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https://github.com/haml/haml.git
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616a00cea6
Unify and clarify the way Sass errors are handled (see notes in Sass::Error). This fixes some bugs with filenames and/or line numbers being mis-recorded for imports.
105 lines
3.7 KiB
Ruby
105 lines
3.7 KiB
Ruby
module Sass::Tree
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# A static node reprenting a CSS property.
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#
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# @see Sass::Tree
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class PropNode < Node
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# The name of the property.
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#
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# @return [String]
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attr_accessor :name
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# The value of the property,
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# either a plain string or a SassScript parse tree.
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#
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# @return [String, Script::Node]
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attr_accessor :value
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# @param name [String] See \{#name}
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# @param value [String] See \{#value}
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# @param prop_syntax [Symbol] `:new` if this property uses `a: b`-style syntax,
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# `:old` if it uses `:a b`-style syntax
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def initialize(name, value, prop_syntax)
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@name = name
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@value = value
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@prop_syntax = prop_syntax
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super()
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end
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# Compares the names and values of two properties.
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#
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# @param other [Object] The object to compare with
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# @return [Boolean] Whether or not this node and the other object
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# are the same
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def ==(other)
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self.class == other.class && name == other.name && value == other.value && super
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end
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# Computes the CSS for the property.
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#
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# @param tabs [Fixnum] The level of indentation for the CSS
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# @param parent_name [String] The name of the parent property (e.g. `text`) or nil
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# @return [String] The resulting CSS
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# @raise [Sass::SyntaxError] if the property uses invalid syntax
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def to_s(tabs, parent_name = nil)
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raise Sass::SyntaxError.new("Illegal property syntax: can't use new syntax when :property_syntax => :old is set.",
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:line => @line) if @options[:property_syntax] == :old && @prop_syntax == :new
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raise Sass::SyntaxError.new("Illegal property syntax: can't use old syntax when :property_syntax => :new is set.",
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:line => @line) if @options[:property_syntax] == :new && @prop_syntax == :old
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raise Sass::SyntaxError.new("Invalid property: #{declaration.dump} (no \";\" required at end-of-line).",
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:line => @line) if value[-1] == ?;
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raise Sass::SyntaxError.new("Invalid property: #{declaration.dump} (no value).",
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:line => @line) if value.empty? && children.empty?
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real_name = name
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real_name = "#{parent_name}-#{real_name}" if parent_name
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join_string = case style
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when :compact; ' '
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when :compressed; ''
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else "\n"
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end
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spaces = ' ' * (tabs - 1)
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to_return = ''
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if !value.empty?
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to_return << "#{spaces}#{real_name}:#{style == :compressed ? '' : ' '}#{value};#{join_string}"
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end
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children.each do |kid|
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next if kid.invisible?
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to_return << kid.to_s(tabs, real_name) << join_string
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end
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(style == :compressed && parent_name) ? to_return : to_return[0...-1]
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end
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protected
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# Runs any SassScript that may be embedded in the property.
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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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def perform!(environment)
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@name = interpolate(@name, environment)
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@value = @value.is_a?(String) ? interpolate(@value, environment) : @value.perform(environment).to_s
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super
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end
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# Returns an error message if the given child node is invalid,
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# and false otherwise.
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#
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# {PropNode} only allows other {PropNode}s and {CommentNode}s as children.
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# @param child [Tree::Node] A potential child node
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# @return [String] An error message if the child is invalid, or nil otherwise
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def invalid_child?(child)
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if !child.is_a?(PropNode) && !child.is_a?(CommentNode)
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"Illegal nesting: Only properties may be nested beneath properties."
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end
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end
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private
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def declaration
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@prop_syntax == :new ? "#{name}: #{value}" : ":#{name} #{value}"
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end
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end
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end
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