1/*
2 * Copyright (C) 2010 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 "KeyEvent-JNI"
18
19#include "JNIHelp.h"
20
21#include <android_runtime/AndroidRuntime.h>
22#include <android_runtime/Log.h>
23#include <utils/Log.h>
24#include <input/Input.h>
25#include <ScopedUtfChars.h>
26#include "android_view_KeyEvent.h"
27
28namespace android {
29
30// ----------------------------------------------------------------------------
31
32static struct {
33    jclass clazz;
34
35    jmethodID obtain;
36    jmethodID recycle;
37
38    jfieldID mDeviceId;
39    jfieldID mSource;
40    jfieldID mMetaState;
41    jfieldID mAction;
42    jfieldID mKeyCode;
43    jfieldID mScanCode;
44    jfieldID mRepeatCount;
45    jfieldID mFlags;
46    jfieldID mDownTime;
47    jfieldID mEventTime;
48    jfieldID mCharacters;
49} gKeyEventClassInfo;
50
51// ----------------------------------------------------------------------------
52
53jobject android_view_KeyEvent_fromNative(JNIEnv* env, const KeyEvent* event) {
54    jobject eventObj = env->CallStaticObjectMethod(gKeyEventClassInfo.clazz,
55            gKeyEventClassInfo.obtain,
56            nanoseconds_to_milliseconds(event->getDownTime()),
57            nanoseconds_to_milliseconds(event->getEventTime()),
58            event->getAction(),
59            event->getKeyCode(),
60            event->getRepeatCount(),
61            event->getMetaState(),
62            event->getDeviceId(),
63            event->getScanCode(),
64            event->getFlags(),
65            event->getSource(),
66            NULL);
67    if (env->ExceptionCheck()) {
68        ALOGE("An exception occurred while obtaining a key event.");
69        LOGE_EX(env);
70        env->ExceptionClear();
71        return NULL;
72    }
73    return eventObj;
74}
75
76status_t android_view_KeyEvent_toNative(JNIEnv* env, jobject eventObj,
77        KeyEvent* event) {
78    jint deviceId = env->GetIntField(eventObj, gKeyEventClassInfo.mDeviceId);
79    jint source = env->GetIntField(eventObj, gKeyEventClassInfo.mSource);
80    jint metaState = env->GetIntField(eventObj, gKeyEventClassInfo.mMetaState);
81    jint action = env->GetIntField(eventObj, gKeyEventClassInfo.mAction);
82    jint keyCode = env->GetIntField(eventObj, gKeyEventClassInfo.mKeyCode);
83    jint scanCode = env->GetIntField(eventObj, gKeyEventClassInfo.mScanCode);
84    jint repeatCount = env->GetIntField(eventObj, gKeyEventClassInfo.mRepeatCount);
85    jint flags = env->GetIntField(eventObj, gKeyEventClassInfo.mFlags);
86    jlong downTime = env->GetLongField(eventObj, gKeyEventClassInfo.mDownTime);
87    jlong eventTime = env->GetLongField(eventObj, gKeyEventClassInfo.mEventTime);
88
89    event->initialize(deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount,
90            milliseconds_to_nanoseconds(downTime),
91            milliseconds_to_nanoseconds(eventTime));
92    return OK;
93}
94
95status_t android_view_KeyEvent_recycle(JNIEnv* env, jobject eventObj) {
96    env->CallVoidMethod(eventObj, gKeyEventClassInfo.recycle);
97    if (env->ExceptionCheck()) {
98        ALOGW("An exception occurred while recycling a key event.");
99        LOGW_EX(env);
100        env->ExceptionClear();
101        return UNKNOWN_ERROR;
102    }
103    return OK;
104}
105
106static jstring android_view_KeyEvent_nativeKeyCodeToString(JNIEnv* env, jobject clazz,
107        jint keyCode) {
108    return env->NewStringUTF(KeyEvent::getLabel(keyCode));
109}
110
111static jint android_view_KeyEvent_nativeKeyCodeFromString(JNIEnv* env, jobject clazz,
112        jstring label) {
113    ScopedUtfChars keyLabel(env, label);
114    return KeyEvent::getKeyCodeFromLabel(keyLabel.c_str());
115}
116
117
118// ----------------------------------------------------------------------------
119
120static const JNINativeMethod g_methods[] = {
121    { "nativeKeyCodeToString", "(I)Ljava/lang/String;",
122        (void*)android_view_KeyEvent_nativeKeyCodeToString},
123    { "nativeKeyCodeFromString", "(Ljava/lang/String;)I",
124        (void*)android_view_KeyEvent_nativeKeyCodeFromString},
125};
126
127#define FIND_CLASS(var, className) \
128        var = env->FindClass(className); \
129        LOG_FATAL_IF(! var, "Unable to find class " className); \
130        var = jclass(env->NewGlobalRef(var));
131
132#define GET_STATIC_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
133        var = env->GetStaticMethodID(clazz, methodName, fieldDescriptor); \
134        LOG_FATAL_IF(! var, "Unable to find static method" methodName);
135
136#define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
137        var = env->GetMethodID(clazz, methodName, fieldDescriptor); \
138        LOG_FATAL_IF(! var, "Unable to find method" methodName);
139
140#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
141        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
142        LOG_FATAL_IF(! var, "Unable to find field " fieldName);
143
144int register_android_view_KeyEvent(JNIEnv* env) {
145    FIND_CLASS(gKeyEventClassInfo.clazz, "android/view/KeyEvent");
146
147    GET_STATIC_METHOD_ID(gKeyEventClassInfo.obtain, gKeyEventClassInfo.clazz,
148            "obtain", "(JJIIIIIIIILjava/lang/String;)Landroid/view/KeyEvent;");
149    GET_METHOD_ID(gKeyEventClassInfo.recycle, gKeyEventClassInfo.clazz,
150            "recycle", "()V");
151
152    GET_FIELD_ID(gKeyEventClassInfo.mDeviceId, gKeyEventClassInfo.clazz,
153            "mDeviceId", "I");
154    GET_FIELD_ID(gKeyEventClassInfo.mSource, gKeyEventClassInfo.clazz,
155            "mSource", "I");
156    GET_FIELD_ID(gKeyEventClassInfo.mMetaState, gKeyEventClassInfo.clazz,
157            "mMetaState", "I");
158    GET_FIELD_ID(gKeyEventClassInfo.mAction, gKeyEventClassInfo.clazz,
159            "mAction", "I");
160    GET_FIELD_ID(gKeyEventClassInfo.mKeyCode, gKeyEventClassInfo.clazz,
161            "mKeyCode", "I");
162    GET_FIELD_ID(gKeyEventClassInfo.mScanCode, gKeyEventClassInfo.clazz,
163            "mScanCode", "I");
164    GET_FIELD_ID(gKeyEventClassInfo.mRepeatCount, gKeyEventClassInfo.clazz,
165            "mRepeatCount", "I");
166    GET_FIELD_ID(gKeyEventClassInfo.mFlags, gKeyEventClassInfo.clazz,
167            "mFlags", "I");
168    GET_FIELD_ID(gKeyEventClassInfo.mDownTime, gKeyEventClassInfo.clazz,
169            "mDownTime", "J");
170    GET_FIELD_ID(gKeyEventClassInfo.mEventTime, gKeyEventClassInfo.clazz,
171            "mEventTime", "J");
172    GET_FIELD_ID(gKeyEventClassInfo.mCharacters, gKeyEventClassInfo.clazz,
173            "mCharacters", "Ljava/lang/String;");
174
175    return AndroidRuntime::registerNativeMethods(
176        env, "android/view/KeyEvent", g_methods, NELEM(g_methods));
177}
178
179} // namespace android
180