ca363f0024
Implements the "top layer" concept from "CSS Positioned Layout Module Level 4" specification. - The tree builder is modified to ensure that layout nodes created by top layer elements are children of the viewport. - Implements missing steps in `showModal()` to add an element top top layer. - Implements missing steps in `close()` to remove an element from top layer. Further steps could be: - Add support for `::backdrop` pseudo-element. - Implement the "inert" concept from HTML spec to block hit-testing when element from top layer is displayed.
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.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 <LibJS/Heap/GCPtr.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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JS::GCPtr<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_svg_mask = false;
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bool layout_top_layer = false;
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};
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i32 calculate_list_item_index(DOM::Node&);
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void create_layout_tree(DOM::Node&, Context&);
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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<JS::Handle<Box>> generate_missing_parents(NodeWithStyle& root);
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void missing_cells_fixup(Vector<JS::Handle<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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JS::GCPtr<Layout::Node> m_layout_root;
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Vector<JS::NonnullGCPtr<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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