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