Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "InputQueue" |
| 18 | |
| 19 | #include <fcntl.h> |
| 20 | #include <string.h> |
| 21 | #include <unistd.h> |
| 22 | |
| 23 | #include <android/input.h> |
| 24 | #include <android_runtime/AndroidRuntime.h> |
| 25 | #include <android_runtime/android_view_InputQueue.h> |
Jeff Brown | 9d3b1a4 | 2013-07-01 19:07:15 -0700 | [diff] [blame] | 26 | #include <input/Input.h> |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 27 | #include <utils/Looper.h> |
| 28 | #include <utils/TypeHelpers.h> |
Steven Moreland | 2279b25 | 2017-07-19 09:50:45 -0700 | [diff] [blame] | 29 | #include <nativehelper/ScopedLocalRef.h> |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 30 | |
Steven Moreland | 2279b25 | 2017-07-19 09:50:45 -0700 | [diff] [blame] | 31 | #include <nativehelper/JNIHelp.h> |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 32 | #include "android_os_MessageQueue.h" |
| 33 | #include "android_view_KeyEvent.h" |
| 34 | #include "android_view_MotionEvent.h" |
| 35 | |
Andreas Gampe | 987f79f | 2014-11-18 17:29:46 -0800 | [diff] [blame] | 36 | #include "core_jni_helpers.h" |
| 37 | |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 38 | namespace android { |
| 39 | |
| 40 | static struct { |
| 41 | jmethodID finishInputEvent; |
| 42 | } gInputQueueClassInfo; |
| 43 | |
| 44 | enum { |
| 45 | MSG_FINISH_INPUT = 1, |
| 46 | }; |
| 47 | |
| 48 | InputQueue::InputQueue(jobject inputQueueObj, const sp<Looper>& looper, |
| 49 | int dispatchReadFd, int dispatchWriteFd) : |
| 50 | mDispatchReadFd(dispatchReadFd), mDispatchWriteFd(dispatchWriteFd), |
| 51 | mDispatchLooper(looper), mHandler(new WeakMessageHandler(this)) { |
| 52 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 53 | mInputQueueWeakGlobal = env->NewGlobalRef(inputQueueObj); |
| 54 | } |
| 55 | |
| 56 | InputQueue::~InputQueue() { |
| 57 | mDispatchLooper->removeMessages(mHandler); |
| 58 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 59 | env->DeleteGlobalRef(mInputQueueWeakGlobal); |
| 60 | close(mDispatchReadFd); |
| 61 | close(mDispatchWriteFd); |
| 62 | } |
| 63 | |
| 64 | void InputQueue::attachLooper(Looper* looper, int ident, |
| 65 | ALooper_callbackFunc callback, void* data) { |
| 66 | Mutex::Autolock _l(mLock); |
| 67 | for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| 68 | if (looper == mAppLoopers[i]) { |
| 69 | return; |
| 70 | } |
| 71 | } |
| 72 | mAppLoopers.push(looper); |
| 73 | looper->addFd(mDispatchReadFd, ident, ALOOPER_EVENT_INPUT, callback, data); |
| 74 | } |
| 75 | |
| 76 | void InputQueue::detachLooper() { |
| 77 | Mutex::Autolock _l(mLock); |
| 78 | detachLooperLocked(); |
| 79 | } |
| 80 | |
| 81 | void InputQueue::detachLooperLocked() { |
| 82 | for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| 83 | mAppLoopers[i]->removeFd(mDispatchReadFd); |
| 84 | } |
| 85 | mAppLoopers.clear(); |
| 86 | } |
| 87 | |
| 88 | bool InputQueue::hasEvents() { |
| 89 | Mutex::Autolock _l(mLock); |
| 90 | return mPendingEvents.size() > 0; |
| 91 | } |
| 92 | |
| 93 | status_t InputQueue::getEvent(InputEvent** outEvent) { |
| 94 | Mutex::Autolock _l(mLock); |
| 95 | *outEvent = NULL; |
| 96 | if (!mPendingEvents.isEmpty()) { |
| 97 | *outEvent = mPendingEvents[0]; |
| 98 | mPendingEvents.removeAt(0); |
| 99 | } |
| 100 | |
| 101 | if (mPendingEvents.isEmpty()) { |
| 102 | char byteread[16]; |
| 103 | ssize_t nRead; |
| 104 | do { |
| 105 | nRead = TEMP_FAILURE_RETRY(read(mDispatchReadFd, &byteread, sizeof(byteread))); |
| 106 | if (nRead < 0 && errno != EAGAIN) { |
| 107 | ALOGW("Failed to read from native dispatch pipe: %s", strerror(errno)); |
| 108 | } |
| 109 | } while (nRead > 0); |
| 110 | } |
| 111 | |
| 112 | return *outEvent != NULL ? OK : WOULD_BLOCK; |
| 113 | } |
| 114 | |
| 115 | bool InputQueue::preDispatchEvent(InputEvent* e) { |
| 116 | if (e->getType() == AINPUT_EVENT_TYPE_KEY) { |
| 117 | KeyEvent* keyEvent = static_cast<KeyEvent*>(e); |
| 118 | if (keyEvent->getFlags() & AKEY_EVENT_FLAG_PREDISPATCH) { |
| 119 | finishEvent(e, false); |
| 120 | return true; |
| 121 | } |
| 122 | } |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | void InputQueue::finishEvent(InputEvent* event, bool handled) { |
| 127 | Mutex::Autolock _l(mLock); |
| 128 | mFinishedEvents.push(key_value_pair_t<InputEvent*, bool>(event, handled)); |
| 129 | if (mFinishedEvents.size() == 1) { |
| 130 | mDispatchLooper->sendMessage(this, Message(MSG_FINISH_INPUT)); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | void InputQueue::handleMessage(const Message& message) { |
| 135 | switch(message.what) { |
| 136 | case MSG_FINISH_INPUT: |
| 137 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 138 | ScopedLocalRef<jobject> inputQueueObj(env, jniGetReferent(env, mInputQueueWeakGlobal)); |
| 139 | if (!inputQueueObj.get()) { |
| 140 | ALOGW("InputQueue was finalized without being disposed"); |
| 141 | return; |
| 142 | } |
| 143 | while (true) { |
| 144 | InputEvent* event; |
| 145 | bool handled; |
| 146 | { |
| 147 | Mutex::Autolock _l(mLock); |
| 148 | if (mFinishedEvents.isEmpty()) { |
| 149 | break; |
| 150 | } |
| 151 | event = mFinishedEvents[0].getKey(); |
| 152 | handled = mFinishedEvents[0].getValue(); |
| 153 | mFinishedEvents.removeAt(0); |
| 154 | } |
| 155 | env->CallVoidMethod(inputQueueObj.get(), gInputQueueClassInfo.finishInputEvent, |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 156 | reinterpret_cast<jlong>(event), handled); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 157 | recycleInputEvent(event); |
| 158 | } |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | void InputQueue::recycleInputEvent(InputEvent* event) { |
| 164 | mPooledInputEventFactory.recycle(event); |
| 165 | } |
| 166 | |
| 167 | KeyEvent* InputQueue::createKeyEvent() { |
| 168 | return mPooledInputEventFactory.createKeyEvent(); |
| 169 | } |
| 170 | |
| 171 | MotionEvent* InputQueue::createMotionEvent() { |
| 172 | return mPooledInputEventFactory.createMotionEvent(); |
| 173 | } |
| 174 | |
| 175 | void InputQueue::enqueueEvent(InputEvent* event) { |
| 176 | Mutex::Autolock _l(mLock); |
| 177 | mPendingEvents.push(event); |
| 178 | if (mPendingEvents.size() == 1) { |
| 179 | char dummy = 0; |
| 180 | int res = TEMP_FAILURE_RETRY(write(mDispatchWriteFd, &dummy, sizeof(dummy))); |
| 181 | if (res < 0 && errno != EAGAIN) { |
| 182 | ALOGW("Failed writing to dispatch fd: %s", strerror(errno)); |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | InputQueue* InputQueue::createQueue(jobject inputQueueObj, const sp<Looper>& looper) { |
| 188 | int pipeFds[2]; |
| 189 | if (pipe(pipeFds)) { |
| 190 | ALOGW("Could not create native input dispatching pipe: %s", strerror(errno)); |
| 191 | return NULL; |
| 192 | } |
| 193 | fcntl(pipeFds[0], F_SETFL, O_NONBLOCK); |
| 194 | fcntl(pipeFds[1], F_SETFL, O_NONBLOCK); |
| 195 | return new InputQueue(inputQueueObj, looper, pipeFds[0], pipeFds[1]); |
| 196 | } |
| 197 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 198 | static jlong nativeInit(JNIEnv* env, jobject clazz, jobject queueWeak, jobject jMsgQueue) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 199 | sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, jMsgQueue); |
| 200 | if (messageQueue == NULL) { |
| 201 | jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| 202 | return 0; |
| 203 | } |
| 204 | sp<InputQueue> queue = InputQueue::createQueue(queueWeak, messageQueue->getLooper()); |
| 205 | if (!queue.get()) { |
| 206 | jniThrowRuntimeException(env, "InputQueue failed to initialize"); |
| 207 | return 0; |
| 208 | } |
| 209 | queue->incStrong(&gInputQueueClassInfo); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 210 | return reinterpret_cast<jlong>(queue.get()); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 211 | } |
| 212 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 213 | static void nativeDispose(JNIEnv* env, jobject clazz, jlong ptr) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 214 | sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| 215 | queue->detachLooper(); |
| 216 | queue->decStrong(&gInputQueueClassInfo); |
| 217 | } |
| 218 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 219 | static jlong nativeSendKeyEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj, |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 220 | jboolean predispatch) { |
| 221 | InputQueue* queue = reinterpret_cast<InputQueue*>(ptr); |
| 222 | KeyEvent* event = queue->createKeyEvent(); |
| 223 | status_t status = android_view_KeyEvent_toNative(env, eventObj, event); |
| 224 | if (status) { |
| 225 | queue->recycleInputEvent(event); |
| 226 | jniThrowRuntimeException(env, "Could not read contents of KeyEvent object."); |
| 227 | return -1; |
| 228 | } |
| 229 | |
| 230 | if (predispatch) { |
| 231 | event->setFlags(event->getFlags() | AKEY_EVENT_FLAG_PREDISPATCH); |
| 232 | } |
| 233 | |
| 234 | queue->enqueueEvent(event); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 235 | return reinterpret_cast<jlong>(event); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 236 | } |
| 237 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 238 | static jlong nativeSendMotionEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 239 | sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| 240 | MotionEvent* originalEvent = android_view_MotionEvent_getNativePtr(env, eventObj); |
| 241 | if (!originalEvent) { |
| 242 | jniThrowRuntimeException(env, "Could not obtain MotionEvent pointer."); |
| 243 | return -1; |
| 244 | } |
| 245 | MotionEvent* event = queue->createMotionEvent(); |
| 246 | event->copyFrom(originalEvent, true /* keepHistory */); |
| 247 | queue->enqueueEvent(event); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 248 | return reinterpret_cast<jlong>(event); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | static const JNINativeMethod g_methods[] = { |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 252 | { "nativeInit", "(Ljava/lang/ref/WeakReference;Landroid/os/MessageQueue;)J", |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 253 | (void*) nativeInit }, |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 254 | { "nativeDispose", "(J)V", (void*) nativeDispose }, |
| 255 | { "nativeSendKeyEvent", "(JLandroid/view/KeyEvent;Z)J", (void*) nativeSendKeyEvent }, |
| 256 | { "nativeSendMotionEvent", "(JLandroid/view/MotionEvent;)J", (void*) nativeSendMotionEvent }, |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 257 | }; |
| 258 | |
| 259 | static const char* const kInputQueuePathName = "android/view/InputQueue"; |
| 260 | |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 261 | int register_android_view_InputQueue(JNIEnv* env) |
| 262 | { |
Andreas Gampe | 987f79f | 2014-11-18 17:29:46 -0800 | [diff] [blame] | 263 | jclass clazz = FindClassOrDie(env, kInputQueuePathName); |
| 264 | gInputQueueClassInfo.finishInputEvent = GetMethodIDOrDie(env, clazz, "finishInputEvent", |
| 265 | "(JZ)V"); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 266 | |
Andreas Gampe | 987f79f | 2014-11-18 17:29:46 -0800 | [diff] [blame] | 267 | return RegisterMethodsOrDie(env, kInputQueuePathName, g_methods, NELEM(g_methods)); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | } // namespace android |