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 #include "symbol_animation_config.h" 26 27 namespace OHOS { 28 namespace Rosen { 29 namespace TextEngine { 30 struct StrutMetrics { 31 double ascent = 0; 32 double descent = 0; 33 double halfLeading = 0; 34 }; 35 36 struct CalcResult { 37 bool need = true; 38 double ascent = 0; 39 double descent = 0; 40 }; 41 42 class TypographyImpl : public Typography { 43 public: 44 TypographyImpl(TypographyStyle &ys, std::vector<VariantSpan> &spans, 45 std::shared_ptr<FontProviders> providers); 46 47 double GetMaxWidth() const override; 48 double GetHeight() const override; 49 double GetActualWidth() const override; 50 double GetMinIntrinsicWidth() const override; 51 double GetMaxIntrinsicWidth() const override; 52 double GetAlphabeticBaseline() const override; 53 double GetIdeographicBaseline() const override; 54 bool DidExceedMaxLines() const override; 55 int GetLineCount() const override; 56 void SetIndents(const std::vector<float> &indents) override; 57 void Layout(double maxWidth) override; 58 59 void Paint(TexgineCanvas &canvas, double offsetX, double offsetY) override; 60 61 std::vector<TextRect> GetTextRectsByBoundary(Boundary boundary, 62 TextRectHeightStyle heightStyle, 63 TextRectWidthStyle widthStyle) const override; 64 std::vector<TextRect> GetTextRectsOfPlaceholders() const override; 65 IndexAndAffinity GetGlyphIndexByCoordinate(double x, double y) const override; 66 Boundary GetWordBoundaryByIndex(size_t index) const override; 67 Boundary GetActualTextRange(int lineNumber, bool includeSpaces) const override; 68 double GetLineHeight(int lineNumber); 69 double GetLineWidth(int lineNumber); 70 SetAnimation(std::function<bool (const std::shared_ptr<TextEngine::SymbolAnimationConfig> &)> & animationFunc)71 void SetAnimation( 72 std::function<bool( 73 const std::shared_ptr<TextEngine::SymbolAnimationConfig>&)>& animationFunc) override 74 { 75 if (animationFunc) { 76 animationFunc_ = animationFunc; 77 } 78 } 79 private: 80 81 std::function<bool(const std::shared_ptr<SymbolAnimationConfig>&)> animationFunc_ = nullptr; 82 83 void ReportMemoryUsage(const std::string &member, bool needThis) const override; 84 85 int ComputeStrut(); 86 void DoLayout(); 87 int UpdateMetrics(); 88 int UpdateSpanMetrics(VariantSpan &span, double &coveredAscent); 89 int DoUpdateSpanMetrics(const VariantSpan &span, const std::shared_ptr<TexgineFontMetrics> metrics, 90 const TextStyle &style, double &coveredAscent); 91 void UpadateAnySpanMetrics(std::shared_ptr<AnySpan> &span, double &coveredAscent, double &coveredDescent); 92 void ApplyAlignment(); 93 size_t FindGlyphTargetLine(double y) const; 94 size_t FindGlyphTargetIndex(size_t line, double x, double &offsetX, std::vector<double> &widths) const; 95 std::vector<TextRect> MergeRects(const std::vector<TextRect> &boxes, Boundary boundary) const; 96 void ComputeWordBoundary() const; 97 void ComputeSpans(int lineIndex, double baseline, const CalcResult &calcResult, 98 std::vector<TextRect> &lineBoxes) const; 99 std::vector<TextRect> GenTextRects(std::shared_ptr<TextSpan> &ts, double offsetX, double offsetY, 100 double spanGapWidth) const; 101 void ComputeRoundRect(VariantSpan& span, int& index, int& preIndex, LineMetrics& metric, 102 std::vector<VariantSpan>& groupSpans); 103 TypographyStyle typographyStyle_; 104 std::vector<VariantSpan> spans_; 105 std::shared_ptr<FontProviders> fontProviders_; 106 107 std::vector<LineMetrics> lineMetrics_; 108 mutable std::vector<Boundary> boundariesCache_; 109 bool didExceedMaxLines_ = false; 110 StrutMetrics strut_; 111 std::vector<double> baselines_; 112 std::vector<double> lineMaxAscent_; 113 std::vector<double> lineMaxCoveredAscent_; 114 std::vector<double> lineMaxCoveredDescent_; 115 double maxWidth_ = 0.0; 116 double maxLineWidth_ = 0.0; 117 float descent_ = 0.0; 118 double height_ = 0.0; 119 std::vector<double> yOffsets_ = {}; 120 double maxIntrinsicWidth_ = 0.0; 121 double minIntrinsicWidth_ = 0.0; 122 std::vector<float> indents_; 123 }; 124 } // namespace TextEngine 125 } // namespace Rosen 126 } // namespace OHOS 127 128 #endif // ROSEN_MODULES_TEXGINE_SRC_TYPOGRAPHY_IMPL_H 129