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      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 #ifndef _ANDROID_VIEW_KEYEVENT_H
     18 #define _ANDROID_VIEW_KEYEVENT_H
     19 
     20 #include "jni.h"
     21 #include <utils/Errors.h>
     22 #include <utils/threads.h>
     23 
     24 namespace android {
     25 
     26 class KeyEvent;
     27 
     28 /* Obtains an instance of a DVM KeyEvent object as a copy of a native KeyEvent instance.
     29  * Returns NULL on error. */
     30 extern jobject android_view_KeyEvent_fromNative(JNIEnv* env, const KeyEvent* event);
     31 
     32 /* Copies the contents of a DVM KeyEvent object to a native KeyEvent instance.
     33  * Returns non-zero on error. */
     34 extern status_t android_view_KeyEvent_toNative(JNIEnv* env, jobject eventObj,
     35         KeyEvent* event);
     36 
     37 /* Recycles a DVM KeyEvent object.
     38  * Key events should only be recycled if they are owned by the system since user
     39  * code expects them to be essentially immutable, "tracking" notwithstanding.
     40  * Returns non-zero on error. */
     41 extern status_t android_view_KeyEvent_recycle(JNIEnv* env, jobject eventObj);
     42 
     43 } // namespace android
     44 
     45 #endif // _ANDROID_OS_KEYEVENT_H
     46