third_party/WebKit/Source/web/DragClientImpl.cpp

   1 /*
   2  * Copyright (C) 2009 Google 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 are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "web/DragClientImpl.h"
  33
  34 #include "core/clipboard/DataObject.h"
  35 #include "core/clipboard/DataTransfer.h"
  36 #include "core/frame/LocalFrame.h"
  37 #include "platform/DragImage.h"
  38 #include "platform/geometry/IntSize.h"
  39 #include "public/platform/WebCommon.h"
  40 #include "public/platform/WebDragData.h"
  41 #include "public/platform/WebImage.h"
  42 #include "public/platform/WebPoint.h"
  43 #include "public/web/WebDragOperation.h"
  44 #include "public/web/WebViewClient.h"
  45 #include "web/WebViewImpl.h"
  46 #include "wtf/Assertions.h"
  47 #include "wtf/RefPtr.h"
  48
  49 namespace blink {
  50
  51 DragDestinationAction DragClientImpl::actionMaskForDrag(DragData*)
  52 {
  53     if (m_webView->client() && m_webView->client()->acceptsLoadDrops())
  54         return DragDestinationActionAny;
  55
  56     return static_cast<DragDestinationAction>(
  57         DragDestinationActionDHTML | DragDestinationActionEdit);
  58 }
  59
  60 void DragClientImpl::startDrag(DragImage* dragImage, const IntPoint& dragImageOrigin, const IntPoint& eventPos, DataTransfer* dataTransfer, LocalFrame* frame, bool isLinkDrag)
  61 {
  62     // Add a ref to the frame just in case a load occurs mid-drag.
  63     RefPtrWillBeRawPtr<LocalFrame> frameProtector(frame);
  64
  65     WebDragData dragData = dataTransfer->dataObject()->toWebDragData();
  66     WebDragOperationsMask dragOperationMask = static_cast<WebDragOperationsMask>(dataTransfer->sourceOperation());
  67     WebImage image;
  68     IntSize offsetSize(eventPos - dragImageOrigin);
  69     WebPoint offsetPoint(offsetSize.width(), offsetSize.height());
  70
  71     if (dragImage) {
  72         float resolutionScale = dragImage->resolutionScale();
  73         if (m_webView->deviceScaleFactor() != resolutionScale) {
  74             ASSERT(resolutionScale > 0);
  75             float scale = m_webView->deviceScaleFactor() / resolutionScale;
  76             dragImage->scale(scale, scale);
  77         }
  78         image = dragImage->bitmap();
  79     }
  80
  81     m_webView->startDragging(frame, dragData, dragOperationMask, image, offsetPoint);
  82 }
  83
  84 } // namespace blink