1 /* //device/libs/android_runtime/android_text_AndroidBidi.cpp
2 **
3 ** Copyright 2010, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #define LOG_TAG "AndroidUnicode"
19
20 #include <nativehelper/JNIHelp.h>
21 #include "core_jni_helpers.h"
22 #include "utils/misc.h"
23 #include "utils/Log.h"
24 #include "unicode/ubidi.h"
25 #include <minikin/Emoji.h>
26
27 namespace android {
28
runBidi(JNIEnv * env,jobject obj,jint dir,jcharArray chsArray,jbyteArray infoArray,jint n,jboolean haveInfo)29 static jint runBidi(JNIEnv* env, jobject obj, jint dir, jcharArray chsArray,
30 jbyteArray infoArray, jint n, jboolean haveInfo)
31 {
32 // Parameters are checked on java side
33 // Failures from GetXXXArrayElements indicate a serious out-of-memory condition
34 // that we don't bother to report, we're probably dead anyway.
35 jint result = 0;
36 jchar* chs = env->GetCharArrayElements(chsArray, NULL);
37 if (chs != NULL) {
38 jbyte* info = env->GetByteArrayElements(infoArray, NULL);
39 if (info != NULL) {
40 UErrorCode status = U_ZERO_ERROR;
41 UBiDi* bidi = ubidi_openSized(n, 0, &status);
42 // Set callbacks to override bidi classes of new emoji
43 ubidi_setClassCallback(
44 bidi, minikin::emojiBidiOverride, nullptr, nullptr, nullptr, &status);
45 ubidi_setPara(bidi, reinterpret_cast<const UChar*>(chs), n, dir, NULL, &status);
46 if (U_SUCCESS(status)) {
47 for (int i = 0; i < n; ++i) {
48 info[i] = ubidi_getLevelAt(bidi, i);
49 }
50 result = ubidi_getParaLevel(bidi);
51 } else {
52 jniThrowException(env, "java/lang/RuntimeException", NULL);
53 }
54 ubidi_close(bidi);
55
56 env->ReleaseByteArrayElements(infoArray, info, 0);
57 }
58 env->ReleaseCharArrayElements(chsArray, chs, JNI_ABORT);
59 }
60 return result;
61 }
62
63 static const JNINativeMethod gMethods[] = {
64 { "runBidi", "(I[C[BIZ)I", (void*) runBidi }
65 };
66
register_android_text_AndroidBidi(JNIEnv * env)67 int register_android_text_AndroidBidi(JNIEnv* env)
68 {
69 return RegisterMethodsOrDie(env, "android/text/AndroidBidi", gMethods, NELEM(gMethods));
70 }
71
72 }
73