268b9c5d90
This removes a set of complex reference cycles between DOM, layout tree and browsing context. It also makes lifetimes much easier to reason about, as the DOM and layout trees are now free to keep each other alive.
64 lines
1.6 KiB
C++
64 lines
1.6 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 : public Node {
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JS_CELL(TextNode, Node);
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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 { return m_text_for_rendering; }
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struct Chunk {
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Utf8View view;
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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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};
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class ChunkIterator {
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public:
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ChunkIterator(StringView text, bool wrap_lines, bool respect_linebreaks, bool is_generated_empty_string);
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Optional<Chunk> next();
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private:
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Optional<Chunk> try_commit_chunk(Utf8View::Iterator const& start, Utf8View::Iterator const& end, bool has_breaking_newline) const;
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bool const m_wrap_lines;
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bool const m_respect_linebreaks;
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bool m_should_emit_one_empty_chunk { false };
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Utf8View m_utf8_view;
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Utf8View::Iterator m_iterator;
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};
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void compute_text_for_rendering(bool collapse);
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virtual RefPtr<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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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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