1/*
2 * Copyright (c) 2011, 2013, 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
35JNF_CLASS_CACHE(jc_CDropTargetContextPeer, "sun/lwawt/macosx/CDropTargetContextPeer");
36
37
38static 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
44static 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 */
61JNIEXPORT jlong JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer
62  (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jformat)
63{
64
65    jlong result = (jlong) 0L;
66
67    // Currently startTransfer and endTransfer are synchronous since [CDropTarget copyDraggingDataForFormat]
68    // works off a data copy and doesn't have to go to the native event thread to get the data.
69    // We can have endTransfer just call startTransfer.
70
71JNF_COCOA_ENTER(env);
72    // Get the drop target native object:
73    CDropTarget* dropTarget = GetCDropTarget(jdroptarget);
74    if (dropTarget == nil) {
75        DLog2(@"[CDropTargetContextPeer startTransfer]: GetCDropTarget failed for %d.\n", (NSInteger) jdroptarget);
76        TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);
77        return result;
78    }
79
80    JNF_MEMBER_CACHE(newDataMethod, jc_CDropTargetContextPeer, "newData", "(J[B)V");
81    if ((*env)->ExceptionOccurred(env) || !newDataMethod) {
82        DLog2(@"[CDropTargetContextPeer startTransfer]: couldn't get newData method for %d.\n", (NSInteger) jdroptarget);
83        TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);
84        return result;
85    }
86
87    // Get data from drop target:
88    jobject jdropdata = [dropTarget copyDraggingDataForFormat:jformat];
89    if (!jdropdata) {
90        DLog2(@"[CDropTargetContextPeer startTransfer]: copyDraggingDataForFormat failed for %d.\n", (NSInteger) jdroptarget);
91        TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);
92        return result;
93    }
94
95    // Pass the data to drop target:
96    @try {
97        JNFCallVoidMethod(env, jthis, newDataMethod, jformat, jdropdata); // AWT_THREADING Safe (!appKit)
98    } @catch (NSException *ex) {
99        DLog2(@"[CDropTargetContextPeer startTransfer]: exception in newData() for %d.\n", (NSInteger) jdroptarget);
100        JNFDeleteGlobalRef(env, jdropdata);
101        TransferFailed(env, jthis, jdroptarget, (jlong) 0L, jformat);
102        return result;
103    }
104
105    // if no error return dropTarget's draggingSequence
106    result = [dropTarget getDraggingSequenceNumber];
107JNF_COCOA_EXIT(env);
108
109    return result;
110}
111
112/*
113 * Class:     sun_lwawt_macosx_CDropTargetContextPeer
114 * Method:    addTransfer
115 * Signature: (JJJ)V
116 */
117JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_addTransfer
118  (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jdroptransfer, jlong jformat)
119{
120    // Currently startTransfer and endTransfer are synchronous since [CDropTarget copyDraggingDataForFormat]
121    // works off a data copy and doesn't have to go to the native event thread to get the data.
122    // We can have endTransfer just call startTransfer.
123
124    Java_sun_lwawt_macosx_CDropTargetContextPeer_startTransfer(env, jthis, jdroptarget, jformat);
125
126    return;
127}
128
129/*
130 * Class:     sun_lwawt_macosx_CDropTargetContextPeer
131 * Method:    dropDone
132 * Signature: (JJZZI)V
133 */
134JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTargetContextPeer_dropDone
135  (JNIEnv *env, jobject jthis, jlong jdroptarget, jlong jdroptransfer, jboolean jislocal, jboolean jsuccess, jint jdropaction)
136{
137    // Get the drop target native object:
138JNF_COCOA_ENTER(env);
139    CDropTarget* dropTarget = GetCDropTarget(jdroptarget);
140    if (dropTarget == nil) {
141        DLog2(@"[CDropTargetContextPeer dropDone]: GetCDropTarget failed for %d.\n", (NSInteger) jdroptarget);
142        return;
143    }
144
145    // Notify drop target Java is all done with this dragging sequence:
146    [dropTarget javaDraggingEnded:(jlong)jdroptransfer success:jsuccess action:jdropaction];
147JNF_COCOA_EXIT(env);
148
149    return;
150}
151