Adding in the initial sasstastic stuff.

git-svn-id: svn://hamptoncatlin.com/haml/branches/1.5dev@174 7063305b-7217-0410-af8c-cdc13e5119b9

lib/sass/css/attribute.rb

@@ -0,0 +1,6 @@
+module Sass
+  module Css
+    class Attribute
+    end
+  end
+end

lib/sass/css/node.rb

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+require File.dirname(__FILE__) + '/attribute'
+
+module Sass
+  module Css
+    class Node
+      attr_reader :children, :attributes, :parent, :name
+      attr_writer :children, :attributes, :parent, :name
+
+      def initialize(name)
+        @name = name
+        @children, @attributes = [], []
+      end
+
+      def <<(child)
+        @children << child
+        child.parent = self
+        true
+      end
+
+      def to_s
+        name + "\n" + (self.children.collect { |c| c.to_s }).join("\n>>")
+      end
+    end
+  end
+end

lib/sass/css/parser.rb

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+
+
+require File.dirname(__FILE__) + '/node'
+
+module Sass
+  module Css
+    def self.parse(sass_file)
+      build_tree(sass_file)
+    end
+
+    def self.build_tree(sass_tree)
+      last_level, last_node = 0, nil
+      base_container = []
+      sass_tree.each do |line|
+        line, level = whitespace_strip_and_count(line)
+        #puts "#{level}:#{last_level} #{line}"
+        if level == 0
+          base_container << (last_node = Node.new(line))
+        else
+          if line[0] == ':'[0]
+            if last_level == level
+              (1 + last_level - level).times { last_node = last_node.parent }
+              last_level = level
+            end
+            last_node.attributes << line
+          else
+            node = Node.new(line)
+            if last_level <= level
+              (1 + last_level - level).times { last_node = last_node.parent }
+            end
+            last_node << node
+            last_level, last_node = level, node
+          end
+        end
+      end
+      return base_container
+    end
+
+    def self.whitespace_strip_and_count(line)
+      [line.strip, line.scan(/[ ]*/)[0].length / 2]
+    end
+  end
+end

lib/sass/engine.rb

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+
+require File.dirname(__FILE__) + '/css/parser'
+
+module Sass
+  class Engine
+    def render(input)
+      buffer, stack, last_level, first = "", [], 0, true
+      input.each do |line|
+        line, level = [line.strip, line.scan(/[ ]*/)[0].length / 2]
+        unless line.empty?
+          if '%.#'.index line[0..0]
+            if !first
+              buffer << "}\n"
+            end
+            if level <= last_level
+              stack.delete_at(stack.size - 1)
+              if stack.empty?
+                buffer << "\n"
+              end
+            end
+            stack << line
+            buffer << stack.join(" ") + " { "
+            last_level, first = level, false
+          elsif ':' == line[0..0]
+            attribute, *value = line.scan(/[^ ]*/)
+            value = value.join(" ") if value.is_a? Array
+            buffer << "#{attribute[1..-1]}: #{value.strip}; "
+          end
+
+        end
+      end
+
+      unless stack.empty?
+        buffer << "}"
+      end
+
+      buffer
+    end
+  end
+end

lib/sass/plugin.rb

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+
+#Rails plugin stuff. For use with action_view
+
+module Sass
+  module Plugin
+
+    def options
+      @@options
+    end
+
+    def stylesheet_location
+      @@options[:stylesheet_location] || (RAILS_ROOT + "/public/stylesheets/")
+    end
+
+    def sass_template(name)
+      file_location = stylesheet_location + name
+      if stylesheet_needs_update?(file_location)
+        file = File.open(file_location + ".css")
+        Sass::Engine.new.render(file_location + ".sass")
+      end
+    end
+
+    def stylesheet_needs_update?(file_location)
+      !File.exists?(file_location + ".css") || (File.mtime("#{file_location}.sass") - 60) > File.mtime("#{file_location}.css")
+    end
+  end
+end