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Rather than using the DOM to upload text and styling information into the engine, this patch begins sketching a more direct API that bypasses the DOM and CSS. Currently, this API doesn't do anything, but it's a first step. The approach is to have a ParagraphBuilder object that can record a tree of style interior nodes and text leaves. The build() function then applies container-level styling information (such as TextAlign) and returns a Paragraph object that can undergo layout and paint. The inputs to the builder process are immutable style objects constructed from primitive values. These primitives are currently carbon-copies of the primitive we use in the framework today. After this patch lands, I'll convert the frame to re-expose these values instead of re-defining them.
32 lines
1001 B
C++
32 lines
1001 B
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_PARAGRAPHSTYLE_H_
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#define SKY_ENGINE_CORE_TEXT_PARAGRAPHSTYLE_H_
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#include "sky/engine/core/text/TextAlign.h"
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#include "sky/engine/core/text/TextBaseline.h"
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#include "sky/engine/tonic/dart_wrappable.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 ParagraphStyle : public RefCounted<ParagraphStyle>, public DartWrappable {
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DEFINE_WRAPPERTYPEINFO();
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public:
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static PassRefPtr<ParagraphStyle> create(int align = 0, double lineHeight = 0.0, int textBaseline = 0) {
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return adoptRef(new ParagraphStyle(align, lineHeight, textBaseline));
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}
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~ParagraphStyle() override;
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private:
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explicit ParagraphStyle(int align, double lineHeight, int textBaseline);
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_TEXT_PARAGRAPHSTYLE_H_
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