Module: Raw::ScriptFilter

Extended by:
JavascriptHelper
Defined in:
lib/raw/compiler/filter/script.rb

Overview

Generates client-side javascript code. DOES NOT WORK AT THE MOMENT, have to convert this.

Class Method Summary collapse

Class Method Details

.transform(text, compiler) ⇒ Object 



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# File 'lib/raw/compiler/filter/script.rb', line 13

def self.transform(text, compiler)
  begin
    client = constant("#{compiler.controller}::Client")    
  rescue NameError => ex 
    client = nil
  end

  if client
    client.send :include, Nitro::ScriptGenerator
    client = client.new
    
    functions = {}
    params = {}
        
    text.scan(/__nc_(.*)\((.*)\)/) do |match|
      functions[match.first] = true
      params[match.last] = true
    end    
    
    script = ''
    
    for fun in functions.keys
      begin
        client.buffer = ''
        ret = client.send(fun.to_sym)
        
        # the function code is accumulated in the client 
        # buffer.
        
        function_code = client.buffer
        
        # if the client action returns a String append it to
        # the function code.
        
        function_code << ret if ret.is_a?(String)
        
        script << %{
          function __nc_#{fun}(params) {
            #{function_code}
          }
        }
      rescue Object => ex
        Logger.debug ex.inspect if $DBG
      end
    end

  end
  
  # Inject css in the head tag.
  
  if css_buffer = compiler.shared[:css_buffer]
    text.sub!(/<\/head>/) do |match|
      %{
        <style>
          #{css_buffer}
        </style>
      </head>
      }
    end
  end

  # Inject required javascript files in the head tag.

  required_files = Javascript.required_files
  if crf = compiler.shared[:js_required_files]
    required_files.concat(crf.keys)
  end
  
  unless required_files.empty?
    text.sub!(/<\/head>/) do |match|
      %{
        #{include_script *required_files}
      </head>
      }
    end
  end
  
  # Inject javascript just before the end of the
  # template.
  #--
  # gmosx: injection happens at the end, so that the DOM
  # tree is created. Dunno if this is valid xhtml though.
  #++

  js_buffer = compiler.shared[:js_buffer]
  
  if script or js_buffer
    text.sub!(/<\/body>/) do |match|
      %{
        <script type="text/javascript">
          #{script}
          #{js_buffer}
        </script>
      </body>
      }
    end
  end
  
  return text
end