ghost.c File Reference

#include <win32k.h>
#include "ghostwnd.h"
#include <debug.h>

Include dependency graph for ghost.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
	DBG_DEFAULT_CHANNEL (UserInput)
VOID NTAPI	UserGhostThreadEntry (VOID)
BOOL FASTCALL	IntIsGhostWindow (PWND Window)
HWND FASTCALL	IntGhostWindowFromHungWindow (PWND pHungWnd)
HWND FASTCALL	UserGhostWindowFromHungWindow (HWND hwndHung)
HWND FASTCALL	IntHungWindowFromGhostWindow (PWND pGhostWnd)
HWND FASTCALL	UserHungWindowFromGhostWindow (HWND hwndGhost)
BOOL FASTCALL	IntMakeHungWindowGhosted (HWND hwndHung)

Variables
static UNICODE_STRING	GhostClass = RTL_CONSTANT_STRING(GHOSTCLASSNAME)
static UNICODE_STRING	GhostProp = RTL_CONSTANT_STRING(GHOST_PROP)
PTHREADINFO	gptiGhostThread = NULL

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file ghost.c.

Function Documentation

DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL

(

UserInput

)

IntGhostWindowFromHungWindow()

HWND FASTCALL IntGhostWindowFromHungWindow

(

PWND

pHungWnd

)

Definition at line 76 of file ghost.c.

{
    RTL_ATOM Atom;
    HWND hwndGhost;
 
    if (!IntGetAtomFromStringOrAtom(&GhostProp, &Atom))
        return NULL;
 
    hwndGhost = UserGetProp(pHungWnd, Atom, TRUE);
    if (hwndGhost)
    {
        if (ValidateHwndNoErr(hwndGhost))
            return hwndGhost;
 
        DPRINT("Not a window\n");
    }
 
    return NULL;
}

Referenced by IntMakeHungWindowGhosted(), and UserGhostWindowFromHungWindow().

IntHungWindowFromGhostWindow()

HWND FASTCALL IntHungWindowFromGhostWindow

(

PWND

pGhostWnd

)

Definition at line 107 of file ghost.c.

{
    const GHOST_DATA *UserData;
    HWND hwndTarget;
 
    if (!IntIsGhostWindow(pGhostWnd))
    {
        DPRINT("Not a ghost window\n");
        return NULL;
    }
 
    UserData = (const GHOST_DATA *)pGhostWnd->dwUserData;
    if (UserData)
    {
        _SEH2_TRY
        {
            ProbeForRead(UserData, sizeof(GHOST_DATA), 1);
            hwndTarget = UserData->hwndTarget;
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            DPRINT1("Exception!\n");
            hwndTarget = NULL;
        }
        _SEH2_END;
    }
    else
    {
        DPRINT("No user data\n");
        hwndTarget = NULL;
    }
 
    if (hwndTarget)
    {
        if (ValidateHwndNoErr(hwndTarget))
            return hwndTarget;
 
        DPRINT1("Not a window\n");
    }
 
    return NULL;
}

Referenced by UserHungWindowFromGhostWindow().

IntIsGhostWindow()

BOOL FASTCALL IntIsGhostWindow

(

PWND

Window

)

Definition at line 42 of file ghost.c.

{
    BOOLEAN Ret = FALSE;
    UNICODE_STRING ClassName;
    INT iCls, Len;
    RTL_ATOM Atom = 0;
 
    if (!Window)
        return FALSE;
 
    if (Window->fnid && !(Window->fnid & FNID_DESTROY))
    {
        if (LookupFnIdToiCls(Window->fnid, &iCls))
        {
            Atom = gpsi->atomSysClass[iCls];
        }
    }
 
    // check class name
    RtlInitUnicodeString(&ClassName, NULL);
    Len = UserGetClassName(Window->pcls, &ClassName, Atom, FALSE);
    if (Len > 0)
    {
        Ret = RtlEqualUnicodeString(&ClassName, &GhostClass, TRUE);
    }
    else
    {
        DPRINT1("Unable to get class name\n");
    }
    RtlFreeUnicodeString(&ClassName);
 
    return Ret;
}

Referenced by IntHungWindowFromGhostWindow(), and IntMakeHungWindowGhosted().

IntMakeHungWindowGhosted()

BOOL FASTCALL IntMakeHungWindowGhosted

(

HWND

hwndHung

)

Definition at line 156 of file ghost.c.

{
    PWND pHungWnd = ValidateHwndNoErr(hwndHung);
    if (!pHungWnd)
    {
        DPRINT1("Not a window\n");
        return FALSE;   // not a window
    }
 
    if (!MsqIsHung(pHungWnd->head.pti, MSQ_HUNG))
    {
        DPRINT1("Not hung window\n");
        return FALSE;   // not hung window
    }
 
    if (!(pHungWnd->style & WS_VISIBLE))
        return FALSE;   // invisible
 
    if (pHungWnd->style & WS_CHILD)
        return FALSE;   // child
 
    if (IntIsGhostWindow(pHungWnd))
    {
        DPRINT1("IntIsGhostWindow\n");
        return FALSE;   // ghost window cannot be ghosted
    }
 
    if (IntGhostWindowFromHungWindow(pHungWnd))
    {
        DPRINT("Already ghosting\n");
        return FALSE;   // already ghosting
    }
 
    // TODO: Find a way to pass the hwnd of pHungWnd to the ghost thread as we can't pass parameters directly
 
    if (!gptiGhostThread)
        UserCreateSystemThread(ST_GHOST_THREAD);
 
    return TRUE;
}

Referenced by co_IntSendMessageTimeoutSingle().

UserGhostThreadEntry()

VOID NTAPI UserGhostThreadEntry

(

VOID

)

Definition at line 27 of file ghost.c.

{
    TRACE("Ghost thread started\n");
 
    UserEnterExclusive();
 
    gptiGhostThread = PsGetCurrentThreadWin32Thread();
 
    //TODO: Implement. This thread should handle all ghost windows and exit when no ghost window is needed.
 
    gptiGhostThread = NULL;
 
    UserLeave();
}

Referenced by UserSystemThreadProc().

UserGhostWindowFromHungWindow()

HWND FASTCALL UserGhostWindowFromHungWindow

(

HWND

hwndHung

)

Definition at line 96 of file ghost.c.

{
    PWND pHungWnd = ValidateHwndNoErr(hwndHung);
    if (!pHungWnd)
    {
        DPRINT("Not a window\n");
        return NULL;
    }
    return IntGhostWindowFromHungWindow(pHungWnd);
}

UserHungWindowFromGhostWindow()

HWND FASTCALL UserHungWindowFromGhostWindow

(

HWND

hwndGhost

)

Definition at line 150 of file ghost.c.

{
    PWND pGhostWnd = ValidateHwndNoErr(hwndGhost);
    return IntHungWindowFromGhostWindow(pGhostWnd);
}

Variable Documentation

GhostClass

UNICODE_STRING GhostClass = RTL_CONSTANT_STRING(GHOSTCLASSNAME)

static

Definition at line 16 of file ghost.c.

Referenced by IntIsGhostWindow().

GhostProp

UNICODE_STRING GhostProp = RTL_CONSTANT_STRING(GHOST_PROP)

static

Definition at line 17 of file ghost.c.

Referenced by IntGhostWindowFromHungWindow().

gptiGhostThread

PTHREADINFO gptiGhostThread = NULL

Definition at line 19 of file ghost.c.

Referenced by IntMakeHungWindowGhosted(), and UserGhostThreadEntry().