status_t NativeInputEventReceiver::finishInputEvent(uint32_t seq, bool handled) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Finished input event.", getInputChannelName());
}
status_t status = mInputConsumer.sendFinishedSignal(seq, handled);
if (status) {
if (status == WOULD_BLOCK) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Could not send finished signal immediately. "
"Enqueued for later.", getInputChannelName());
}
Finish finish;
finish.seq = seq;
finish.handled = handled;
mFinishQueue.add(finish);
if (mFinishQueue.size() == 1) {
setFdEvents(ALOOPER_EVENT_INPUT | ALOOPER_EVENT_OUTPUT);
}
return OK;
}
ALOGW("Failed to send finished signal on channel '%s'. status=%d",
getInputChannelName(), status);
}
return status;
}
status_t NativeInputEventSender::sendMotionEvent(uint32_t seq, const MotionEvent* event) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Sending motion event, seq=%u.", getInputChannelName(), seq);
}
uint32_t publishedSeq;
for (size_t i = 0; i <= event->getHistorySize(); i++) {
publishedSeq = mNextPublishedSeq++;
status_t status = mInputPublisher.publishMotionEvent(publishedSeq,
event->getDeviceId(), event->getSource(),
event->getAction(), event->getActionButton(), event->getFlags(),
event->getEdgeFlags(), event->getMetaState(), event->getButtonState(),
event->getXOffset(), event->getYOffset(),
event->getXPrecision(), event->getYPrecision(),
event->getDownTime(), event->getHistoricalEventTime(i),
event->getPointerCount(), event->getPointerProperties(),
event->getHistoricalRawPointerCoords(0, i));
if (status) {
ALOGW("Failed to send motion event sample on channel '%s'. status=%d",
getInputChannelName(), status);
return status;
}
}
mPublishedSeqMap.add(publishedSeq, seq);
return OK;
}
int NativeInputEventReceiver::handleEvent(int receiveFd, int events, void* data) {
if (events & (ALOOPER_EVENT_ERROR | ALOOPER_EVENT_HANGUP)) {
// This error typically occurs when the publisher has closed the input channel
// as part of removing a window or finishing an IME session, in which case
// the consumer will soon be disposed as well.
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Publisher closed input channel or an error occurred. "
"events=0x%x", getInputChannelName(), events);
}
return 0; // remove the callback
}
if (events & ALOOPER_EVENT_INPUT) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
status_t status = consumeEvents(env, false /*consumeBatches*/, -1, NULL);
mMessageQueue->raiseAndClearException(env, "handleReceiveCallback");
return status == OK || status == NO_MEMORY ? 1 : 0;
}
if (events & ALOOPER_EVENT_OUTPUT) {
for (size_t i = 0; i < mFinishQueue.size(); i++) {
const Finish& finish = mFinishQueue.itemAt(i);
status_t status = mInputConsumer.sendFinishedSignal(finish.seq, finish.handled);
if (status) {
mFinishQueue.removeItemsAt(0, i);
if (status == WOULD_BLOCK) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Sent %zu queued finish events; %zu left.",
getInputChannelName(), i, mFinishQueue.size());
}
return 1; // keep the callback, try again later
}
ALOGW("Failed to send finished signal on channel '%s'. status=%d",
getInputChannelName(), status);
if (status != DEAD_OBJECT) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
String8 message;
message.appendFormat("Failed to finish input event. status=%d", status);
jniThrowRuntimeException(env, message.string());
mMessageQueue->raiseAndClearException(env, "finishInputEvent");
}
return 0; // remove the callback
}
}
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Sent %zu queued finish events; none left.",
getInputChannelName(), mFinishQueue.size());
}
mFinishQueue.clear();
setFdEvents(ALOOPER_EVENT_INPUT);
return 1;
}
ALOGW("channel '%s' ~ Received spurious callback for unhandled poll event. "
"events=0x%x", getInputChannelName(), events);
return 1;
}
status_t NativeInputEventSender::receiveFinishedSignals(JNIEnv* env) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Receiving finished signals.", getInputChannelName());
}
ScopedLocalRef<jobject> senderObj(env, NULL);
bool skipCallbacks = false;
for (;;) {
uint32_t publishedSeq;
bool handled;
status_t status = mInputPublisher.receiveFinishedSignal(&publishedSeq, &handled);
if (status) {
if (status == WOULD_BLOCK) {
return OK;
}
ALOGE("channel '%s' ~ Failed to consume finished signals. status=%d",
getInputChannelName(), status);
return status;
}
ssize_t index = mPublishedSeqMap.indexOfKey(publishedSeq);
if (index >= 0) {
uint32_t seq = mPublishedSeqMap.valueAt(index);
mPublishedSeqMap.removeItemsAt(index);
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Received finished signal, seq=%u, handled=%s, "
"pendingEvents=%zu.",
getInputChannelName(), seq, handled ? "true" : "false",
mPublishedSeqMap.size());
}
if (!skipCallbacks) {
if (!senderObj.get()) {
senderObj.reset(jniGetReferent(env, mSenderWeakGlobal));
if (!senderObj.get()) {
ALOGW("channel '%s' ~ Sender object was finalized "
"without being disposed.", getInputChannelName());
return DEAD_OBJECT;
}
}
env->CallVoidMethod(senderObj.get(),
gInputEventSenderClassInfo.dispatchInputEventFinished,
jint(seq), jboolean(handled));
if (env->ExceptionCheck()) {
ALOGE("Exception dispatching finished signal.");
skipCallbacks = true;
}
}
}
}
}
void NativeInputEventReceiver::dispose() {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Disposing input event receiver.", getInputChannelName());
}
setFdEvents(0);
}
void NativeInputEventSender::dispose() {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Disposing input event sender.", getInputChannelName());
}
mMessageQueue->getLooper()->removeFd(mInputPublisher.getChannel()->getFd());
}
status_t NativeInputEventSender::sendKeyEvent(uint32_t seq, const KeyEvent* event) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Sending key event, seq=%u.", getInputChannelName(), seq);
}
uint32_t publishedSeq = mNextPublishedSeq++;
status_t status = mInputPublisher.publishKeyEvent(publishedSeq,
event->getDeviceId(), event->getSource(), event->getAction(), event->getFlags(),
event->getKeyCode(), event->getScanCode(), event->getMetaState(),
event->getRepeatCount(), event->getDownTime(), event->getEventTime());
if (status) {
ALOGW("Failed to send key event on channel '%s'. status=%d",
getInputChannelName(), status);
return status;
}
mPublishedSeqMap.add(publishedSeq, seq);
return OK;
}
NativeInputEventReceiver::NativeInputEventReceiver(JNIEnv* env,
jobject receiverWeak, const sp<InputChannel>& inputChannel,
const sp<MessageQueue>& messageQueue) :
mReceiverWeakGlobal(env->NewGlobalRef(receiverWeak)),
mInputConsumer(inputChannel), mMessageQueue(messageQueue),
mBatchedInputEventPending(false), mFdEvents(0) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Initializing input event receiver.", getInputChannelName());
}
}
NativeInputEventSender::NativeInputEventSender(JNIEnv* env,
jobject senderWeak, const sp<InputChannel>& inputChannel,
const sp<MessageQueue>& messageQueue) :
mSenderWeakGlobal(env->NewGlobalRef(senderWeak)),
mInputPublisher(inputChannel), mMessageQueue(messageQueue),
mNextPublishedSeq(1) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Initializing input event sender.", getInputChannelName());
}
}
int NativeInputEventSender::handleEvent(int receiveFd, int events, void* data) {
if (events & (ALOOPER_EVENT_ERROR | ALOOPER_EVENT_HANGUP)) {
// This error typically occurs when the consumer has closed the input channel
// as part of finishing an IME session, in which case the publisher will
// soon be disposed as well.
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Consumer closed input channel or an error occurred. "
"events=0x%x", getInputChannelName(), events);
}
return 0; // remove the callback
}
if (!(events & ALOOPER_EVENT_INPUT)) {
ALOGW("channel '%s' ~ Received spurious callback for unhandled poll event. "
"events=0x%x", getInputChannelName(), events);
return 1;
}
JNIEnv* env = AndroidRuntime::getJNIEnv();
status_t status = receiveFinishedSignals(env);
mMessageQueue->raiseAndClearException(env, "handleReceiveCallback");
return status == OK || status == NO_MEMORY ? 1 : 0;
}
status_t NativeInputEventReceiver::consumeEvents(JNIEnv* env,
bool consumeBatches, nsecs_t frameTime, bool* outConsumedBatch) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Consuming input events, consumeBatches=%s, frameTime=%lld.",
getInputChannelName(), consumeBatches ? "true" : "false", (long long)frameTime);
}
if (consumeBatches) {
mBatchedInputEventPending = false;
}
if (outConsumedBatch) {
*outConsumedBatch = false;
}
ScopedLocalRef<jobject> receiverObj(env, NULL);
bool skipCallbacks = false;
for (;;) {
uint32_t seq;
InputEvent* inputEvent;
status_t status = mInputConsumer.consume(&mInputEventFactory,
consumeBatches, frameTime, &seq, &inputEvent);
if (status) {
if (status == WOULD_BLOCK) {
if (!skipCallbacks && !mBatchedInputEventPending
&& mInputConsumer.hasPendingBatch()) {
// There is a pending batch. Come back later.
if (!receiverObj.get()) {
receiverObj.reset(jniGetReferent(env, mReceiverWeakGlobal));
if (!receiverObj.get()) {
ALOGW("channel '%s' ~ Receiver object was finalized "
"without being disposed.", getInputChannelName());
return DEAD_OBJECT;
}
}
mBatchedInputEventPending = true;
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Dispatching batched input event pending notification.",
getInputChannelName());
}
env->CallVoidMethod(receiverObj.get(),
gInputEventReceiverClassInfo.dispatchBatchedInputEventPending);
if (env->ExceptionCheck()) {
ALOGE("Exception dispatching batched input events.");
mBatchedInputEventPending = false; // try again later
}
}
return OK;
}
ALOGE("channel '%s' ~ Failed to consume input event. status=%d",
getInputChannelName(), status);
return status;
}
assert(inputEvent);
if (!skipCallbacks) {
if (!receiverObj.get()) {
receiverObj.reset(jniGetReferent(env, mReceiverWeakGlobal));
if (!receiverObj.get()) {
ALOGW("channel '%s' ~ Receiver object was finalized "
"without being disposed.", getInputChannelName());
return DEAD_OBJECT;
}
}
jobject inputEventObj;
switch (inputEvent->getType()) {
case AINPUT_EVENT_TYPE_KEY:
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Received key event.", getInputChannelName());
}
inputEventObj = android_view_KeyEvent_fromNative(env,
static_cast<KeyEvent*>(inputEvent));
break;
case AINPUT_EVENT_TYPE_MOTION: {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Received motion event.", getInputChannelName());
}
MotionEvent* motionEvent = static_cast<MotionEvent*>(inputEvent);
if ((motionEvent->getAction() & AMOTION_EVENT_ACTION_MOVE) && outConsumedBatch) {
*outConsumedBatch = true;
}
inputEventObj = android_view_MotionEvent_obtainAsCopy(env, motionEvent);
break;
}
default:
assert(false); // InputConsumer should prevent this from ever happening
inputEventObj = NULL;
}
if (inputEventObj) {
if (kDebugDispatchCycle) {
ALOGD("channel '%s' ~ Dispatching input event.", getInputChannelName());
}
env->CallVoidMethod(receiverObj.get(),
gInputEventReceiverClassInfo.dispatchInputEvent, seq, inputEventObj);
if (env->ExceptionCheck()) {
ALOGE("Exception dispatching input event.");
skipCallbacks = true;
}
env->DeleteLocalRef(inputEventObj);
} else {
ALOGW("channel '%s' ~ Failed to obtain event object.", getInputChannelName());
skipCallbacks = true;
}
}
if (skipCallbacks) {
mInputConsumer.sendFinishedSignal(seq, false);
}
}
}