Class: BlockHTML::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/block-html.rb

Constant Summary collapse

ESC = 
{
  '&' => '&',
  '"' => '"',
  "'" => ''',
  '>' => '>',
  '<' => '&lt;',
  #' ' => '&nbsp;'
}
ESC_STR = 
ESC.inject('') do |ret, (key, val)|
  ret << key
  ret
end

Instance Method Summary collapse

Constructor Details

#initialize(html, indent) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/block-html.rb', line 186

def initialize(html, indent)
  @html   = html 
  @indent = indent.to_i
  @count  = 0
  @text   = 0 < @indent
  @buf    = ''
end

Instance Method Details

#doctype(attrs) ⇒ Object 



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# File 'lib/block-html.rb', line 209

def doctype(attrs)
  case attrs[:format]
  when 'html5'
    @buf << '<!DOCTYPE html>'
  when 'html4'
    case attrs[:type]
    when 'strict'
      @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">'
    when 'frameset'
      @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">'
    else
      @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">'
    end
  when 'xhtml'
    if attrs[:version] == '1.1'
      @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
    else
      case attrs[:type]
      when 'strict'
        @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
      when 'frameset'
        @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">'
      else
        @buf << '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
      end
    end
  end

  @buf << "\n" if 0 < @indent
  @text = true
end

#escape(text) ⇒ Object 



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# File 'lib/block-html.rb', line 194

def escape(text)
  text.to_s.gsub(/[#{ESC_STR}]/) do |val|
    ESC[val]
  end
end

#escaped_text(text) ⇒ Object 



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# File 'lib/block-html.rb', line 281

def escaped_text(text)
  @buf << text
  @text = true
end

#tag(node, tag, attrs) ⇒ Object 



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# File 'lib/block-html.rb', line 241

def tag(node, tag, attrs)
  space = ' ' * @count * @indent

  if node.empty?
    if 0 < @indent && !@text
      @buf << "\n%s<%s%s />" % [space, tag, attrs.to_s]
    else
      @buf << '<%s%s />' % [tag, attrs.to_s]
    end
  else
    if 0 < @indent && !@text
      @buf << "\n"
      @buf << "%s<%s%s>" % [space, tag, attrs.to_s]
    else
      @buf << '<%s%s>' % [tag, attrs.to_s]
    end
    @text = false

    @count += 1
    node.each do |obj|
      obj.render(self)
    end
    @count -= 1

    if 0 < @indent && !@text
      @buf << "\n"
      @buf << "%s</%s>" % [space, tag]
    else
      @buf << '</%s>' % [tag]
    end
  end

  @text = false
end

#text(text) ⇒ Object 



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# File 'lib/block-html.rb', line 276

def text(text)
  @buf << escape(text)
  @text = true
end

#to_s ⇒ Object 



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# File 'lib/block-html.rb', line 286

def to_s
  @buf = ''
  @html.render(self)
  @buf
end

#xml(attrs) ⇒ Object 



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# File 'lib/block-html.rb', line 200

def xml(attrs)
  @buf << '<?xml version="%s" encoding="%s"?>' % [
    attrs[:version],
    attrs[:encoding]
  ]
  @buf << "\n" if 0 < @indent
  @text = true
end