static void vboxClipboardDestroy(PVBOXCLIPBOARDCONTEXT pCtx)
{
AssertPtrReturnVoid(pCtx);
if (pCtx->hwnd)
{
vboxClipboardRemoveFromCBChain(pCtx);
if (pCtx->timerRefresh)
KillTimer(pCtx->hwnd, 0);
DestroyWindow(pCtx->hwnd);
pCtx->hwnd = NULL;
}
if (pCtx->wndClass != 0)
{
UnregisterClass(s_szClipWndClassName, pCtx->pEnv->hInstance);
pCtx->wndClass = 0;
}
}
static LRESULT vboxClipboardProcessMsg(PVBOXCLIPBOARDCONTEXT pCtx, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
AssertPtr(pCtx);
LRESULT rc = 0;
switch (msg)
{
case WM_CLIPBOARDUPDATE:
{
Log(("WM_CLIPBOARDUPDATE\n"));
if (GetClipboardOwner() != hwnd)
{
/* Clipboard was updated by another application. */
vboxClipboardChanged(pCtx);
}
} break;
case WM_CHANGECBCHAIN:
{
if (vboxClipboardIsNewAPI(pCtx))
{
rc = DefWindowProc(hwnd, msg, wParam, lParam);
break;
}
HWND hwndRemoved = (HWND)wParam;
HWND hwndNext = (HWND)lParam;
LogFlowFunc(("WM_CHANGECBCHAIN: hwndRemoved %p, hwndNext %p, hwnd %p\n", hwndRemoved, hwndNext, pCtx->hwnd));
if (hwndRemoved == pCtx->hwndNextInChain)
{
/* The window that was next to our in the chain is being removed.
* Relink to the new next window. */
pCtx->hwndNextInChain = hwndNext;
}
else
{
if (pCtx->hwndNextInChain)
{
/* Pass the message further. */
DWORD_PTR dwResult;
rc = SendMessageTimeout(pCtx->hwndNextInChain, WM_CHANGECBCHAIN, wParam, lParam, 0, CBCHAIN_TIMEOUT, &dwResult);
if (!rc)
rc = (LRESULT) dwResult;
}
}
} break;
case WM_DRAWCLIPBOARD:
{
LogFlowFunc(("WM_DRAWCLIPBOARD, hwnd %p\n", pCtx->hwnd));
if (GetClipboardOwner() != hwnd)
{
/* Clipboard was updated by another application. */
/* WM_DRAWCLIPBOARD always expects a return code of 0, so don't change "rc" here. */
int vboxrc = vboxClipboardChanged(pCtx);
if (RT_FAILURE(vboxrc))
LogFlowFunc(("vboxClipboardChanged failed, rc = %Rrc\n", vboxrc));
}
if (pCtx->hwndNextInChain)
{
/* Pass the message to next windows in the clipboard chain. */
SendMessageTimeout(pCtx->hwndNextInChain, msg, wParam, lParam, 0, CBCHAIN_TIMEOUT, NULL);
}
} break;
case WM_TIMER:
{
if (vboxClipboardIsNewAPI(pCtx))
break;
HWND hViewer = GetClipboardViewer();
/* Re-register ourselves in the clipboard chain if our last ping
* timed out or there seems to be no valid chain. */
if (!hViewer || pCtx->fCBChainPingInProcess)
{
vboxClipboardRemoveFromCBChain(pCtx);
vboxClipboardAddToCBChain(pCtx);
}
/* Start a new ping by passing a dummy WM_CHANGECBCHAIN to be
* processed by ourselves to the chain. */
pCtx->fCBChainPingInProcess = TRUE;
hViewer = GetClipboardViewer();
if (hViewer)
SendMessageCallback(hViewer, WM_CHANGECBCHAIN, (WPARAM)pCtx->hwndNextInChain, (LPARAM)pCtx->hwndNextInChain, vboxClipboardChainPingProc, (ULONG_PTR)pCtx);
} break;
case WM_CLOSE:
{
/* Do nothing. Ignore the message. */
} break;
case WM_RENDERFORMAT:
{
/* Insert the requested clipboard format data into the clipboard. */
uint32_t u32Format = 0;
UINT format = (UINT)wParam;
LogFlowFunc(("WM_RENDERFORMAT, format = %x\n", format));
switch (format)
{
case CF_UNICODETEXT:
u32Format |= VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
break;
case CF_DIB:
u32Format |= VBOX_SHARED_CLIPBOARD_FMT_BITMAP;
break;
default:
if (format >= 0xC000)
{
TCHAR szFormatName[256];
int cActual = GetClipboardFormatName(format, szFormatName, sizeof(szFormatName)/sizeof (TCHAR));
if (cActual)
{
if (strcmp (szFormatName, "HTML Format") == 0)
{
u32Format |= VBOX_SHARED_CLIPBOARD_FMT_HTML;
}
}
}
break;
}
if (u32Format == 0)
{
/* Unsupported clipboard format is requested. */
LogFlowFunc(("Unsupported clipboard format requested: %ld\n", u32Format));
EmptyClipboard();
}
else
{
const uint32_t cbPrealloc = 4096; /** @todo r=andy Make it dynamic for supporting larger text buffers! */
uint32_t cb = 0;
/* Preallocate a buffer, most of small text transfers will fit into it. */
HANDLE hMem = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, cbPrealloc);
LogFlowFunc(("Preallocated handle hMem = %p\n", hMem));
if (hMem)
{
void *pMem = GlobalLock(hMem);
LogFlowFunc(("Locked pMem = %p, GlobalSize = %ld\n", pMem, GlobalSize(hMem)));
if (pMem)
{
/* Read the host data to the preallocated buffer. */
int vboxrc = VbglR3ClipboardReadData(pCtx->u32ClientID, u32Format, pMem, cbPrealloc, &cb);
LogFlowFunc(("VbglR3ClipboardReadData returned with rc = %Rrc\n", vboxrc));
if (RT_SUCCESS(vboxrc))
{
if (cb == 0)
{
/* 0 bytes returned means the clipboard is empty.
* Deallocate the memory and set hMem to NULL to get to
* the clipboard empty code path. */
GlobalUnlock(hMem);
GlobalFree(hMem);
hMem = NULL;
}
else if (cb > cbPrealloc)
{
GlobalUnlock(hMem);
/* The preallocated buffer is too small, adjust the size. */
hMem = GlobalReAlloc(hMem, cb, 0);
LogFlowFunc(("Reallocated hMem = %p\n", hMem));
if (hMem)
{
pMem = GlobalLock(hMem);
LogFlowFunc(("Locked pMem = %p, GlobalSize = %ld\n", pMem, GlobalSize(hMem)));
if (pMem)
{
/* Read the host data to the preallocated buffer. */
uint32_t cbNew = 0;
vboxrc = VbglR3ClipboardReadData(pCtx->u32ClientID, u32Format, pMem, cb, &cbNew);
LogFlowFunc(("VbglR3ClipboardReadData returned with rc = %Rrc, cb = %d, cbNew = %d\n", vboxrc, cb, cbNew));
if (RT_SUCCESS (vboxrc) && cbNew <= cb)
{
cb = cbNew;
}
else
{
GlobalUnlock(hMem);
GlobalFree(hMem);
hMem = NULL;
}
}
else
{
GlobalFree(hMem);
hMem = NULL;
}
}
}
if (hMem)
{
/* pMem is the address of the data. cb is the size of returned data. */
/* Verify the size of returned text, the memory block for clipboard
* must have the exact string size.
*/
if (u32Format == VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
{
size_t cbActual = 0;
HRESULT hrc = StringCbLengthW((LPWSTR)pMem, cb, &cbActual);
if (FAILED (hrc))
{
/* Discard invalid data. */
GlobalUnlock(hMem);
GlobalFree(hMem);
hMem = NULL;
}
else
{
/* cbActual is the number of bytes, excluding those used
* for the terminating null character.
*/
cb = (uint32_t)(cbActual + 2);
}
}
}
if (hMem)
{
GlobalUnlock(hMem);
hMem = GlobalReAlloc(hMem, cb, 0);
LogFlowFunc(("Reallocated hMem = %p\n", hMem));
if (hMem)
{
/* 'hMem' contains the host clipboard data.
* size is 'cb' and format is 'format'. */
HANDLE hClip = SetClipboardData(format, hMem);
LogFlowFunc(("WM_RENDERFORMAT hClip = %p\n", hClip));
if (hClip)
{
/* The hMem ownership has gone to the system. Finish the processing. */
break;
}
/* Cleanup follows. */
}
}
}
if (hMem)
GlobalUnlock(hMem);
}
if (hMem)
GlobalFree(hMem);
}
/* Something went wrong. */
EmptyClipboard();
}
} break;
case WM_RENDERALLFORMATS:
{
/* Do nothing. The clipboard formats will be unavailable now, because the
* windows is to be destroyed and therefore the guest side becomes inactive.
*/
int vboxrc = vboxOpenClipboard(hwnd);
if (RT_SUCCESS(vboxrc))
{
EmptyClipboard();
CloseClipboard();
}
else
{
LogFlowFunc(("WM_RENDERALLFORMATS: Failed to open clipboard! rc: %Rrc\n", vboxrc));
}
} break;
case WM_USER:
{
/* Announce available formats. Do not insert data, they will be inserted in WM_RENDER*. */
uint32_t u32Formats = (uint32_t)lParam;
int vboxrc = vboxOpenClipboard(hwnd);
if (RT_SUCCESS(vboxrc))
{
EmptyClipboard();
HANDLE hClip = NULL;
if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
{
LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT\n"));
hClip = SetClipboardData(CF_UNICODETEXT, NULL);
}
if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
{
LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_BITMAP\n"));
hClip = SetClipboardData(CF_DIB, NULL);
}
if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_HTML)
{
UINT format = RegisterClipboardFormat ("HTML Format");
LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_HTML 0x%04X\n", format));
if (format != 0)
{
hClip = SetClipboardData(format, NULL);
}
}
CloseClipboard();
LogFlowFunc(("WM_USER: hClip = %p, err = %ld\n", hClip, GetLastError ()));
}
else
{
LogFlowFunc(("WM_USER: Failed to open clipboard! error = %Rrc\n", vboxrc));
}
} break;
case WM_USER + 1:
{
/* Send data in the specified format to the host. */
uint32_t u32Formats = (uint32_t)lParam;
HANDLE hClip = NULL;
int vboxrc = vboxOpenClipboard(hwnd);
if (RT_SUCCESS(vboxrc))
{
if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
{
hClip = GetClipboardData(CF_DIB);
if (hClip != NULL)
{
LPVOID lp = GlobalLock(hClip);
if (lp != NULL)
{
LogFlowFunc(("WM_USER + 1: CF_DIB\n"));
vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_BITMAP,
lp, GlobalSize(hClip));
GlobalUnlock(hClip);
}
else
{
hClip = NULL;
}
}
}
else if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
{
hClip = GetClipboardData(CF_UNICODETEXT);
if (hClip != NULL)
{
LPWSTR uniString = (LPWSTR)GlobalLock(hClip);
if (uniString != NULL)
{
LogFlowFunc(("WM_USER + 1: CF_UNICODETEXT\n"));
vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT,
uniString, (lstrlenW(uniString) + 1) * 2);
GlobalUnlock(hClip);
}
else
{
hClip = NULL;
}
}
}
else if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_HTML)
{
UINT format = RegisterClipboardFormat ("HTML Format");
if (format != 0)
{
hClip = GetClipboardData(format);
if (hClip != NULL)
{
LPVOID lp = GlobalLock(hClip);
if (lp != NULL)
{
LogFlowFunc(("WM_USER + 1: CF_HTML\n"));
vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_HTML,
lp, GlobalSize(hClip));
GlobalUnlock(hClip);
}
else
{
hClip = NULL;
}
}
}
}
CloseClipboard();
}
else
{
LogFlowFunc(("WM_USER: Failed to open clipboard! rc: %Rrc\n", vboxrc));
}
if (hClip == NULL)
{
/* Requested clipboard format is not available, send empty data. */
VbglR3ClipboardWriteData(pCtx->u32ClientID, 0, NULL, 0);
}
} break;
case WM_DESTROY:
{
vboxClipboardRemoveFromCBChain(pCtx);
if (pCtx->timerRefresh)
KillTimer(pCtx->hwnd, 0);
/*
* don't need to call PostQuitMessage cause
* the VBoxTray already finished a message loop
*/
} break;
default:
{
rc = DefWindowProc(hwnd, msg, wParam, lParam);
}
}
#ifndef DEBUG_andy
LogFlowFunc(("vboxClipboardProcessMsg returned with rc = %ld\n", rc));
#endif
return rc;
}
