1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
---|---|
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. |
4 | |
5 | #ifndef FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_ |
6 | #define FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_ |
7 | |
8 | #include "flutter/fml/message_loop.h" |
9 | #include "flutter/lib/ui/dart_wrapper.h" |
10 | #include "flutter/lib/ui/painting/canvas.h" |
11 | #include "flutter/lib/ui/text/line_metrics.h" |
12 | #include "flutter/lib/ui/text/text_box.h" |
13 | #include "flutter/third_party/txt/src/txt/paragraph.h" |
14 | |
15 | namespace tonic { |
16 | class DartLibraryNatives; |
17 | } // namespace tonic |
18 | |
19 | namespace flutter { |
20 | |
21 | class Paragraph : public RefCountedDartWrappable<Paragraph> { |
22 | DEFINE_WRAPPERTYPEINFO(); |
23 | FML_FRIEND_MAKE_REF_COUNTED(Paragraph); |
24 | |
25 | public: |
26 | static void Create(Dart_Handle paragraph_handle, |
27 | std::unique_ptr<txt::Paragraph> txt_paragraph) { |
28 | auto paragraph = fml::MakeRefCounted<Paragraph>(std::move(txt_paragraph)); |
29 | paragraph->AssociateWithDartWrapper(paragraph_handle); |
30 | } |
31 | |
32 | ~Paragraph() override; |
33 | |
34 | double width(); |
35 | double height(); |
36 | double longestLine(); |
37 | double minIntrinsicWidth(); |
38 | double maxIntrinsicWidth(); |
39 | double alphabeticBaseline(); |
40 | double ideographicBaseline(); |
41 | bool didExceedMaxLines(); |
42 | |
43 | void layout(double width); |
44 | void paint(Canvas* canvas, double x, double y); |
45 | |
46 | tonic::Float32List getRectsForRange(unsigned start, |
47 | unsigned end, |
48 | unsigned boxHeightStyle, |
49 | unsigned boxWidthStyle); |
50 | tonic::Float32List getRectsForPlaceholders(); |
51 | Dart_Handle getPositionForOffset(double dx, double dy); |
52 | Dart_Handle getWordBoundary(unsigned offset); |
53 | Dart_Handle getLineBoundary(unsigned offset); |
54 | tonic::Float64List computeLineMetrics(); |
55 | |
56 | size_t GetAllocationSize() const override; |
57 | |
58 | static void RegisterNatives(tonic::DartLibraryNatives* natives); |
59 | |
60 | private: |
61 | std::unique_ptr<txt::Paragraph> m_paragraph; |
62 | |
63 | explicit Paragraph(std::unique_ptr<txt::Paragraph> paragraph); |
64 | }; |
65 | |
66 | } // namespace flutter |
67 | |
68 | #endif // FLUTTER_LIB_UI_TEXT_PARAGRAPH_H_ |
69 |