mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
68b06c8736
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.
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef SKY_ENGINE_CORE_TEXT_PARAGRAPH_H_
|
|
#define SKY_ENGINE_CORE_TEXT_PARAGRAPH_H_
|
|
|
|
#include "sky/engine/tonic/dart_wrappable.h"
|
|
#include "sky/engine/wtf/PassRefPtr.h"
|
|
#include "sky/engine/wtf/RefCounted.h"
|
|
#include "sky/engine/core/painting/Canvas.h"
|
|
#include "sky/engine/core/painting/Offset.h"
|
|
|
|
namespace blink {
|
|
|
|
class Paragraph : public RefCounted<Paragraph>, public DartWrappable {
|
|
DEFINE_WRAPPERTYPEINFO();
|
|
public:
|
|
static PassRefPtr<Paragraph> create() {
|
|
return adoptRef(new Paragraph());
|
|
}
|
|
|
|
~Paragraph() override;
|
|
|
|
double minWidth() const { return m_minWidth; }
|
|
void setMinWidth(double value) { m_minWidth = value; }
|
|
|
|
double maxWidth() const { return m_maxWidth; }
|
|
void setMaxWidth(double value) { m_maxWidth = value; }
|
|
|
|
double minHeight() const { return m_minHeight; }
|
|
void setMinHeight(double value) { m_minHeight = value; }
|
|
|
|
double maxHeight() const { return m_maxHeight; }
|
|
void setMaxHeight(double value) { m_maxHeight = value; }
|
|
|
|
double width();
|
|
double height();
|
|
double minIntrinsicWidth();
|
|
double maxIntrinsicWidth();
|
|
double alphabeticBaseline();
|
|
double ideographicBaseline();
|
|
|
|
void layout();
|
|
void paint(Canvas* canvas, const Offset& offset);
|
|
|
|
private:
|
|
double m_minWidth;
|
|
double m_maxWidth;
|
|
double m_minHeight;
|
|
double m_maxHeight;
|
|
|
|
explicit Paragraph();
|
|
};
|
|
|
|
} // namespace blink
|
|
|
|
#endif // SKY_ENGINE_CORE_TEXT_PARAGRAPH_H_
|