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80 lines
2.1 KiB
C++
80 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/Utf8View.h>
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#include <LibUnicode/Segmenter.h>
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#include <LibWeb/DOM/Text.h>
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#include <LibWeb/Layout/Node.h>
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namespace Web::Layout {
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class LineBoxFragment;
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class TextNode final : public Node {
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JS_CELL(TextNode, Node);
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JS_DECLARE_ALLOCATOR(TextNode);
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public:
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TextNode(DOM::Document&, DOM::Text&);
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virtual ~TextNode() override;
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const DOM::Text& dom_node() const { return static_cast<const DOM::Text&>(*Node::dom_node()); }
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String const& text_for_rendering() const;
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struct Chunk {
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Utf8View view;
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NonnullRefPtr<Gfx::Font> font;
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size_t start { 0 };
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size_t length { 0 };
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bool has_breaking_newline { false };
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bool has_breaking_tab { false };
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bool is_all_whitespace { false };
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Gfx::GlyphRun::TextType text_type;
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};
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class ChunkIterator {
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public:
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ChunkIterator(TextNode const&, bool wrap_lines, bool respect_linebreaks);
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Optional<Chunk> next();
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Optional<Chunk> peek(size_t);
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private:
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Optional<Chunk> next_without_peek();
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Optional<Chunk> try_commit_chunk(size_t start, size_t end, bool has_breaking_newline, bool has_breaking_tab, Gfx::Font const&, Gfx::GlyphRun::TextType) const;
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bool const m_wrap_lines;
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bool const m_respect_linebreaks;
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Utf8View m_utf8_view;
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Gfx::FontCascadeList const& m_font_cascade_list;
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Unicode::Segmenter& m_grapheme_segmenter;
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size_t m_current_index { 0 };
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Vector<Chunk> m_peek_queue;
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};
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void invalidate_text_for_rendering();
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void compute_text_for_rendering();
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Unicode::Segmenter& grapheme_segmenter() const;
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virtual JS::GCPtr<Painting::Paintable> create_paintable() const override;
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private:
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virtual bool is_text_node() const final { return true; }
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Optional<String> m_text_for_rendering;
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mutable OwnPtr<Unicode::Segmenter> m_grapheme_segmenter;
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};
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template<>
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inline bool Node::fast_is<TextNode>() const { return is_text_node(); }
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}
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