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69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// Copyright 2013 The Flutter 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 FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_
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#define FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_
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#include "flutter/fml/message_loop.h"
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#include "flutter/lib/ui/dart_wrapper.h"
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#include "flutter/lib/ui/painting/canvas.h"
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#include "flutter/lib/ui/text/line_metrics.h"
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#include "flutter/lib/ui/text/text_box.h"
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#include "flutter/third_party/txt/src/txt/paragraph.h"
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namespace tonic {
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class DartLibraryNatives;
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} // namespace tonic
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namespace flutter {
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class Paragraph : public RefCountedDartWrappable<Paragraph> {
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DEFINE_WRAPPERTYPEINFO();
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FML_FRIEND_MAKE_REF_COUNTED(Paragraph);
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public:
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static void Create(Dart_Handle paragraph_handle,
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std::unique_ptr<txt::Paragraph> txt_paragraph) {
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auto paragraph = fml::MakeRefCounted<Paragraph>(std::move(txt_paragraph));
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paragraph->AssociateWithDartWrapper(paragraph_handle);
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}
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~Paragraph() override;
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double width();
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double height();
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double longestLine();
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double minIntrinsicWidth();
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double maxIntrinsicWidth();
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double alphabeticBaseline();
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double ideographicBaseline();
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bool didExceedMaxLines();
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void layout(double width);
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void paint(Canvas* canvas, double x, double y);
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tonic::Float32List getRectsForRange(unsigned start,
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unsigned end,
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unsigned boxHeightStyle,
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unsigned boxWidthStyle);
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tonic::Float32List getRectsForPlaceholders();
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Dart_Handle getPositionForOffset(double dx, double dy);
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Dart_Handle getWordBoundary(unsigned offset);
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Dart_Handle getLineBoundary(unsigned offset);
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tonic::Float64List computeLineMetrics();
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size_t GetAllocationSize() const override;
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static void RegisterNatives(tonic::DartLibraryNatives* natives);
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private:
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std::unique_ptr<txt::Paragraph> m_paragraph;
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explicit Paragraph(std::unique_ptr<txt::Paragraph> paragraph);
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};
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} // namespace flutter
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#endif // FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_
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