1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "InputApplicationHandle"
18
19 #include <nativehelper/JNIHelp.h>
20 #include "core_jni_helpers.h"
21 #include "jni.h"
22 #include <android_runtime/AndroidRuntime.h>
23 #include <utils/threads.h>
24
25 #include "android_hardware_input_InputApplicationHandle.h"
26 #include "android_util_Binder.h"
27
28 namespace android {
29
30 static struct {
31 jclass clazz;
32 jmethodID ctor;
33 jfieldID ptr;
34 jfieldID name;
35 jfieldID dispatchingTimeoutMillis;
36 jfieldID token;
37 } gInputApplicationHandleClassInfo;
38
39 static Mutex gHandleMutex;
40
41
42 // --- NativeInputApplicationHandle ---
43
NativeInputApplicationHandle(jweak objWeak)44 NativeInputApplicationHandle::NativeInputApplicationHandle(jweak objWeak) :
45 mObjWeak(objWeak) {
46 }
47
~NativeInputApplicationHandle()48 NativeInputApplicationHandle::~NativeInputApplicationHandle() {
49 JNIEnv* env = AndroidRuntime::getJNIEnv();
50 env->DeleteWeakGlobalRef(mObjWeak);
51 }
52
getInputApplicationHandleObjLocalRef(JNIEnv * env)53 jobject NativeInputApplicationHandle::getInputApplicationHandleObjLocalRef(JNIEnv* env) {
54 return env->NewLocalRef(mObjWeak);
55 }
56
updateInfo()57 bool NativeInputApplicationHandle::updateInfo() {
58 JNIEnv* env = AndroidRuntime::getJNIEnv();
59 ScopedLocalRef<jobject> obj(env, env->NewLocalRef(mObjWeak));
60 if (!obj.get()) {
61 return false;
62 }
63 if (mInfo.token.get() != nullptr) {
64 // The java fields are immutable, so it doesn't need to update again.
65 return true;
66 }
67
68 mInfo.name = getStringField(env, obj.get(), gInputApplicationHandleClassInfo.name, "<null>");
69
70 mInfo.dispatchingTimeoutMillis =
71 env->GetLongField(obj.get(), gInputApplicationHandleClassInfo.dispatchingTimeoutMillis);
72
73 ScopedLocalRef<jobject> tokenObj(env, env->GetObjectField(obj.get(),
74 gInputApplicationHandleClassInfo.token));
75 if (tokenObj.get()) {
76 mInfo.token = ibinderForJavaObject(env, tokenObj.get());
77 } else {
78 mInfo.token.clear();
79 }
80
81 return mInfo.token.get() != nullptr;
82 }
83
84 // --- Global functions ---
85
android_view_InputApplicationHandle_getHandle(JNIEnv * env,jobject inputApplicationHandleObj)86 std::shared_ptr<InputApplicationHandle> android_view_InputApplicationHandle_getHandle(
87 JNIEnv* env, jobject inputApplicationHandleObj) {
88 if (!inputApplicationHandleObj) {
89 return NULL;
90 }
91
92 AutoMutex _l(gHandleMutex);
93 jlong ptr = env->GetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr);
94 std::shared_ptr<NativeInputApplicationHandle>* handle;
95 if (ptr) {
96 handle = reinterpret_cast<std::shared_ptr<NativeInputApplicationHandle>*>(ptr);
97 } else {
98 jweak objWeak = env->NewWeakGlobalRef(inputApplicationHandleObj);
99 handle = new std::shared_ptr(std::make_shared<NativeInputApplicationHandle>(objWeak));
100 env->SetLongField(inputApplicationHandleObj, gInputApplicationHandleClassInfo.ptr,
101 reinterpret_cast<jlong>(handle));
102 }
103 return *handle;
104 }
105
android_view_InputApplicationHandle_fromInputApplicationInfo(JNIEnv * env,gui::InputApplicationInfo inputApplicationInfo)106 jobject android_view_InputApplicationHandle_fromInputApplicationInfo(
107 JNIEnv* env, gui::InputApplicationInfo inputApplicationInfo) {
108 jobject binderObject = javaObjectForIBinder(env, inputApplicationInfo.token);
109 ScopedLocalRef<jstring> name(env, env->NewStringUTF(inputApplicationInfo.name.data()));
110 return env->NewObject(gInputApplicationHandleClassInfo.clazz,
111 gInputApplicationHandleClassInfo.ctor, binderObject, name.get(),
112 inputApplicationInfo.dispatchingTimeoutMillis);
113 }
114
115 // --- JNI ---
116
android_view_InputApplicationHandle_nativeDispose(JNIEnv * env,jobject obj)117 static void android_view_InputApplicationHandle_nativeDispose(JNIEnv* env, jobject obj) {
118 AutoMutex _l(gHandleMutex);
119
120 jlong ptr = env->GetLongField(obj, gInputApplicationHandleClassInfo.ptr);
121 if (ptr) {
122 env->SetLongField(obj, gInputApplicationHandleClassInfo.ptr, 0);
123
124 std::shared_ptr<NativeInputApplicationHandle>* handle =
125 reinterpret_cast<std::shared_ptr<NativeInputApplicationHandle>*>(ptr);
126 delete handle;
127 }
128 }
129
130
131 static const JNINativeMethod gInputApplicationHandleMethods[] = {
132 /* name, signature, funcPtr */
133 { "nativeDispose", "()V",
134 (void*) android_view_InputApplicationHandle_nativeDispose },
135 };
136
137 #define FIND_CLASS(var, className) \
138 var = env->FindClass(className); \
139 LOG_FATAL_IF(! (var), "Unable to find class " className);
140
141 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
142 var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
143 LOG_FATAL_IF(! (var), "Unable to find field " fieldName);
144
145 #define GET_METHOD_ID(var, clazz, methodName, methodSignature) \
146 var = env->GetMethodID(clazz, methodName, methodSignature); \
147 LOG_ALWAYS_FATAL_IF(!(var), "Unable to find method " methodName);
148
register_android_view_InputApplicationHandle(JNIEnv * env)149 int register_android_view_InputApplicationHandle(JNIEnv* env) {
150 int res = jniRegisterNativeMethods(env, "android/view/InputApplicationHandle",
151 gInputApplicationHandleMethods, NELEM(gInputApplicationHandleMethods));
152 (void) res; // Faked use when LOG_NDEBUG.
153 LOG_FATAL_IF(res < 0, "Unable to register native methods.");
154
155 jclass clazz;
156 FIND_CLASS(clazz, "android/view/InputApplicationHandle");
157 gInputApplicationHandleClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
158
159 GET_METHOD_ID(gInputApplicationHandleClassInfo.ctor, clazz, "<init>",
160 "(Landroid/os/IBinder;Ljava/lang/String;J)V");
161
162 GET_FIELD_ID(gInputApplicationHandleClassInfo.ptr, clazz,
163 "ptr", "J");
164
165 GET_FIELD_ID(gInputApplicationHandleClassInfo.name, clazz,
166 "name", "Ljava/lang/String;");
167
168 GET_FIELD_ID(gInputApplicationHandleClassInfo.dispatchingTimeoutMillis, clazz,
169 "dispatchingTimeoutMillis", "J");
170
171 GET_FIELD_ID(gInputApplicationHandleClassInfo.token, clazz,
172 "token", "Landroid/os/IBinder;");
173
174 return 0;
175 }
176
177 } /* namespace android */
178