| /* |
| * Copyright (C) 2013 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 "InputQueue" |
| |
| #include <fcntl.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <android/input.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include <android_runtime/android_view_InputQueue.h> |
| #include <input/Input.h> |
| #include <utils/Looper.h> |
| #include <utils/TypeHelpers.h> |
| #include <ScopedLocalRef.h> |
| |
| #include "JNIHelp.h" |
| #include "android_os_MessageQueue.h" |
| #include "android_view_KeyEvent.h" |
| #include "android_view_MotionEvent.h" |
| |
| #include "core_jni_helpers.h" |
| |
| namespace android { |
| |
| static struct { |
| jmethodID finishInputEvent; |
| } gInputQueueClassInfo; |
| |
| enum { |
| MSG_FINISH_INPUT = 1, |
| }; |
| |
| InputQueue::InputQueue(jobject inputQueueObj, const sp<Looper>& looper, |
| int dispatchReadFd, int dispatchWriteFd) : |
| mDispatchReadFd(dispatchReadFd), mDispatchWriteFd(dispatchWriteFd), |
| mDispatchLooper(looper), mHandler(new WeakMessageHandler(this)) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| mInputQueueWeakGlobal = env->NewGlobalRef(inputQueueObj); |
| } |
| |
| InputQueue::~InputQueue() { |
| mDispatchLooper->removeMessages(mHandler); |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| env->DeleteGlobalRef(mInputQueueWeakGlobal); |
| close(mDispatchReadFd); |
| close(mDispatchWriteFd); |
| } |
| |
| void InputQueue::attachLooper(Looper* looper, int ident, |
| ALooper_callbackFunc callback, void* data) { |
| Mutex::Autolock _l(mLock); |
| for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| if (looper == mAppLoopers[i]) { |
| return; |
| } |
| } |
| mAppLoopers.push(looper); |
| looper->addFd(mDispatchReadFd, ident, ALOOPER_EVENT_INPUT, callback, data); |
| } |
| |
| void InputQueue::detachLooper() { |
| Mutex::Autolock _l(mLock); |
| detachLooperLocked(); |
| } |
| |
| void InputQueue::detachLooperLocked() { |
| for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| mAppLoopers[i]->removeFd(mDispatchReadFd); |
| } |
| mAppLoopers.clear(); |
| } |
| |
| bool InputQueue::hasEvents() { |
| Mutex::Autolock _l(mLock); |
| return mPendingEvents.size() > 0; |
| } |
| |
| status_t InputQueue::getEvent(InputEvent** outEvent) { |
| Mutex::Autolock _l(mLock); |
| *outEvent = NULL; |
| if (!mPendingEvents.isEmpty()) { |
| *outEvent = mPendingEvents[0]; |
| mPendingEvents.removeAt(0); |
| } |
| |
| if (mPendingEvents.isEmpty()) { |
| char byteread[16]; |
| ssize_t nRead; |
| do { |
| nRead = TEMP_FAILURE_RETRY(read(mDispatchReadFd, &byteread, sizeof(byteread))); |
| if (nRead < 0 && errno != EAGAIN) { |
| ALOGW("Failed to read from native dispatch pipe: %s", strerror(errno)); |
| } |
| } while (nRead > 0); |
| } |
| |
| return *outEvent != NULL ? OK : WOULD_BLOCK; |
| } |
| |
| bool InputQueue::preDispatchEvent(InputEvent* e) { |
| if (e->getType() == AINPUT_EVENT_TYPE_KEY) { |
| KeyEvent* keyEvent = static_cast<KeyEvent*>(e); |
| if (keyEvent->getFlags() & AKEY_EVENT_FLAG_PREDISPATCH) { |
| finishEvent(e, false); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void InputQueue::finishEvent(InputEvent* event, bool handled) { |
| Mutex::Autolock _l(mLock); |
| mFinishedEvents.push(key_value_pair_t<InputEvent*, bool>(event, handled)); |
| if (mFinishedEvents.size() == 1) { |
| mDispatchLooper->sendMessage(this, Message(MSG_FINISH_INPUT)); |
| } |
| } |
| |
| void InputQueue::handleMessage(const Message& message) { |
| switch(message.what) { |
| case MSG_FINISH_INPUT: |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| ScopedLocalRef<jobject> inputQueueObj(env, jniGetReferent(env, mInputQueueWeakGlobal)); |
| if (!inputQueueObj.get()) { |
| ALOGW("InputQueue was finalized without being disposed"); |
| return; |
| } |
| while (true) { |
| InputEvent* event; |
| bool handled; |
| { |
| Mutex::Autolock _l(mLock); |
| if (mFinishedEvents.isEmpty()) { |
| break; |
| } |
| event = mFinishedEvents[0].getKey(); |
| handled = mFinishedEvents[0].getValue(); |
| mFinishedEvents.removeAt(0); |
| } |
| env->CallVoidMethod(inputQueueObj.get(), gInputQueueClassInfo.finishInputEvent, |
| reinterpret_cast<jlong>(event), handled); |
| recycleInputEvent(event); |
| } |
| break; |
| } |
| } |
| |
| void InputQueue::recycleInputEvent(InputEvent* event) { |
| mPooledInputEventFactory.recycle(event); |
| } |
| |
| KeyEvent* InputQueue::createKeyEvent() { |
| return mPooledInputEventFactory.createKeyEvent(); |
| } |
| |
| MotionEvent* InputQueue::createMotionEvent() { |
| return mPooledInputEventFactory.createMotionEvent(); |
| } |
| |
| void InputQueue::enqueueEvent(InputEvent* event) { |
| Mutex::Autolock _l(mLock); |
| mPendingEvents.push(event); |
| if (mPendingEvents.size() == 1) { |
| char dummy = 0; |
| int res = TEMP_FAILURE_RETRY(write(mDispatchWriteFd, &dummy, sizeof(dummy))); |
| if (res < 0 && errno != EAGAIN) { |
| ALOGW("Failed writing to dispatch fd: %s", strerror(errno)); |
| } |
| } |
| } |
| |
| InputQueue* InputQueue::createQueue(jobject inputQueueObj, const sp<Looper>& looper) { |
| int pipeFds[2]; |
| if (pipe(pipeFds)) { |
| ALOGW("Could not create native input dispatching pipe: %s", strerror(errno)); |
| return NULL; |
| } |
| fcntl(pipeFds[0], F_SETFL, O_NONBLOCK); |
| fcntl(pipeFds[1], F_SETFL, O_NONBLOCK); |
| return new InputQueue(inputQueueObj, looper, pipeFds[0], pipeFds[1]); |
| } |
| |
| static jlong nativeInit(JNIEnv* env, jobject clazz, jobject queueWeak, jobject jMsgQueue) { |
| sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, jMsgQueue); |
| if (messageQueue == NULL) { |
| jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| return 0; |
| } |
| sp<InputQueue> queue = InputQueue::createQueue(queueWeak, messageQueue->getLooper()); |
| if (!queue.get()) { |
| jniThrowRuntimeException(env, "InputQueue failed to initialize"); |
| return 0; |
| } |
| queue->incStrong(&gInputQueueClassInfo); |
| return reinterpret_cast<jlong>(queue.get()); |
| } |
| |
| static void nativeDispose(JNIEnv* env, jobject clazz, jlong ptr) { |
| sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| queue->detachLooper(); |
| queue->decStrong(&gInputQueueClassInfo); |
| } |
| |
| static jlong nativeSendKeyEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj, |
| jboolean predispatch) { |
| InputQueue* queue = reinterpret_cast<InputQueue*>(ptr); |
| KeyEvent* event = queue->createKeyEvent(); |
| status_t status = android_view_KeyEvent_toNative(env, eventObj, event); |
| if (status) { |
| queue->recycleInputEvent(event); |
| jniThrowRuntimeException(env, "Could not read contents of KeyEvent object."); |
| return -1; |
| } |
| |
| if (predispatch) { |
| event->setFlags(event->getFlags() | AKEY_EVENT_FLAG_PREDISPATCH); |
| } |
| |
| queue->enqueueEvent(event); |
| return reinterpret_cast<jlong>(event); |
| } |
| |
| static jlong nativeSendMotionEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj) { |
| sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| MotionEvent* originalEvent = android_view_MotionEvent_getNativePtr(env, eventObj); |
| if (!originalEvent) { |
| jniThrowRuntimeException(env, "Could not obtain MotionEvent pointer."); |
| return -1; |
| } |
| MotionEvent* event = queue->createMotionEvent(); |
| event->copyFrom(originalEvent, true /* keepHistory */); |
| queue->enqueueEvent(event); |
| return reinterpret_cast<jlong>(event); |
| } |
| |
| static const JNINativeMethod g_methods[] = { |
| { "nativeInit", "(Ljava/lang/ref/WeakReference;Landroid/os/MessageQueue;)J", |
| (void*) nativeInit }, |
| { "nativeDispose", "(J)V", (void*) nativeDispose }, |
| { "nativeSendKeyEvent", "(JLandroid/view/KeyEvent;Z)J", (void*) nativeSendKeyEvent }, |
| { "nativeSendMotionEvent", "(JLandroid/view/MotionEvent;)J", (void*) nativeSendMotionEvent }, |
| }; |
| |
| static const char* const kInputQueuePathName = "android/view/InputQueue"; |
| |
| int register_android_view_InputQueue(JNIEnv* env) |
| { |
| jclass clazz = FindClassOrDie(env, kInputQueuePathName); |
| gInputQueueClassInfo.finishInputEvent = GetMethodIDOrDie(env, clazz, "finishInputEvent", |
| "(JZ)V"); |
| |
| return RegisterMethodsOrDie(env, kInputQueuePathName, g_methods, NELEM(g_methods)); |
| } |
| |
| } // namespace android |