cefdb77f9b
Style no forced docs for the properties code and similar, but I ran out of time, and I think it's a nice improvement. I'd appreciate a fast-ish turn-around time because this is pretty much prone to bitrot. Source-Repo: https://github.com/servo/servo Source-Revision: bd67163438317daa711b2411ce302aaf5bf4136a
59 lines
2.0 KiB
Rust
59 lines
2.0 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Implements sequential traversal over the DOM tree.
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#![deny(missing_docs)]
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use dom::{TElement, TNode};
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use traversal::{DomTraversal, PerLevelTraversalData, PreTraverseToken};
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/// Do a sequential DOM traversal for layout or styling, generic over `D`.
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pub fn traverse_dom<N, D>(traversal: &D,
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root: N::ConcreteElement,
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token: PreTraverseToken)
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where N: TNode,
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D: DomTraversal<N>,
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{
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debug_assert!(token.should_traverse());
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fn doit<N, D>(traversal: &D, traversal_data: &mut PerLevelTraversalData,
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thread_local: &mut D::ThreadLocalContext, node: N)
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where N: TNode,
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D: DomTraversal<N>
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{
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traversal.process_preorder(traversal_data, thread_local, node);
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if let Some(el) = node.as_element() {
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if let Some(ref mut depth) = traversal_data.current_dom_depth {
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*depth += 1;
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}
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D::traverse_children(el, |kid| doit(traversal, traversal_data, thread_local, kid));
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if let Some(ref mut depth) = traversal_data.current_dom_depth {
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*depth -= 1;
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}
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}
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if D::needs_postorder_traversal() {
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traversal.process_postorder(thread_local, node);
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}
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}
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let mut traversal_data = PerLevelTraversalData {
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current_dom_depth: None,
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};
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let mut tlc = traversal.create_thread_local_context();
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if token.traverse_unstyled_children_only() {
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for kid in root.as_node().children() {
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if kid.as_element().map_or(false, |el| el.get_data().is_none()) {
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doit(traversal, &mut traversal_data, &mut tlc, kid);
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}
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}
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} else {
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doit(traversal, &mut traversal_data, &mut tlc, root.as_node());
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}
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}
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