| /* |
| * 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)); |
| } |
| |
| } |