54 lines
1.3 KiB
Ruby
54 lines
1.3 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(style)
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@style = 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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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 SyntaxError.new('Attributes aren\'t allowed at the root of a document.', child.line)
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elsif child.is_a?(RuleNode) && child.continued?
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check_multiline_rule(child)
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result << child.to_s(1)
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else
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result << "#{child.to_s(1)}" + (@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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protected
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def check_multiline_rule(rule)
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unless rule.children.empty?
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raise SyntaxError.new('Rules can\'t end in commas.', rule.line)
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end
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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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