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44 lines
1.5 KiB
Rust
44 lines
1.5 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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use dom::TNode;
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use traversal::{DomTraversalContext, PerLevelTraversalData};
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pub fn traverse_dom<N, C>(root: N,
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shared: &C::SharedContext)
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where N: TNode,
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C: DomTraversalContext<N>
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{
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fn doit<'a, N, C>(context: &'a C, node: N, data: &mut PerLevelTraversalData)
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where N: TNode,
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C: DomTraversalContext<N>
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{
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context.process_preorder(node, data);
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if let Some(el) = node.as_element() {
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if let Some(ref mut depth) = data.current_dom_depth {
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*depth += 1;
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}
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C::traverse_children(el, |kid| doit::<N, C>(context, kid, data));
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// NB: Data is unused now, but we can always decrement the count
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// here if we need it for the post-order one :)
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}
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if context.needs_postorder_traversal() {
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context.process_postorder(node);
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}
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}
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let mut data = PerLevelTraversalData {
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current_dom_depth: None,
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};
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let context = C::new(shared, root.opaque());
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doit::<N, C>(&context, root, &mut data);
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// Clear the local LRU cache since we store stateful elements inside.
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context.local_context().style_sharing_candidate_cache.borrow_mut().clear();
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}
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