blob: 90e4bb64133e994045336521f5e96d36967fbbc6 [file] [log] [blame]
* Copyright (C) 2014 The Android Open Source Project
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#define LOG_TAG "StaticLayout"
#include "ScopedIcuLocale.h"
#include "unicode/locid.h"
#include "unicode/brkiter.h"
#include "utils/misc.h"
#include "utils/Log.h"
#include "ScopedStringChars.h"
#include "ScopedPrimitiveArray.h"
#include "JNIHelp.h"
#include "core_jni_helpers.h"
#include <cstdint>
#include <vector>
#include <list>
#include <algorithm>
#include "SkPaint.h"
#include "SkTypeface.h"
#include "MinikinSkia.h"
#include "MinikinUtils.h"
#include "Paint.h"
#include "minikin/LineBreaker.h"
namespace android {
struct JLineBreaksID {
jfieldID breaks;
jfieldID widths;
jfieldID flags;
static jclass gLineBreaks_class;
static JLineBreaksID gLineBreaks_fieldID;
// set text and set a number of parameters for creating a layout (width, tabstops, strategy,
// hyphenFrequency)
static void nSetupParagraph(JNIEnv* env, jclass, jlong nativePtr, jcharArray text, jint length,
jfloat firstWidth, jint firstWidthLineLimit, jfloat restWidth,
jintArray variableTabStops, jint defaultTabStop, jint strategy, jint hyphenFrequency) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
env->GetCharArrayRegion(text, 0, length, b->buffer());
b->setLineWidths(firstWidth, firstWidthLineLimit, restWidth);
if (variableTabStops == nullptr) {
b->setTabStops(nullptr, 0, defaultTabStop);
} else {
ScopedIntArrayRO stops(env, variableTabStops);
b->setTabStops(stops.get(), stops.size(), defaultTabStop);
static void recycleCopy(JNIEnv* env, jobject recycle, jintArray recycleBreaks,
jfloatArray recycleWidths, jintArray recycleFlags,
jint recycleLength, size_t nBreaks, const jint* breaks,
const jfloat* widths, const jint* flags) {
if ((size_t)recycleLength < nBreaks) {
// have to reallocate buffers
recycleBreaks = env->NewIntArray(nBreaks);
recycleWidths = env->NewFloatArray(nBreaks);
recycleFlags = env->NewIntArray(nBreaks);
env->SetObjectField(recycle, gLineBreaks_fieldID.breaks, recycleBreaks);
env->SetObjectField(recycle, gLineBreaks_fieldID.widths, recycleWidths);
env->SetObjectField(recycle, gLineBreaks_fieldID.flags, recycleFlags);
// copy data
env->SetIntArrayRegion(recycleBreaks, 0, nBreaks, breaks);
env->SetFloatArrayRegion(recycleWidths, 0, nBreaks, widths);
env->SetIntArrayRegion(recycleFlags, 0, nBreaks, flags);
static jint nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr,
jobject recycle, jintArray recycleBreaks,
jfloatArray recycleWidths, jintArray recycleFlags,
jint recycleLength) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
size_t nBreaks = b->computeBreaks();
recycleCopy(env, recycle, recycleBreaks, recycleWidths, recycleFlags, recycleLength,
nBreaks, b->getBreaks(), b->getWidths(), b->getFlags());
return static_cast<jint>(nBreaks);
static jlong nNewBuilder(JNIEnv*, jclass) {
return reinterpret_cast<jlong>(new LineBreaker);
static void nFreeBuilder(JNIEnv*, jclass, jlong nativePtr) {
delete reinterpret_cast<LineBreaker*>(nativePtr);
static void nFinishBuilder(JNIEnv*, jclass, jlong nativePtr) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
static jlong nLoadHyphenator(JNIEnv* env, jclass, jstring patternData) {
ScopedStringChars str(env, patternData);
Hyphenator* hyphenator = Hyphenator::load(str.get(), str.size());
return reinterpret_cast<jlong>(hyphenator);
static void nSetLocale(JNIEnv* env, jclass, jlong nativePtr, jstring javaLocaleName,
jlong nativeHyphenator) {
ScopedIcuLocale icuLocale(env, javaLocaleName);
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
Hyphenator* hyphenator = reinterpret_cast<Hyphenator*>(nativeHyphenator);
if (icuLocale.valid()) {
b->setLocale(icuLocale.locale(), hyphenator);
static void nSetIndents(JNIEnv* env, jclass, jlong nativePtr, jintArray indents) {
ScopedIntArrayRO indentArr(env, indents);
std::vector<float> indentVec(indentArr.get(), indentArr.get() + indentArr.size());
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
// Basically similar to Paint.getTextRunAdvances but with C++ interface
static jfloat nAddStyleRun(JNIEnv* env, jclass, jlong nativePtr,
jlong nativePaint, jlong nativeTypeface, jint start, jint end, jboolean isRtl) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
Paint* paint = reinterpret_cast<Paint*>(nativePaint);
TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(nativeTypeface);
FontCollection *font;
MinikinPaint minikinPaint;
FontStyle style = MinikinUtils::prepareMinikinPaint(&minikinPaint, &font, paint, typeface);
return b->addStyleRun(&minikinPaint, font, style, start, end, isRtl);
// Accept width measurements for the run, passed in from Java
static void nAddMeasuredRun(JNIEnv* env, jclass, jlong nativePtr,
jint start, jint end, jfloatArray widths) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
env->GetFloatArrayRegion(widths, start, end - start, b->charWidths() + start);
b->addStyleRun(nullptr, nullptr, FontStyle{}, start, end, false);
static void nAddReplacementRun(JNIEnv* env, jclass, jlong nativePtr,
jint start, jint end, jfloat width) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
b->addReplacement(start, end, width);
static void nGetWidths(JNIEnv* env, jclass, jlong nativePtr, jfloatArray widths) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
env->SetFloatArrayRegion(widths, 0, b->size(), b->charWidths());
static JNINativeMethod gMethods[] = {
// TODO performance: many of these are candidates for fast jni, awaiting guidance
{"nNewBuilder", "()J", (void*) nNewBuilder},
{"nFreeBuilder", "(J)V", (void*) nFreeBuilder},
{"nFinishBuilder", "(J)V", (void*) nFinishBuilder},
{"nLoadHyphenator", "(Ljava/lang/String;)J", (void*) nLoadHyphenator},
{"nSetLocale", "(JLjava/lang/String;J)V", (void*) nSetLocale},
{"nSetupParagraph", "(J[CIFIF[IIII)V", (void*) nSetupParagraph},
{"nSetIndents", "(J[I)V", (void*) nSetIndents},
{"nAddStyleRun", "(JJJIIZ)F", (void*) nAddStyleRun},
{"nAddMeasuredRun", "(JII[F)V", (void*) nAddMeasuredRun},
{"nAddReplacementRun", "(JIIF)V", (void*) nAddReplacementRun},
{"nGetWidths", "(J[F)V", (void*) nGetWidths},
{"nComputeLineBreaks", "(JLandroid/text/StaticLayout$LineBreaks;[I[F[II)I",
(void*) nComputeLineBreaks}
int register_android_text_StaticLayout(JNIEnv* env)
gLineBreaks_class = MakeGlobalRefOrDie(env,
FindClassOrDie(env, "android/text/StaticLayout$LineBreaks"));
gLineBreaks_fieldID.breaks = GetFieldIDOrDie(env, gLineBreaks_class, "breaks", "[I");
gLineBreaks_fieldID.widths = GetFieldIDOrDie(env, gLineBreaks_class, "widths", "[F");
gLineBreaks_fieldID.flags = GetFieldIDOrDie(env, gLineBreaks_class, "flags", "[I");
return RegisterMethodsOrDie(env, "android/text/StaticLayout", gMethods, NELEM(gMethods));