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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 "StaticLayout"
#include "ScopedIcuLocale.h"
#include "unicode/locid.h"
#include "unicode/brkiter.h"
#include "utils/misc.h"
#include "utils/Log.h"
#include "ScopedPrimitiveArray.h"
#include "JNIHelp.h"
#include <android_runtime/AndroidRuntime.h>
#include <vector>
namespace android {
class ScopedBreakIterator {
public:
ScopedBreakIterator(JNIEnv* env, BreakIterator* breakIterator, jcharArray inputText,
jint length) : mBreakIterator(breakIterator), mChars(env, inputText) {
UErrorCode status = U_ZERO_ERROR;
mUText = utext_openUChars(NULL, mChars.get(), length, &status);
if (mUText == NULL) {
return;
}
mBreakIterator->setText(mUText, status);
}
inline BreakIterator* operator->() {
return mBreakIterator;
}
~ScopedBreakIterator() {
utext_close(mUText);
delete mBreakIterator;
}
private:
BreakIterator* mBreakIterator;
ScopedCharArrayRO mChars;
UText* mUText;
// disable copying and assignment
ScopedBreakIterator(const ScopedBreakIterator&);
void operator=(const ScopedBreakIterator&);
};
static jintArray nLineBreakOpportunities(JNIEnv* env, jclass, jstring javaLocaleName,
jcharArray inputText, jint length,
jintArray recycle) {
jintArray ret;
std::vector<jint> breaks;
ScopedIcuLocale icuLocale(env, javaLocaleName);
if (icuLocale.valid()) {
UErrorCode status = U_ZERO_ERROR;
BreakIterator* it = BreakIterator::createLineInstance(icuLocale.locale(), status);
if (!U_SUCCESS(status) || it == NULL) {
if (it) {
delete it;
}
} else {
ScopedBreakIterator breakIterator(env, it, inputText, length);
for (int loc = breakIterator->first(); loc != BreakIterator::DONE;
loc = breakIterator->next()) {
breaks.push_back(loc);
}
}
}
breaks.push_back(-1); // sentinel terminal value
if (recycle != NULL && static_cast<size_t>(env->GetArrayLength(recycle)) >= breaks.size()) {
ret = recycle;
} else {
ret = env->NewIntArray(breaks.size());
}
if (ret != NULL) {
env->SetIntArrayRegion(ret, 0, breaks.size(), &breaks.front());
}
return ret;
}
static JNINativeMethod gMethods[] = {
{"nLineBreakOpportunities", "(Ljava/lang/String;[CI[I)[I", (void*) nLineBreakOpportunities}
};
int register_android_text_StaticLayout(JNIEnv* env)
{
return AndroidRuntime::registerNativeMethods(env, "android/text/StaticLayout",
gMethods, NELEM(gMethods));
}
}
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