android_view_KeyEvent.cpp revision 3c80a4a044865bdf1289c7896baffa1c082d835c 
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 <utils/Log.h>
23#include <ui/Input.h>
24#include "android_view_KeyEvent.h"
25
26namespace android {
27
28// ----------------------------------------------------------------------------
29
30static struct {
31    jclass clazz;
32
33    jmethodID ctor;
34
35    jfieldID mMetaState;
36    jfieldID mAction;
37    jfieldID mKeyCode;
38    jfieldID mScanCode;
39    jfieldID mRepeatCount;
40    jfieldID mDeviceId;
41    jfieldID mFlags;
42    jfieldID mDownTime;
43    jfieldID mEventTime;
44    jfieldID mCharacters;
45} gKeyEventClassInfo;
46
47// ----------------------------------------------------------------------------
48
49jobject android_view_KeyEvent_fromNative(JNIEnv* env, const KeyEvent* event) {
50    return env->NewObject(gKeyEventClassInfo.clazz, gKeyEventClassInfo.ctor,
51            nanoseconds_to_milliseconds(event->getDownTime()),
52            nanoseconds_to_milliseconds(event->getEventTime()),
53            event->getAction(),
54            event->getKeyCode(),
55            event->getRepeatCount(),
56            event->getMetaState(),
57            event->getDeviceId(),
58            event->getScanCode(),
59            event->getFlags());
60}
61
62void android_view_KeyEvent_toNative(JNIEnv* env, jobject eventObj, int32_t nature,
63        KeyEvent* event) {
64    jint metaState = env->GetIntField(eventObj, gKeyEventClassInfo.mMetaState);
65    jint action = env->GetIntField(eventObj, gKeyEventClassInfo.mAction);
66    jint keyCode = env->GetIntField(eventObj, gKeyEventClassInfo.mKeyCode);
67    jint scanCode = env->GetIntField(eventObj, gKeyEventClassInfo.mScanCode);
68    jint repeatCount = env->GetIntField(eventObj, gKeyEventClassInfo.mRepeatCount);
69    jint deviceId = env->GetIntField(eventObj, gKeyEventClassInfo.mDeviceId);
70    jint flags = env->GetIntField(eventObj, gKeyEventClassInfo.mFlags);
71    jlong downTime = env->GetLongField(eventObj, gKeyEventClassInfo.mDownTime);
72    jlong eventTime = env->GetLongField(eventObj, gKeyEventClassInfo.mEventTime);
73
74    event->initialize(deviceId, nature, action, flags, keyCode, scanCode, metaState, repeatCount,
75            milliseconds_to_nanoseconds(downTime),
76            milliseconds_to_nanoseconds(eventTime));
77}
78
79static jboolean native_isSystemKey(JNIEnv* env, jobject clazz, jint keyCode) {
80    return KeyEvent::isSystemKey(keyCode);
81}
82
83static jboolean native_hasDefaultAction(JNIEnv* env, jobject clazz, jint keyCode) {
84    return KeyEvent::hasDefaultAction(keyCode);
85}
86
87// ----------------------------------------------------------------------------
88
89static const JNINativeMethod g_methods[] = {
90    { "native_isSystemKey", "(I)Z", (void*)native_isSystemKey },
91    { "native_hasDefaultAction", "(I)Z", (void*)native_hasDefaultAction },
92};
93
94static const char* const kKeyEventPathName = "android/view/KeyEvent";
95
96#define FIND_CLASS(var, className) \
97        var = env->FindClass(className); \
98        LOG_FATAL_IF(! var, "Unable to find class " className); \
99        var = jclass(env->NewGlobalRef(var));
100
101#define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
102        var = env->GetMethodID(clazz, methodName, fieldDescriptor); \
103        LOG_FATAL_IF(! var, "Unable to find method" methodName);
104
105#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
106        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
107        LOG_FATAL_IF(! var, "Unable to find field " fieldName);
108
109int register_android_view_KeyEvent(JNIEnv* env) {
110    FIND_CLASS(gKeyEventClassInfo.clazz, kKeyEventPathName);
111
112    GET_METHOD_ID(gKeyEventClassInfo.ctor, gKeyEventClassInfo.clazz,
113            "<init>", "(JJIIIIIII)V");
114
115    GET_FIELD_ID(gKeyEventClassInfo.mMetaState, gKeyEventClassInfo.clazz,
116            "mMetaState", "I");
117    GET_FIELD_ID(gKeyEventClassInfo.mAction, gKeyEventClassInfo.clazz,
118            "mAction", "I");
119    GET_FIELD_ID(gKeyEventClassInfo.mKeyCode, gKeyEventClassInfo.clazz,
120            "mKeyCode", "I");
121    GET_FIELD_ID(gKeyEventClassInfo.mScanCode, gKeyEventClassInfo.clazz,
122            "mScanCode", "I");
123    GET_FIELD_ID(gKeyEventClassInfo.mRepeatCount, gKeyEventClassInfo.clazz,
124            "mRepeatCount", "I");
125    GET_FIELD_ID(gKeyEventClassInfo.mDeviceId, gKeyEventClassInfo.clazz,
126            "mDeviceId", "I");
127    GET_FIELD_ID(gKeyEventClassInfo.mFlags, gKeyEventClassInfo.clazz,
128            "mFlags", "I");
129    GET_FIELD_ID(gKeyEventClassInfo.mDownTime, gKeyEventClassInfo.clazz,
130            "mDownTime", "J");
131    GET_FIELD_ID(gKeyEventClassInfo.mEventTime, gKeyEventClassInfo.clazz,
132            "mEventTime", "J");
133    GET_FIELD_ID(gKeyEventClassInfo.mCharacters, gKeyEventClassInfo.clazz,
134            "mCharacters", "Ljava/lang/String;");
135
136    return AndroidRuntime::registerNativeMethods(
137        env, kKeyEventPathName,
138        g_methods, NELEM(g_methods));
139}
140
141} // namespace android
142