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