b67d73a661
We now apply first letter styles by splitting text with a first-letter style applied into 2 `TextSliceNode` objects. The `DOM::Text` layout node always points at the non first-letter slice and the first-letter slice is reachable via `TextSliceNode::first_letter_slice()`. First letter splitting works by `TreeBuilder` walking a block container's inline descendants to find the first typographic letter unit per the pattern given in css-pseudo level 4, which is then wrapped in an anonymous inline box styled with the `::first-letter` computed properties. Consumers that map between DOM offsets and layout geometry are updated to visit all slices of a `DOM::Text` through `TextOffsetMapping`.
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
/*
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* Copyright (c) 2018-2023, 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/Utf16String.h>
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#include <LibWeb/Layout/BlockContainer.h>
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namespace Web::Layout {
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class Viewport final : public BlockContainer {
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GC_CELL(Viewport, BlockContainer);
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GC_DECLARE_ALLOCATOR(Viewport);
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public:
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explicit Viewport(DOM::Document&, GC::Ref<CSS::ComputedProperties>);
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virtual ~Viewport() override;
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struct TextPosition {
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GC::Ref<DOM::Text> dom_node;
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size_t start_offset { 0 };
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size_t dom_offset_within_node { 0 };
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};
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struct TextBlock {
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Utf16String text;
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Vector<TextPosition> positions;
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};
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Vector<TextBlock> const& text_blocks();
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void invalidate_text_blocks_cache() { m_text_blocks.clear(); }
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DOM::Document const& dom_node() const;
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virtual void visit_edges(Visitor&) override;
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private:
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virtual RefPtr<Painting::Paintable> create_paintable() const override;
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void update_text_blocks();
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virtual bool is_viewport() const override { return true; }
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Optional<Vector<TextBlock>> m_text_blocks;
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};
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template<>
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inline bool Node::fast_is<Viewport>() const { return is_viewport(); }
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}
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