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0140555b54
We used to share memory between Dart strings and WTF::String objects by way of the Dart externalized strings. That used to be important when the DOM shared many strings between C++ and Dart. However, now that we don't retain strings in C++ much anymore, we don't need this complexity. This patch removes DartStringCache and the integration. It also unwinds several cases where we were converting back and forth between WTF::String and std::string for no reason. Now we use std::string more consistently. For the case of ParagraphBuilder::addText, we now take a raw const char*, which more closely matches the API the DartVM exposes. That means we do a single copy out of the VM and into the render tree at that point.
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef SKY_ENGINE_CORE_TEXT_PARAGRAPHBUILDER_H_
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#define SKY_ENGINE_CORE_TEXT_PARAGRAPHBUILDER_H_
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#include "sky/engine/core/text/Paragraph.h"
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#include "sky/engine/tonic/dart_wrappable.h"
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#include "sky/engine/tonic/int32_list.h"
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#include "sky/engine/wtf/PassRefPtr.h"
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#include "sky/engine/wtf/RefCounted.h"
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namespace blink {
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class DartLibraryNatives;
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class ParagraphBuilder : public RefCounted<ParagraphBuilder>, public DartWrappable {
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DEFINE_WRAPPERTYPEINFO();
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public:
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static PassRefPtr<ParagraphBuilder> create() {
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return adoptRef(new ParagraphBuilder());
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}
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~ParagraphBuilder() override;
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void pushStyle(Int32List& encoded, const std::string& fontFamily, double fontSize, double letterSpacing, double wordSpacing, double lineHeight);
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void pop();
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void addText(const std::string& text);
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PassRefPtr<Paragraph> build(Int32List& encoded, double lineHeight);
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static void RegisterNatives(DartLibraryNatives* natives);
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private:
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explicit ParagraphBuilder();
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void createRenderView();
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OwnPtr<RenderView> m_renderView;
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RenderObject* m_renderParagraph;
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RenderObject* m_currentRenderObject;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_TEXT_PARAGRAPHBUILDER_H_
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