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30a183601e
-- warning: `*' interpreted as argument prefix -- warning: StringScanner#matchedsize is obsolete; use #matched_size instead -- warning: instance variable @else not initialized There's still an issue of warnings output on eval(), but can't work out where that comes from. (eval):25: warning: statement not reached (eval):28: warning: statement not reached Nothing major I know, but it's always a start.
99 lines
2.5 KiB
Ruby
99 lines
2.5 KiB
Ruby
module Sass
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module Tree
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class Node
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attr_accessor :children
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attr_accessor :line
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attr_accessor :filename
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def initialize(options)
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@options = options
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@style = options[:style]
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@children = []
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end
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def <<(child)
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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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@children << child
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end
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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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def ==(other)
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self.class == other.class && other.children == children
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end
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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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if child.is_a? AttrNode
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raise Sass::SyntaxError.new('Attributes aren\'t allowed at the root of a document.', child.line)
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else
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child_str = child.to_s(1)
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next unless child_str && child_str.length > 0
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result << child_str + (@style == :compressed ? '' : "\n")
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end
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end
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@style == :compressed ? result+"\n" : result[0...-1]
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end
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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.new(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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res = ''
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rest = Haml::Shared.handle_interpolation text do |scan|
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escapes = scan[2].size
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res << scan.matched[0...-2 - escapes]
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if escapes % 2 == 1
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res << "\\" * (escapes - 1) << '#{'
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else
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res << "\\" * [0, escapes - 1].max
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res << Script::Parser.new(scan, line, scan.pos - scan.matched_size, filename).
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parse_interpolated.perform(environment).to_s
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end
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end
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res + 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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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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end
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end
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end
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