/*

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

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

 *

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

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

 * published by the Free Software Foundation.  Oracle designates this

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

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

 *

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

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

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

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

 * accompanied this code).

 *

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

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

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

 *

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

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

 * questions.

 */

#import "sun_lwawt_macosx_CDropTargetContextPeer.h"

#import <JavaNativeFoundation/JavaNativeFoundation.h>

#import "CDataTransferer.h"

#import "CDropTarget.h"

#import "DnDUtilities.h"

#import "ThreadUtilities.h"

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

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

    AWT_ASSERT_NOT_APPKIT_THREAD;

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

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

}

static CDropTarget* GetCDropTarget(jlong jdroptarget) {

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

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

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

        return dropTarget;

    }

    return nil;

}

/*

 * Class:     sun_lwawt_macosx_CDropTargetContextPeer

 * Method:    startTransfer

 * Signature: (JJ)J

 */

JNIEXPORT jlong JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer

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

{

    jlong result = (jlong) 0L;

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

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

    // We can have endTransfer just call startTransfer.

JNF_COCOA_ENTER(env);

    // Get the drop target native object:

    CDropTarget* dropTarget = GetCDropTarget(jdroptarget);

    if (dropTarget == nil) {

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

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

        return result;

    }

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

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

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

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

        return result;

    }

    // Get data from drop target:

    jobject jdropdata = [dropTarget copyDraggingDataForFormat:jformat];

    if (!jdropdata) {

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

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

        return result;

    }

    // Pass the data to drop target:

    @try {

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

    } @catch (NSException *ex) {

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

        JNFDeleteGlobalRef(env, jdropdata);

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

        return result;

    }

    // if no error return dropTarget's draggingSequence

    result = [dropTarget getDraggingSequenceNumber];

JNF_COCOA_EXIT(env);

    return result;

}

/*

 * Class:     sun_lwawt_macosx_CDropTargetContextPeer

 * Method:    addTransfer

 * Signature: (JJJ)V

 */

JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_addTransfer

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

{

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

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

    // We can have endTransfer just call startTransfer.

    Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer(env, jthis, jdroptarget, jformat);

    return;

}

/*

 * Class:     sun_lwawt_macosx_CDropTargetContextPeer

 * Method:    dropDone

 * Signature: (JJZZI)V

 */

JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_dropDone

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

{

    // Get the drop target native object:

JNF_COCOA_ENTER(env);

    CDropTarget* dropTarget = GetCDropTarget(jdroptarget);

    if (dropTarget == nil) {

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

        return;

    }

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

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

JNF_COCOA_EXIT(env);

    return;

}