The Tor Browser: widget/windows/nsNativeDragTarget.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef _nsNativeDragTarget_h_

     6 #define _nsNativeDragTarget_h_

     8 #include "nsCOMPtr.h"

     9 #include "nsIDragSession.h"

    10 #include <ole2.h>

    11 #include <shlobj.h>

    13 #ifndef IDropTargetHelper

    14 #include <shobjidl.h> // Vista drag image interfaces

    15 #undef LogSeverity // SetupAPI.h #defines this as DWORD

    16 #endif

    18 #include "mozilla/Attributes.h"

    20 class nsIDragService;

    21 class nsIWidget;

    23 struct IDataObject;

    25 /*

    26  * nsNativeDragTarget implements the IDropTarget interface and gets most of its

    27  * behavior from the associated adapter (m_dragDrop).

    28  */

    30 class nsNativeDragTarget MOZ_FINAL : public IDropTarget

    31 {

    32 public:

    33   nsNativeDragTarget(nsIWidget * aWidget);

    34   ~nsNativeDragTarget();

    36   // IUnknown members - see iunknown.h for documentation

    37   STDMETHODIMP QueryInterface(REFIID, void**);

    38   STDMETHODIMP_(ULONG) AddRef();

    39   STDMETHODIMP_(ULONG) Release();

    41   // IDataTarget members

    43   // Set pEffect based on whether this object can support a drop based on

    44   // the data available from pSource, the key and mouse states specified

    45   // in grfKeyState, and the coordinates specified by point. This is

    46   // called by OLE when a drag enters this object's window (as registered

    47   // by Initialize).

    48   STDMETHODIMP DragEnter(LPDATAOBJECT pSource, DWORD grfKeyState,

    49                          POINTL point, DWORD* pEffect);

    51   // Similar to DragEnter except it is called frequently while the drag

    52   // is over this object's window.

    53   STDMETHODIMP DragOver(DWORD grfKeyState, POINTL point, DWORD* pEffect);

    55   // Release the drag-drop source and put internal state back to the point

    56   // before the call to DragEnter. This is called when the drag leaves

    57   // without a drop occurring.

    58   STDMETHODIMP DragLeave();

    60   // If point is within our region of interest and pSource's data supports

    61   // one of our formats, get the data and set pEffect according to

    62   // grfKeyState (DROPEFFECT_MOVE if the control key was not pressed,

    63   // DROPEFFECT_COPY if the control key was pressed). Otherwise return

    64   // E_FAIL.

    65   STDMETHODIMP Drop(LPDATAOBJECT pSource, DWORD grfKeyState,

    66                     POINTL point, DWORD* pEffect);

    67   /**

    68    * Cancel the current drag session, if any.

    69    */

    70   void DragCancel();

    72 protected:

    74   void GetGeckoDragAction(DWORD grfKeyState, LPDWORD pdwEffect,

    75                           uint32_t * aGeckoAction);

    76   void ProcessDrag(uint32_t aEventType, DWORD grfKeyState,

    77                    POINTL pt, DWORD* pdwEffect);

    78   void DispatchDragDropEvent(uint32_t aType, POINTL pt);

    79   void AddLinkSupportIfCanBeGenerated(LPDATAOBJECT aIDataSource);

    81   // Native Stuff

    82   ULONG            m_cRef;      // reference count

    83   HWND             mHWnd;

    84   DWORD            mEffectsAllowed;

    85   DWORD            mEffectsPreferred;

    86   bool             mTookOwnRef;

    88   // Gecko Stuff

    89   nsIWidget      * mWidget;

    90   nsIDragService * mDragService;

    91   // Drag target helper

    92   IDropTargetHelper * GetDropTargetHelper();

    95 private:

    96   // Drag target helper

    97   IDropTargetHelper * mDropTargetHelper;

    98 };

   100 #endif // _nsNativeDragTarget_h_

The Tor Browser / file revision