Class: Rabbit::Canvas

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Enumerable, GetText
Defined in:
lib/rabbit/canvas.rb

Direct Known Subclasses

DependencyCanvas

Constant Summary collapse

INTERNAL_DPI = 
96.0

Constants included from GetText

GetText::DOMAIN

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from GetText

included

Constructor Details

#initialize(logger, renderer) ⇒ Canvas

Returns a new instance of Canvas.



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# File 'lib/rabbit/canvas.rb', line 157

def initialize(logger, renderer)
  @logger = logger
  @frame = NullFrame.new
  @theme_name = nil
  @saved_image_base_name = nil
  @saved_image_type = "png"
  @processing = false
  @quitted = false
  @parse_request_queue = []
  @apply_theme_request_queue = []
  @auto_redraw_timer = nil
  @output_html = false
  @rss_base_uri = nil
  @source_filename = nil
  @migemo_dictionary_search_path = []
  @migemo_dictionary_name = nil
  @limit_time = nil
  @use_gl = false
  @font_resolution_ratio = 1
  @max_n_comments = 100
  @allotted_time = nil
  @comment_theme = nil
  clear
  @renderer = renderer.new(self)
  @actions = Action.action_group(self)
end

Instance Attribute Details

#actions ⇒ Object (readonly)

Returns the value of attribute actions.



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# File 'lib/rabbit/canvas.rb', line 145

def actions
  @actions
end

#allotted_time ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 658

def allotted_time
  time = @allotted_time
  if time.nil? and title_slide
    time = title_slide.allotted_time
    if time.nil?
      start_time = title_slide.start_time
      end_time = title_slide.end_time
      if start_time and end_time
        start_time = Time.parse(start_time)
        end_time = Time.parse(end_time)
        time = end_time - start_time
      end
    end
  end
  Utils.ensure_time(time)
end

#comment_theme ⇒ Object

Returns the value of attribute comment_theme.



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# File 'lib/rabbit/canvas.rb', line 155

def comment_theme
  @comment_theme
end

#comments ⇒ Object (readonly)

Returns the value of attribute comments.



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# File 'lib/rabbit/canvas.rb', line 145

def comments
  @comments
end

#font_resolution_ratio ⇒ Object

Returns the value of attribute font_resolution_ratio.



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# File 'lib/rabbit/canvas.rb', line 154

def font_resolution_ratio
  @font_resolution_ratio
end

#last_modified ⇒ Object (readonly)

Returns the value of attribute last_modified.



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# File 'lib/rabbit/canvas.rb', line 144

def last_modified
  @last_modified
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/rabbit/canvas.rb', line 144

def logger
  @logger
end

#max_n_comments ⇒ Object

Returns the value of attribute max_n_comments.



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# File 'lib/rabbit/canvas.rb', line 155

def max_n_comments
  @max_n_comments
end

#migemo_dictionary_name ⇒ Object

Returns the value of attribute migemo_dictionary_name.



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# File 'lib/rabbit/canvas.rb', line 153

def migemo_dictionary_name
  @migemo_dictionary_name
end

#migemo_dictionary_search_path ⇒ Object

Returns the value of attribute migemo_dictionary_search_path.



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# File 'lib/rabbit/canvas.rb', line 153

def migemo_dictionary_search_path
  @migemo_dictionary_search_path
end

#output_html ⇒ Object

Returns the value of attribute output_html.



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# File 'lib/rabbit/canvas.rb', line 151

def output_html
  @output_html
end

#output_index_html ⇒ Object

Returns the value of attribute output_index_html.



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# File 'lib/rabbit/canvas.rb', line 151

def output_index_html
  @output_index_html
end

#renderer ⇒ Object (readonly)

Returns the value of attribute renderer.



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# File 'lib/rabbit/canvas.rb', line 144

def renderer
  @renderer
end

#rss_base_uri ⇒ Object

Returns the value of attribute rss_base_uri.



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# File 'lib/rabbit/canvas.rb', line 150

def rss_base_uri
  @rss_base_uri
end

#saved_image_base_name ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 449

def saved_image_base_name
  if @saved_image_base_name
    base_name = @saved_image_base_name.encode("UTF-8")
  else
    base_name = Filename.sanitize(title)
  end
  base_name << "-index" if index_mode?
  base_name
end

#saved_image_type ⇒ Object

Returns the value of attribute saved_image_type.



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# File 'lib/rabbit/canvas.rb', line 150

def saved_image_type
  @saved_image_type
end

#source_filename ⇒ Object

Returns the value of attribute source_filename.



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# File 'lib/rabbit/canvas.rb', line 152

def source_filename
  @source_filename
end

#use_gl=(value) ⇒ Object (writeonly)

Sets the attribute use_gl

Parameters:

  • value —

    the value to set the attribute use_gl to.



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# File 'lib/rabbit/canvas.rb', line 148

def use_gl=(value)
  @use_gl = value
end

Instance Method Details

#<<(slide) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 323

def <<(slide)
  slide.index = slides.size
  slides << slide
end

#action(name) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 639

def action(name)
  act = @actions.get_action(name)
  if act
    act
  else
    logger.warn(_("Unknown action: %s") % name)
    false
  end
end

#activate(name, &block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 629

def activate(name, &block)
  act = action(name)
  if act and act.sensitive?
    act.activate(&block)
    true
  else
    false
  end
end

#append_comment(comment) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 612

def append_comment(comment)
  @comments << comment
  @comments.shift if @comments.size > @max_n_comments
  @on_comment_callbacks.each do |name, callback|
    begin
      callback.call(comment)
    rescue
      logger.error($!)
    end
  end
  true
end

#apply_theme(name = nil, &block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 328

def apply_theme(name=nil, &block)
  _apply_theme(name, Object.new.__id__, &block)
end

#apply_timer ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 687

def apply_timer
  return unless title_slide

  start_time = title_slide.start_time
  end_time = title_slide.end_time
  return if start_time.nil?
  return if end_time.nil?

  start_time = Time.parse(start_time)
  end_time = Time.parse(end_time)
  return unless (start_time..end_time).cover?(Time.now)

  @allotted_time = end_time - start_time
  @limit_time = end_time
end

#applying? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 192

def applying?
  not @apply_theme_request_queue.empty?
end

#attach_to(frame, window, container = nil, &block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 209

def attach_to(frame, window, container=nil, &block)
  @frame = frame if frame
  @renderer.attach_to(window, container, &block) if window
end

#cache_all_slides ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 571

def cache_all_slides
  process do
    @renderer.cache_all_slides
  end
end

#change_current_index(new_index) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 295

def change_current_index(new_index)
  mode = @index_mode
  if mode
    index = @index_current_index
    @index_current_index = new_index
  else
    index = @current_index
    @current_index = new_index
  end
  if 0 <= current_index and current_index < slide_size
    yield
  end
ensure
  if mode
    @index_current_index = index
  else
    @current_index = index
  end
end

#current_index ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 287

def current_index
  if @index_mode
    @index_current_index
  else
    @current_index
  end
end

#current_slide ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 277

def current_slide
  slide = slides[current_index]
  if slide
    slide
  else
    move_to_first
    slides.first
  end
end

#delete_on_comment_proc_by_name(name) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 606

def delete_on_comment_proc_by_name(name)
  @on_comment_callbacks.reject! do |callback_name, callback|
    callback_name == name
  end
end

#detach ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 214

def detach
  @frame = NullFrame.new
  @renderer.detach
end

#each(&block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 319

def each(&block)
  slides.each(&block)
end

#find_slide(pattern) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 254

def find_slide(pattern)
  slides.find {|slide| slide.match?(pattern)}
end

#first_slide? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 543

def first_slide?
  current_index.zero?
end

#font_resolution ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 703

def font_resolution
  INTERNAL_DPI * @font_resolution_ratio
end

#front(public_level = nil) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 205

def front(public_level=nil)
  Front.new(self, public_level)
end

#full_path(path) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 395

def full_path(path)
  @source and @source.full_path(path)
end

#fullscreened ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 429

def fullscreened
  @renderer.post_fullscreen
end

#have_next? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 565

def have_next?
  return true if have_next_slide?
  return !current_slide.last? if current_slide
  false
end

#have_next_slide? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 561

def have_next_slide?
  slide_size - 1 > current_index
end

#have_previous? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 555

def have_previous?
  return true if have_previous_slide?
  return !current_slide.first? if current_slide
  false
end

#have_previous_slide? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 551

def have_previous_slide?
  0 < current_index
end

#iconified ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 437

def iconified
  @renderer.post_iconify
end

#index_mode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 506

def index_mode?
  @index_mode
end

#last_slide? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 547

def last_slide?
  slide_size.zero? or current_index == (slide_size - 1)
end

#merge_theme(name) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 336

def merge_theme(name)
  unless @slides.empty?
    manager = Theme::Manager.new(self)
    manager.apply(name)
    @renderer.post_apply_theme
  end
end

#move_to_first ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 498

def move_to_first
  move_to_if_can(0)
end

#move_to_if_can(index) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 459

def move_to_if_can(index)
  if index and 0 <= index and index < slide_size
    move_to(index)
  end
  current_index
end

#move_to_last ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 502

def move_to_last
  move_to(slide_size - 1)
end

#move_to_next_if_can ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 466

def move_to_next_if_can
  slide = current_slide
  if slide and !slide.last?
    old_index = slide.drawing_index
    slide.move_to_next
    Action.update_status(self)
    @renderer.post_move_in_slide(old_index, slide.drawing_index)
  else
    move_to_next_slide_if_can
  end
end

#move_to_next_slide_if_can ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 478

def move_to_next_slide_if_can
  move_to_if_can(current_index + 1)
end

#move_to_previous_if_can ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 482

def move_to_previous_if_can
  slide = current_slide
  if slide and !slide.first?
    old_index = slide.drawing_index
    slide.move_to_previous
    Action.update_status(self)
    @renderer.post_move_in_slide(old_index, slide.drawing_index)
  else
    move_to_previous_slide_if_can
  end
end

#move_to_previous_slide_if_can ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 494

def move_to_previous_slide_if_can
  move_to_if_can(current_index - 1)
end

#need_reload_source? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 391

def need_reload_source?
  !@processing and @source and @source.modified?
end

#next_slide ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 315

def next_slide
  slides[current_index + 1]
end

#on_comment(name, &callback) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 602

def on_comment(name, &callback)
  @on_comment_callbacks << [name, callback]
end

#parse(source = nil, callback = nil, &block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 348

def parse(source=nil, callback=nil, &block)
  id = Object.new.__id__
  @parse_request_queue.push(id)
  @source = source || @source
  begin
    index = current_index
    current_allotted_time = allotted_time
    keep_index do
      @renderer.pre_parse
      clear
      Parser.parse(self, @source)
      new_allotted_time = allotted_time
      reset_timer if new_allotted_time != current_allotted_time
      apply_timer
      set_current_index(index)
      reload_theme do
        if @parse_request_queue.last != id
          raise ParseFinish
        end
        callback.call if callback
      end
      @renderer.post_parse
      index = current_index
    end
    set_current_index(index)
  rescue ParseFinish
  rescue ParseError, UnsupportedFormatError
    if block_given?
      yield($!)
    else
      logger.warn($!.message)
    end
  ensure
    @parse_request_queue.delete_if {|x| x == id}
  end
end

#parsing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 188

def parsing?
  not @parse_request_queue.empty?
end

#post_terminal ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 445

def post_terminal
  @renderer.post_terminal
end

#pre_terminal ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 441

def pre_terminal
  @renderer.pre_terminal
end

#print(&block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 423

def print(&block)
  process do
    @renderer.print(&block)
  end
end

#processing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 577

def processing?
  @processing
end

#quit ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 200

def quit
  @quitted = true
  @frame.quit
end

#quitted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 184

def quitted?
  @quitted
end

#reload_source(callback = nil, &block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 385

def reload_source(callback=nil, &block)
  if need_reload_source?
    parse(nil, callback, &block)
  end
end

#reload_theme(&block) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 344

def reload_theme(&block)
  apply_theme(@theme_name, &block)
end

#reset_timer ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 683

def reset_timer
  @limit_time = nil
end

#rest_time ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 679

def rest_time
  @limit_time ? @limit_time - Time.now : nil
end

#save_as_image ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 409

def save_as_image
  process do
    generator = HTML::Generator.new(self,
                                    saved_image_base_name,
                                    @saved_image_type,
                                    @output_html,
                                    @output_index_html,
                                    @rss_base_uri)
    generator.pdf_filename = filename if /\.pdf\z/i =~ filename.to_s
    generator.source_filename = @source_filename
    generator.save
  end
end

#slide_index(pattern) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 258

def slide_index(pattern)
  slides.each_with_index do |slide, i|
    return i if slide.match?(pattern)
  end
  nil
end

#slide_indexes(pattern) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 265

def slide_indexes(pattern)
  indexes = []
  slides.each_with_index do |slide, i|
    indexes << i if slide.match?(pattern)
  end
  indexes
end

#slide_size ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 273

def slide_size
  slides.size
end

#slide_text(index = current_index) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 239

def slide_text(index=current_index)
  return "" if slides.empty?
  slide = slides[index]
  return "" if slide.nil?
  slide.text.strip
end

#slide_title(index = current_index) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 228

def slide_title(index=current_index)
  return "" if slides.empty?
  slide = slides[index]
  return title if slide.nil?
  if slide.is_a?(Element::TitleSlide)
    slide.title
  else
    "#{title}: #{slide.title}"
  end
end

#slides ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 246

def slides
  if @index_mode
    @index_slides
  else
    @slides
  end
end

#source ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 539

def source
  @source.read
end

#source_force_modified(force_modified) {|@source| ... } ⇒ Object

Yields:



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# File 'lib/rabbit/canvas.rb', line 532

def source_force_modified(force_modified)
  prev = @source.force_modified
  @source.force_modified = force_modified
  yield @source
  @source.force_modified = prev
end

#start_auto_redraw_timer(interval) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 581

def start_auto_redraw_timer(interval)
  stop_auto_redraw_timer
  timer = GLib::Timeout.add(interval * 1000) do
    if quitted?
      @auto_redraw_timer = nil
      GLib::Source::REMOVE
    else
      activate("Redraw")
      GLib::Source::CONTINUE
    end
  end
  @auto_redraw_timer = timer
end

#start_timer(limit) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 675

def start_timer(limit)
  @limit_time = Time.now + limit
end

#stop_auto_redraw_timer ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 595

def stop_auto_redraw_timer
  if @auto_redraw_timer
    GLib::Source.remove(@auto_redraw_timer)
    @auto_redraw_timer = nil
  end
end

#theme_name ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 332

def theme_name
  @theme_name || default_theme || "default"
end

#title ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 219

def title
  ts = title_slide
  if ts
    ts.title
  else
    "Rabbit"
  end
end

#title_slide ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 625

def title_slide
  @slides.find{|x| x.is_a?(Element::TitleSlide)}
end

#tmp_dir_name ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 399

def tmp_dir_name
  @source and @source.tmp_dir_name
end

#to_pixbuf(i) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 403

def to_pixbuf(i)
  move_to_if_can(i)
  current_slide.flush
  @renderer.to_pixbuf(current_slide)
end

#toggle_index_mode ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 510

def toggle_index_mode
  @renderer.pre_toggle_index_mode
  process do
    if @index_mode
      @index_mode = false
      @renderer.index_mode_off
    else
      update_index_slides
      @index_mode = true
      @renderer.index_mode_on
    end
    modified
  end
  @renderer.post_toggle_index_mode
end

#unfullscreened ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 433

def unfullscreened
  @renderer.post_unfullscreen
end

#update_index_slides ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 526

def update_index_slides
  if @index_slides.empty?
    @index_slides = Element::IndexSlide.make_index_slides(self)
  end
end

#use_gl? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/canvas.rb', line 196

def use_gl?
  @use_gl
end

#with_index_mode(new_value) ⇒ Object 



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# File 'lib/rabbit/canvas.rb', line 649

def with_index_mode(new_value)
  current_index_mode = @index_mode
  @index_mode = new_value
  update_index_slides if @index_mode
  yield
ensure
  @index_mode = current_index_mode
end