928e054931
This change implements two heuristics. 1. When events are older than 10 seconds, they are dropped. 2. If the application is currently busy processing an event and the user touches a window belonging to a different application then we drop the currently queued events so the other application can start processing the gesture immediately. Note that the system takes care of synthesizing cancelation events automatically for any events that it drops. Added some new handle types to allow the native dispatcher to indirectly refer to the WindowManager's window state and app window token. This was done to enable the dispatcher to identify the application to which each window belongs but it also eliminates some lookup tables and linear searches through the window list on each key press. Bug: 3224911 Change-Id: I9dae8dfe23d195d76865f97011fe2f1d351e2940
136 lines
4.4 KiB
C++
136 lines
4.4 KiB
C++
/*
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* Copyright (C) 2011 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 "InputWindowHandle"
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#include "JNIHelp.h"
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#include "jni.h"
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#include <android_runtime/AndroidRuntime.h>
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#include <utils/threads.h>
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#include "com_android_server_InputWindowHandle.h"
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#include "com_android_server_InputApplicationHandle.h"
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namespace android {
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static struct {
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jclass clazz;
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jfieldID ptr;
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jfieldID inputApplicationHandle;
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} gInputWindowHandleClassInfo;
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static Mutex gHandleMutex;
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// --- NativeInputWindowHandle ---
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NativeInputWindowHandle::NativeInputWindowHandle(
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const sp<InputApplicationHandle>& inputApplicationHandle, jweak objWeak) :
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InputWindowHandle(inputApplicationHandle),
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mObjWeak(objWeak) {
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}
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NativeInputWindowHandle::~NativeInputWindowHandle() {
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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env->DeleteWeakGlobalRef(mObjWeak);
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}
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jobject NativeInputWindowHandle::getInputWindowHandleObjLocalRef(JNIEnv* env) {
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return env->NewLocalRef(mObjWeak);
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}
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// --- Global functions ---
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sp<NativeInputWindowHandle> android_server_InputWindowHandle_getHandle(
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JNIEnv* env, jobject inputWindowHandleObj) {
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if (!inputWindowHandleObj) {
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return NULL;
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}
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AutoMutex _l(gHandleMutex);
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int ptr = env->GetIntField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr);
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NativeInputWindowHandle* handle;
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if (ptr) {
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handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
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} else {
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jobject inputApplicationHandleObj = env->GetObjectField(inputWindowHandleObj,
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gInputWindowHandleClassInfo.inputApplicationHandle);
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sp<InputApplicationHandle> inputApplicationHandle =
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android_server_InputApplicationHandle_getHandle(env, inputApplicationHandleObj);
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env->DeleteLocalRef(inputApplicationHandleObj);
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jweak objWeak = env->NewWeakGlobalRef(inputWindowHandleObj);
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handle = new NativeInputWindowHandle(inputApplicationHandle, objWeak);
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handle->incStrong(inputWindowHandleObj);
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env->SetIntField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr,
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reinterpret_cast<int>(handle));
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}
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return handle;
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}
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// --- JNI ---
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static void android_server_InputWindowHandle_nativeDispose(JNIEnv* env, jobject obj) {
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AutoMutex _l(gHandleMutex);
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int ptr = env->GetIntField(obj, gInputWindowHandleClassInfo.ptr);
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if (ptr) {
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env->SetIntField(obj, gInputWindowHandleClassInfo.ptr, 0);
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NativeInputWindowHandle* handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
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handle->decStrong(obj);
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}
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}
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static JNINativeMethod gInputWindowHandleMethods[] = {
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/* name, signature, funcPtr */
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{ "nativeDispose", "()V",
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(void*) android_server_InputWindowHandle_nativeDispose },
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};
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#define FIND_CLASS(var, className) \
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var = env->FindClass(className); \
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LOG_FATAL_IF(! var, "Unable to find class " className); \
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var = jclass(env->NewGlobalRef(var));
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#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
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var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
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LOG_FATAL_IF(! var, "Unable to find field " fieldName);
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int register_android_server_InputWindowHandle(JNIEnv* env) {
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int res = jniRegisterNativeMethods(env, "com/android/server/InputWindowHandle",
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gInputWindowHandleMethods, NELEM(gInputWindowHandleMethods));
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LOG_FATAL_IF(res < 0, "Unable to register native methods.");
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FIND_CLASS(gInputWindowHandleClassInfo.clazz, "com/android/server/InputWindowHandle");
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GET_FIELD_ID(gInputWindowHandleClassInfo.ptr, gInputWindowHandleClassInfo.clazz,
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"ptr", "I");
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GET_FIELD_ID(gInputWindowHandleClassInfo.inputApplicationHandle,
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gInputWindowHandleClassInfo.clazz,
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"inputApplicationHandle", "Lcom/android/server/InputApplicationHandle;");
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return 0;
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}
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} /* namespace android */
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