11e7d72686
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Append text chunks to either the start or end of the text fragment, depending on the text direction. The direction is determined by what script its code points are from.
72 lines
1.9 KiB
C++
72 lines
1.9 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/Utf8View.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 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(StringView text, bool wrap_lines, bool respect_linebreaks, Gfx::FontCascadeList const&);
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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(Utf8View::Iterator const& start, Utf8View::Iterator const& end, bool has_breaking_newline, 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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Utf8View::Iterator m_iterator;
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Gfx::FontCascadeList const& m_font_cascade_list;
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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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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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};
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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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