Class: Canis::TextView

Inherits:
Widget show all
Extended by:
Forwardable
Includes:
ListScrollable
Defined in:
lib/canis/core/widgets/deprecated/rtextview.rb

Overview

A viewable read only box. Can scroll. Intention is to be able to change content dynamically - the entire list. Use set_content to set content, or just update the list attrib TODO - 

- goto line - DONE

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 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, #scroll_backward, #scroll_forward, #scroll_left, #scroll_right, #selected_item, #set_focus_on, #set_form_row, #set_selection_for_char, #show_caret_func

Methods inherited from Widget

#action_manager, #bgcolor, #color, #color_pair, #command, #destroy, #focus, #focusable, #focusable?, #getvalue_for_paint, #hide, #modified?, #move, #on_leave, #override_graphic, #process_key, #property_set, #remove, #repaint_all, #repaint_required, #set_form, #set_form_row, #set_modified, #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) ⇒ TextView

Returns a new instance of TextView.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 45

def initialize form = nil, config={}, &block
  @focusable = true
  @editable = false
  @sanitization_required = true
  @suppress_borders = false
  @row_offset = @col_offset = 1 
  @row = 0
  @col = 0
  @show_focus = false  # don't highlight row under focus
  @list = []
  map_keys
  super
  # ideally this should have been 2 to take care of borders, but that would break
  # too much stuff !
  @win = @graphic

  @_events.push :CHANGE # thru vieditable
  @_events << :PRESS # new, in case we want to use this for lists and allow ENTER
  @_events << :ENTER_ROW # new, should be there in listscrollable ??
  install_keys # do something about this nonsense FIXME
  bordertitle_init
  init_vars
  init_actions
end

Instance Attribute Details

#current_index ⇒ Object (readonly)

Returns the value of attribute current_index.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 42

def current_index
  @current_index
end

#toprow ⇒ Object (readonly)

the toprow in the view (offsets are 0)



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 39

def toprow
  @toprow
end

Instance Method Details

#addcol(num) ⇒ Object

2010-01-23 22:41



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 409

def addcol num #:nodoc:
  #@repaint_required = true
  @repaint_footer_required = true # 2010-01-23 22:41 
  if @form
    @form.addcol num
  else
    @parent_component.form && @parent_component.form.addcol(num)
  end
end

#addrowcol(row, col) ⇒ Object

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 418

def addrowcol row,col #:nodoc:
  #@repaint_required = true
  @repaint_footer_required = true # 2010-01-23 22:41 
  if @form
  @form.addrowcol row, col
  else
    @parent_component.form.addrowcol num
  end
end

#check_curpos ⇒ Object

newly added to check curpos when moving up or down



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 354

def check_curpos #:nodoc:
  @buffer = @list[@current_index]
  # if the cursor is ahead of data in this row then move it back
  if @pcol+@curpos > row_length
    addcol((@pcol+row_length-@curpos)+1)
    @curpos = row_length 
    maxlen = (@maxlen || @width-@internal_width)

    # even this row is gt maxlen, i.e., scrolled right
    if @curpos > maxlen
      @pcol = @curpos - maxlen
      @curpos = maxlen-1 
    else
      # this row is within maxlen, make scroll 0
      @pcol=0
    end
    set_form_col 
  end
end

#color_parser(f) ⇒ Object

supply with a color parser, if you supplied formatted text



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 452

def color_parser f
  $log.debug "XXX: parser setting color_parser to #{f} "
  #@window.color_parser f
  @color_parser = f
end

#current_value ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 243

def current_value
  @list[@current_index]
end

#cursor_backward ⇒ Object

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 427

def cursor_backward  #:nodoc:
  repeatm { 
  if @curpos > 0
    @curpos -= 1
    set_form_col 
    #addcol -1
  elsif @pcol > 0 
    @pcol -= 1   
  end
  }
  #@repaint_required = true
  @repaint_footer_required = true # 2010-01-23 22:41 
end

#cursor_forward ⇒ Object

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 395

def cursor_forward #:nodoc:
  maxlen = @maxlen || @width-@internal_width
  repeatm { 
  if @curpos < @width and @curpos < maxlen-1 # else it will do out of box
    @curpos += 1
    addcol 1
  else
    @pcol += 1 if @pcol <= row_length
  end
  }
  set_form_col 
  #@repaint_required = true
  @repaint_footer_required = true # 2010-01-23 22:41 
end

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

Deprecated.

Yields:

  • () 


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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 446

def do_relative_row num  #:nodoc:
  raise "unused will be removed"
  yield @list[@current_index+num] 
end

#edit_external ⇒ Object

edit content of textview in EDITOR and bring back NOTE: does not maintain content_type, so if you edit ansi text, it will come back in as normal text



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 712

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

#find_first_match(regex) ⇒ Object

returns row of first match of given regex (or nil if not found)



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 193

def find_first_match regex #:nodoc:
  @list.each_with_index do |row, ix|
    return ix if !row.match(regex).nil?
  end
  return nil
end

#fire_action_event ⇒ Object

on pressing ENTER we send user some info, the calling program would bind :PRESS – FIXME we can create this once and reuse ++



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 640

def fire_action_event
  return if @list.nil? || @list.size == 0
  require 'canis/core/include/ractionevent'
  aev = TextActionEvent.new self, :PRESS, current_value().to_s, @current_index, @curpos
  fire_handler :PRESS, aev
end

#formatted_text(text, fmt) ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 147

def formatted_text text, fmt
  require 'canis/core/include/chunk'
  @formatted_text = text
  @color_parser = fmt
  remove_all
end

#get_content ⇒ Object

FOR scrollable ###



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 218

def get_content
  @list
end

#get_window ⇒ Object

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 221

def get_window #:nodoc:
  @graphic
end

#getstr(prompt, maxlen = 80) ⇒ Object

this is just a test of prompting user for a string + as an alternative to the dialog.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 616

def getstr prompt, maxlen=80  #:nodoc:
  tabc = Proc.new {|str| Dir.glob(str +"*") }
  config={}; config[:tab_completion] = tabc
  config[:default] = "test"
  config[:display_length] = 11
  $log.debug " inside getstr before call "
  ret, str = rbgetstr(@form.window, @row+@height-1, @col+1, prompt, maxlen, config)
  $log.debug " rbgetstr returned #{ret} ,#{str}."
  return "" if ret != 0
  return str
end

#getvalue ⇒ Object

this sucks and should not be used but is everywhere, should use text()



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 240

def getvalue
  @list
end

#handle_key(ch) ⇒ Object

textview NOTE: i think this should return if list is nil or empty. No need to put

stuff into buffer and continue. will trouble other classes that extend.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 273

def handle_key ch #:nodoc:
  $log.debug " textview got ch #{ch} "
  @old_pcol = @pcol
  @buffer = @list[@current_index]
  if @buffer.nil? && row_count == 0
    @list << "\r"
    @buffer = @list[@current_index]
  end
  return if @buffer.nil?
  #$log.debug " before: curpos #{@curpos} blen: #{row_length}"
  if @curpos > row_length #@buffer.length
    addcol((row_length-@curpos)+1)
    @curpos = row_length
    set_form_col 
  end
  # We can improve later
  case ch
  when KEY_UP, ?k.getbyte(0)
    #select_prev_row
    ret = up
    # next removed as very irritating, can be configured if required 2011-11-2 
    #get_window.ungetch(KEY_BTAB) if ret == :NO_PREVIOUS_ROW
    check_curpos
    
  when KEY_DOWN, ?j.getbyte(0)
    ret = down
    # This should be configurable, or only if all rows are visible
    #get_window.ungetch(KEY_TAB) if ret == :NO_NEXT_ROW
    check_curpos
  #when KEY_LEFT, ?h.getbyte(0)
    #cursor_backward
  #when KEY_RIGHT, ?l.getbyte(0)
    #cursor_forward
  when ?\C-a.getbyte(0) #, ?0.getbyte(0)
    # take care of data that exceeds maxlen by scrolling and placing cursor at start
    @repaint_required = true if @pcol > 0 # tried other things but did not work
    set_form_col 0
    @pcol = 0
  when ?\C-e.getbyte(0), ?$.getbyte(0)
    # take care of data that exceeds maxlen by scrolling and placing cursor at end
    # This use to actually pan the screen to actual end of line, but now somewhere
    # it only goes to end of visible screen, set_form probably does a sanity check
    blen = row_length # @buffer.rstrip.length FIXME
    set_form_col blen
  when KEY_ENTER, FFI::NCurses::KEY_ENTER
    #fire_handler :PRESS, self
    fire_action_event
  when ?0.getbyte(0)..?9.getbyte(0)
    # FIXME the assumption here was that if numbers are being entered then a 0 is a number
    # not a beg-of-line command.
    # However, after introducing universal_argument, we can enters numbers using C-u and then press another
    # C-u to stop. In that case a 0 should act as a command, even though multiplier has been set
    if ch == ?0.getbyte(0) and $multiplier == 0
      # copy of C-a - start of line
      @repaint_required = true if @pcol > 0 # tried other things but did not work
      set_form_col 0
      @pcol = 0
      return 0
    end
    # storing digits entered so we can multiply motion actions
    $multiplier *= 10 ; $multiplier += (ch-48)
    return 0
  when ?\C-c.getbyte(0)
    $multiplier = 0
    return 0
  else
    # check for bindings, these cannot override above keys since placed at end
    begin
      ret = process_key ch, self
    rescue => err
      $log.error " TEXTVIEW ERROR #{err} "
      $log.debug(err.backtrace.join("\n"))
      textdialog [err.to_s, *err.backtrace], :title => "Exception"
    end
    return :UNHANDLED if ret == :UNHANDLED
  end
  $multiplier = 0 # you must reset if you've handled a key. if unhandled, don't reset since parent could use
  set_form_row
  return 0 # added 2010-01-12 22:17 else down arrow was going into next field
end

#init_actions ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 729

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

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 69

def init_vars #:nodoc:
  @curpos = @pcol = @toprow = @current_index = 0
  @repaint_all=true 
  @repaint_required=true 
  @widget_scrolled = true
  ## 2010-02-10 20:20 RFED16 taking care if no border requested
  @row_offset = @col_offset = 0 if @suppress_borders == true
  # added 2010-02-11 15:11 RFED16 so we don't need a form.
  $error_message_row ||= 23
  $error_message_col ||= 1
  # currently i scroll right only if  current line is longer than display width, i should use 
  # longest line on screen.
  @longest_line = 0 # the longest line printed on this page, used to determine if scrolling shd work
  @internal_width = 2
  @internal_width = 0 if @suppress_borders # NOTE bordertitle says 1

  @search_found_ix = nil # so old searches don't get highlighted
end

#load_module(requirename, includename) ⇒ Object

dynamically load a module and execute init method. Hopefully, we can get behavior like this such as vieditable or multibuffers



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 630

def load_module requirename, includename
  require "canis/#{requirename}"
  extend Object.const_get("#{includename}")
  send("#{requirename}_init") #if respond_to? "#{includename}_init"
end

#map_keys ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 87

def map_keys
  require 'canis/core/include/deprecated/listbindings'
  bindings()
  #bind_key([?\C-x, ?\C-s], :saveas)
  #bind_key([?\C-x, ?e], :edit_external)
  bind_key(32, 'scroll forward'){ scroll_forward() }
  # have placedhere so multi-bufer can override BS to prev buffer
  bind_keys([KEY_BACKSPACE,KEY_BSPACE,KEY_DELETE], :cursor_backward)
  #bind_key(?r) { getstr("Enter a word: ") } if $log.debug?
  #bind_key(?m, :disp_menu)                  if $log.debug?
end

#next_line ⇒ Object

Deprecated.

gives offset of next line, does not move



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 442

def next_line  #:nodoc:
  @list[@current_index+1]
end

#on_enter ⇒ Object

added 2010-09-30 18:48 so standard with other components, esp on enter NOTE: the on_enter repaint required causes this to be repainted 2 times if its the first object, once with the entire form, then with on_enter.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 654

def on_enter
  if @list.nil? || @list.size == 0
    Ncurses.beep
    return :UNHANDLED
  end
  on_enter_row @current_index
  set_form_row 
  @repaint_required = true
  super
  true
end

#on_enter_row(arow) ⇒ Object

called by listscrollable, used by scrollbar ENTER_ROW



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 647

def on_enter_row arow
  fire_handler :ENTER_ROW, self
  @repaint_required = true
end

#paint ⇒ Object

NOTE: earlier print_border was called only once in constructor, but when + a window is resized, and destroyed, then this was never called again, so the + border would not be seen in splitpane unless the width coincided exactly with + what is calculated in divider_location.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 464

def paint  #:nodoc:

  $log.debug "XXX TEXTVIEW repaint HAPPENING #{@current_index} "
  my_win = nil
  if @form
    my_win = @form.window
  else
    my_win = @target_window
  end
  @graphic = my_win unless @graphic
  if @formatted_text
    $log.debug "XXX:  INSIDE FORMATTED TEXT "

    # I don't want to do this in 20 places and then have to change
    # it and retest. Let me push it to util.
    l = Canis::Utils.parse_formatted_text(@color_parser,
                                           @formatted_text)

    #cp = Chunks::ColorParser.new @color_parser
    #l = []
    #@formatted_text.each { |e| l << cp.convert_to_chunk(e) }

    @old_content_type = @content_type
    text(l)
    @formatted_text = nil

  end

  print_borders if (@suppress_borders == false && @repaint_all) # do this once only, unless everything changes
  rc = row_count
  maxlen = @maxlen || @width-@internal_width
  #$log.debug " #{@name} textview repaint width is #{@width}, height is #{@height} , maxlen #{maxlen}/ #{@maxlen}, #{@graphic.name} roff #{@row_offset} coff #{@col_offset}" 
  tm = get_content
  tr = @toprow
  acolor = get_color $datacolor
  h = scrollatrow() 
  r,c = rowcol
  @longest_line = @width-@internal_width #maxlen
  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]
        # next call modified string. you may wanna dup the string.
        # rlistbox does
        # scrolling fails if you do not dup, since content gets truncated
        if content.is_a? String
          content = content.dup
          sanitize(content) if @sanitization_required
          truncate content
          @graphic.printstring  r+hh, c, "%-*s" % [@width-@internal_width,content], 
            acolor, @attr
        elsif content.is_a? Chunks::ChunkLine
          # clear the line first
          @graphic.printstring  r+hh, c, " "* (@width-@internal_width), 
            acolor, @attr
          # move back
          @graphic.wmove r+hh, c
          # either we have to loop through and put in default color and attr
          # or pass it to show_col
          a = get_attrib @attrib
          # FIXME this does not clear till the eol
          @graphic.show_colored_chunks content, acolor, a, @width-@internal_width, @pcol
        elsif content.is_a? Chunks::Chunk
          raise "TODO chunk in textview"
        elsif content.is_a? Array
            # several chunks in one row - NOTE Very experimental may change
          if content[0].is_a? Array
            # clearing the line since colored_chunks does not yet XXX FIXME if possible
            @graphic.printstring  r+hh, c, " "* (@width-@internal_width), 
              acolor, @attr
            @graphic.wmove r+hh, c
            # either we have to loop through and put in default color and attr
            # or pass it to show_col
            a = get_attrib @attrib
            # FIXME this does not clear till the eol
            # # NOTE 2013-03-08 - 17:37 pls add width to avoid overflow
            @graphic.show_colored_chunks content, acolor, a, @width-@internal_width
            #@graphic.show_colored_chunks content, acolor, a
          else
            # a single row chunk - NOTE Very experimental may change
            text = content[1].dup
            sanitize(text) if @sanitization_required
            truncate text
            @graphic.printstring  r+hh, c, "%-*s" % [@width-@internal_width,text], 
              content[0] || acolor, content[2] || @attr
          end
        end

        # highlighting search results.
        if @search_found_ix == tr+hh
          if !@find_offset.nil?
            # handle exceed bounds, and if scrolling
            if @find_offset1 < maxlen+@pcol and @find_offset > @pcol
            @graphic.mvchgat(y=r+hh, x=c+@find_offset-@pcol, @find_offset1-@find_offset, Ncurses::A_NORMAL, $reversecolor, nil)
            end
          end
        end

    else
      # clear rows
      @graphic.printstring r+hh, c, " " * (@width-@internal_width), acolor,@attr
    end
  end


  @repaint_required = false
  @repaint_footer_required = true
  @repaint_all = false 
  # 2011-10-15 
  @widget_scrolled = false
  @record_changed = false
  @property_changed = false
  @old_pcol = @pcol

end

#pipe_file ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 665

def pipe_file
  # TODO ask process name from user
  output = pipe_output 'munpack', @list
  if output && !output.empty?
    set_content output
  end
end

#pipe_output(pipeto, str) ⇒ Object

returns array of lines after running command on string passed TODO: need to close pipe other’s we’ll have a process lying around forever.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 675

def pipe_output (pipeto, str)
  case str
  when String
    #str = str.split "\n"
    # okay
  when Array
    str = str.join "\n"
  end
  #pipeto = '/usr/sbin/sendmail -t'
  #pipeto = %q{mail -s "my title" rahul}
  if pipeto != nil  # i was taking pipeto from a hash, so checking
    proc = IO.popen(pipeto, "w+")
    proc.puts str
    proc.close_write
    proc.readlines
  end
end

#print_foot ⇒ Object

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 210

def print_foot #:nodoc:
  @footer_attrib ||= Ncurses::A_REVERSE
  footer = "R: #{@current_index+1}, C: #{@curpos+@pcol}, #{@list.length} lines  "
  $log.debug " print_foot calling printstring with #{@row} + #{@height} -1, #{@col}+2"
  @graphic.printstring( @row + @height -1 , @col+2, footer, @color_pair || $datacolor, @footer_attrib) 
  @repaint_footer_required = false # 2010-01-23 22:55 
end

#remove_all ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 166

def remove_all
  @list = []
  init_vars
  @repaint_required = true
end

#repaint ⇒ Object

textview :nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 225

def repaint # textview :nodoc:
  #$log.debug "TEXTVIEW repaint r c #{@row}, #{@col}, key: #{$current_key}, reqd #{@repaint_required} "  

  #return unless @repaint_required # 2010-02-12 19:08  TRYING - won't let footer print for col move
  # TRYING OUT dangerous 2011-10-13 
  @repaint_required = false
  @repaint_required = true if @widget_scrolled || @pcol != @old_pcol || @record_changed || @property_changed

  paint if @repaint_required

  @repaint_footer_required = true if @oldrow != @current_index # 2011-10-15 
  print_foot if @print_footer && !@suppress_borders && @repaint_footer_required
end

#row_count ⇒ Object 



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 188

def row_count
  @list.length
end

#row_length ⇒ Object

determine length of row since we have chunks now. Since chunk implements length, so not required except for the old cases of demos that use an array.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 250

def row_length
  case @buffer
  when String
    @buffer.length
  when Chunks::ChunkLine
    return @buffer.length
  when Array
    # this is for those old cases like rfe.rb which sent in an array
    # (before we moved to chunks) 
    # line is an array of arrays
    if @buffer[0].is_a? Array
      result = 0
      @buffer.each {|e| result += e[1].length  }
      return result
    end
    # line is one single chunk
    return @buffer[1].length
  end
end

#rowcol ⇒ Object

returns the position where cursor was to be positioned by default It may no longer work like that.



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 201

def rowcol #:nodoc:
  return @row+@row_offset, @col+@col_offset
end

#sanitize(content) ⇒ Object

takes a block, this way anyone extending this class can just pass a block to do his job This modifies the string



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 583

def sanitize content  #:nodoc:

  if content.is_a? String
    content.chomp!
    # trying out since gsub giving #<ArgumentError: invalid byte sequence in UTF-8> 2011-09-11 
    
    content.replace(content.encode("ASCII-8BIT", :invalid => :replace, :undef => :replace, :replace => "?")) if content.respond_to?(:encode)
    content.gsub!(/[\t\n\r]/, '  ') # don't display tab or newlines
    content.gsub!(/[^[:print:]]/, '')  # don't display non print characters
  else
    content
  end
end

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



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 692

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

—- for listscrollable —- ##



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 181

def scrollatrow #:nodoc:
  if @suppress_borders
    @height - 1  # should be 2 FIXME but erasing lower line. see appemail
  else
    @height - 3 
  end
end

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

send in a list e.g. set_content File.open(“README.txt”,“r”).readlines set wrap at time of passing :WRAP_NONE :WRAP_WORD XXX if we widen the textview later, as in a vimsplit that data will sti1ll be wrapped at this width !!

2011-12-3 changed wrap to hash, so we can use content_type :ansi, :tmux



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 105

def set_content list, config = {} #wrap = :WRAP_NONE
  @content_type = config[:content_type]
  _title = config[:title]
  self.title = _title if _title
  if @content_type
    formatted_text list, @content_type
    return
  end
  # please note that content type is lost once formatted text does it's work
  @wrap_policy = config[:wrap]
  if list.is_a? String
    if @wrap_policy == :WRAP_WORD
      data = wrap_text list
      @list = data.split("\n")
    else
      @list = list.split("\n")
    end
  elsif list.is_a? Array
    if @wrap_policy == :WRAP_WORD
      data = wrap_text list.join(" ")
      @list = data.split("\n")
    else
      @list = list
    end
  else
    raise "set_content expects Array not #{list.class}"
  end
  init_vars
end

#set_form_col(col1 = @curpos) ⇒ Object

set cursor on correct column tview



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 374

def set_form_col col1=@curpos #:nodoc:
  @cols_panned ||= 0
  @pad_offset ||= 0 # added 2010-02-11 21:54 since padded widgets get an offset.
  @curpos = col1
  maxlen = @maxlen || @width-@internal_width
  #@curpos = maxlen if @curpos > maxlen
  if @curpos > maxlen
    @pcol = @curpos - maxlen
    @curpos = maxlen - 1
    @repaint_required = true # this is required so C-e can pan screen
  else
    @pcol = 0
  end
  # the rest only determines cursor placement
  win_col = 0 # 2010-02-07 23:19 new cursor stuff
  col2 = win_col + @col + @col_offset + @curpos + @cols_panned + @pad_offset
  $log.debug "TV SFC #{@name} setting c to #{col2} #{win_col} #{@col} #{@col_offset} #{@curpos} "
  #@form.setrowcol @form.row, col
  setrowcol nil, col2
  @repaint_footer_required = true
end

#text(*val) ⇒ Object

for consistency with other objects that respect text alias :text :set_content



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 136

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/deprecated/rtextview.rb', line 143

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

#top_row(*val) ⇒ Object

display this row on top



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 172

def top_row(*val) #:nodoc:
  if val.empty?
    @toprow
  else
    @toprow = val[0] || 0
  end
  @repaint_required = true
end

#truncate(content) ⇒ Object

returns only the visible portion of string taking into account display length and horizontal scrolling. MODIFIES STRING



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 598

def truncate content  #:nodoc:
  _maxlen = @maxlen || @width-@internal_width
  _maxlen = @width-@internal_width if _maxlen > @width-@internal_width # take care of decrease in width
  if !content.nil? 
    if content.length > _maxlen # only show maxlen
      @longest_line = content.length if content.length > @longest_line
      #content = content[@pcol..@pcol+maxlen-1] 
      content.replace(content[@pcol..@pcol+_maxlen-1] || "")
    else
      if @pcol > 0
          content.replace(content[@pcol..-1]  || "")
      end
    end
  end
  content
end

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

:nodoc:



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# File 'lib/canis/core/widgets/deprecated/rtextview.rb', line 204

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