/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "InputChannel-JNI"
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#include <nativehelper/JNIHelp.h>
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#include "nativehelper/scoped_utf_chars.h"
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#include <android_runtime/AndroidRuntime.h>
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#include <binder/Parcel.h>
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#include <utils/Log.h>
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#include <input/InputTransport.h>
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#include "android_view_InputChannel.h"
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#include "android_os_Parcel.h"
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#include "android_util_Binder.h"
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#include "core_jni_helpers.h"
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namespace android {
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// ----------------------------------------------------------------------------
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static struct {
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jclass clazz;
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jfieldID mPtr; // native object attached to the DVM InputChannel
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jmethodID ctor;
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} gInputChannelClassInfo;
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// ----------------------------------------------------------------------------
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class NativeInputChannel {
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public:
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explicit NativeInputChannel(const sp<InputChannel>& inputChannel);
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~NativeInputChannel();
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inline sp<InputChannel> getInputChannel() { return mInputChannel; }
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void setDisposeCallback(InputChannelObjDisposeCallback callback, void* data);
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void invokeAndRemoveDisposeCallback(JNIEnv* env, jobject obj);
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private:
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sp<InputChannel> mInputChannel;
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InputChannelObjDisposeCallback mDisposeCallback;
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void* mDisposeData;
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};
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// ----------------------------------------------------------------------------
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NativeInputChannel::NativeInputChannel(const sp<InputChannel>& inputChannel) :
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mInputChannel(inputChannel), mDisposeCallback(NULL) {
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}
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NativeInputChannel::~NativeInputChannel() {
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}
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void NativeInputChannel::setDisposeCallback(InputChannelObjDisposeCallback callback, void* data) {
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mDisposeCallback = callback;
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mDisposeData = data;
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}
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void NativeInputChannel::invokeAndRemoveDisposeCallback(JNIEnv* env, jobject obj) {
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if (mDisposeCallback) {
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mDisposeCallback(env, obj, mInputChannel, mDisposeData);
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mDisposeCallback = NULL;
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mDisposeData = NULL;
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}
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}
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// ----------------------------------------------------------------------------
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static NativeInputChannel* android_view_InputChannel_getNativeInputChannel(JNIEnv* env,
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jobject inputChannelObj) {
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jlong longPtr = env->GetLongField(inputChannelObj, gInputChannelClassInfo.mPtr);
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return reinterpret_cast<NativeInputChannel*>(longPtr);
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}
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static void android_view_InputChannel_setNativeInputChannel(JNIEnv* env, jobject inputChannelObj,
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NativeInputChannel* nativeInputChannel) {
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env->SetLongField(inputChannelObj, gInputChannelClassInfo.mPtr,
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reinterpret_cast<jlong>(nativeInputChannel));
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}
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sp<InputChannel> android_view_InputChannel_getInputChannel(JNIEnv* env, jobject inputChannelObj) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, inputChannelObj);
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return nativeInputChannel != NULL ? nativeInputChannel->getInputChannel() : NULL;
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}
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void android_view_InputChannel_setDisposeCallback(JNIEnv* env, jobject inputChannelObj,
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InputChannelObjDisposeCallback callback, void* data) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, inputChannelObj);
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if (nativeInputChannel == NULL) {
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ALOGW("Cannot set dispose callback because input channel object has not been initialized.");
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} else {
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nativeInputChannel->setDisposeCallback(callback, data);
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}
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}
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static jobject android_view_InputChannel_createInputChannel(JNIEnv* env,
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std::unique_ptr<NativeInputChannel> nativeInputChannel) {
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jobject inputChannelObj = env->NewObject(gInputChannelClassInfo.clazz,
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gInputChannelClassInfo.ctor);
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if (inputChannelObj) {
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android_view_InputChannel_setNativeInputChannel(env, inputChannelObj,
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nativeInputChannel.release());
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}
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return inputChannelObj;
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}
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static jobjectArray android_view_InputChannel_nativeOpenInputChannelPair(JNIEnv* env,
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jclass clazz, jstring nameObj) {
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ScopedUtfChars nameChars(env, nameObj);
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std::string name = nameChars.c_str();
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sp<InputChannel> serverChannel;
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sp<InputChannel> clientChannel;
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status_t result = InputChannel::openInputChannelPair(name, serverChannel, clientChannel);
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if (result) {
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String8 message;
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message.appendFormat("Could not open input channel pair. status=%d", result);
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jniThrowRuntimeException(env, message.string());
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return NULL;
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}
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jobjectArray channelPair = env->NewObjectArray(2, gInputChannelClassInfo.clazz, NULL);
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if (env->ExceptionCheck()) {
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return NULL;
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}
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jobject serverChannelObj = android_view_InputChannel_createInputChannel(env,
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std::make_unique<NativeInputChannel>(serverChannel));
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if (env->ExceptionCheck()) {
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return NULL;
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}
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jobject clientChannelObj = android_view_InputChannel_createInputChannel(env,
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std::make_unique<NativeInputChannel>(clientChannel));
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if (env->ExceptionCheck()) {
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return NULL;
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}
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env->SetObjectArrayElement(channelPair, 0, serverChannelObj);
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env->SetObjectArrayElement(channelPair, 1, clientChannelObj);
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return channelPair;
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}
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static void android_view_InputChannel_nativeDispose(JNIEnv* env, jobject obj, jboolean finalized) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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if (nativeInputChannel) {
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if (finalized) {
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ALOGW("Input channel object '%s' was finalized without being disposed!",
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nativeInputChannel->getInputChannel()->getName().c_str());
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}
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nativeInputChannel->invokeAndRemoveDisposeCallback(env, obj);
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android_view_InputChannel_setNativeInputChannel(env, obj, NULL);
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delete nativeInputChannel;
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}
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}
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static void android_view_InputChannel_nativeTransferTo(JNIEnv* env, jobject obj,
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jobject otherObj) {
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if (android_view_InputChannel_getNativeInputChannel(env, otherObj) != NULL) {
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jniThrowException(env, "java/lang/IllegalStateException",
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"Other object already has a native input channel.");
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return;
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}
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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android_view_InputChannel_setNativeInputChannel(env, otherObj, nativeInputChannel);
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android_view_InputChannel_setNativeInputChannel(env, obj, NULL);
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}
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static void android_view_InputChannel_nativeReadFromParcel(JNIEnv* env, jobject obj,
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jobject parcelObj) {
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if (android_view_InputChannel_getNativeInputChannel(env, obj) != NULL) {
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jniThrowException(env, "java/lang/IllegalStateException",
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"This object already has a native input channel.");
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return;
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}
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Parcel* parcel = parcelForJavaObject(env, parcelObj);
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if (parcel) {
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bool isInitialized = parcel->readInt32();
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if (isInitialized) {
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InputChannel* inputChannel = new InputChannel();
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inputChannel->read(*parcel);
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NativeInputChannel* nativeInputChannel = new NativeInputChannel(inputChannel);
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android_view_InputChannel_setNativeInputChannel(env, obj, nativeInputChannel);
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}
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}
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}
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static void android_view_InputChannel_nativeWriteToParcel(JNIEnv* env, jobject obj,
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jobject parcelObj) {
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Parcel* parcel = parcelForJavaObject(env, parcelObj);
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if (parcel) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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if (nativeInputChannel) {
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sp<InputChannel> inputChannel = nativeInputChannel->getInputChannel();
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parcel->writeInt32(1);
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inputChannel->write(*parcel);
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} else {
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parcel->writeInt32(0);
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}
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}
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}
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static jstring android_view_InputChannel_nativeGetName(JNIEnv* env, jobject obj) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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if (! nativeInputChannel) {
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return NULL;
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}
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jstring name = env->NewStringUTF(nativeInputChannel->getInputChannel()->getName().c_str());
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return name;
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}
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static void android_view_InputChannel_nativeDup(JNIEnv* env, jobject obj, jobject otherObj) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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if (nativeInputChannel) {
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android_view_InputChannel_setNativeInputChannel(env, otherObj,
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new NativeInputChannel(nativeInputChannel->getInputChannel()->dup()));
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}
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}
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static jobject android_view_InputChannel_nativeGetToken(JNIEnv* env, jobject obj) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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if (nativeInputChannel) {
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return javaObjectForIBinder(env, nativeInputChannel->getInputChannel()->getToken());
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}
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return 0;
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}
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static void android_view_InputChannel_nativeSetToken(JNIEnv* env, jobject obj, jobject tokenObj) {
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NativeInputChannel* nativeInputChannel =
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android_view_InputChannel_getNativeInputChannel(env, obj);
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sp<IBinder> token = ibinderForJavaObject(env, tokenObj);
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if (nativeInputChannel != nullptr) {
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nativeInputChannel->getInputChannel()->setToken(token);
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}
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}
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// ----------------------------------------------------------------------------
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static const JNINativeMethod gInputChannelMethods[] = {
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/* name, signature, funcPtr */
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{ "nativeOpenInputChannelPair", "(Ljava/lang/String;)[Landroid/view/InputChannel;",
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(void*)android_view_InputChannel_nativeOpenInputChannelPair },
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{ "nativeDispose", "(Z)V",
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(void*)android_view_InputChannel_nativeDispose },
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{ "nativeTransferTo", "(Landroid/view/InputChannel;)V",
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(void*)android_view_InputChannel_nativeTransferTo },
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{ "nativeReadFromParcel", "(Landroid/os/Parcel;)V",
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(void*)android_view_InputChannel_nativeReadFromParcel },
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{ "nativeWriteToParcel", "(Landroid/os/Parcel;)V",
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(void*)android_view_InputChannel_nativeWriteToParcel },
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{ "nativeGetName", "()Ljava/lang/String;",
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(void*)android_view_InputChannel_nativeGetName },
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{ "nativeDup", "(Landroid/view/InputChannel;)V",
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(void*)android_view_InputChannel_nativeDup },
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{ "nativeGetToken", "()Landroid/os/IBinder;",
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(void*)android_view_InputChannel_nativeGetToken },
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{ "nativeSetToken", "(Landroid/os/IBinder;)V",
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(void*)android_view_InputChannel_nativeSetToken }
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};
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int register_android_view_InputChannel(JNIEnv* env) {
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int res = RegisterMethodsOrDie(env, "android/view/InputChannel", gInputChannelMethods,
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NELEM(gInputChannelMethods));
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jclass clazz = FindClassOrDie(env, "android/view/InputChannel");
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gInputChannelClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
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gInputChannelClassInfo.mPtr = GetFieldIDOrDie(env, gInputChannelClassInfo.clazz, "mPtr", "J");
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gInputChannelClassInfo.ctor = GetMethodIDOrDie(env, gInputChannelClassInfo.clazz, "<init>",
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"()V");
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return res;
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}
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} // namespace android
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