capture.c File Reference

#include "precomp.h"

Go to the source code of this file.

Functions
PWND	xxxSetCapture (PWND pwnd)
BOOL	xxxReleaseCapture (VOID)
VOID	xxxCapture (PTHREADINFO pti, PWND pwnd, UINT code)

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Function Documentation

VOID xxxCapture (  PTHREADINFO  pti, PWND  pwnd, UINT  code )

Definition at line 124 of file w32/ntuser/kernel/capture.c. References BEGINATOMICCHECK, CheckLock, CLIENT_CAPTURE, CLIENT_CAPTURE_INTERNAL, tagQ::codeCapture, DeferWinEventNotify, DF_TRACKMOUSEEVENT, tagDESKTOP::dwDTFlags, ENDATOMICCHECK, FALSE, FNID_DELETED_BIT, FULLSCREEN_CAPTURE, FWINABLE, GETPTI, gspwndInternalCapture, gspwndMouseOwner, gspwndScreenCapture, tagDESKTOP::htEx, HW, IsGlobalHooked, IsWinEventNotifyDeferredOK, Lock, LockCaptureWindow(), NO_CAP_CLIENT, NULL, tagTHREADINFO::pq, QF_CAPTURELOCKED, tagQ::QF_flags, tagQ::spwndCapture, tagDESKTOP::spwndTrack, TestWF, ThreadLockAlways, ThreadUnlock, Unlock, VOID(), WEF_USEPWNDTHREAD, WFWIN40COMPAT, WHF_FROM_WH, xxxCancelMouseMoveTracking(), xxxSendMessageCallback(), zzzEndDeferWinEventNotify, zzzSetFMouseMoved(), and zzzWindowEvent. Referenced by xxxCancelTrackingForThread(), xxxHelpLoop(), xxxMakeWindowForegroundWithState(), xxxMNSetCapture(), xxxMoveSize(), xxxOldNextWindow(), xxxReleaseCapture(), xxxSBTrackInit(), and xxxSetCapture(). { CheckLock(pwnd); UserAssert(IsWinEventNotifyDeferredOK()); if ((gspwndScreenCapture == NULL) || (code == FULLSCREEN_CAPTURE) || ((pwnd == NULL) && (code == NO_CAP_CLIENT) && (pti->pq != GETPTI(gspwndScreenCapture)->pq))) { PQ pq; PWND pwndCaptureOld = NULL; if (code == FULLSCREEN_CAPTURE) { if (pwnd) { Lock(&gspwndScreenCapture, pwnd); /* * We're going full screen so clear the mouse owner */ Unlock(&gspwndMouseOwner); } else { Unlock(&gspwndScreenCapture); } } /* * Internal capture works like Win 3.1 capture unlike the NT capture * which can be lost if the user clicks down on another application */ if (code == CLIENT_CAPTURE_INTERNAL) { Lock(&gspwndInternalCapture, pwnd); code = CLIENT_CAPTURE; } /* * Free the internal capture if the app (thread) that did the internal * capture is freeing the capture. */ if ((code == NO_CAP_CLIENT) && gspwndInternalCapture && (pti == GETPTI(gspwndInternalCapture))) { Unlock(&gspwndInternalCapture); } if ((pq = pti->pq) != NULL) { PDESKTOP pdesk = pti->rpdesk; UserAssert(!(pq->QF_flags & QF_CAPTURELOCKED)); /* * If someone is tracking mouse events in the client area and * we're setting or releasing an internal capture mode (!= CLIENT_CAPTURE), * then cancel tracking -- because we're either taking or relinquishing * control over the mouse. */ if ((pdesk->dwDTFlags & DF_TRACKMOUSEEVENT) && (pdesk->htEx == HTCLIENT) && ((pdesk->spwndTrack == pwnd) && (code != CLIENT_CAPTURE) || ((pdesk->spwndTrack == pq->spwndCapture) && (pq->codeCapture != CLIENT_CAPTURE)))) { BEGINATOMICCHECK(); xxxCancelMouseMoveTracking(pdesk->dwDTFlags, pdesk->spwndTrack, pdesk->htEx, DF_TRACKMOUSEEVENT); ENDATOMICCHECK(); } pwndCaptureOld = pq->spwndCapture; LockCaptureWindow(pq, pwnd); pq->codeCapture = code; } else { /* * A thread without a queue? */ UserAssert(pti->pq != NULL); } /* * If there was a capture window and we're releasing it, post * a WM_MOUSEMOVE to the window we're over so they can know about * the current mouse position. * Defer WinEvent notifications to protect pwndCaptureOld */ DeferWinEventNotify(); if (pwnd == NULL && pwndCaptureOld != NULL) { #ifdef REDIRECTION if (!IsGlobalHooked(pti, WHF_FROM_WH(WH_HITTEST))) #endif zzzSetFMouseMoved(); } if (FWINABLE()) { if (pwndCaptureOld) { zzzWindowEvent(EVENT_SYSTEM_CAPTUREEND, pwndCaptureOld, OBJID_WINDOW, INDEXID_CONTAINER, WEF_USEPWNDTHREAD); } if (pwnd) { zzzWindowEvent(EVENT_SYSTEM_CAPTURESTART, pwnd, OBJID_WINDOW, INDEXID_CONTAINER, WEF_USEPWNDTHREAD); } } /* * New for win95 - send WM_CAPTURECHANGED. * * The FNID_DELETED_BIT is set in xxxFreeWindow which means we * DON'T want to send the message. */ if (pwndCaptureOld && TestWF(pwndCaptureOld, WFWIN40COMPAT) && !(pwndCaptureOld->fnid & FNID_DELETED_BIT)) { TL tlpwnd; /* * If we are in menu mode and just set capture, * don't let them take it from us during this * callback. */ if ((pti->pMenuState != NULL) && (pwnd != NULL)) { pq->QF_flags |= QF_CAPTURELOCKED; } ThreadLockAlways(pwndCaptureOld, &tlpwnd); zzzEndDeferWinEventNotify(); xxxSendMessageCallback(pwndCaptureOld, WM_CAPTURECHANGED, FALSE, (LPARAM)HW(pwnd), NULL, 0, FALSE); /* The thread's queue may have changed during the callback, * so we need to refresh the local. Bug #377795 */ pq = pti->pq; UserAssert(pq != NULL); ThreadUnlock(&tlpwnd); /* * Release the temporary lock, if any */ pq->QF_flags &= ~QF_CAPTURELOCKED; } else { zzzEndDeferWinEventNotify(); } } }

BOOL xxxReleaseCapture (  VOID   )

Definition at line 78 of file w32/ntuser/kernel/capture.c. References BOOL, DDR_ENDCANCEL, FALSE, _MOVESIZEDATA::fDragFullWindows, gpDispInfo, tagDISPLAYINFO::hDev, NO_CAP_CLIENT, NULL, tagTHREADINFO::pmsd, tagTHREADINFO::pq, PtiCurrent, QF_CAPTURELOCKED, tagQ::QF_flags, tagTHREADINFO::TIF_flags, TIF_MOVESIZETRACKING, TIF_TRACKRECTVISIBLE, TRUE, xxxCapture(), and xxxDrawDragRect(). Referenced by xxxDefWindowProc(), xxxDragObject(), xxxDWP_DoCancelMode(), xxxEndScroll(), xxxFreeWindow(), xxxHelpLoop(), xxxIsDragging(), xxxMNReleaseCapture(), xxxMS_TrackMove(), xxxOldNextWindow(), xxxTrackCaptionButton(), and xxxTrackInitSize(). { PTHREADINFO ptiCurrent = PtiCurrent(); /* * If the capture is locked, bail */ if (ptiCurrent->pq->QF_flags & QF_CAPTURELOCKED) { RIPMSG0(RIP_WARNING, "xxxReleaseCapture: Capture is locked"); return FALSE; } /* * If we're releasing the capture from a window during tracking, * cancel tracking first. */ if (ptiCurrent->pmsd != NULL) { /* * Only remove the tracking rectangle if it's * been made visible. */ if (ptiCurrent->TIF_flags & TIF_TRACKRECTVISIBLE) { bSetDevDragRect(gpDispInfo->hDev, NULL, NULL); if (!(ptiCurrent->pmsd->fDragFullWindows)) xxxDrawDragRect(ptiCurrent->pmsd, NULL, DDR_ENDCANCEL); ptiCurrent->TIF_flags &= ~(TIF_TRACKRECTVISIBLE | TIF_MOVESIZETRACKING); } } xxxCapture(ptiCurrent, NULL, NO_CAP_CLIENT); return TRUE; }

PWND xxxSetCapture (  PWND  pwnd  )

Definition at line 23 of file w32/ntuser/kernel/capture.c. References CLIENT_CAPTURE, GETPTI, gspwndScreenCapture, HW, NULL, PtiCurrent, QF_CAPTURELOCKED, tagQ::QF_flags, RevalidateHwnd, tagQ::spwndCapture, and xxxCapture(). Referenced by NtUserSetCapture(), xxxDefWindowProc(), xxxDragObject(), xxxIsDragging(), and xxxTrackCaptionButton(). { PQ pq; PWND pwndCaptureOld; HWND hwndCaptureOld; PTHREADINFO ptiCurrent = PtiCurrent(); pq = (PQ)PtiCurrent()->pq; /* * If the capture is locked, bail */ if (pq->QF_flags & QF_CAPTURELOCKED) { RIPMSG2(RIP_WARNING, "xxxSetCapture(%#p): Capture is locked. pq:%#p", pwnd, pq); return NULL; } /* * Don't allow the app to set capture to a window * from another queue. */ if ((pwnd != NULL) && GETPTI(pwnd)->pq != pq) return NULL; /* * If full screen capture don't allow any other capture */ if (gspwndScreenCapture) return NULL; pwndCaptureOld = pq->spwndCapture; hwndCaptureOld = HW(pwndCaptureOld); xxxCapture(ptiCurrent, pwnd, CLIENT_CAPTURE); if (hwndCaptureOld != NULL) { if (RevalidateHwnd(hwndCaptureOld)) return pwndCaptureOld; } return NULL; }

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