Class: Wunderbar::XmlMarkup

Inherits:
Object
  • Object
show all
Defined in:
lib/wunderbar/builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ XmlMarkup

Returns a new instance of XmlMarkup.



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# File 'lib/wunderbar/builder.rb', line 82

def initialize(args)
  @_scope = args.delete(:scope)
  @_builder = SpacedMarkup.new(args)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

forward to Wunderbar, XmlMarkup, or @_scope



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# File 'lib/wunderbar/builder.rb', line 88

def method_missing(method, *args, &block)
  if Wunderbar.respond_to? method
    Wunderbar.send method, *args, &block
  elsif SpacedMarkup.public_instance_methods.include? method
    @_builder.__send__ method, *args, &block
  elsif SpacedMarkup.public_instance_methods.include? method.to_s
    @_builder.__send__ method, *args, &block
  elsif @_scope and @_scope.respond_to? method
    @_scope.send method, *args, &block
  else
    super
  end
end

Instance Method Details

#<<(data) ⇒ Object

insert verbatim



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# File 'lib/wunderbar/builder.rb', line 195

def <<(data)
  if not String === data or data.include? '<' or data.include? '&'
    require 'nokogiri'
    data = Nokogiri::HTML::fragment(data.to_s).to_xml
  end

  # fix CDATA in most cases (notably scripts)
  data.gsub!(/<!\[CDATA\[(.*?)\]\]>/m) do |cdata|
    if $1.include? '<' or $1.include? '&'
      "//<![CDATA[\n#{$1}\n//]]>"
    else
      $1
    end
  end

  # fix CDATA for style elements
  data.gsub!(/<style([^>])*>\/\/<!\[CDATA\[\n(.*?)\s+\/\/\]\]>/m) do |cdata|
    if $2.include? '<' or $2.include? '&'
      "<style#{$1}>/*<![CDATA[*/\n#{$2.gsub("\n\Z",'')}\n/*]]>*/"
    else
      $1
    end
  end

  @_builder << data
rescue LoadError
  @_builder << data
end

#comment(*args) ⇒ Object

comment



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# File 'lib/wunderbar/builder.rb', line 190

def comment(*args)
  @_builder.comment! *args
end

#declare(*args) ⇒ Object

declaration (DOCTYPE, etc)



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# File 'lib/wunderbar/builder.rb', line 185

def declare(*args)
  @_builder.declare!(*args)
end

#methods ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 102

def methods
  result = super + Wunderbar.methods
  result += SpacedMarkup.public_instance_methods
  result += @_scope.methods if @_scope
  result.uniq
end

#respond_to?(method) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wunderbar/builder.rb', line 109

def respond_to?(method)
  respond true if Wunderbar.respond_to? method
  respond true if SpacedMarkup.public_instance_methods.include? method
  respond true if SpacedMarkup.public_instance_methods.include?  method.to_s
  respond true if @_scope and @_scope.respond_to? method?
  super
end

#system(command, opts = {}) ⇒ Object

execute a system command, echoing stdin, stdout, and stderr



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# File 'lib/wunderbar/builder.rb', line 127

def system(command, opts={})
  if command.respond_to? :join
    begin
      # if available, use escape as it does prettier quoting
      require 'escape'
      command = Escape.shell_command(command).untaint
    rescue LoadError
      # std-lib function that gets the job done
      require 'shellwords'
      command = Shellwords.join(command).untaint
    end
  end

  require 'open3'
  tag  = opts[:tag]  || 'pre'
  output_class = opts[:class] || {}
  stdin  = output_class[:stdin]  || '_stdin'
  stdout = output_class[:stdout] || '_stdout'
  stderr = output_class[:stderr] || '_stderr'

  @_builder.tag! tag, command, :class=>stdin unless opts[:echo] == false

  require 'thread'
  semaphore = Mutex.new
  Open3.popen3(command) do |pin, pout, perr|
    [
      Thread.new do
        until pout.eof?
          out_line = pout.readline.chomp
          semaphore.synchronize do
            @_builder.tag! tag, out_line, :class=>stdout
          end
        end
      end,

      Thread.new do
        until perr.eof?
          err_line = perr.readline.chomp
          semaphore.synchronize do 
            @_builder.tag! tag, err_line, :class=>stderr
          end
        end
      end,

      Thread.new do
        if opts[:stdin].respond_to? :read
          require 'fileutils'
          FileUtils.copy_stream opts[:stdin], pin
        elsif opts[:stdin]
          pin.write opts[:stdin].to_s
        end
        pin.close
      end
    ].each {|thread| thread.join}
  end
end

#tag!(sym, *args, &block) ⇒ Object

avoid method_missing overhead for the most common case



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# File 'lib/wunderbar/builder.rb', line 118

def tag!(sym, *args, &block)
  if !block and (args.empty? or args == [''])
    CssProxy.new(@_builder, @_builder.target!, sym, args)
  else
    @_builder.tag! sym, *args, &block
  end
end