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      1 /*
      2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
      3  * Copyright (C) 2008 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "DragController.h"
     29 
     30 #include "DragData.h"
     31 #include "SelectionController.h"
     32 #include <wtf/RefPtr.h>
     33 
     34 #if OS(WINDOWS)
     35 #include <windows.h>
     36 #endif
     37 
     38 namespace WebCore {
     39 
     40 const int DragController::LinkDragBorderInset = 2;
     41 const int DragController::MaxOriginalImageArea = 1500 * 1500;
     42 const int DragController::DragIconRightInset = 7;
     43 const int DragController::DragIconBottomInset = 3;
     44 
     45 const float DragController::DragImageAlpha = 0.75f;
     46 
     47 DragOperation DragController::dragOperation(DragData* dragData)
     48 {
     49     // FIXME: To match the MacOS behaviour we should return DragOperationNone
     50     // if we are a modal window, we are the drag source, or the window is an
     51     // attached sheet If this can be determined from within WebCore
     52     // operationForDrag can be pulled into WebCore itself
     53     ASSERT(dragData);
     54     return dragData->containsURL(0) && !m_didInitiateDrag ? DragOperationCopy : DragOperationNone;
     55 }
     56 
     57 bool DragController::isCopyKeyDown(DragData*)
     58 {
     59     // FIXME: This should not be OS specific.  Delegate to the embedder instead.
     60 #if OS(WINDOWS)
     61     return ::GetAsyncKeyState(VK_CONTROL);
     62 #else
     63     return false;
     64 #endif
     65 }
     66 
     67 const IntSize& DragController::maxDragImageSize()
     68 {
     69 #if OS(DARWIN)
     70     // Match Safari's drag image size.
     71     static const IntSize maxDragImageSize(400, 400);
     72 #else
     73     static const IntSize maxDragImageSize(200, 200);
     74 #endif
     75     return maxDragImageSize;
     76 }
     77 
     78 void DragController::cleanupAfterSystemDrag()
     79 {
     80 }
     81 
     82 } // namespace WebCore
     83