| Class | Sass::Tree::MixinNode |
| In: |
lib/sass/tree/mixin_node.rb
|
| Parent: | Node |
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.
@see Sass::Tree
@param name [String] The name of the mixin @param args [Array<Script::Node>] The arguments to the mixin
# File lib/sass/tree/mixin_node.rb, line 18
18: def initialize(name, args)
19: @name = name
20: @args = args
21: super()
22: end
@see Node#cssize
# File lib/sass/tree/mixin_node.rb, line 25
25: def cssize(extends, parent = nil)
26: _cssize(extends, parent) # Pass on the parent even if it's not a MixinNode
27: end
@see Node#options=
# File lib/sass/tree/mixin_node.rb, line 11
11: def options=(opts)
12: super
13: @args.each {|a| a.context = :equals} if opts[:sass2]
14: end
@see Node#_cssize
# File lib/sass/tree/mixin_node.rb, line 50
50: def _cssize(extends, parent)
51: children.map do |c|
52: parent.check_child! c
53: c.cssize(extends, parent)
54: end.flatten
55: rescue Sass::SyntaxError => e
56: e.modify_backtrace(:mixin => @name, :filename => filename, :line => line)
57: e.add_backtrace(:filename => filename, :line => line)
58: raise e
59: end
Returns an error message if the given child node is invalid, and false otherwise.
{ExtendNode}s are valid within {MixinNode}s.
@param child [Tree::Node] A potential child node @return [Boolean, String] Whether or not the child node is valid,
as well as the error message to display if it is invalid
# File lib/sass/tree/mixin_node.rb, line 39
39: def invalid_child?(child)
40: super unless child.is_a?(ExtendNode)
41: end
Runs the mixin.
@param environment [Sass::Environment] The lexical environment containing
variable and mixin values
@raise [Sass::SyntaxError] if there is no mixin with the given name @raise [Sass::SyntaxError] if an incorrect number of arguments was passed @see Sass::Tree
# File lib/sass/tree/mixin_node.rb, line 68
68: def perform!(environment)
69: original_env = environment
70: original_env.push_frame(:filename => filename, :line => line)
71: original_env.prepare_frame(:mixin => @name)
72: raise Sass::SyntaxError.new("Undefined mixin '#{@name}'.") unless mixin = environment.mixin(@name)
73:
74: raise Sass::SyntaxError.new("Mixin \#{@name} takes \#{mixin.args.size} argument\#{'s' if mixin.args.size != 1}\n but \#{@args.size} \#{@args.size == 1 ? 'was' : 'were'} passed.\n".gsub("\n", "")) if mixin.args.size < @args.size
75: environment = mixin.args.zip(@args).
76: inject(Sass::Environment.new(mixin.environment)) do |env, ((var, default), value)|
77: env.set_local_var(var.name,
78: if value
79: value.perform(environment)
80: elsif default
81: val = default.perform(env)
82: if default.context == :equals && val.is_a?(Sass::Script::String)
83: val = Sass::Script::String.new(val.value)
84: end
85: val
86: end)
87: raise Sass::SyntaxError.new("Mixin #{@name} is missing parameter #{var.inspect}.") unless env.var(var.name)
88: env
89: end
90:
91: self.children = mixin.tree.map {|c| c.perform(environment)}.flatten
92: rescue Sass::SyntaxError => e
93: e.modify_backtrace(:mixin => @name, :line => @line)
94: e.add_backtrace(:line => @line)
95: raise e
96: ensure
97: original_env.pop_frame
98: end
@see Node#to_src
# File lib/sass/tree/mixin_node.rb, line 44
44: def to_src(tabs, opts, fmt)
45: args = '(' + @args.map {|a| a.to_sass(opts)}.join(", ") + ')' unless @args.empty?
46: "#{' ' * tabs}#{fmt == :sass ? '+' : '@include '}#{dasherize(@name, opts)}#{args}#{semi fmt}\n"
47: end