| /* |
| * Copyright 2019 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef LIB_TXT_SRC_PARAGRAPH_SKIA_H_ |
| #define LIB_TXT_SRC_PARAGRAPH_SKIA_H_ |
| |
| #include <optional> |
| |
| #include "txt/paragraph.h" |
| |
| #include "third_party/skia/modules/skparagraph/include/Paragraph.h" |
| |
| namespace txt { |
| |
| // Implementation of Paragraph based on Skia's text layout module. |
| class ParagraphSkia : public Paragraph { |
| public: |
| ParagraphSkia(std::unique_ptr<skia::textlayout::Paragraph> paragraph); |
| |
| virtual ~ParagraphSkia() = default; |
| |
| double GetMaxWidth() override; |
| |
| double GetHeight() override; |
| |
| double GetLongestLine() override; |
| |
| double GetMinIntrinsicWidth() override; |
| |
| double GetMaxIntrinsicWidth() override; |
| |
| double GetAlphabeticBaseline() override; |
| |
| double GetIdeographicBaseline() override; |
| |
| std::vector<LineMetrics>& GetLineMetrics() override; |
| |
| bool DidExceedMaxLines() override; |
| |
| void Layout(double width) override; |
| |
| void Paint(SkCanvas* canvas, double x, double y) override; |
| |
| std::vector<TextBox> GetRectsForRange( |
| size_t start, |
| size_t end, |
| RectHeightStyle rect_height_style, |
| RectWidthStyle rect_width_style) override; |
| |
| std::vector<TextBox> GetRectsForPlaceholders() override; |
| |
| PositionWithAffinity GetGlyphPositionAtCoordinate(double dx, |
| double dy) override; |
| |
| Range<size_t> GetWordBoundary(size_t offset) override; |
| |
| private: |
| std::unique_ptr<skia::textlayout::Paragraph> paragraph_; |
| std::optional<std::vector<LineMetrics>> line_metrics_; |
| std::vector<TextStyle> line_metrics_styles_; |
| }; |
| |
| } // namespace txt |
| |
| #endif // LIB_TXT_SRC_PARAGRAPH_SKIA_H_ |