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https://github.com/LadybirdBrowser/ladybird.git
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c01d810e5a
DOM nodes now have two additional flags: - Needs layout tree update - Child needs layout tree update These work similarly to the needs-style-update flags, but instead signal the need to rebuild the corresponding part of the layout tree. When a specific DOM node needs a layout tree update, we try to create a new subtree starting at that node, and then replace the subtree in the old layout tree with the newly created subtree. This required some refactoring in TreeBuilder so that we can skip over entire subtrees during a tree update. Note that no partial updates happen yet (as of this commit) since we always invalidate the full layout tree still. That will change in the next commit.
68 lines
2.1 KiB
C++
68 lines
2.1 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 <AK/RefPtr.h>
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#include <LibGC/Ptr.h>
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#include <LibWeb/CSS/Display.h>
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#include <LibWeb/CSS/Selector.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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};
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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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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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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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void create_pseudo_element_if_needed(DOM::Element&, CSS::Selector::PseudoElement::Type, AppendOrPrepend);
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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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