A visitor for checking that all nodes are properly nested.
# File lib/sass/tree/visitors/check_nesting.rb, line 5 def initialize @parents = [] end
# File lib/sass/tree/visitors/check_nesting.rb, line 48 def invalid_charset_parent?(parent, child) "@charset may only be used at the root of a document." unless parent.is_a?(Sass::Tree::RootNode) end
# File lib/sass/tree/visitors/check_nesting.rb, line 53 def invalid_extend_parent?(parent, child) unless is_any_of?(parent, VALID_EXTEND_PARENTS) return "Extend directives may only be used within rules." end end
# File lib/sass/tree/visitors/check_nesting.rb, line 67 def invalid_function_child?(parent, child) unless is_any_of?(child, VALID_FUNCTION_CHILDREN) "Functions can only contain variable declarations and control directives." end end
# File lib/sass/tree/visitors/check_nesting.rb, line 59 def invalid_function_parent?(parent, child) "Functions may only be defined at the root of a document." unless parent.is_a?(Sass::Tree::RootNode) end
# File lib/sass/tree/visitors/check_nesting.rb, line 74 def invalid_import_parent?(parent, child) unless (@parents.map {|p| p.class} & INVALID_IMPORT_PARENTS).empty? return "Import directives may not be used within control directives or mixins." end return if parent.is_a?(Sass::Tree::RootNode) return "CSS import directives may only be used at the root of a document." if child.css_import? # If this is a nested @import, we need to make sure it doesn't have anything # that's legal at top-level but not in the current context (e.g. mixin defs). child.imported_file.to_tree.children.each {|c| visit(c)} nil rescue Sass::SyntaxError => e e.modify_backtrace(:filename => child.imported_file.options[:filename]) e.add_backtrace(:filename => child.filename, :line => child.line) raise e end
# File lib/sass/tree/visitors/check_nesting.rb, line 90 def invalid_mixindef_parent?(parent, child) "Mixins may only be defined at the root of a document." unless parent.is_a?(Sass::Tree::RootNode) end
# File lib/sass/tree/visitors/check_nesting.rb, line 95 def invalid_prop_child?(parent, child) unless is_any_of?(child, VALID_PROP_CHILDREN) "Illegal nesting: Only properties may be nested beneath properties." end end
# File lib/sass/tree/visitors/check_nesting.rb, line 103 def invalid_prop_parent?(parent, child) unless is_any_of?(parent, VALID_PROP_PARENTS) "Properties are only allowed within rules, directives, or other properties." + child.pseudo_class_selector_message end end
# File lib/sass/tree/visitors/check_nesting.rb, line 109 def invalid_return_parent?(parent, child) "@return may only be used within a function." unless parent.is_a?(Sass::Tree::FunctionNode) end
# File lib/sass/tree/visitors/check_nesting.rb, line 9 def visit(node) if error = @parent && ( try_send("invalid_#{node_name @parent}_child?", @parent, node) || try_send("invalid_#{node_name node}_parent?", @parent, node)) raise Sass::SyntaxError.new(error) end super rescue Sass::SyntaxError => e e.modify_backtrace(:filename => node.filename, :line => node.line) raise e end
# File lib/sass/tree/visitors/check_nesting.rb, line 23 def visit_children(parent) old_parent = @parent @parent = parent unless is_any_of?(parent, SCRIPT_NODES) @parents.push parent super ensure @parent = old_parent @parents.pop end
# File lib/sass/tree/visitors/check_nesting.rb, line 40 def visit_import(node) yield rescue Sass::SyntaxError => e e.modify_backtrace(:filename => node.children.first.filename) e.add_backtrace(:filename => node.filename, :line => node.line) raise e end
# File lib/sass/tree/visitors/check_nesting.rb, line 33 def visit_root(node) yield rescue Sass::SyntaxError => e e.sass_template ||= node.template raise e end