2006-12-04 08:40:23 +00:00
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module Sass
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module Tree
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class Node
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2007-01-28 10:14:15 +00:00
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attr_accessor :children
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attr_accessor :line
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2007-03-25 04:57:03 +00:00
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attr_accessor :filename
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2006-12-04 08:40:23 +00:00
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2008-07-20 03:27:17 +00:00
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def initialize(options)
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@options = options
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@style = options[:style]
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2006-12-04 08:40:23 +00:00
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@children = []
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end
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def <<(child)
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2007-03-18 04:15:50 +00:00
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if msg = invalid_child?(child)
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raise Sass::SyntaxError.new(msg, child.line)
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end
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2006-12-04 08:40:23 +00:00
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@children << child
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end
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2008-04-08 06:09:17 +00:00
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2008-10-15 06:10:41 +00:00
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# We need this because Node duck types as an Array in engine.rb
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def last
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children.last
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end
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2006-12-04 08:40:23 +00:00
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def to_s
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result = String.new
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children.each do |child|
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2007-01-28 10:14:15 +00:00
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if child.is_a? AttrNode
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2008-10-13 16:49:35 +00:00
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raise Sass::SyntaxError.new('Attributes aren\'t allowed at the root of a document.', child.line)
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2007-08-10 05:21:56 +00:00
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else
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2007-09-07 09:00:58 +00:00
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result << "#{child.to_s(1)}" + (@style == :compressed ? '' : "\n")
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2007-03-25 04:57:03 +00:00
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end
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2006-12-04 08:40:23 +00:00
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end
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2007-09-07 09:00:58 +00:00
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@style == :compressed ? result+"\n" : result[0...-1]
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2006-12-04 08:40:23 +00:00
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end
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2007-03-18 04:15:50 +00:00
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2008-10-13 16:49:35 +00:00
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def perform(environment)
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_perform(environment)
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rescue Sass::SyntaxError => e
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e.sass_line ||= line
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raise e
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end
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protected
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def _perform(environment)
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node = dup
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node.perform!(environment)
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node
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end
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def perform!(environment)
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self.children = perform_children(environment)
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end
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def perform_children(environment)
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children.map {|c| c.perform(environment)}.flatten
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end
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def interpolate(text, environment)
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scan = StringScanner.new(text)
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str = ''
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while scan.scan(/(.*?)(\\*)\#\{/)
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escapes = scan[2].size
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str << scan.matched[0...-2 - escapes]
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if escapes % 2 == 1
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str << '#{'
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else
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str << Sass::Script.resolve(balance(scan, ?{, ?}, 1)[0][0...-1], line, environment)
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end
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end
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str + scan.rest
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end
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def balance(*args)
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res = Haml::Shared.balance(*args)
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return res if res
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raise Sass::SyntaxError.new("Unbalanced brackets.", line)
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end
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2007-03-18 04:15:50 +00:00
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private
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# This method should be overridden by subclasses to return an error message
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# if the given child node is invalid,
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# and false or nil otherwise.
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def invalid_child?(child)
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false
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end
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2006-12-04 08:40:23 +00:00
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end
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end
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end
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