Class: VivlioPack::Renderer

Inherits:
Redcarpet::Render::HTML
  • Object
show all
Includes:
Rouge::Plugins::Redcarpet
Defined in:
lib/vivlio_pack/renderer.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/vivlio_pack/renderer.rb', line 17

def initialize
  super
  @sec = 0
  @ch = 0
  @para = 0
  @state = []
  @ring_buffer = []
end

Class Method Details

.add_plugin(name, mod) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 9

def self.add_plugin(name, mod)
  (@plugins ||= {})[name] = mod
end

.plugin(name) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 13

def self.plugin(name)
  @plugins[name]
end

Instance Method Details

#block_code(code, language) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 96

def block_code(code, language)
  if @in_file
    @in_file = false
    lineno = @file_lineno || 1
    lexer = Rouge::Lexer.find_fancy(language) || Rouge::Lexers::PlainText.new
    formatter = Rouge::Formatters::HTML.new
    lines = code.split("\n")
    numbered_lines = lines.each_with_index.map do |line, i|
      highlighted_line = formatter.format(lexer.lex(line))
      "<span class='code-line'><span class='line-number'>#{(lineno + i).to_s.rjust(4)}</span>#{highlighted_line}</span>"
    end
    "<div class='file'><div class='filename'>#{@file_filename}:#{lineno}</div><pre class='highlight'><code>#{numbered_lines.join}</code></pre></div>\n"
  else
    super
  end
end

#header(c, level) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 26

def header(c, level)
  case level
  when 1
    @sec += 1
    @ch = 0
    @para = 0
    "<h1 id='sec#{@sec}'>#{c}</h1>\n\n"
  when 2
    @ch += 1
    @para = 0
    "<h2 id='ch#{@sec}-#{@ch}'>#{c}</h2>\n\n"
  when 3
    @para += 1
    "<h3 id='para#{@sec}-#{@ch}-#{@para}'>#{c}</h3>\n\n"
  when 4
    "<h4>#{c}</h4>\n\n"
  end
end

#hrule ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 130

def hrule
  "<div class='page-break'></div>\n"
end

#image(link, title, alt_text) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 113

def image(link, title, alt_text)
  name = File.basename(link, ".*")
  size_class = ""
  caption = alt_text
  if alt_text =~ /\A(.+?)\s*"(\d+)%"\s*\z/
    caption = $1.strip
    size_class = "img-#{$2}"
  end
  figure_attr = size_class.empty? ? "" : " class=\"#{size_class}\""
  <<~HTML
    <figure#{figure_attr}>
      <img src="contents/images/#{link}" alt="#{caption}" />
      <figcaption id="#{name}">#{caption}</figcaption>
    </figure>
  HTML
end

#onepoint(text) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 134

def onepoint(text)
  case text.strip
  when "[begin one-point]"
    return "<img src='images/onepoint_before.png' class='onepoint'>\n"
  when "[end one-point]"
    return "<img src='images/onepoint_after.png' class='onepoint'>\n"
  end
end

#paragraph(text) ⇒ Object 



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# File 'lib/vivlio_pack/renderer.rb', line 45

def paragraph(text)
  @ring_buffer.push text
  @ring_buffer.shift if @ring_buffer.length > 5
  case text.strip
  when /\A\[file (?<filename>(\w+\/)*(\w+)\.(\w+))(:(?<lineno>\d+))?\]$/
    @in_file = true
    filename = $~[:filename]
    @file_lineno = $~[:lineno] ? $~[:lineno].to_i : 1
    @file_filename = filename
    return ""
  when "[page break]"
    return "<div class='page-break'></div>\n"
  when /\A%([a-z][a-z0-9\-]*):(.*)/m
    return "<div class='#{$1}'>#{$2}</div>\n"
  when /\A\[begin\s+(\w+)(\s+(.+))?\]\z/
    plugin_name = $~[1]
    plugin = Renderer.plugin(plugin_name)
    if plugin
      @state.push plugin_name
      result = plugin.process_begin($~[3])
      return result if result
    end
  when /\A\[end\s+(\w+)\]\z/
    plugin_name = $~[1]
    plugin = Renderer.plugin(plugin_name)
    if plugin
      if @state.last == plugin_name
        @state.pop
      else
        @ring_buffer.each do |line|
          puts line
        end
        raise RuntimeError.new("plugin: #{plugin_name} の対応が合っていません")
      end
      result = plugin.process_end
      return result if result
    end
  end

  @state.reverse.each do |plugin_name|
    plugin = Renderer.plugin(plugin_name)
    if plugin
      result = plugin.process_inner(text)
      return result if result
    end
  end

  text = text.strip.gsub(/%([a-z][a-z0-9\-]*){(.*)}/, "<span class='\\1'>\\2</span>")
  "<p>#{text.gsub(/  $/, "<br>\n")}</p>\n"
end