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 "InputWindowHandle"
18 
19 #include "JNIHelp.h"
20 #include "jni.h"
21 #include <android_runtime/AndroidRuntime.h>
22 #include <utils/threads.h>
23 
24 #include <android_view_InputChannel.h>
25 #include <android/graphics/Region.h>
26 #include <ui/Region.h>
27 
28 #include "com_android_server_input_InputWindowHandle.h"
29 #include "com_android_server_input_InputApplicationHandle.h"
30 
31 namespace android {
32 
33 static struct {
34     jfieldID ptr;
35     jfieldID inputApplicationHandle;
36     jfieldID inputChannel;
37     jfieldID name;
38     jfieldID layoutParamsFlags;
39     jfieldID layoutParamsType;
40     jfieldID dispatchingTimeoutNanos;
41     jfieldID frameLeft;
42     jfieldID frameTop;
43     jfieldID frameRight;
44     jfieldID frameBottom;
45     jfieldID scaleFactor;
46     jfieldID touchableRegion;
47     jfieldID visible;
48     jfieldID canReceiveKeys;
49     jfieldID hasFocus;
50     jfieldID hasWallpaper;
51     jfieldID paused;
52     jfieldID layer;
53     jfieldID ownerPid;
54     jfieldID ownerUid;
55     jfieldID inputFeatures;
56     jfieldID displayId;
57 } gInputWindowHandleClassInfo;
58 
59 static Mutex gHandleMutex;
60 
61 
62 // --- NativeInputWindowHandle ---
63 
NativeInputWindowHandle(const sp<InputApplicationHandle> & inputApplicationHandle,jweak objWeak)64 NativeInputWindowHandle::NativeInputWindowHandle(
65         const sp<InputApplicationHandle>& inputApplicationHandle, jweak objWeak) :
66         InputWindowHandle(inputApplicationHandle),
67         mObjWeak(objWeak) {
68 }
69 
~NativeInputWindowHandle()70 NativeInputWindowHandle::~NativeInputWindowHandle() {
71     JNIEnv* env = AndroidRuntime::getJNIEnv();
72     env->DeleteWeakGlobalRef(mObjWeak);
73 }
74 
getInputWindowHandleObjLocalRef(JNIEnv * env)75 jobject NativeInputWindowHandle::getInputWindowHandleObjLocalRef(JNIEnv* env) {
76     return env->NewLocalRef(mObjWeak);
77 }
78 
updateInfo()79 bool NativeInputWindowHandle::updateInfo() {
80     JNIEnv* env = AndroidRuntime::getJNIEnv();
81     jobject obj = env->NewLocalRef(mObjWeak);
82     if (!obj) {
83         releaseInfo();
84         return false;
85     }
86 
87     if (!mInfo) {
88         mInfo = new InputWindowInfo();
89     } else {
90         mInfo->touchableRegion.clear();
91     }
92 
93     jobject inputChannelObj = env->GetObjectField(obj,
94             gInputWindowHandleClassInfo.inputChannel);
95     if (inputChannelObj) {
96         mInfo->inputChannel = android_view_InputChannel_getInputChannel(env, inputChannelObj);
97         env->DeleteLocalRef(inputChannelObj);
98     } else {
99         mInfo->inputChannel.clear();
100     }
101 
102     jstring nameObj = jstring(env->GetObjectField(obj,
103             gInputWindowHandleClassInfo.name));
104     if (nameObj) {
105         const char* nameStr = env->GetStringUTFChars(nameObj, NULL);
106         mInfo->name.setTo(nameStr);
107         env->ReleaseStringUTFChars(nameObj, nameStr);
108         env->DeleteLocalRef(nameObj);
109     } else {
110         mInfo->name.setTo("<null>");
111     }
112 
113     mInfo->layoutParamsFlags = env->GetIntField(obj,
114             gInputWindowHandleClassInfo.layoutParamsFlags);
115     mInfo->layoutParamsType = env->GetIntField(obj,
116             gInputWindowHandleClassInfo.layoutParamsType);
117     mInfo->dispatchingTimeout = env->GetLongField(obj,
118             gInputWindowHandleClassInfo.dispatchingTimeoutNanos);
119     mInfo->frameLeft = env->GetIntField(obj,
120             gInputWindowHandleClassInfo.frameLeft);
121     mInfo->frameTop = env->GetIntField(obj,
122             gInputWindowHandleClassInfo.frameTop);
123     mInfo->frameRight = env->GetIntField(obj,
124             gInputWindowHandleClassInfo.frameRight);
125     mInfo->frameBottom = env->GetIntField(obj,
126             gInputWindowHandleClassInfo.frameBottom);
127     mInfo->scaleFactor = env->GetFloatField(obj,
128             gInputWindowHandleClassInfo.scaleFactor);
129 
130     jobject regionObj = env->GetObjectField(obj,
131             gInputWindowHandleClassInfo.touchableRegion);
132     if (regionObj) {
133         SkRegion* region = android_graphics_Region_getSkRegion(env, regionObj);
134         for (SkRegion::Iterator it(*region); !it.done(); it.next()) {
135             const SkIRect& rect = it.rect();
136             mInfo->addTouchableRegion(Rect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom));
137         }
138         env->DeleteLocalRef(regionObj);
139     }
140 
141     mInfo->visible = env->GetBooleanField(obj,
142             gInputWindowHandleClassInfo.visible);
143     mInfo->canReceiveKeys = env->GetBooleanField(obj,
144             gInputWindowHandleClassInfo.canReceiveKeys);
145     mInfo->hasFocus = env->GetBooleanField(obj,
146             gInputWindowHandleClassInfo.hasFocus);
147     mInfo->hasWallpaper = env->GetBooleanField(obj,
148             gInputWindowHandleClassInfo.hasWallpaper);
149     mInfo->paused = env->GetBooleanField(obj,
150             gInputWindowHandleClassInfo.paused);
151     mInfo->layer = env->GetIntField(obj,
152             gInputWindowHandleClassInfo.layer);
153     mInfo->ownerPid = env->GetIntField(obj,
154             gInputWindowHandleClassInfo.ownerPid);
155     mInfo->ownerUid = env->GetIntField(obj,
156             gInputWindowHandleClassInfo.ownerUid);
157     mInfo->inputFeatures = env->GetIntField(obj,
158             gInputWindowHandleClassInfo.inputFeatures);
159     mInfo->displayId = env->GetIntField(obj,
160             gInputWindowHandleClassInfo.displayId);
161 
162     env->DeleteLocalRef(obj);
163     return true;
164 }
165 
166 
167 // --- Global functions ---
168 
android_server_InputWindowHandle_getHandle(JNIEnv * env,jobject inputWindowHandleObj)169 sp<NativeInputWindowHandle> android_server_InputWindowHandle_getHandle(
170         JNIEnv* env, jobject inputWindowHandleObj) {
171     if (!inputWindowHandleObj) {
172         return NULL;
173     }
174 
175     AutoMutex _l(gHandleMutex);
176 
177     jlong ptr = env->GetLongField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr);
178     NativeInputWindowHandle* handle;
179     if (ptr) {
180         handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
181     } else {
182         jobject inputApplicationHandleObj = env->GetObjectField(inputWindowHandleObj,
183                 gInputWindowHandleClassInfo.inputApplicationHandle);
184         sp<InputApplicationHandle> inputApplicationHandle =
185                 android_server_InputApplicationHandle_getHandle(env, inputApplicationHandleObj);
186         env->DeleteLocalRef(inputApplicationHandleObj);
187 
188         jweak objWeak = env->NewWeakGlobalRef(inputWindowHandleObj);
189         handle = new NativeInputWindowHandle(inputApplicationHandle, objWeak);
190         handle->incStrong((void*)android_server_InputWindowHandle_getHandle);
191         env->SetLongField(inputWindowHandleObj, gInputWindowHandleClassInfo.ptr,
192                 reinterpret_cast<jlong>(handle));
193     }
194     return handle;
195 }
196 
197 
198 // --- JNI ---
199 
android_server_InputWindowHandle_nativeDispose(JNIEnv * env,jobject obj)200 static void android_server_InputWindowHandle_nativeDispose(JNIEnv* env, jobject obj) {
201     AutoMutex _l(gHandleMutex);
202 
203     jlong ptr = env->GetLongField(obj, gInputWindowHandleClassInfo.ptr);
204     if (ptr) {
205         env->SetLongField(obj, gInputWindowHandleClassInfo.ptr, 0);
206 
207         NativeInputWindowHandle* handle = reinterpret_cast<NativeInputWindowHandle*>(ptr);
208         handle->decStrong((void*)android_server_InputWindowHandle_getHandle);
209     }
210 }
211 
212 
213 static JNINativeMethod gInputWindowHandleMethods[] = {
214     /* name, signature, funcPtr */
215     { "nativeDispose", "()V",
216             (void*) android_server_InputWindowHandle_nativeDispose },
217 };
218 
219 #define FIND_CLASS(var, className) \
220         var = env->FindClass(className); \
221         LOG_FATAL_IF(! var, "Unable to find class " className);
222 
223 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
224         var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
225         LOG_FATAL_IF(! var, "Unable to find field " fieldName);
226 
register_android_server_InputWindowHandle(JNIEnv * env)227 int register_android_server_InputWindowHandle(JNIEnv* env) {
228     int res = jniRegisterNativeMethods(env, "com/android/server/input/InputWindowHandle",
229             gInputWindowHandleMethods, NELEM(gInputWindowHandleMethods));
230     LOG_FATAL_IF(res < 0, "Unable to register native methods.");
231 
232     jclass clazz;
233     FIND_CLASS(clazz, "com/android/server/input/InputWindowHandle");
234 
235     GET_FIELD_ID(gInputWindowHandleClassInfo.ptr, clazz,
236             "ptr", "J");
237 
238     GET_FIELD_ID(gInputWindowHandleClassInfo.inputApplicationHandle,
239             clazz,
240             "inputApplicationHandle", "Lcom/android/server/input/InputApplicationHandle;");
241 
242     GET_FIELD_ID(gInputWindowHandleClassInfo.inputChannel, clazz,
243             "inputChannel", "Landroid/view/InputChannel;");
244 
245     GET_FIELD_ID(gInputWindowHandleClassInfo.name, clazz,
246             "name", "Ljava/lang/String;");
247 
248     GET_FIELD_ID(gInputWindowHandleClassInfo.layoutParamsFlags, clazz,
249             "layoutParamsFlags", "I");
250 
251     GET_FIELD_ID(gInputWindowHandleClassInfo.layoutParamsType, clazz,
252             "layoutParamsType", "I");
253 
254     GET_FIELD_ID(gInputWindowHandleClassInfo.dispatchingTimeoutNanos, clazz,
255             "dispatchingTimeoutNanos", "J");
256 
257     GET_FIELD_ID(gInputWindowHandleClassInfo.frameLeft, clazz,
258             "frameLeft", "I");
259 
260     GET_FIELD_ID(gInputWindowHandleClassInfo.frameTop, clazz,
261             "frameTop", "I");
262 
263     GET_FIELD_ID(gInputWindowHandleClassInfo.frameRight, clazz,
264             "frameRight", "I");
265 
266     GET_FIELD_ID(gInputWindowHandleClassInfo.frameBottom, clazz,
267             "frameBottom", "I");
268 
269     GET_FIELD_ID(gInputWindowHandleClassInfo.scaleFactor, clazz,
270             "scaleFactor", "F");
271 
272     GET_FIELD_ID(gInputWindowHandleClassInfo.touchableRegion, clazz,
273             "touchableRegion", "Landroid/graphics/Region;");
274 
275     GET_FIELD_ID(gInputWindowHandleClassInfo.visible, clazz,
276             "visible", "Z");
277 
278     GET_FIELD_ID(gInputWindowHandleClassInfo.canReceiveKeys, clazz,
279             "canReceiveKeys", "Z");
280 
281     GET_FIELD_ID(gInputWindowHandleClassInfo.hasFocus, clazz,
282             "hasFocus", "Z");
283 
284     GET_FIELD_ID(gInputWindowHandleClassInfo.hasWallpaper, clazz,
285             "hasWallpaper", "Z");
286 
287     GET_FIELD_ID(gInputWindowHandleClassInfo.paused, clazz,
288             "paused", "Z");
289 
290     GET_FIELD_ID(gInputWindowHandleClassInfo.layer, clazz,
291             "layer", "I");
292 
293     GET_FIELD_ID(gInputWindowHandleClassInfo.ownerPid, clazz,
294             "ownerPid", "I");
295 
296     GET_FIELD_ID(gInputWindowHandleClassInfo.ownerUid, clazz,
297             "ownerUid", "I");
298 
299     GET_FIELD_ID(gInputWindowHandleClassInfo.inputFeatures, clazz,
300             "inputFeatures", "I");
301 
302     GET_FIELD_ID(gInputWindowHandleClassInfo.displayId, clazz,
303             "displayId", "I");
304     return 0;
305 }
306 
307 } /* namespace android */
308