| // Copyright 2019 Google LLC. |
| #ifndef Paragraph_DEFINED |
| #define Paragraph_DEFINED |
| |
| #include "modules/skparagraph/include/FontCollection.h" |
| #include "modules/skparagraph/include/Metrics.h" |
| #include "modules/skparagraph/include/ParagraphStyle.h" |
| #include "modules/skparagraph/include/TextStyle.h" |
| |
| class SkCanvas; |
| |
| namespace skia { |
| namespace textlayout { |
| |
| class Paragraph { |
| |
| public: |
| Paragraph(ParagraphStyle style, sk_sp<FontCollection> fonts) |
| : fFontCollection(std::move(fonts)), fParagraphStyle(std::move(style)) {} |
| |
| virtual ~Paragraph() = default; |
| |
| SkScalar getMaxWidth() { return fWidth; } |
| |
| SkScalar getHeight() { return fHeight; } |
| |
| SkScalar getMinIntrinsicWidth() { return fMinIntrinsicWidth; } |
| |
| SkScalar getMaxIntrinsicWidth() { return fMaxIntrinsicWidth; } |
| |
| SkScalar getAlphabeticBaseline() { return fAlphabeticBaseline; } |
| |
| SkScalar getIdeographicBaseline() { return fIdeographicBaseline; } |
| |
| SkScalar getLongestLine() { return fLongestLine; } |
| |
| bool didExceedMaxLines() { return fExceededMaxLines; } |
| |
| virtual void layout(SkScalar width) = 0; |
| |
| virtual void paint(SkCanvas* canvas, SkScalar x, SkScalar y) = 0; |
| |
| // Returns a vector of bounding boxes that enclose all text between |
| // start and end glyph indexes, including start and excluding end |
| virtual std::vector<TextBox> getRectsForRange(unsigned start, |
| unsigned end, |
| RectHeightStyle rectHeightStyle, |
| RectWidthStyle rectWidthStyle) = 0; |
| |
| virtual std::vector<TextBox> getRectsForPlaceholders() = 0; |
| |
| // Returns the index of the glyph that corresponds to the provided coordinate, |
| // with the top left corner as the origin, and +y direction as down |
| virtual PositionWithAffinity getGlyphPositionAtCoordinate(SkScalar dx, SkScalar dy) = 0; |
| |
| // Finds the first and last glyphs that define a word containing |
| // the glyph at index offset |
| virtual SkRange<size_t> getWordBoundary(unsigned offset) = 0; |
| |
| virtual void getLineMetrics(std::vector<LineMetrics>&) = 0; |
| |
| virtual size_t lineNumber() = 0; |
| |
| virtual void markDirty() = 0; |
| |
| // Experimental API that allows fast way to update "immutable" paragraph |
| virtual void updateTextAlign(TextAlign textAlign) = 0; |
| virtual void updateText(size_t from, SkString text) = 0; |
| virtual void updateFontSize(size_t from, size_t to, SkScalar fontSize) = 0; |
| virtual void updateForegroundPaint(size_t from, size_t to, SkPaint paint) = 0; |
| virtual void updateBackgroundPaint(size_t from, size_t to, SkPaint paint) = 0; |
| |
| protected: |
| sk_sp<FontCollection> fFontCollection; |
| ParagraphStyle fParagraphStyle; |
| |
| // Things for Flutter |
| SkScalar fAlphabeticBaseline; |
| SkScalar fIdeographicBaseline; |
| SkScalar fHeight; |
| SkScalar fWidth; |
| SkScalar fMaxIntrinsicWidth; |
| SkScalar fMinIntrinsicWidth; |
| SkScalar fLongestLine; |
| bool fExceededMaxLines; |
| }; |
| } // namespace textlayout |
| } // namespace skia |
| |
| #endif // Paragraph_DEFINED |