windows/focus.c

   1 /*
   2  * Focus functions
   3  *
   4  * Copyright 1993 David Metcalfe
   5  *           1994 Alexandre Julliard
   6  *           1995 Alex Korobka
   7  *
   8  */
   9
  10 #include "windef.h"
  11 #include "wingdi.h"
  12 #include "wine/winuser16.h"
  13 #include "win.h"
  14 #include "winpos.h"
  15 #include "hook.h"
  16 #include "message.h"
  17 #include "queue.h"
  18 #include "task.h"
  19 #include "debugtools.h"
  20
  21 DEFAULT_DEBUG_CHANNEL(win);
  22
  23
  24 /*****************************************************************
  25  *               FOCUS_SwitchFocus
  26  * pMsgQ is the queue whose perQData focus is to be modified
  27  */
  28 void FOCUS_SwitchFocus( MESSAGEQUEUE *pMsgQ, HWND hFocusFrom, HWND hFocusTo )
  29 {
  30     WND *pFocusTo = WIN_FindWndPtr( hFocusTo );
  31
  32     PERQDATA_SetFocusWnd( pMsgQ->pQData, hFocusTo );
  33
  34 #if 0
  35     if (hFocusFrom) SendMessageA( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  36 #else
  37     /* FIXME: must be SendMessage16() because 32A doesn't do
  38      * intertask at this time */
  39     if (hFocusFrom) SendMessage16( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  40 #endif
  41
  42     if( !pFocusTo || hFocusTo != PERQDATA_GetFocusWnd( pMsgQ->pQData ) )
  43     {
  44         WIN_ReleaseWndPtr(pFocusTo);
  45         return;
  46     }
  47
  48     /* According to API docs, the WM_SETFOCUS message is sent AFTER the window
  49        has received the keyboard focus. */
  50
  51     pFocusTo->pDriver->pSetFocus(pFocusTo);
  52
  53     WIN_ReleaseWndPtr(pFocusTo);
  54 #if 0
  55     SendMessageA( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  56 #else
  57     SendMessage16( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  58 #endif
  59 }
  60
  61
  62 /*****************************************************************
  63  *               SetFocus16   (USER.22)
  64  */
  65 HWND16 WINAPI SetFocus16( HWND16 hwnd )
  66 {
  67     return (HWND16)SetFocus( hwnd );
  68 }
  69
  70
  71 /*****************************************************************
  72  *               SetFocus   (USER32.481)
  73  */
  74 HWND WINAPI SetFocus( HWND hwnd )
  75 {
  76     HWND hWndFocus = 0, hwndTop = hwnd;
  77     WND *wndPtr = WIN_FindWndPtr( hwnd );
  78     MESSAGEQUEUE *pMsgQ = 0, *pCurMsgQ = 0;
  79     BOOL16 bRet = 0;
  80
  81     /* Get the messageQ for the current thread */
  82     if (!(pCurMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
  83     {
  84         WARN("\tCurrent message queue not found. Exiting!\n" );
  85         goto CLEANUP;
  86     }
  87
  88     if (wndPtr)
  89     {
  90           /* Check if we can set the focus to this window */
  91
  92         while ( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD  )
  93         {
  94             if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) )
  95                  goto CLEANUP;
  96             WIN_UpdateWndPtr(&wndPtr,wndPtr->parent);
  97             if (!wndPtr) goto CLEANUP;
  98             hwndTop = wndPtr->hwndSelf;
  99         }
 100
 101         /* definitely at the top window now */
 102         if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) ) goto CLEANUP;
 103
 104         /* Retrieve the message queue associated with this window */
 105         pMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( wndPtr->hmemTaskQ );
 106         if ( !pMsgQ )
 107         {
 108             WARN("\tMessage queue not found. Exiting!\n" );
 109             goto CLEANUP;
 110         }
 111
 112         /* Make sure that message queue for the window we are setting focus to
 113          * shares the same perQ data as the current threads message queue.
 114          * In other words you can't set focus to a window owned by a different
 115          * thread unless AttachThreadInput has been called previously.
 116          * (see AttachThreadInput and SetFocus docs)
 117          */
 118         if ( pCurMsgQ->pQData != pMsgQ->pQData )
 119             goto CLEANUP;
 120
 121         /* Get the current focus window from the perQ data */
 122         hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
 123
 124         if( hwnd == hWndFocus )
 125         {
 126             bRet = 1;      /* Success */
 127             goto CLEANUP;  /* Nothing to do */
 128         }
 129
 130         /* call hooks */
 131         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, (WPARAM16)hwnd,
 132                               (LPARAM)hWndFocus) )
 133             goto CLEANUP;
 134
 135         /* activate hwndTop if needed. */
 136         if (hwndTop != GetActiveWindow())
 137         {
 138             if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) goto CLEANUP;
 139
 140             if (!IsWindow( hwnd )) goto CLEANUP;  /* Abort if window destroyed */
 141         }
 142
 143         /* Get the current focus window from the perQ data */
 144         hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
 145
 146         /* Change focus and send messages */
 147         FOCUS_SwitchFocus( pMsgQ, hWndFocus, hwnd );
 148     }
 149     else /* NULL hwnd passed in */
 150     {
 151         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hWndFocus ) )
 152             goto CLEANUP;
 153
 154         /* Get the current focus from the perQ data of the current message Q */
 155         hWndFocus = PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
 156
 157       /* Change focus and send messages */
 158         FOCUS_SwitchFocus( pCurMsgQ, hWndFocus, hwnd );
 159     }
 160
 161     bRet = 1;      /* Success */
 162
 163 CLEANUP:
 164
 165     /* Unlock the queues before returning */
 166     if ( pMsgQ )
 167         QUEUE_Unlock( pMsgQ );
 168     if ( pCurMsgQ )
 169         QUEUE_Unlock( pCurMsgQ );
 170
 171     WIN_ReleaseWndPtr(wndPtr);
 172     return bRet ? hWndFocus : 0;
 173 }
 174
 175
 176 /*****************************************************************
 177  *               GetFocus16   (USER.23)
 178  */
 179 HWND16 WINAPI GetFocus16(void)
 180 {
 181     return (HWND16)GetFocus();
 182 }
 183
 184
 185 /*****************************************************************
 186  *               GetFocus   (USER32.240)
 187  */
 188 HWND WINAPI GetFocus(void)
 189 {
 190     MESSAGEQUEUE *pCurMsgQ = 0;
 191     HWND hwndFocus = 0;
 192
 193     /* Get the messageQ for the current thread */
 194     if (!(pCurMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
 195     {
 196         WARN("\tCurrent message queue not found. Exiting!\n" );
 197         return 0;
 198     }
 199
 200     /* Get the current focus from the perQ data of the current message Q */
 201     hwndFocus = PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
 202
 203     QUEUE_Unlock( pCurMsgQ );
 204
 205     return hwndFocus;
 206 }