| /* |
| * 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. |
| */ |
| |
| #define LOG_TAG "KeyEvent-JNI" |
| |
| #include <nativehelper/JNIHelp.h> |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include <android_runtime/Log.h> |
| #include <input/Input.h> |
| #include <nativehelper/ScopedPrimitiveArray.h> |
| #include <nativehelper/ScopedUtfChars.h> |
| #include <utils/Log.h> |
| #include <optional> |
| #include "android_view_KeyEvent.h" |
| |
| #include "core_jni_helpers.h" |
| |
| namespace android { |
| |
| /** |
| * Convert an std::array of bytes into a Java object. |
| */ |
| template <size_t N> |
| static ScopedLocalRef<jbyteArray> toJbyteArray(JNIEnv* env, const std::array<uint8_t, N>& data) { |
| ScopedLocalRef<jbyteArray> array(env, env->NewByteArray(N)); |
| if (array.get() == nullptr) { |
| jniThrowException(env, "java/lang/OutOfMemoryError", nullptr); |
| return array; |
| } |
| static_assert(sizeof(char) == sizeof(uint8_t)); |
| env->SetByteArrayRegion(array.get(), 0, N, reinterpret_cast<const signed char*>(data.data())); |
| return array; |
| } |
| |
| /** |
| * Convert a Java object into an std::array of bytes of size N. |
| * If the object is null, or the length is unexpected, return std::nullopt. |
| */ |
| template <size_t N> |
| static std::optional<std::array<uint8_t, N>> fromJobject(JNIEnv* env, jobject object) { |
| if (object == nullptr) { |
| return std::nullopt; |
| } |
| jbyteArray javaArray = reinterpret_cast<jbyteArray>(object); |
| ScopedByteArrayRO bytes(env, javaArray); |
| if (bytes.size() != N) { |
| ALOGE("Could not initialize array from java object, expected length %zu but got %zu", N, |
| bytes.size()); |
| return std::nullopt; |
| } |
| std::array<uint8_t, N> array; |
| std::move(bytes.get(), bytes.get() + N, array.begin()); |
| return array; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| static struct { |
| jclass clazz; |
| |
| jmethodID obtain; |
| jmethodID recycle; |
| |
| jfieldID mDeviceId; |
| jfieldID mSource; |
| jfieldID mDisplayId; |
| jfieldID mHmac; |
| jfieldID mMetaState; |
| jfieldID mAction; |
| jfieldID mKeyCode; |
| jfieldID mScanCode; |
| jfieldID mRepeatCount; |
| jfieldID mFlags; |
| jfieldID mDownTime; |
| jfieldID mEventTime; |
| jfieldID mCharacters; |
| } gKeyEventClassInfo; |
| |
| // ---------------------------------------------------------------------------- |
| |
| jobject android_view_KeyEvent_fromNative(JNIEnv* env, const KeyEvent* event) { |
| ScopedLocalRef<jbyteArray> hmac = toJbyteArray(env, event->getHmac()); |
| jobject eventObj = |
| env->CallStaticObjectMethod(gKeyEventClassInfo.clazz, gKeyEventClassInfo.obtain, |
| nanoseconds_to_milliseconds(event->getDownTime()), |
| nanoseconds_to_milliseconds(event->getEventTime()), |
| event->getAction(), event->getKeyCode(), |
| event->getRepeatCount(), event->getMetaState(), |
| event->getDeviceId(), event->getScanCode(), |
| event->getFlags(), event->getSource(), |
| event->getDisplayId(), hmac.get(), NULL); |
| if (env->ExceptionCheck()) { |
| ALOGE("An exception occurred while obtaining a key event."); |
| LOGE_EX(env); |
| env->ExceptionClear(); |
| return NULL; |
| } |
| return eventObj; |
| } |
| |
| status_t android_view_KeyEvent_toNative(JNIEnv* env, jobject eventObj, |
| KeyEvent* event) { |
| jint deviceId = env->GetIntField(eventObj, gKeyEventClassInfo.mDeviceId); |
| jint source = env->GetIntField(eventObj, gKeyEventClassInfo.mSource); |
| jint displayId = env->GetIntField(eventObj, gKeyEventClassInfo.mDisplayId); |
| jobject hmacObj = env->GetObjectField(eventObj, gKeyEventClassInfo.mHmac); |
| std::optional<std::array<uint8_t, 32>> hmac = fromJobject<32>(env, hmacObj); |
| if (!hmac) { |
| hmac = INVALID_HMAC; |
| } |
| jint metaState = env->GetIntField(eventObj, gKeyEventClassInfo.mMetaState); |
| jint action = env->GetIntField(eventObj, gKeyEventClassInfo.mAction); |
| jint keyCode = env->GetIntField(eventObj, gKeyEventClassInfo.mKeyCode); |
| jint scanCode = env->GetIntField(eventObj, gKeyEventClassInfo.mScanCode); |
| jint repeatCount = env->GetIntField(eventObj, gKeyEventClassInfo.mRepeatCount); |
| jint flags = env->GetIntField(eventObj, gKeyEventClassInfo.mFlags); |
| jlong downTime = env->GetLongField(eventObj, gKeyEventClassInfo.mDownTime); |
| jlong eventTime = env->GetLongField(eventObj, gKeyEventClassInfo.mEventTime); |
| |
| event->initialize(deviceId, source, displayId, *hmac, action, flags, keyCode, scanCode, |
| metaState, repeatCount, milliseconds_to_nanoseconds(downTime), |
| milliseconds_to_nanoseconds(eventTime)); |
| return OK; |
| } |
| |
| status_t android_view_KeyEvent_recycle(JNIEnv* env, jobject eventObj) { |
| env->CallVoidMethod(eventObj, gKeyEventClassInfo.recycle); |
| if (env->ExceptionCheck()) { |
| ALOGW("An exception occurred while recycling a key event."); |
| LOGW_EX(env); |
| env->ExceptionClear(); |
| return UNKNOWN_ERROR; |
| } |
| return OK; |
| } |
| |
| static jstring android_view_KeyEvent_nativeKeyCodeToString(JNIEnv* env, jobject clazz, |
| jint keyCode) { |
| return env->NewStringUTF(KeyEvent::getLabel(keyCode)); |
| } |
| |
| static jint android_view_KeyEvent_nativeKeyCodeFromString(JNIEnv* env, jobject clazz, |
| jstring label) { |
| ScopedUtfChars keyLabel(env, label); |
| return KeyEvent::getKeyCodeFromLabel(keyLabel.c_str()); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| static const JNINativeMethod g_methods[] = { |
| { "nativeKeyCodeToString", "(I)Ljava/lang/String;", |
| (void*)android_view_KeyEvent_nativeKeyCodeToString}, |
| { "nativeKeyCodeFromString", "(Ljava/lang/String;)I", |
| (void*)android_view_KeyEvent_nativeKeyCodeFromString}, |
| }; |
| |
| int register_android_view_KeyEvent(JNIEnv* env) { |
| jclass clazz = FindClassOrDie(env, "android/view/KeyEvent"); |
| gKeyEventClassInfo.clazz = MakeGlobalRefOrDie(env, clazz); |
| |
| gKeyEventClassInfo.obtain = |
| GetStaticMethodIDOrDie(env, gKeyEventClassInfo.clazz, "obtain", |
| "(JJIIIIIIIII[BLjava/lang/String;)Landroid/view/KeyEvent;"); |
| gKeyEventClassInfo.recycle = GetMethodIDOrDie(env, gKeyEventClassInfo.clazz, |
| "recycle", "()V"); |
| |
| gKeyEventClassInfo.mDeviceId = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mDeviceId", "I"); |
| gKeyEventClassInfo.mSource = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mSource", "I"); |
| gKeyEventClassInfo.mDisplayId = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mDisplayId", |
| "I"); |
| gKeyEventClassInfo.mHmac = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mHmac", "[B"); |
| gKeyEventClassInfo.mMetaState = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mMetaState", |
| "I"); |
| gKeyEventClassInfo.mAction = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mAction", "I"); |
| gKeyEventClassInfo.mKeyCode = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mKeyCode", "I"); |
| gKeyEventClassInfo.mScanCode = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mScanCode", "I"); |
| gKeyEventClassInfo.mRepeatCount = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mRepeatCount", |
| "I"); |
| gKeyEventClassInfo.mFlags = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mFlags", "I"); |
| gKeyEventClassInfo.mDownTime = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mDownTime", "J"); |
| gKeyEventClassInfo.mEventTime = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mEventTime", |
| "J"); |
| gKeyEventClassInfo.mCharacters = GetFieldIDOrDie(env, gKeyEventClassInfo.clazz, "mCharacters", |
| "Ljava/lang/String;"); |
| |
| return RegisterMethodsOrDie(env, "android/view/KeyEvent", g_methods, NELEM(g_methods)); |
| } |
| |
| } // namespace android |