92 lines
1.9 KiB
Ruby
92 lines
1.9 KiB
Ruby
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require File.dirname(__FILE__) + '/../sass'
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require 'sass/tree/node'
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require 'strscan'
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module Sass
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# :stopdoc:
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module Tree
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class Node
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def to_sass
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result = ''
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children.each do |child|
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result << "#{child.to_sass(0)}\n"
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end
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result
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end
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end
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class RuleNode
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def to_sass(tabs)
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str = "#{' ' * tabs}#{rule}\n"
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children.each do |child|
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str << "#{child.to_sass(tabs + 1)}\n"
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end
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str
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end
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end
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class AttrNode
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def to_sass(tabs)
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"#{' ' * tabs}:#{name} #{value}"
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end
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end
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end
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# :startdoc:
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# This class contains the functionality used in the +css2sass+ utility,
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# namely converting CSS documents to Sass templates.
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class CSS
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# :stopdoc:
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# The Regexp matching a CSS rule
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RULE_RE = /\s*([^\{]+)\s*\{/
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# The Regexp matching a CSS attribute
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ATTR_RE = /\s*[^::\{\}]+\s*:\s*[^:;\{\}]+\s*;/
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# :startdoc:
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# Creates a new instance of Sass::CSS that will compile the given document
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# to a Sass string when +render+ is called.
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def initialize(template)
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if template.is_a? IO
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template = template.read
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end
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@template = StringScanner.new(template)
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end
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# Processes the document and returns the result as a string
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# containing the CSS template.
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def render
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build_tree.to_sass
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end
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private
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def build_tree
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root = Tree::Node.new(nil)
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while @template.scan(RULE_RE)
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rule = Tree::RuleNode.new(@template[0][0...-1].strip, nil)
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root << rule
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while @template.scan(ATTR_RE)
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attrs = @template[0][0...-1].split(':').map {|s| s.strip}
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rule << Tree::AttrNode.new(attrs[0], attrs[1], nil)
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end
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if @template.scan(/\s*\}/).nil?
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raise "Invalid CSS!"
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end
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end
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root
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end
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end
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end
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