Class: Sass::Engine

Inherits:
Object show all
Includes:
Haml::Util
Defined in:
lib/sass/engine.rb

Overview

This class handles the parsing and compilation of the Sass template. Example usage:

template = File.load('stylesheets/sassy.sass')
sass_engine = Sass::Engine.new(template)
output = sass_engine.render
puts output

Defined Under Namespace

Classes: Line

Constant Summary collapse

PROPERTY_CHAR =

The character that begins a CSS property.

?:
SCRIPT_CHAR =

The character that designates that a property should be assigned to a SassScript expression.

?=
COMMENT_CHAR =

The character that designates the beginning of a comment, either Sass or CSS.

?/
SASS_COMMENT_CHAR =

The character that follows the general COMMENT_CHAR and designates a Sass comment, which is not output as a CSS comment.

?/
CSS_COMMENT_CHAR =

The character that follows the general COMMENT_CHAR and designates a CSS comment, which is embedded in the CSS document.

?*
DIRECTIVE_CHAR =

The character used to denote a compiler directive.

?@
ESCAPE_CHAR =

Designates a non-parsed rule.

?\\
MIXIN_DEFINITION_CHAR =

Designates block as mixin definition rather than CSS rules to output

?=
MIXIN_INCLUDE_CHAR =

Includes named mixin declared using MIXIN_DEFINITION_CHAR

?+
PROPERTY_NEW_MATCHER =

The regex that matches properties of the form name: prop.

/^[^\s:"\[]+\s*[=:](\s|$)/
PROPERTY_NEW =

The regex that matches and extracts data from properties of the form name: prop.

/^([^\s=:"]+)(\s*=|:)(?:\s+|$)(.*)/
PROPERTY_OLD =

The regex that matches and extracts data from properties of the form :name prop.

/^:([^\s=:"]+)\s*(=?)(?:\s+|$)(.*)/
DEFAULT_OPTIONS =

The default options for Sass::Engine.

{
  :style => :nested,
  :load_paths => ['.'],
  :cache => true,
  :cache_location => './.sass-cache',
}.freeze

Constants included from Haml::Util

Haml::Util::RUBY_VERSION

Instance Method Summary collapse

Methods included from Haml::Util

#assert_html_safe!, #caller_info, #check_encoding, #def_static_method, #enum_with_index, #has?, #map_hash, #map_keys, #map_vals, #merge_adjacent_strings, #powerset, #rails_xss_safe?, #ruby1_8?, #scope, #static_method_name, #to_hash

Constructor Details

#initialize(template, options = {}) ⇒ Engine

Returns a new instance of Engine.

Parameters:



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# File 'lib/sass/engine.rb', line 132

def initialize(template, options={})
  @options = DEFAULT_OPTIONS.merge(options)
  @template = template

  # Backwards compatibility
  @options[:property_syntax] ||= @options[:attribute_syntax]
  case @options[:property_syntax]
  when :alternate; @options[:property_syntax] = :new
  when :normal; @options[:property_syntax] = :old
  end
end

Instance Method Details

#render ⇒ String Also known as: to_css

Render the template to CSS.

Returns:

  • (String) —

    The CSS

Raises:



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# File 'lib/sass/engine.rb', line 148

def render
  to_tree.render
end

#to_tree ⇒ Sass::Tree::Node

Parses the document into its parse tree.

Returns:

Raises:



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# File 'lib/sass/engine.rb', line 158

def to_tree
  check_encoding(@template) {|msg, line| raise Sass::SyntaxError.new(msg, :line => line)}

  root = Tree::RootNode.new(@template)
  append_children(root, tree(tabulate(@template)).first, true)
  root.options = @options
  root
rescue SyntaxError => e
  e.modify_backtrace(:filename => @options[:filename], :line => @line)
  e.sass_template = @template
  raise e
end