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/*
* 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
*
* 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.
*/
#define LOG_TAG "LineBreaker"
#include "utils/misc.h"
#include "utils/Log.h"
#include <nativehelper/ScopedStringChars.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <nativehelper/JNIHelp.h>
#include "core_jni_helpers.h"
#include "scoped_nullable_primitive_array.h"
#include <cstdint>
#include <vector>
#include <list>
#include <algorithm>
#include "SkPaint.h"
#include "SkTypeface.h"
#include <hwui/MinikinSkia.h>
#include <hwui/MinikinUtils.h>
#include <hwui/Paint.h>
#include <minikin/FontCollection.h>
#include <minikin/AndroidLineBreakerHelper.h>
#include <minikin/MinikinFont.h>
namespace android {
static inline std::vector<float> jintArrayToFloatVector(JNIEnv* env, jintArray javaArray) {
if (javaArray == nullptr) {
return std::vector<float>();
} else {
ScopedIntArrayRO intArr(env, javaArray);
return std::vector<float>(intArr.get(), intArr.get() + intArr.size());
}
}
static inline minikin::android::StaticLayoutNative* toNative(jlong ptr) {
return reinterpret_cast<minikin::android::StaticLayoutNative*>(ptr);
}
// set text and set a number of parameters for creating a layout (width, tabstops, strategy,
// hyphenFrequency)
static jlong nInit(JNIEnv* env, jclass /* unused */,
jint breakStrategy, jint hyphenationFrequency, jboolean isJustified, jintArray indents) {
return reinterpret_cast<jlong>(new minikin::android::StaticLayoutNative(
static_cast<minikin::BreakStrategy>(breakStrategy),
static_cast<minikin::HyphenationFrequency>(hyphenationFrequency),
isJustified,
jintArrayToFloatVector(env, indents)));
}
static void nFinish(jlong nativePtr) {
delete toNative(nativePtr);
}
// CriticalNative
static jlong nGetReleaseFunc() {
return reinterpret_cast<jlong>(nFinish);
}
static jlong nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr,
// Inputs
jcharArray javaText,
jlong measuredTextPtr,
jint length,
jfloat firstWidth,
jint firstWidthLineCount,
jfloat restWidth,
jfloatArray variableTabStops,
jfloat defaultTabStop,
jint indentsOffset) {
minikin::android::StaticLayoutNative* builder = toNative(nativePtr);
ScopedCharArrayRO text(env, javaText);
ScopedNullableFloatArrayRO tabStops(env, variableTabStops);
minikin::U16StringPiece u16Text(text.get(), length);
minikin::MeasuredText* measuredText = reinterpret_cast<minikin::MeasuredText*>(measuredTextPtr);
std::unique_ptr<minikin::LineBreakResult> result =
std::make_unique<minikin::LineBreakResult>(builder->computeBreaks(
u16Text, *measuredText, firstWidth, firstWidthLineCount, restWidth, indentsOffset,
tabStops.get(), tabStops.size(), defaultTabStop));
return reinterpret_cast<jlong>(result.release());
}
static jint nGetLineCount(jlong ptr) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->breakPoints.size();
}
static jint nGetLineBreakOffset(jlong ptr, jint i) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->breakPoints[i];
}
static jfloat nGetLineWidth(jlong ptr, jint i) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->widths[i];
}
static jfloat nGetLineAscent(jlong ptr, jint i) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->ascents[i];
}
static jfloat nGetLineDescent(jlong ptr, jint i) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->descents[i];
}
static jint nGetLineFlag(jlong ptr, jint i) {
return reinterpret_cast<minikin::LineBreakResult*>(ptr)->flags[i];
}
static void nReleaseResult(jlong ptr) {
delete reinterpret_cast<minikin::LineBreakResult*>(ptr);
}
static jlong nGetReleaseResultFunc() {
return reinterpret_cast<jlong>(nReleaseResult);
}
static const JNINativeMethod gMethods[] = {
// Fast Natives
{"nInit", "("
"I" // breakStrategy
"I" // hyphenationFrequency
"Z" // isJustified
"[I" // indents
")J", (void*) nInit},
// Critical Natives
{"nGetReleaseFunc", "()J", (void*) nGetReleaseFunc},
// Regular JNI
{"nComputeLineBreaks", "("
"J" // nativePtr
"[C" // text
"J" // MeasuredParagraph ptr.
"I" // length
"F" // firstWidth
"I" // firstWidthLineCount
"F" // restWidth
"[F" // variableTabStops
"F" // defaultTabStop
"I" // indentsOffset
")J", (void*) nComputeLineBreaks},
// Result accessors, CriticalNatives
{"nGetLineCount", "(J)I", (void*)nGetLineCount},
{"nGetLineBreakOffset", "(JI)I", (void*)nGetLineBreakOffset},
{"nGetLineWidth", "(JI)F", (void*)nGetLineWidth},
{"nGetLineAscent", "(JI)F", (void*)nGetLineAscent},
{"nGetLineDescent", "(JI)F", (void*)nGetLineDescent},
{"nGetLineFlag", "(JI)I", (void*)nGetLineFlag},
{"nGetReleaseResultFunc", "()J", (void*)nGetReleaseResultFunc},
};
int register_android_graphics_text_LineBreaker(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/graphics/text/LineBreaker", gMethods,
NELEM(gMethods));
}
}
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