android_view_InputDevice.cpp revision af9e8d38184c6ba4d2d3eb5bde7014a66dd8a78b 
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 <androidfw/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
28namespace android {
29
30static struct {
31    jclass clazz;
32
33    jmethodID ctor;
34    jmethodID addMotionRange;
35} gInputDeviceClassInfo;
36
37jobject android_view_InputDevice_create(JNIEnv* env, const InputDeviceInfo& deviceInfo) {
38    ScopedLocalRef<jstring> nameObj(env, env->NewStringUTF(deviceInfo.getName().string()));
39    if (!nameObj.get()) {
40        return NULL;
41    }
42
43    ScopedLocalRef<jstring> descriptorObj(env,
44            env->NewStringUTF(deviceInfo.getDescriptor().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    ScopedLocalRef<jobject> inputDeviceObj(env, env->NewObject(gInputDeviceClassInfo.clazz,
57            gInputDeviceClassInfo.ctor, deviceInfo.getId(), deviceInfo.getGeneration(),
58            nameObj.get(), descriptorObj.get(),
59            deviceInfo.getSources(), deviceInfo.getKeyboardType(),
60            kcmObj.get()));
61
62    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
63    for (size_t i = 0; i < ranges.size(); i++) {
64        const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
65        env->CallVoidMethod(inputDeviceObj.get(), gInputDeviceClassInfo.addMotionRange,
66                range.axis, range.source, range.min, range.max, range.flat, range.fuzz);
67        if (env->ExceptionCheck()) {
68            return NULL;
69        }
70    }
71
72    return env->NewLocalRef(inputDeviceObj.get());
73}
74
75
76#define FIND_CLASS(var, className) \
77        var = env->FindClass(className); \
78        LOG_FATAL_IF(! var, "Unable to find class " className);
79
80#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \
81        var = env->GetMethodID(clazz, methodName, methodDescriptor); \
82        LOG_FATAL_IF(! var, "Unable to find method " methodName);
83
84int register_android_view_InputDevice(JNIEnv* env)
85{
86    FIND_CLASS(gInputDeviceClassInfo.clazz, "android/view/InputDevice");
87    gInputDeviceClassInfo.clazz = jclass(env->NewGlobalRef(gInputDeviceClassInfo.clazz));
88
89    GET_METHOD_ID(gInputDeviceClassInfo.ctor, gInputDeviceClassInfo.clazz,
90            "<init>", "(IILjava/lang/String;Ljava/lang/String;IILandroid/view/KeyCharacterMap;)V");
91
92    GET_METHOD_ID(gInputDeviceClassInfo.addMotionRange, gInputDeviceClassInfo.clazz,
93            "addMotionRange", "(IIFFFF)V");
94
95    return 0;
96}
97
98}; // namespace android
99