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> |
| 29 | #include <ScopedLocalRef.h> |
| 30 | |
| 31 | #include "JNIHelp.h" |
| 32 | #include "android_os_MessageQueue.h" |
| 33 | #include "android_view_KeyEvent.h" |
| 34 | #include "android_view_MotionEvent.h" |
| 35 | |
| 36 | namespace android { |
| 37 | |
| 38 | static struct { |
| 39 | jmethodID finishInputEvent; |
| 40 | } gInputQueueClassInfo; |
| 41 | |
| 42 | enum { |
| 43 | MSG_FINISH_INPUT = 1, |
| 44 | }; |
| 45 | |
| 46 | InputQueue::InputQueue(jobject inputQueueObj, const sp<Looper>& looper, |
| 47 | int dispatchReadFd, int dispatchWriteFd) : |
| 48 | mDispatchReadFd(dispatchReadFd), mDispatchWriteFd(dispatchWriteFd), |
| 49 | mDispatchLooper(looper), mHandler(new WeakMessageHandler(this)) { |
| 50 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 51 | mInputQueueWeakGlobal = env->NewGlobalRef(inputQueueObj); |
| 52 | } |
| 53 | |
| 54 | InputQueue::~InputQueue() { |
| 55 | mDispatchLooper->removeMessages(mHandler); |
| 56 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 57 | env->DeleteGlobalRef(mInputQueueWeakGlobal); |
| 58 | close(mDispatchReadFd); |
| 59 | close(mDispatchWriteFd); |
| 60 | } |
| 61 | |
| 62 | void InputQueue::attachLooper(Looper* looper, int ident, |
| 63 | ALooper_callbackFunc callback, void* data) { |
| 64 | Mutex::Autolock _l(mLock); |
| 65 | for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| 66 | if (looper == mAppLoopers[i]) { |
| 67 | return; |
| 68 | } |
| 69 | } |
| 70 | mAppLoopers.push(looper); |
| 71 | looper->addFd(mDispatchReadFd, ident, ALOOPER_EVENT_INPUT, callback, data); |
| 72 | } |
| 73 | |
| 74 | void InputQueue::detachLooper() { |
| 75 | Mutex::Autolock _l(mLock); |
| 76 | detachLooperLocked(); |
| 77 | } |
| 78 | |
| 79 | void InputQueue::detachLooperLocked() { |
| 80 | for (size_t i = 0; i < mAppLoopers.size(); i++) { |
| 81 | mAppLoopers[i]->removeFd(mDispatchReadFd); |
| 82 | } |
| 83 | mAppLoopers.clear(); |
| 84 | } |
| 85 | |
| 86 | bool InputQueue::hasEvents() { |
| 87 | Mutex::Autolock _l(mLock); |
| 88 | return mPendingEvents.size() > 0; |
| 89 | } |
| 90 | |
| 91 | status_t InputQueue::getEvent(InputEvent** outEvent) { |
| 92 | Mutex::Autolock _l(mLock); |
| 93 | *outEvent = NULL; |
| 94 | if (!mPendingEvents.isEmpty()) { |
| 95 | *outEvent = mPendingEvents[0]; |
| 96 | mPendingEvents.removeAt(0); |
| 97 | } |
| 98 | |
| 99 | if (mPendingEvents.isEmpty()) { |
| 100 | char byteread[16]; |
| 101 | ssize_t nRead; |
| 102 | do { |
| 103 | nRead = TEMP_FAILURE_RETRY(read(mDispatchReadFd, &byteread, sizeof(byteread))); |
| 104 | if (nRead < 0 && errno != EAGAIN) { |
| 105 | ALOGW("Failed to read from native dispatch pipe: %s", strerror(errno)); |
| 106 | } |
| 107 | } while (nRead > 0); |
| 108 | } |
| 109 | |
| 110 | return *outEvent != NULL ? OK : WOULD_BLOCK; |
| 111 | } |
| 112 | |
| 113 | bool InputQueue::preDispatchEvent(InputEvent* e) { |
| 114 | if (e->getType() == AINPUT_EVENT_TYPE_KEY) { |
| 115 | KeyEvent* keyEvent = static_cast<KeyEvent*>(e); |
| 116 | if (keyEvent->getFlags() & AKEY_EVENT_FLAG_PREDISPATCH) { |
| 117 | finishEvent(e, false); |
| 118 | return true; |
| 119 | } |
| 120 | } |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | void InputQueue::finishEvent(InputEvent* event, bool handled) { |
| 125 | Mutex::Autolock _l(mLock); |
| 126 | mFinishedEvents.push(key_value_pair_t<InputEvent*, bool>(event, handled)); |
| 127 | if (mFinishedEvents.size() == 1) { |
| 128 | mDispatchLooper->sendMessage(this, Message(MSG_FINISH_INPUT)); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | void InputQueue::handleMessage(const Message& message) { |
| 133 | switch(message.what) { |
| 134 | case MSG_FINISH_INPUT: |
| 135 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 136 | ScopedLocalRef<jobject> inputQueueObj(env, jniGetReferent(env, mInputQueueWeakGlobal)); |
| 137 | if (!inputQueueObj.get()) { |
| 138 | ALOGW("InputQueue was finalized without being disposed"); |
| 139 | return; |
| 140 | } |
| 141 | while (true) { |
| 142 | InputEvent* event; |
| 143 | bool handled; |
| 144 | { |
| 145 | Mutex::Autolock _l(mLock); |
| 146 | if (mFinishedEvents.isEmpty()) { |
| 147 | break; |
| 148 | } |
| 149 | event = mFinishedEvents[0].getKey(); |
| 150 | handled = mFinishedEvents[0].getValue(); |
| 151 | mFinishedEvents.removeAt(0); |
| 152 | } |
| 153 | env->CallVoidMethod(inputQueueObj.get(), gInputQueueClassInfo.finishInputEvent, |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 154 | reinterpret_cast<jlong>(event), handled); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 155 | recycleInputEvent(event); |
| 156 | } |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | void InputQueue::recycleInputEvent(InputEvent* event) { |
| 162 | mPooledInputEventFactory.recycle(event); |
| 163 | } |
| 164 | |
| 165 | KeyEvent* InputQueue::createKeyEvent() { |
| 166 | return mPooledInputEventFactory.createKeyEvent(); |
| 167 | } |
| 168 | |
| 169 | MotionEvent* InputQueue::createMotionEvent() { |
| 170 | return mPooledInputEventFactory.createMotionEvent(); |
| 171 | } |
| 172 | |
| 173 | void InputQueue::enqueueEvent(InputEvent* event) { |
| 174 | Mutex::Autolock _l(mLock); |
| 175 | mPendingEvents.push(event); |
| 176 | if (mPendingEvents.size() == 1) { |
| 177 | char dummy = 0; |
| 178 | int res = TEMP_FAILURE_RETRY(write(mDispatchWriteFd, &dummy, sizeof(dummy))); |
| 179 | if (res < 0 && errno != EAGAIN) { |
| 180 | ALOGW("Failed writing to dispatch fd: %s", strerror(errno)); |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | InputQueue* InputQueue::createQueue(jobject inputQueueObj, const sp<Looper>& looper) { |
| 186 | int pipeFds[2]; |
| 187 | if (pipe(pipeFds)) { |
| 188 | ALOGW("Could not create native input dispatching pipe: %s", strerror(errno)); |
| 189 | return NULL; |
| 190 | } |
| 191 | fcntl(pipeFds[0], F_SETFL, O_NONBLOCK); |
| 192 | fcntl(pipeFds[1], F_SETFL, O_NONBLOCK); |
| 193 | return new InputQueue(inputQueueObj, looper, pipeFds[0], pipeFds[1]); |
| 194 | } |
| 195 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 196 | static jlong nativeInit(JNIEnv* env, jobject clazz, jobject queueWeak, jobject jMsgQueue) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 197 | sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, jMsgQueue); |
| 198 | if (messageQueue == NULL) { |
| 199 | jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| 200 | return 0; |
| 201 | } |
| 202 | sp<InputQueue> queue = InputQueue::createQueue(queueWeak, messageQueue->getLooper()); |
| 203 | if (!queue.get()) { |
| 204 | jniThrowRuntimeException(env, "InputQueue failed to initialize"); |
| 205 | return 0; |
| 206 | } |
| 207 | queue->incStrong(&gInputQueueClassInfo); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 208 | return reinterpret_cast<jlong>(queue.get()); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 209 | } |
| 210 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 211 | static void nativeDispose(JNIEnv* env, jobject clazz, jlong ptr) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 212 | sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| 213 | queue->detachLooper(); |
| 214 | queue->decStrong(&gInputQueueClassInfo); |
| 215 | } |
| 216 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 217 | static jlong nativeSendKeyEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj, |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 218 | jboolean predispatch) { |
| 219 | InputQueue* queue = reinterpret_cast<InputQueue*>(ptr); |
| 220 | KeyEvent* event = queue->createKeyEvent(); |
| 221 | status_t status = android_view_KeyEvent_toNative(env, eventObj, event); |
| 222 | if (status) { |
| 223 | queue->recycleInputEvent(event); |
| 224 | jniThrowRuntimeException(env, "Could not read contents of KeyEvent object."); |
| 225 | return -1; |
| 226 | } |
| 227 | |
| 228 | if (predispatch) { |
| 229 | event->setFlags(event->getFlags() | AKEY_EVENT_FLAG_PREDISPATCH); |
| 230 | } |
| 231 | |
| 232 | queue->enqueueEvent(event); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 233 | return reinterpret_cast<jlong>(event); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 234 | } |
| 235 | |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 236 | static jlong nativeSendMotionEvent(JNIEnv* env, jobject clazz, jlong ptr, jobject eventObj) { |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 237 | sp<InputQueue> queue = reinterpret_cast<InputQueue*>(ptr); |
| 238 | MotionEvent* originalEvent = android_view_MotionEvent_getNativePtr(env, eventObj); |
| 239 | if (!originalEvent) { |
| 240 | jniThrowRuntimeException(env, "Could not obtain MotionEvent pointer."); |
| 241 | return -1; |
| 242 | } |
| 243 | MotionEvent* event = queue->createMotionEvent(); |
| 244 | event->copyFrom(originalEvent, true /* keepHistory */); |
| 245 | queue->enqueueEvent(event); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 246 | return reinterpret_cast<jlong>(event); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | static const JNINativeMethod g_methods[] = { |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 250 | { "nativeInit", "(Ljava/lang/ref/WeakReference;Landroid/os/MessageQueue;)J", |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 251 | (void*) nativeInit }, |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 252 | { "nativeDispose", "(J)V", (void*) nativeDispose }, |
| 253 | { "nativeSendKeyEvent", "(JLandroid/view/KeyEvent;Z)J", (void*) nativeSendKeyEvent }, |
| 254 | { "nativeSendMotionEvent", "(JLandroid/view/MotionEvent;)J", (void*) nativeSendMotionEvent }, |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
| 257 | static const char* const kInputQueuePathName = "android/view/InputQueue"; |
| 258 | |
| 259 | #define FIND_CLASS(var, className) \ |
| 260 | do { \ |
| 261 | var = env->FindClass(className); \ |
| 262 | LOG_FATAL_IF(! var, "Unable to find class %s", className); \ |
| 263 | } while(0) |
| 264 | |
| 265 | #define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \ |
| 266 | do { \ |
| 267 | var = env->GetMethodID(clazz, methodName, fieldDescriptor); \ |
| 268 | LOG_FATAL_IF(! var, "Unable to find method" methodName); \ |
| 269 | } while(0) |
| 270 | |
| 271 | int register_android_view_InputQueue(JNIEnv* env) |
| 272 | { |
| 273 | jclass clazz; |
| 274 | FIND_CLASS(clazz, kInputQueuePathName); |
Ashok Bhat | a931d521 | 2014-01-08 14:04:51 +0000 | [diff] [blame] | 275 | GET_METHOD_ID(gInputQueueClassInfo.finishInputEvent, clazz, "finishInputEvent", "(JZ)V"); |
Michael Wright | a44dd26 | 2013-04-10 21:12:00 -0700 | [diff] [blame] | 276 | |
| 277 | return AndroidRuntime::registerNativeMethods( |
| 278 | env, kInputQueuePathName, |
| 279 | g_methods, NELEM(g_methods)); |
| 280 | } |
| 281 | |
| 282 | } // namespace android |