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      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 <nativehelper/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 
     64 NativeInputWindowHandle::NativeInputWindowHandle(
     65         const sp<InputApplicationHandle>& inputApplicationHandle, jweak objWeak) :
     66         InputWindowHandle(inputApplicationHandle),
     67         mObjWeak(objWeak) {
     68 }
     69 
     70 NativeInputWindowHandle::~NativeInputWindowHandle() {
     71     JNIEnv* env = AndroidRuntime::getJNIEnv();
     72     env->DeleteWeakGlobalRef(mObjWeak);
     73 }
     74 
     75 jobject NativeInputWindowHandle::getInputWindowHandleObjLocalRef(JNIEnv* env) {
     76     return env->NewLocalRef(mObjWeak);
     77 }
     78 
     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 = nameStr;
    107         env->ReleaseStringUTFChars(nameObj, nameStr);
    108         env->DeleteLocalRef(nameObj);
    109     } else {
    110         mInfo->name = "<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 
    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 
    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 const 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 
    227 int register_android_server_InputWindowHandle(JNIEnv* env) {
    228     int res = jniRegisterNativeMethods(env, "com/android/server/input/InputWindowHandle",
    229             gInputWindowHandleMethods, NELEM(gInputWindowHandleMethods));
    230     (void) res;  // Faked use when LOG_NDEBUG.
    231     LOG_FATAL_IF(res < 0, "Unable to register native methods.");
    232 
    233     jclass clazz;
    234     FIND_CLASS(clazz, "com/android/server/input/InputWindowHandle");
    235 
    236     GET_FIELD_ID(gInputWindowHandleClassInfo.ptr, clazz,
    237             "ptr", "J");
    238 
    239     GET_FIELD_ID(gInputWindowHandleClassInfo.inputApplicationHandle,
    240             clazz,
    241             "inputApplicationHandle", "Lcom/android/server/input/InputApplicationHandle;");
    242 
    243     GET_FIELD_ID(gInputWindowHandleClassInfo.inputChannel, clazz,
    244             "inputChannel", "Landroid/view/InputChannel;");
    245 
    246     GET_FIELD_ID(gInputWindowHandleClassInfo.name, clazz,
    247             "name", "Ljava/lang/String;");
    248 
    249     GET_FIELD_ID(gInputWindowHandleClassInfo.layoutParamsFlags, clazz,
    250             "layoutParamsFlags", "I");
    251 
    252     GET_FIELD_ID(gInputWindowHandleClassInfo.layoutParamsType, clazz,
    253             "layoutParamsType", "I");
    254 
    255     GET_FIELD_ID(gInputWindowHandleClassInfo.dispatchingTimeoutNanos, clazz,
    256             "dispatchingTimeoutNanos", "J");
    257 
    258     GET_FIELD_ID(gInputWindowHandleClassInfo.frameLeft, clazz,
    259             "frameLeft", "I");
    260 
    261     GET_FIELD_ID(gInputWindowHandleClassInfo.frameTop, clazz,
    262             "frameTop", "I");
    263 
    264     GET_FIELD_ID(gInputWindowHandleClassInfo.frameRight, clazz,
    265             "frameRight", "I");
    266 
    267     GET_FIELD_ID(gInputWindowHandleClassInfo.frameBottom, clazz,
    268             "frameBottom", "I");
    269 
    270     GET_FIELD_ID(gInputWindowHandleClassInfo.scaleFactor, clazz,
    271             "scaleFactor", "F");
    272 
    273     GET_FIELD_ID(gInputWindowHandleClassInfo.touchableRegion, clazz,
    274             "touchableRegion", "Landroid/graphics/Region;");
    275 
    276     GET_FIELD_ID(gInputWindowHandleClassInfo.visible, clazz,
    277             "visible", "Z");
    278 
    279     GET_FIELD_ID(gInputWindowHandleClassInfo.canReceiveKeys, clazz,
    280             "canReceiveKeys", "Z");
    281 
    282     GET_FIELD_ID(gInputWindowHandleClassInfo.hasFocus, clazz,
    283             "hasFocus", "Z");
    284 
    285     GET_FIELD_ID(gInputWindowHandleClassInfo.hasWallpaper, clazz,
    286             "hasWallpaper", "Z");
    287 
    288     GET_FIELD_ID(gInputWindowHandleClassInfo.paused, clazz,
    289             "paused", "Z");
    290 
    291     GET_FIELD_ID(gInputWindowHandleClassInfo.layer, clazz,
    292             "layer", "I");
    293 
    294     GET_FIELD_ID(gInputWindowHandleClassInfo.ownerPid, clazz,
    295             "ownerPid", "I");
    296 
    297     GET_FIELD_ID(gInputWindowHandleClassInfo.ownerUid, clazz,
    298             "ownerUid", "I");
    299 
    300     GET_FIELD_ID(gInputWindowHandleClassInfo.inputFeatures, clazz,
    301             "inputFeatures", "I");
    302 
    303     GET_FIELD_ID(gInputWindowHandleClassInfo.displayId, clazz,
    304             "displayId", "I");
    305     return 0;
    306 }
    307 
    308 } /* namespace android */
    309