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https://github.com/LadybirdBrowser/ladybird
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d1d739b533
When content-visibility:hidden starts skipping a subtree, clear the stale layout and paint nodes for its descendants. Preserve SVG mask, clipPath, and pattern resource boxes only when they are attached to a referencing layout subtree outside the subtree being hidden. Resources used inside the hidden subtree are cleared with that subtree, so they rebuild under the live referencing layout node when the subtree becomes visible again. Otherwise observed descendants can keep old paintables around after the current paint tree has been rebuilt without them.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibGC/Ptr.h>
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#include <LibWeb/Forward.h>
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namespace Web::Layout {
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class TreeBuilder {
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public:
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TreeBuilder();
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GC::Ptr<Layout::Node> build(DOM::Node&);
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private:
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struct Context {
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bool has_svg_root = false;
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bool layout_top_layer = false;
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bool layout_svg_mask_or_clip_path = false;
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bool layout_svg_pattern = false;
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};
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i32 calculate_list_item_index(DOM::Node&);
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void update_layout_tree_before_children(DOM::Node&, GC::Ref<Layout::Node>, Context&, bool element_has_content_visibility_hidden);
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void update_layout_tree_after_children(DOM::Node&, GC::Ref<Layout::Node>, Context&, bool element_has_content_visibility_hidden);
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void wrap_in_button_layout_tree_if_needed(DOM::Node&, GC::Ref<Layout::Node>);
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enum class MustCreateSubtree {
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No,
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Yes,
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};
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void update_layout_tree(DOM::Node&, Context&, MustCreateSubtree);
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TraversalDecision clear_stale_layout_and_paint_node(DOM::Node&, DOM::Node const* content_visibility_hidden_root = nullptr);
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void push_parent(Layout::NodeWithStyle& node) { m_ancestor_stack.append(node); }
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void pop_parent() { m_ancestor_stack.take_last(); }
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template<CSS::DisplayInternal, typename Callback>
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void for_each_in_tree_with_internal_display(NodeWithStyle& root, Callback);
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template<CSS::DisplayInside, typename Callback>
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void for_each_in_tree_with_inside_display(NodeWithStyle& root, Callback);
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void fixup_tables(NodeWithStyle& root);
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void remove_irrelevant_boxes(NodeWithStyle& root);
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void generate_missing_child_wrappers(NodeWithStyle& root);
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Vector<GC::Root<Box>> generate_missing_parents(NodeWithStyle& root);
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void missing_cells_fixup(Vector<GC::Root<Box>> const&);
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enum class AppendOrPrepend {
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Append,
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Prepend,
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};
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void insert_node_into_inline_or_block_ancestor(Layout::Node&, CSS::Display, AppendOrPrepend);
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GC::Ptr<NodeWithStyle> create_pseudo_element_if_needed(DOM::Element&, CSS::PseudoElement, Optional<AppendOrPrepend>);
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void restructure_block_node_in_inline_parent(NodeWithStyleAndBoxModelMetrics&);
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GC::Ptr<Layout::Node> m_layout_root;
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Vector<GC::Ref<Layout::NodeWithStyle>> m_ancestor_stack;
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u32 m_quote_nesting_level { 0 };
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};
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}
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