1 /*
2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "Clipboard.h"
28
29 #include "CachedImage.h"
30 #include "DOMImplementation.h"
31 #include "Frame.h"
32 #include "FrameLoader.h"
33 #include "Image.h"
34
35 namespace WebCore {
36
Clipboard(ClipboardAccessPolicy policy,bool isForDragging)37 Clipboard::Clipboard(ClipboardAccessPolicy policy, bool isForDragging)
38 : m_policy(policy)
39 , m_dropEffect("none")
40 , m_effectAllowed("uninitialized")
41 , m_dragStarted(false)
42 , m_forDragging(isForDragging)
43 , m_dragImage(0)
44 {
45 }
46
setAccessPolicy(ClipboardAccessPolicy policy)47 void Clipboard::setAccessPolicy(ClipboardAccessPolicy policy)
48 {
49 // once you go numb, can never go back
50 ASSERT(m_policy != ClipboardNumb || policy == ClipboardNumb);
51 m_policy = policy;
52 }
53
54 // These "conversion" methods are called by both WebCore and WebKit, and never make sense to JS, so we don't
55 // worry about security for these. They don't allow access to the pasteboard anyway.
56
dragOpFromIEOp(const String & op)57 static DragOperation dragOpFromIEOp(const String& op)
58 {
59 // yep, it's really just this fixed set
60 if (op == "uninitialized")
61 return DragOperationEvery;
62 if (op == "none")
63 return DragOperationNone;
64 if (op == "copy")
65 return DragOperationCopy;
66 if (op == "link")
67 return DragOperationLink;
68 if (op == "move")
69 return DragOperationGeneric; // FIXME: Why is this DragOperationGeneric? <http://webkit.org/b/33697>
70 if (op == "copyLink")
71 return (DragOperation)(DragOperationCopy | DragOperationLink);
72 if (op == "copyMove")
73 return (DragOperation)(DragOperationCopy | DragOperationGeneric | DragOperationMove);
74 if (op == "linkMove")
75 return (DragOperation)(DragOperationLink | DragOperationGeneric | DragOperationMove);
76 if (op == "all")
77 return DragOperationEvery;
78 return DragOperationPrivate; // really a marker for "no conversion"
79 }
80
IEOpFromDragOp(DragOperation op)81 static String IEOpFromDragOp(DragOperation op)
82 {
83 bool moveSet = !!((DragOperationGeneric | DragOperationMove) & op);
84
85 if ((moveSet && (op & DragOperationCopy) && (op & DragOperationLink))
86 || (op == DragOperationEvery))
87 return "all";
88 if (moveSet && (op & DragOperationCopy))
89 return "copyMove";
90 if (moveSet && (op & DragOperationLink))
91 return "linkMove";
92 if ((op & DragOperationCopy) && (op & DragOperationLink))
93 return "copyLink";
94 if (moveSet)
95 return "move";
96 if (op & DragOperationCopy)
97 return "copy";
98 if (op & DragOperationLink)
99 return "link";
100 return "none";
101 }
102
sourceOperation() const103 DragOperation Clipboard::sourceOperation() const
104 {
105 DragOperation op = dragOpFromIEOp(m_effectAllowed);
106 ASSERT(op != DragOperationPrivate);
107 return op;
108 }
109
destinationOperation() const110 DragOperation Clipboard::destinationOperation() const
111 {
112 DragOperation op = dragOpFromIEOp(m_dropEffect);
113 ASSERT(op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == DragOperationGeneric || op == DragOperationMove);
114 return op;
115 }
116
setSourceOperation(DragOperation op)117 void Clipboard::setSourceOperation(DragOperation op)
118 {
119 ASSERT_ARG(op, op != DragOperationPrivate);
120 m_effectAllowed = IEOpFromDragOp(op);
121 }
122
setDestinationOperation(DragOperation op)123 void Clipboard::setDestinationOperation(DragOperation op)
124 {
125 ASSERT_ARG(op, op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == DragOperationGeneric || op == DragOperationMove);
126 m_dropEffect = IEOpFromDragOp(op);
127 }
128
setDropEffect(const String & effect)129 void Clipboard::setDropEffect(const String &effect)
130 {
131 if (!m_forDragging)
132 return;
133
134 // The attribute must ignore any attempts to set it to a value other than none, copy, link, and move.
135 if (effect != "none" && effect != "copy" && effect != "link" && effect != "move")
136 return;
137
138 if (m_policy == ClipboardReadable || m_policy == ClipboardTypesReadable)
139 m_dropEffect = effect;
140 }
141
setEffectAllowed(const String & effect)142 void Clipboard::setEffectAllowed(const String &effect)
143 {
144 if (!m_forDragging)
145 return;
146
147 if (dragOpFromIEOp(effect) == DragOperationPrivate) {
148 // This means that there was no conversion, and the effectAllowed that
149 // we are passed isn't a valid effectAllowed, so we should ignore it,
150 // and not set m_effectAllowed.
151
152 // The attribute must ignore any attempts to set it to a value other than
153 // none, copy, copyLink, copyMove, link, linkMove, move, all, and uninitialized.
154 return;
155 }
156
157
158 if (m_policy == ClipboardWritable)
159 m_effectAllowed = effect;
160 }
161
162 } // namespace WebCore
163