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/*
* Copyright (C) 2011 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 "InputWindowHandle"
#include "JNIHelp.h"
#include "jni.h"
#include <android_runtime/AndroidRuntime.h>
#include <utils/threads.h>
#include "com_android_server_InputWindowHandle.h"
#include "com_android_server_InputApplicationHandle.h"
namespace android {
static struct {
jfieldID ptr;
jfieldID inputApplicationHandle;
} gInputWindowHandleClassInfo;
static Mutex gHandleMutex;
// --- NativeInputWindowHandle ---
NativeInputWindowHandle::NativeInputWindowHandle(
const sp<InputApplicationHandle>& inputApplicationHandle, jweak objWeak) :
InputWindowHandle(inputApplicationHandle),
mObjWeak(objWeak) {
}
NativeInputWindowHandle::~NativeInputWindowHandle() {
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->DeleteWeakGlobalRef(mObjWeak);
}
jobject NativeInputWindowHandle::getInputWindowHandleObjLocalRef(JNIEnv* env) {
return env->NewLocalRef(mObjWeak);
}
// --- Global functions ---
sp<NativeInputWindowHandle> android_server_InputWindowHandle_getHandle(
JNIEnv* env, jobject inputWindowHandleObj) {
if (!inputWindowHandleObj) {
return NULL;
}
AutoMutex _l(gHandleMutex);
int ptr = env->GetIntField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr);
NativeInputWindowHandle* handle;
if (ptr) {
handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
} else {
jobject inputApplicationHandleObj = env->GetObjectField(inputWindowHandleObj,
gInputWindowHandleClassInfo.inputApplicationHandle);
sp<InputApplicationHandle> inputApplicationHandle =
android_server_InputApplicationHandle_getHandle(env, inputApplicationHandleObj);
env->DeleteLocalRef(inputApplicationHandleObj);
jweak objWeak = env->NewWeakGlobalRef(inputWindowHandleObj);
handle = new NativeInputWindowHandle(inputApplicationHandle, objWeak);
handle->incStrong(inputWindowHandleObj);
env->SetIntField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr,
reinterpret_cast<int>(handle));
}
return handle;
}
// --- JNI ---
static void android_server_InputWindowHandle_nativeDispose(JNIEnv* env, jobject obj) {
AutoMutex _l(gHandleMutex);
int ptr = env->GetIntField(obj, gInputWindowHandleClassInfo.ptr);
if (ptr) {
env->SetIntField(obj, gInputWindowHandleClassInfo.ptr, 0);
NativeInputWindowHandle* handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
handle->decStrong(obj);
}
}
static JNINativeMethod gInputWindowHandleMethods[] = {
/* name, signature, funcPtr */
{ "nativeDispose", "()V",
(void*) android_server_InputWindowHandle_nativeDispose },
};
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(! var, "Unable to find class " className);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find field " fieldName);
int register_android_server_InputWindowHandle(JNIEnv* env) {
int res = jniRegisterNativeMethods(env, "com/android/server/wm/InputWindowHandle",
gInputWindowHandleMethods, NELEM(gInputWindowHandleMethods));
LOG_FATAL_IF(res < 0, "Unable to register native methods.");
jclass clazz;
FIND_CLASS(clazz, "com/android/server/wm/InputWindowHandle");
GET_FIELD_ID(gInputWindowHandleClassInfo.ptr, clazz,
"ptr", "I");
GET_FIELD_ID(gInputWindowHandleClassInfo.inputApplicationHandle,
clazz,
"inputApplicationHandle", "Lcom/android/server/wm/InputApplicationHandle;");
return 0;
}
} /* namespace android */
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