer.



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# File 'lib/rbreadline.rb', line 5298

def next_history()
   (@history_offset == @history_length) ? nil : @the_history[@history_offset+=1]
end

.no_terminal? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbreadline.rb', line 8659

def no_terminal?
  term = ENV["TERM"]
  term.nil? || (term == 'dumb') || (term == 'cygwin' && RUBY_PLATFORM =~ /mswin|mingw/)
end

.noninc_dosearch(string, dir) ⇒ Object

Search for a line in the history containing STRING. If DIR is < 0, the

search is backwards through previous entries, else through subsequent
entries.  Returns 1 if the search was successful, 0 otherwise.



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# File 'lib/rbreadline.rb', line 7925

def noninc_dosearch(string, dir)
   if (string.nil? || string == '' || @noninc_history_pos < 0)
      rl_ding()
      return 0
   end

   pos = noninc_search_from_pos(string, @noninc_history_pos + dir, dir)
   if (pos == -1)
      # Search failed, current history position unchanged.
      rl_maybe_unsave_line()
      rl_clear_message()
      @rl_point = 0
      rl_ding()
      return 0
   end

   @noninc_history_pos = pos

   oldpos = where_history()
   history_set_pos(@noninc_history_pos)
   entry = current_history()
   if (@rl_editing_mode != @vi_mode)
      history_set_pos(oldpos)
   end
   make_history_line_current(entry)
   @rl_point = 0
   @rl_mark = @rl_end
   rl_clear_message()
   1
end

.noninc_search(dir, pchar) ⇒ Object

Search non-interactively through the history list. DIR < 0 means to

search backwards through the history of previous commands; otherwise
the search is for commands subsequent to the current position in the
history list.  PCHAR is the character to use for prompting when reading
the search string; if not specified (0), it defaults to `:'.



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# File 'lib/rbreadline.rb', line 7812

def noninc_search(dir, pchar)
   cxt = _rl_nsearch_init(dir, pchar)
   if (rl_isstate(RL_STATE_CALLBACK))
      return (0)
   end
   # Read the search string.
   r = 0
   while (true)
      c = _rl_search_getchar(cxt)
      if (c == 0.chr)
         break
      end
      r = _rl_nsearch_dispatch(cxt, c)
      if (r < 0)
         return 1
      elsif (r == 0)
         break
      end
   end

   r = _rl_nsearch_dosearch(cxt)
   (r >= 0) ? _rl_nsearch_cleanup(cxt, r) : (r != 1)
end

.noninc_search_from_pos(string, pos, dir) ⇒ Object

Search the history list for STRING starting at absolute history position

POS.  If STRING begins with `^', the search must match STRING at the
beginning of a history line, otherwise a full substring match is performed
for STRING.  DIR < 0 means to search backwards through the history list,
DIR >= 0 means to search forward.



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# File 'lib/rbreadline.rb', line 7901

def noninc_search_from_pos(string, pos, dir)
   return 1 if (pos < 0)

   old = where_history()
   return -1 if (history_set_pos(pos) == 0)

   rl_setstate(RL_STATE_SEARCH)
   if (string[0,1] == '^')
      ret = history_search_prefix(string + 1, dir)
   else
      ret = history_search(string, dir)
   end
   rl_unsetstate(RL_STATE_SEARCH)

   if (ret != -1)
      ret = where_history()
   end
   history_set_pos(old)
   ret
end

.parser_else(args) ⇒ Object

Invert the current parser state if there is anything on the stack.



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# File 'lib/rbreadline.rb', line 2169

def parser_else(args)
   if @if_stack.empty?
      #_rl_init_file_error ("$else found without matching $if")
      return 0
   end

   # Check the previous (n) levels of the stack to make sure that
   #   we haven't previously turned off parsing.
   return 0 if @if_stack.detect {|x| x }

   # Invert the state of parsing if at top level.
   @_rl_parsing_conditionalized_out = !@_rl_parsing_conditionalized_out
   return 0
end

.parser_endif(args) ⇒ Object

Terminate a conditional, popping the value of

_rl_parsing_conditionalized_out from the stack.



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# File 'lib/rbreadline.rb', line 2186

def parser_endif(args)
   if (@if_stack.length>0)
      @_rl_parsing_conditionalized_out = @if_stack.pop
   else
      #_rl_init_file_error ("$endif without matching $if")
   end
   0
end

.parser_if(args) ⇒ Object

Push _rl_parsing_conditionalized_out, and set parser state based

on ARGS.



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# File 'lib/rbreadline.rb', line 2126

def parser_if(args)
   # Push parser state.
   @if_stack << @_rl_parsing_conditionalized_out

   # If parsing is turned off, then nothing can turn it back on except
   #   for finding the matching endif.  In that case, return right now.
   if @_rl_parsing_conditionalized_out
      return 0
   end

   args.downcase!
   # Handle "$if term=foo" and "$if mode=emacs" constructs.  If this
   #   isn't term=foo, or mode=emacs, then check to see if the first
   #   word in ARGS is the same as the value stored in rl_readline_name.
   if (@rl_terminal_name && args =~ /^term=/)
      # Terminals like "aaa-60" are equivalent to "aaa".
      tname = @rl_terminal_name.downcase.gsub(/-.*$/,'')

      # Test the `long' and `short' forms of the terminal name so that
      #if someone has a `sun-cmd' and does not want to have bindings
      #that will be executed if the terminal is a `sun', they can put
      #`$if term=sun-cmd' into their .inputrc.
      @_rl_parsing_conditionalized_out = (args[5..-1] != tname && args[5..-1] != @rl_terminal_name.downcase)
   elsif args =~ /^mode=/
      if args[5..-1] == "emacs"
         mode = @emacs_mode
      elsif args[5..-1] == "vi"
         mode = @vi_mode
      else
         mode = @no_mode
      end
      @_rl_parsing_conditionalized_out = (mode != @rl_editing_mode)
      # Check to see if the first word in ARGS is the same as the
      #   value stored in rl_readline_name.
   elsif (args == @rl_readline_name)
      @_rl_parsing_conditionalized_out = false
   else
      @_rl_parsing_conditionalized_out = true
   end
   return 0
end

.parser_include(args) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2195

def parser_include(args)
   return 0 if (@_rl_parsing_conditionalized_out)

   old_init_file = @current_readline_init_file
   old_line_number = @current_readline_init_lineno
   old_include_level = @current_readline_init_include_level

   r = _rl_read_init_file(args, old_include_level + 1)

   @current_readline_init_file = old_init_file
   @current_readline_init_lineno = old_line_number
   @current_readline_init_include_level = old_include_level

   return r
end

.path_isdir(filename) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6403

def path_isdir(filename)
   return File.directory?(filename)
end

.postprocess_matches(matchesp, matching_filenames) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6202

def postprocess_matches(matchesp, matching_filenames)
   matches = matchesp

   return 0 if matches.nil?

   # It seems to me that in all the cases we handle we would like
   #   to ignore duplicate possiblilities.  Scan for the text to
   #   insert being identical to the other completions.
   if (@rl_ignore_completion_duplicates)
      remove_duplicate_matches(matches)
   end

   # If we are matching filenames, then here is our chance to
   #   do clever processing by re-examining the list.  Call the
   #   ignore function with the array as a parameter.  It can
   #   munge the array, deleting matches as it desires.
   if (@rl_ignore_some_completions_function && matching_filenames)
      nmatch = matches.length
      send(@rl_ignore_some_completions_function,matches)
      if (matches.nil? || matches[0].nil?)
         matches = nil
         return 0
      else
         # If we removed some matches, recompute the common prefix.
         i = matches.length
         if (i > 1 && i < nmatch)
            t = matches[0]
            compute_lcd_of_matches(matches, i - 1, t)
         end
      end
   end

   matchesp = matches
   1
end

.prepare_terminal_settings(meta_flag) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6834

def prepare_terminal_settings(meta_flag)
   @readline_echoing_p = (`stty -a`.scan(/-*echo\b/).first == 'echo')

   # First, the basic settings to put us into character-at-a-time, no-echo
   #   input mode.
   setting = " -echo -icrnl cbreak"

   # If this terminal doesn't care how the 8th bit is used, then we can
   #   use it for the meta-key.  If only one of even or odd parity is
   #  specified, then the terminal is using parity, and we cannot.
   if (`stty -a`.scan(/-parenb\b/).first == '-parenb')
      setting << " pass8"
   end

   setting << " -ixoff"

   rl_bind_key(@_rl_tty_chars.t_start, :rl_restart_output)
   @_rl_eof_char = @_rl_tty_chars.t_eof

   #setting << " -isig"

   `stty #{setting}`
end

.previous_history ⇒ Object

Back up history_offset to the previous history entry, and return

a pointer to that entry.  If there is no previous entry then return
a NULL pointer.



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# File 'lib/rbreadline.rb', line 5291

def previous_history()
   @history_offset!=0 ? @the_history[@history_offset-=1] : nil
end

.print_filename(to_print, full_pathname) ⇒ Object

Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we

are using it, check for and output a single character for `special'
filenames.  Return the number of characters we output.



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# File 'lib/rbreadline.rb', line 6432

def print_filename(to_print, full_pathname)
   extension_char = 0.chr
   printed_len = fnprint(to_print)

   if (@rl_filename_completion_desired && (@rl_visible_stats || @_rl_complete_mark_directories))

      # If to_print != full_pathname, to_print is the basename of the
      # path passed.  In this case, we try to expand the directory
      # name before checking for the stat character.
      if (to_print != full_pathname)

         if full_pathname.nil? || full_pathname.length==0
            dn = "/"
         else
            dn = File.dirname(full_pathname)
         end
         s = File.expand_path(dn)
         if (@rl_directory_completion_hook)
            send(@rl_directory_completion_hook,s)
         end

         slen = s.length
         tlen = to_print.length
         new_full_pathname = s.dup
         if (s[-1] == ?/ )
            slen-=1
         else
            new_full_pathname[slen] = ?/
         end
         new_full_pathname[slen .. -1] = '/' + to_print

         if (@rl_visible_stats)
            extension_char = stat_char(new_full_pathname)
         else
            if (path_isdir(new_full_pathname))
               extension_char = '/'
            end
         end

         new_full_pathname = nil

      else

         s = File.expand_path(full_pathname)
         if (@rl_visible_stats)
            extension_char = stat_char(s)
         else
            if (path_isdir(s))
               extension_char = '/'
            end
         end
      end
      s = nil
      if (extension_char)
         @rl_outstream.write(extension_char)
         printed_len+=1
      end
   end

   printed_len
end

.printable_part(pathname) ⇒ Object

Return the portion of PATHNAME that should be output when listing

possible completions.  If we are hacking filename completion, we
are only interested in the basename, the portion following the
final slash.  Otherwise, we return what we were passed.  Since
printing empty strings is not very informative, if we're doing
filename completion, and the basename is the empty string, we look
for the previous slash and return the portion following that.  If
there's no previous slash, we just return what we were passed.



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# File 'lib/rbreadline.rb', line 6340

def printable_part(pathname)
   if (!@rl_filename_completion_desired)  # don't need to do anything
      return (pathname)
   end

   temp = pathname.rindex('/')
   return pathname if temp.nil?
   File.basename(pathname)
end

.prompt_ending_index ⇒ Object

  • _rl_last_c_pos is an absolute cursor position in multibyte locales and a buffer index in others. This macro is used when deciding whether the current cursor position is in the middle of a prompt string containing invisible characters.



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# File 'lib/rbreadline.rb', line 2545

def prompt_ending_index()
   if !@rl_byte_oriented
      @prompt_physical_chars
   else
      (@prompt_last_invisible+1)
   end
end

.readline(prompt) ⇒ Object

Read a line of input. Prompt with PROMPT. An empty PROMPT means

none.  A return value of NULL means that EOF was encountered.



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# File 'lib/rbreadline.rb', line 4712

def readline(prompt)
   # If we are at EOF return a NULL string.
   if (@rl_pending_input == EOF)
      rl_clear_pending_input()
      return nil
   end

   rl_set_prompt(prompt)

   rl_initialize()
   @readline_echoing_p = true
   if (@rl_prep_term_function)
      send(@rl_prep_term_function,@_rl_meta_flag)
   end
   rl_set_signals()

   value = readline_internal()
   if(@rl_deprep_term_function)
      send(@rl_deprep_term_function)
   end

   rl_clear_signals()

   value
end

.readline_default_bindings ⇒ Object

If this system allows us to look at the values of the regular

input editing characters, then bind them to their readline
equivalents, iff the characters are not bound to keymaps.



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# File 'lib/rbreadline.rb', line 2054

def readline_default_bindings()
   if @_rl_bind_stty_chars
      rl_tty_set_default_bindings(@_rl_keymap)
   end
end

.readline_initialize_everything ⇒ Object

Initialize the entire state of the world.



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# File 'lib/rbreadline.rb', line 2474

def readline_initialize_everything()
   # Set up input and output if they are not already set up.
   @rl_instream ||= $stdin

   @rl_outstream ||= $stdout

   # Bind _rl_in_stream and _rl_out_stream immediately.  These values
   #   may change, but hey may also be used before readline_internal ()
   #   is called.
   @_rl_in_stream = @rl_instream
   @_rl_out_stream = @rl_outstream

   # Allocate data structures.
   @rl_line_buffer ||= 0.chr * DEFAULT_BUFFER_SIZE

   # Initialize the terminal interface.
   @rl_terminal_name ||= ENV["TERM"]
   _rl_init_terminal_io(@rl_terminal_name)

   # Bind tty characters to readline functions.
   readline_default_bindings()

   # Decide whether we should automatically go into eight-bit mode.
   _rl_init_eightbit()

   # Read in the init file.
   rl_read_init_file(nil)

   # XXX
   if (@_rl_horizontal_scroll_mode && @_rl_term_autowrap)
      @_rl_screenwidth -= 1
      @_rl_screenchars -= @_rl_screenheight
   end

   # Override the effect of any `set keymap' assignments in the
   #   inputrc file.
   rl_set_keymap_from_edit_mode()

   # Try to bind a common arrow key prefix, if not already bound.
   bind_arrow_keys()

   # Enable the meta key, if this terminal has one.
   if @_rl_enable_meta
      _rl_enable_meta_key()
   end

   # If the completion parser's default word break characters haven't
   #   been set yet, then do so now.
   @rl_completer_word_break_characters ||= @rl_basic_word_break_characters
end

.readline_internal ⇒ Object

Read a line of input from the global rl_instream, doing output on

the global rl_outstream.
If rl_prompt is non-null, then that is our prompt.



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# File 'lib/rbreadline.rb', line 4704

def readline_internal()
   readline_internal_setup()
   eof = readline_internal_charloop()
   readline_internal_teardown(eof)
end

.readline_internal_charloop ⇒ Object 



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# File 'lib/rbreadline.rb', line 4593

def readline_internal_charloop()
   lastc = -1
   eof_found = false

   while (!@rl_done)
      lk = @_rl_last_command_was_kill

      #  send(rl_redisplay_function)
      #  @_rl_want_redisplay = false

      if (@rl_pending_input == 0)
         # Then initialize the argument and number of keys read.
         _rl_reset_argument()
         @rl_key_sequence_length = 0
      end

      rl_setstate(RL_STATE_READCMD)
      c = rl_read_key()
      rl_unsetstate(RL_STATE_READCMD)
      # look at input.c:rl_getc() for the circumstances under which this will
      #be returned; punt immediately on read error without converting it to
      #a newline.
      if (c == READERR)
         eof_found = true
         break
      end

      # EOF typed to a non-blank line is a <NL>.
      if (c == EOF && @rl_end!=0)
         c = NEWLINE
      end

      # The character _rl_eof_char typed to blank line, and not as the
      #previous character is interpreted as EOF.
      if (((c == @_rl_eof_char && lastc != c) || c == EOF) && @rl_end==0)
         eof_found = true
         break
      end
      lastc = c
      if _rl_dispatch(c, @_rl_keymap)== -1
         next
      end

      # If there was no change in _rl_last_command_was_kill, then no kill
      #has taken place.  Note that if input is pending we are reading
      #a prefix command, so nothing has changed yet.
      if (@rl_pending_input == 0 && lk == @_rl_last_command_was_kill)
         @_rl_last_command_was_kill = false
      end
      _rl_internal_char_cleanup()
   end

   eof_found
end

.readline_internal_setup ⇒ Object 



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# File 'lib/rbreadline.rb', line 3850

def readline_internal_setup()
   @_rl_in_stream = @rl_instream
   @_rl_out_stream = @rl_outstream

   if (@rl_startup_hook)
      send(@rl_startup_hook)
   end

   # If we're not echoing, we still want to at least print a prompt, because
   #   rl_redisplay will not do it for us.  If the calling application has a
   #   custom redisplay function, though, let that function handle it.
   if (!@readline_echoing_p && @rl_redisplay_function == :rl_redisplay)
      if (@rl_prompt && !@rl_already_prompted)
         nprompt = _rl_strip_prompt(@rl_prompt)
         @_rl_out_stream.write(nprompt)
         @_rl_out_stream.flush
      end
   else
      if (@rl_prompt && @rl_already_prompted)
         rl_on_new_line_with_prompt()
      else
         rl_on_new_line()
      end
      send(@rl_redisplay_function)
   end

   if (@rl_editing_mode == @vi_mode)
      rl_vi_insertion_mode(1, 'i')
   end
   if (@rl_pre_input_hook)
      send(@rl_pre_input_hook)
   end
end

.readline_internal_teardown(eof) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4675

def readline_internal_teardown(eof)
   # Restore the original of this history line, iff the line that we
   #   are editing was originally in the history, AND the line has changed.
   entry = current_history()

   if (entry && @rl_undo_list)
      temp = @rl_line_buffer.delete(0.chr).dup
      rl_revert_line(1, 0)
      entry = replace_history_entry(where_history(), @rl_line_buffer, nil)
      entry = nil

      @rl_line_buffer = temp+0.chr
      temp = nil
   end

   # At any rate, it is highly likely that this line has an undo list.  Get
   #   rid of it now.
   if (@rl_undo_list)
      rl_free_undo_list()
   end
   # Restore normal cursor, if available.
   _rl_set_insert_mode(RL_IM_INSERT, 0)

   (eof ? nil : @rl_line_buffer.delete(0.chr))
end

.redraw_prompt(t) ⇒ Object

Redraw the last line of a multi-line prompt that may possibly contain terminal escape sequences. Called with the cursor at column 0 of the line to draw the prompt on.



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# File 'lib/rbreadline.rb', line 8581

def redraw_prompt(t)
   oldp = @rl_display_prompt
   rl_save_prompt()

   @rl_display_prompt = t
   @local_prompt,@prompt_visible_length,@prompt_last_invisible,@prompt_invis_chars_first_line,@prompt_physical_chars =
   expand_prompt(t)
   @local_prompt_prefix = nil
   @local_prompt_len = @local_prompt ? @local_prompt.length : 0

   rl_forced_update_display()

   @rl_display_prompt = oldp
   rl_restore_prompt()
end

.release_sigint ⇒ Object 



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# File 'lib/rbreadline.rb', line 6798

def release_sigint()
   return if !@sigint_blocked
   #Signal.trap("INT",@sigint_proc)
   @sigint_blocked = false
end

.remove_duplicate_matches(matches) ⇒ Object

Filter out duplicates in MATCHES. This frees up the strings in

MATCHES.



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# File 'lib/rbreadline.rb', line 6192

def remove_duplicate_matches(matches)
   # Sort the items.
   # Sort the array without matches[0], since we need it to
   #   stay in place no matter what.
   if matches.length>0
      matches[1..-2] = matches[1..-2].sort.uniq
   end
   matches
end

.remove_history(which) ⇒ Object

Remove history element WHICH from the history. The removed

element is returned to you so you can free the line, data,
and containing structure.



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# File 'lib/rbreadline.rb', line 6782

def remove_history(which)
   if (which < 0 || which >= @history_length || @history_length ==  0 || @the_history.nil?)
      return nil
   end
   return_value = @the_history[which]
   @the_history.delete_at(which)
   @history_length-=1
   return_value
end

.replace_history_data(which, old, new) ⇒ Object

Replace the DATA in the specified history entries, replacing OLD with

NEW.  WHICH says which one(s) to replace:  WHICH == -1 means to replace
all of the history entries where entry->data == OLD; WHICH == -2 means
to replace the `newest' history entry where entry->data == OLD; and
WHICH >= 0 means to replace that particular history entry's data, as
long as it matches OLD.



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# File 'lib/rbreadline.rb', line 4911

def replace_history_data(which,old, new)
   new = new.dup if new
   if (which < -2 || which >= @history_length || @history_length == 0 || @the_history.nil?)
      return
   end
   if (which >= 0)
      entry = @the_history[which]
      if (entry && entry.data == old)
         entry.data = new
      end
      return
   end

   last = -1
   for i in 0 ... @history_length
      entry = @the_history[i]
      if entry.nil?
         next
      end
      if (entry.data == old)
         last = i
         if (which == -1)
            entry.data = new
         end
      end
   end
   if (which == -2 && last >= 0)
      entry = @the_history[last]
      entry.data = new  # XXX - we don't check entry->old
   end
end

.replace_history_entry(which, line, data) ⇒ Object

Make the history entry at WHICH have LINE and DATA. This returns

the old entry so you can dispose of the data.  In the case of an
invalid WHICH, a NULL pointer is returned.



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# File 'lib/rbreadline.rb', line 5265

def replace_history_entry (which, line, data)
   if (which < 0 || which >= @history_length)
      return nil
   end
   temp = Struct.new(:line,:timestamp,:data).new
   old_value = @the_history[which]
   temp.line = line.delete(0.chr)
   temp.data = data
   temp.timestamp = old_value.timestamp.dup
   @the_history[which] = temp
   old_value
end

.rl_abort(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4664

def rl_abort(count, key)
   _rl_abort_internal()
end

.rl_add_undo(what, start, _end, text) ⇒ Object

  • Remember how to undo something. Concatenate some undos if that seems right.



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# File 'lib/rbreadline.rb', line 4795

def rl_add_undo(what, start, _end, text)
   temp = alloc_undo_entry(what, start, _end, text)
   temp.next = @rl_undo_list
   @rl_undo_list = temp
end

.rl_alphabetic(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5063

def rl_alphabetic(c)
   if c =~ /\w/
      return true
   end

   return !!(@_rl_allow_pathname_alphabetic_chars &&
   @pathname_alphabetic_chars[c])
end

.rl_arrow_keys(count, c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5394

def rl_arrow_keys(count, c)
   rl_setstate(RL_STATE_MOREINPUT)
   ch = rl_read_key()
   rl_unsetstate(RL_STATE_MOREINPUT)

   case (ch.upcase)
   when 'A'
      rl_get_previous_history(count, ch)
   when 'B'
      rl_get_next_history(count, ch)
   when 'C'
      rl_forward_byte(count, ch)
   when 'D'
      rl_backward_byte(count, ch)
   else
      rl_ding()
   end
   0
end

.rl_attempted_completion_function ⇒ Object

Returns the value of attribute rl_attempted_completion_function.



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# File 'lib/rbreadline.rb', line 1097

def rl_attempted_completion_function
  @rl_attempted_completion_function
end

.rl_attempted_completion_function=(value) ⇒ Object

Sets the attribute rl_attempted_completion_function

Parameters:

  • value —

    the value to set the attribute rl_attempted_completion_function to.



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# File 'lib/rbreadline.rb', line 1097

def rl_attempted_completion_function=(value)
  @rl_attempted_completion_function = value
end

.rl_attempted_completion_over ⇒ Object

Returns the value of attribute rl_attempted_completion_over.



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# File 'lib/rbreadline.rb', line 1097

def rl_attempted_completion_over
  @rl_attempted_completion_over
end

.rl_attempted_completion_over=(value) ⇒ Object

Sets the attribute rl_attempted_completion_over

Parameters:

  • value —

    the value to set the attribute rl_attempted_completion_over to.



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# File 'lib/rbreadline.rb', line 1097

def rl_attempted_completion_over=(value)
  @rl_attempted_completion_over = value
end

.rl_backward(count, key) ⇒ Object

Backwards compatibility.



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# File 'lib/rbreadline.rb', line 5040

def rl_backward(count, key)
   rl_backward_char(count, key)
end

.rl_backward_byte(count, key) ⇒ Object

Move backward COUNT bytes.



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# File 'lib/rbreadline.rb', line 4995

def rl_backward_byte(count, key)
   if (count < 0)
      return (rl_forward_byte(-count, key))
   end
   if (count > 0)
      if (@rl_point < count)
         @rl_point = 0
         rl_ding()
      else
         @rl_point -= count
      end
   end

   if (@rl_point < 0)
      @rl_point = 0
   end
   0
end

.rl_backward_char(count, key) ⇒ Object

Move backward COUNT characters.



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# File 'lib/rbreadline.rb', line 5015

def rl_backward_char(count, key)
   if @rl_byte_oriented
      return (rl_backward_byte(count, key))
   end
   if (count < 0)
      return (rl_forward_char(-count, key))
   end

   if (count > 0)
      point = @rl_point
      while (count > 0 && point > 0)
         point = _rl_find_prev_mbchar(@rl_line_buffer, point, MB_FIND_NONZERO)
         count-=1
      end
      if (count > 0)
         @rl_point = 0
         rl_ding()
      else
         @rl_point = point
      end
   end
   0
end

.rl_backward_char_search(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7571

def rl_backward_char_search (count, key)
   _rl_char_search(count, BFIND, FFIND)
end

.rl_backward_kill_line(direction, ignore) ⇒ Object

Kill backwards to the start of the line. If DIRECTION is negative, kill

forwards to the line end instead.



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# File 'lib/rbreadline.rb', line 6983

def rl_backward_kill_line(direction, ignore)
   if (direction < 0)
      return (rl_kill_line(1, ignore))
   else
      if (@rl_point==0)
         rl_ding()
      else
         orig_point = @rl_point
         rl_beg_of_line(1, ignore)
         if (@rl_point != orig_point)
            rl_kill_text(orig_point, @rl_point)
         end
         if (@rl_editing_mode == @emacs_mode)
            @rl_mark = @rl_point
         end
      end
   end
   0
end

.rl_backward_kill_word(count, ignore) ⇒ Object

Rubout the word before point, placing it on the kill ring.



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# File 'lib/rbreadline.rb', line 7540

def rl_backward_kill_word(count, ignore)
   if (count < 0)
      return (rl_kill_word(-count, ignore))
   else
      orig_point = @rl_point
      rl_backward_word(count, ignore)
      if (@rl_point != orig_point)
         rl_kill_text(orig_point, @rl_point)
      end
      if (@rl_editing_mode == @emacs_mode)
         @rl_mark = @rl_point
      end
   end
   0
end

.rl_backward_word(count, key) ⇒ Object

Move backward a word. We do what Emacs does. Handles multibyte chars.



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# File 'lib/rbreadline.rb', line 5132

def rl_backward_word(count, key)
   if (count < 0)
      return (rl_forward_word(-count, key))
   end
   while (count>0)
      return 0 if (@rl_point == 0)

      # Like rl_forward_word (), except that we look at the characters
      # just before point.
      _p =  !@rl_byte_oriented ? _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO):(@rl_point-1)
      c = _rl_char_value(@rl_line_buffer, _p)
      if (!_rl_walphabetic(c))
         @rl_point = _p
         while (@rl_point > 0)
            _p = !@rl_byte_oriented ? _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO):(@rl_point-1)
            c = _rl_char_value(@rl_line_buffer, _p)
            if (_rl_walphabetic(c))
               break
            end
            @rl_point = _p
         end
      end
      while (@rl_point>0)
         _p = !@rl_byte_oriented ? _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO):(@rl_point-1)
         c = _rl_char_value(@rl_line_buffer, _p)
         if (!_rl_walphabetic(c))
            break
         else
            @rl_point = _p
         end
      end
      count -= 1
   end
   0
end

.rl_basic_quote_characters ⇒ Object

Returns the value of attribute rl_basic_quote_characters.



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# File 'lib/rbreadline.rb', line 1097

def rl_basic_quote_characters
  @rl_basic_quote_characters
end

.rl_basic_quote_characters=(value) ⇒ Object

Sets the attribute rl_basic_quote_characters

Parameters:

  • value —

    the value to set the attribute rl_basic_quote_characters to.



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# File 'lib/rbreadline.rb', line 1097

def rl_basic_quote_characters=(value)
  @rl_basic_quote_characters = value
end

.rl_basic_word_break_characters ⇒ Object

Returns the value of attribute rl_basic_word_break_characters.



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# File 'lib/rbreadline.rb', line 1097

def rl_basic_word_break_characters
  @rl_basic_word_break_characters
end

.rl_basic_word_break_characters=(value) ⇒ Object

Sets the attribute rl_basic_word_break_characters

Parameters:

  • value —

    the value to set the attribute rl_basic_word_break_characters to.



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# File 'lib/rbreadline.rb', line 1097

def rl_basic_word_break_characters=(value)
  @rl_basic_word_break_characters = value
end

.rl_beg_of_line(count, key) ⇒ Object

Move to the beginning of the line.



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# File 'lib/rbreadline.rb', line 5045

def rl_beg_of_line(count, key)
   @rl_point = 0
   0
end

.rl_begin_undo_group ⇒ Object

Begin a group. Subsequent undos are undone as an atomic operation.



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# File 'lib/rbreadline.rb', line 4862

def rl_begin_undo_group()
   rl_add_undo(UNDO_BEGIN, 0, 0, nil)
   @_rl_undo_group_level+=1
   0
end

.rl_beginning_of_history(count, key) ⇒ Object

Meta-< goes to the start of the history.



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# File 'lib/rbreadline.rb', line 7703

def rl_beginning_of_history(count, key)
   rl_get_previous_history(1 + where_history(), key)
end

.rl_bind_key(key, function) ⇒ Object

Bind KEY to FUNCTION. Returns non-zero if KEY is out of range.



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# File 'lib/rbreadline.rb', line 2370

def rl_bind_key(key, function)
   @_rl_keymap[key] = function
   @rl_binding_keymap = @_rl_keymap
   0
end

.rl_bind_keyseq_if_unbound(keyseq, default_func) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1926

def rl_bind_keyseq_if_unbound(keyseq, default_func)
   rl_bind_keyseq_if_unbound_in_map(keyseq, default_func, @_rl_keymap)
end

.rl_bind_keyseq_if_unbound_in_map(keyseq, default_func, kmap) ⇒ Object

Bind key sequence KEYSEQ to DEFAULT_FUNC if KEYSEQ is unbound. Right

now, this is always used to attempt to bind the arrow keys, hence the
check for rl_vi_movement_mode.



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# File 'lib/rbreadline.rb', line 1914

def rl_bind_keyseq_if_unbound_in_map(keyseq, default_func, kmap)
   if (keyseq)
      func = rl_function_of_keyseq(keyseq, kmap, nil)
      if (func.nil? || func == :rl_vi_movement_mode)
         return (rl_bind_keyseq_in_map(keyseq, default_func, kmap))
      else
         return 1
      end
   end
   0
end

.rl_bind_keyseq_in_map(keyseq, function, map) ⇒ Object

Bind the key sequence represented by the string KEYSEQ to

FUNCTION.  This makes new keymaps as necessary.  The initial
place to do bindings is in MAP.



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# File 'lib/rbreadline.rb', line 1906

def rl_bind_keyseq_in_map(keyseq, function, map)
   rl_generic_bind(ISFUNC, keyseq, function, map)
end

.rl_capitalize_word(count, key) ⇒ Object

Upcase the first letter, downcase the rest.



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# File 'lib/rbreadline.rb', line 7726

def rl_capitalize_word(count, key)
   rl_change_case(count, CapCase)
end

.rl_change_case(count, op) ⇒ Object

The meaty function.

Change the case of COUNT words, performing OP on them.
OP is one of UpCase, DownCase, or CapCase.
If a negative argument is given, leave point where it started,
otherwise, leave it where it moves to.



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# File 'lib/rbreadline.rb', line 7751

def rl_change_case(count, op)
   start = @rl_point
   rl_forward_word(count, 0)
   _end = @rl_point

   if (op != UpCase && op != DownCase && op != CapCase)
      rl_ding()
      return -1
   end

   if (count < 0)
      start,_end = _end,start
   end

   # We are going to modify some text, so let's prepare to undo it.
   rl_modifying(start, _end)

   inword = false
   while (start < _end)
      c = _rl_char_value(@rl_line_buffer, start)
      #  This assumes that the upper and lower case versions are the same width.
      if !@rl_byte_oriented
         _next = _rl_find_next_mbchar(@rl_line_buffer, start, 1, MB_FIND_NONZERO)
      else
         _next = start + 1
      end

      if (!_rl_walphabetic(c))
         inword = false
         start = _next
         next
      end

      if (op == CapCase)
         nop = inword ? DownCase : UpCase
         inword = true
      else
         nop = op
      end
      if (isascii(c))
         nc = (nop == UpCase) ? c.upcase : c.downcase
         @rl_line_buffer[start] = nc
      end

      start = _next
   end

   @rl_point = _end
   0
end

.rl_char_search(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7441

def rl_char_search(count, key)
   _rl_char_search(count, FFIND, BFIND)
end

.rl_character_len(c, pos) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5643

def rl_character_len(c, pos)
   if (meta_char(c))
      return ((!@_rl_output_meta_chars) ? 4 : 1)
   end
   if (c == "\t")
      return (((pos | 7) + 1) - pos)
   end
   if (ctrl_char(c) || c == RUBOUT)
      return (2)
   end

   return ((isprint(c)) ? 1 : 2)
end

.rl_cleanup_after_signal ⇒ Object

Clean up the terminal and readline state after catching a signal, before

resending it to the calling application.



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# File 'lib/rbreadline.rb', line 1491

def rl_cleanup_after_signal()
   _rl_clean_up_for_exit()
   if (@rl_deprep_term_function)
      send(@rl_deprep_term_function)
   end
   rl_clear_pending_input()
   rl_clear_signals()
end

.rl_clear_message ⇒ Object

How to clear things from the “echo-area”.



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# File 'lib/rbreadline.rb', line 4158

def rl_clear_message()
   @rl_display_prompt = @rl_prompt
   if (@msg_saved_prompt)
      rl_restore_prompt()
      @msg_saved_prompt = nil
   end
   send(@rl_redisplay_function)
   0
end

.rl_clear_pending_input ⇒ Object

Clear any pending input pushed with rl_execute_next()



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# File 'lib/rbreadline.rb', line 1628

def rl_clear_pending_input()
   @rl_pending_input = 0
   rl_unsetstate(RL_STATE_INPUTPENDING)
   0
end

.rl_clear_screen(count, key) ⇒ Object

C-l typed to a line without quoting clears the screen, and then reprints

the prompt and the current input line.  Given a numeric arg, redraw only
the current line.



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# File 'lib/rbreadline.rb', line 5218

def rl_clear_screen(count, key)
   if (@rl_explicit_arg)
      rl_refresh_line(count, key)
      return 0
   end

   _rl_clear_screen()      # calls termcap function to clear screen
   rl_forced_update_display()
   @rl_display_fixed = true
   0
end

.rl_clear_signals ⇒ Object 



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# File 'lib/rbreadline.rb', line 1638

def rl_clear_signals()
   if Signal.list['WINCH']
      trap "WINCH",@def_proc
   end
end

.rl_complete(ignore, invoking_key) ⇒ Object

Complete the word at or before point. You have supplied the function

that does the initial simple matching selection algorithm (see
rl_completion_matches ()).  The default is to do filename completion.



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# File 'lib/rbreadline.rb', line 6743

def rl_complete(ignore, invoking_key)
   if (@rl_inhibit_completion)
      return (_rl_insert_char(ignore, invoking_key))
   elsif (@rl_last_func == :rl_complete && !@completion_changed_buffer)
      return (rl_complete_internal('?'))
   elsif (@_rl_complete_show_all)
      return (rl_complete_internal('!'))
   elsif (@_rl_complete_show_unmodified)
      return (rl_complete_internal('@'))
   else
      return (rl_complete_internal(TAB))
   end
end

.rl_complete_internal(what_to_do) ⇒ Object

Complete the word at or before point.

WHAT_TO_DO says what to do with the completion.
`?' means list the possible completions.
TAB means do standard completion.
`*' means insert all of the possible completions.
`!' means to do standard completion, and list all possible completions if
there is more than one.
`@' means to do standard completion, and list all possible completions if
there is more than one and partial completion is not possible.



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# File 'lib/rbreadline.rb', line 6640

def rl_complete_internal(what_to_do)
   rl_setstate(RL_STATE_COMPLETING)
   set_completion_defaults(what_to_do)

   saved_line_buffer = @rl_line_buffer ? @rl_line_buffer.delete(0.chr) : nil
   our_func = @rl_completion_entry_function ?
   @rl_completion_entry_function : :rl_filename_completion_function
   # We now look backwards for the start of a filename/variable word.
   _end = @rl_point
   found_quote = false
   delimiter = 0.chr
   quote_char = 0.chr

   if (@rl_point!=0)
      # This (possibly) changes rl_point.  If it returns a non-zero char,
      #   we know we have an open quote.
      quote_char,found_quote,delimiter = _rl_find_completion_word()
   end

   start = @rl_point
   @rl_point = _end

   text = rl_copy_text(start, _end)
   matches = gen_completion_matches(text, start, _end, our_func, found_quote, quote_char)
   # nontrivial_lcd is set if the common prefix adds something to the word
   #   being completed.
   nontrivial_lcd = !!(matches && text != matches[0])
   text = nil
   if matches.nil?
      rl_ding()
      saved_line_buffer = nil
      @completion_changed_buffer = false
      rl_unsetstate(RL_STATE_COMPLETING)
      return 0
   end

   # If we are matching filenames, the attempted completion function will
   #   have set rl_filename_completion_desired to a non-zero value.  The basic
   #   rl_filename_completion_function does this.
   i = @rl_filename_completion_desired
   if (postprocess_matches(matches, i) == 0)
      rl_ding()
      saved_line_buffer = nil
      @completion_changed_buffer = false
      rl_unsetstate(RL_STATE_COMPLETING)
      return 0
   end

   case (what_to_do)

   when TAB,'!','@'
      # Insert the first match with proper quoting.
      if (matches[0])
         insert_match(matches[0], start, matches[1] ? MULT_MATCH : SINGLE_MATCH, quote_char)
      end
      # If there are more matches, ring the bell to indicate.
      # If we are in vi mode, Posix.2 says to not ring the bell.
      # If the `show-all-if-ambiguous' variable is set, display
      # all the matches immediately.  Otherwise, if this was the
      # only match, and we are hacking files, check the file to
      # see if it was a directory.  If so, and the `mark-directories'
      # variable is set, add a '/' to the name.  If not, and we
      # are at the end of the line, then add a space.
      if (matches[1])
         if (what_to_do == '!')
            display_matches(matches)
         elsif (what_to_do == '@')
            if (!nontrivial_lcd)
               display_matches(matches)
            end
         elsif (@rl_editing_mode != @vi_mode)
            rl_ding()   # There are other matches remaining.
         end
      else
         append_to_match(matches[0], delimiter, quote_char, nontrivial_lcd)
      end
   when '*'
      insert_all_matches(matches, start, quote_char)
   when '?'
      display_matches(matches)
   else
      $stderr.write("\r\nreadline: bad value #{what_to_do} for what_to_do in rl_complete\n")
      rl_ding()
      saved_line_buffer = nil
      rl_unsetstate(RL_STATE_COMPLETING)
      return 1
   end

   matches = nil

   # Check to see if the line has changed through all of this manipulation.
   if (saved_line_buffer)
      @completion_changed_buffer = @rl_line_buffer.delete(0.chr) != saved_line_buffer
      saved_line_buffer = nil
   end

   rl_unsetstate(RL_STATE_COMPLETING)
   0
end

.rl_completer_quote_characters ⇒ Object

Returns the value of attribute rl_completer_quote_characters.



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# File 'lib/rbreadline.rb', line 1097

def rl_completer_quote_characters
  @rl_completer_quote_characters
end

.rl_completer_quote_characters=(value) ⇒ Object

Sets the attribute rl_completer_quote_characters

Parameters:

  • value —

    the value to set the attribute rl_completer_quote_characters to.



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# File 'lib/rbreadline.rb', line 1097

def rl_completer_quote_characters=(value)
  @rl_completer_quote_characters = value
end

.rl_completer_word_break_characters ⇒ Object

Returns the value of attribute rl_completer_word_break_characters.



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# File 'lib/rbreadline.rb', line 1097

def rl_completer_word_break_characters
  @rl_completer_word_break_characters
end

.rl_completer_word_break_characters=(value) ⇒ Object

Sets the attribute rl_completer_word_break_characters

Parameters:

  • value —

    the value to set the attribute rl_completer_word_break_characters to.



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# File 'lib/rbreadline.rb', line 1097

def rl_completer_word_break_characters=(value)
  @rl_completer_word_break_characters = value
end

.rl_completion_append_character ⇒ Object

Returns the value of attribute rl_completion_append_character.



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# File 'lib/rbreadline.rb', line 1097

def rl_completion_append_character
  @rl_completion_append_character
end

.rl_completion_append_character=(value) ⇒ Object

Sets the attribute rl_completion_append_character

Parameters:

  • value —

    the value to set the attribute rl_completion_append_character to.



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# File 'lib/rbreadline.rb', line 1097

def rl_completion_append_character=(value)
  @rl_completion_append_character = value
end

.rl_completion_matches(text, entry_function) ⇒ Object

Return an array of (char *) which is a list of completions for TEXT.

If there are no completions, return a NULL pointer.
The first entry in the returned array is the substitution for TEXT.
The remaining entries are the possible completions.
The array is terminated with a NULL pointer.

ENTRY_FUNCTION is a function of two args, and returns a (char *).
  The first argument is TEXT.
  The second is a state argument it should be zero on the first call, and
  non-zero on subsequent calls.  It returns a NULL pointer to the caller
  when there are no more matches.



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# File 'lib/rbreadline.rb', line 1272

def rl_completion_matches(text, entry_function)
   matches = 0
   match_list_size = 10
   match_list = []
   match_list[1] = nil
   while (string = send(entry_function, text, matches))
      match_list[matches+=1] = string
      match_list[matches+1] = nil
   end

   # If there were any matches, then look through them finding out the
   # lowest common denominator.  That then becomes match_list[0].
   if (matches!=0)
      compute_lcd_of_matches(match_list, matches, text)
   else                # There were no matches.
      match_list = nil
   end
   return (match_list)
end

.rl_copy_text(from, to) ⇒ Object 



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# File 'lib/rbreadline.rb', line 4836

def rl_copy_text(from, to)
   return @rl_line_buffer[from...to]
end

.rl_crlf ⇒ Object

Move to the start of the next line.



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# File 'lib/rbreadline.rb', line 4544

def rl_crlf()
   if (@_rl_term_cr)
      @_rl_out_stream.write(@_rl_term_cr)
   end
   @_rl_out_stream.write("\n")
   return 0
end

.rl_delete(count, key) ⇒ Object

Delete the character under the cursor. Given a numeric argument,

kill that many characters instead.



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# File 'lib/rbreadline.rb', line 5753

def rl_delete(count, key)
   if (count < 0)
      return (_rl_rubout_char(-count, key))
   end
   if (@rl_point == @rl_end)
      rl_ding()
      return -1
   end

   if (count > 1 || @rl_explicit_arg)
      xpoint = @rl_point
      rl_forward_byte(count, key)

      rl_kill_text(xpoint, @rl_point)
      @rl_point = xpoint
   else
      if !@rl_byte_oriented
         xpoint =_rl_find_next_mbchar(@rl_line_buffer, @rl_point, 1, MB_FIND_NONZERO)
      else
         xpoint = @rl_point + 1
      end

      rl_delete_text(@rl_point, xpoint)
   end
   0
end

.rl_delete_horizontal_space(count, ignore) ⇒ Object

Delete all spaces and tabs around point.



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# File 'lib/rbreadline.rb', line 5925

def rl_delete_horizontal_space(count, ignore)
   start = @rl_point

   while (@rl_point!=0 && whitespace(@rl_line_buffer[@rl_point - 1]))
      @rl_point-=1
   end
   start = @rl_point
   while (@rl_point < @rl_end && whitespace(@rl_line_buffer[@rl_point]))
      @rl_point+=1
   end
   if (start != @rl_point)
      rl_delete_text(start, @rl_point)
      @rl_point = start
   end
   if (@rl_point < 0)
      @rl_point = 0
   end
   0
end

.rl_delete_or_show_completions(count, key) ⇒ Object

Like the tcsh editing function delete-char-or-list. The eof character

is caught before this is invoked, so this really does the same thing as
delete-char-or-list-or-eof, as long as it's bound to the eof character.



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# File 'lib/rbreadline.rb', line 5953

def rl_delete_or_show_completions(count, key)
   if (@rl_end != 0 && @rl_point == @rl_end)
      return (rl_possible_completions(count, key))
   else
      return (rl_delete(count, key))
   end
end

.rl_delete_text(from, to) ⇒ Object

Delete the string between FROM and TO. FROM is inclusive, TO is not.

Returns the number of characters deleted.



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# File 'lib/rbreadline.rb', line 4804

def rl_delete_text(from, to)

   # Fix it if the caller is confused.
   if (from > to)
      from,to = to,from
   end

   # fix boundaries
   if (to > @rl_end)
      to = @rl_end
      if (from > to)
         from = to
      end
   end
   if (from < 0)
      from = 0
   end
   text = rl_copy_text(from, to)
   diff = to - from
   @rl_line_buffer[from...to] = ''
   @rl_line_buffer << 0.chr * diff
   # Remember how to undo this delete.
   if (!@_rl_doing_an_undo)
      rl_add_undo(UNDO_DELETE, from, to, text)
   else
      text = nil
   end
   @rl_end -= diff
   @rl_line_buffer[@rl_end] = 0.chr
   return (diff)
end

.rl_deprep_term_function ⇒ Object

Returns the value of attribute rl_deprep_term_function.



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# File 'lib/rbreadline.rb', line 1097

def rl_deprep_term_function
  @rl_deprep_term_function
end

.rl_deprep_term_function=(value) ⇒ Object

Sets the attribute rl_deprep_term_function

Parameters:

  • value —

    the value to set the attribute rl_deprep_term_function to.



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# File 'lib/rbreadline.rb', line 1097

def rl_deprep_term_function=(value)
  @rl_deprep_term_function = value
end

.rl_deprep_terminal ⇒ Object

Restore the terminal’s normal settings and modes.



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# File 'lib/rbreadline.rb', line 6928

def rl_deprep_terminal()
   return if ENV["TERM"].nil?
   return if (!@terminal_prepped)

   # Try to keep this function from being interrupted.
   block_sigint()

   if (@_rl_enable_keypad)
      _rl_control_keypad(false)
   end

   @rl_outstream.flush

   # restore terminal setting
   `stty #{@otio}`

   @terminal_prepped = false
   rl_unsetstate(RL_STATE_TERMPREPPED)

   release_sigint()
end

.rl_digit_argument(ignore, key) ⇒ Object

Start a numeric argument with initial value KEY



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# File 'lib/rbreadline.rb', line 7683

def rl_digit_argument(ignore, key)
   _rl_arg_init()
   if (rl_isstate(RL_STATE_CALLBACK))
      _rl_arg_dispatch(@_rl_argcxt, key)
      rl_message("(arg: #{@rl_arg_sign * @rl_numeric_arg}) ")
      return 0
   else
      rl_execute_next(key)
      return (rl_digit_loop())
   end
end

.rl_digit_loop ⇒ Object

Handle C-u style numeric args, as well as M–, and M-digits.



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# File 'lib/rbreadline.rb', line 7667

def rl_digit_loop()
   while (true)
      return 1 if _rl_arg_overflow()!=0
      c = _rl_arg_getchar()
      if (c >= "\xFE")
         _rl_abort_internal()
         return -1
      end
      r = _rl_arg_dispatch(@_rl_argcxt, c)
      break if (r <= 0 || !rl_isstate(RL_STATE_NUMERICARG))
   end

   return r
end

.rl_ding ⇒ Object

Ring the terminal bell.



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# File 'lib/rbreadline.rb', line 3892

def rl_ding()
   if @MessageBeep
      @MessageBeep.Call(0)
   elsif @readline_echoing_p
      if @_rl_bell_preference == VISIBLE_BELL
         if (@_rl_visible_bell)
            @_rl_out_stream.write(@_rl_visible_bell.chr)
         else
            $stderr.write("\007")
            $stderr.flush
         end
      elsif @_rl_bell_preference == AUDIBLE_BELL
         $stderr.write("\007")
         $stderr.flush
      end
      return 0
   end
   return -1
end

.rl_display_match_list(matches, len, max) ⇒ Object

A convenience function for displaying a list of strings in

columnar format on readline's output stream.  MATCHES is the list
of strings, in argv format, LEN is the number of strings in MATCHES,
and MAX is the length of the longest string in MATCHES.



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# File 'lib/rbreadline.rb', line 8170

def rl_display_match_list(matches, len, max)
   # How many items of MAX length can we fit in the screen window?
   max += 2
   limit = @_rl_screenwidth / max
   if (limit != 1 && (limit * max == @_rl_screenwidth))
      limit-=1
   end
   # Avoid a possible floating exception.  If max > _rl_screenwidth,
   #   limit will be 0 and a divide-by-zero fault will result.
   if (limit == 0)
      limit = 1
   end
   # How many iterations of the printing loop?
   count = (len + (limit - 1)) / limit

   # Watch out for special case.  If LEN is less than LIMIT, then
   #   just do the inner printing loop.
   #     0 < len <= limit  implies  count = 1.

   # Sort the items if they are not already sorted.
   if (!@rl_ignore_completion_duplicates)
      matches[1,len] = matches[1,len].sort
   end
   rl_crlf()

   lines = 0
   if (!@_rl_print_completions_horizontally)
      # Print the sorted items, up-and-down alphabetically, like ls.
      for i in 1 .. count
         l = i
         for j in 0 ... limit
            if (l > len || matches[l].nil?)
               break
            else
               temp = printable_part(matches[l])
               printed_len = print_filename(temp, matches[l])

               if (j + 1 < limit)
                  @rl_outstream.write(' '*(max - printed_len))
               end
            end
            l += count
         end
         rl_crlf()
         lines+=1
         if (@_rl_page_completions && lines >= (@_rl_screenheight - 1) && i < count)
            lines = _rl_internal_pager(lines)
            return if (lines < 0)
         end
      end
   else
      # Print the sorted items, across alphabetically, like ls -x.
      i = 1
      while(matches[i])
         temp = printable_part(matches[i])
         printed_len = print_filename(temp, matches[i])
         # Have we reached the end of this line?
         if (matches[i+1])
            if ((limit > 1) && (i % limit) == 0)
               rl_crlf()
               lines+=1
               if (@_rl_page_completions && lines >= @_rl_screenheight - 1)
                  lines = _rl_internal_pager(lines)
                  return if (lines < 0)
               end
            else
               @rl_outstream.write(' '*(max - printed_len))
            end
         end
         i += 1
      end
      rl_crlf()
   end
end

.rl_display_search(search_string, reverse_p, where) ⇒ Object

Display the current state of the search in the echo-area.

SEARCH_STRING contains the string that is being searched for,
DIRECTION is zero for forward, or non-zero for reverse,
WHERE is the history list number of the current line.  If it is
-1, then this line is the starting one.



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# File 'lib/rbreadline.rb', line 7207

def rl_display_search(search_string, reverse_p, where)
   message = '('
   if (reverse_p)
      message << "reverse-"
   end
   message << "i-search)`"

   if (search_string)
      message << search_string
   end
   message << "': "

   rl_message(message)
   message = nil
   send(@rl_redisplay_function)
end

.rl_do_lowercase_version(ignore1, ignore2) ⇒ Object

What to do for some uppercase characters, like meta characters,

and some characters appearing in emacs_ctlx_keymap.  This function
is just a stub, you bind keys to it and the code in _rl_dispatch ()
is special cased.



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# File 'lib/rbreadline.rb', line 5639

def rl_do_lowercase_version(ignore1, ignore2)
   0
end

.rl_do_undo ⇒ Object 



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# File 'lib/rbreadline.rb', line 7451

def rl_do_undo()
   start = _end = waiting_for_begin = 0
   begin
      return 0 if @rl_undo_list.nil?

      @_rl_doing_an_undo = true
      rl_setstate(RL_STATE_UNDOING)

      # To better support vi-mode, a start or end value of -1 means
      # rl_point, and a value of -2 means rl_end.
      if (@rl_undo_list.what == UNDO_DELETE || @rl_undo_list.what == UNDO_INSERT)
         start = trans(@rl_undo_list.start)
         _end = trans(@rl_undo_list.end)
      end

      case (@rl_undo_list.what)
         # Undoing deletes means inserting some text.
      when UNDO_DELETE
         @rl_point = start
         rl_insert_text(@rl_undo_list.text)
         @rl_undo_list.text = nil

         # Undoing inserts means deleting some text.
      when UNDO_INSERT
         rl_delete_text(start, _end)
         @rl_point = start
         # Undoing an END means undoing everything 'til we get to a BEGIN.
      when UNDO_END
         waiting_for_begin+=1
         # Undoing a BEGIN means that we are done with this group.
      when UNDO_BEGIN
         if (waiting_for_begin!=0)
            waiting_for_begin-=1
         else
            rl_ding()
         end
      end

      @_rl_doing_an_undo = false
      rl_unsetstate(RL_STATE_UNDOING)

      release = @rl_undo_list
      @rl_undo_list = @rl_undo_list.next
      replace_history_data(-1, release, @rl_undo_list)
      release = nil
   end while (waiting_for_begin!=0)

   1
end

.rl_downcase_word(count, key) ⇒ Object

Lowercase the word at point.



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# File 'lib/rbreadline.rb', line 7721

def rl_downcase_word(count, key)
   rl_change_case(count, DownCase)
end

.rl_emacs_editing_mode(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1423

def rl_emacs_editing_mode(count, key)
   @rl_editing_mode = @emacs_mode
   _rl_set_insert_mode(RL_IM_INSERT, 1) # emacs mode default is insert mode
   @_rl_keymap = @emacs_standard_keymap
   0
end

.rl_end_of_history(count, key) ⇒ Object

Meta-> goes to the end of the history. (The current line).



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# File 'lib/rbreadline.rb', line 7708

def rl_end_of_history(count, key)
   rl_maybe_replace_line()
   using_history()
   rl_maybe_unsave_line()
   0
end

.rl_end_of_line(count, key) ⇒ Object

Move to the end of the line.



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# File 'lib/rbreadline.rb', line 5051

def rl_end_of_line(count, key)
   @rl_point = @rl_end
   0
end

.rl_end_undo_group ⇒ Object

End an undo group started with rl_begin_undo_group ().



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# File 'lib/rbreadline.rb', line 4869

def rl_end_undo_group()
   rl_add_undo(UNDO_END, 0, 0, nil)
   @_rl_undo_group_level-=1
   0
end

.rl_event_hook ⇒ Object

Returns the value of attribute rl_event_hook.



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# File 'lib/rbreadline.rb', line 1097

def rl_event_hook
  @rl_event_hook
end

.rl_event_hook=(value) ⇒ Object

Sets the attribute rl_event_hook

Parameters:

  • value —

    the value to set the attribute rl_event_hook to.



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# File 'lib/rbreadline.rb', line 1097

def rl_event_hook=(value)
  @rl_event_hook = value
end

.rl_exchange_point_and_mark(count, key) ⇒ Object

Exchange the position of mark and point.



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# File 'lib/rbreadline.rb', line 8153

def rl_exchange_point_and_mark(count, key)
   if (@rl_mark > @rl_end)
      @rl_mark = -1
   end
   if (@rl_mark == -1)
      rl_ding()
      return -1
   else
      @rl_point, @rl_mark = @rl_mark, @rl_point
   end
   0
end

.rl_execute_next(c) ⇒ Object

Make C be the next command to be executed.



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# File 'lib/rbreadline.rb', line 7696

def rl_execute_next(c)
   @rl_pending_input = c
   rl_setstate(RL_STATE_INPUTPENDING)
   0
end

.rl_expand_prompt(prompt) ⇒ Object

*

  • Expand the prompt string into the various display components, if

  • necessary.

*

  • local_prompt = expanded last line of string in rl_display_prompt

  • (portion after the final newline)

  • local_prompt_prefix = portion before last newline of rl_display_prompt,

  • expanded via expand_prompt

  • prompt_visible_length = number of visible characters in local_prompt

  • prompt_prefix_length = number of visible characters in local_prompt_prefix

*

  • This function is called once per call to readline(). It may also be

  • called arbitrarily to expand the primary prompt.

*

  • The return value is the number of visible characters on the last line

  • of the (possibly multi-line) prompt.

*



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# File 'lib/rbreadline.rb', line 1751

def rl_expand_prompt(prompt)
   @local_prompt = @local_prompt_prefix = nil
   @local_prompt_len = 0
   @prompt_last_invisible = @prompt_invis_chars_first_line = 0
   @prompt_visible_length = @prompt_physical_chars = 0

   if (prompt.nil? || prompt == '')
      return (0)
   end

   pi = prompt.rindex("\n")
   if pi.nil?
      # The prompt is only one logical line, though it might wrap.
      @local_prompt,@prompt_visible_length,@prompt_last_invisible,@prompt_invis_chars_first_line,@prompt_physical_chars =
      expand_prompt(prompt)
      @local_prompt_prefix = nil
      @local_prompt_len = @local_prompt ? @local_prompt.length : 0
      return (@prompt_visible_length)
   else
      # The prompt spans multiple lines.
      pi += 1 if prompt.length!=pi+1
      t = pi
      @local_prompt,@prompt_visible_length,@prompt_last_invisible,_,@prompt_physical_chars = expand_prompt(prompt[pi..-1])
      c = prompt[t]
      prompt[t] = 0.chr
      # The portion of the prompt string up to and including the
      #final newline is now null-terminated.
      @local_prompt_prefix,@prompt_prefix_length,_,@prompt_invis_chars_first_line, = expand_prompt(prompt)
      prompt[t] = c
      @local_prompt_len = @local_prompt ? @local_prompt.length : 0
      return (@prompt_prefix_length)
   end
end

.rl_extend_line_buffer(len) ⇒ Object

Increase the size of RL_LINE_BUFFER until it has enough space to hold

LEN characters.



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# File 'lib/rbreadline.rb', line 4740

def rl_extend_line_buffer(len)
   while (len >= @rl_line_buffer.length)
      @rl_line_buffer << 0.chr * DEFAULT_BUFFER_SIZE
   end
   @the_line = @rl_line_buffer
end

.rl_filename_completion_function(text, state) ⇒ Object

Okay, now we write the entry_function for filename completion. In the

general case.  Note that completion in the shell is a little different
because of all the pathnames that must be followed when looking up the
completion for a command.



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# File 'lib/rbreadline.rb', line 1109

def rl_filename_completion_function(text, state)
   # If we don't have any state, then do some initialization.
   if (state == 0)
      # If we were interrupted before closing the directory or reading
      #all of its contents, close it.
      if(@directory)
         @directory.close
         @directory = nil
      end
      text.delete!(0.chr)
      @filename = text.dup
      if text.length == 0
         text = "."
      end
      @dirname = File.dirname(text)
      # We aren't done yet.  We also support the "~user" syntax.

      # Save the version of the directory that the user typed.
      @users_dirname = @dirname.dup

      if (@dirname[0] == ?~)
         @dirname = File.expand_path(@dirname)
      end

      # The directory completion hook should perform any necessary
      #   dequoting.
      if (@rl_directory_completion_hook && send(rl_directory_completion_hook,@dirname))
         @users_dirname = @dirname.dup
      elsif (@rl_completion_found_quote && @rl_filename_dequoting_function)
         # delete single and double quotes
         @temp = send(@rl_filename_dequoting_function,@users_dirname, @rl_completion_quote_character)
         @users_dirname = temp
      end

      @directory = Dir.new(@dirname)

      # Now dequote a non-null filename.
      if (@filename && @filename.length>0 && @rl_completion_found_quote && @rl_filename_dequoting_function)
         # delete single and double quotes
         temp = send(@rl_filename_dequoting_function,@filename, @rl_completion_quote_character)
         @filename = temp
      end

      @filename_len = @filename.length
      @rl_filename_completion_desired = true
   end

   # At this point we should entertain the possibility of hacking wildcarded
   #   filenames, like /usr/man/man<WILD>/te<TAB>.  If the directory name
   #   contains globbing characters, then build an array of directories, and
   #   then map over that list while completing.
   # *** UNIMPLEMENTED ***

   # Now that we have some state, we can read the directory.
   entry = nil
   while(@directory && (entry = @directory.read))
      d_name = entry
      # Special case for no filename.  If the user has disabled the
      #   `match-hidden-files' variable, skip filenames beginning with `.'.
      #All other entries except "." and ".." match.
      if (@filename_len == 0)
         if (!@_rl_match_hidden_files && d_name[0]==?.)
            next
         end
         if (d_name != '.' && d_name != '..')
            break
         end
      else
         # Otherwise, if these match up to the length of filename, then
         #   it is a match.

         if (@_rl_completion_case_fold)
            break if d_name =~ /^#{Regexp.escape(@filename)}/i
         else
            break if d_name =~ /^#{Regexp.escape(@filename)}/
         end
      end
   end

   if entry.nil?
      if @directory
         @directory.close
         @directory = nil
      end
      @dirname = nil
      @filename = nil
      @users_dirname = nil

      return nil
   else
      if (@dirname != '.')
         if (@rl_complete_with_tilde_expansion && @users_dirname[0] == ?~)
            temp = @dirname
            if(temp[-1] != ?/)
               temp += '/'
            end
         else
            temp = @users_dirname
            if(temp[-1] != ?/)
               temp += '/'
            end
         end
         temp += entry
      else
         temp = entry.dup
      end
      return (temp)
   end
end

.rl_filename_quote_characters ⇒ Object

Returns the value of attribute rl_filename_quote_characters.



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# File 'lib/rbreadline.rb', line 1097

def rl_filename_quote_characters
  @rl_filename_quote_characters
end

.rl_filename_quote_characters=(value) ⇒ Object

Sets the attribute rl_filename_quote_characters

Parameters:

  • value —

    the value to set the attribute rl_filename_quote_characters to.



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# File 'lib/rbreadline.rb', line 1097

def rl_filename_quote_characters=(value)
  @rl_filename_quote_characters = value
end

.rl_forced_update_display ⇒ Object

Actually update the display, period.



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# File 'lib/rbreadline.rb', line 5189

def rl_forced_update_display()
   if (@visible_line)
      @visible_line.gsub!(/[^\x00]/,0.chr)
   end
   rl_on_new_line()
   @forced_display=true if !@forced_display
   send(@rl_redisplay_function)
   0
end

.rl_forward(count, key) ⇒ Object

Backwards compatibility.



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# File 'lib/rbreadline.rb', line 4990

def rl_forward(count, key)
   rl_forward_char(count, key)
end

.rl_forward_byte(count, key) ⇒ Object

Move forward COUNT bytes.



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# File 'lib/rbreadline.rb', line 4944

def rl_forward_byte(count, key)
   if (count < 0)
      return (rl_backward_byte(-count, key))
   end
   if (count > 0)
      _end = @rl_point + count
      lend = @rl_end > 0 ? @rl_end - ((@rl_editing_mode == @vi_mode)?1:0) : @rl_end
      if (_end > lend)
         @rl_point = lend
         rl_ding()
      else
         @rl_point = _end
      end
   end

   if (@rl_end < 0)
      @rl_end = 0
   end
   return 0
end

.rl_forward_char(count, key) ⇒ Object

Move forward COUNT characters.



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# File 'lib/rbreadline.rb', line 4966

def rl_forward_char(count, key)
   if @rl_byte_oriented
      return (rl_forward_byte(count, key))
   end
   if (count < 0)
      return (rl_backward_char(-count, key))
   end
   if (count > 0)
      point = _rl_find_next_mbchar(@rl_line_buffer, @rl_point, count, MB_FIND_NONZERO)
      if (@rl_end <= point && @rl_editing_mode == @vi_mode)
         point = _rl_find_prev_mbchar(@rl_line_buffer, @rl_end, MB_FIND_NONZERO)
      end
      if (@rl_point == point)
         rl_ding()
      end
      @rl_point = point
      if (@rl_end < 0)
         @rl_end = 0
      end
   end
   0
end

.rl_forward_search_history(sign, key) ⇒ Object

Search forwards through the history looking for a string which is typed

interactively.  Start with the current line.



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# File 'lib/rbreadline.rb', line 7021

def rl_forward_search_history(sign, key)
   rl_search_history(sign, key)
end

.rl_forward_word(count, key) ⇒ Object

Move forward a word. We do what Emacs does. Handles multibyte chars.



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# File 'lib/rbreadline.rb', line 5077

def rl_forward_word(count, key)
   if (count < 0)
      return (rl_backward_word(-count, key))
   end

   while (count>0)
      return 0 if (@rl_point == @rl_end)

      # If we are not in a word, move forward until we are in one.
      # Then, move forward until we hit a non-alphabetic character.
      c = _rl_char_value(@rl_line_buffer, @rl_point)

      if (!_rl_walphabetic(c))
         if !@rl_byte_oriented
            @rl_point = _rl_find_next_mbchar(@rl_line_buffer, @rl_point, 1, MB_FIND_NONZERO)
         else
            @rl_point += 1
         end
         while (@rl_point < @rl_end)
            c = _rl_char_value(@rl_line_buffer, @rl_point)
            if (_rl_walphabetic(c))
               break
            end
            if !@rl_byte_oriented
               @rl_point = _rl_find_next_mbchar(@rl_line_buffer, @rl_point, 1, MB_FIND_NONZERO)
            else
               @rl_point += 1
            end
         end
      end

      return 0 if (@rl_point == @rl_end)

      if !@rl_byte_oriented
         @rl_point = _rl_find_next_mbchar(@rl_line_buffer, @rl_point, 1, MB_FIND_NONZERO)
      else
         @rl_point += 1
      end
      while (@rl_point < @rl_end)
         c = _rl_char_value(@rl_line_buffer, @rl_point)
         if (!_rl_walphabetic(c))
            break
         end
         if !@rl_byte_oriented
            @rl_point = _rl_find_next_mbchar(@rl_line_buffer, @rl_point, 1, MB_FIND_NONZERO)
         else
            @rl_point += 1
         end
      end
      count -= 1
   end
   0
end

.rl_free_undo_list ⇒ Object 



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# File 'lib/rbreadline.rb', line 4875

def rl_free_undo_list()
   replace_history_data(-1, @rl_undo_list, nil)
   @rl_undo_list = nil
end

.rl_function_of_keyseq(keyseq, map, type) ⇒ Object

Return the function (or macro) definition which would be invoked via

KEYSEQ if executed in MAP.  If MAP is NULL, then the current keymap is
used.  TYPE, if non-NULL, is a pointer to an int which will receive the
type of the object pointed to.  One of ISFUNC (function), ISKMAP (keymap),
or ISMACR (macro).



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# File 'lib/rbreadline.rb', line 1888

def rl_function_of_keyseq(keyseq, map, type)
   map ||= @_rl_keymap
   map[keyseq]
end

.rl_generic_bind(type, keyseq, data, map) ⇒ Object

Bind the key sequence represented by the string KEYSEQ to

the arbitrary pointer DATA.  TYPE says what kind of data is
pointed to by DATA, right now this can be a function (ISFUNC),
a macro (ISMACR), or a keymap (ISKMAP).  This makes new keymaps
as necessary.  The initial place to do bindings is in MAP.



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# File 'lib/rbreadline.rb', line 1898

def rl_generic_bind(type, keyseq, data, map)
   map[keyseq] = data
   0
end

.rl_get_char ⇒ Object

Get a key from the buffer of characters to be read.

Return the key in KEY.
Result is KEY if there was a key, or 0 if there wasn't.



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# File 'lib/rbreadline.rb', line 4457

def rl_get_char()
   if (@push_index == @pop_index)
      return nil
   end
   key = @ibuffer[@pop_index]
   @pop_index += 1

   if (@pop_index >= @ibuffer_len)
      @pop_index = 0
   end

   return key
end

.rl_get_keymap_name_from_edit_mode ⇒ Object 



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# File 'lib/rbreadline.rb', line 2419

def rl_get_keymap_name_from_edit_mode()
   if (@rl_editing_mode == @emacs_mode)
      "emacs"
   elsif (@rl_editing_mode == @vi_mode)
      "vi"
   else
      "none"
   end
end

.rl_get_next_history(count, key) ⇒ Object

Move down to the next history line.



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# File 'lib/rbreadline.rb', line 5363

def rl_get_next_history(count, key)
   if (count < 0)
      return (rl_get_previous_history(-count, key))
   end
   if (count == 0)
      return 0
   end
   rl_maybe_replace_line()

   # either not saved by rl_newline or at end of line, so set appropriately.
   if (@_rl_history_saved_point == -1 && (@rl_point!=0 || @rl_end!=0))
      @_rl_history_saved_point = (@rl_point == @rl_end) ? -1 : @rl_point
   end
   temp = nil
   while (count>0)
      temp = next_history()
      if temp.nil?
         break
      end
      count -= 1
   end

   if temp.nil?
      rl_maybe_unsave_line()
   else
      rl_replace_from_history(temp, 0)
      _rl_history_set_point()
   end
   0
end

.rl_get_previous_history(count, key) ⇒ Object

Get the previous item out of our interactive history, making it the current

line.  If there is no previous history, just ding.



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# File 'lib/rbreadline.rb', line 5304

def rl_get_previous_history(count, key)
   if (count < 0)
      return (rl_get_next_history(-count, key))
   end
   if (count == 0)
      return 0
   end
   # either not saved by rl_newline or at end of line, so set appropriately.
   if (@_rl_history_saved_point == -1 && (@rl_point!=0 || @rl_end!=0))
      @_rl_history_saved_point = (@rl_point == @rl_end) ? -1 : @rl_point
   end

   # If we don't have a line saved, then save this one.
   rl_maybe_save_line()

   # If the current line has changed, save the changes.
   rl_maybe_replace_line()

   temp = old_temp = nil
   while (count>0)
      temp = previous_history()
      if temp.nil?
         break
      end
      old_temp = temp
      count -= 1
   end

   # If there was a large argument, and we moved back to the start of the
   #   history, that is not an error.  So use the last value found.
   if (temp.nil? && old_temp)
      temp = old_temp
   end

   if temp.nil?
      rl_ding()
   else
      rl_replace_from_history(temp, 0)
      _rl_history_set_point()
   end

   0
end

.rl_initialize ⇒ Object

Initialize readline (and terminal if not already).



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# File 'lib/rbreadline.rb', line 3721

def rl_initialize()
   # If we have never been called before, initialize the
   #   terminal and data structures.
   if (!@rl_initialized)
      rl_setstate(RL_STATE_INITIALIZING)
      readline_initialize_everything()
      rl_unsetstate(RL_STATE_INITIALIZING)
      @rl_initialized = true
      rl_setstate(RL_STATE_INITIALIZED)
   end

   # Initalize the current line information.
   _rl_init_line_state()

   # We aren't done yet.  We haven't even gotten started yet!
   @rl_done = false
   rl_unsetstate(RL_STATE_DONE)

   # Tell the history routines what is going on.
   _rl_start_using_history()

   # Make the display buffer match the state of the line.
   rl_reset_line_state()

   # No such function typed yet.
   @rl_last_func = nil

   # Parsing of key-bindings begins in an enabled state.
   @_rl_parsing_conditionalized_out = 0

   if (@rl_editing_mode == @vi_mode)
      _rl_vi_initialize_line()
   end
   # Each line starts in insert mode (the default).
   _rl_set_insert_mode(RL_IM_DEFAULT, 1)

   return 0
end

.rl_insert(count, c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5505

def rl_insert(count, c)
   ((@rl_insert_mode == RL_IM_INSERT) ? _rl_insert_char(count, c) :
   _rl_overwrite_char(count, c))
end

.rl_insert_comment(count, key) ⇒ Object

Turn the current line into a comment in shell history.

A K*rn shell style function.



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# File 'lib/rbreadline.rb', line 5963

def rl_insert_comment(count, key)
   rl_beg_of_line(1, key)
   @rl_comment_text = @_rl_comment_begin ? @_rl_comment_begin : '#'

   if (!@rl_explicit_arg)
      rl_insert_text(@rl_comment_text)
   else
      @rl_comment_len = @rl_comment_text.length
      if @rl_comment_text[0,@rl_comment_len] == @rl_line_buffer[0,@rl_comment_len]
         rl_delete_text(@rl_point, @rl_point + @rl_comment_len)
      else
         rl_insert_text(@rl_comment_text)
      end
   end

   send(@rl_redisplay_function)
   rl_newline(1, "\n")
   0
end

.rl_insert_completions(ignore, invoking_key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7575

def rl_insert_completions(ignore, invoking_key)
   rl_complete_internal('*')
end

.rl_insert_text(string) ⇒ Object

Insert a string of text into the line at point. This is the only

way that you should do insertion.  _rl_insert_char () calls this
function.  Returns the number of characters inserted.



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# File 'lib/rbreadline.rb', line 4750

def rl_insert_text(string)
   string.delete!(0.chr)
   l = string.length
   return 0 if (l == 0)

   if (@rl_end + l >= @rl_line_buffer.length)
      rl_extend_line_buffer(@rl_end + l)
   end
   @rl_line_buffer[@rl_point,0] = string

   # Remember how to undo this if we aren't undoing something.
   if (!@_rl_doing_an_undo)
      # If possible and desirable, concatenate the undos.
      if ((l == 1) &&
         @rl_undo_list &&
         (@rl_undo_list.what == UNDO_INSERT) &&
         (@rl_undo_list.end == @rl_point) &&
         (@rl_undo_list.end - @rl_undo_list.start < 20))
         @rl_undo_list.end+=1
      else
         rl_add_undo(UNDO_INSERT, @rl_point, @rl_point + l, nil)
      end
   end
   @rl_point += l
   @rl_end += l
   if @rl_line_buffer.length <= @rl_end
      @rl_line_buffer << 0.chr * (@rl_end - @rl_line_buffer.length + 1)
   else
      @rl_line_buffer[@rl_end] = "\0"
   end
   l
end

.rl_instream ⇒ Object

Returns the value of attribute rl_instream.



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# File 'lib/rbreadline.rb', line 1097

def rl_instream
  @rl_instream
end

.rl_instream=(value) ⇒ Object

Sets the attribute rl_instream

Parameters:

  • value —

    the value to set the attribute rl_instream to.



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# File 'lib/rbreadline.rb', line 1097

def rl_instream=(value)
  @rl_instream = value
end

.rl_isstate(x) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1623

def rl_isstate(x)
   (@rl_readline_state & (x))!=0
end

.rl_kill_full_line(count, ignore) ⇒ Object

Kill the whole line, no matter where point is.



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# File 'lib/rbreadline.rb', line 7004

def rl_kill_full_line(count, ignore)
   rl_begin_undo_group()
   @rl_point = 0
   rl_kill_text(@rl_point, @rl_end)
   @rl_mark = 0
   rl_end_undo_group()
   0
end

.rl_kill_line(direction, ignore) ⇒ Object

Kill from here to the end of the line. If DIRECTION is negative, kill

back to the line start instead.



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# File 'lib/rbreadline.rb', line 6964

def rl_kill_line (direction, ignore)
   if (direction < 0)
      return (rl_backward_kill_line(1, ignore))
   else
      orig_point = @rl_point
      rl_end_of_line(1, ignore)
      if (orig_point != @rl_point)
         rl_kill_text(orig_point, @rl_point)
      end
      @rl_point = orig_point
      if (@rl_editing_mode == @emacs_mode)
         @rl_mark = @rl_point
      end
   end
   0
end

.rl_kill_text(from, to) ⇒ Object

The way to kill something. This appends or prepends to the last

kill, if the last command was a kill command.  if FROM is less
than TO, then the text is appended, otherwise prepended.  If the
last command was not a kill command, then a new slot is made for
this kill.



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# File 'lib/rbreadline.rb', line 5833

def rl_kill_text(from, to)
   # Is there anything to kill?
   if (from == to)
      @_rl_last_command_was_kill = true if !@_rl_last_command_was_kill
      return 0
   end
   text = rl_copy_text(from, to)

   # Delete the copied text from the line.
   rl_delete_text(from, to)
   _rl_copy_to_kill_ring(text, from < to)
   @_rl_last_command_was_kill = true if !@_rl_last_command_was_kill
   0
end

.rl_kill_word(count, key) ⇒ Object

Delete the word at point, saving the text in the kill ring.



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# File 'lib/rbreadline.rb', line 7520

def rl_kill_word(count, key)
   if (count < 0)
      return (rl_backward_kill_word(-count, key))
   else
      orig_point = @rl_point
      rl_forward_word(count, key)

      if (@rl_point != orig_point)
         rl_kill_text(orig_point, @rl_point)
      end

      @rl_point = orig_point
      if (@rl_editing_mode == @emacs_mode)
         rl_mark = @rl_point
      end
   end
   0
end

.rl_library_version ⇒ Object

Returns the value of attribute rl_library_version.



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# File 'lib/rbreadline.rb', line 1097

def rl_library_version
  @rl_library_version
end

.rl_library_version=(value) ⇒ Object

Sets the attribute rl_library_version

Parameters:

  • value —

    the value to set the attribute rl_library_version to.



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# File 'lib/rbreadline.rb', line 1097

def rl_library_version=(value)
  @rl_library_version = value
end

.rl_maybe_replace_line ⇒ Object

Perhaps put back the current line if it has changed.



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# File 'lib/rbreadline.rb', line 5279

def rl_maybe_replace_line()
   temp = current_history()
   # If the current line has changed, save the changes.
   if (temp && temp.data != @rl_undo_list)
      temp = replace_history_entry(where_history(), @rl_line_buffer, @rl_undo_list)
   end
   0
end

.rl_maybe_save_line ⇒ Object

Save the current line in _rl_saved_line_for_history.



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# File 'lib/rbreadline.rb', line 5246

def rl_maybe_save_line()
   if @_rl_saved_line_for_history.nil?
      @_rl_saved_line_for_history = Struct.new(:line,:timestamp,:data).new
      @_rl_saved_line_for_history.line = @rl_line_buffer.dup
      @_rl_saved_line_for_history.timestamp = nil
      @_rl_saved_line_for_history.data = @rl_undo_list
   end
   0
end

.rl_maybe_unsave_line ⇒ Object

Restore the _rl_saved_line_for_history if there is one.



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# File 'lib/rbreadline.rb', line 5231

def rl_maybe_unsave_line()
   if (@_rl_saved_line_for_history)
      # Can't call with `1' because rl_undo_list might point to an undo
      # list from a history entry, as in rl_replace_from_history() below.
      rl_replace_line(@_rl_saved_line_for_history.line, false)
      @rl_undo_list = @_rl_saved_line_for_history.data
      @_rl_saved_line_for_history = nil
      @rl_point = @rl_end  # rl_replace_line sets rl_end
   else
      rl_ding()
   end
   0
end

.rl_message(msg_buf) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7188

def rl_message(msg_buf)
   @rl_display_prompt = msg_buf
   if @saved_local_prompt.nil?
      rl_save_prompt()
      @msg_saved_prompt = true
   end
   @local_prompt,@prompt_visible_length,@prompt_last_invisible,@prompt_invis_chars_first_line,@prompt_physical_chars =
   expand_prompt(msg_buf)
   @local_prompt_prefix = nil
   @local_prompt_len = @local_prompt ? @local_prompt.length : 0
   send(@rl_redisplay_function)
   0
end

.rl_modifying(start, _end) ⇒ Object

Save an undo entry for the text from START to END.



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# File 'lib/rbreadline.rb', line 7731

def rl_modifying(start, _end)
   if (start > _end)
      start,_end = _end,start
   end

   if (start != _end)
      temp = rl_copy_text(start, _end)
      rl_begin_undo_group()
      rl_add_undo(UNDO_DELETE, start, _end, temp)
      rl_add_undo(UNDO_INSERT, start, _end, nil)
      rl_end_undo_group()
   end
   0
end

.rl_named_function(name) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2323

def rl_named_function(name)
   case name
   when "accept-line"
      return :rl_newline
   when "arrow-key-prefix"
      return :rl_arrow_keys
   when "backward-delete-char"
      return :rl_rubout
   when "character-search"
      return :rl_char_search
   when  "character-search-backward"
      return :rl_backward_char_search
   when "copy-region-as-kill"
      return :rl_copy_region_to_kill
   when "delete-char"
      return :rl_delete
   when "delete-char-or-list"
      return :rl_delete_or_show_completions
   when "forward-backward-delete-char"
      return :rl_rubout_or_delete
   when "kill-whole-line"
      return :rl_kill_full_line
   when "non-incremental-forward-search-history"
      return :rl_noninc_forward_search
   when "non-incremental-reverse-search-history"
      return :rl_noninc_reverse_search
   when "non-incremental-forward-search-history-again"
      return :rl_noninc_forward_search_again
   when "non-incremental-reverse-search-history-again"
      return :rl_noninc_reverse_search_again
   when "redraw-current-line"
      return :rl_refresh_line
   when "self-insert"
      return :rl_insert
   when "undo"
      return :rl_undo_command
   when "beginning-of-line"
      return :rl_beg_of_line
   else
      if name =~ /^[-a-z]+$/
         return ('rl_'+name.gsub('-','_')).to_sym
      end
   end
   nil
end

.rl_newline(count, key) ⇒ Object

What to do when a NEWLINE is pressed. We accept the whole line.

KEY is the key that invoked this command.  I guess it could have
meaning in the future.



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# File 'lib/rbreadline.rb', line 5610

def rl_newline(count, key)
   @rl_done = true

   if (@_rl_history_preserve_point)
      @_rl_history_saved_point = (@rl_point == @rl_end) ? 1 : @rl_point
   end
   rl_setstate(RL_STATE_DONE)

   if (@rl_editing_mode == @vi_mode)
      _rl_vi_done_inserting()
      if (_rl_vi_textmod_command(@_rl_vi_last_command).nil?)   # XXX
         _rl_vi_reset_last()
      end
   end
   # If we've been asked to erase empty lines, suppress the final update,
   #   since _rl_update_final calls rl_crlf().
   if (@rl_erase_empty_line && @rl_point == 0 && @rl_end == 0)
      return 0
   end
   if @readline_echoing_p
      _rl_update_final()
   end
   0
end

.rl_noninc_forward_search(count, key) ⇒ Object

Search forward through the history list for a string. If the vi-mode

code calls this, KEY will be `?'.



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# File 'lib/rbreadline.rb', line 7838

def rl_noninc_forward_search(count, key)
   noninc_search(1, (key == '?') ? '?' : nil)
end

.rl_noninc_reverse_search(count, key) ⇒ Object

Reverse search the history list for a string. If the vi-mode code

calls this, KEY will be `/'.



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# File 'lib/rbreadline.rb', line 7844

def rl_noninc_reverse_search(count, key)
   noninc_search(-1, (key == '/') ? '/' : nil)
end

.rl_on_new_line ⇒ Object

Tell the update routines that we have moved onto a new (empty) line.



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# File 'lib/rbreadline.rb', line 3695

def rl_on_new_line()
   if (@visible_line)
      @visible_line[0] = 0.chr
   end
   @_rl_last_c_pos = @_rl_last_v_pos = 0
   @_rl_vis_botlin = @last_lmargin = 0
   if (@vis_lbreaks)
      @vis_lbreaks[0] = @vis_lbreaks[1] = 0
   end
   @visible_wrap_offset = 0
   0
end

.rl_on_new_line_with_prompt ⇒ Object

Tell the update routines that we have moved onto a new line with the

prompt already displayed.  Code originally from the version of readline
distributed with CLISP.  rl_expand_prompt must have already been called
(explicitly or implicitly).  This still doesn't work exactly right.



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# File 'lib/rbreadline.rb', line 3795

def rl_on_new_line_with_prompt()
   # Initialize visible_line and invisible_line to ensure that they can hold
   #   the already-displayed prompt.
   prompt_size = @rl_prompt.length + 1
   init_line_structures(prompt_size)

   # Make sure the line structures hold the already-displayed prompt for
   #   redisplay.
   lprompt = @local_prompt ? @local_prompt : @rl_prompt
   @visible_line[0,lprompt.length] = lprompt
   @invisible_line[0,lprompt.length] = lprompt

   # If the prompt contains newlines, take the last tail.
   prompt_last_line = rl_prompt.rindex("\n")
   if prompt_last_line.nil?
      prompt_last_line = @rl_prompt
   else
      prompt_last_line = @rl_prompt[prompt_last_line..-1]
   end
   l = prompt_last_line.length
   if !@rl_byte_oriented
      @_rl_last_c_pos = _rl_col_width(prompt_last_line, 0, l)
   else
      @_rl_last_c_pos = l
   end

   # Dissect prompt_last_line into screen lines. Note that here we have
   #   to use the real screenwidth. Readline's notion of screenwidth might be
   #   one less, see terminal.c.
   real_screenwidth = @_rl_screenwidth + (@_rl_term_autowrap ? 0 : 1)
   @_rl_last_v_pos = l / real_screenwidth
   # If the prompt length is a multiple of real_screenwidth, we don't know
   #   whether the cursor is at the end of the last line, or already at the
   #   beginning of the next line. Output a newline just to be safe.
   if (l > 0 && (l % real_screenwidth) == 0)
      _rl_output_some_chars("\n",0,1)
   end
   @last_lmargin = 0

   newlines = 0
   i = 0
   while (i <= l)
      @_rl_vis_botlin = newlines
      @vis_lbreaks[newlines] = i
      newlines += 1
      i += real_screenwidth
   end
   @vis_lbreaks[newlines] = l
   @visible_wrap_offset = 0

   @rl_display_prompt = @rl_prompt  # XXX - make sure it's set

   return 0
end

.rl_outstream ⇒ Object

Returns the value of attribute rl_outstream.



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# File 'lib/rbreadline.rb', line 1097

def rl_outstream
  @rl_outstream
end

.rl_outstream=(value) ⇒ Object

Sets the attribute rl_outstream

Parameters:

  • value —

    the value to set the attribute rl_outstream to.



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# File 'lib/rbreadline.rb', line 1097

def rl_outstream=(value)
  @rl_outstream = value
end

.rl_overwrite_mode(count, key) ⇒ Object

Toggle overwrite mode. A positive explicit argument selects overwrite

mode.  A negative or zero explicit argument selects insert mode.



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# File 'lib/rbreadline.rb', line 1437

def rl_overwrite_mode(count, key)
   if (!@rl_explicit_arg)
      _rl_set_insert_mode(@rl_insert_mode ^ 1, 0)
   elsif (count > 0)
      _rl_set_insert_mode(RL_IM_OVERWRITE, 0)
   else
      _rl_set_insert_mode(RL_IM_INSERT, 0)
   end
   0
end

.rl_parse_and_bind(string) ⇒ Object

Read the binding command from STRING and perform it.

A key binding command looks like: Keyname: function-name\0,
a variable binding command looks like: set variable value.
A new-style keybinding looks like "\C-x\C-x": exchange-point-and-mark.



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# File 'lib/rbreadline.rb', line 2380

def rl_parse_and_bind(string)

   # If this is a parser directive, act on it.
   if (string[0] == ?$)
      handle_parser_directive(string[1..-1])
      return 0
   end

   # If we aren't supposed to be parsing right now, then we're done.
   return 0 if @_rl_parsing_conditionalized_out

   if string =~ /^set/i
      _,var,value = string.downcase.split(' ')
      rl_variable_bind(var, value)
      return 0
   end

   key,funname = string.split(/\s*:\s*/)
   key = instance_eval(key)
   rl_bind_key(key, rl_named_function(funname))

   0
end

.rl_possible_completions(ignore, invoking_key) ⇒ Object

List the possible completions. See description of rl_complete ().



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# File 'lib/rbreadline.rb', line 5946

def rl_possible_completions(ignore, invoking_key)
   rl_complete_internal('?')
end

.rl_prep_terminal(meta_flag) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6880

def rl_prep_terminal(meta_flag)
   if no_terminal?
      @readline_echoing_p = true
      return
   end

   return if (@terminal_prepped)

   # Try to keep this function from being INTerrupted.
   block_sigint()

   if (@_rl_bind_stty_chars)
      # If editing in vi mode, make sure we restore the bindings in the
      # insertion keymap no matter what keymap we ended up in.
      if (@rl_editing_mode == @vi_mode)
         rl_tty_unset_default_bindings(@vi_insertion_keymap)
      else
         rl_tty_unset_default_bindings(@_rl_keymap)
      end
   end

   save_tty_chars()

   rl_setstate(RL_STATE_TTYCSAVED)
   if (@_rl_bind_stty_chars)

      # If editing in vi mode, make sure we set the bindings in the
      # insertion keymap no matter what keymap we ended up in.
      if (@rl_editing_mode == @vi_mode)
         _rl_bind_tty_special_chars(@vi_insertion_keymap)
      else
         _rl_bind_tty_special_chars(@_rl_keymap)
      end
   end

   prepare_terminal_settings(meta_flag)

   if (@_rl_enable_keypad)
      _rl_control_keypad(true)
   end
   @rl_outstream.flush
   @terminal_prepped = true
   rl_setstate(RL_STATE_TERMPREPPED)

   release_sigint()
end

.rl_quoted_insert(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 5520

def rl_quoted_insert(count, key)
   _rl_insert_next(count)
end

.rl_re_read_init_file(count, ignore) ⇒ Object

Re-read the current keybindings file.



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# File 'lib/rbreadline.rb', line 8146

def rl_re_read_init_file(count, ignore)
   r = rl_read_init_file(nil)
   rl_set_keymap_from_edit_mode()
   r
end

.rl_read_init_file(filename) ⇒ Object

Do key bindings from a file. If FILENAME is NULL it defaults

to the first non-null filename from this list:
  1. the filename used for the previous call
  2. the value of the shell variable `INPUTRC'
  3. ~/.inputrc
  4. /etc/inputrc
If the file existed and could be opened and read, 0 is returned,
otherwise errno is returned.



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# File 'lib/rbreadline.rb', line 2073

def rl_read_init_file(filename)
   # Default the filename.
   filename ||= @last_readline_init_file
   filename ||= ENV["INPUTRC"]
   if (filename.nil? || filename == '')
      filename = DEFAULT_INPUTRC
      # Try to read DEFAULT_INPUTRC; fall back to SYS_INPUTRC on failure
      if (_rl_read_init_file(filename, 0) == 0)
         return 0
      end
      filename = SYS_INPUTRC
   end

   if RUBY_PLATFORM =~ /mswin|mingw/
      return 0 if (_rl_read_init_file(filename, 0) == 0)
      filename = "~/_inputrc"
   end
   return (_rl_read_init_file(filename, 0))
end

.rl_read_key ⇒ Object

Read a key, including pending input.



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# File 'lib/rbreadline.rb', line 4411

def rl_read_key()
   @rl_key_sequence_length+=1

   if (@rl_pending_input!=0)
      c = @rl_pending_input
      rl_clear_pending_input()
   else
      # If the user has an event function, then call it periodically.
      if (@rl_event_hook)
         while (@rl_event_hook && (c=rl_get_char()).nil?)

            send(@rl_event_hook)
            if (@rl_done)     # XXX - experimental
               return ("\n")
            end
            if (rl_gather_tyi() < 0)   # XXX - EIO
               @rl_done = true
               return ("\n")
            end
         end

      else

         if (c=rl_get_char()).nil? # do we have one cached?
            c = send(@rl_getc_function,@rl_instream)
         end
      end
   end

   return (c)
end

.rl_readline_name ⇒ Object

Returns the value of attribute rl_readline_name.



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# File 'lib/rbreadline.rb', line 1097

def rl_readline_name
  @rl_readline_name
end

.rl_readline_name=(value) ⇒ Object

Sets the attribute rl_readline_name

Parameters:

  • value —

    the value to set the attribute rl_readline_name to.



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# File 'lib/rbreadline.rb', line 1097

def rl_readline_name=(value)
  @rl_readline_name = value
end

.rl_redisplay ⇒ Object

Basic redisplay algorithm.



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# File 'lib/rbreadline.rb', line 3057

def rl_redisplay()
   return if !@readline_echoing_p

   _rl_wrapped_multicolumn = 0

   @rl_display_prompt ||= ""

   if (@invisible_line.nil? || @vis_lbreaks.nil?)
      init_line_structures(0)
      rl_on_new_line()
   end

   # Draw the line into the buffer.
   @cpos_buffer_position = -1

   line = @invisible_line
   out = inv_botlin = 0

   # Mark the line as modified or not.  We only do this for history
   #   lines.
   modmark = 0
   if (@_rl_mark_modified_lines && current_history() && @rl_undo_list)
      line[out] = '*'
      out += 1
      line[out] = 0.chr
      modmark = 1
   end

   # If someone thought that the redisplay was handled, but the currently
   #   visible line has a different modification state than the one about
   #   to become visible, then correct the caller's misconception.
   if (@visible_line[0] != @invisible_line[0])
      @rl_display_fixed = false
   end

   # If the prompt to be displayed is the `primary' readline prompt (the
   #   one passed to readline()), use the values we have already expanded.
   #   If not, use what's already in rl_display_prompt.  WRAP_OFFSET is the
   #   number of non-visible characters in the prompt string.
   if (@rl_display_prompt == @rl_prompt || @local_prompt)

      if (@local_prompt_prefix && @forced_display)
         _rl_output_some_chars(@local_prompt_prefix,0,@local_prompt_prefix.length)
      end
      if (@local_prompt_len > 0)

         temp = @local_prompt_len + out + 2
         if (temp >= @line_size)
            @line_size = (temp + 1024) - (temp % 1024)
            if @visible_line.length >= @line_size
               @visible_line = @visible_line[0,@line_size]
            else
               @visible_line += 0.chr * (@line_size-@visible_line.length)
            end

            if @invisible_line.length >= @line_size
               @invisible_line = @invisible_line[0,@line_size]
            else
               @invisible_line += 0.chr * (@line_size-@invisible_line.length)
            end
            if @encoding=='X'
               @visible_line.force_encoding('ASCII-8BIT')
               @invisible_line.force_encoding('ASCII-8BIT')
            end
            line = @invisible_line
         end
         line[out,@local_prompt_len] = @local_prompt
         out += @local_prompt_len
      end
      line[out] = 0.chr
      @wrap_offset = @local_prompt_len - @prompt_visible_length
   else
      prompt_this_line = @rl_display_prompt.rindex("\n")
      if prompt_this_line.nil?
         prompt_this_line = 0
      else
         prompt_this_line+=1

         pmtlen = prompt_this_line # temp var
         if (@forced_display)
            _rl_output_some_chars(@rl_display_prompt,0,pmtlen)
            # Make sure we are at column zero even after a newline,
            #regardless of the state of terminal output processing.
            if (pmtlen < 2 || @rl_display_prompt[prompt_this_line-2] != ?\r)
               cr()
            end
         end
      end

      @prompt_physical_chars = pmtlen = @rl_display_prompt.length - prompt_this_line
      temp = pmtlen + out + 2
      if (temp >= @line_size)
         @line_size = (temp + 1024) - (temp % 1024)
         if @visible_line.length >= @line_size
            @visible_line = @visible_line[0,@line_size]
         else
            @visible_line += 0.chr * (@line_size-@visible_line.length)
         end

         if @invisible_line.length >= @line_size
            @invisible_line = @invisible_line[0,@line_size]
         else
            @invisible_line += 0.chr * (@line_size-@invisible_line.length)
         end
         if @encoding=='X'
            @visible_line.force_encoding('ASCII-8BIT')
            @invisible_line.force_encoding('ASCII-8BIT')
         end

         line = @invisible_line
      end
      line[out,pmtlen] = @rl_display_prompt[prompt_this_line,pmtlen]
      out += pmtlen
      line[out] = 0.chr
      @wrap_offset = @prompt_invis_chars_first_line = 0
   end
   # inv_lbreaks[i] is where line i starts in the buffer.
   @inv_lbreaks[newlines = 0] = 0
   lpos = @prompt_physical_chars + modmark

   @_rl_wrapped_line = Array.new(@visible_line.length,0)
   num = 0

   # prompt_invis_chars_first_line is the number of invisible characters in
   #   the first physical line of the prompt.
   #  wrap_offset - prompt_invis_chars_first_line is the number of invis
   #   chars on the second line.

   # what if lpos is already >= _rl_screenwidth before we start drawing the
   #   contents of the command line?
   while (lpos >= @_rl_screenwidth)
      # fix from Darin Johnson <[email protected]> for prompt string with
      #   invisible characters that is longer than the screen width.  The
      #   prompt_invis_chars_first_line variable could be made into an array
      #   saying how many invisible characters there are per line, but that's
      #   probably too much work for the benefit gained.  How many people have
      #   prompts that exceed two physical lines?
      #   Additional logic fix from Edward Catmur <[email protected]>
      if (!@rl_byte_oriented)
         n0 = num
         temp = @local_prompt_len
         while (num < temp)
            z = _rl_col_width(@local_prompt, n0, num)
            if (z > @_rl_screenwidth)
               num = _rl_find_prev_mbchar(@local_prompt, num, MB_FIND_ANY)
               break
            elsif (z == @_rl_screenwidth)
               break
            end
            num+=1
         end
         temp = num
      else
         temp = ((newlines + 1) * @_rl_screenwidth)
      end

      # Now account for invisible characters in the current line.
      temp += (@local_prompt_prefix.nil? ? ((newlines == 0) ? @prompt_invis_chars_first_line :
      ((newlines == 1) ? @wrap_offset : 0)) :
      ((newlines == 0) ? @wrap_offset : 0))

      @inv_lbreaks[newlines+=1] = temp
      if !@rl_byte_oriented
         lpos -= _rl_col_width(@local_prompt, n0, num)
      else
         lpos -= @_rl_screenwidth
      end
   end
   @prompt_last_screen_line = newlines

   # Draw the rest of the line (after the prompt) into invisible_line, keeping
   #   track of where the cursor is (cpos_buffer_position), the number of the line containing
   #   the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin).
   #   It maintains an array of line breaks for display (inv_lbreaks).
   #   This handles expanding tabs for display and displaying meta characters.
   lb_linenum = 0
   _in = 0
   if !@rl_byte_oriented && @rl_end>0
      case @encoding
      when 'E'
         wc = @rl_line_buffer[0,@rl_end].scan(/./me)[0]
         wc_bytes = wc ? wc.length : 1
      when 'S'
         wc = @rl_line_buffer[0,@rl_end].scan(/./ms)[0]
         wc_bytes = wc ? wc.length : 1
      when 'U'
         wc = @rl_line_buffer[0,@rl_end].scan(/./mu)[0]
         wc_bytes = wc ? wc.length : 1
      when 'X'
         wc = @rl_line_buffer[0,@rl_end].force_encoding(@encoding_name)[0]
         wc_bytes = wc ? wc.bytesize : 1
      end
   else
      wc_bytes = 1
   end

   while(_in < @rl_end)

      c = @rl_line_buffer[_in,1]
      if(c == 0.chr)
         @rl_end = _in
         break
      end
      if (!@rl_byte_oriented)
         case @encoding
         when 'U'
            wc_width = wc && wc.unpack('U').first >= 0x1000 ? 2 : 1
         when 'X'
            wc_width = wc && wc.ord > 0x1000 ? 2 : 1
         else
            wc_width = wc ? wc.length : 1
         end
      end
      if (out + 8 >= @line_size)    # XXX - 8 for \t
         @line_size *= 2
         if @visible_line.length>=@line_size
            @visible_line = @visible_line[0,@line_size]
         else
            @visible_line += 0.chr * (@line_size-@visible_line.length)
         end
         if @invisible_line.length>=@line_size
            @invisible_line = @invisible_line[0,@line_size]
         else
            @invisible_line += 0.chr * (@line_size-@invisible_line.length)
         end
         line = @invisible_line
      end

      if (_in == @rl_point)
         @cpos_buffer_position = out
         lb_linenum = newlines
      end
      if (false && meta_char(c))
         if (!@_rl_output_meta_chars && false)
            line[out,4] = "\\%03o" % c.ord

            if (lpos + 4 >= @_rl_screenwidth)
               temp = @_rl_screenwidth - lpos
               @inv_lbreaks[newlines+=1] = out + temp
               lpos = 4 - temp
            else
               lpos += 4
            end
            out += 4
         else
            line[out] = c
            out += 1
            lpos+=1
            if (lpos >= @_rl_screenwidth)
               @inv_lbreaks[newlines+=1] = out
               @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
               lpos = 0
            end
         end

      elsif (c == "\t")

         newout = out + 8 - lpos % 8
         temp = newout - out
         if (lpos + temp >= @_rl_screenwidth)
            temp2 = @_rl_screenwidth - lpos
            @inv_lbreaks[newlines+=1] = out + temp2
            lpos = temp - temp2
            while (out < newout)
               line[out] = ' '
               out += 1
            end

         else

            while (out < newout)
               line[out] = ' '
               out += 1
            end
            lpos += temp
         end

      elsif (c == "\n" && !@_rl_horizontal_scroll_mode && @_rl_term_up)
         line[out] = 0.chr # XXX - sentinel
         out += 1
         @inv_lbreaks[newlines+=1] = out
         lpos = 0
      elsif (ctrl_char(c) || c == RUBOUT)
         line[out] = '^'
         out += 1
         lpos+=1
         if (lpos >= @_rl_screenwidth)
            @inv_lbreaks[newlines+=1] = out
            @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
            lpos = 0
         end
         line[out] = ctrl_char(c) ? (c[0].ord|0x40).chr.upcase : '?'
         out += 1
         lpos+=1
         if (lpos >= @_rl_screenwidth)
            @inv_lbreaks[newlines+=1] = out
            @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
            lpos = 0
         end
      else

         if (!@rl_byte_oriented)
            _rl_wrapped_multicolumn = 0
            if (@_rl_screenwidth < lpos + wc_width)
               for i in lpos ... @_rl_screenwidth
                  # The space will be removed in update_line()
                  line[out] = ' '
                  out += 1
                  _rl_wrapped_multicolumn+=1
                  lpos+=1
                  if (lpos >= @_rl_screenwidth)
                     @inv_lbreaks[newlines+=1] = out
                     @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
                     lpos = 0
                  end
               end
            end
            if (_in == @rl_point)
               @cpos_buffer_position = out
               lb_linenum = newlines
            end
            line[out,wc_bytes] = @rl_line_buffer[_in,wc_bytes]
            out += wc_bytes
            for i in 0 ... wc_width
               lpos+=1
               if (lpos >= @_rl_screenwidth)
                  @inv_lbreaks[newlines+=1] = out
                  @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
                  lpos = 0
               end
            end
         else
            line[out] = c
            out += 1
            lpos+=1
            if (lpos >= @_rl_screenwidth)
               @inv_lbreaks[newlines+=1] = out
               @_rl_wrapped_line[newlines] = _rl_wrapped_multicolumn
               lpos = 0
            end
         end

      end

      if (!@rl_byte_oriented)
         _in += wc_bytes
         case @encoding
         when 'E'
            wc = @rl_line_buffer[_in,@rl_end - _in].scan(/./me)[0]
            wc_bytes = wc ? wc.length : 1
         when 'S'
            wc = @rl_line_buffer[_in,@rl_end - _in].scan(/./ms)[0]
            wc_bytes = wc ? wc.length : 1
         when 'U'
            wc = @rl_line_buffer[_in,@rl_end - _in].scan(/./mu)[0]
            wc_bytes = wc ? wc.length : 1
         when 'X'
            wc = @rl_line_buffer[_in,@rl_end - _in].force_encoding(@encoding_name)[0]
            wc_bytes = wc ? wc.bytesize : 1
         end

      else
         _in+=1
      end
   end

   line[out] = 0.chr

   if (@cpos_buffer_position < 0)
      @cpos_buffer_position = out
      lb_linenum = newlines
   end

   inv_botlin = lb_botlin = newlines
   @inv_lbreaks[newlines+1] = out
   cursor_linenum = lb_linenum

   # CPOS_BUFFER_POSITION == position in buffer where cursor should be placed.
   #   CURSOR_LINENUM == line number where the cursor should be placed.

   # PWP: now is when things get a bit hairy.  The visible and invisible
   #   line buffers are really multiple lines, which would wrap every
   #   (screenwidth - 1) characters.  Go through each in turn, finding
   #   the changed region and updating it.  The line order is top to bottom.

   # If we can move the cursor up and down, then use multiple lines,
   #   otherwise, let long lines display in a single terminal line, and
   #   horizontally scroll it.

   if (!@_rl_horizontal_scroll_mode && @_rl_term_up)
      if (!@rl_display_fixed || @forced_display)
         @forced_display = false
         # If we have more than a screenful of material to display, then
         #   only display a screenful.  We should display the last screen,
         #   not the first.
         if (out >= @_rl_screenchars)
            if (!@rl_byte_oriented)
               out = _rl_find_prev_mbchar(line, @_rl_screenchars, MB_FIND_ANY)
            else
               out = @_rl_screenchars - 1
            end
         end

         # The first line is at character position 0 in the buffer.  The
         #   second and subsequent lines start at inv_lbreaks[N], offset by
         #   OFFSET (which has already been calculated above).

         # For each line in the buffer, do the updating display.
         for linenum in  0 .. inv_botlin
            # This can lead us astray if we execute a program that changes
            #the locale from a non-multibyte to a multibyte one.
            o_cpos = @_rl_last_c_pos
            @cpos_adjusted = false
            update_line(@visible_line,vis_pos(linenum), inv_line(linenum), linenum,
            vis_llen(linenum), inv_llen(linenum), inv_botlin)

            if (linenum == 0 && !@rl_byte_oriented &&
               !@cpos_adjusted &&
               @_rl_last_c_pos != o_cpos &&
               @_rl_last_c_pos > @wrap_offset &&
               o_cpos < @prompt_last_invisible)
               @_rl_last_c_pos -= @wrap_offset
            end

            # If this is the line with the prompt, we might need to
            # compensate for invisible characters in the new line. Do
            # this only if there is not more than one new line (which
            # implies that we completely overwrite the old visible line)
            # and the new line is shorter than the old.  Make sure we are
            # at the end of the new line before clearing.
            if (linenum == 0 &&
               inv_botlin == 0 && @_rl_last_c_pos == out &&
               (@wrap_offset > @visible_wrap_offset) &&
               (@_rl_last_c_pos < @visible_first_line_len))
               if !@rl_byte_oriented
                  nleft = @_rl_screenwidth - @_rl_last_c_pos
               else
                  nleft = @_rl_screenwidth + @wrap_offset - @_rl_last_c_pos
               end
               if (nleft!=0)
                  _rl_clear_to_eol(nleft)
               end
            end

            # Since the new first line is now visible, save its length.
            if (linenum == 0)
               @visible_first_line_len = (inv_botlin > 0) ? @inv_lbreaks[1] : out - @wrap_offset
            end
         end

         # We may have deleted some lines.  If so, clear the left over
         #   blank ones at the bottom out.
         if (@_rl_vis_botlin > inv_botlin)
            while(linenum <= @_rl_vis_botlin)
               tt = vis_chars(linenum)
               _rl_move_vert(linenum)
               _rl_move_cursor_relative(0, tt)
               _rl_clear_to_eol((linenum == @_rl_vis_botlin) ? tt.length : @_rl_screenwidth)
               linenum += 1
            end
         end
         @_rl_vis_botlin = inv_botlin

         # CHANGED_SCREEN_LINE is set to 1 if we have moved to a
         #   different screen line during this redisplay.
         changed_screen_line = @_rl_last_v_pos != cursor_linenum
         if (changed_screen_line)
            _rl_move_vert(cursor_linenum)
            # If we moved up to the line with the prompt using _rl_term_up,
            # the physical cursor position on the screen stays the same,
            # but the buffer position needs to be adjusted to account
            # for invisible characters.
            if (@rl_byte_oriented && cursor_linenum == 0 && @wrap_offset!=0)
               @_rl_last_c_pos += @wrap_offset
            end
         end
         # We have to reprint the prompt if it contains invisible
         #   characters, since it's not generally OK to just reprint
         #   the characters from the current cursor position.  But we
         #   only need to reprint it if the cursor is before the last
         #   invisible character in the prompt string.
         nleft = @prompt_visible_length + @wrap_offset
         if (cursor_linenum == 0 && @wrap_offset > 0 && @_rl_last_c_pos > 0 &&
            @_rl_last_c_pos < prompt_ending_index() && @local_prompt)
            if (@_rl_term_cr)
               @rl_outstream.write(@_rl_term_cr)
            end
            _rl_output_some_chars(@local_prompt,0,nleft)
            if !@rl_byte_oriented
               @_rl_last_c_pos = _rl_col_width(@local_prompt, 0, nleft) - @wrap_offset
            else
               @_rl_last_c_pos = nleft
            end
         end

         # Where on that line?  And where does that line start
         #   in the buffer?
         pos = @inv_lbreaks[cursor_linenum]
         # nleft == number of characters in the line buffer between the
         #   start of the line and the desired cursor position.
         nleft = @cpos_buffer_position - pos

         # NLEFT is now a number of characters in a buffer.  When in a
         #   multibyte locale, however, _rl_last_c_pos is an absolute cursor
         #   position that doesn't take invisible characters in the prompt
         #   into account.  We use a fudge factor to compensate.

         # Since _rl_backspace() doesn't know about invisible characters in the
         #   prompt, and there's no good way to tell it, we compensate for
         #   those characters here and call _rl_backspace() directly.

         if (@wrap_offset!=0 && cursor_linenum == 0 && nleft < @_rl_last_c_pos)
            # TX == new physical cursor position in multibyte locale.
            if !@rl_byte_oriented
               tx = _rl_col_width(@visible_line, pos, pos+nleft) - @visible_wrap_offset
            else
               tx = nleft
            end
            if (@_rl_last_c_pos > tx)
               _rl_backspace(@_rl_last_c_pos - tx) # XXX
               @_rl_last_c_pos = tx
            end
         end
         # We need to note that in a multibyte locale we are dealing with
         #   _rl_last_c_pos as an absolute cursor position, but moving to a
         #   point specified by a buffer position (NLEFT) that doesn't take
         #   invisible characters into account.
         if !@rl_byte_oriented
            _rl_move_cursor_relative(nleft, @invisible_line,pos)
         elsif (nleft != @_rl_last_c_pos)
            _rl_move_cursor_relative(nleft, @invisible_line,pos)
         end
      end

   else           # Do horizontal scrolling.

      # Always at top line.
      @_rl_last_v_pos = 0

      # Compute where in the buffer the displayed line should start.  This
      # will be LMARGIN.

      # The number of characters that will be displayed before the cursor.
      ndisp = @cpos_buffer_position - @wrap_offset
      nleft  = @prompt_visible_length + @wrap_offset
      # Where the new cursor position will be on the screen.  This can be
      # longer than SCREENWIDTH; if it is, lmargin will be adjusted.
      phys_c_pos = @cpos_buffer_position - (@last_lmargin!=0 ? @last_lmargin : @wrap_offset)
      t = @_rl_screenwidth / 3

      # If the number of characters had already exceeded the screenwidth,
      #last_lmargin will be > 0.

      # If the number of characters to be displayed is more than the screen
      # width, compute the starting offset so that the cursor is about
      # two-thirds of the way across the screen.
      if (phys_c_pos > @_rl_screenwidth - 2)
         lmargin = @cpos_buffer_position - (2 * t)
         if (lmargin < 0)
            lmargin = 0
         end
         # If the left margin would be in the middle of a prompt with
         #   invisible characters, don't display the prompt at all.
         if (@wrap_offset!=0 && lmargin > 0 && lmargin < nleft)
            lmargin = nleft
         end
      elsif (ndisp < @_rl_screenwidth - 2)      # XXX - was -1
         lmargin = 0
      elsif (phys_c_pos < 1)
         # If we are moving back towards the beginning of the line and
         #   the last margin is no longer correct, compute a new one.
         lmargin = ((@cpos_buffer_position - 1) / t) * t # XXX
         if (@wrap_offset!=0 && lmargin > 0 && lmargin < nleft)
            lmargin = nleft
         end
      else
         lmargin = @last_lmargin
      end

      # If the first character on the screen isn't the first character
      #in the display line, indicate this with a special character.
      if (lmargin > 0)
         line[lmargin] = '<'
      end

      # If SCREENWIDTH characters starting at LMARGIN do not encompass
      # the whole line, indicate that with a special character at the
      # right edge of the screen.  If LMARGIN is 0, we need to take the
      # wrap offset into account.
      t = lmargin + m_offset(lmargin, @wrap_offset) + @_rl_screenwidth
      if (t < out)
         line[t - 1] = '>'
      end
      if (!@rl_display_fixed || @forced_display || lmargin != @last_lmargin)

         @forced_display = false
         update_line(@visible_line,@last_lmargin,@invisible_line[lmargin..-1],
         0,
         @_rl_screenwidth + @visible_wrap_offset,
         @_rl_screenwidth + (lmargin ? 0 : @wrap_offset),
         0)
         # If the visible new line is shorter than the old, but the number
         #   of invisible characters is greater, and we are at the end of
         #   the new line, we need to clear to eol.
         t = @_rl_last_c_pos - m_offset(lmargin, @wrap_offset)
         if ((m_offset(lmargin, @wrap_offset) > @visible_wrap_offset) &&
            (@_rl_last_c_pos == out) &&
            t < @visible_first_line_len)

            nleft = @_rl_screenwidth - t
            _rl_clear_to_eol(nleft)
         end
         @visible_first_line_len = out - lmargin - m_offset(lmargin, @wrap_offset)
         if (@visible_first_line_len > @_rl_screenwidth)
            @visible_first_line_len = @_rl_screenwidth
         end
         _rl_move_cursor_relative(@cpos_buffer_position - lmargin, @invisible_line ,lmargin)
         @last_lmargin = lmargin
      end
   end
   @rl_outstream.flush

   # Swap visible and non-visible lines.
   @visible_line,@invisible_line = @invisible_line,@visible_line
   @vis_lbreaks,@inv_lbreaks = @inv_lbreaks,@vis_lbreaks

   @rl_display_fixed = false
   # If we are displaying on a single line, and last_lmargin is > 0, we
   #   are not displaying any invisible characters, so set visible_wrap_offset
   #   to 0.
   if (@_rl_horizontal_scroll_mode && @last_lmargin!=0)
      @visible_wrap_offset = 0
   else
      @visible_wrap_offset = @wrap_offset
   end
end

.rl_refresh_line(ignore1, ignore2) ⇒ Object

Clear the current line. Numeric argument to C-l does this.



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# File 'lib/rbreadline.rb', line 5201

def rl_refresh_line(ignore1, ignore2)
   curr_line = _rl_current_display_line()

   _rl_move_vert(curr_line)
   _rl_move_cursor_relative(0, @rl_line_buffer)   # XXX is this right

   _rl_clear_to_eol(0)     # arg of 0 means to not use spaces

   rl_forced_update_display()
   @rl_display_fixed = true

   0
end

.rl_replace_from_history(entry, flags) ⇒ Object 



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# File 'lib/rbreadline.rb', line 6765

def rl_replace_from_history(entry, flags)
   # Can't call with `1' because rl_undo_list might point to an undo list
   #   from a history entry, just like we're setting up here.
   rl_replace_line(entry.line, false)
   @rl_undo_list = entry.data
   @rl_point = @rl_end
   @rl_mark = 0

   if (@rl_editing_mode == @vi_mode)
      @rl_point = 0
      @rl_mark = @rl_end
   end
end

.rl_replace_line(text, clear_undo) ⇒ Object

Replace the current line buffer contents with TEXT. If CLEAR_UNDO is

non-zero, we free the current undo list.



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# File 'lib/rbreadline.rb', line 4894

def rl_replace_line(text, clear_undo)
   len = text.delete(0.chr).length
   @rl_line_buffer = text.dup + 0.chr
   @rl_end = len
   if (clear_undo)
      rl_free_undo_list()
   end
   _rl_fix_point(true)
end

.rl_reset_line_state ⇒ Object 



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# File 'lib/rbreadline.rb', line 3708

def rl_reset_line_state()
   rl_on_new_line()

   @rl_display_prompt = @rl_prompt ? @rl_prompt : ""
   @forced_display = true
   0
end

.rl_resize_terminal ⇒ Object 



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# File 'lib/rbreadline.rb', line 8627

def rl_resize_terminal()
   if @readline_echoing_p
      _rl_get_screen_size(@rl_instream.fileno, 1)
      if @rl_redisplay_function != :rl_redisplay
         rl_forced_update_display()
      else
         _rl_redisplay_after_sigwinch()
      end
   end
end

.rl_restart_output(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1634

def rl_restart_output(count, key)
   0
end

.rl_restore_prompt ⇒ Object 



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# File 'lib/rbreadline.rb', line 7168

def rl_restore_prompt()
   @local_prompt = nil
   @local_prompt_prefix = nil

   @local_prompt = @saved_local_prompt
   @local_prompt_prefix = @saved_local_prefix
   @local_prompt_len = @saved_local_length
   @prompt_prefix_length = @saved_prefix_length
   @prompt_last_invisible = @saved_last_invisible
   @prompt_visible_length = @saved_visible_length
   @prompt_invis_chars_first_line = @saved_invis_chars_first_line
   @prompt_physical_chars = @saved_physical_chars

   # can test saved_local_prompt to see if prompt info has been saved.
   @saved_local_prompt = @saved_local_prefix = nil
   @saved_local_length = 0
   @saved_last_invisible = @saved_visible_length = @saved_prefix_length = 0
   @saved_invis_chars_first_line = @saved_physical_chars = 0
end

.rl_reverse_search_history(sign, key) ⇒ Object

Search backwards through the history looking for a string which is typed

interactively.  Start with the current line.



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# File 'lib/rbreadline.rb', line 7015

def rl_reverse_search_history(sign, key)
   rl_search_history(-sign, key)
end

.rl_revert_line(count, key) ⇒ Object

Revert the current line to its previous state.



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# File 'lib/rbreadline.rb', line 7557

def rl_revert_line(count, key)
   if @rl_undo_list.nil?
      rl_ding()
   else
      while (@rl_undo_list)
         rl_do_undo()
      end
      if (@rl_editing_mode == @vi_mode)
         @rl_point = @rl_mark = 0      # rl_end should be set correctly
      end
   end
   0
end

.rl_rubout(count, key) ⇒ Object

Rubout the character behind point.



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# File 'lib/rbreadline.rb', line 5695

def rl_rubout(count, key)
   if (count < 0)
      return (rl_delete(-count, key))
   end
   if (@rl_point==0)
      rl_ding()
      return -1
   end

   if (@rl_insert_mode == RL_IM_OVERWRITE)
      return (_rl_overwrite_rubout(count, key))
   end
   _rl_rubout_char(count, key)
end

.rl_rubout_or_delete(count, key) ⇒ Object

Delete the character under the cursor, unless the insertion

point is at the end of the line, in which case the character
behind the cursor is deleted.  COUNT is obeyed and may be used
to delete forward or backward that many characters.



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# File 'lib/rbreadline.rb', line 5916

def rl_rubout_or_delete(count, key)
   if (@rl_end != 0 && @rl_point == @rl_end)
      return (_rl_rubout_char(count, key))
   else
      return (rl_delete(count, key))
   end
end

.rl_save_prompt ⇒ Object 



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# File 'lib/rbreadline.rb', line 7152

def rl_save_prompt()
   @saved_local_prompt = @local_prompt
   @saved_local_prefix = @local_prompt_prefix
   @saved_prefix_length = @prompt_prefix_length
   @saved_local_length = @local_prompt_len
   @saved_last_invisible = @prompt_last_invisible
   @saved_visible_length = @prompt_visible_length
   @saved_invis_chars_first_line = @prompt_invis_chars_first_line
   @saved_physical_chars = @prompt_physical_chars

   @local_prompt = @local_prompt_prefix = nil
   @local_prompt_len = 0
   @prompt_last_invisible = @prompt_visible_length = @prompt_prefix_length = 0
   @prompt_invis_chars_first_line = @prompt_physical_chars = 0
end

.rl_search_history(direction, invoking_key) ⇒ Object

Search through the history looking for an interactively typed string.

This is analogous to i-search.  We start the search in the current line.
DIRECTION is which direction to search; >= 0 means forward, < 0 means
backwards.



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# File 'lib/rbreadline.rb', line 7029

def rl_search_history(direction, invoking_key)
   rl_setstate(RL_STATE_ISEARCH)
   cxt = _rl_isearch_init(direction)

   rl_display_search(cxt.search_string, (cxt.sflags & SF_REVERSE)!=0, -1)

   # If we are using the callback interface, all we do is set up here and
   #    return.  The key is that we leave RL_STATE_ISEARCH set.
   if (rl_isstate(RL_STATE_CALLBACK))
      return (0)
   end

   r = -1
   while(true)
      c = _rl_search_getchar(cxt)
      # We might want to handle EOF here (c == 0)
      r = _rl_isearch_dispatch(cxt, cxt.lastc)
      break if (r <= 0)
   end

   # The searching is over.  The user may have found the string that she
   #   was looking for, or else she may have exited a failing search.  If
   #   LINE_INDEX is -1, then that shows that the string searched for was
   #   not found.  We use this to determine where to place rl_point.
   _rl_isearch_cleanup(cxt, r)
end

.rl_set_keymap_from_edit_mode ⇒ Object 



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# File 'lib/rbreadline.rb', line 2411

def rl_set_keymap_from_edit_mode()
   if (@rl_editing_mode == @emacs_mode)
      @_rl_keymap = @emacs_standard_keymap
   elsif (@rl_editing_mode == @vi_mode)
      @_rl_keymap = @vi_insertion_keymap
   end
end

.rl_set_mark(count, key) ⇒ Object

A bindable command to set the mark.



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# File 'lib/rbreadline.rb', line 6958

def rl_set_mark(count, key)
   _rl_set_mark_at_pos(@rl_explicit_arg ? count : @rl_point)
end

.rl_set_prompt(prompt) ⇒ Object

Set up the prompt and expand it. Called from readline() and

rl_callback_handler_install ().



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# File 'lib/rbreadline.rb', line 1787

def rl_set_prompt(prompt)
   @rl_prompt = prompt ? prompt.dup : nil
   @rl_display_prompt = @rl_prompt ? @rl_prompt : ""
   @rl_visible_prompt_length = rl_expand_prompt(@rl_prompt)
   0
end

.rl_set_signals ⇒ Object 



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# File 'lib/rbreadline.rb', line 1644

def rl_set_signals()
   if Signal.list['WINCH']
      @def_proc = trap "WINCH",Proc.new{rl_sigwinch_handler(0)}
   end
end

.rl_setstate(x) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1615

def rl_setstate(x)
   (@rl_readline_state |= (x))
end

.rl_sigwinch_handler(sig) ⇒ Object 



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# File 'lib/rbreadline.rb', line 8638

def rl_sigwinch_handler(sig)
   rl_setstate(RL_STATE_SIGHANDLER)
   rl_resize_terminal()
   rl_unsetstate(RL_STATE_SIGHANDLER)
end

.rl_stuff_char(key) ⇒ Object

Add KEY to the buffer of characters to be read. Returns 1 if the

character was stuffed correctly; 0 otherwise.



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# File 'lib/rbreadline.rb', line 4258

def rl_stuff_char(key)
   return 0 if (ibuffer_space() == 0)

   if (key == EOF)
      key = NEWLINE
      @rl_pending_input = EOF
      rl_setstate(RL_STATE_INPUTPENDING)
   end
   @ibuffer[@push_index] = key
   @push_index += 1
   if (@push_index >= @ibuffer_len)
      @push_index = 0
   end

   return 1
end

.rl_tab_insert(count, key) ⇒ Object

Insert a tab character.



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# File 'lib/rbreadline.rb', line 5525

def rl_tab_insert(count, key)
   _rl_insert_char(count, "\t")
end

.rl_tilde_expand(ignore, key) ⇒ Object

A function for simple tilde expansion.



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# File 'lib/rbreadline.rb', line 1450

def rl_tilde_expand(ignore, key)
   _end = @rl_point
   start = _end - 1

   if (@rl_point == @rl_end && @rl_line_buffer[@rl_point] == ?~ )
      homedir = File.expand_path("~")
      _rl_replace_text(homedir, start, _end)
      return (0)
   elsif (@rl_line_buffer[start] != ?~)
      while(!whitespace(@rl_line_buffer[start,1]) && start >= 0)
         start -= 1
      end
      start+=1
   end

   _end = start
   begin
      _end+=1
   end while(!whitespace(@rl_line_buffer[_end,1]) && _end < @rl_end)

   if (whitespace(@rl_line_buffer[_end,1]) || _end >= @rl_end)
      _end-=1
   end

   # If the first character of the current word is a tilde, perform
   #tilde expansion and insert the result.  If not a tilde, do
   #   nothing.
   if (@rl_line_buffer[start] == ?~)

      len = _end - start + 1
      temp = @rl_line_buffer[start,len]
      homedir = File.expand_path(temp)
      temp = nil

      _rl_replace_text(homedir, start, _end)
   end
   0
end

.rl_transpose_chars(count, key) ⇒ Object

Transpose the characters at point. If point is at the end of the line,

then transpose the characters before point.



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# File 'lib/rbreadline.rb', line 7226

def rl_transpose_chars(count, key)
   return 0 if (count == 0)

   if (@rl_point==0 || @rl_end < 2)
      rl_ding()
      return -1
   end

   rl_begin_undo_group()

   if (@rl_point == @rl_end)
      if !@rl_byte_oriented
         @rl_point = _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO)
      else
         @rl_point -= 1
      end
      count = 1
   end

   prev_point = @rl_point
   if !@rl_byte_oriented
      @rl_point = _rl_find_prev_mbchar(@rl_line_buffer, @rl_point, MB_FIND_NONZERO)
   else
      @rl_point -= 1
   end

   char_length = prev_point - @rl_point
   dummy = @rl_line_buffer[@rl_point,char_length]

   rl_delete_text(@rl_point, @rl_point + char_length)

   @rl_point += count
   _rl_fix_point(0)
   rl_insert_text(dummy)
   rl_end_undo_group()
   dummy = nil
   0
end

.rl_transpose_words(count, key) ⇒ Object

Transpose the words at point. If point is at the end of the line,

transpose the two words before point.



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# File 'lib/rbreadline.rb', line 8093

def rl_transpose_words(count, key)
   orig_point = @rl_point

   return if (count==0)

   # Find the two words.
   rl_forward_word(count, key)
   w2_end = @rl_point
   rl_backward_word(1, key)
   w2_beg = @rl_point
   rl_backward_word(count, key)
   w1_beg = @rl_point
   rl_forward_word(1, key)
   w1_end = @rl_point

   # Do some check to make sure that there really are two words.
   if ((w1_beg == w2_beg) || (w2_beg < w1_end))
      rl_ding()
      @rl_point = orig_point
      return -1
   end

   # Get the text of the words.
   word1 = rl_copy_text(w1_beg, w1_end)
   word2 = rl_copy_text(w2_beg, w2_end)

   # We are about to do many insertions and deletions.  Remember them
   #   as one operation.
   rl_begin_undo_group()

   # Do the stuff at word2 first, so that we don't have to worry
   #   about word1 moving.
   @rl_point = w2_beg
   rl_delete_text(w2_beg, w2_end)
   rl_insert_text(word1)

   @rl_point = w1_beg
   rl_delete_text(w1_beg, w1_end)
   rl_insert_text(word2)

   # This is exactly correct since the text before this point has not
   #   changed in length.
   @rl_point = w2_end

   # I think that does it.
   rl_end_undo_group()
   word1 = nil
   word2 = nil

   0
end

.rl_tty_set_default_bindings(kmap) ⇒ Object

New public way to set the system default editing chars to their readline

equivalents.



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# File 'lib/rbreadline.rb', line 2042

def rl_tty_set_default_bindings(kmap)
   h = Hash[*`stty -a`.scan(/(\w+) = ([^;]+);/).flatten]
   h.each {|k,v| v.gsub!(/\^(.)/){($1[0].ord ^ ((?a..?z).include?($1[0]) ? 0x60 : 0x40)).chr}}
   kmap[h['erase']] = :rl_rubout
   kmap[h['kill']] = :rl_unix_line_discard
   kmap[h['werase']] = :rl_unix_word_rubout
   kmap[h['lnext']] = :rl_quoted_insert
end

.rl_tty_unset_default_bindings(kmap) ⇒ Object

Rebind all of the tty special chars that readline worries about back

to self-insert.  Call this before saving the current terminal special
chars with save_tty_chars().  This only works on POSIX termios or termio
systems.



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# File 'lib/rbreadline.rb', line 6870

def rl_tty_unset_default_bindings(kmap)
   # Don't bother before we've saved the tty special chars at least once.
   return if (!rl_isstate(RL_STATE_TTYCSAVED))

   kmap[@_rl_tty_chars.t_erase] = :rl_insert
   kmap[@_rl_tty_chars.t_kill] = :rl_insert
   kmap[@_rl_tty_chars.t_lnext] = :rl_insert
   kmap[@_rl_tty_chars.t_werase] = :rl_insert
end

.rl_undo_command(count, key) ⇒ Object

Do some undoing of things that were done.



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# File 'lib/rbreadline.rb', line 7504

def rl_undo_command(count, key)
   if (count < 0)
      return 0 # Nothing to do.
   end
   while (count>0)
      if (rl_do_undo())
         count-=1
      else
         rl_ding()
         break
      end
   end
   0
end

.rl_unix_filename_rubout(count, key) ⇒ Object

This deletes one filename component in a Unix pathname. That is, it

deletes backward to directory separator (`/') or whitespace.



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# File 'lib/rbreadline.rb', line 5880

def rl_unix_filename_rubout(count, key)
   if (@rl_point == 0)
      rl_ding()
   else
      orig_point = @rl_point
      if (count <= 0)
         count = 1
      end

      while (count>0)

         c = @rl_line_buffer[@rl_point - 1,1]
         while (@rl_point>0 && (whitespace(c) || c == '/'))
            @rl_point-=1
            c = @rl_line_buffer[@rl_point - 1,1]
         end

         while (@rl_point>0 && !whitespace(c) && c != '/')
            @rl_point-=1
            c = @rl_line_buffer[@rl_point - 1,1]
         end
         count -= 1
      end

      rl_kill_text(orig_point, @rl_point)
      if (@rl_editing_mode == @emacs_mode)
         @rl_mark = @rl_point
      end
   end
   0
end

.rl_unix_line_discard(count, key) ⇒ Object

Here is C-u doing what Unix does. You don’t have to use these key-bindings. We have a choice of killing the entire line, or killing from where we are to the start of the line. We choose the latter, because if you are a Unix weenie, then you haven’t backspaced into the line at all, and if you aren’t, then you know what you are doing.



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# File 'lib/rbreadline.rb', line 7271

def rl_unix_line_discard(count, key)
   if (@rl_point == 0)
      rl_ding()
   else
      rl_kill_text(@rl_point, 0)
      @rl_point = 0
      if (@rl_editing_mode == @emacs_mode)
         @rl_mark = @rl_point
      end
   end
   0
end

.rl_unix_word_rubout(count, key) ⇒ Object

This does what C-w does in Unix. We can’t prevent people from

using behaviour that they expect.



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# File 'lib/rbreadline.rb', line 5850

def rl_unix_word_rubout(count, key)
   if (@rl_point == 0)
      rl_ding()
   else
      orig_point = @rl_point
      if (count <= 0)
         count = 1
      end

      while (count>0)
         while (@rl_point>0 && whitespace(@rl_line_buffer[@rl_point - 1,1]))
            @rl_point-=1
         end

         while (@rl_point>0 && !whitespace(@rl_line_buffer[@rl_point - 1,1]))
            @rl_point-=1
         end
         count -= 1
      end

      rl_kill_text(orig_point, @rl_point)
      if (@rl_editing_mode == @emacs_mode)
         @rl_mark = @rl_point
      end
   end
   0
end

.rl_unsetstate(x) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1619

def rl_unsetstate(x)
   (@rl_readline_state &= ~(x))
end

.rl_upcase_word(count, key) ⇒ Object

Uppercase the word at point.



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# File 'lib/rbreadline.rb', line 7716

def rl_upcase_word(count, key)
   rl_change_case(count, UpCase)
end

.rl_username_completion_function(text, state) ⇒ Object

A completion function for usernames.

TEXT contains a partial username preceded by a random
character (usually `~').



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# File 'lib/rbreadline.rb', line 1222

def rl_username_completion_function(text, state)
   return nil if RUBY_PLATFORM =~ /mswin|mingw/

   if (state == 0)
      first_char = text[0]
      first_char_loc = (text[0] == ?~ ? 1 : 0)

      username = text[first_char_loc..-1]
      namelen = username.length
      Etc.setpwent()
   end

   while (entry = Etc.getpwent())
      # Null usernames should result in all users as possible completions.
      break if (namelen == 0 || entry.name =~ /^#{username}/ )
   end

   if entry.nil?
      Etc.endpwent()
      return nil
   else
      value = text.dup
      value[first_char_loc..-1] = entry.name

      if (first_char == ?~)
         @rl_filename_completion_desired = true
      end

      return (value)
   end
end

.rl_variable_bind(name, value) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2237

def rl_variable_bind(name,value)
   case name
   when "bind-tty-special-chars"
      @_rl_bind_stty_chars = value.nil? || value=='1' || value == 'on'
   when "blink-matching-paren"
      @rl_blink_matching_paren = value.nil? || value=='1' || value == 'on'
   when "byte-oriented"
      @rl_byte_oriented = value.nil? || value=='1' || value == 'on'
   when "completion-ignore-case"
      @_rl_completion_case_fold = value.nil? || value=='1' || value == 'on'
   when "convert-meta"
      @_rl_convert_meta_chars_to_ascii = value.nil? || value=='1' || value == 'on'
   when "disable-completion"
      @rl_inhibit_completion = value.nil? || value=='1' || value == 'on'
   when "enable-keypad"
      @_rl_enable_keypad = value.nil? || value=='1' || value == 'on'
   when "expand-tilde"
      @rl_complete_with_tilde_expansion = value.nil? || value=='1' || value == 'on'
   when "history-preserve-point"
      @_rl_history_preserve_point = value.nil? || value=='1' || value == 'on'
   when "horizontal-scroll-mode"
      @_rl_horizontal_scroll_mode = value.nil? || value=='1' || value == 'on'
   when "input-meta"
      @_rl_meta_flag = value.nil? || value=='1' || value == 'on'
   when "mark-directories"
      @_rl_complete_mark_directories = value.nil? || value=='1' || value == 'on'
   when "mark-modified-lines"
      @_rl_mark_modified_lines = value.nil? || value=='1' || value == 'on'
   when "mark-symlinked-directories"
      @_rl_complete_mark_symlink_dirs = value.nil? || value=='1' || value == 'on'
   when "match-hidden-files"
      @_rl_match_hidden_files = value.nil? || value=='1' || value == 'on'
   when "meta-flag"
      @_rl_meta_flag = value.nil? || value=='1' || value == 'on'
   when "output-meta"
      @_rl_output_meta_chars = value.nil? || value=='1' || value == 'on'
   when "page-completions"
      @_rl_page_completions = value.nil? || value=='1' || value == 'on'
   when "prefer-visible-bell"
      @_rl_prefer_visible_bell = value.nil? || value=='1' || value == 'on'
   when "print-completions-horizontally"
      @_rl_print_completions_horizontally = value.nil? || value=='1' || value == 'on'
   when "show-all-if-ambiguous"
      @_rl_complete_show_all = value.nil? || value=='1' || value == 'on'
   when "show-all-if-unmodified"
      @_rl_complete_show_unmodified = value.nil? || value=='1' || value == 'on'
   when "visible-stats"
      @rl_visible_stats = value.nil? || value=='1' || value == 'on'
   when "bell-style"
      case value
      when "none","off"
         @_rl_bell_preference = NO_BELL
      when "audible", "on"
         @_rl_bell_preference = AUDIBLE_BELL
      when "visible"
         @_rl_bell_preference = VISIBLE_BELL
      else
         @_rl_bell_preference = AUDIBLE_BELL
      end
   when "comment-begin"
      @_rl_comment_begin = value.dup
   when "completion-query-items"
      @rl_completion_query_items = value.to_i
   when "editing-mode"
      case value
      when "vi"
         @_rl_keymap = @vi_insertion_keymap
         @rl_editing_mode = @vi_mode
      when "emacs"
         @_rl_keymap = @emacs_standard_keymap
         @rl_editing_mode = @emacs_mode
      end
   when "isearch-terminators"
      @_rl_isearch_terminators = instance_eval(value)
   when "keymap"
      case value
      when "emacs","emacs-standard","emacs-meta","emacs-ctlx"
         @_rl_keymap = @emacs_standard_keymap
      when "vi","vi-move","vi-command"
         @_rl_keymap = @vi_movement_keymap
      when "vi-insert"
         @_rl_keymap = @vi_insertion_keymap
      end
   end
end

.rl_vi_check ⇒ Object 



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# File 'lib/rbreadline.rb', line 4668

def rl_vi_check()
   if (@rl_point!=0 && @rl_point == @rl_end)
      @rl_point-=1
   end
   0
end

.rl_vi_editing_mode(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1408

def rl_vi_editing_mode(count, key)
   _rl_set_insert_mode(RL_IM_INSERT, 1)    # vi mode ignores insert mode
   @rl_editing_mode = @vi_mode
   rl_vi_insertion_mode(1, key)
   0
end

.rl_vi_insertion_mode(count, key) ⇒ Object

Switching from one mode to the other really just involves

switching keymaps.



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# File 'lib/rbreadline.rb', line 1417

def rl_vi_insertion_mode(count, key)
   @_rl_keymap = @vi_insertion_keymap
   @_rl_vi_last_key_before_insert = key
   0
end

.rl_yank(count, ignore) ⇒ Object

Yank back the last killed text. This ignores arguments.



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# File 'lib/rbreadline.rb', line 7285

def rl_yank(count, ignore)
   if @rl_kill_ring.nil?
      _rl_abort_internal()
      return -1
   end
   _rl_set_mark_at_pos(@rl_point)
   rl_insert_text(@rl_kill_ring[@rl_kill_index])
   0
end

.rl_yank_last_arg(count, key) ⇒ Object 



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# File 'lib/rbreadline.rb', line 7375

def rl_yank_last_arg(count, key)
   if (@rl_last_func != :rl_yank_last_arg)
      @history_skip = 0
      @explicit_arg_p = @rl_explicit_arg
      @count_passed = count
      @direction = 1
   else
      if (@undo_needed)
         rl_do_undo()
      end
      if (count < 1)
         @direction = -@direction
      end
      @history_skip += @direction
      if (@history_skip < 0)
         @history_skip = 0
      end
   end

   if (@explicit_arg_p)
      retval = rl_yank_nth_arg_internal(@count_passed, key, @history_skip)
   else
      retval = rl_yank_nth_arg_internal('$', key, @history_skip)
   end
   @undo_needed = retval == 0
   retval
end

.rl_yank_nth_arg(count, ignore) ⇒ Object

Yank the COUNTth argument from the previous history line.



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# File 'lib/rbreadline.rb', line 7362

def rl_yank_nth_arg(count, ignore)
   rl_yank_nth_arg_internal(count, ignore, 0)
end

.rl_yank_nth_arg_internal(count, ignore, history_skip) ⇒ Object

Yank the COUNTh argument from the previous history line, skipping

HISTORY_SKIP lines before looking for the `previous line'.



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# File 'lib/rbreadline.rb', line 7325

def rl_yank_nth_arg_internal(count, ignore, history_skip)
   pos = where_history()
   if (history_skip>0)
      history_skip.times { entry = previous_history() }
   end
   entry = previous_history()
   history_set_pos(pos)
   if entry.nil?
      rl_ding()
      return -1
   end

   arg = history_arg_extract(count, count, entry.line)
   if (arg.nil? || arg=='')
      rl_ding()
      arg = nil
      return -1
   end

   rl_begin_undo_group()

   _rl_set_mark_at_pos(@rl_point)

   # Vi mode always inserts a space before yanking the argument, and it
   #   inserts it right *after* rl_point.
   if (@rl_editing_mode == @vi_mode)
      rl_vi_append_mode(1, ignore)
      rl_insert_text(" ")
   end

   rl_insert_text(arg)
   arg = nil
   rl_end_undo_group()
   return 0
end

.rl_yank_pop(count, key) ⇒ Object

If the last command was yank, or yank_pop, and the text just

before point is identical to the current kill item, then
delete that text from the line, rotate the index down, and
yank back some other text.



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# File 'lib/rbreadline.rb', line 7299

def rl_yank_pop(count, key)
   if (((@rl_last_func != :rl_yank_pop) && (@rl_last_func != :rl_yank)) ||
      @rl_kill_ring.nil?)
      _rl_abort_internal()
      return -1
   end

   l = @rl_kill_ring[@rl_kill_index].length
   n = @rl_point - l
   if (n >= 0 && @rl_line_buffer[n,l] == @rl_kill_ring[@rl_kill_index][0,l])
      rl_delete_text(n, @rl_point)
      @rl_point = n
      @rl_kill_index-=1
      if (@rl_kill_index < 0)
         @rl_kill_index = @rl_kill_ring_length - 1
      end
      rl_yank(1, 0)
      return 0
   else
      _rl_abort_internal()
      return -1
   end
end

.save_tty_chars ⇒ Object 



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# File 'lib/rbreadline.rb', line 6804

def save_tty_chars()
   @_rl_last_tty_chars = @_rl_tty_chars
   h = Hash[*`stty -a`.scan(/(\w+) = ([^;]+);/).flatten]
   h.each {|k,v| v.gsub!(/\^(.)/){($1[0].ord ^ ((?a..?z).include?($1[0]) ? 0x60 : 0x40)).chr}}
   @_rl_tty_chars.t_erase = h['erase']
   @_rl_tty_chars.t_kill = h['kill']
   @_rl_tty_chars.t_intr = h['intr']
   @_rl_tty_chars.t_quit = h['quit']
   @_rl_tty_chars.t_start = h['start']
   @_rl_tty_chars.t_stop = h['stop']
   @_rl_tty_chars.t_eof = h['eof']
   @_rl_tty_chars.t_eol = "\n"
   @_rl_tty_chars.t_eol2 = h['eol2']
   @_rl_tty_chars.t_susp = h['susp']
   @_rl_tty_chars.t_dsusp = h['dsusp']
   @_rl_tty_chars.t_reprint = h['rprnt']
   @_rl_tty_chars.t_flush = h['flush']
   @_rl_tty_chars.t_werase = h['werase']
   @_rl_tty_chars.t_lnext = h['lnext']
   @_rl_tty_chars.t_status = -1
   @otio = `stty -g`
end

.set_completion_defaults(what_to_do) ⇒ Object

Set default values for readline word completion. These are the variables

that application completion functions can change or inspect.



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# File 'lib/rbreadline.rb', line 6029

def set_completion_defaults(what_to_do)
   # Only the completion entry function can change these.
   @rl_filename_completion_desired = false
   @rl_filename_quoting_desired = true
   @rl_completion_type = what_to_do
   @rl_completion_suppress_append = @rl_completion_suppress_quote = false

   # The completion entry function may optionally change this.
   @rl_completion_mark_symlink_dirs = @_rl_complete_mark_symlink_dirs
end

.sh_set_lines_and_columns(lines, cols) ⇒ Object

Set the environment variables LINES and COLUMNS to lines and cols,

respectively.



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# File 'lib/rbreadline.rb', line 1831

def sh_set_lines_and_columns(lines, cols)
   ENV["LINES"] = lines.to_s
   ENV["COLUMNS"] = cols.to_s
end

.space_to_eol(count) ⇒ Object

Clear to the end of the line using spaces. COUNT is the minimum

number of character spaces to clear,



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# File 'lib/rbreadline.rb', line 4512

def space_to_eol(count)
   if @hConsoleHandle
      csbi = 0.chr * 24
      @GetConsoleScreenBufferInfo.Call(@hConsoleHandle,csbi)
      cursor_pos = csbi[4,4].unpack('L').first
      written = 0.chr * 4
      @FillConsoleOutputCharacter.Call(@hConsoleHandle,0x20,count,cursor_pos,written)
   else
      @rl_outstream.write(' ' * count)
   end
   @_rl_last_c_pos += count
end

.stat_char(filename) ⇒ Object

Return the character which best describes FILENAME.

`@' for symbolic links
`/' for directories
`*' for executables
`=' for sockets
`|' for FIFOs
`%' for character special devices
`#' for block special devices



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# File 'lib/rbreadline.rb', line 6415

def stat_char(filename)
   return nil if !File.exists?(filename)

   return '/' if File.directory?(filename)
   return '%' if File.chardev?(filename)
   return '#' if File.blockdev?(filename)
   return '@' if File.symlink?(filename)
   return '=' if File.socket?(filename)
   return '|' if File.pipe?(filename)
   return '*' if File.executable?(filename)
   nil
end

.stifle_history(max) ⇒ Object

Stifle the history list, remembering only MAX number of lines.



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# File 'lib/rbreadline.rb', line 8308

def stifle_history(max)
   max = 0 if (max < 0)

   if (@history_length > max)
      @the_history.slice!(0,(@history_length - max))
      @history_length = max
   end

   @history_stifled = true
   @max_input_history = @history_max_entries = max
end

.tgetflag(name) ⇒ Object 



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# File 'lib/rbreadline.rb', line 1879

def tgetflag(name)
   `infocmp -C -r`.scan(/\w{2}/).include?(name)
end

.trans(i) ⇒ Object

Undo the next thing in the list. Return 0 if there

is nothing to undo, or non-zero if there was.



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# File 'lib/rbreadline.rb', line 7447

def trans(i)
   ((i) == -1 ? @rl_point : ((i) == -2 ? @rl_end : (i)))
end

.unstifle_history ⇒ Object

Stop stifling the history. This returns the previous maximum

number of history entries.  The value is positive if the history
was stifled,  negative if it wasn't.



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# File 'lib/rbreadline.rb', line 8323

def unstifle_history()
   if (@history_stifled)
      @history_stifled = false
      return (@history_max_entries)
   else
      return (-@history_max_entries)
   end
end

.update_line(old, ostart, new, current_line, omax, nmax, inv_botlin) ⇒ Object

PWP: update_line() is based on finding the middle difference of each

 line on the screen; vis:

           /old first difference
/beginning of line   |        /old last same       /old EOL
v          v         v         v

old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as new: eddie> Oh, my little buggy says to me, as lurgid as

^          ^   ^           ^
\beginning of line   |  \new last same    \new end of line
           \new first difference

 All are character pointers for the sake of speed.  Special cases for
 no differences, as well as for end of line additions must be handled.

 Could be made even smarter, but this works well enough



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# File 'lib/rbreadline.rb', line 2656

def update_line(old, ostart, new, current_line, omax, nmax, inv_botlin)
   # If we're at the right edge of a terminal that supports xn, we're
   #   ready to wrap around, so do so.  This fixes problems with knowing
   #   the exact cursor position and cut-and-paste with certain terminal
   #   emulators.  In this calculation, TEMP is the physical screen
   #   position of the cursor.
   if @encoding == 'X'
      old.force_encoding('ASCII-8BIT')
      new.force_encoding('ASCII-8BIT')
   end

   if !@rl_byte_oriented
      temp = @_rl_last_c_pos
   else
      temp = @_rl_last_c_pos - w_offset(@_rl_last_v_pos, @visible_wrap_offset)
   end
   if (temp == @_rl_screenwidth && @_rl_term_autowrap && !@_rl_horizontal_scroll_mode &&
      @_rl_last_v_pos == current_line - 1)

      if (!@rl_byte_oriented)
         # This fixes only double-column characters, but if the wrapped
         #   character comsumes more than three columns, spaces will be
         #   inserted in the string buffer.
         if (@_rl_wrapped_line[current_line] > 0)
            _rl_clear_to_eol(@_rl_wrapped_line[current_line])
         end

         if new[0] != ?\0
            case @encoding
            when 'E'
               wc = new.scan(/./me)[0]
               ret = wc.length
               tempwidth = wc.length
            when 'S'
               wc = new.scan(/./ms)[0]
               ret = wc.length
               tempwidth = wc.length
            when 'U'
               wc = new.scan(/./mu)[0]
               ret = wc.length
               tempwidth = wc.unpack('U').first >= 0x1000 ? 2 : 1
            when 'X'
               wc = new[0..-1].force_encoding(@encoding_name)[0]
               ret = wc.bytesize
               tempwidth = wc.ord >= 0x1000 ? 2 : 1
            else
               ret = 1
               tempwidth = 1
            end
         else
            tempwidth = 0
         end

         if (tempwidth > 0)
            bytes = ret
            @rl_outstream.write(new[0,bytes])
            @_rl_last_c_pos = tempwidth
            @_rl_last_v_pos+=1

            if old[ostart] != ?\0
               case @encoding
               when 'E'
                  wc = old[ostart..-1].scan(/./me)[0]
                  ret = wc.length
               when 'S'
                  wc = old[ostart..-1].scan(/./ms)[0]
                  ret = wc.length
               when 'U'
                  wc = old[ostart..-1].scan(/./mu)[0]
                  ret = wc.length
               when 'X'
                  wc = old[ostart..-1].force_encoding(@encoding_name)[0]
                  ret = wc.bytesize
               end
            else
               ret = 0
            end
            if (ret != 0 && bytes != 0)
               if ret != bytes
                  len = old[ostart..-1].index(0.chr,ret)
                  old[ostart+bytes,len-ret] = old[ostart+ret,len-ret]
               end
               old[ostart,bytes] = new[0,bytes]
            end
         else
            @rl_outstream.write(' ')
            @_rl_last_c_pos = 1
            @_rl_last_v_pos+=1
            if (old[ostart] != ?\0 && new[0] != ?\0)
               old[ostart] = new[0]
            end
         end

      else
         if (new[0] != ?\0)
            @rl_outstream.write(new[0,1])
         else
            @rl_outstream.write(' ')
         end
         @_rl_last_c_pos = 1
         @_rl_last_v_pos+=1
         if (old[ostart]!= ?\0 && new[0] != ?\0)
            old[ostart] = new[0]
         end
      end
   end

   # Find first difference.
   if (!@rl_byte_oriented)
      # See if the old line is a subset of the new line, so that the
      # only change is adding characters.
      if (index = old.index(0.chr)) && omax+ostart>index
         omax = index - ostart
      end
      if (index = new.index(0.chr)) && nmax>index
         nmax = index
      end

      temp = (omax < nmax) ? omax : nmax
      if old[ostart,temp]==new[0,temp]
         ofd = temp
         nfd = temp
      else
         if (omax == nmax && new[0,omax]==old[ostart,omax])
            ofd = omax
            nfd = nmax
         else
            new_offset = 0
            old_offset = ostart
            ofd = 0
            nfd = 0
            while(ofd < omax && old[ostart+ofd] != ?\0 &&
               _rl_compare_chars(old, old_offset, new, new_offset))

               old_offset = _rl_find_next_mbchar(old, old_offset, 1, MB_FIND_ANY)
               new_offset = _rl_find_next_mbchar(new, new_offset, 1, MB_FIND_ANY)
               ofd = old_offset - ostart
               nfd = new_offset
            end
         end
      end
   else
      ofd = 0
      nfd = 0
      while(ofd < omax && old[ostart+ofd] != ?\0 && old[ostart+ofd] == new[nfd])
         ofd += 1
         nfd += 1
      end
   end


   # Move to the end of the screen line.  ND and OD are used to keep track
   #   of the distance between ne and new and oe and old, respectively, to
   #   move a subtraction out of each loop.
   oe = old.index(0.chr,ostart+ofd) - ostart
   if oe.nil? || oe>omax
      oe = omax
   end

   ne = new.index(0.chr,nfd)
   if ne.nil? || ne>omax
      ne = nmax
   end

   # If no difference, continue to next line.
   if (ofd == oe && nfd == ne)
      return
   end


   wsatend = true       # flag for trailing whitespace

   if (!@rl_byte_oriented)

      ols = _rl_find_prev_mbchar(old, ostart+oe, MB_FIND_ANY) - ostart
      nls = _rl_find_prev_mbchar(new, ne, MB_FIND_ANY)
      while ((ols > ofd) && (nls > nfd))

         if (!_rl_compare_chars(old, ostart+ols, new, nls))
            break
         end
         if (old[ostart+ols] == ?\x20)
            wsatend = false
         end

         ols = _rl_find_prev_mbchar(old, ols+ostart, MB_FIND_ANY) - ostart
         nls = _rl_find_prev_mbchar(new, nls, MB_FIND_ANY)
      end
   else
      ols = oe - 1         # find last same
      nls = ne - 1
      while ((ols > ofd) && (nls > nfd) && old[ostart+ols] == new[nls])
         if (old[ostart+ols] != ?\x20 )
            wsatend = false
         end
         ols-=1
         nls-=1
      end
   end

   if (wsatend)
      ols = oe
      nls = ne
   elsif (!_rl_compare_chars(old, ostart+ols, new, nls))
      if (old[ostart+ols] != ?\0)         # don't step past the NUL
         if !@rl_byte_oriented
            ols = _rl_find_next_mbchar(old, ostart+ols, 1, MB_FIND_ANY) - ostart
         else
            ols+=1
         end
      end
      if (new[nls] != ?\0 )
         if !@rl_byte_oriented
            nls = _rl_find_next_mbchar(new, nls, 1, MB_FIND_ANY)
         else
            nls+=1
         end
      end
   end

   # count of invisible characters in the current invisible line.
   current_invis_chars = w_offset(current_line, @wrap_offset)
   if (@_rl_last_v_pos != current_line)
      _rl_move_vert(current_line)
      if (@rl_byte_oriented && current_line == 0 && @visible_wrap_offset!=0)
         @_rl_last_c_pos += @visible_wrap_offset
      end
   end

   # If this is the first line and there are invisible characters in the
   #   prompt string, and the prompt string has not changed, and the current
   #   cursor position is before the last invisible character in the prompt,
   #   and the index of the character to move to is past the end of the prompt
   #   string, then redraw the entire prompt string.  We can only do this
   #   reliably if the terminal supports a `cr' capability.

   #  This is not an efficiency hack -- there is a problem with redrawing
   #  portions of the prompt string if they contain terminal escape
   #  sequences (like drawing the `unbold' sequence without a corresponding
   #  `bold') that manifests itself on certain terminals.

   lendiff = @local_prompt_len

   if (current_line == 0 && !@_rl_horizontal_scroll_mode &&
      @_rl_term_cr && lendiff > @prompt_visible_length && @_rl_last_c_pos > 0 &&
      ofd >= lendiff && @_rl_last_c_pos < prompt_ending_index())
      @rl_outstream.write(@_rl_term_cr)
      _rl_output_some_chars(@local_prompt,0,lendiff)
      if !@rl_byte_oriented
         # We take wrap_offset into account here so we can pass correct
         #   information to _rl_move_cursor_relative.
         @_rl_last_c_pos = _rl_col_width(@local_prompt, 0, lendiff) - @wrap_offset
         @cpos_adjusted = true
      else
         @_rl_last_c_pos = lendiff
      end
   end

   # When this function returns, _rl_last_c_pos is correct, and an absolute
   #   cursor postion in multibyte mode, but a buffer index when not in a
   #   multibyte locale.
   _rl_move_cursor_relative(ofd, old, ostart)

   if (current_line == 0 && !@rl_byte_oriented && @_rl_last_c_pos == @prompt_physical_chars)
      @cpos_adjusted = true
   end

   # if (len (new) > len (old))
   #   lendiff == difference in buffer
   #   col_lendiff == difference on screen
   #   When not using multibyte characters, these are equal
   lendiff = (nls - nfd) - (ols - ofd)
   if !@rl_byte_oriented
      col_lendiff = _rl_col_width(new, nfd, nls) - _rl_col_width(old, ostart+ofd, ostart+ols)
   else
      col_lendiff = lendiff
   end

   # If we are changing the number of invisible characters in a line, and
   #   the spot of first difference is before the end of the invisible chars,
   #   lendiff needs to be adjusted.
   if (current_line == 0 && !@_rl_horizontal_scroll_mode &&
      current_invis_chars != @visible_wrap_offset)
      if !@rl_byte_oriented
         lendiff += @visible_wrap_offset - current_invis_chars
         col_lendiff += @visible_wrap_offset - current_invis_chars
      else
         lendiff += @visible_wrap_offset - current_invis_chars
         col_lendiff = lendiff
      end
   end

   # Insert (diff (len (old), len (new)) ch.
   temp = ne - nfd
   if !@rl_byte_oriented
      col_temp = _rl_col_width(new,nfd,ne)
   else
      col_temp = temp
   end
   if (col_lendiff > 0) # XXX - was lendiff

      # Non-zero if we're increasing the number of lines.
      gl = current_line >= @_rl_vis_botlin && inv_botlin > @_rl_vis_botlin
      # Sometimes it is cheaper to print the characters rather than
      # use the terminal's capabilities.  If we're growing the number
      # of lines, make sure we actually cause the new line to wrap
      # around on auto-wrapping terminals.
      if (@_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || @_rl_term_IC) && (!@_rl_term_autowrap || !gl))

         # If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and
         #   _rl_horizontal_scroll_mode == 1, inserting the characters with
         #   _rl_term_IC or _rl_term_ic will screw up the screen because of the
         #   invisible characters.  We need to just draw them.
         if (old[ostart+ols] != ?\0 && (!@_rl_horizontal_scroll_mode || @_rl_last_c_pos > 0 ||
            lendiff <= @prompt_visible_length || current_invis_chars==0))

            insert_some_chars(new[nfd..-1], lendiff, col_lendiff)
            @_rl_last_c_pos += col_lendiff
         elsif ((@rl_byte_oriented) && old[ostart+ols] == ?\0 && lendiff > 0)
            # At the end of a line the characters do not have to
            # be "inserted".  They can just be placed on the screen.
            # However, this screws up the rest of this block, which
            # assumes you've done the insert because you can.
            _rl_output_some_chars(new,nfd, lendiff)
            @_rl_last_c_pos += col_lendiff
         else
            # We have horizontal scrolling and we are not inserting at
            # the end.  We have invisible characters in this line.  This
            # is a dumb update.
            _rl_output_some_chars(new,nfd, temp)
            @_rl_last_c_pos += col_temp
            return
         end
         # Copy (new) chars to screen from first diff to last match.
         temp = nls - nfd
         if ((temp - lendiff) > 0)
            _rl_output_some_chars(new,(nfd + lendiff),temp - lendiff)
            # XXX -- this bears closer inspection.  Fixes a redisplay bug
            # reported against bash-3.0-alpha by Andreas Schwab involving
            # multibyte characters and prompt strings with invisible
            # characters, but was previously disabled.
            @_rl_last_c_pos += _rl_col_width(new,nfd+lendiff, nfd+lendiff+temp-col_lendiff)
         end
      else
         # cannot insert chars, write to EOL
         _rl_output_some_chars(new,nfd, temp)
         @_rl_last_c_pos += col_temp
         # If we're in a multibyte locale and were before the last invisible
         #   char in the current line (which implies we just output some invisible
         #   characters) we need to adjust _rl_last_c_pos, since it represents
         #   a physical character position.
      end
   else           # Delete characters from line.
      # If possible and inexpensive to use terminal deletion, then do so.
      if (@_rl_term_dc && (2 * col_temp) >= -col_lendiff)

         # If all we're doing is erasing the invisible characters in the
         #   prompt string, don't bother.  It screws up the assumptions
         #   about what's on the screen.
         if (@_rl_horizontal_scroll_mode && @_rl_last_c_pos == 0 &&
            -lendiff == @visible_wrap_offset)
            col_lendiff = 0
         end

         if (col_lendiff!=0)
            delete_chars(-col_lendiff) # delete (diff) characters
         end

         # Copy (new) chars to screen from first diff to last match
         temp = nls - nfd
         if (temp > 0)
            _rl_output_some_chars(new,nfd, temp)
            @_rl_last_c_pos += _rl_col_width(new,nfd,nfd+temp)
         end

         # Otherwise, print over the existing material.
      else
         if (temp > 0)
            _rl_output_some_chars(new,nfd, temp)
            @_rl_last_c_pos += col_temp      # XXX
         end

         lendiff = (oe) - (ne)
         if !@rl_byte_oriented
            col_lendiff = _rl_col_width(old, ostart, ostart+oe) - _rl_col_width(new, 0, ne)
         else
            col_lendiff = lendiff
         end

         if (col_lendiff!=0)
            if (@_rl_term_autowrap && current_line < inv_botlin)
               space_to_eol(col_lendiff)
            else
               _rl_clear_to_eol(col_lendiff)
            end
         end
      end
   end
end

.using_history ⇒ Object 



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# File 'lib/rbreadline.rb', line 6023

def using_history()
   @history_offset = @history_length
end

.vis_chars(line) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2619

def vis_chars(line)
   @visible_line[@vis_lbreaks[line] .. -1]
end

.vis_line(line) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2627

def vis_line(line)
   ((line) > @_rl_vis_botlin) ? "" : vis_chars(line)
end

.vis_llen(l) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2611

def vis_llen(l)
   ((l) > @_rl_vis_botlin ? 0 : (@vis_lbreaks[l+1] - @vis_lbreaks[l]))
end

.vis_pos(line) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2623

def vis_pos(line)
   @vis_lbreaks[line]
end

.w_offset(line, offset) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2607

def w_offset(line, offset)
   ((line) == 0 ? offset : 0)
end

.where_history ⇒ Object

Returns the magic number which says what history element we are

looking at now.  In this implementation, it returns history_offset.



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# File 'lib/rbreadline.rb', line 5258

def where_history()
   @history_offset
end

.whitespace(c) ⇒ Object 



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# File 'lib/rbreadline.rb', line 2603

def whitespace(c)
   (c == ' ' || c == "\t")
end