Class: Wunderbar::XmlMarkup

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

Instance Attribute Summary collapse

Class Method 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 128

def initialize(args={})
  @_scope = args.delete(:scope)
  @_indent = args.delete(:indent) || Wunderbar.option[:indent]
  @_width = args.delete(:width) || Wunderbar.option[:width]
  @_pdf = false
  @doc = Node.new(nil)
  @node = @doc
  @indentation_enabled = true
  @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 142

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 139

def _width
  @_width
end

Class Method Details

.dump(content, args = {}) ⇒ Object

convenience method for taking an XML node or string and formatting it



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

def self.dump(content, args={})
  markup = self.new(args)

  if Nokogiri::XML::Document === content and content.root.name == 'html'
    markup.declare! :DOCTYPE, :html
  end

  unless Nokogiri::XML::Node === content
    if defined? Nokogiri::HTML5.fragment
      content = Nokogiri::HTML5.fragment(content.to_s)
    else
      content = Nokogiri::HTML.fragment(content.to_s)
    end
  end

  markup[content]
  markup.target!
end

Instance Method Details

#<<(data) ⇒ Object

insert verbatim



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# File 'lib/wunderbar/builder.rb', line 296

def <<(data)
  if defined? Nokogiri
    if not String === data or data.include? '<' or data.include? '&'
      # https://github.com/google/gumbo-parser/issues/266
      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 329

def [](*children)
  if children.length == 1
    if children.first.respond_to? :root
      children = [children.first.root]
    elsif defined? Nokogiri::XML::DocumentFragment and
      Nokogiri::XML::DocumentFragment === children.first
    then
      children = children.first.children
    end
  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
      # disable indentation on the entire element
      compact! { tag!(child) {self[*child.children]} }
    elsif child.children.empty? and HtmlMarkup::VOID.include? child.name
      tag!(child)
    elsif child.children.all?(&:text?)
      tag!(child, @indentation_enabled ? child.text.strip : child.text)
    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 188

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

#comment!(text) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 172

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

#compact!(&block) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 193

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

#declare!(*args) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 168

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

#indented_text!(text) ⇒ Object 



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# File 'lib/wunderbar/builder.rb', line 176

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 152

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 273

def pdf=(value)
  @_pdf = value
end

#pdf? ⇒ Boolean

Returns:

  • (Boolean) 


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

def pdf?
  @_pdf
end

#render(container, &block) ⇒ Object 



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# File 'lib/wunderbar/react.rb', line 23

def render(container, &block)
  csspath = Wunderbar::Node.parse_css_selector(container)
  root = @node.root

  # find the scripts and target on the page
  scripts = root.search('script')
  target = root.at(container)

  # compute base
  base = root.at('base')
  base = (base ? base.attrs[:href] : nil) || '/'
  base = base[1..-1] if base.start_with? '/'

  # compute client side container
  element = "document.querySelector(#{container.inspect})"
  if csspath.length == 1 and csspath[0].length == 1
    value = csspath[0].values.first
    case csspath[0].keys.first
    when :id
      element = "document.getElementById(#{value.inspect})"
    when :class
      value = value.join(' ')
      element = "document.getElementsByClassName(#{value.inspect})[0]"
    when :name
      element = "document.getElementsByTagName(#{value.inspect})[0]"
    end
  end

  # build client and server scripts
  common = Ruby2JS.convert(block, scope: @_scope, react: true)
  server = "React.renderToString(#{common})"
  client = "React.render(#{common}, #{element})"

  # extract content of scripts
  scripts.map! do |script|
    result = nil
    next if Wunderbar::ClientScriptNode === script

    if script.attrs[:src]
      src = File.join(base, script.attrs[:src])
      name = File.expand_path(src, @_scope.settings.public_folder.untaint)
      if File.exist? name
        result = File.read(name)
      else
        name = File.expand_path(src+'.rb', @_scope.settings.views.untaint)
        if File.exist? name
          result = Ruby2JS.convert(File.read(name), file: name)
        end
      end
    else
      result = Ruby2JS.convert(script.block, binding: script.binding)
    end

    result
  end

  builder = Wunderbar::HtmlMarkup.new({})
  begin
    setup = []
    Wunderbar::Asset.scripts.each do |script|
      next unless script.options[:react]
      setup += script.options[:react] if Array === script.options[:react]

      if script.contents
        scripts.unshift script.contents
      elsif script.path
        scripts.unshift File.read(
          File.expand_path(script.path, Wunderbar::Asset.root))
      end
    end

    # concatenate and execute scripts on server
    scripts.unshift *setup.uniq
    context = ExecJS.compile(scripts.compact.join(";\n"))

    # insert results into target
    nodes = builder._ { context.eval(server) }
    nodes.each {|node| node.parent = target}
    target.children += nodes
  rescue ExecJS::ProgramError => e
    target.children << builder._pre(e.message).node?
  end

  # add client side script
  tag! 'script', Wunderbar::ClientScriptNode, client
end

#respond_to?(method) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wunderbar/builder.rb', line 158

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 202

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 282

def system(command, opts={})
  tag  = opts[:tag]  || 'pre'
  output_class = opts[:class] || {}
  output_class[:stdin]  ||= '_stdin'
  output_class[:stdout] ||= '_stdout'
  output_class[:stderr] ||= '_stderr'
  output_class[:hilite] ||= '_stdout _hilite'

  super do |kind, line|
    tag! tag, line, class: output_class[kind]
  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 207

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

    unless Class === args.first
      args.unshift PreformattedNode if sym == 'pre'
      args.unshift ScriptNode if sym == 'script'
      args.unshift StyleNode if sym == 'style'
    end
  end

  children = nil
  if block and block.arity !=0
    if args.first and args.first.respond_to? :each
      children = args.shift
    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.shift if String === args.first
  @node.add_child node
  @node = node
  if block
    if children
      children.each {|child| block.call(child)}
    else
      block.call(self)
    end
    @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 184

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 164

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