1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 #import "sun_lwawt_macosx_CDropTargetContextPeer.h"

    27 

    28 #import <JavaNativeFoundation/JavaNativeFoundation.h>

    29 

    30 #import "CDataTransferer.h"

    31 #import "CDropTarget.h"

    32 #import "DnDUtilities.h"

    33 #import "ThreadUtilities.h"

    34 

    35 JNF_CLASS_CACHE(jc_CDropTargetContextPeer, "sun/lwawt/macosx/CDropTargetContextPeer");

    36 

    37 

    38 static void TransferFailed(JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jdroptransfer, jlong jformat) {

    39     AWT_ASSERT_NOT_APPKIT_THREAD;

    40     JNF_MEMBER_CACHE(transferFailedMethod, jc_CDropTargetContextPeer, "transferFailed", "(J)V");

    41     JNFCallVoidMethod(env, jthis, transferFailedMethod, jformat); // AWT_THREADING Safe (!appKit)

    42 }

    43 

    44 static CDropTarget* GetCDropTarget(jlong jdroptarget) {

    45     CDropTarget* dropTarget = (CDropTarget*) jlong_to_ptr(jdroptarget);

    46 

    47     // Make sure the drop target is of the right kind:

    48     if ([dropTarget isKindOfClass:[CDropTarget class]]) {

    49         return dropTarget;

    50     }

    51 

    52     return nil;

    53 }

    54 

    55 

    56 /*

    57  * Class:     sun_lwawt_macosx_CDropTargetContextPeer

    58  * Method:    startTransfer

    59  * Signature: (JJ)J

    60  */

    61 JNIEXPORT jlong JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer

    62   (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jformat)

    63 {

    64     AWT_ASSERT_NOT_APPKIT_THREAD;

    65 

    66     jlong result = (jlong) 0L;

    67 

    68     // Currently startTransfer and endTransfer are synchronous since [CDropTarget copyDraggingDataForFormat]

    69     // works off a data copy and doesn't have to go to the native event thread to get the data.

    70     // We can have endTransfer just call startTransfer.

    71 

    72 JNF_COCOA_ENTER(env);

    73     // Get the drop target native object:

    74     CDropTarget* dropTarget = GetCDropTarget(jdroptarget);

    75     if (dropTarget == nil) {

    76         DLog2(@"[CDropTargetContextPeer startTransfer]: GetCDropTarget failed for %d.\n", (NSInteger) jdroptarget);

    77         TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);

    78         return result;

    79     }

    80 

    81     JNF_MEMBER_CACHE(newDataMethod, jc_CDropTargetContextPeer, "newData", "(J[B)V");

    82     if ((*env)->ExceptionOccurred(env) || !newDataMethod) {

    83         DLog2(@"[CDropTargetContextPeer startTransfer]: couldn't get newData method for %d.\n", (NSInteger) jdroptarget);

    84         TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);

    85         return result;

    86     }

    87 

    88     // Get data from drop target:

    89     jobject jdropdata = [dropTarget copyDraggingDataForFormat:jformat];

    90     if (!jdropdata) {

    91         DLog2(@"[CDropTargetContextPeer startTransfer]: copyDraggingDataForFormat failed for %d.\n", (NSInteger) jdroptarget);

    92         TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);

    93         return result;

    94     }

    95 

    96     // Pass the data to drop target:

    97     @try {

    98         JNFCallVoidMethod(env, jthis, newDataMethod, jformat, jdropdata); // AWT_THREADING Safe (!appKit)

    99     } @catch (NSException *ex) {

   100         DLog2(@"[CDropTargetContextPeer startTransfer]: exception in newData() for %d.\n", (NSInteger) jdroptarget);

   101         JNFDeleteGlobalRef(env, jdropdata);

   102         TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);

   103         return result;

   104     }

   105 

   106     // if no error return dropTarget's draggingSequence

   107     result = [dropTarget getDraggingSequenceNumber];

   108 JNF_COCOA_EXIT(env);

   109 

   110     return result;

   111 }

   112 

   113 /*

   114  * Class:     sun_lwawt_macosx_CDropTargetContextPeer

   115  * Method:    addTransfer

   116  * Signature: (JJJ)V

   117  */

   118 JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_addTransfer

   119   (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jdroptransfer, jlong jformat)

   120 {

   121     // Currently startTransfer and endTransfer are synchronous since [CDropTarget copyDraggingDataForFormat]

   122     // works off a data copy and doesn't have to go to the native event thread to get the data.

   123     // We can have endTransfer just call startTransfer.

   124 

   125     Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer(env, jthis, jdroptarget, jformat);

   126 

   127     return;

   128 }

   129 

   130 /*

   131  * Class:     sun_lwawt_macosx_CDropTargetContextPeer

   132  * Method:    dropDone

   133  * Signature: (JJZZI)V

   134  */

   135 JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_dropDone

   136   (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jdroptransfer, jboolean jislocal, jboolean jsuccess, jint jdropaction)

   137 {

   138     // Get the drop target native object:

   139 JNF_COCOA_ENTER(env);

   140     CDropTarget* dropTarget = GetCDropTarget(jdroptarget);

   141     if (dropTarget == nil) {

   142         DLog2(@"[CDropTargetContextPeer dropDone]: GetCDropTarget failed for %d.\n", (NSInteger) jdroptarget);

   143         return;

   144     }

   145 

   146     // Notify drop target Java is all done with this dragging sequence:

   147     [dropTarget javaDraggingEnded:(jlong)jdroptransfer success:jsuccess action:jdropaction];

   148 JNF_COCOA_EXIT(env);

   149 

   150     return;

   151 }