49 lines
1.6 KiB
Ruby
49 lines
1.6 KiB
Ruby
require 'sass/tree/node'
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module Sass::Tree
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# A dynamic node representing a mixin include.
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#
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# @see Sass::Tree
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class MixinNode < Node
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# @param name [String] The name of the mixin
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# @param args [Array<Script::Node>] The arguments to the mixin
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def initialize(name, args)
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@name = name
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@args = args
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super()
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end
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protected
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# Runs the mixin.
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#
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# @param environment [Sass::Environment] The lexical environment containing
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# variable and mixin values
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# @return [Array<Tree::Node>] The resulting static nodes
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# @raise [Sass::SyntaxError] if there is no mixin with the given name
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# @raise [Sass::SyntaxError] if an incorrect number of arguments was passed
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# @see Sass::Tree
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def _perform(environment)
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raise Sass::SyntaxError.new("Undefined mixin '#{@name}'.", @line) unless mixin = environment.mixin(@name)
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raise Sass::SyntaxError.new(<<END.gsub("\n", "")) if mixin.args.size < @args.size
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Mixin #{@name} takes #{mixin.args.size} argument#{'s' if mixin.args.size != 1}
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but #{@args.size} #{@args.size == 1 ? 'was' : 'were'} passed.
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END
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environment = mixin.args.zip(@args).
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inject(Sass::Environment.new(mixin.environment)) do |env, ((name, default), value)|
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env.set_local_var(name,
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if value
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value.perform(environment)
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elsif default
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default.perform(env)
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end)
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raise Sass::SyntaxError.new("Mixin #{@name} is missing parameter !#{name}.") unless env.var(name)
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env
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end
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mixin.tree.map {|c| c.perform(environment)}.flatten
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end
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end
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end
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