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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_BUILDER_H_
#define FLUTTER_LIB_UI_TEXT_PARAGRAPH_BUILDER_H_
#include <memory>
#include "flutter/lib/ui/dart_wrapper.h"
#include "flutter/lib/ui/painting/paint.h"
#include "flutter/lib/ui/text/paragraph.h"
#include "flutter/third_party/txt/src/txt/paragraph_builder.h"
#include "third_party/tonic/typed_data/typed_list.h"
namespace tonic {
class DartLibraryNatives;
} // namespace tonic
namespace flutter {
class Paragraph;
class ParagraphBuilder : public RefCountedDartWrappable<ParagraphBuilder> {
DEFINE_WRAPPERTYPEINFO();
FML_FRIEND_MAKE_REF_COUNTED(ParagraphBuilder);
public:
static fml::RefPtr<ParagraphBuilder> create(
tonic::Int32List& encoded,
Dart_Handle strutData,
const std::string& fontFamily,
const std::vector<std::string>& strutFontFamilies,
double fontSize,
double height,
const std::u16string& ellipsis,
const std::string& locale);
~ParagraphBuilder() override;
void pushStyle(tonic::Int32List& encoded,
const std::vector<std::string>& fontFamilies,
double fontSize,
double letterSpacing,
double wordSpacing,
double height,
double decorationThickness,
const std::string& locale,
Dart_Handle background_objects,
Dart_Handle background_data,
Dart_Handle foreground_objects,
Dart_Handle foreground_data,
Dart_Handle shadows_data,
Dart_Handle font_features_data);
void pop();
Dart_Handle addText(const std::u16string& text);
// Pushes the information requried to leave an open space, where Flutter may
// draw a custom placeholder into.
//
// Internally, this method adds a single object replacement character (0xFFFC)
// and emplaces a new PlaceholderRun instance to the vector of inline
// placeholders.
Dart_Handle addPlaceholder(double width,
double height,
unsigned alignment,
double baseline_offset,
unsigned baseline);
void build(Dart_Handle paragraph_handle);
static void RegisterNatives(tonic::DartLibraryNatives* natives);
private:
explicit ParagraphBuilder(tonic::Int32List& encoded,
Dart_Handle strutData,
const std::string& fontFamily,
const std::vector<std::string>& strutFontFamilies,
double fontSize,
double height,
const std::u16string& ellipsis,
const std::string& locale);
std::unique_ptr<txt::ParagraphBuilder> m_paragraphBuilder;
};
} // namespace flutter
#endif // FLUTTER_LIB_UI_TEXT_PARAGRAPH_BUILDER_H_