Reviewed by Andreas Kling.

        [Qt] [WK2] Add drag and drop support
        https://bugs.webkit.org/show_bug.cgi?id=62838

        Add convenience methods to allow encoding/decoding of DragData.
        Move the call to dragEnded() to DragClient, to make WebKit1 and WebKit2
        consistent.

        * page/qt/DragControllerQt.cpp:
        (WebCore::DragController::cleanupAfterSystemDrag):
        * platform/DragData.h:
        (WebCore::DragData::flags):
        (WebCore::DragData::DragData):
        (WebCore::DragData::operator =):
2011-06-23  Yael Aharon  <yael.aharon@nokia.com>

        Reviewed by Andreas Kling.

        [Qt] [WK2] Add drag and drop support
        https://bugs.webkit.org/show_bug.cgi?id=62838

        Call dragEnded from the DragClient to make WebKit1 and WebKit2 consistent.

        * WebCoreSupport/DragClientQt.cpp:
        (WebCore::DragClientQt::startDrag):
2011-06-23  Yael Aharon  <yael.aharon@nokia.com>

        Reviewed by Andreas Kling.

        [Qt] [WK2] Add drag and drop support
        https://bugs.webkit.org/show_bug.cgi?id=62838

        Added missing pieces to add support for DnD in QtWebKit.

        * Shared/qt/ArgumentCodersQt.cpp: Added.
        (CoreIPC::::encode):
        (CoreIPC::::decode):
        * Shared/qt/ArgumentCodersQt.h: Added.
        Encode DragData so that we can transfer the QMimeData between the
        WebProcess and the UI Process.
        I encode the DragData and not QMimeData directly because we don't
        have an associated QMimeData for each message.

        * UIProcess/API/qt/qgraphicswkview.cpp:
        (QGraphicsWKView::init):
        (QGraphicsWKView::dragEnterEvent):
        (QGraphicsWKView::dragLeaveEvent):
        (QGraphicsWKView::dragMoveEvent):
        (QGraphicsWKView::dropEvent):
        * UIProcess/API/qt/qgraphicswkview.h:
        * UIProcess/API/qt/qwkpage.cpp:
        (dropActionToDragOperation):
        (dragOperationToDropAction):
        (dragOperationToDropActions):
        (QWKPagePrivate::dragEnterEvent):
        (QWKPagePrivate::dragLeaveEvent):
        (QWKPagePrivate::dragMoveEvent):
        (QWKPagePrivate::dropEvent):
        (QWKPagePrivate::startDrag):

        Send drag-and-drop related events to WebKit.

        * UIProcess/API/qt/qwkpage_p.h:
        * UIProcess/PageClient.h:
        * UIProcess/WebPageProxy.cpp:
        (WebKit::WebPageProxy::performDragControllerAction):
        (WebKit::WebPageProxy::startDrag):
        * UIProcess/WebPageProxy.h:

         Start the HTML5 drag operation from the UI process, because QDrag
         needs a handle to the QWidget under the mouse.

        * UIProcess/WebPageProxy.messages.in:

        Add message type that takes DragData as a parameter.

        * WebKit2.pro:
        * WebProcess/WebCoreSupport/WebDragClient.cpp:
        * WebProcess/WebCoreSupport/qt/WebDragClientQt.cpp: Added.
        (WebKit::convertImageToBitmap):
        (WebKit::WebDragClient::startDrag):

        Send a message to the UI process to start the HTML5 drag operation.

        * WebProcess/WebPage/WebPage.cpp:
        (WebKit::WebPage::performDragControllerAction):
        * WebProcess/WebPage/WebPage.h:
        * WebProcess/WebPage/WebPage.messages.in:

        Add message type that takes DragData as a parameter.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@89582 268f45cc-cd09-0410-ab3c-d52691b4dbfc