Class: Sass::Tree::MixinNode
Overview
A static node representing a mixin include. When in a static tree, the sole purpose is to wrap exceptions to add the mixin to the backtrace.
Instance Attribute Summary
Attributes inherited from Node
#children, #filename, #line, #options
Instance Method Summary collapse
- #_cssize(parent) protected
- #cssize(parent = nil)
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#initialize(name, args) ⇒ MixinNode
constructor
A new instance of MixinNode.
-
#perform!(environment)
protected
Runs the mixin.
Methods inherited from Node
#<<, #==, #_perform, #_to_s, #balance, #cssize!, #interpolate, #invalid_child?, #invisible?, #last, #perform, #perform_children, #render, #style, #to_s, #to_sass
Constructor Details
#initialize(name, args) ⇒ MixinNode
Returns a new instance of MixinNode.
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# File 'lib/sass/tree/mixin_node.rb', line 12
def initialize(name, args)
@name = name
@args = args
super()
end
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Instance Method Details
#_cssize(parent) (protected)
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# File 'lib/sass/tree/mixin_node.rb', line 26
def _cssize(parent)
children.map {|c| c.cssize(parent)}.flatten
rescue Sass::SyntaxError => e
e.modify_backtrace(:mixin => @name, :line => line)
e.add_backtrace(:filename => filename, :line => line)
raise e
end
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#cssize(parent = nil)
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# File 'lib/sass/tree/mixin_node.rb', line 19
def cssize(parent = nil)
_cssize(parent) # Pass on the parent even if it's not a MixinNode
end
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#perform!(environment) (protected)
Runs the mixin.
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# File 'lib/sass/tree/mixin_node.rb', line 41
def perform!(environment)
raise Sass::SyntaxError.new("Undefined mixin '#{@name}'.") unless mixin = environment.mixin(@name)
raise Sass::SyntaxError.new(<<END.gsub("\n", "")) if mixin.args.size < @args.size
Mixin #{@name} takes #{mixin.args.size} argument#{'s' if mixin.args.size != 1}
but #{@args.size} #{@args.size == 1 ? 'was' : 'were'} passed.
END
environment = mixin.args.zip(@args).
inject(Sass::Environment.new(mixin.environment)) do |env, ((var, default), value)|
env.set_local_var(var.name,
if value
value.perform(environment)
elsif default
default.perform(env)
end)
raise Sass::SyntaxError.new("Mixin #{@name} is missing parameter #{var.inspect}.") unless env.var(var.name)
env
end
self.children = mixin.tree.map {|c| c.perform(environment)}.flatten
rescue Sass::SyntaxError => e
e.modify_backtrace(:mixin => @name, :line => @line)
e.add_backtrace(:line => @line)
raise e
end
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