Class: Distil::CssDependencyTask

Inherits:
Task show all
Defined in:
lib/distil/task/css-dependency-task.rb

Instance Attribute Summary

Attributes inherited from Configurable

#options

Instance Method Summary collapse

Methods inherited from Task

#find_files, #handles_file?, inherited, #initialize, #process_files, #project, #target, tasks

Methods inherited from Configurable

#get_option, #get_options, #initialize, option

Constructor Details

This class inherits a constructor from Distil::Task

Instance Method Details

#handles_file(file) ⇒ Object 



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# File 'lib/distil/task/css-dependency-task.rb', line 7

def handles_file(file)
  return ["css"].include?(file.content_type)
end

#include_file(file) ⇒ Object 



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# File 'lib/distil/task/css-dependency-task.rb', line 11

def include_file(file)
  return if !handles_file(file)

  content= target.get_content_for_file(file)

  # Replace all ' (single quotes) with " (double quotes)
  content.gsub!(/\'/,'"')
  # Force a newline after a rule terminating ; (semi-colon)
  content.gsub!(/;(\n|\r)*/, ";\n")

  source_folder= get_option("source_folder")
  
  # Rewrites the 'url("...")' rules to a relative path 
  # based on the location of the new concatenated CSS file.
  line_num=0

  lines= content.split("\n")

  lines.each { |line|

    line_num+=1

    line.gsub!(CSS_IMPORT_REGEX) { |match|
      css_file= File.join(file.parent_folder, $1)

      if (!File.exists?(css_file))
        file.error "Imported CSS file not found: #{$1}", line_num
        # leave the @import rule in place
        match
      else
        file.add_dependency(SourceFile.from_path(css_file))
      end
    }
  
    line.gsub!(/url\("?(.*\.(jpg|png|gif))"?\)/) { |match|
      image_file= File.join(file.parent_folder, $1)

      if (!File.exists?(image_file))
        file.warning "Resource not found: #{$1} (#{image_file})", line_num
        "url(\"#{$1}\")"
      else
        asset= SourceFile.from_path(image_file)
        file.add_asset(asset)
        "url(\"#{asset.relative_to_folder(source_folder)}\")"
      end
    }
  }

  target.set_content_for_file(file, lines.join("\n"))
end