Class: Wunderbar::XmlMarkup

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BuilderClass

#websocket

Methods inherited from BuilderBase

#get_binding, #set_variables_from_params

Constructor Details

#initialize(args) ⇒ XmlMarkup

Returns a new instance of XmlMarkup.



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# File 'lib/wunderbar/builder.rb', line 33

def initialize(args)
  @_scope = args.delete(:scope)
  @_indent = args.delete(:indent) or 2
  @_pdf = false
  @doc = Node.new(nil)
  @node = @doc
  @indentation_enabled = true
  @width = nil
  @spaced = false
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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

forward to Wunderbar or @_scope



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# File 'lib/wunderbar/builder.rb', line 47

def method_missing(method, *args, &block)
  if Wunderbar.respond_to? method
    Wunderbar.send method, *args, &block
  elsif @_scope and @_scope.respond_to? method
    @_scope.send method, *args, &block
  else
    super
  end
end

Instance Attribute Details

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/wunderbar/builder.rb', line 44

def width
  @width
end

Instance Method Details

#<<(data) ⇒ Object

insert verbatim



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# File 'lib/wunderbar/builder.rb', line 245

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

      # fix CDATA in most cases (notably scripts)
      data.gsub!(/<!\[CDATA\[(.*?)\]\]>/m) do
        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
        if $2.include? '<' or $2.include? '&'
          "<style#{$1}>/*<![CDATA[*/\n#{$2.gsub("\n\Z",'')}\n/*]]>*/"
        else
          $1
        end
      end
    end
  end

  if String === data
    @node.children << data
  else
    @node.add_child data
  end
end

#[](*children) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 277

def [](*children)
  if children.length == 1 and children.first.respond_to? :root
    children = [children.first.root]
  end

  # remove leading and trailing space
  if children.first.text? and children.first.text.strip.empty?
    children.shift
  end

  if not children.empty?
    children.pop if children.last.text? and children.last.text.strip.empty?
  end

  children.map do |child|
    if child.text? or child.cdata?
      text = child.text
      if not @indentation_enabled
        text! text
      elsif text.strip.empty?
        text! "" if text.count("\n")>1
      else
        indented_text! text
      end
    elsif child.comment?
      comment! child.text.sub(/\A /,'').sub(/ \Z/, '')
    elsif HtmlMarkup.flatten? child.children
      block_element = Proc.new do |node| 
        node.element? and HtmlMarkup::HTML5_BLOCK.include?(node.name)
      end

      if child.children.any?(&block_element)
        # indent children, but disable indentation on consecutive
        # sequences of non-block-elements.  Put another way: break
        # out block elements to a new line.
        tag!(child) do
          children = child.children.to_a
          while not children.empty?
            stop = children.index(&block_element)
            if stop == 0
              self[children.shift]
            else
              compact!(nil) do
                self[*children.shift(stop || children.length)]
              end
            end
          end
        end
      else
        # disable indentation on the entire element
        compact! do
          tag!(child) {self[*child.children]}
        end
      end
    elsif child.children.empty? and HtmlMarkup::VOID.include? child.name
      tag!(child)
    elsif child.children.all?(&:text?)
      tag!(child, child.text.strip)
    elsif child.children.any?(&:cdata?) and child.text =~ /[<&]/
      self << child
    elsif child.name == 'pre'
      compact! { tag!(child) {self[*child.children]} }
    elsif child.name == 'head'
      head = tag!(child) {self[*child.children]}
      html = @doc.children.last
      if html.name == :html
        head.parent.children.pop
        html.children.unshift head
        head.parent = html
      end
      head
    else
      tag!(child) {self[*child.children]}
    end
  end
end

#clear! ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 93

def clear!
  @doc.children.clear
  @node = @doc
end

#comment!(text) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 77

def comment! text
  @node.children << CommentNode.new(text)
end

#compact!(&block) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 98

def compact!(&block)
  begin
    @indentation_enabled = false
    block.call
  ensure
    @indentation_enabled = true
  end
end

#declare!(*args) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 73

def declare! *args
  @node.children << DocTypeNode.new(*args)
end

#indented_text!(text) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 81

def indented_text!(text)
  return if text.length == 0 and not @spaced
  text = IndentedTextNode.new(text)
  text.extend SpacedNode if @spaced
  @node.children << text
  @spaced = false
end

#methods ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 57

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

#pdf=(value) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 160

def pdf=(value)
  @_pdf = value
end

#pdf? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wunderbar/builder.rb', line 164

def pdf?
  @_pdf
end

#respond_to?(method) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wunderbar/builder.rb', line 63

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

#spaced! ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 107

def spaced!
  @spaced = true
end

#system(command, opts = {}) ⇒ Object

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



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# File 'lib/wunderbar/builder.rb', line 169

def system(command, opts={})
  if command.respond_to? :flatten
    flat = command.flatten
    secret = command - flat
    begin
      # if available, use escape as it does prettier quoting
      require 'escape'
      echo = Escape.shell_command(command.compact - secret)
    rescue LoadError
      # std-lib function that gets the job done
      require 'shellwords'
      echo = Shellwords.join(command.compact - secret)
    end
    command = flat.compact.map(&:dup).map(&:untaint)
  else
    echo = command
    command = [command]
  end
  
  patterns = opts[:hilite] || []
  patterns=[patterns] if String === patterns or Regexp === patterns
  patterns.map! do |pattern| 
    String === pattern ? Regexp.new(Regexp.escape(pattern)) : pattern
  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'
  hilite = output_class[:hilite] || '_stdout _hilite'

  tag! tag, echo, :class=>stdin unless opts[:echo] == false

  require 'thread'
  semaphore = Mutex.new
  Open3.popen3(*command) do |pin, pout, perr, wait|
    [
      Thread.new do
        until pout.eof?
          out_line = pout.readline.chomp
          semaphore.synchronize do
            if patterns.any? {|pattern| out_line =~ pattern}
              tag! tag, out_line, :class=>hilite
            else
              tag! tag, out_line, :class=>stdout
            end
          end
        end
      end,

      Thread.new do
        until perr.eof?
          err_line = perr.readline.chomp
          semaphore.synchronize do 
            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}
    wait and wait.value.exitstatus
  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 112

def tag!(sym, *args, &block)
  current_node = @node

  if sym.respond_to? :children
    node = sym
    attributes = node.attributes
    if node.attribute_nodes.any?(&:namespace)
      attributes = Hash[node.attribute_nodes.map { |attr| 
        name = attr.name
        name = "#{attr.namespace.prefix}:#{name}" if attr.namespace
        [name, attr.value]
      }]
    end
    attributes.merge!(node.namespaces) if node.namespaces
    args.push attributes
    if node.namespace and node.namespace.prefix
      sym = "#{node.namespace.prefix}:#{node.name}"
    else
      sym = node.name
    end
  end

  if Class === args.first and args.first < Node
    node = args.shift.new sym, *args
  else
    node = Node.new sym, *args
  end

  node.extend CompactNode unless @indentation_enabled

  if @spaced
    node.extend SpacedNode
    @spaced = false
  end

  node.text = args.first if String === args.first
  @node.add_child node
  @node = node
  if block
    block.call(self)
    @node.children << nil if @node.children.empty?
  end

  node
ensure
  @node = current_node
end

#target! ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 89

def target!
  "#{@doc.serialize(indent: ' ' * @_indent, width: @width).join("\n")}\n"
end

#text!(text) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 69

def text! text
  @node.children << TextNode.new(text)
end