/*
|
* 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 <nativehelper/ScopedLocalRef.h>
|
|
#include <nativehelper/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
|
