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 "Frame.h" 31#include "FrameLoader.h" 32#include "Image.h" 33 34namespace WebCore { 35 36Clipboard::Clipboard(ClipboardAccessPolicy policy, ClipboardType clipboardType) 37 : m_policy(policy) 38 , m_dropEffect("uninitialized") 39 , m_effectAllowed("uninitialized") 40 , m_dragStarted(false) 41 , m_clipboardType(clipboardType) 42 , m_dragImage(0) 43{ 44} 45 46void Clipboard::setAccessPolicy(ClipboardAccessPolicy policy) 47{ 48 // once you go numb, can never go back 49 ASSERT(m_policy != ClipboardNumb || policy == ClipboardNumb); 50 m_policy = policy; 51} 52 53// These "conversion" methods are called by both WebCore and WebKit, and never make sense to JS, so we don't 54// worry about security for these. They don't allow access to the pasteboard anyway. 55 56static DragOperation dragOpFromIEOp(const String& op) 57{ 58 // yep, it's really just this fixed set 59 if (op == "uninitialized") 60 return DragOperationEvery; 61 if (op == "none") 62 return DragOperationNone; 63 if (op == "copy") 64 return DragOperationCopy; 65 if (op == "link") 66 return DragOperationLink; 67 if (op == "move") 68 return (DragOperation)(DragOperationGeneric | DragOperationMove); 69 if (op == "copyLink") 70 return (DragOperation)(DragOperationCopy | DragOperationLink); 71 if (op == "copyMove") 72 return (DragOperation)(DragOperationCopy | DragOperationGeneric | DragOperationMove); 73 if (op == "linkMove") 74 return (DragOperation)(DragOperationLink | DragOperationGeneric | DragOperationMove); 75 if (op == "all") 76 return DragOperationEvery; 77 return DragOperationPrivate; // really a marker for "no conversion" 78} 79 80static String IEOpFromDragOp(DragOperation op) 81{ 82 bool moveSet = !!((DragOperationGeneric | DragOperationMove) & op); 83 84 if ((moveSet && (op & DragOperationCopy) && (op & DragOperationLink)) 85 || (op == DragOperationEvery)) 86 return "all"; 87 if (moveSet && (op & DragOperationCopy)) 88 return "copyMove"; 89 if (moveSet && (op & DragOperationLink)) 90 return "linkMove"; 91 if ((op & DragOperationCopy) && (op & DragOperationLink)) 92 return "copyLink"; 93 if (moveSet) 94 return "move"; 95 if (op & DragOperationCopy) 96 return "copy"; 97 if (op & DragOperationLink) 98 return "link"; 99 return "none"; 100} 101 102DragOperation Clipboard::sourceOperation() const 103{ 104 DragOperation op = dragOpFromIEOp(m_effectAllowed); 105 ASSERT(op != DragOperationPrivate); 106 return op; 107} 108 109DragOperation Clipboard::destinationOperation() const 110{ 111 DragOperation op = dragOpFromIEOp(m_dropEffect); 112 ASSERT(op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == (DragOperation)(DragOperationGeneric | DragOperationMove) || op == DragOperationEvery); 113 return op; 114} 115 116void Clipboard::setSourceOperation(DragOperation op) 117{ 118 ASSERT_ARG(op, op != DragOperationPrivate); 119 m_effectAllowed = IEOpFromDragOp(op); 120} 121 122void Clipboard::setDestinationOperation(DragOperation op) 123{ 124 ASSERT_ARG(op, op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == DragOperationGeneric || op == DragOperationMove || op == (DragOperation)(DragOperationGeneric | DragOperationMove)); 125 m_dropEffect = IEOpFromDragOp(op); 126} 127 128void Clipboard::setDropEffect(const String &effect) 129{ 130 if (!isForDragAndDrop()) 131 return; 132 133 // The attribute must ignore any attempts to set it to a value other than none, copy, link, and move. 134 if (effect != "none" && effect != "copy" && effect != "link" && effect != "move") 135 return; 136 137 if (m_policy == ClipboardReadable || m_policy == ClipboardTypesReadable) 138 m_dropEffect = effect; 139} 140 141void Clipboard::setEffectAllowed(const String &effect) 142{ 143 if (!isForDragAndDrop()) 144 return; 145 146 if (dragOpFromIEOp(effect) == DragOperationPrivate) { 147 // This means that there was no conversion, and the effectAllowed that 148 // we are passed isn't a valid effectAllowed, so we should ignore it, 149 // and not set m_effectAllowed. 150 151 // The attribute must ignore any attempts to set it to a value other than 152 // none, copy, copyLink, copyMove, link, linkMove, move, all, and uninitialized. 153 return; 154 } 155 156 157 if (m_policy == ClipboardWritable) 158 m_effectAllowed = effect; 159} 160 161} // namespace WebCore 162