Add support for accessing native bidi implementation via jni. (dae8e94c) · Commits · e / os / android_frameworks_base

core/java/android/text/AndroidBidi.java

0 → 100644

+48 −0

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		/*
		* Copyright (C) 2010 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.
		*/

		package android.text;

		/**
		* Access the ICU bidi implementation.
		* @hide
		*/
		/* package */ class AndroidBidi {

		public static int bidi(int dir, char[] chs, byte[] chInfo, int n, boolean haveInfo) {
		if (chs == null \|\| chInfo == null) {
		throw new NullPointerException();
		}

		if (n < 0 \|\| chs.length < n \|\| chInfo.length < n) {
		throw new IndexOutOfBoundsException();
		}

		switch(dir) {
		case Layout.DIR_REQUEST_LTR: dir = 0; break;
		case Layout.DIR_REQUEST_RTL: dir = 1; break;
		case Layout.DIR_REQUEST_DEFAULT_LTR: dir = -2; break;
		case Layout.DIR_REQUEST_DEFAULT_RTL: dir = -1; break;
		default: dir = 0; break;
		}

		int result = runBidi(dir, chs, chInfo, n, haveInfo);
		result = (result & 0x1) == 0 ? Layout.DIR_LEFT_TO_RIGHT : Layout.DIR_RIGHT_TO_LEFT;
		return result;
		}

		private native static int runBidi(int dir, char[] chs, byte[] chInfo, int n, boolean haveInfo);
		}
		No newline at end of file

core/jni/Android.mk

+1 −0

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		@@ -45,6 +45,7 @@ LOCAL_SRC_FILES:= \
		android_view_Surface.cpp \
		android_view_ViewRoot.cpp \
		android_text_AndroidCharacter.cpp \
		android_text_AndroidBidi.cpp \
		android_text_KeyCharacterMap.cpp \
		android_os_Debug.cpp \
		android_os_FileUtils.cpp \

core/jni/AndroidRuntime.cpp

+2 −0

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		@@ -142,6 +142,7 @@ extern int register_android_net_NetworkUtils(JNIEnv* env);
		extern int register_android_net_wifi_WifiManager(JNIEnv* env);
		extern int register_android_security_Md5MessageDigest(JNIEnv *env);
		extern int register_android_text_AndroidCharacter(JNIEnv *env);
		extern int register_android_text_AndroidBidi(JNIEnv *env);
		extern int register_android_text_KeyCharacterMap(JNIEnv *env);
		extern int register_android_opengl_classes(JNIEnv *env);
		extern int register_android_bluetooth_HeadsetBase(JNIEnv* env);
		@@ -1184,6 +1185,7 @@ static const RegJNIRec gRegJNI[] = {
		REG_JNI(register_android_emoji_EmojiFactory),
		REG_JNI(register_android_security_Md5MessageDigest),
		REG_JNI(register_android_text_AndroidCharacter),
		REG_JNI(register_android_text_AndroidBidi),
		REG_JNI(register_android_text_KeyCharacterMap),
		REG_JNI(register_android_os_Process),
		REG_JNI(register_android_os_Binder),

core/jni/android_text_AndroidBidi.cpp

0 → 100644

+81 −0

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		/* //device/libs/android_runtime/android_text_AndroidBidi.cpp
		**
		** Copyright 2010, 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 "AndroidUnicode"

		#include <jni.h>
		#include <android_runtime/AndroidRuntime.h>
		#include "utils/misc.h"
		#include "utils/Log.h"
		#include "unicode/ubidi.h"

		namespace android {

		static void jniThrowException(JNIEnv* env, const char* exc, const char* msg = NULL)
		{
		jclass excClazz = env->FindClass(exc);
		LOG_ASSERT(excClazz, "Unable to find class %s", exc);

		env->ThrowNew(excClazz, msg);
		}

		static jint runBidi(JNIEnv* env, jobject obj, jint dir, jcharArray chsArray,
		jbyteArray infoArray, int n, jboolean haveInfo)
		{
		// Parameters are checked on java side
		// Failures from GetXXXArrayElements indicate a serious out-of-memory condition
		// that we don't bother to report, we're probably dead anyway.
		jint result = 0;
		jchar* chs = env->GetCharArrayElements(chsArray, NULL);
		if (chs != NULL) {
		jbyte* info = env->GetByteArrayElements(infoArray, NULL);
		if (info != NULL) {
		UErrorCode status = U_ZERO_ERROR;
		UBiDi* bidi = ubidi_openSized(n, 0, &status);
		ubidi_setPara(bidi, chs, n, dir, NULL, &status);
		if (U_SUCCESS(status)) {
		for (int i = 0; i < n; ++i) {
		info[i] = ubidi_getLevelAt(bidi, i);
		}
		result = ubidi_getParaLevel(bidi);
		} else {
		jniThrowException(env, "java/lang/RuntimeException", NULL);
		}
		ubidi_close(bidi);

		env->ReleaseByteArrayElements(infoArray, info, 0);
		}
		env->ReleaseCharArrayElements(chsArray, chs, JNI_ABORT);
		}
		return result;
		}

		static JNINativeMethod gMethods[] = {
		{ "runBidi", "(I[C[BIZ)I",
		(void*) runBidi }
		};

		int register_android_text_AndroidBidi(JNIEnv* env)
		{
		jclass clazz = env->FindClass("android/text/AndroidBidi");
		LOG_ASSERT(clazz, "Cannot find android/text/AndroidBidi");

		return AndroidRuntime::registerNativeMethods(env, "android/text/AndroidBidi",
		gMethods, NELEM(gMethods));
		}

		}

core/tests/coretests/src/android/text/StaticLayoutBidiTest.java

+32 −1

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		@@ -88,7 +88,38 @@ public class StaticLayoutBidiTest extends TestCase {
		int resultDir = StaticLayout.bidi(dir, chs, chInfo, n, false);

		{
		StringBuilder sb = new StringBuilder("xdirs:");
		StringBuilder sb = new StringBuilder("info:");
		for (int i = 0; i < n; ++i) {
		sb.append(" ").append(String.valueOf(chInfo[i]));
		}
		Log.i("BIDI", sb.toString());
		}

		char[] resultLevelChars = new char[n];
		for (int i = 0; i < n; ++i) {
		resultLevelChars[i] = (char)('0' + chInfo[i]);
		}
		String resultLevels = new String(resultLevelChars);
		assertEquals("direction", expectedDir, resultDir);
		assertEquals("levels", expectedLevels, resultLevels);
		}

		@SmallTest
		public void testNativeBidi() {
		// native bidi returns levels, not simply directions
		expectNativeBidi(REQ_DL, ALEF + BET + GIMEL + " abc", "1111222", R);
		}

		private void expectNativeBidi(int dir, String text,
		String expectedLevels, int expectedDir) {
		char[] chs = text.toCharArray();
		int n = chs.length;
		byte[] chInfo = new byte[n];

		int resultDir = AndroidBidi.bidi(dir, chs, chInfo, n, false);

		{
		StringBuilder sb = new StringBuilder("info:");
		for (int i = 0; i < n; ++i) {
		sb.append(" ").append(String.valueOf(chInfo[i]));
		}