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      1 /*
      2  * Copyright (C) 2012 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 #include <input/Input.h>
     18 
     19 #include <android_runtime/AndroidRuntime.h>
     20 #include <nativehelper/jni.h>
     21 #include <nativehelper/JNIHelp.h>
     22 
     23 #include <ScopedLocalRef.h>
     24 
     25 #include "android_view_InputDevice.h"
     26 #include "android_view_KeyCharacterMap.h"
     27 
     28 namespace android {
     29 
     30 static struct {
     31     jclass clazz;
     32 
     33     jmethodID ctor;
     34     jmethodID addMotionRange;
     35 } gInputDeviceClassInfo;
     36 
     37 jobject android_view_InputDevice_create(JNIEnv* env, const InputDeviceInfo& deviceInfo) {
     38     ScopedLocalRef<jstring> nameObj(env, env->NewStringUTF(deviceInfo.getDisplayName().string()));
     39     if (!nameObj.get()) {
     40         return NULL;
     41     }
     42 
     43     ScopedLocalRef<jstring> descriptorObj(env,
     44             env->NewStringUTF(deviceInfo.getIdentifier().descriptor.string()));
     45     if (!descriptorObj.get()) {
     46         return NULL;
     47     }
     48 
     49     ScopedLocalRef<jobject> kcmObj(env,
     50             android_view_KeyCharacterMap_create(env, deviceInfo.getId(),
     51             deviceInfo.getKeyCharacterMap()));
     52     if (!kcmObj.get()) {
     53         return NULL;
     54     }
     55 
     56     const InputDeviceIdentifier& ident = deviceInfo.getIdentifier();
     57 
     58     ScopedLocalRef<jobject> inputDeviceObj(env, env->NewObject(gInputDeviceClassInfo.clazz,
     59                 gInputDeviceClassInfo.ctor, deviceInfo.getId(), deviceInfo.getGeneration(),
     60                 deviceInfo.getControllerNumber(), nameObj.get(),
     61                 static_cast<int32_t>(ident.vendor), static_cast<int32_t>(ident.product),
     62                 descriptorObj.get(), deviceInfo.isExternal(), deviceInfo.getSources(),
     63                 deviceInfo.getKeyboardType(), kcmObj.get(), deviceInfo.hasVibrator(),
     64                 deviceInfo.hasButtonUnderPad()));
     65 
     66     const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
     67     for (size_t i = 0; i < ranges.size(); i++) {
     68         const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
     69         env->CallVoidMethod(inputDeviceObj.get(), gInputDeviceClassInfo.addMotionRange, range.axis,
     70                 range.source, range.min, range.max, range.flat, range.fuzz, range.resolution);
     71         if (env->ExceptionCheck()) {
     72             return NULL;
     73         }
     74     }
     75 
     76     return env->NewLocalRef(inputDeviceObj.get());
     77 }
     78 
     79 
     80 #define FIND_CLASS(var, className) \
     81         var = env->FindClass(className); \
     82         LOG_FATAL_IF(! var, "Unable to find class " className);
     83 
     84 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
     85         var = env->GetMethodID(clazz, methodName, methodDescriptor); \
     86         LOG_FATAL_IF(! var, "Unable to find method " methodName);
     87 
     88 int register_android_view_InputDevice(JNIEnv* env)
     89 {
     90     FIND_CLASS(gInputDeviceClassInfo.clazz, "android/view/InputDevice");
     91     gInputDeviceClassInfo.clazz = jclass(env->NewGlobalRef(gInputDeviceClassInfo.clazz));
     92 
     93     GET_METHOD_ID(gInputDeviceClassInfo.ctor, gInputDeviceClassInfo.clazz,
     94             "<init>",
     95             "(IIILjava/lang/String;IILjava/lang/String;ZIILandroid/view/KeyCharacterMap;ZZ)V");
     96 
     97     GET_METHOD_ID(gInputDeviceClassInfo.addMotionRange, gInputDeviceClassInfo.clazz,
     98             "addMotionRange", "(IIFFFFF)V");
     99 
    100     return 0;
    101 }
    102 
    103 }; // namespace android
    104