Class: Canis::TextArea

Inherits:
Widget show all
Includes:
ListScrollable, ListEditable
Defined in:
lib/canis/core/widgets/extras/rtextarea.rb

Overview

a multiline text editing widget TODO - giving data to user - adding newlines, and withog adding.

- respect newlines for incoming data
we need a set_text method, passing nil or blank clears
current way is not really good. remove_all sucks.
 TODO don't set maxlen if nil. compute it as a local in methods. Else splitpane will not
 work correctly.

Instance Attribute Summary collapse

Attributes included from ListScrollable

#find_offset, #find_offset1, #search_found_ix, #show_caret

Attributes inherited from Widget

#_object_created, #col_offset, #config, #curpos, #focussed, #form, #handler, #id, #key_label, #parent_component, #row_offset, #state

Instance Method Summary collapse

Methods included from ListEditable

#add_to_kill_ring, #append_next_kill, #append_row, #delete_at, #delete_curr_char, #delete_eol, #delete_forward, #delete_line, #delete_prev_char, #delete_word, #join_next_line, #kill_ring_save, #remove_all, #undo_handler, #yank, #yank_pop

Methods included from ListScrollable

#_convert_index_to_printable_row, #_convert_index_to_visible_row, #_find_next, #_find_prev, #ask_search, #backward_word, #bounds_check, #find_more, #find_next, #find_prev, #focussed_index, #forward_char, #forward_word, #goto_bottom, #goto_last_position, #goto_top, #highlight_focussed_row, #install_keys, #is_visible?, #next_match, #next_row, #previous_row, #sanitize, #scroll_backward, #scroll_forward, #scroll_left, #scroll_right, #selected_item, #set_focus_on, #set_form_row, #set_selection_for_char, #show_caret_func, #truncate

Methods inherited from Widget

#action_manager, #bgcolor, #color, #color_pair, #command, #destroy, #focus, #focusable, #focusable?, #getvalue_for_paint, #hide, #modified?, #move, #on_enter, #on_leave, #override_graphic, #process_key, #property_set, #remove, #repaint_all, #repaint_required, #set_form, #set_form_row, #setformrowcol, #setrowcol, #show, #unbind_key

Methods included from Io

#__create_footer_window, #clear_this, #get_file, #print_this, #rb_getchar, #rb_gets, #rb_getstr, #warn

Methods included from Utils

#ORIG_process_key, #ORIGbind_key, #ORIGkeycode_tos, #_process_key, #bind_composite_mapping, #bind_key, #bind_keys, #check_composite_mapping, #create_logger, #define_key, #define_prefix_command, #execute_mapping, #get_attrib, #get_color, #key, #key_tos, #print_key_bindings, #repeatm, #run_command, #shell_out, #shell_output, #suspend, #view, #xxxbind_composite_mapping

Methods included from ConfigSetup

#config_setup, #variable_set

Methods included from EventHandler

#bind, #event?, #event_list, #fire_handler, #fire_property_change, #register_events

Constructor Details

#initialize(form = nil, config = {}, &block) ⇒ TextArea

Returns a new instance of TextArea.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 53

def initialize form = nil, config={}, &block
  @focusable = true
  @editable = true
  @row = 0
  @col = 0
  @curpos = 0
  @list = []
  @suppress_borders = false
  @row_offset = @col_offset = 1 # for cursor display on first entry, so not positioned on border
  @_events ||= [] 
  @_events.push :CHANGE
  super
  @orig_col = @col
  # this does result in a blank line if we insert after creating. That's required at 
  # present if we wish to only insert
  if @list.empty?
  #  @list << "\r"   # removed this on 2009-02-15 17:25 lets see how it goes
  end
  @content_rows = @list.length
  @win = @graphic # 2009-12-26 14:54 BUFFERED  replace form.window with graphic
  # 2010-01-10 19:35 compute locally if not set
  install_keys
  init_vars
  bordertitle_init
  init_actions
end

Instance Attribute Details

#overwrite_mode ⇒ Object

dsl_accessor :suppress_borders # added 2010-02-12 12:21 values true or false



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 51

def overwrite_mode
  @overwrite_mode
end

#toprow ⇒ Object (readonly)

Returns the value of attribute toprow.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 46

def toprow
  @toprow
end

Instance Method Details

#<<(data) ⇒ Object

wraps line sent in if longer than _maxlen Typically a line is sent in. We wrap and put a hard return at end.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 139

def << data
  # if width if nil, either set it, or add this to a container that sets it before calling this method
  _maxlen = @maxlen || @width - @internal_width
  if data.length > _maxlen
    #$log.debug "wrapped append for #{data}"
    data = wrap_text data
    #$log.debug "after wrap text for :#{data}"
    data = data.split("\n")
    # 2009-01-01 22:24 the \n was needed so we would put a space at time of writing.
    # we need a soft return so a space can be added when pushing down.
    # commented off 2008-12-28 21:59 
    #data.each {|line| @list << line+"\n"}
    data.each {|line| @list << line}
     @list[-1] << "\r" #XXXX
  else
    #$log.debug "normal append for #{data}"
    data << "\r" if data[-1,1] != "\r" #XXXX
    @list << data
  end
  set_modified  # added 2009-03-07 18:29 
  goto_end if @auto_scroll 
  self
end

#addcol(num) ⇒ Object

FIXME : these 2 only require the footer to be repainted not everything We should be able to manage that. We need a repaint_footer_required. Setting repaint_required really slows performance when one presses the right arrow key since a repaint is happenign repeatedly for each key.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 474

def addcol num
#     @repaint_required = true # added 2010-01-15 23:59, so that footer is updated, sucks!
  @repaint_footer_required = true # 2010-01-23 22:41 
  my_win = @form || @parent_component.form # 2010-02-12 12:51 
  my_win.addcol num
end

#addrowcol(row, col) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 480

def addrowcol row,col
  #@repaint_required = true # added 2010-01-15 23:59 
  @repaint_footer_required = true # 2010-01-23 22:41 
  my_win = @form || @parent_component.form # 2010-02-12 12:51 
  my_win.addrowcol row, col
end

#ask_search_forward ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 898

def ask_search_forward
    regex =  get_string("Enter regex to search", 20, @last_regex||"")
    ix = _find_next regex, @current_index
    if ix.nil?
      alert("No matching data for: #{regex}")
    else
      set_focus_on(ix)
      set_form_col @find_offset
    end
end

#at_eol? ⇒ Boolean

added 2009-10-04 22:13 returns whether cursor is at end of line

Returns:

  • (Boolean) 


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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 458

def at_eol?
  if @curpos+1== @list[@current_index].length  
    return  true
  end
  return false
end

#at_last_line? ⇒ Boolean

added 2009-10-04 22:13 returns whether at last line (required so that forward does not go to start)

Returns:

  • (Boolean) 


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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 466

def at_last_line?
  return true if @list.length == @current_index + 1
  return false
end

#buffer_len ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 430

def buffer_len
  @list[@current_index].nil? ? 0 : @list[@current_index].chomp().length  
end

#current_line ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 790

def current_line
  @list[@current_index]
end

#cursor_backward ⇒ Object

2009-10-04 23:01 taken care that you can’t go back at start of textarea it was going onto border



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 488

def cursor_backward
    #$log.debug "back char cp ll and ci #{@list.length}, #{@current_index}"
    #$log.debug "back char cb #{@curpos}, #{@buffer.length}. wi: #{@width}"
    return if @curpos == 0 and @current_index == 0 # added 2009-10-04 23:02 
    repeatm { 
      if @curpos > 0
        @curpos -= 1
        addcol -1
      else # trying this out 2008-12-26 20:18 
        ret = up
        cursor_eol if ret != -1
      end
    }
end

#cursor_bol ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 808

def cursor_bol
  set_form_col 0
end

#cursor_bounds_check ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 426

def cursor_bounds_check
  max = buffer_len()
  @curpos = max if @curpos > max # check 2008-12-27 00:02 
end

#cursor_eol ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 803

def cursor_eol
   _maxlen = @maxlen || @width - @internal_width
  $log.error "ERROR !!! bufferlen gt _maxlen #{@buffer.length}, #{_maxlen}" if @buffer.length > _maxlen
  set_form_col current_line().chomp().length() #-1 needs to be one ahead 2011-10-10 TRYING OUT XXX
end

#cursor_forward(num = 1) ⇒ Object

FIXME : if cursor at end of last line then forward takes cursor to start of last line (same line), should stop there.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 440

def cursor_forward num=1
  #$log.debug "next char cp #{@curpos}, #{@buffer.length}. wi: #{@width}"
  #$log.debug "next char cp ll and ci #{@list.length}, #{@current_index}"
  #if @curpos < @width and @curpos < maxlen-1 # else it will do out of box
  return if at_eol? and at_last_line?
  repeatm { 
  if @curpos < buffer_len()
    @curpos += 1
    addcol 1
  else # trying this out 2008-12-26 20:18 
    @curpos = 0
    down 1 # if not then multipler will trigger there too
  end
  cursor_bounds_check
  }
end

#do_current_row {|| ... } ⇒ Object

:yields current row

Yields:

  • () 


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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 433

def do_current_row # :yields current row
  yield @list[@current_index]
  @buffer = @list[@current_index]
end

#do_relative_row(num) {|| ... } ⇒ Object

Yields:

  • () 


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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 793

def do_relative_row num
  yield @list[@current_index+num] 
end

#edit_external ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 920

def edit_external
  require 'canis/core/include/appmethods'
  require 'tempfile'
  f = Tempfile.new("canis")
  l = self.text
  l.each { |line| f.puts line }
  fp = f.path
  f.flush

  editor = ENV['EDITOR'] || 'vi'
  vimp = %x[which #{editor}].chomp
  ret = shell_out "#{vimp} #{fp}"
  if ret
    lines = File.open(f,'r').readlines
    set_content(lines, :content_type => @old_content_type)
  end
end

#get_content ⇒ Object

FOR scrollable ###



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 225

def get_content
  @list
end

#get_text ⇒ Object

def to_s this was just annoying in debugs



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 812

def get_text
  l = getvalue
  str = ""
  old = " "
  l.each_with_index do |line, i|
    tmp = line.gsub("\n","")
    tmp.gsub!("\r", "\n")
    if old[-1,1] !~ /\s/ and tmp[0,1] !~ /\s/
      str << " "
    end
    str << tmp
    old = tmp
  end
  str
end

#get_window ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 266

def get_window
  @graphic
end

#getvalue ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 276

def getvalue
  @list
end

#handle_key(ch) ⇒ Object

textarea



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 327

def handle_key ch
  @current_key = ch # I need some funcs to know what key they were mapped to
  @buffer = @list[@current_index]
  if @buffer.nil? and @list.length == 0
    ## 2009-10-04 22:39 
    # what this newline does is , if we use << to append, data is appended
    # to second line
    @list << "\n" # changed space to newline so wrapping puts a line.
    @current_index = 0 ; ## added 2009-10-04 21:47 
    @buffer = @list[@current_index]
  end
  ## 2009-10-04 20:48  i think the next line was resulting in a hang if buffer nil
  # in sqlc on pressing Clear.
  # if buffer is nil and user wants to enter something -- added UNHANDLED
  return :UNHANDLED if @buffer.nil?
  #$log.debug "TA: before: curpos #{@curpos} blen: #{@buffer.length}"
  # on any line if the cursor is ahead of buffer length, ensure its on last position
  # what if the buffer is somehow gt maxlen ??
  if @curpos > @buffer.length
    addcol(@buffer.length-@curpos)+1
    @curpos = @buffer.length
  end
  #$log.debug "TA: after : curpos #{@curpos} blen: #{@buffer.length}, w: #{@width} max #{@maxlen}"
  
  #NOTE C-d being used for del what of scroll !!
  case ch
  when KEY_ENTER, KEY_RETURN, FFI::NCurses::KEY_ENTER # numeric enter
    insert_break
  #when ?\C-u.getbyte(0)
    ## since textareas are editable we use a control key to increase
    ## multiplier. Series is 4 16 64
    #@multiplier = (@multiplier == 0 ? 4 : @multiplier *= 4)
    #return 0
  else
    #$log.debug(" textarea ch #{ch}")
    ret = putc ch
    if ret == :UNHANDLED
      # check for bindings, these cannot override above keys since placed at end
      ret = process_key ch, self
      #$log.debug "TA process_key #{ch} got ret #{ret} in #{@name} "
      return :UNHANDLED if ret == :UNHANDLED
    end
  end
  set_form_row
  set_form_col  # testing 2008-12-26 19:37 
  $multiplier = 0 # reset only if key handled
  return 0
end

#init_actions ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 954

def init_actions
  editor = ENV['EDITOR'] || 'vi'
  am = action_manager()
  am.add_action(Action.new("&Edit in #{editor} ") { edit_external })
  am.add_action(Action.new("&Saveas") { saveas() } )
end

#init_vars ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 79

def init_vars
  @repaint_required = true
  @repaint_footer_required = true # 2010-01-23 22:41 
  @toprow = @current_index = @pcol = 0
  @repaint_all=true 
  @row_offset = @col_offset = 0 if @suppress_borders
  @longest_line = 0
  # if borders used, reduce 2 from width else 0
  @internal_width = 2
  @internal_width = 2 if @suppress_borders # WHAT THE !!!! It should be zero
  bind_key(?\M-w, :kill_ring_save)
  bind_key(?\C-y, :yank)
  bind_key(?\M-y, :yank_pop)
  bind_key(?\M-\C-w, :append_next_kill)
  map_keys
end

#insert(off0, data) ⇒ Object

trying to wrap and insert



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 114

def insert off0, data
   _maxlen = @maxlen || @width - @internal_width
  if data.length > _maxlen
    data = wrap_text data
  #  $log.debug "after wrap text done :#{data}"
    data = data.split("\n")
    data[-1] << "\r" #XXXX
  data.each do |row|
    @list.insert off0, row
    off0 += 1
  end
  else
    data << "\r" if data[-1,1] != "\r" #XXXX
    @list.insert off0, data
  end
  # expecting array !! 
  #data.each do |row|
    #@list.insert off0, row
    #off0 += 1
  #end
  #$log.debug " AFTER INSERT: #{@list}"
end

#insert_break ⇒ Object

FIXME - fire event not correct, not undo’ing correctly, check row and also slash r append



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 393

def insert_break
  return -1 unless @editable
  # insert a blank row and append rest of this line to cursor
  $log.debug "ENTER PRESSED at  #{@curpos}, on row #{@current_index}"
  @delete_buffer = (delete_eol || "")
  @list[@current_index] << "\r"
  $log.debug "DELETE BUFFER #{@delete_buffer}" 
  @list.insert @current_index+1, @delete_buffer 
  @curpos = 0
  down
  col = @orig_col + @col_offset
  setrowcol @row+1, col
  # FIXME maybe this should be insert line since line inserted, not just data, undo will delete it
  fire_handler :CHANGE, InputDataEvent.new(@curpos,@curpos+@delete_buffer.length, self, :INSERT_LINE, @current_index, @delete_buffer)     #  2008-12-24 18:34 
end

#insert_wrap(lineno, pos, lastchars) ⇒ Object

this attempts to recursively insert into a row, seeing that any stuff exceeding is pushed down further. Yes, it should check for a para end and insert. Currently it could add to next para.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 686

def insert_wrap lineno, pos, lastchars
   _maxlen = @maxlen || @width - @internal_width
  @list[lineno].insert pos, lastchars 
  len = @list[lineno].length 
  if len > _maxlen
      push_last_word lineno #- sometime i may push down 10 chars but the last word is less
    end
end

#join_to_prev_line ⇒ Object

private when backspace pressed in position zero if the previous line is filled we may have to bring down the last word and join, rather than go up FIXME : make logic simple. Append entire line to above line. Then go to maxlen if not a space, reverse to find last space. Lop off all after space and replace this line with that balance. UNDO and REDO has to work in this case too. FIXME bare in mind handlers when doing this



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 508

def join_to_prev_line
  return -1 unless @editable
  return if @current_index == 0
  oldcurpos = @curpos
  oldprow = @current_index
  prev = @list[@current_index-1].chomp
  prevlen = prev.length
  # 2008-12-26 21:37 delete previous line if nothing there. This moves entire buffer up.
  if prevlen == 0
    delete_line @current_index-1
    up
    return
  end
  _maxlen = @maxlen || @width - @internal_width
  space_left = _maxlen - prevlen
  # prev line is full exit
  return if space_left == 0

  # get last space, if none, return
  blank_found = @buffer.rindex(' ', space_left)
  return unless blank_found # no word in the space i can carry up.
  # get string for carrying up
  carry_up = @buffer[0..blank_found]
  result = @list[@current_index-1].chomp! # this has to be undone too.
  @list[@current_index-1] << carry_up
  #$log.debug "carry up: #{carry_up} prevrow:#{@list[@current_index -1]}"
  # remove from curr line
  @list[@current_index].slice!(0..carry_up.length-1)
  $log.debug "carry up: #{carry_up} currrow:#{@list[@current_index]}"
  #@list[@current_index] ||= ""
  up
  addrowcol -1,0
  @curpos = prevlen
  # if result not nil, then we need that to be recorded FIXME
  fire_handler :CHANGE, InputDataEvent.new(oldcurpos,oldcurpos+carry_up.length, self, :DELETE, oldprow, carry_up)
  fire_handler :CHANGE, InputDataEvent.new(prevlen,prevlen+carry_up.length, self, :INSERT, oldprow-1, carry_up)

  ## BUG. carry full words up, or if no space then bring down last word of prev lien and join with first
  #carry_up = words_in_length @buffer, space_left #@buffer[0..space_left] # XXX
  #if carry_up.nil?
    ## carry down last word
    #prev_wd = remove_last_word @current_index-1
    ## 2010-01-14 18:26 check added else crashing if C-h pressed with no data in line
    #if !prev_wd.nil?
       #@buffer.insert 0, prev_wd
       #@curpos = prev_wd.length
       #$log.debug " carry up nil! prev_wd (#{prev_wd}) len:#{prev_wd.length}"
       #fire_handler :CHANGE, InputDataEvent.new(0,prev_wd.length, self, :INSERT, oldprow, prev_wd)     #  2008-12-26 23:07 
    #end
  #else
    #$log.debug " carrying up #{carry_up.length} #{carry_up}, space: #{space_left}"
    #@list[@current_index-1]=prev + carry_up
    #space_left2 = @buffer[(carry_up.length+1)..-1]
    #@list[@current_index]=space_left2 #if !space_left2.nil?
    #@list[@current_index] ||= ""
    #up
    #addrowcol -1,0
    #@curpos = prevlen
    #fire_handler :CHANGE, InputDataEvent.new(oldcurpos,carry_up.length, self, :DELETE, oldprow, carry_up)     #  2008-12-24 18:34 
    #fire_handler :CHANGE, InputDataEvent.new(prevlen,carry_up.length, self, :INSERT, oldprow-1, carry_up)     #  2008-12-24 18:34 
  #end
  ## FIXME -- can;t have a naked for reference here.
  ##@form.col = @orig_col + @col_offset + @curpos
  col1 = @orig_col + @col_offset + @curpos
  setrowcol nil, col1 # 2010-02-12 13:09  RFED16

#     $log.debug "carry up: nil" if carry_up.nil?
#     $log.debug "listrow nil " if @list[@current_index].nil?
#     $log.debug "carry up: #{carry_up} prow:#{@list[@current_index]}"
end

#kill_line ⇒ Object

mimicking emacs behavior of C-k. delete entire line if at start, else delete till eol



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 314

def kill_line
    # i'ved added curpos == 0 since emacs deletes a line if cursor is at 0
    # Earlier behavior was based on alpine which leaves a blank line
    if @editable
      if @buffer.chomp == "" || @curpos == 0
        delete_line
      else
        delete_eol 
      end
    end
end

#map_keys ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 280

def map_keys
  return if @keys_mapped
  @key_map = :both # get both vim and emacs keys
  require 'canis/core/include/listbindings'
  bindings
  #
  # There's one issue, if using vim keys, most of them won't
  # work in text area. So you will need emacs keys in text area.

  # moved to listbin
  #bind_key(Ncurses::KEY_LEFT){ cursor_backward }
  #bind_key(Ncurses::KEY_RIGHT){ cursor_forward }
  #bind_key(Ncurses::KEY_UP){ ret = up;  get_window.ungetch(KEY_BTAB) if ret == :NO_PREVIOUS_ROW }
  # the next was irritating if user wanted to add a row ! 2011-10-10 
  ##bind_key(Ncurses::KEY_DOWN){ ret = down ; get_window.ungetch(KEY_TAB) if ret == :NO_NEXT_ROW }
  #bind_key(Ncurses::KEY_DOWN){ ret = down ; }

  bind_key(KEY_BACKSPACE){ delete_prev_char if @editable }
  bind_key(KEY_BSPACE){ delete_prev_char if @editable}
  bind_key(?\M-d, :delete_word)
  bind_key(?\M-f, :forward_word)

  # earlier 330
  bind_key(FFI::NCurses::KEY_DC, 'delete current char'){ delete_curr_char if @editable }
  bind_key(?\C-k, 'kill line'){ kill_line }
  bind_key(?\C-_, 'undo'){ undo }
  bind_key(?\C-r, 'redo') { text_redo }
  #bind_key(27){ set_buffer @original_value }
  #bind_key([?\C-x, ?e], :edit_external)
  #bind_key([?\C-x, ?\C-s], :saveas)
  @keys_mapped = true
end

#move_char_up ⇒ Object

move up one char from next row to current, used when deleting in a line should not be called if line ends in “r”



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 769

def move_char_up
  @list[@current_index] << @list[@current_index+1].slice!(0)
  delete_line(@current_index+1) if next_line().length==0
end

#move_chars_up ⇒ Object

tries to move up as many as possible should not be called if line ends in “r”



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 775

def move_chars_up
  oldprow = @current_index
  oldcurpos = @curpos
   _maxlen = @maxlen || @width - @internal_width
  space_left = _maxlen - @buffer.length
  can_move = [space_left, next_line.length].min
  carry_up =  @list[@current_index+1].slice!(0, can_move)
  @list[@current_index] << carry_up
  delete_line(@current_index+1) if next_line().length==0
  fire_handler :CHANGE, InputDataEvent.new(oldcurpos,oldcurpos+can_move, self, :INSERT, oldprow, carry_up)     #  2008-12-24 18:34 
end

#next_line ⇒ Object

returns next line, does not move to it,



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 787

def next_line
  @list[@current_index+1]
end

#Oinsert(off0, *data) ⇒ Object

this avoids wrapping. Better to use the <<.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 101

def Oinsert off0, *data
  @list.insert off0, *data
  # fire_handler :CHANGE, self  # 2008-12-09 14:56  NOT SURE
end

#old_join_to_prev_line ⇒ Object

private when backspace pressed in position zero if the previous line is filled we may have to bring down the last word and join, rather than go up FIXME : make logic simple. Append entire line to above line. Then go to maxlen if not a space, reverse to find last space. Lop off all after space and replace this line with that balance. UNDO and REDO has to work in this case too. FIXME bare in mind handlers when doing this



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 584

def old_join_to_prev_line
  return -1 unless @editable
  return if @current_index == 0
  oldcurpos = @curpos
  oldprow = @current_index
  prev = @list[@current_index-1].chomp
  prevlen = prev.length
  # 2008-12-26 21:37 delete previous line if nothing there. This moves entire buffer up.
  if prevlen == 0
    delete_line @current_index-1
    up
    return
  end
  _maxlen = @maxlen || @width - @internal_width
  space_left = _maxlen - prev.length
  # BUG. carry full words up, or if no space then bring down last word of prev lien and join with first
  carry_up = words_in_length @buffer, space_left #@buffer[0..space_left] # XXX
  if carry_up.nil?
    # carry down last word
    prev_wd = remove_last_word @current_index-1
    # 2010-01-14 18:26 check added else crashing if C-h pressed with no data in line
    if !prev_wd.nil?
       @buffer.insert 0, prev_wd
       @curpos = prev_wd.length
       $log.debug " carry up nil! prev_wd (#{prev_wd}) len:#{prev_wd.length}"
       fire_handler :CHANGE, InputDataEvent.new(0,prev_wd.length, self, :INSERT, oldprow, prev_wd)     #  2008-12-26 23:07 
    end
  else
    $log.debug " carrying up #{carry_up.length} #{carry_up}, space: #{space_left}"
    @list[@current_index-1]=prev + carry_up
    space_left2 = @buffer[(carry_up.length+1)..-1]
    @list[@current_index]=space_left2 #if !space_left2.nil?
    @list[@current_index] ||= ""
    up
    addrowcol -1,0
    @curpos = prevlen
    fire_handler :CHANGE, InputDataEvent.new(oldcurpos,carry_up.length, self, :DELETE, oldprow, carry_up)     #  2008-12-24 18:34 
    fire_handler :CHANGE, InputDataEvent.new(prevlen,carry_up.length, self, :INSERT, oldprow-1, carry_up)     #  2008-12-24 18:34 
  end
  # FIXME -- can;t have a naked for reference here.
  #@form.col = @orig_col + @col_offset + @curpos
  col1 = @orig_col + @col_offset + @curpos
  setrowcol nil, col1 # 2010-02-12 13:09  RFED16

#     $log.debug "carry up: nil" if carry_up.nil?
#     $log.debug "listrow nil " if @list[@current_index].nil?
#     $log.debug "carry up: #{carry_up} prow:#{@list[@current_index]}"
end

#OLDprint_borders ⇒ Object

private



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 182

def OLDprint_borders
  window = @graphic # 2009-12-26 14:54 BUFFERED
  @color_pair = get_color($datacolor) # 2011-09-28 V1.3.1 
  bordercolor = @border_color || @color_pair
  borderatt = @border_attrib || Ncurses::A_NORMAL
  #color = $datacolor
  #window.print_border @row, @col, @height, @width, color
  window.print_border @row, @col, @height-1, @width, bordercolor, borderatt
  print_title
=begin
  hline = "+%s+" % [ "-"*(width-((1)*2)) ]
  hline2 = "|%s|" % [ " "*(width-((1)*2)) ]
  window.printstring( row=startrow, col=startcol, hline, color)
  print_title
  (startrow+1).upto(startrow+height-1) do |row|
    window.printstring(row, col=startcol, hline2, color)
  end
  window.printstring(startrow+height, col=startcol, hline, color)
=end
  
end

#OLDprint_title ⇒ Object

private



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 204

def OLDprint_title
  # truncate title if longer than width
  return unless @title
  @color_pair ||= get_color($datacolor)
  _title = @title
  if @title.length > @width - 2
    _title = @title[0..@width-2]
  end
  @graphic.printstring( @row, @col+(@width-_title.length)/2, _title, @color_pair, @title_attrib) unless @title.nil?
end

#paint ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 839

def paint
  # not sure where to put this, once for all or repeat 2010-02-12 RFED16
  #my_win = @form? @form.window : @target_window
  #$log.warn "neither form not target window given!!! TA paint 751" unless my_win
  raise "height or width nil h:#{@height} , w: #{@width} " if @height.nil? || @width.nil?
  raise "graphic is nil in textarea paint()" unless @graphic
  print_borders if (@suppress_borders == false && @repaint_all) # do this once only, unless everything changes
  rc = row_count
  _maxlen = @maxlen || @width-@internal_width # TODO fix in other branches remove ||= 
  $log.debug " #{@name} textarea repaint width is #{@width}, height is #{@height} , maxlen #{_maxlen}/ #{@maxlen}, #{@graphic.name} "
  tm = get_content
  tr = @toprow
  acolor = get_color $datacolor
  h = scrollatrow()
  r,c = rowcol
  @longest_line = @width # _maxlen scroll uses width not maxlen
  $log.debug " TA:::: #{tr} , #{h}, r #{r} c #{c} "
  0.upto(h) do |hh|
    crow = tr+hh
    if crow < rc
        #focussed = @current_index == crow ? true : false 
        #selected = is_row_selected crow
      content = tm[crow].chomp rescue ""
        content.gsub!(/\t/, '  ') # don't display tab
        content.gsub!(/[^[:print:]]/, '')  # don't display non print characters
        if !content.nil? 
          if content.length > _maxlen # only show _maxlen
            @longest_line = content.length if content.length > @longest_line
            ## added nil check since we are allowing scrolling in listscrollable anyway 2013-03-06 - 00:14 
            content = content[@pcol..@pcol+_maxlen-1] || " "
          else
            ## added nil check since we are allowing scrolling in listscrollable anyway
            content = content[@pcol..-1] || " "
          end
        end
        #renderer = get_default_cell_renderer_for_class content.class.to_s
        #renderer = cell_renderer()
        #renderer.repaint @form.window, r+hh, c+(colix*11), content, focussed, selected
        #renderer.repaint @form.window, r+hh, c, content, focussed, selected
        @graphic.printstring  r+hh, c, "%-*s" % [@width-@internal_width,content], acolor, @attr
        if @search_found_ix == tr+hh
          if !@find_offset.nil?
            @graphic.mvchgat(y=r+hh, x=c+@find_offset, @find_offset1-@find_offset, Ncurses::A_NORMAL, $reversecolor, nil)
          end
        end

    else
      # clear rows
        # TODO the spaces string can be stored once outside loop
      @graphic.printstring r+hh, c, " " * (@width-@internal_width), acolor,@attr
    end
  end
  show_caret_func

  @table_changed = false
  @repaint_required = false
  @repaint_footer_required = true # 2010-01-23 22:41 
  @repaint_all = false # added 2010-01-14 for redrawing everything
end

#print_foot ⇒ Object

text_area print footer



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 215

def print_foot
  @footer_attrib ||= Ncurses::A_REVERSE
  footer = "R: #{@current_index+1}, C: #{@curpos}, #{@list.length} lines  "
  #$log.debug " print_foot calling printstring with #{@row} + #{@height} -1, #{@col}+2"
  # changed 2010-01-02 19:31 BUFFERED we were exceeding 1
  #@graphic.printstring( @row + @height, @col+2, footer, $datacolor, @footer_attrib) 
  @graphic.printstring( @row + @height-1, @col+2, footer, @color_pair || $datacolor, @footer_attrib) 
  @repaint_footer_required = false
end

#push_last_word(lineno = @current_index) ⇒ Object

push the last word from given line to next I have modified it to push all words that are exceeding maxlen. This was needed for if i push 10 chars to next line, and the last word is less then the line will exceed. So i must push as many words as exceed length. 2010-09-07 22:31 this must not return nil, or previous will crash. This happens if no space in line.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 650

def push_last_word lineno=@current_index
   _maxlen = @maxlen || @width - @internal_width
  #lastspace = @buffer.rindex(" ")
  #lastspace = @list[lineno].rindex(/ \w/)
  line = @list[lineno]
  line = @list[lineno][0.._maxlen+1] if line.length > _maxlen
  lastspace = line.rindex(/ \w/)
  $log.debug " PUSH:2 #{lastspace},#{line},"
  # fix to ensure something returned 2010-09-07 22:40 
  lastspace = _maxlen-1 unless lastspace # added 2010-09-07 22:29  XXXX

  if !lastspace.nil?
    lastchars = @list[lineno][lastspace+1..-1]
    @list[lineno] = @list[lineno][0..lastspace]
    $log.debug "PUSH_LAST:ls:#{lastspace},lw:#{lastchars},lc:#{lastchars[-1]},:#{@list[lineno]}$"
    if lastchars[-1,1] == "\r" or @list[lineno+1].nil?
      # open a new line and keep the 10 at the end.
      append_row lineno, lastchars
    else
      # check for soft tab \n - NO EVEN THIS LOGIC IS WRONG.
      #if lastchars[-1,1] == "\n"
      if lastchars[-1,1] != ' ' and @list[lineno+1][0,1] !=' '
        #@list[lineno+1].insert 0, lastchars + ' '
        insert_wrap lineno+1, 0, lastchars + ' '
      else
        #@list[lineno+1].insert 0, lastchars 
        insert_wrap lineno+1, 0, lastchars 
      end
    end
    return lastchars, lastspace
  end
  return nil
end

#putc(c) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 747

def putc c
  if c >= 32 and c <= 126
    begin
      ret = putch c.chr
    rescue => ex
      # this does not prevent entry, it prevents updating
      # often comes here if error in event block, not our fault
      Ncurses.beep
      $log.debug " ERROR IN PUTCH RTEXTAREA  "
      $log.debug( ex) if ex
      $log.debug(ex.backtrace.join("\n")) if ex
    end
    if ret == 0
    # addcol 1
      set_modified 
      return 0
    end
  end
  return :UNHANDLED
end

#putch(char) ⇒ Object

add one char. careful, i shoved a string in yesterday.



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 696

def putch char
   _maxlen = @maxlen || @width - @internal_width
  @buffer ||= @list[@current_index]
  return -1 if !@editable #or @buffer.length >= _maxlen
  #if @chars_allowed != nil # remove useless functionality
    #return if char.match(@chars_allowed).nil?
  #end
  raise "putch expects only one char" if char.length != 1
  oldcurpos = @curpos
  #$log.debug "putch : pr:#{@current_index}, cp:#{@curpos}, char:#{char}, lc:#{@buffer[-1]}, buf:(#{@buffer})"
  if @overwrite_mode
    @buffer[@curpos] = char
  else
    @buffer.insert(@curpos, char)
  end
  @curpos += 1 
  #$log.debug "putch INS: cp:#{@curpos}, max:#{_maxlen}, buf:(#{@buffer.length})"
  if @curpos-1 > _maxlen or @buffer.length()-1 > _maxlen
    lastchars, lastspace = push_last_word @current_index
    #$log.debug "last sapce #{lastspace}, lastchars:#{lastchars},lc:#{lastchars[-1]}, #{@list[@current_index]} "
    ## wrap on word XX If last char is 10 then insert line
    @buffer = @list[@current_index]
    if @curpos-1 > _maxlen  or @curpos-1 > @buffer.length()-1
      ret = down 
      # keep the cursor in the same position in the string that was pushed down.
      @curpos = oldcurpos - lastspace  #lastchars.length # 0
    end
  end
  set_form_row
  @buffer = @list[@current_index]
  set_form_col
  @modified = true
  fire_handler :CHANGE, InputDataEvent.new(oldcurpos,@curpos, self, :INSERT, @current_index, char)     #  2008-12-24 18:34 
  @repaint_required = true
  0
end

#remove_last_word(lineno) ⇒ Object

removes and returns last word in given line number, or nil if no whitespace



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 733

def remove_last_word lineno
  @list[lineno].chomp!
  line=@list[lineno]
  lastspace = line.rindex(" ")
  if !lastspace.nil?
    lastchars = line[lastspace+1..-1]
    @list[lineno].slice!(lastspace..-1)
    $log.debug " remove_last: lastspace #{lastspace},#{lastchars},#{@list[lineno]}"
    fire_handler :CHANGE, InputDataEvent.new(lastspace,lastchars.length, self, :DELETE, lineno, lastchars)     #  2008-12-26 23:06 
    return lastchars
  end
  return nil
end

#repaint ⇒ Object

FOR scrollable ###



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 270

def repaint # textarea
  #return unless @repaint_required # 2010-02-12 19:08  TRYING - won't let footer print if only col move
  @graphic = @form.window unless @graphic # print_border not getting it 2014-08-30 - 20:41 
  paint if @repaint_required
  print_foot if @print_footer && !@suppress_borders && (@repaint_footer_required || @repaint_required)
end

#row_count ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 836

def row_count
  @list.size
end

#rowcol ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 95

def rowcol
#  $log.debug "textarea rowcol : #{@row+@row_offset+@winrow}, #{@col+@col_offset}"
  return @row+@row_offset, @col+@col_offset
end

#saveas(name = nil, config = {}) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 937

def saveas name=nil, config={}
  unless name
    name = rb_gets "File to save as: "
    return if name.nil? || name == ""
  end
  exists = File.exists? name
  if exists # need to prompt
    return unless rb_confirm("Overwrite existing file? ")
  end
  l = getvalue
  File.open(name, "w"){ |f|
    l.each { |line| f.puts line }
    #l.each { |line| f.write line.gsub(/\r/,"\n") }
  }
  rb_puts "#{name} written."
end

#scrollatrow ⇒ Object

alias :get_text :to_s —- for listscrollable —- ##



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 829

def scrollatrow
  if @suppress_borders
    @height - 1 
  else
    @height - 3 
  end
end

#set_content(lines, config = {}) ⇒ Object

sets content of textarea. I don’t know why this was not existing all this while Name to be consistent with textview. Okay, this does not wrap the words, we assume its short enough. FIXME. Avoid using currently till i firm this. NOTE: does not wrap, and does not trigger events Added on 2011-10-10 Added config for compatibility with textview

Parameters:

  • String (String, Array) —

    is an existing filename, Array is content to be replaced

Since:

  • 1.4.0



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 237

def set_content lines, config={}
  case lines
  when String
    if File.exists? lines
      lines = File.open(lines,"r").readlines
    else
      raise "set_content String param should be a filename"
    end
  when Array
  else
    raise "Don't know how to handle data in set_content: #{lines.class} "
  end
  @list.replace lines
  @repaint_required = true
end

#set_form_col(col1 = @curpos) ⇒ Object

set cursor on correct column



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 409

def set_form_col col1=@curpos
  @curpos = col1
  @cols_panned ||= 0
  cursor_bounds_check
  
  ## added win_col on 2009-12-28 20:21 for embedded forms BUFFERED TRYING OUT
  win_col = 0 # 2010-02-07 23:19 new cursor stuff
  #col = win_col + @orig_col + @col_offset + @curpos
  #col = win_col + @orig_col + @col_offset + @curpos + @cols_panned
  # 2010-01-14 13:31 changed orig_col to col for embedded forms, splitpanes.
  col = win_col + @col + @col_offset + @curpos + @cols_panned
  $log.debug "sfc: wc:#{win_col}  col:#{@col}, coff:#{@col_offset}. cp:#{@curpos} colsp:#{@cols_panned} . "
  #@form.setrowcol @form.row, col   # added 2009-12-29 18:50 BUFFERED
  $log.debug " TA calling setformrow col nil, #{col} "
  setrowcol nil, col   # added 2009-12-29 18:50 BUFFERED
  @repaint_footer_required = true
end

#set_modified(tf = true) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 796

def set_modified tf=true
  @modified = tf
  @repaint_required = tf
  @repaint_footer_required = tf
  # 2010-01-14 22:45 putting a check for form, so not necessary to have form set when appending data
  @form.modified = true if tf and !@form.nil?
end

#text(*val) ⇒ Object

alias :text :set_content set text Added for consistency with other widgets



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 255

def text(*val)
  if val.empty?
    return @list
  end
  set_content(*val)
  self
end

#text=(val) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 262

def text=(val)
  return unless val # added 2010-11-17 20:11, dup will fail on nil
  set_content(val)
end

#text_redo ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 915

def text_redo
  return unless @undo_handler
  @undo_handler.redo
end

#undo ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 908

def undo
  if @undo_handler
    @undo_handler.undo
  else
    undo_delete
  end
end

#undo_delete ⇒ Object

this is broken, delete_buffer could be a line or a string or array of lines



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 376

def undo_delete
    # added 2008-11-27 12:43  paste delete buffer into insertion point
    return if @delete_buffer.nil?
    $log.warn "undo_delete is broken! perhaps cannot be used . textarea 347 "
    # FIXME - can be an array
    case @delete_buffer
    when Array
      # we need to unroll array, and it could be lines not just a string
      str = @delete_buffer.first
    else
      str = @delete_buffer
    end
    @buffer.insert @curpos, str 
    set_modified 
    fire_handler :CHANGE, InputDataEvent.new(@curpos,@curpos+@delete_buffer.length, self, :INSERT, @current_index, @delete_buffer)     #  2008-12-24 18:34 
end

#words_in_length(buff, len) ⇒ Object

return as many words as fit into len for carrying up.. actually there is a case of when the next char (len+1) is a white space or word boundary. XXX



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 635

def words_in_length buff, len
  return nil if len == 0
  str = buff[0..len]
  ix = str.rindex(/\s/)
  $log.debug " str #{str} len #{len} ix #{ix} , buff #{buff}~"
  return nil if ix.nil?
  ix = ix > 0 ? ix - 1 : ix
  $log.debug " str[]:#{str[0..ix]}~ len #{len} ix #{ix} , buff #{buff}~"
  return str[0..ix]
end

#wrap_para(line = @current_index) ⇒ Object 



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 162

def wrap_para line=@current_index
  line ||= 0
  l=[]
  while true
    if @list[line].nil? or @list[line]=="" or @list[line]==13 #"\r"
      break
    end
    #$log.debug "lastchar #{@list[line][-1]}, appending: #{@list[line]}]"
    t =  @list[line]
    l << t.strip
    @list.delete_at line
    break if t[-1]==13 # "\r"
#    line += 1
  end
  str=l.join(" ")
  #$log.debug " sending insert : #{str}."
  insert line, str
end

#wrap_text(txt, col = @maxlen) ⇒ Object

private



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# File 'lib/canis/core/widgets/extras/rtextarea.rb', line 106

def wrap_text(txt, col = @maxlen)
   col ||= @width - @internal_width
  #$log.debug "inside wrap text for :#{txt}"
  txt.gsub(/(.{1,#{col}})( +|$\n?)|(.{1,#{col}})/,
           "\\1\\3\n") 
end