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 "DOMImplementation.h"
30 #include "Frame.h"
31 #include "FrameLoader.h"
32 #include "Image.h"
33
34 namespace WebCore {
35
Clipboard(ClipboardAccessPolicy policy,bool isForDragging)36 Clipboard::Clipboard(ClipboardAccessPolicy policy, bool isForDragging)
37 : m_policy(policy)
38 , m_dragStarted(false)
39 , m_forDragging(isForDragging)
40 , m_dragImage(0)
41 {
42 }
43
setAccessPolicy(ClipboardAccessPolicy policy)44 void Clipboard::setAccessPolicy(ClipboardAccessPolicy policy)
45 {
46 // once you go numb, can never go back
47 ASSERT(m_policy != ClipboardNumb || policy == ClipboardNumb);
48 m_policy = policy;
49 }
50
51 // These "conversion" methods are called by both WebCore and WebKit, and never make sense to JS, so we don't
52 // worry about security for these. They don't allow access to the pasteboard anyway.
53
dragOpFromIEOp(const String & op)54 static DragOperation dragOpFromIEOp(const String& op)
55 {
56 // yep, it's really just this fixed set
57 if (op == "none")
58 return DragOperationNone;
59 if (op == "copy")
60 return DragOperationCopy;
61 if (op == "link")
62 return DragOperationLink;
63 if (op == "move")
64 return DragOperationGeneric;
65 if (op == "copyLink")
66 return (DragOperation)(DragOperationCopy | DragOperationLink);
67 if (op == "copyMove")
68 return (DragOperation)(DragOperationCopy | DragOperationGeneric | DragOperationMove);
69 if (op == "linkMove")
70 return (DragOperation)(DragOperationLink | DragOperationGeneric | DragOperationMove);
71 if (op == "all")
72 return DragOperationEvery;
73 return DragOperationPrivate; // really a marker for "no conversion"
74 }
75
IEOpFromDragOp(DragOperation op)76 static String IEOpFromDragOp(DragOperation op)
77 {
78 bool moveSet = !!((DragOperationGeneric | DragOperationMove) & op);
79
80 if ((moveSet && (op & DragOperationCopy) && (op & DragOperationLink))
81 || (op == DragOperationEvery))
82 return "all";
83 if (moveSet && (op & DragOperationCopy))
84 return "copyMove";
85 if (moveSet && (op & DragOperationLink))
86 return "linkMove";
87 if ((op & DragOperationCopy) && (op & DragOperationLink))
88 return "copyLink";
89 if (moveSet)
90 return "move";
91 if (op & DragOperationCopy)
92 return "copy";
93 if (op & DragOperationLink)
94 return "link";
95 return "none";
96 }
97
sourceOperation(DragOperation & op) const98 bool Clipboard::sourceOperation(DragOperation& op) const
99 {
100 if (m_effectAllowed.isNull())
101 return false;
102 op = dragOpFromIEOp(m_effectAllowed);
103 return true;
104 }
105
destinationOperation(DragOperation & op) const106 bool Clipboard::destinationOperation(DragOperation& op) const
107 {
108 if (m_dropEffect.isNull())
109 return false;
110 op = dragOpFromIEOp(m_dropEffect);
111 return true;
112 }
113
setSourceOperation(DragOperation op)114 void Clipboard::setSourceOperation(DragOperation op)
115 {
116 m_effectAllowed = IEOpFromDragOp(op);
117 }
118
setDestinationOperation(DragOperation op)119 void Clipboard::setDestinationOperation(DragOperation op)
120 {
121 m_dropEffect = IEOpFromDragOp(op);
122 }
123
setDropEffect(const String & effect)124 void Clipboard::setDropEffect(const String &effect)
125 {
126 if (!m_forDragging)
127 return;
128
129 if (m_policy == ClipboardReadable || m_policy == ClipboardTypesReadable)
130 m_dropEffect = effect;
131 }
132
setEffectAllowed(const String & effect)133 void Clipboard::setEffectAllowed(const String &effect)
134 {
135 if (!m_forDragging)
136 return;
137
138 if (m_policy == ClipboardWritable)
139 m_effectAllowed = effect;
140 }
141
142 } // namespace WebCore
143