/* $Id: VBoxDnD.cpp 62679 2016-07-29 12:52:10Z vboxsync $ */ /** @file * VBoxDnD.cpp - Windows-specific bits of the drag and drop service. */ /* * Copyright (C) 2013-2016 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ #include #include "VBoxTray.h" #include "VBoxHelpers.h" #include "VBoxDnD.h" #include #include "VBox/HostServices/DragAndDropSvc.h" using namespace DragAndDropSvc; #include #include #include #include #include #include #include #include #include #ifdef LOG_GROUP # undef LOG_GROUP #endif #define LOG_GROUP LOG_GROUP_GUEST_DND #include /* Enable this define to see the proxy window(s) when debugging * their behavior. Don't have this enabled in release builds! */ #ifdef DEBUG //# define VBOX_DND_DEBUG_WND #endif /** The drag and drop window's window class. */ #define VBOX_DND_WND_CLASS "VBoxTrayDnDWnd" /** @todo Merge this with messages from VBoxTray.h. */ #define WM_VBOXTRAY_DND_MESSAGE WM_APP + 401 /** Function pointer for SendInput(). This only is available starting * at NT4 SP3+. */ typedef BOOL (WINAPI *PFNSENDINPUT)(UINT, LPINPUT, int); typedef BOOL (WINAPI* PFNENUMDISPLAYMONITORS)(HDC, LPCRECT, MONITORENUMPROC, LPARAM); /** Static pointer to SendInput() function. */ static PFNSENDINPUT s_pfnSendInput = NULL; static PFNENUMDISPLAYMONITORS s_pfnEnumDisplayMonitors = NULL; static LRESULT CALLBACK vboxDnDWndProcInstance(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); static LRESULT CALLBACK vboxDnDWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); static VBOXDNDCONTEXT g_Ctx = { 0 }; VBoxDnDWnd::VBoxDnDWnd(void) : hThread(NIL_RTTHREAD), mEventSem(NIL_RTSEMEVENT), hWnd(NULL), uAllActions(DND_IGNORE_ACTION), mfMouseButtonDown(false), #ifdef VBOX_WITH_DRAG_AND_DROP_GH pDropTarget(NULL), #endif mMode(Unknown), mState(Uninitialized) { RT_ZERO(startupInfo); LogFlowFunc(("Supported formats:\n")); const RTCString arrEntries[] = { VBOX_DND_FORMATS_DEFAULT }; for (size_t i = 0; i < RT_ELEMENTS(arrEntries); i++) { LogFlowFunc(("\t%s\n", arrEntries[i].c_str())); this->lstFmtSup.append(arrEntries[i]); } } VBoxDnDWnd::~VBoxDnDWnd(void) { Destroy(); } /** * Initializes the proxy window with a given DnD context. * * @return IPRT status code. * @param pContext Pointer to context to use. */ int VBoxDnDWnd::Initialize(PVBOXDNDCONTEXT pCtx) { AssertPtrReturn(pCtx, VERR_INVALID_POINTER); /* Save the context. */ this->pCtx = pCtx; int rc = RTSemEventCreate(&mEventSem); if (RT_SUCCESS(rc)) rc = RTCritSectInit(&mCritSect); if (RT_SUCCESS(rc)) { /* Message pump thread for our proxy window. */ rc = RTThreadCreate(&hThread, VBoxDnDWnd::Thread, this, 0, RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE, "dndwnd"); /** @todo Include ID if there's more than one proxy window. */ if (RT_SUCCESS(rc)) rc = RTThreadUserWait(hThread, 30 * 1000 /* Timeout in ms */); } if (RT_FAILURE(rc)) LogRel(("DnD: Failed to initialize proxy window, rc=%Rrc\n", rc)); LogFlowThisFunc(("Returning rc=%Rrc\n", rc)); return rc; } /** * Destroys the proxy window and releases all remaining * resources again. */ void VBoxDnDWnd::Destroy(void) { if (hThread != NIL_RTTHREAD) { int rcThread = VERR_WRONG_ORDER; int rc = RTThreadWait(hThread, 60 * 1000 /* Timeout in ms */, &rcThread); LogFlowFunc(("Waiting for thread resulted in %Rrc (thread exited with %Rrc)\n", rc, rcThread)); } reset(); RTCritSectDelete(&mCritSect); if (mEventSem != NIL_RTSEMEVENT) { RTSemEventDestroy(mEventSem); mEventSem = NIL_RTSEMEVENT; } if (pCtx->wndClass != 0) { UnregisterClass(VBOX_DND_WND_CLASS, pCtx->pEnv->hInstance); pCtx->wndClass = 0; } LogFlowFuncLeave(); } /** * Thread for handling the window's message pump. * * @return IPRT status code. * @param hThread Handle to this thread. * @param pvUser Pointer to VBoxDnDWnd instance which * is using the thread. */ /* static */ int VBoxDnDWnd::Thread(RTTHREAD hThread, void *pvUser) { AssertPtrReturn(pvUser, VERR_INVALID_POINTER); LogFlowFuncEnter(); VBoxDnDWnd *pThis = (VBoxDnDWnd*)pvUser; AssertPtr(pThis); PVBOXDNDCONTEXT pCtx = pThis->pCtx; AssertPtr(pCtx); AssertPtr(pCtx->pEnv); int rc = VINF_SUCCESS; AssertPtr(pCtx->pEnv); HINSTANCE hInstance = pCtx->pEnv->hInstance; Assert(hInstance != 0); /* Create our proxy window. */ WNDCLASSEX wc = { 0 }; wc.cbSize = sizeof(WNDCLASSEX); if (!GetClassInfoEx(hInstance, VBOX_DND_WND_CLASS, &wc)) { wc.lpfnWndProc = vboxDnDWndProc; wc.lpszClassName = VBOX_DND_WND_CLASS; wc.hInstance = hInstance; wc.style = CS_NOCLOSE; #ifdef VBOX_DND_DEBUG_WND wc.style |= CS_HREDRAW | CS_VREDRAW; wc.hbrBackground = (HBRUSH)(CreateSolidBrush(RGB(255, 0, 0))); #else wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1); #endif if (!RegisterClassEx(&wc)) { DWORD dwErr = GetLastError(); LogFlowFunc(("Unable to register proxy window class, error=%ld\n", dwErr)); rc = RTErrConvertFromWin32(dwErr); } } if (RT_SUCCESS(rc)) { DWORD dwExStyle = WS_EX_TOOLWINDOW | WS_EX_TRANSPARENT | WS_EX_NOACTIVATE; DWORD dwStyle = WS_POPUP; #ifdef VBOX_DND_DEBUG_WND dwExStyle &= ~WS_EX_TRANSPARENT; /* Remove transparency bit. */ dwStyle |= WS_VISIBLE; /* Make the window visible. */ #endif pThis->hWnd = CreateWindowEx(dwExStyle, VBOX_DND_WND_CLASS, VBOX_DND_WND_CLASS, dwStyle, #ifdef VBOX_DND_DEBUG_WND CW_USEDEFAULT, CW_USEDEFAULT, 200, 200, NULL, NULL, #else -200, -200, 100, 100, NULL, NULL, #endif hInstance, pThis /* lParm */); if (!pThis->hWnd) { DWORD dwErr = GetLastError(); LogFlowFunc(("Unable to create proxy window, error=%ld\n", dwErr)); rc = RTErrConvertFromWin32(dwErr); } else { #ifndef VBOX_DND_DEBUG_WND SetWindowPos(pThis->hWnd, HWND_TOPMOST, -200, -200, 0, 0, SWP_NOACTIVATE | SWP_HIDEWINDOW | SWP_NOCOPYBITS | SWP_NOREDRAW | SWP_NOSIZE); LogFlowFunc(("Proxy window created, hWnd=0x%x\n", pThis->hWnd)); #else LogFlowFunc(("Debug proxy window created, hWnd=0x%x\n", pThis->hWnd)); /* * Install some mouse tracking. */ TRACKMOUSEEVENT me; RT_ZERO(me); me.cbSize = sizeof(TRACKMOUSEEVENT); me.dwFlags = TME_HOVER | TME_LEAVE | TME_NONCLIENT; me.hwndTrack = pThis->hWnd; BOOL fRc = TrackMouseEvent(&me); Assert(fRc); #endif } } HRESULT hr = OleInitialize(NULL); if (SUCCEEDED(hr)) { #ifdef VBOX_WITH_DRAG_AND_DROP_GH rc = pThis->RegisterAsDropTarget(); #else rc = VINF_SUCCESS; #endif } else { LogRel(("DnD: Unable to initialize OLE, hr=%Rhrc\n", hr)); rc = VERR_COM_UNEXPECTED; } bool fSignalled = false; if (RT_SUCCESS(rc)) { rc = RTThreadUserSignal(hThread); fSignalled = RT_SUCCESS(rc); bool fShutdown = false; for (;;) { MSG uMsg; BOOL fRet; while ((fRet = GetMessage(&uMsg, 0, 0, 0)) > 0) { TranslateMessage(&uMsg); DispatchMessage(&uMsg); } Assert(fRet >= 0); if (ASMAtomicReadBool(&pCtx->fShutdown)) fShutdown = true; if (fShutdown) { LogFlowFunc(("Closing proxy window ...\n")); break; } /** @todo Immediately drop on failure? */ } #ifdef VBOX_WITH_DRAG_AND_DROP_GH int rc2 = pThis->UnregisterAsDropTarget(); if (RT_SUCCESS(rc)) rc = rc2; #endif OleUninitialize(); } if (!fSignalled) { int rc2 = RTThreadUserSignal(hThread); AssertRC(rc2); } LogFlowFuncLeaveRC(rc); return rc; } /** * Monitor enumeration callback for building up a simple bounding * box, capable of holding all enumerated monitors. * * @return BOOL TRUE if enumeration should continue, * FALSE if not. * @param hMonitor Handle to current monitor being enumerated. * @param hdcMonitor The current monitor's DC (device context). * @param lprcMonitor The current monitor's RECT. * @param lParam Pointer to a RECT structure holding the * bounding box to build. */ /* static */ BOOL CALLBACK VBoxDnDWnd::MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM lParam) { LPRECT pRect = (LPRECT)lParam; AssertPtrReturn(pRect, FALSE); AssertPtr(lprcMonitor); LogFlowFunc(("Monitor is %ld,%ld,%ld,%ld\n", lprcMonitor->left, lprcMonitor->top, lprcMonitor->right, lprcMonitor->bottom)); /* Build up a simple bounding box to hold the entire (virtual) screen. */ if (pRect->left > lprcMonitor->left) pRect->left = lprcMonitor->left; if (pRect->right < lprcMonitor->right) pRect->right = lprcMonitor->right; if (pRect->top > lprcMonitor->top) pRect->top = lprcMonitor->top; if (pRect->bottom < lprcMonitor->bottom) pRect->bottom = lprcMonitor->bottom; return TRUE; } /** * The proxy window's WndProc. */ LRESULT CALLBACK VBoxDnDWnd::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg) { case WM_CREATE: { int rc = OnCreate(); /** @todo r=bird: MSDN says this returns 0 on success and -1 on failure, not * TRUE/FALSE... */ if (RT_FAILURE(rc)) return FALSE; return TRUE; } case WM_QUIT: { LogFlowThisFunc(("WM_QUIT\n")); PostQuitMessage(0); return 0; } case WM_DESTROY: { LogFlowThisFunc(("WM_DESTROY\n")); OnDestroy(); return 0; } case WM_LBUTTONDOWN: { LogFlowThisFunc(("WM_LBUTTONDOWN\n")); mfMouseButtonDown = true; return 0; } case WM_LBUTTONUP: { LogFlowThisFunc(("WM_LBUTTONUP\n")); mfMouseButtonDown = false; /* As the mouse button was released, Hide the proxy window again. * This can happen if * - the user bumped a guest window to the screen's edges * - there was no drop data from the guest available and the user * enters the guest screen again after this unsuccessful operation */ reset(); return 0; } case WM_MOUSELEAVE: { LogFlowThisFunc(("WM_MOUSELEAVE\n")); return 0; } /* Will only be called once; after the first mouse move, this * window will be hidden! */ case WM_MOUSEMOVE: { LogFlowThisFunc(("WM_MOUSEMOVE: mfMouseButtonDown=%RTbool, mMode=%ld, mState=%ld\n", mfMouseButtonDown, mMode, mState)); #ifdef DEBUG_andy POINT p; GetCursorPos(&p); LogFlowThisFunc(("WM_MOUSEMOVE: curX=%ld, curY=%ld\n", p.x, p.y)); #endif int rc = VINF_SUCCESS; if (mMode == HG) /* Host to guest. */ { /* Dragging not started yet? Kick it off ... */ if ( mfMouseButtonDown && (mState != Dragging)) { mState = Dragging; #if 0 /* Delay hiding the proxy window a bit when debugging, to see * whether the desired range is covered correctly. */ RTThreadSleep(5000); #endif hide(); LogFlowThisFunc(("Starting drag and drop: uAllActions=0x%x, dwOKEffects=0x%x ...\n", uAllActions, startupInfo.dwOKEffects)); AssertPtr(startupInfo.pDataObject); AssertPtr(startupInfo.pDropSource); DWORD dwEffect; HRESULT hr = DoDragDrop(startupInfo.pDataObject, startupInfo.pDropSource, startupInfo.dwOKEffects, &dwEffect); LogFlowThisFunc(("hr=%Rhrc, dwEffect=%RI32\n", hr, dwEffect)); switch (hr) { case DRAGDROP_S_DROP: mState = Dropped; break; case DRAGDROP_S_CANCEL: mState = Canceled; break; default: LogFlowThisFunc(("Drag and drop failed with %Rhrc\n", hr)); mState = Canceled; rc = VERR_GENERAL_FAILURE; /** @todo Find a better status code. */ break; } int rc2 = RTCritSectEnter(&mCritSect); if (RT_SUCCESS(rc2)) { startupInfo.pDropSource->Release(); startupInfo.pDataObject->Release(); RT_ZERO(startupInfo); rc2 = RTCritSectLeave(&mCritSect); if (RT_SUCCESS(rc)) rc = rc2; } mMode = Unknown; } } else if (mMode == GH) /* Guest to host. */ { /* Starting here VBoxDnDDropTarget should * take over; was instantiated when registering * this proxy window as a (valid) drop target. */ } else rc = VERR_NOT_SUPPORTED; LogFlowThisFunc(("WM_MOUSEMOVE: mMode=%ld, mState=%ld, rc=%Rrc\n", mMode, mState, rc)); return 0; } case WM_NCMOUSEHOVER: LogFlowThisFunc(("WM_NCMOUSEHOVER\n")); return 0; case WM_NCMOUSELEAVE: LogFlowThisFunc(("WM_NCMOUSELEAVE\n")); return 0; case WM_VBOXTRAY_DND_MESSAGE: { VBOXDNDEVENT *pEvent = (PVBOXDNDEVENT)lParam; if (!pEvent) break; /* No event received, bail out. */ LogFlowThisFunc(("Received uType=%RU32, uScreenID=%RU32\n", pEvent->Event.uType, pEvent->Event.uScreenId)); int rc; switch (pEvent->Event.uType) { case HOST_DND_HG_EVT_ENTER: { LogFlowThisFunc(("HOST_DND_HG_EVT_ENTER\n")); if (pEvent->Event.cbFormats) { RTCList lstFormats = RTCString(pEvent->Event.pszFormats, pEvent->Event.cbFormats - 1).split("\r\n"); rc = OnHgEnter(lstFormats, pEvent->Event.u.a.uAllActions); } else { AssertMsgFailed(("cbFormats is 0\n")); rc = VERR_INVALID_PARAMETER; } /* Note: After HOST_DND_HG_EVT_ENTER there immediately is a move * event, so fall through is intentional here. */ } case HOST_DND_HG_EVT_MOVE: { LogFlowThisFunc(("HOST_DND_HG_EVT_MOVE: %d,%d\n", pEvent->Event.u.a.uXpos, pEvent->Event.u.a.uYpos)); rc = OnHgMove(pEvent->Event.u.a.uXpos, pEvent->Event.u.a.uYpos, pEvent->Event.u.a.uDefAction); break; } case HOST_DND_HG_EVT_LEAVE: { LogFlowThisFunc(("HOST_DND_HG_EVT_LEAVE\n")); rc = OnHgLeave(); break; } case HOST_DND_HG_EVT_DROPPED: { LogFlowThisFunc(("HOST_DND_HG_EVT_DROPPED\n")); rc = OnHgDrop(); break; } case HOST_DND_HG_SND_DATA: /* Protocol v1 + v2: Also contains the header data. /* Note: Fall through is intentional. */ case HOST_DND_HG_SND_DATA_HDR: { LogFlowThisFunc(("HOST_DND_HG_SND_DATA\n")); rc = OnHgDataReceived(pEvent->Event.u.b.pvData, pEvent->Event.u.b.cbData); break; } case HOST_DND_HG_EVT_CANCEL: { LogFlowThisFunc(("HOST_DND_HG_EVT_CANCEL\n")); rc = OnHgCancel(); break; } case HOST_DND_GH_REQ_PENDING: { LogFlowThisFunc(("HOST_DND_GH_REQ_PENDING\n")); #ifdef VBOX_WITH_DRAG_AND_DROP_GH rc = OnGhIsDnDPending(pEvent->Event.uScreenId); #else rc = VERR_NOT_SUPPORTED; #endif break; } case HOST_DND_GH_EVT_DROPPED: { LogFlowThisFunc(("HOST_DND_GH_EVT_DROPPED\n")); #ifdef VBOX_WITH_DRAG_AND_DROP_GH rc = OnGhDropped(pEvent->Event.pszFormats, pEvent->Event.cbFormats, pEvent->Event.u.a.uDefAction); #else rc = VERR_NOT_SUPPORTED; #endif break; } default: rc = VERR_NOT_SUPPORTED; break; } /* Some messages require cleanup. */ switch (pEvent->Event.uType) { case HOST_DND_HG_EVT_ENTER: case HOST_DND_HG_EVT_MOVE: case HOST_DND_HG_EVT_DROPPED: #ifdef VBOX_WITH_DRAG_AND_DROP_GH case HOST_DND_GH_EVT_DROPPED: #endif { if (pEvent->Event.pszFormats) RTMemFree(pEvent->Event.pszFormats); break; } case HOST_DND_HG_SND_DATA: case HOST_DND_HG_SND_DATA_HDR: { if (pEvent->Event.pszFormats) RTMemFree(pEvent->Event.pszFormats); if (pEvent->Event.u.b.pvData) RTMemFree(pEvent->Event.u.b.pvData); break; } default: /* Ignore. */ break; } if (pEvent) { LogFlowThisFunc(("Processing event %RU32 resulted in rc=%Rrc\n", pEvent->Event.uType, rc)); RTMemFree(pEvent); } return 0; } default: break; } return DefWindowProc(hWnd, uMsg, wParam, lParam); } #ifdef VBOX_WITH_DRAG_AND_DROP_GH /** * Registers this proxy window as a local drop target. * * @return IPRT status code. */ int VBoxDnDWnd::RegisterAsDropTarget(void) { if (pDropTarget) /* Already registered as drop target? */ return VINF_SUCCESS; int rc; try { pDropTarget = new VBoxDnDDropTarget(this /* pParent */); HRESULT hr = CoLockObjectExternal(pDropTarget, TRUE /* fLock */, FALSE /* fLastUnlockReleases */); if (SUCCEEDED(hr)) hr = RegisterDragDrop(hWnd, pDropTarget); if (FAILED(hr)) { LogRel(("DnD: Creating drop target failed with hr=%Rhrc\n", hr)); rc = VERR_GENERAL_FAILURE; /** @todo Find a better rc. */ } else { rc = VINF_SUCCESS; } } catch (std::bad_alloc) { rc = VERR_NO_MEMORY; } LogFlowFuncLeaveRC(rc); return rc; } /** * Unregisters this proxy as a drop target. * * @return IPRT status code. */ int VBoxDnDWnd::UnregisterAsDropTarget(void) { LogFlowFuncEnter(); if (!pDropTarget) /* No drop target? Bail out. */ return VINF_SUCCESS; HRESULT hr = RevokeDragDrop(hWnd); if (SUCCEEDED(hr)) hr = CoLockObjectExternal(pDropTarget, FALSE /* fLock */, TRUE /* fLastUnlockReleases */); if (SUCCEEDED(hr)) { ULONG cRefs = pDropTarget->Release(); Assert(cRefs == 0); pDropTarget = NULL; } int rc = SUCCEEDED(hr) ? VINF_SUCCESS : VERR_GENERAL_FAILURE; /** @todo Fix this. */ LogFlowFuncLeaveRC(rc); return rc; } #endif /* VBOX_WITH_DRAG_AND_DROP_GH */ /** * Handles the creation of a proxy window. * * @return IPRT status code. */ int VBoxDnDWnd::OnCreate(void) { LogFlowFuncEnter(); int rc = VbglR3DnDConnect(&mDnDCtx); if (RT_FAILURE(rc)) { LogFlowThisFunc(("Connection to host service failed, rc=%Rrc\n", rc)); return rc; } LogFlowThisFunc(("Client ID=%RU32, rc=%Rrc\n", mDnDCtx.uClientID, rc)); return rc; } /** * Handles the destruction of a proxy window. */ void VBoxDnDWnd::OnDestroy(void) { DestroyWindow(hWnd); VbglR3DnDDisconnect(&mDnDCtx); LogFlowThisFuncLeave(); } /** * Handles actions required when the host cursor enters * the guest's screen to initiate a host -> guest DnD operation. * * @return IPRT status code. * @param lstFormats Supported formats offered by the host. * @param uAllActions Supported actions offered by the host. */ int VBoxDnDWnd::OnHgEnter(const RTCList &lstFormats, uint32_t uAllActions) { if (mMode == GH) /* Wrong mode? Bail out. */ return VERR_WRONG_ORDER; #ifdef DEBUG LogFlowThisFunc(("uActions=0x%x, lstFormats=%zu: ", uAllActions, lstFormats.size())); for (size_t i = 0; i < lstFormats.size(); i++) LogFlow(("'%s' ", lstFormats.at(i).c_str())); LogFlow(("\n")); #endif reset(); setMode(HG); int rc = VINF_SUCCESS; try { /* Save all allowed actions. */ this->uAllActions = uAllActions; /* * Check if reported formats from host are compatible with this client. */ size_t cFormatsSup = this->lstFmtSup.size(); ULONG cFormatsActive = 0; LPFORMATETC pFormatEtc = new FORMATETC[cFormatsSup]; RT_BZERO(pFormatEtc, sizeof(FORMATETC) * cFormatsSup); LPSTGMEDIUM pStgMeds = new STGMEDIUM[cFormatsSup]; RT_BZERO(pStgMeds, sizeof(STGMEDIUM) * cFormatsSup); LogRel2(("DnD: Reported formats:\n")); for (size_t i = 0; i < lstFormats.size(); i++) { bool fSupported = false; for (size_t a = 0; a < this->lstFmtSup.size(); a++) { const char *pszFormat = lstFormats.at(i).c_str(); LogFlowThisFunc(("\t\"%s\" <=> \"%s\"\n", this->lstFmtSup.at(a).c_str(), pszFormat)); fSupported = RTStrICmp(this->lstFmtSup.at(a).c_str(), pszFormat) == 0; if (fSupported) { this->lstFmtActive.append(lstFormats.at(i)); /** @todo Put this into a \#define / struct. */ if (!RTStrICmp(pszFormat, "text/uri-list")) { pFormatEtc[cFormatsActive].cfFormat = CF_HDROP; pFormatEtc[cFormatsActive].dwAspect = DVASPECT_CONTENT; pFormatEtc[cFormatsActive].lindex = -1; pFormatEtc[cFormatsActive].tymed = TYMED_HGLOBAL; pStgMeds [cFormatsActive].tymed = TYMED_HGLOBAL; cFormatsActive++; } else if ( !RTStrICmp(pszFormat, "text/plain") || !RTStrICmp(pszFormat, "text/html") || !RTStrICmp(pszFormat, "text/plain;charset=utf-8") || !RTStrICmp(pszFormat, "text/plain;charset=utf-16") || !RTStrICmp(pszFormat, "text/plain") || !RTStrICmp(pszFormat, "text/richtext") || !RTStrICmp(pszFormat, "UTF8_STRING") || !RTStrICmp(pszFormat, "TEXT") || !RTStrICmp(pszFormat, "STRING")) { pFormatEtc[cFormatsActive].cfFormat = CF_TEXT; pFormatEtc[cFormatsActive].dwAspect = DVASPECT_CONTENT; pFormatEtc[cFormatsActive].lindex = -1; pFormatEtc[cFormatsActive].tymed = TYMED_HGLOBAL; pStgMeds [cFormatsActive].tymed = TYMED_HGLOBAL; cFormatsActive++; } else /* Should never happen. */ AssertReleaseMsgFailedBreak(("Format specification for '%s' not implemented\n", pszFormat)); break; } } LogRel2(("DnD: \t%s: %RTbool\n", lstFormats.at(i).c_str(), fSupported)); } /* * Warn in the log if this guest does not accept anything. */ Assert(cFormatsActive <= cFormatsSup); if (cFormatsActive) { LogRel2(("DnD: %RU32 supported formats found:\n", cFormatsActive)); for (size_t i = 0; i < cFormatsActive; i++) LogRel2(("DnD: \t%s\n", this->lstFmtActive.at(i).c_str())); } else LogRel(("DnD: Warning: No supported drag and drop formats on the guest found!\n")); /* * Prepare the startup info for DoDragDrop(). */ /* Translate our drop actions into allowed Windows drop effects. */ startupInfo.dwOKEffects = DROPEFFECT_NONE; if (uAllActions) { if (uAllActions & DND_COPY_ACTION) startupInfo.dwOKEffects |= DROPEFFECT_COPY; if (uAllActions & DND_MOVE_ACTION) startupInfo.dwOKEffects |= DROPEFFECT_MOVE; if (uAllActions & DND_LINK_ACTION) startupInfo.dwOKEffects |= DROPEFFECT_LINK; } LogRel2(("DnD: Supported drop actions: 0x%x\n", startupInfo.dwOKEffects)); startupInfo.pDropSource = new VBoxDnDDropSource(this); startupInfo.pDataObject = new VBoxDnDDataObject(pFormatEtc, pStgMeds, cFormatsActive); if (pFormatEtc) delete pFormatEtc; if (pStgMeds) delete pStgMeds; } catch (std::bad_alloc) { rc = VERR_NO_MEMORY; } if (RT_SUCCESS(rc)) rc = makeFullscreen(); LogFlowFuncLeaveRC(rc); return rc; } /** * Handles actions required when the host cursor moves inside * the guest's screen. * * @return IPRT status code. * @param u32xPos Absolute X position (in pixels) of the host cursor * inside the guest. * @param u32yPos Absolute Y position (in pixels) of the host cursor * inside the guest. * @param uAction Action the host wants to perform while moving. * Currently ignored. */ int VBoxDnDWnd::OnHgMove(uint32_t u32xPos, uint32_t u32yPos, uint32_t uAction) { int rc; uint32_t uActionNotify = DND_IGNORE_ACTION; if (mMode == HG) { LogFlowThisFunc(("u32xPos=%RU32, u32yPos=%RU32, uAction=0x%x\n", u32xPos, u32yPos, uAction)); rc = mouseMove(u32xPos, u32yPos, MOUSEEVENTF_LEFTDOWN); if (RT_SUCCESS(rc)) rc = RTCritSectEnter(&mCritSect); if (RT_SUCCESS(rc)) { if ( (Dragging == mState) && startupInfo.pDropSource) uActionNotify = startupInfo.pDropSource->GetCurrentAction(); RTCritSectLeave(&mCritSect); } } else /* Just acknowledge the operation with an ignore action. */ rc = VINF_SUCCESS; if (RT_SUCCESS(rc)) { rc = VbglR3DnDHGSendAckOp(&mDnDCtx, uActionNotify); if (RT_FAILURE(rc)) LogFlowThisFunc(("Acknowledging operation failed with rc=%Rrc\n", rc)); } LogFlowThisFunc(("Returning uActionNotify=0x%x, rc=%Rrc\n", uActionNotify, rc)); return rc; } /** * Handles actions required when the host cursor leaves * the guest's screen again. * * @return IPRT status code. */ int VBoxDnDWnd::OnHgLeave(void) { if (mMode == GH) /* Wrong mode? Bail out. */ return VERR_WRONG_ORDER; LogFlowThisFunc(("mMode=%ld, mState=%RU32\n", mMode, mState)); LogRel(("DnD: Drag and drop operation aborted\n")); reset(); int rc = VINF_SUCCESS; /* Post ESC to our window to officially abort the * drag and drop operation. */ this->PostMessage(WM_KEYDOWN, VK_ESCAPE /* wParam */, 0 /* lParam */); LogFlowFuncLeaveRC(rc); return rc; } /** * Handles actions required when the host cursor wants to drop * and therefore start a "drop" action in the guest. * * @return IPRT status code. */ int VBoxDnDWnd::OnHgDrop(void) { if (mMode == GH) return VERR_WRONG_ORDER; LogFlowThisFunc(("mMode=%ld, mState=%RU32\n", mMode, mState)); int rc = VINF_SUCCESS; if (mState == Dragging) { if (lstFmtActive.size() >= 1) { /** @todo What to do when multiple formats are available? */ mFormatRequested = lstFmtActive.at(0); rc = RTCritSectEnter(&mCritSect); if (RT_SUCCESS(rc)) { if (startupInfo.pDataObject) startupInfo.pDataObject->SetStatus(VBoxDnDDataObject::Dropping); else rc = VERR_NOT_FOUND; RTCritSectLeave(&mCritSect); } if (RT_SUCCESS(rc)) { LogRel(("DnD: Requesting data as '%s' ...\n", mFormatRequested.c_str())); rc = VbglR3DnDHGSendReqData(&mDnDCtx, mFormatRequested.c_str()); if (RT_FAILURE(rc)) LogFlowThisFunc(("Requesting data failed with rc=%Rrc\n", rc)); } } else /* Should never happen. */ LogRel(("DnD: Error: Host did not specify a data format for drop data\n")); } LogFlowFuncLeaveRC(rc); return rc; } /** * Handles actions required when the host has sent over DnD data * to the guest after a "drop" event. * * @return IPRT status code. * @param pvData Pointer to raw data received. * @param cbData Size of data (in bytes) received. */ int VBoxDnDWnd::OnHgDataReceived(const void *pvData, uint32_t cbData) { LogFlowThisFunc(("mState=%ld, pvData=%p, cbData=%RU32\n", mState, pvData, cbData)); mState = Dropped; int rc = VINF_SUCCESS; if (pvData) { Assert(cbData); rc = RTCritSectEnter(&mCritSect); if (RT_SUCCESS(rc)) { if (startupInfo.pDataObject) rc = startupInfo.pDataObject->Signal(mFormatRequested, pvData, cbData); else rc = VERR_NOT_FOUND; RTCritSectLeave(&mCritSect); } } int rc2 = mouseRelease(); if (RT_SUCCESS(rc)) rc = rc2; LogFlowFuncLeaveRC(rc); return rc; } /** * Handles actions required when the host wants to cancel the current * host -> guest operation. * * @return IPRT status code. */ int VBoxDnDWnd::OnHgCancel(void) { int rc = RTCritSectEnter(&mCritSect); if (RT_SUCCESS(rc)) { if (startupInfo.pDataObject) startupInfo.pDataObject->Abort(); RTCritSectLeave(&mCritSect); } int rc2 = mouseRelease(); if (RT_SUCCESS(rc)) rc = rc2; reset(); return rc; } #ifdef VBOX_WITH_DRAG_AND_DROP_GH /** * Handles actions required to start a guest -> host DnD operation. * This works by letting the host ask whether a DnD operation is pending * on the guest. The guest must not know anything about the host's DnD state * and/or operations due to security reasons. * * To capture a pending DnD operation on the guest which then can be communicated * to the host the proxy window needs to be registered as a drop target. This drop * target then will act as a proxy target between the guest OS and the host. In other * words, the guest OS will use this proxy target as a regular (invisible) window * which can be used by the regular guest OS' DnD mechanisms, independently of the * host OS. To make sure this proxy target is able receive an in-progress DnD operation * on the guest, it will be shown invisibly across all active guest OS screens. Just * think of an opened umbrella across all screens here. * * As soon as the proxy target and its underlying data object receive appropriate * DnD messages they'll be hidden again, and the control will be transferred back * this class again. * * @return IPRT status code. * @param uScreenID Screen ID the host wants to query a pending operation * for. Currently not used/needed here. */ int VBoxDnDWnd::OnGhIsDnDPending(uint32_t uScreenID) { LogFlowThisFunc(("mMode=%ld, mState=%ld, uScreenID=%RU32\n", mMode, mState, uScreenID)); if (mMode == Unknown) setMode(GH); if (mMode != GH) return VERR_WRONG_ORDER; if (mState == Uninitialized) { /* Nothing to do here yet. */ mState = Initialized; } int rc; if (mState == Initialized) { rc = makeFullscreen(); if (RT_SUCCESS(rc)) { /* * We have to release the left mouse button to * get into our (invisible) proxy window. */ mouseRelease(); /* * Even if we just released the left mouse button * we're still in the dragging state to handle our * own drop target (for the host). */ mState = Dragging; } } else rc = VINF_SUCCESS; /** * Some notes regarding guest cursor movement: * - The host only sends an HOST_DND_GH_REQ_PENDING message to the guest * if the mouse cursor is outside the VM's window. * - The guest does not know anything about the host's cursor * position / state due to security reasons. * - The guest *only* knows that the host currently is asking whether a * guest DnD operation is in progress. */ if ( RT_SUCCESS(rc) && mState == Dragging) { /** @todo Put this block into a function! */ POINT p; GetCursorPos(&p); ClientToScreen(hWnd, &p); #ifdef DEBUG_andy LogFlowThisFunc(("Client to screen curX=%ld, curY=%ld\n", p.x, p.y)); #endif /** @todo Multi-monitor setups? */ int iScreenX = GetSystemMetrics(SM_CXSCREEN) - 1; int iScreenY = GetSystemMetrics(SM_CYSCREEN) - 1; static LONG px = p.x; if (px <= 0) px = 1; static LONG py = p.y; if (py <= 0) py = 1; rc = mouseMove(px, py, 0 /* dwMouseInputFlags */); } if (RT_SUCCESS(rc)) { uint32_t uDefAction = DND_IGNORE_ACTION; AssertPtr(pDropTarget); RTCString strFormats = pDropTarget->Formats(); if (!strFormats.isEmpty()) { uDefAction = DND_COPY_ACTION; LogFlowFunc(("Acknowledging pDropTarget=0x%p, uDefAction=0x%x, uAllActions=0x%x, strFormats=%s\n", pDropTarget, uDefAction, uAllActions, strFormats.c_str())); } else { strFormats = "unknown"; /* Prevent VERR_IO_GEN_FAILURE for IOCTL. */ LogFlowFunc(("No format data available yet\n")); } /** @todo Support more than one action at a time. */ uAllActions = uDefAction; int rc2 = VbglR3DnDGHSendAckPending(&mDnDCtx, uDefAction, uAllActions, strFormats.c_str(), strFormats.length() + 1 /* Include termination */); if (RT_FAILURE(rc2)) { char szMsg[256]; /* Sizes according to MSDN. */ char szTitle[64]; /** @todo Add some i18l tr() macros here. */ RTStrPrintf(szTitle, sizeof(szTitle), "VirtualBox Guest Additions Drag and Drop"); RTStrPrintf(szMsg, sizeof(szMsg), "Drag and drop to the host either is not supported or disabled. " "Please enable Guest to Host or Bidirectional drag and drop mode " "or re-install the VirtualBox Guest Additions."); switch (rc2) { case VERR_ACCESS_DENIED: { rc = hlpShowBalloonTip(g_hInstance, g_hwndToolWindow, ID_TRAYICON, szMsg, szTitle, 15 * 1000 /* Time to display in msec */, NIIF_INFO); AssertRC(rc); break; } default: break; } LogRel2(("DnD: Host refuses drag and drop operation from guest: %Rrc\n", rc2)); reset(); } } if (RT_FAILURE(rc)) reset(); /* Reset state on failure. */ LogFlowFuncLeaveRC(rc); return rc; } /** * Handles actions required to let the guest know that the host * started a "drop" action on the host. This will tell the guest * to send data in a specific format the host requested. * * @return IPRT status code. * @param pszFormat Format the host requests the data in. * @param cbFormat Size (in bytes) of format string. * @param uDefAction Default action on the host. */ int VBoxDnDWnd::OnGhDropped(const char *pszFormat, uint32_t cbFormat, uint32_t uDefAction) { AssertPtrReturn(pszFormat, VERR_INVALID_POINTER); AssertReturn(cbFormat, VERR_INVALID_PARAMETER); LogFlowThisFunc(("mMode=%ld, mState=%ld, pDropTarget=0x%p, pszFormat=%s, uDefAction=0x%x\n", mMode, mState, pDropTarget, pszFormat, uDefAction)); int rc; if (mMode == GH) { if (mState == Dragging) { AssertPtr(pDropTarget); rc = pDropTarget->WaitForDrop(5 * 1000 /* 5s timeout */); reset(); } else if (mState == Dropped) { rc = VINF_SUCCESS; } else rc = VERR_WRONG_ORDER; if (RT_SUCCESS(rc)) { /** @todo Respect uDefAction. */ void *pvData = pDropTarget->DataMutableRaw(); uint32_t cbData = pDropTarget->DataSize(); if ( pvData && cbData) { rc = VbglR3DnDGHSendData(&mDnDCtx, pszFormat, pvData, cbData); LogFlowFunc(("Sent pvData=0x%p, cbData=%RU32, rc=%Rrc\n", pvData, cbData, rc)); } else rc = VERR_NO_DATA; } } else rc = VERR_WRONG_ORDER; if (RT_FAILURE(rc)) { /* * If an error occurred or the guest is in a wrong DnD mode, * send an error to the host in any case so that the host does * not wait for the data it expects from the guest. */ int rc2 = VbglR3DnDGHSendError(&mDnDCtx, rc); AssertRC(rc2); } LogFlowFuncLeaveRC(rc); return rc; } #endif /* VBOX_WITH_DRAG_AND_DROP_GH */ void VBoxDnDWnd::PostMessage(UINT uMsg, WPARAM wParam, LPARAM lParam) { LogFlowFunc(("Posting message %u\n")); BOOL fRc = ::PostMessage(hWnd, uMsg, wParam, lParam); Assert(fRc); } /** * Injects a DnD event in this proxy window's Windows * event queue. The (allocated) event will be deleted by * this class after processing. * * @return IPRT status code. * @param pEvent Event to inject. */ int VBoxDnDWnd::ProcessEvent(PVBOXDNDEVENT pEvent) { AssertPtrReturn(pEvent, VERR_INVALID_POINTER); BOOL fRc = ::PostMessage(hWnd, WM_VBOXTRAY_DND_MESSAGE, 0 /* wParm */, (LPARAM)pEvent /* lParm */); if (!fRc) { DWORD dwErr = GetLastError(); static int s_iBitchedAboutFailedDnDMessages = 0; if (s_iBitchedAboutFailedDnDMessages++ < 32) { LogRel(("DnD: Processing event %p failed with %ld (%Rrc), skipping\n", pEvent, dwErr, RTErrConvertFromWin32(dwErr))); } RTMemFree(pEvent); pEvent = NULL; return RTErrConvertFromWin32(dwErr); } return VINF_SUCCESS; } /** * Hides the proxy window again. * * @return IPRT status code. */ int VBoxDnDWnd::hide(void) { #ifdef DEBUG_andy LogFlowFunc(("\n")); #endif ShowWindow(hWnd, SW_HIDE); return VINF_SUCCESS; } /** * Shows the (invisible) proxy window in fullscreen, * spawned across all active guest monitors. * * @return IPRT status code. */ int VBoxDnDWnd::makeFullscreen(void) { int rc = VINF_SUCCESS; RECT r; RT_ZERO(r); BOOL fRc; HDC hDC = GetDC(NULL /* Entire screen */); if (hDC) { fRc = s_pfnEnumDisplayMonitors /* EnumDisplayMonitors is not available on NT4. */ ? s_pfnEnumDisplayMonitors(hDC, NULL, VBoxDnDWnd::MonitorEnumProc, (LPARAM)&r): FALSE; if (!fRc) rc = VERR_NOT_FOUND; ReleaseDC(NULL, hDC); } else rc = VERR_ACCESS_DENIED; if (RT_FAILURE(rc)) { /* If multi-monitor enumeration failed above, try getting at least the * primary monitor as a fallback. */ r.left = 0; r.top = 0; r.right = GetSystemMetrics(SM_CXSCREEN); r.bottom = GetSystemMetrics(SM_CYSCREEN); rc = VINF_SUCCESS; } if (RT_SUCCESS(rc)) { LONG lStyle = GetWindowLong(hWnd, GWL_STYLE); SetWindowLong(hWnd, GWL_STYLE, lStyle & ~(WS_CAPTION | WS_THICKFRAME)); LONG lExStyle = GetWindowLong(hWnd, GWL_EXSTYLE); SetWindowLong(hWnd, GWL_EXSTYLE, lExStyle & ~( WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE)); fRc = SetWindowPos(hWnd, HWND_TOPMOST, r.left, r.top, r.right - r.left, r.bottom - r.top, #ifdef VBOX_DND_DEBUG_WND SWP_SHOWWINDOW | SWP_FRAMECHANGED); #else SWP_SHOWWINDOW | SWP_NOOWNERZORDER | SWP_NOREDRAW | SWP_NOACTIVATE); #endif if (fRc) { LogFlowFunc(("Virtual screen is %ld,%ld,%ld,%ld (%ld x %ld)\n", r.left, r.top, r.right, r.bottom, r.right - r.left, r.bottom - r.top)); } else { DWORD dwErr = GetLastError(); LogRel(("DnD: Failed to set proxy window position, rc=%Rrc\n", RTErrConvertFromWin32(dwErr))); } } else LogRel(("DnD: Failed to determine virtual screen size, rc=%Rrc\n", rc)); LogFlowFuncLeaveRC(rc); return rc; } /** * Moves the guest mouse cursor to a specific position. * * @return IPRT status code. * @param x X position (in pixels) to move cursor to. * @param y Y position (in pixels) to move cursor to. * @param dwMouseInputFlags Additional movement flags. @sa MOUSEEVENTF_ flags. */ int VBoxDnDWnd::mouseMove(int x, int y, DWORD dwMouseInputFlags) { int iScreenX = GetSystemMetrics(SM_CXSCREEN) - 1; int iScreenY = GetSystemMetrics(SM_CYSCREEN) - 1; INPUT Input[1] = { 0 }; Input[0].type = INPUT_MOUSE; Input[0].mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE | dwMouseInputFlags; Input[0].mi.dx = x * (65535 / iScreenX); Input[0].mi.dy = y * (65535 / iScreenY); int rc; if (s_pfnSendInput(1 /* Number of inputs */, Input, sizeof(INPUT))) { #ifdef DEBUG_andy CURSORINFO ci; RT_ZERO(ci); ci.cbSize = sizeof(ci); BOOL fRc = GetCursorInfo(&ci); if (fRc) LogFlowThisFunc(("Cursor shown=%RTbool, cursor=0x%p, x=%d, y=%d\n", (ci.flags & CURSOR_SHOWING) ? true : false, ci.hCursor, ci.ptScreenPos.x, ci.ptScreenPos.y)); #endif rc = VINF_SUCCESS; } else { DWORD dwErr = GetLastError(); rc = RTErrConvertFromWin32(dwErr); LogFlowFunc(("SendInput failed with rc=%Rrc\n", rc)); } return rc; } /** * Releases a previously pressed left guest mouse button. * * @return IPRT status code. */ int VBoxDnDWnd::mouseRelease(void) { LogFlowFuncEnter(); int rc; /* Release mouse button in the guest to start the "drop" * action at the current mouse cursor position. */ INPUT Input[1] = { 0 }; Input[0].type = INPUT_MOUSE; Input[0].mi.dwFlags = MOUSEEVENTF_LEFTUP; if (!s_pfnSendInput(1, Input, sizeof(INPUT))) { DWORD dwErr = GetLastError(); rc = RTErrConvertFromWin32(dwErr); LogFlowFunc(("SendInput failed with rc=%Rrc\n", rc)); } else rc = VINF_SUCCESS; return rc; } /** * Resets the proxy window. */ void VBoxDnDWnd::reset(void) { LogFlowThisFunc(("Resetting, old mMode=%ld, mState=%ld\n", mMode, mState)); /* * Note: Don't clear this->lstAllowedFormats at the moment, as this value is initialized * on class creation. We might later want to modify the allowed formats at runtime, * so keep this in mind when implementing this. */ this->lstFmtActive.clear(); this->uAllActions = DND_IGNORE_ACTION; int rc2 = setMode(Unknown); AssertRC(rc2); hide(); } /** * Sets the current operation mode of this proxy window. * * @return IPRT status code. * @param enmMode New mode to set. */ int VBoxDnDWnd::setMode(Mode enmMode) { LogFlowThisFunc(("Old mode=%ld, new mode=%ld\n", mMode, enmMode)); mMode = enmMode; mState = Initialized; return VINF_SUCCESS; } /** * Static helper function for having an own WndProc for proxy * window instances. */ static LRESULT CALLBACK vboxDnDWndProcInstance(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { LONG_PTR pUserData = GetWindowLongPtr(hWnd, GWLP_USERDATA); AssertPtrReturn(pUserData, 0); VBoxDnDWnd *pWnd = reinterpret_cast(pUserData); if (pWnd) return pWnd->WndProc(hWnd, uMsg, wParam, lParam); return 0; } /** * Static helper function for routing Windows messages to a specific * proxy window instance. */ static LRESULT CALLBACK vboxDnDWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { /* Note: WM_NCCREATE is not the first ever message which arrives, but * early enough for us. */ if (uMsg == WM_NCCREATE) { LPCREATESTRUCT pCS = (LPCREATESTRUCT)lParam; AssertPtr(pCS); SetWindowLongPtr(hWnd, GWLP_USERDATA, (LONG_PTR)pCS->lpCreateParams); SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)vboxDnDWndProcInstance); return vboxDnDWndProcInstance(hWnd, uMsg, wParam, lParam); } /* No window associated yet. */ return DefWindowProc(hWnd, uMsg, wParam, lParam); } /** * Initializes drag and drop. * * @return IPRT status code. * @param pEnv The DnD service's environment. * @param ppInstance The instance pointer which refer to this object. * @param pfStartThread Pointer to flag whether the DnD service can be started or not. */ DECLCALLBACK(int) VBoxDnDInit(const PVBOXSERVICEENV pEnv, void **ppInstance) { AssertPtrReturn(pEnv, VERR_INVALID_POINTER); AssertPtrReturn(ppInstance, VERR_INVALID_POINTER); LogFlowFuncEnter(); PVBOXDNDCONTEXT pCtx = &g_Ctx; /* Only one instance at the moment. */ AssertPtr(pCtx); int rc; bool fSupportedOS = true; if (VbglR3AutoLogonIsRemoteSession()) { /* Do not do drag and drop for remote sessions. */ LogRel(("DnD: Drag and drop has been disabled for a remote session\n")); rc = VERR_NOT_SUPPORTED; } else rc = VINF_SUCCESS; if (RT_SUCCESS(rc)) { s_pfnSendInput = (PFNSENDINPUT) RTLdrGetSystemSymbol("User32.dll", "SendInput"); fSupportedOS = !RT_BOOL(s_pfnSendInput == NULL); s_pfnEnumDisplayMonitors = (PFNENUMDISPLAYMONITORS) RTLdrGetSystemSymbol("User32.dll", "EnumDisplayMonitors"); /* g_pfnEnumDisplayMonitors is optional. */ if (!fSupportedOS) { LogRel(("DnD: Not supported Windows version, disabling drag and drop support\n")); rc = VERR_NOT_SUPPORTED; } } if (RT_SUCCESS(rc)) { /* Assign service environment to our context. */ pCtx->pEnv = pEnv; /* Create the proxy window. At the moment we * only support one window at a time. */ VBoxDnDWnd *pWnd = NULL; try { pWnd = new VBoxDnDWnd(); rc = pWnd->Initialize(pCtx); /* Add proxy window to our proxy windows list. */ if (RT_SUCCESS(rc)) pCtx->lstWnd.append(pWnd); } catch (std::bad_alloc) { rc = VERR_NO_MEMORY; } } if (RT_SUCCESS(rc)) rc = RTSemEventCreate(&pCtx->hEvtQueueSem); if (RT_SUCCESS(rc)) { *ppInstance = pCtx; LogRel(("DnD: Drag and drop service successfully started\n")); } else LogRel(("DnD: Initializing drag and drop service failed with rc=%Rrc\n", rc)); LogFlowFuncLeaveRC(rc); return rc; } DECLCALLBACK(int) VBoxDnDStop(void *pInstance) { AssertPtrReturn(pInstance, VERR_INVALID_POINTER); LogFunc(("Stopping pInstance=%p\n", pInstance)); PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance; AssertPtr(pCtx); /* Set shutdown indicator. */ ASMAtomicWriteBool(&pCtx->fShutdown, true); /* Disconnect. */ VbglR3DnDDisconnect(&pCtx->cmdCtx); LogFlowFuncLeaveRC(VINF_SUCCESS); return VINF_SUCCESS; } DECLCALLBACK(void) VBoxDnDDestroy(void *pInstance) { AssertPtrReturnVoid(pInstance); LogFunc(("Destroying pInstance=%p\n", pInstance)); PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance; AssertPtr(pCtx); int rc = VINF_SUCCESS; /** @todo At the moment we only have one DnD proxy window. */ Assert(pCtx->lstWnd.size() == 1); VBoxDnDWnd *pWnd = pCtx->lstWnd.first(); if (pWnd) { delete pWnd; pWnd = NULL; } if (pCtx->hEvtQueueSem != NIL_RTSEMEVENT) RTSemEventDestroy(pCtx->hEvtQueueSem); LogFunc(("Destroyed pInstance=%p, rc=%Rrc\n", pInstance, rc)); } DECLCALLBACK(int) VBoxDnDWorker(void *pInstance, bool volatile *pfShutdown) { AssertPtr(pInstance); LogFlowFunc(("pInstance=%p\n", pInstance)); /* * Tell the control thread that it can continue * spawning services. */ RTThreadUserSignal(RTThreadSelf()); PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance; AssertPtr(pCtx); int rc = VbglR3DnDConnect(&pCtx->cmdCtx); if (RT_FAILURE(rc)) return rc; /** @todo At the moment we only have one DnD proxy window. */ Assert(pCtx->lstWnd.size() == 1); VBoxDnDWnd *pWnd = pCtx->lstWnd.first(); AssertPtr(pWnd); /* Number of invalid messages skipped in a row. */ int cMsgSkippedInvalid = 0; PVBOXDNDEVENT pEvent = NULL; for (;;) { pEvent = (PVBOXDNDEVENT)RTMemAllocZ(sizeof(VBOXDNDEVENT)); if (!pEvent) { rc = VERR_NO_MEMORY; break; } /* Note: pEvent will be free'd by the consumer later. */ rc = VbglR3DnDRecvNextMsg(&pCtx->cmdCtx, &pEvent->Event); LogFlowFunc(("VbglR3DnDRecvNextMsg: uType=%RU32, rc=%Rrc\n", pEvent->Event.uType, rc)); if ( RT_SUCCESS(rc) /* Cancelled from host. */ || rc == VERR_CANCELLED ) { cMsgSkippedInvalid = 0; /* Reset skipped messages count. */ LogFlowFunc(("Received new event, type=%RU32, rc=%Rrc\n", pEvent->Event.uType, rc)); rc = pWnd->ProcessEvent(pEvent); if (RT_SUCCESS(rc)) { /* Event was consumed and the proxy window till take care of the memory -- NULL it. */ pEvent = NULL; } else LogRel(("DnD: Processing proxy window event %RU32 on screen %RU32 failed with %Rrc\n", pEvent->Event.uType, pEvent->Event.uScreenId, rc)); } else if (rc == VERR_INTERRUPTED) /* Disconnected from service. */ { LogRel(("DnD: Received quit message, shutting down ...\n")); pWnd->PostMessage(WM_QUIT, 0 /* wParm */, 0 /* lParm */); rc = VINF_SUCCESS; } if (RT_FAILURE(rc)) { LogFlowFunc(("Processing next message failed with rc=%Rrc\n", rc)); /* Old(er) hosts either are broken regarding DnD support or otherwise * don't support the stuff we do on the guest side, so make sure we * don't process invalid messages forever. */ if (rc == VERR_INVALID_PARAMETER) cMsgSkippedInvalid++; if (cMsgSkippedInvalid > 32) { LogRel(("DnD: Too many invalid/skipped messages from host, exiting ...\n")); break; } /* Make sure our proxy window is hidden when an error occured to * not block the guest's UI. */ pWnd->hide(); int rc2 = VbglR3DnDGHSendError(&pCtx->cmdCtx, rc); if (RT_FAILURE(rc2)) { /* Ignore the following errors reported back from the host. */ if ( rc2 != VERR_NOT_SUPPORTED && rc2 != VERR_NOT_IMPLEMENTED) { LogRel(("DnD: Could not report error %Rrc back to host: %Rrc\n", rc, rc2)); } } } if (ASMAtomicReadBool(&pCtx->fShutdown)) break; if (RT_FAILURE(rc)) /* Don't hog the CPU on errors. */ RTThreadSleep(1000 /* ms */); } if (pEvent) { RTMemFree(pEvent); pEvent = NULL; } VbglR3DnDDisconnect(&pCtx->cmdCtx); LogRel(("DnD: Ended\n")); LogFlowFuncLeaveRC(rc); return rc; } /** * The service description. */ VBOXSERVICEDESC g_SvcDescDnD = { /* pszName. */ "draganddrop", /* pszDescription. */ "Drag and Drop", /* methods */ VBoxDnDInit, VBoxDnDWorker, VBoxDnDStop, VBoxDnDDestroy };