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ole32: Add a function to return (and possibly create) the clipboard's window.

This commit is contained in:
Huw Davies 2009-04-16 12:09:04 +01:00 committed by Alexandre Julliard
parent 6ce9922f3d
commit 6526b570e1
1 changed files with 32 additions and 27 deletions
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59
dlls/ole32/clipboard.c
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@ -134,7 +134,7 @@ typedef struct ole_clipbrd
LONG ref;
HWND hWndClipboard; /* Hidden clipboard window */
HWND window; /* Hidden clipboard window */
IDataObject *pIDataObjectSrc; /* Source object passed to OleSetClipboard */
ole_priv_data *cached_enum; /* Cached result from the enumeration of src data object */
} ole_clipbrd;
@ -809,10 +809,10 @@ static ULONG WINAPI OLEClipbrd_IDataObject_AddRef(
}
/***********************************************************************
* OLEClipbrd_DestroyWindow(HWND)
* destroy_clipbrd_window
* Destroy the clipboard window and unregister its class
*/
static void OLEClipbrd_DestroyWindow(HWND hwnd)
static void destroy_clipbrd_window(HWND hwnd)
{
static const WCHAR ole32W[] = {'o','l','e','3','2',0};
HINSTANCE hinst = GetModuleHandleW(ole32W);
@ -827,8 +827,7 @@ static void OLEClipbrd_Destroy(ole_clipbrd* This)
if (!This) return;
if ( This->hWndClipboard )
OLEClipbrd_DestroyWindow(This->hWndClipboard);
if ( This->window ) destroy_clipbrd_window(This->window);
HeapFree(GetProcessHeap(), 0, This);
}
@ -903,7 +902,7 @@ static HRESULT WINAPI OLEClipbrd_IDataObject_GetData(
/*
* Otherwise, get the data from the windows clipboard using GetClipboardData
*/
if ( !OpenClipboard(theOleClipboard->hWndClipboard)) return CLIPBRD_E_CANT_OPEN;
if ( !OpenClipboard(theOleClipboard->window)) return CLIPBRD_E_CANT_OPEN;
h = GetClipboardData(pformatetcIn->cfFormat);
hr = dup_global_mem(h, GMEM_MOVEABLE, &hData);
@ -1016,7 +1015,7 @@ static HRESULT WINAPI OLEClipbrd_IDataObject_EnumFormatEtc(
*enum_fmt = NULL;
if ( dwDirection != DATADIR_GET ) return E_NOTIMPL;
if ( !OpenClipboard(This->hWndClipboard) ) return CLIPBRD_E_CANT_OPEN;
if ( !OpenClipboard(This->window) ) return CLIPBRD_E_CANT_OPEN;
handle = GetClipboardData( ole_priv_data_clipboard_format );
if(handle)
@ -1128,7 +1127,7 @@ static ole_clipbrd* OLEClipbrd_Construct(void)
This->lpvtbl = &OLEClipbrd_IDataObject_VTable;
This->ref = 1;
This->hWndClipboard = NULL;
This->window = NULL;
This->pIDataObjectSrc = NULL;
This->cached_enum = NULL;
@ -1279,6 +1278,20 @@ static HRESULT set_clipboard_formats(ole_clipbrd *clipbrd, IDataObject *data)
return S_OK;
}
static HWND create_clipbrd_window(void);
/***********************************************************************
* get_clipbrd_window
*/
static inline HRESULT get_clipbrd_window(ole_clipbrd *clipbrd, HWND *wnd)
{
if ( !clipbrd->window )
clipbrd->window = create_clipbrd_window();
*wnd = clipbrd->window;
return *wnd ? S_OK : E_FAIL;
}
/***********************************************************************
* set_src_dataobject
*
@ -1362,10 +1375,9 @@ static LRESULT CALLBACK clipbrd_wndproc(HWND hwnd, UINT message, WPARAM wparam,
/***********************************************************************
* OLEClipbrd_CreateWindow()
* Create the clipboard window
* create_clipbrd_window
*/
static HWND OLEClipbrd_CreateWindow(void)
static HWND create_clipbrd_window(void)
{
WNDCLASSEXW class;
static const WCHAR ole32W[] = {'o','l','e','3','2',0};
@ -1440,24 +1452,16 @@ HRESULT WINAPI OleSetClipboard(IDataObject* data)
{
HRESULT hr;
ole_clipbrd *clipbrd;
HWND wnd;
TRACE("(%p)\n", data);
if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr;
/*
* If the Ole clipboard window hasn't been created yet, create it now.
*/
if ( !clipbrd->hWndClipboard )
clipbrd->hWndClipboard = OLEClipbrd_CreateWindow();
if ( !clipbrd->hWndClipboard ) return E_FAIL;
if(FAILED(hr = get_clipbrd_window(clipbrd, &wnd))) return hr;
if ( !OpenClipboard(clipbrd->hWndClipboard) ) return CLIPBRD_E_CANT_OPEN;
if ( !OpenClipboard(wnd) ) return CLIPBRD_E_CANT_OPEN;
/*
* Empty the current clipboard and make our window the clipboard owner
* NOTE: This will trigger a WM_DESTROYCLIPBOARD message
*/
if ( !EmptyClipboard() )
{
hr = CLIPBRD_E_CANT_EMPTY;
@ -1467,7 +1471,7 @@ HRESULT WINAPI OleSetClipboard(IDataObject* data)
hr = set_src_dataobject(clipbrd, data);
if(FAILED(hr)) goto end;
hr = set_dataobject_format(clipbrd->hWndClipboard);
hr = set_dataobject_format(wnd);
end:
@ -1516,19 +1520,20 @@ HRESULT WINAPI OleFlushClipboard(void)
FORMATETC rgelt;
HRESULT hr;
ole_clipbrd *clipbrd;
HWND wnd;
TRACE("()\n");
if(FAILED(hr = get_ole_clipbrd(&clipbrd))) return hr;
if(FAILED(hr = get_clipbrd_window(clipbrd, &wnd))) return hr;
/*
* Already flushed or no source DataObject? Nothing to do.
*/
if (!clipbrd->pIDataObjectSrc)
return S_OK;
if (!clipbrd->pIDataObjectSrc) return S_OK;
if (!OpenClipboard(clipbrd->hWndClipboard))
return CLIPBRD_E_CANT_OPEN;
if (!OpenClipboard(wnd)) return CLIPBRD_E_CANT_OPEN;
/*
* Render all HGLOBAL formats supported by the source into