Merge "Revert "Implement minikin::Run"" (ea0b479e) · Commits · e / os / android_frameworks_base

core/jni/android_text_StaticLayout.cpp

+165 −7

Original line number	Diff line number	Diff line
		@@ -36,7 +36,7 @@
		#include <hwui/MinikinUtils.h>
		#include <hwui/Paint.h>
		#include <minikin/FontCollection.h>
		#include <minikin/AndroidLineBreakerHelper.h>
		#include <minikin/LineBreaker.h>
		#include <minikin/MinikinFont.h>

		namespace android {
		@@ -52,6 +52,63 @@ struct JLineBreaksID {
		static jclass gLineBreaks_class;
		static JLineBreaksID gLineBreaks_fieldID;

		class JNILineBreakerLineWidth : public minikin::LineBreaker::LineWidthDelegate {
		public:
		JNILineBreakerLineWidth(float firstWidth, int32_t firstLineCount, float restWidth,
		const std::vector<float>& indents, const std::vector<float>& leftPaddings,
		const std::vector<float>& rightPaddings, int32_t indentsAndPaddingsOffset)
		: mFirstWidth(firstWidth), mFirstLineCount(firstLineCount), mRestWidth(restWidth),
		mIndents(indents), mLeftPaddings(leftPaddings),
		mRightPaddings(rightPaddings), mOffset(indentsAndPaddingsOffset) {}

		float getLineWidth(size_t lineNo) override {
		const float width = ((ssize_t)lineNo < (ssize_t)mFirstLineCount)
		? mFirstWidth : mRestWidth;
		return width - get(mIndents, lineNo);
		}

		float getMinLineWidth() override {
		// A simpler algorithm would have been simply looping until the larger of
		// mFirstLineCount and mIndents.size()-mOffset, but that does unnecessary calculations
		// when mFirstLineCount is large. Instead, we measure the first line, all the lines that
		// have an indent, and the first line after firstWidth ends and restWidth starts.
		float minWidth = std::min(getLineWidth(0), getLineWidth(mFirstLineCount));
		for (size_t lineNo = 1; lineNo + mOffset < mIndents.size(); lineNo++) {
		minWidth = std::min(minWidth, getLineWidth(lineNo));
		}
		return minWidth;
		}

		float getLeftPadding(size_t lineNo) override {
		return get(mLeftPaddings, lineNo);
		}

		float getRightPadding(size_t lineNo) override {
		return get(mRightPaddings, lineNo);
		}

		private:
		float get(const std::vector<float>& vec, size_t lineNo) {
		if (vec.empty()) {
		return 0;
		}
		const size_t index = lineNo + mOffset;
		if (index < vec.size()) {
		return vec[index];
		} else {
		return vec.back();
		}
		}

		const float mFirstWidth;
		const int32_t mFirstLineCount;
		const float mRestWidth;
		const std::vector<float>& mIndents;
		const std::vector<float>& mLeftPaddings;
		const std::vector<float>& mRightPaddings;
		const int32_t mOffset;
		};

		static inline std::vector<float> jintArrayToFloatVector(JNIEnv* env, jintArray javaArray) {
		if (javaArray == nullptr) {
		return std::vector<float>();
		@@ -61,8 +118,109 @@ static inline std::vector<float> jintArrayToFloatVector(JNIEnv* env, jintArray j
		}
		}

		static inline minikin::android::StaticLayoutNative* toNative(jlong ptr) {
		return reinterpret_cast<minikin::android::StaticLayoutNative*>(ptr);
		class Run {
		public:
		Run(int32_t start, int32_t end) : mRange(start, end) {}
		virtual ~Run() {}

		virtual void addTo(minikin::LineBreaker* lineBreaker) = 0;

		protected:
		minikin::Range mRange;

		private:
		// Forbid copy and assign.
		Run(const Run&) = delete;
		void operator=(const Run&) = delete;
		};

		class StyleRun : public Run {
		public:
		StyleRun(int32_t start, int32_t end, minikin::MinikinPaint&& paint,
		std::shared_ptr<minikin::FontCollection>&& collection, bool isRtl)
		: Run(start, end), mPaint(std::move(paint)), mCollection(std::move(collection)),
		mIsRtl(isRtl) {}

		void addTo(minikin::LineBreaker* lineBreaker) override {
		lineBreaker->addStyleRun(&mPaint, mCollection, mRange, mIsRtl);
		}

		private:
		minikin::MinikinPaint mPaint;
		std::shared_ptr<minikin::FontCollection> mCollection;
		const bool mIsRtl;
		};

		class Replacement : public Run {
		public:
		Replacement(int32_t start, int32_t end, float width, uint32_t localeListId)
		: Run(start, end), mWidth(width), mLocaleListId(localeListId) {}

		void addTo(minikin::LineBreaker* lineBreaker) override {
		lineBreaker->addReplacement(mRange, mWidth, mLocaleListId);
		}

		private:
		const float mWidth;
		const uint32_t mLocaleListId;
		};

		class StaticLayoutNative {
		public:
		StaticLayoutNative(
		minikin::BreakStrategy strategy, minikin::HyphenationFrequency frequency,
		bool isJustified, std::vector<float>&& indents, std::vector<float>&& leftPaddings,
		std::vector<float>&& rightPaddings)
		: mStrategy(strategy), mFrequency(frequency), mIsJustified(isJustified),
		mIndents(std::move(indents)), mLeftPaddings(std::move(leftPaddings)),
		mRightPaddings(std::move(rightPaddings)) {}

		void addStyleRun(int32_t start, int32_t end, minikin::MinikinPaint&& paint,
		std::shared_ptr<minikin::FontCollection> collection, bool isRtl) {
		mRuns.emplace_back(std::make_unique<StyleRun>(
		start, end, std::move(paint), std::move(collection), isRtl));
		}

		void addReplacementRun(int32_t start, int32_t end, float width, uint32_t localeListId) {
		mRuns.emplace_back(std::make_unique<Replacement>(start, end, width, localeListId));
		}

		// Only valid while this instance is alive.
		inline std::unique_ptr<minikin::LineBreaker::LineWidthDelegate> buildLineWidthDelegate(
		float firstWidth, int32_t firstLineCount, float restWidth,
		int32_t indentsAndPaddingsOffset) {
		return std::make_unique<JNILineBreakerLineWidth>(
		firstWidth, firstLineCount, restWidth, mIndents, mLeftPaddings, mRightPaddings,
		indentsAndPaddingsOffset);
		}

		void addRuns(minikin::LineBreaker* lineBreaker) {
		for (const auto& run : mRuns) {
		run->addTo(lineBreaker);
		}
		}

		void clearRuns() {
		mRuns.clear();
		}

		inline minikin::BreakStrategy getStrategy() const { return mStrategy; }
		inline minikin::HyphenationFrequency getFrequency() const { return mFrequency; }
		inline bool isJustified() const { return mIsJustified; }

		private:
		const minikin::BreakStrategy mStrategy;
		const minikin::HyphenationFrequency mFrequency;
		const bool mIsJustified;
		const std::vector<float> mIndents;
		const std::vector<float> mLeftPaddings;
		const std::vector<float> mRightPaddings;

		std::vector<std::unique_ptr<Run>> mRuns;
		};

		static inline StaticLayoutNative* toNative(jlong ptr) {
		return reinterpret_cast<StaticLayoutNative*>(ptr);
		}

		// set text and set a number of parameters for creating a layout (width, tabstops, strategy,
		@@ -70,7 +228,7 @@ static inline minikin::android::StaticLayoutNative* toNative(jlong ptr) {
		static jlong nInit(JNIEnv* env, jclass /* unused */,
		jint breakStrategy, jint hyphenationFrequency, jboolean isJustified,
		jintArray indents, jintArray leftPaddings, jintArray rightPaddings) {
		return reinterpret_cast<jlong>(new minikin::android::StaticLayoutNative(
		return reinterpret_cast<jlong>(new StaticLayoutNative(
		static_cast<minikin::BreakStrategy>(breakStrategy),
		static_cast<minikin::HyphenationFrequency>(hyphenationFrequency),
		isJustified,
		@@ -133,7 +291,7 @@ static jint nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr,
		jintArray recycleFlags,
		jfloatArray charWidths) {

		minikin::android::StaticLayoutNative* builder = toNative(nativePtr);
		StaticLayoutNative* builder = toNative(nativePtr);

		ScopedCharArrayRO text(env, javaText);

		@@ -169,7 +327,7 @@ static jint nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr,
		// Basically similar to Paint.getTextRunAdvances but with C++ interface
		// CriticalNative
		static void nAddStyleRun(jlong nativePtr, jlong nativePaint, jint start, jint end, jboolean isRtl) {
		minikin::android::StaticLayoutNative* builder = toNative(nativePtr);
		StaticLayoutNative* builder = toNative(nativePtr);
		Paint* paint = reinterpret_cast<Paint*>(nativePaint);
		const Typeface* typeface = Typeface::resolveDefault(paint->getAndroidTypeface());
		minikin::MinikinPaint minikinPaint = MinikinUtils::prepareMinikinPaint(paint, typeface);
		@@ -179,7 +337,7 @@ static void nAddStyleRun(jlong nativePtr, jlong nativePaint, jint start, jint en
		// CriticalNative
		static void nAddReplacementRun(jlong nativePtr, jlong nativePaint, jint start, jint end,
		jfloat width) {
		minikin::android::StaticLayoutNative* builder = toNative(nativePtr);
		StaticLayoutNative* builder = toNative(nativePtr);
		Paint* paint = reinterpret_cast<Paint*>(nativePaint);
		builder->addReplacementRun(start, end, width, paint->getMinikinLocaleListId());
		}