Source/web/DragClientImpl.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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#include "config.h"
#include "DragClientImpl.h"
#include "WebViewClient.h"
#include "WebViewImpl.h"
#include "core/dom/Clipboard.h"
#include "core/frame/Frame.h"
#include "core/platform/DragImage.h"
#include "core/platform/chromium/ChromiumDataObject.h"
#include "core/platform/graphics/skia/NativeImageSkia.h"
#include "platform/geometry/IntSize.h"
#include "public/platform/WebCommon.h"
#include "public/platform/WebDragData.h"
#include "public/platform/WebImage.h"
#include "public/platform/WebPoint.h"
#include "public/web/WebDragOperation.h"
#include "wtf/Assertions.h"
#include "wtf/RefPtr.h"

using namespace WebCore;

namespace blink {

DragDestinationAction DragClientImpl::actionMaskForDrag(DragData*)
{
    if (m_webView->client() && m_webView->client()->acceptsLoadDrops())
        return DragDestinationActionAny;

    return static_cast<DragDestinationAction>(
        DragDestinationActionDHTML | DragDestinationActionEdit);
}

void DragClientImpl::startDrag(DragImage* dragImage,
                               const IntPoint& dragImageOrigin,
                               const IntPoint& eventPos,
                               Clipboard* clipboard,
                               Frame* frame,
                               bool isLinkDrag)
{
    // Add a ref to the frame just in case a load occurs mid-drag.
    RefPtr<Frame> frameProtector = frame;

    WebDragData dragData = clipboard->dataObject();
    WebDragOperationsMask dragOperationMask = static_cast<WebDragOperationsMask>(clipboard->sourceOperation());
    WebImage image;
    IntSize offsetSize(eventPos - dragImageOrigin);
    WebPoint offsetPoint(offsetSize.width(), offsetSize.height());

    if (dragImage) {
        float resolutionScale = dragImage->resolutionScale();
        if (m_webView->deviceScaleFactor() != resolutionScale) {
            ASSERT(resolutionScale > 0);
            float scale = m_webView->deviceScaleFactor() / resolutionScale;
            dragImage->scale(scale, scale);
        }
        image = dragImage->bitmap();
    }

    m_webView->startDragging(frame, dragData, dragOperationMask, image, offsetPoint);
}

} // namespace blink