Class: Glimmer::Tk::TextProxy

Inherits:
WidgetProxy show all
Includes:
Scrollable
Defined in:
lib/glimmer/tk/text_proxy.rb

Overview

Proxy for Tk::Text

Follows the Proxy Design Pattern

Constant Summary collapse

ALL_TAG = 
'__all__'
FORMAT_DEFAULT_MAP = 
{
  'justify' => 'left',
}

Constants inherited from WidgetProxy

WidgetProxy::FONTS_PREDEFINED

Instance Attribute Summary

Attributes inherited from WidgetProxy

#args, #children, #keyword, #on_drag_motion_block, #parent_proxy, #tk

Instance Method Summary collapse

Methods included from Scrollable

#xscrollcommand_block=, #yscrollcommand_block=

Methods inherited from WidgetProxy

#add_observer, #ancestor_proxies, #apply_style, #attribute_setter, #content, create, #destroy, #drag_source=, #font=, #get_attribute, #grid, #has_attribute?, #has_attributes_attribute?, #has_state?, #image_argument, #index_in_parent, #initialize, #make_draggable, #make_non_draggable, #method_missing, #on, #on_drag_start_block=, #on_drop_block=, #post_add_content, #post_initialize_child, #respond_to?, #root_parent_proxy, #set_attribute, #style=, #textvariable_defined?, tk_widget_class_for, #tk_widget_has_attribute_getter_setter?, #tk_widget_has_attribute_setter?, #toplevel_parent_proxy, #widget_attribute_listener_installers, #widget_custom_attribute_mapping, widget_exists?, widget_proxy_class

Constructor Details

This class inherits a constructor from Glimmer::Tk::WidgetProxy

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Glimmer::Tk::WidgetProxy

Instance Method Details

#add_font_format(region_start, region_end, font_option, value) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 275

def add_font_format(region_start, region_end, font_option, value)
  applied_font_format_tags_and_regions(region_start, region_end).each do |tag, tag_region_start, tag_region_end|
    if tag
      bigger_region_tag = @tk.tag_ranges(tag).any? do |range_start, range_end|
        text_index_less_than_other_text_index?(range_start, tag_region_start) || text_index_greater_than_other_text_index?(range_end, tag_region_end)
      end
      if bigger_region_tag
        @tk.tag_ranges(tag).each do |range_start, range_end|
          if text_index_less_than_other_text_index?(range_start, tag_region_start) && text_index_less_than_or_equal_to_other_text_index?(range_end, tag_region_end) && text_index_greater_than_or_equal_to_other_text_index?(range_end, tag_region_start)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(range_start, tag_region_start, 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", value)
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          elsif text_index_greater_than_other_text_index?(range_end, tag_region_end) && text_index_greater_than_or_equal_to_other_text_index?(range_start, tag_region_start) && text_index_less_than_or_equal_to_other_text_index?(range_start, tag_region_end)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(tag_region_end, range_end, 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", value)
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          elsif text_index_less_than_other_text_index?(range_start, tag_region_start) && text_index_greater_than_other_text_index?(range_end, tag_region_end)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(range_start, tag_region_start, 'font', font)
            remove_format(range_start, range_end, 'font', font)
            add_format(tag_region_end, range_end, 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", value)
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          end
        end
      else
        current_font = @tk.tag_cget(tag, 'font')
        current_font.send("#{font_option}=", value)
      end
    else
      add_format(tag_region_start, tag_region_end, 'font', default_font_attributes.merge(font_option => value))
    end
  end
end

#add_format(region_start, region_end, option, value) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 177

def add_format(region_start, region_end, option, value)
  @@tag_number = 0 unless defined?(@@tag_number)
  tag = "tag_#{option}_#{@@tag_number += 1}"
  @tk.tag_configure(tag, {option => value})
  @tk.tag_add(tag, region_start, region_end)
  tag
end

#add_selection_font_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 110

def add_selection_font_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| add_font_format(range_start, range_end, option, value) }
end

#add_selection_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 98

def add_selection_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| add_format(range_start, range_end, option, value) }
end

#add_to_text_index(text_index, addition) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 378

def add_to_text_index(text_index, addition)
  text_index_parts = text_index.split('.')
  line = text_index_parts.first
  char_index = text_index_parts.last
  char_index = char_index.to_i + addition
  "#{line}.#{char_index}"
end

#applied_font_format?(region_start, region_end, font_option, value) ⇒ Boolean

TODO Algorithm for font option formatting for a region, grab all the latest tags for each subregion as well as the widget font for subregions without a tag for each part of the region covered by a tag, augment its font with new font option (or remove if that is what is needed) Once add and remove are implemented, implement toggle Also, there is a need for a method that checks if a font option value applies to an entire region (to decide which way to toggle with toggle method)

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 217

def applied_font_format?(region_start, region_end, font_option, value)
  applied_font_format_tags_and_regions(region_start, region_end).all? do |tag, region_start, region_end|
    if tag.nil?
      @tk.font.send(font_option) == value
    else
      @tk.tag_cget(tag, 'font').send(font_option) == value
    end
  end
end

#applied_font_format_tags_and_regions(region_start, region_end) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 227

def applied_font_format_tags_and_regions(region_start, region_end)
  lines = value.split("\n")
  tags_and_regions = []
  all_tag_names = (@tk.tag_names - ['sel', ALL_TAG]).select {|tag_name| tag_name.include?('_font_')}
  (region_start.to_i..region_end.to_i).each do |line_number|
    start_character_index = 0
    start_character_index = region_start.to_s.split('.').last.to_i if line_number == region_start.to_i
    end_character_index = lines[line_number - 1].to_s.size
    end_character_index = region_end.to_s.split('.').last.to_i if line_number == region_end.to_i
    (start_character_index...end_character_index).each do |character_index|
      text_index = "#{line_number}.#{character_index}"
      region_tag = all_tag_names.reverse.find do |tag|
        @tk.tag_cget(tag, 'font') && @tk.tag_ranges(tag).any? do |range_start, range_end|
          text_index_less_than_or_equal_to_other_text_index?(range_start, text_index) && text_index_greater_than_or_equal_to_other_text_index?(range_end, text_index)
        end
      end
      end_text_index = add_to_text_index(text_index, 1)
      if tags_and_regions&.last && region_tag == tags_and_regions.last.first
        tags_and_regions.last[2] = end_text_index
      else
        tags_and_regions << [region_tag, text_index, end_text_index]
      end
    end
  end
  tags_and_regions
end

#applied_font_format_value(text_index = nil, font_option) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 254

def applied_font_format_value(text_index = nil, font_option)
  text_index ||= @tk.index('insert')
  region_start = text_index
  region_end = @tk.index("#{text_index} + 1 chars")
  tag_names = applied_font_format_tags_and_regions(region_start, region_end).map(&:first)
  
  values = tag_names.map do |tag_name|
    @tk.tag_ranges(tag_name).map do |range|
      if text_index_less_than_or_equal_to_other_text_index?(range.first, region_start) && text_index_greater_than_or_equal_to_other_text_index?(range.last, region_end)
        @tk.tag_cget(tag_name, 'font')
      end
    end
  end.flatten.reject {|value| value.to_s.empty?}
  
  font = values.last
  
  value = font && font.send(font_option)
  
  value || Hash[@tk.font.actual][font_option]
end

#applied_format?(region_start, region_end, option, value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 144

def applied_format?(region_start, region_end, option, value)
  !applied_format_tags(region_start, region_end, option, value).empty?
end

#applied_format_tags(region_start, region_end, option, value) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 148

def applied_format_tags(region_start, region_end, option, value)
  tag_names = @tk.tag_names - ['sel', ALL_TAG]
  
  tag_names.select do |tag_name|
    @tk.tag_ranges(tag_name).any? do |range|
      if text_index_less_than_or_equal_to_other_text_index?(range.first, region_start) && text_index_greater_than_or_equal_to_other_text_index?(range.last, region_end)
        @tk.tag_cget(tag_name, option) == value
      end
    end
  end
end

#applied_format_value(text_index = nil, option) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 160

def applied_format_value(text_index = nil, option)
  text_index ||= @tk.index('insert')
  region_start = text_index
  region_end = text_index
  tag_names = @tk.tag_names - ['sel', ALL_TAG]
  
  values = tag_names.map do |tag_name|
    @tk.tag_ranges(tag_name).map do |range|
      if text_index_less_than_or_equal_to_other_text_index?(range.first, region_start) && text_index_greater_than_or_equal_to_other_text_index?(range.last, region_end)
        @tk.tag_cget(tag_name, option)
      end
    end
  end.flatten.reject {|value| value.to_s.empty?}
  
  values.last || (@tk.send(option) rescue FORMAT_DEFAULT_MAP[option])
end

#default_font_attributes ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 374

def default_font_attributes
  Hash[@tk.font.actual]
end

#default_for_font_option(font_option) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 370

def default_for_font_option(font_option)
  @tk.font.send(font_option)
end

#edit_redo ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 90

def edit_redo
  begin
    @tk.edit_redo
  rescue => e
    # No Op
  end
end

#edit_undo ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 81

def edit_undo
  # <Modified> fires twice the first time, which is equivalent to one change.
  if @modified_count.to_i > 2
    # must count the extra 2 modified count that will occur upon undo too
    @modified_count -= 4
    @tk.edit_undo
  end
end

#get_open_file_to_insert_image(text_index = 'insert') ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 426

def get_open_file_to_insert_image(text_index = 'insert')
  image_filename = Glimmer::DSL::Tk::BuiltInDialogExpression.new.interpret(nil, 'get_open_file', filetypes: {
    'PNG Images' => '.png',
    'Gif Images' => '.gif',
    'PPM Images' => '.ppm'
  })
  insert_image('insert', image_filename) unless image_filename.nil? || image_filename.to_s.empty?
end

#handle_listener(listener_name, &listener) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 38

def handle_listener(listener_name, &listener)
  case listener_name.to_s.downcase
  when '<<modified>>', '<modified>', 'modified'
    modified_listener = Proc.new do |*args|
      @modified_count ||= 0
      @modified_count += 1
      listener.call(*args)
      @insert_mark_moved_proc&.call
      @tk.modified = false
    end
    @tk.bind('<Modified>', modified_listener)
  when '<<selection>>', '<selection>', 'selection'
    @tk.bind('<Selection>', listener)
  when 'destroy'
    super
  when 'insertmarkmove', 'insertmarkmoved', 'insert_mark_move', 'insert_mark_moved'
    if @insert_mark_moved_proc.nil?
      handle_listener('KeyPress') do |event|
        @insert_mark_moved_proc&.call
      end
      handle_listener('KeyRelease') do |event|
        @insert_mark_moved_proc&.call
      end
      handle_listener('ButtonPress') do |event|
        @insert_mark_moved_proc&.call
      end
      handle_listener('ButtonRelease') do |event|
        @insert_mark_moved_proc&.call
      end
    end
    @insert_mark = @tk.index('insert')
    @insert_mark_moved_proc = Proc.new do
      new_insert_mark = @tk.index('insert')
      if new_insert_mark != @insert_mark
        @insert_mark = new_insert_mark
        listener.call(new_insert_mark)
      end
    end
  else
    super
  end
end

#insert_image(text_index, *image_args) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 422

def insert_image(text_index, *image_args)
  TkTextImage.new(@tk, 'insert', :image => image_argument(image_args))
end

#process_selection_ranges(no_selection_default: :insert_word, focus: true, &processor) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 122

def process_selection_ranges(no_selection_default: :insert_word, focus: true, &processor)
  regions = @tk.tag_ranges('sel')
  if regions.empty?
    case no_selection_default
    when :insert_word
      regions = [[@tk.index('insert wordstart'), @tk.index('insert wordend + 1 char')]]
    when :insert_letter
      regions = [[@tk.index('insert'), @tk.index('insert + 1 char')]]
    end
  end
  regions.each do |region|
    range_start = region.first
    range_end = region.last
    processor.call(range_start, range_end)
  end
  if focus == true
    @tk.focus
  elsif focus.is_a?(Integer)
    ::Tk.after(focus) { @tk.focus }
  end
end

#remove_font_format(region_start, region_end, font_option, value) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 318

def remove_font_format(region_start, region_end, font_option, value)
  applied_font_format_tags_and_regions(region_start, region_end).each do |tag, tag_region_start, tag_region_end|
    if tag
      bigger_region_tag = @tk.tag_ranges(tag).any? do |range_start, range_end|
        text_index_less_than_other_text_index?(range_start, tag_region_start) || text_index_greater_than_other_text_index?(range_end, tag_region_end)
      end
      if bigger_region_tag
        @tk.tag_ranges(tag).each do |range_start, range_end|
          if text_index_less_than_other_text_index?(range_start, tag_region_start) && text_index_less_than_or_equal_to_other_text_index?(range_end, tag_region_end) && text_index_greater_than_or_equal_to_other_text_index?(range_end, tag_region_start)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(range_start, subtract_from_text_index(tag_region_start, 1), 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", default_for_font_option(font_option))
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          elsif text_index_greater_than_other_text_index?(range_end, tag_region_end) && text_index_greater_than_or_equal_to_other_text_index?(range_start, tag_region_start) && text_index_less_than_or_equal_to_other_text_index?(range_start, tag_region_end)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(add_to_text_index(tag_region_end, 1), range_end, 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", default_for_font_option(font_option))
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          elsif text_index_less_than_other_text_index?(range_start, tag_region_start) && text_index_greater_than_other_text_index?(range_end, tag_region_end)
            font = @tk.tag_cget(tag, 'font')
            remove_format(range_start, range_end, 'font', font)
            add_format(range_start, subtract_from_text_index(tag_region_start, 1), 'font', font)
            remove_format(range_start, range_end, 'font', font)
            add_format(add_to_text_index(tag_region_end, 1), range_end, 'font', font)
            font_clone = clone_font(font)
            font_clone.send("#{font_option}=", default_for_font_option(font_option))
            add_format(tag_region_start, tag_region_end, 'font', font_clone)
          end
        end
      else
        current_font = @tk.tag_cget(tag, 'font')
        current_font.send("#{font_option}=", default_for_font_option(font_option))
      end
    else
      add_format(tag_region_start, tag_region_end, 'font', default_font_attributes.merge(font_option => default_for_font_option(font_option)))
    end
  end
end

#remove_format(region_start, region_end, option, value) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 185

def remove_format(region_start, region_end, option, value)
  partial_intersection_option_applied_tags = tag_names.select do |tag_name|
    @tk.tag_ranges(tag_name).any? do |range|
      if range.first.to_f.between?(region_start.to_f, region_end.to_f) or
         range.last.to_f.between?(region_start.to_f, region_end.to_f) or
         (text_index_less_than_or_equal_to_other_text_index?(range.first, region_start) && text_index_greater_than_or_equal_to_other_text_index?(range.last, region_end))
        @tk.tag_cget(tag_name, option) == value
      end
    end
  end
  
  partial_intersection_option_applied_tags.each do |tag_name|
    @tk.tag_remove(tag_name, region_start, region_end)
  end
  
  nil
end

#remove_selection_font_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 114

def remove_selection_font_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| remove_font_format(range_start, range_end, option, value) }
end

#remove_selection_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 102

def remove_selection_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| remove_format(range_start, range_end, option, value) }
end

#subtract_from_text_index(text_index, subtraction) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 386

def subtract_from_text_index(text_index, subtraction)
  add_to_text_index(text_index, -1 * subtraction)
end

#text_index_greater_than_or_equal_to_other_text_index?(region1, region2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 414

def text_index_greater_than_or_equal_to_other_text_index?(region1, region2)
  region1_parts = region1.to_s.split('.')
  region2_parts = region2.to_s.split('.')
  return true if region1_parts.first.to_i > region2_parts.first.to_i
  return false if region1_parts.first.to_i < region2_parts.first.to_i
  region1_parts.last.to_i >= region2_parts.last.to_i
end

#text_index_greater_than_other_text_index?(region1, region2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 406

def text_index_greater_than_other_text_index?(region1, region2)
  region1_parts = region1.to_s.split('.')
  region2_parts = region2.to_s.split('.')
  return true if region1_parts.first.to_i > region2_parts.first.to_i
  return false if region1_parts.first.to_i < region2_parts.first.to_i
  region1_parts.last.to_i > region2_parts.last.to_i
end

#text_index_less_than_or_equal_to_other_text_index?(region1, region2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 398

def text_index_less_than_or_equal_to_other_text_index?(region1, region2)
  region1_parts = region1.to_s.split('.')
  region2_parts = region2.to_s.split('.')
  return true if region1_parts.first.to_i < region2_parts.first.to_i
  return false if region1_parts.first.to_i > region2_parts.first.to_i
  region1_parts.last.to_i <= region2_parts.last.to_i
end

#text_index_less_than_other_text_index?(region1, region2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/tk/text_proxy.rb', line 390

def text_index_less_than_other_text_index?(region1, region2)
  region1_parts = region1.to_s.split('.')
  region2_parts = region2.to_s.split('.')
  return true if region1_parts.first.to_i < region2_parts.first.to_i
  return false if region1_parts.first.to_i > region2_parts.first.to_i
  region1_parts.last.to_i < region2_parts.last.to_i
end

#toggle_font_format(region_start, region_end, option, value) ⇒ Object

toggles option/value tag (removes if already applied)



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# File 'lib/glimmer/tk/text_proxy.rb', line 362

def toggle_font_format(region_start, region_end, option, value)
  if applied_font_format?(region_start, region_end, option, value)
    remove_font_format(region_start, region_end, option, value)
  else
    add_font_format(region_start, region_end, option, value)
  end
end

#toggle_format(region_start, region_end, option, value) ⇒ Object

toggles option/value tag (removes if already applied)



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# File 'lib/glimmer/tk/text_proxy.rb', line 204

def toggle_format(region_start, region_end, option, value)
  if applied_format?(region_start, region_end, option, value)
    remove_format(region_start, region_end, option, value)
  else
    add_format(region_start, region_end, option, value)
  end
end

#toggle_selection_font_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 118

def toggle_selection_font_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| toggle_font_format(range_start, range_end, option, value) }
end

#toggle_selection_format(option, value, no_selection_default: :insert_word, focus: true) ⇒ Object 



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# File 'lib/glimmer/tk/text_proxy.rb', line 106

def toggle_selection_format(option, value, no_selection_default: :insert_word, focus: true)
  process_selection_ranges(no_selection_default: no_selection_default, focus: focus) { |range_start, range_end| toggle_format(range_start, range_end, option, value) }
end