1 /* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef ROSEN_MODULES_TEXGINE_SRC_TYPOGRAPHY_IMPL_H 17 #define ROSEN_MODULES_TEXGINE_SRC_TYPOGRAPHY_IMPL_H 18 19 #include <string> 20 #include <vector> 21 22 #include "line_metrics.h" 23 #include "texgine/typography.h" 24 #include "texgine/typography_types.h" 25 26 namespace OHOS { 27 namespace Rosen { 28 namespace TextEngine { 29 struct StrutMetrics { 30 double ascent = 0; 31 double descent = 0; 32 double halfLeading = 0; 33 }; 34 35 struct CalcResult { 36 bool need = true; 37 double ascent = 0; 38 double descent = 0; 39 }; 40 41 class TypographyImpl : public Typography { 42 public: 43 TypographyImpl(TypographyStyle &ys, std::vector<VariantSpan> &spans, 44 std::shared_ptr<FontProviders> providers); 45 46 double GetMaxWidth() const override; 47 double GetHeight() const override; 48 double GetActualWidth() const override; 49 double GetMinIntrinsicWidth() const override; 50 double GetMaxIntrinsicWidth() const override; 51 double GetAlphabeticBaseline() const override; 52 double GetIdeographicBaseline() const override; 53 bool DidExceedMaxLines() const override; 54 int GetLineCount() const override; 55 void SetIndents(const std::vector<float> &indents) override; 56 void Layout(double maxWidth) override; 57 void Paint(TexgineCanvas &canvas, double offsetX, double offsetY) override; 58 std::vector<TextRect> GetTextRectsByBoundary(Boundary boundary, 59 TextRectHeightStyle heightStyle, 60 TextRectWidthStyle widthStyle) const override; 61 std::vector<TextRect> GetTextRectsOfPlaceholders() const override; 62 IndexAndAffinity GetGlyphIndexByCoordinate(double x, double y) const override; 63 Boundary GetWordBoundaryByIndex(size_t index) const override; 64 65 private: 66 void ReportMemoryUsage(const std::string &member, bool needThis) const override; 67 68 void ComputeIntrinsicWidth(); 69 void ConsiderEllipsis(); 70 int ComputeStrut(); 71 void DoLayout(); 72 int UpdateMetrics(); 73 int UpdateSpanMetrics(VariantSpan &span, double &coveredAscent); 74 int DoUpdateSpanMetrics(const VariantSpan &span, const TexgineFontMetrics &metrics, 75 const TextStyle &style, double &coveredAscent); 76 void UpadateAnySpanMetrics(std::shared_ptr<AnySpan> &span, double &coveredAscent, double &coveredDescent); 77 void ApplyAlignment(); 78 size_t FindGlyphTargetLine(double y) const; 79 size_t FindGlyphTargetIndex(size_t line, double x, double &offsetX, std::vector<double> &widths) const; 80 std::vector<TextRect> MergeRects(const std::vector<TextRect> &boxes, Boundary boundary) const; 81 void ComputeWordBoundary() const; 82 void ComputeSpans(int lineIndex, double baseline, const CalcResult &calcResult, 83 std::vector<TextRect> &lineBoxes) const; 84 85 TypographyStyle typographyStyle_; 86 std::vector<VariantSpan> spans_; 87 std::shared_ptr<FontProviders> fontProviders_; 88 89 std::vector<LineMetrics> lineMetrics_; 90 mutable std::vector<Boundary> boundariesCache_; 91 bool didExceedMaxLines_ = false; 92 StrutMetrics strut_; 93 std::vector<double> baselines_; 94 std::vector<double> lineMaxAscent_; 95 std::vector<double> lineMaxCoveredAscent_; 96 std::vector<double> lineMaxCoveredDescent_; 97 double maxWidth_ = 0.0; 98 double maxLineWidth_ = 0.0; 99 double height_ = 0.0; 100 double maxIntrinsicWidth_ = 0.0; 101 double minIntrinsicWidth_ = 0.0; 102 }; 103 } // namespace TextEngine 104 } // namespace Rosen 105 } // namespace OHOS 106 107 #endif // ROSEN_MODULES_TEXGINE_SRC_TYPOGRAPHY_IMPL_H 108