Jeff Brown | c28867a | 2013-03-26 15:42:39 -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 "InputEventSender" |
| 18 | |
| 19 | //#define LOG_NDEBUG 0 |
| 20 | |
| 21 | // Log debug messages about the dispatch cycle. |
| 22 | #define DEBUG_DISPATCH_CYCLE 0 |
| 23 | |
| 24 | |
| 25 | #include "JNIHelp.h" |
| 26 | |
| 27 | #include <android_runtime/AndroidRuntime.h> |
| 28 | #include <utils/Log.h> |
| 29 | #include <utils/Looper.h> |
| 30 | #include <utils/threads.h> |
| 31 | #include <utils/KeyedVector.h> |
| 32 | #include <androidfw/InputTransport.h> |
| 33 | #include "android_os_MessageQueue.h" |
| 34 | #include "android_view_InputChannel.h" |
| 35 | #include "android_view_KeyEvent.h" |
| 36 | #include "android_view_MotionEvent.h" |
| 37 | |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 38 | #include <ScopedLocalRef.h> |
| 39 | |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 40 | namespace android { |
| 41 | |
| 42 | static struct { |
| 43 | jclass clazz; |
| 44 | |
| 45 | jmethodID dispatchInputEventFinished; |
| 46 | } gInputEventSenderClassInfo; |
| 47 | |
| 48 | |
| 49 | class NativeInputEventSender : public LooperCallback { |
| 50 | public: |
| 51 | NativeInputEventSender(JNIEnv* env, |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 52 | jobject senderWeak, const sp<InputChannel>& inputChannel, |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 53 | const sp<MessageQueue>& messageQueue); |
| 54 | |
| 55 | status_t initialize(); |
| 56 | void dispose(); |
| 57 | status_t sendKeyEvent(uint32_t seq, const KeyEvent* event); |
| 58 | status_t sendMotionEvent(uint32_t seq, const MotionEvent* event); |
| 59 | |
| 60 | protected: |
| 61 | virtual ~NativeInputEventSender(); |
| 62 | |
| 63 | private: |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 64 | jobject mSenderWeakGlobal; |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 65 | InputPublisher mInputPublisher; |
| 66 | sp<MessageQueue> mMessageQueue; |
| 67 | KeyedVector<uint32_t, uint32_t> mPublishedSeqMap; |
| 68 | uint32_t mNextPublishedSeq; |
| 69 | |
| 70 | const char* getInputChannelName() { |
| 71 | return mInputPublisher.getChannel()->getName().string(); |
| 72 | } |
| 73 | |
| 74 | virtual int handleEvent(int receiveFd, int events, void* data); |
| 75 | status_t receiveFinishedSignals(JNIEnv* env); |
| 76 | }; |
| 77 | |
| 78 | |
| 79 | NativeInputEventSender::NativeInputEventSender(JNIEnv* env, |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 80 | jobject senderWeak, const sp<InputChannel>& inputChannel, |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 81 | const sp<MessageQueue>& messageQueue) : |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 82 | mSenderWeakGlobal(env->NewGlobalRef(senderWeak)), |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 83 | mInputPublisher(inputChannel), mMessageQueue(messageQueue), |
Michael Wright | 10f9b09 | 2013-04-01 13:11:34 -0700 | [diff] [blame] | 84 | mNextPublishedSeq(1) { |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 85 | #if DEBUG_DISPATCH_CYCLE |
| 86 | ALOGD("channel '%s' ~ Initializing input event sender.", getInputChannelName()); |
| 87 | #endif |
| 88 | } |
| 89 | |
| 90 | NativeInputEventSender::~NativeInputEventSender() { |
| 91 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 92 | env->DeleteGlobalRef(mSenderWeakGlobal); |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | status_t NativeInputEventSender::initialize() { |
| 96 | int receiveFd = mInputPublisher.getChannel()->getFd(); |
| 97 | mMessageQueue->getLooper()->addFd(receiveFd, 0, ALOOPER_EVENT_INPUT, this, NULL); |
| 98 | return OK; |
| 99 | } |
| 100 | |
| 101 | void NativeInputEventSender::dispose() { |
| 102 | #if DEBUG_DISPATCH_CYCLE |
| 103 | ALOGD("channel '%s' ~ Disposing input event sender.", getInputChannelName()); |
| 104 | #endif |
| 105 | |
| 106 | mMessageQueue->getLooper()->removeFd(mInputPublisher.getChannel()->getFd()); |
| 107 | } |
| 108 | |
| 109 | status_t NativeInputEventSender::sendKeyEvent(uint32_t seq, const KeyEvent* event) { |
| 110 | #if DEBUG_DISPATCH_CYCLE |
| 111 | ALOGD("channel '%s' ~ Sending key event, seq=%u.", getInputChannelName(), seq); |
| 112 | #endif |
| 113 | |
| 114 | uint32_t publishedSeq = mNextPublishedSeq++; |
| 115 | status_t status = mInputPublisher.publishKeyEvent(publishedSeq, |
| 116 | event->getDeviceId(), event->getSource(), event->getAction(), event->getFlags(), |
| 117 | event->getKeyCode(), event->getScanCode(), event->getMetaState(), |
| 118 | event->getRepeatCount(), event->getDownTime(), event->getEventTime()); |
| 119 | if (status) { |
| 120 | ALOGW("Failed to send key event on channel '%s'. status=%d", |
| 121 | getInputChannelName(), status); |
| 122 | return status; |
| 123 | } |
| 124 | mPublishedSeqMap.add(publishedSeq, seq); |
| 125 | return OK; |
| 126 | } |
| 127 | |
| 128 | status_t NativeInputEventSender::sendMotionEvent(uint32_t seq, const MotionEvent* event) { |
| 129 | #if DEBUG_DISPATCH_CYCLE |
| 130 | ALOGD("channel '%s' ~ Sending motion event, seq=%u.", getInputChannelName(), seq); |
| 131 | #endif |
| 132 | |
| 133 | uint32_t publishedSeq; |
| 134 | for (size_t i = 0; i <= event->getHistorySize(); i++) { |
| 135 | publishedSeq = mNextPublishedSeq++; |
| 136 | status_t status = mInputPublisher.publishMotionEvent(publishedSeq, |
| 137 | event->getDeviceId(), event->getSource(), event->getAction(), event->getFlags(), |
| 138 | event->getEdgeFlags(), event->getMetaState(), event->getButtonState(), |
| 139 | event->getXOffset(), event->getYOffset(), |
| 140 | event->getXPrecision(), event->getYPrecision(), |
| 141 | event->getDownTime(), event->getHistoricalEventTime(i), |
| 142 | event->getPointerCount(), event->getPointerProperties(), |
| 143 | event->getHistoricalRawPointerCoords(0, i)); |
| 144 | if (status) { |
| 145 | ALOGW("Failed to send motion event sample on channel '%s'. status=%d", |
| 146 | getInputChannelName(), status); |
| 147 | return status; |
| 148 | } |
| 149 | } |
| 150 | mPublishedSeqMap.add(publishedSeq, seq); |
| 151 | return OK; |
| 152 | } |
| 153 | |
| 154 | int NativeInputEventSender::handleEvent(int receiveFd, int events, void* data) { |
| 155 | if (events & (ALOOPER_EVENT_ERROR | ALOOPER_EVENT_HANGUP)) { |
Jeff Brown | 44e13ef | 2013-03-27 12:34:30 -0700 | [diff] [blame] | 156 | #if DEBUG_DISPATCH_CYCLE |
| 157 | // This error typically occurs when the consumer has closed the input channel |
| 158 | // as part of finishing an IME session, in which case the publisher will |
| 159 | // soon be disposed as well. |
| 160 | ALOGD("channel '%s' ~ Consumer closed input channel or an error occurred. " |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 161 | "events=0x%x", getInputChannelName(), events); |
Jeff Brown | 44e13ef | 2013-03-27 12:34:30 -0700 | [diff] [blame] | 162 | #endif |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 163 | return 0; // remove the callback |
| 164 | } |
| 165 | |
| 166 | if (!(events & ALOOPER_EVENT_INPUT)) { |
| 167 | ALOGW("channel '%s' ~ Received spurious callback for unhandled poll event. " |
| 168 | "events=0x%x", getInputChannelName(), events); |
| 169 | return 1; |
| 170 | } |
| 171 | |
| 172 | JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| 173 | status_t status = receiveFinishedSignals(env); |
| 174 | mMessageQueue->raiseAndClearException(env, "handleReceiveCallback"); |
| 175 | return status == OK || status == NO_MEMORY ? 1 : 0; |
| 176 | } |
| 177 | |
| 178 | status_t NativeInputEventSender::receiveFinishedSignals(JNIEnv* env) { |
| 179 | #if DEBUG_DISPATCH_CYCLE |
| 180 | ALOGD("channel '%s' ~ Receiving finished signals.", getInputChannelName()); |
| 181 | #endif |
| 182 | |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 183 | ScopedLocalRef<jobject> senderObj(env, NULL); |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 184 | bool skipCallbacks = false; |
| 185 | for (;;) { |
| 186 | uint32_t publishedSeq; |
| 187 | bool handled; |
| 188 | status_t status = mInputPublisher.receiveFinishedSignal(&publishedSeq, &handled); |
| 189 | if (status) { |
| 190 | if (status == WOULD_BLOCK) { |
| 191 | return OK; |
| 192 | } |
| 193 | ALOGE("channel '%s' ~ Failed to consume finished signals. status=%d", |
| 194 | getInputChannelName(), status); |
| 195 | return status; |
| 196 | } |
| 197 | |
| 198 | ssize_t index = mPublishedSeqMap.indexOfKey(publishedSeq); |
| 199 | if (index >= 0) { |
| 200 | uint32_t seq = mPublishedSeqMap.valueAt(index); |
| 201 | mPublishedSeqMap.removeItemsAt(index); |
| 202 | |
| 203 | #if DEBUG_DISPATCH_CYCLE |
| 204 | ALOGD("channel '%s' ~ Received finished signal, seq=%u, handled=%s, " |
| 205 | "pendingEvents=%u.", |
| 206 | getInputChannelName(), seq, handled ? "true" : "false", |
| 207 | mPublishedSeqMap.size()); |
| 208 | #endif |
| 209 | |
| 210 | if (!skipCallbacks) { |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 211 | if (!senderObj.get()) { |
| 212 | senderObj.reset(jniGetReferent(env, mSenderWeakGlobal)); |
| 213 | if (!senderObj.get()) { |
| 214 | ALOGW("channel '%s' ~ Sender object was finalized " |
| 215 | "without being disposed.", getInputChannelName()); |
| 216 | return DEAD_OBJECT; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | env->CallVoidMethod(senderObj.get(), |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 221 | gInputEventSenderClassInfo.dispatchInputEventFinished, |
| 222 | jint(seq), jboolean(handled)); |
| 223 | if (env->ExceptionCheck()) { |
| 224 | ALOGE("Exception dispatching finished signal."); |
| 225 | skipCallbacks = true; |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 233 | static jint nativeInit(JNIEnv* env, jclass clazz, jobject senderWeak, |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 234 | jobject inputChannelObj, jobject messageQueueObj) { |
| 235 | sp<InputChannel> inputChannel = android_view_InputChannel_getInputChannel(env, |
| 236 | inputChannelObj); |
| 237 | if (inputChannel == NULL) { |
| 238 | jniThrowRuntimeException(env, "InputChannel is not initialized."); |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, messageQueueObj); |
| 243 | if (messageQueue == NULL) { |
| 244 | jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | sp<NativeInputEventSender> sender = new NativeInputEventSender(env, |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 249 | senderWeak, inputChannel, messageQueue); |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 250 | status_t status = sender->initialize(); |
| 251 | if (status) { |
| 252 | String8 message; |
| 253 | message.appendFormat("Failed to initialize input event sender. status=%d", status); |
| 254 | jniThrowRuntimeException(env, message.string()); |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | sender->incStrong(gInputEventSenderClassInfo.clazz); // retain a reference for the object |
| 259 | return reinterpret_cast<jint>(sender.get()); |
| 260 | } |
| 261 | |
| 262 | static void nativeDispose(JNIEnv* env, jclass clazz, jint senderPtr) { |
| 263 | sp<NativeInputEventSender> sender = |
| 264 | reinterpret_cast<NativeInputEventSender*>(senderPtr); |
| 265 | sender->dispose(); |
| 266 | sender->decStrong(gInputEventSenderClassInfo.clazz); // drop reference held by the object |
| 267 | } |
| 268 | |
| 269 | static jboolean nativeSendKeyEvent(JNIEnv* env, jclass clazz, jint senderPtr, |
| 270 | jint seq, jobject eventObj) { |
| 271 | sp<NativeInputEventSender> sender = |
| 272 | reinterpret_cast<NativeInputEventSender*>(senderPtr); |
| 273 | KeyEvent event; |
| 274 | android_view_KeyEvent_toNative(env, eventObj, &event); |
| 275 | status_t status = sender->sendKeyEvent(seq, &event); |
| 276 | return !status; |
| 277 | } |
| 278 | |
| 279 | static jboolean nativeSendMotionEvent(JNIEnv* env, jclass clazz, jint senderPtr, |
| 280 | jint seq, jobject eventObj) { |
| 281 | sp<NativeInputEventSender> sender = |
| 282 | reinterpret_cast<NativeInputEventSender*>(senderPtr); |
| 283 | MotionEvent* event = android_view_MotionEvent_getNativePtr(env, eventObj); |
| 284 | status_t status = sender->sendMotionEvent(seq, event); |
| 285 | return !status; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | static JNINativeMethod gMethods[] = { |
| 290 | /* name, signature, funcPtr */ |
| 291 | { "nativeInit", |
Jeff Brown | a4ca8ea | 2013-04-02 18:01:38 -0700 | [diff] [blame] | 292 | "(Ljava/lang/ref/WeakReference;Landroid/view/InputChannel;Landroid/os/MessageQueue;)I", |
Jeff Brown | c28867a | 2013-03-26 15:42:39 -0700 | [diff] [blame] | 293 | (void*)nativeInit }, |
| 294 | { "nativeDispose", "(I)V", |
| 295 | (void*)nativeDispose }, |
| 296 | { "nativeSendKeyEvent", "(IILandroid/view/KeyEvent;)Z", |
| 297 | (void*)nativeSendKeyEvent }, |
| 298 | { "nativeSendMotionEvent", "(IILandroid/view/MotionEvent;)Z", |
| 299 | (void*)nativeSendMotionEvent }, |
| 300 | }; |
| 301 | |
| 302 | #define FIND_CLASS(var, className) \ |
| 303 | var = env->FindClass(className); \ |
| 304 | LOG_FATAL_IF(! var, "Unable to find class " className); \ |
| 305 | var = jclass(env->NewGlobalRef(var)); |
| 306 | |
| 307 | #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ |
| 308 | var = env->GetMethodID(clazz, methodName, methodDescriptor); \ |
| 309 | LOG_FATAL_IF(! var, "Unable to find method " methodName); |
| 310 | |
| 311 | int register_android_view_InputEventSender(JNIEnv* env) { |
| 312 | int res = jniRegisterNativeMethods(env, "android/view/InputEventSender", |
| 313 | gMethods, NELEM(gMethods)); |
| 314 | LOG_FATAL_IF(res < 0, "Unable to register native methods."); |
| 315 | |
| 316 | FIND_CLASS(gInputEventSenderClassInfo.clazz, "android/view/InputEventSender"); |
| 317 | |
| 318 | GET_METHOD_ID(gInputEventSenderClassInfo.dispatchInputEventFinished, |
| 319 | gInputEventSenderClassInfo.clazz, |
| 320 | "dispatchInputEventFinished", "(IZ)V"); |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | } // namespace android |