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181 lines
5.3 KiB
C
181 lines
5.3 KiB
C
/*
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* Focus functions
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*
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* Copyright 1993 David Metcalfe
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* 1994 Alexandre Julliard
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* 1995 Alex Korobka
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "windef.h"
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#include "wingdi.h"
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#include "wine/winuser16.h"
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#include "win.h"
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#include "winpos.h"
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#include "hook.h"
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#include "message.h"
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#include "queue.h"
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#include "user.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(win);
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/*****************************************************************
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* FOCUS_SwitchFocus
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* pMsgQ is the queue whose perQData focus is to be modified
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*/
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void FOCUS_SwitchFocus( MESSAGEQUEUE *pMsgQ, HWND hFocusFrom, HWND hFocusTo )
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{
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PERQDATA_SetFocusWnd( pMsgQ->pQData, hFocusTo );
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if (hFocusFrom)
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SendNotifyMessageA( hFocusFrom, WM_KILLFOCUS, (WPARAM)hFocusTo, 0 );
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if( !hFocusTo || hFocusTo != PERQDATA_GetFocusWnd( pMsgQ->pQData ) )
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{
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return;
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}
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/* According to API docs, the WM_SETFOCUS message is sent AFTER the window
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has received the keyboard focus. */
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if (USER_Driver.pSetFocus) USER_Driver.pSetFocus(hFocusTo);
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SendMessageA( hFocusTo, WM_SETFOCUS, (WPARAM)hFocusFrom, 0 );
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}
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/*****************************************************************
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* SetFocus (USER32.@)
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*/
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HWND WINAPI SetFocus( HWND hwnd )
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{
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HWND hWndFocus = 0, hwndTop = hwnd;
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MESSAGEQUEUE *pMsgQ = 0, *pCurMsgQ = 0;
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BOOL bRet = 0;
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/* Get the messageQ for the current thread */
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if (!(pCurMsgQ = QUEUE_Current()))
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{
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WARN("\tCurrent message queue not found. Exiting!\n" );
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return 0;
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}
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if (hwnd)
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{
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/* Check if we can set the focus to this window */
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WND *wndPtr;
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hwnd = WIN_GetFullHandle( hwnd );
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for (;;)
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{
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HWND parent;
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LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
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if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
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parent = GetAncestor( hwndTop, GA_PARENT );
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if (!parent || parent == GetDesktopWindow()) break;
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hwndTop = parent;
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}
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if (!(wndPtr = WIN_FindWndPtr( hwndTop ))) return 0;
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/* Retrieve the message queue associated with this window */
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pMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( wndPtr->hmemTaskQ );
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WIN_ReleaseWndPtr( wndPtr );
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if ( !pMsgQ )
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{
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WARN("\tMessage queue not found. Exiting!\n" );
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return 0;
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}
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/* Make sure that message queue for the window we are setting focus to
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* shares the same perQ data as the current threads message queue.
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* In other words you can't set focus to a window owned by a different
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* thread unless AttachThreadInput has been called previously.
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* (see AttachThreadInput and SetFocus docs)
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*/
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if ( pCurMsgQ->pQData != pMsgQ->pQData )
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goto CLEANUP;
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/* Get the current focus window from the perQ data */
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hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
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if( hwnd == hWndFocus )
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{
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bRet = 1; /* Success */
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goto CLEANUP; /* Nothing to do */
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}
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/* call hooks */
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if( HOOK_CallHooksA( WH_CBT, HCBT_SETFOCUS, (WPARAM)hwnd, (LPARAM)hWndFocus) )
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goto CLEANUP;
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/* activate hwndTop if needed. */
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if (hwndTop != GetActiveWindow())
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{
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if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) goto CLEANUP;
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if (!IsWindow( hwnd )) goto CLEANUP; /* Abort if window destroyed */
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}
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/* Get the current focus window from the perQ data */
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hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
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/* Change focus and send messages */
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FOCUS_SwitchFocus( pMsgQ, hWndFocus, hwnd );
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}
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else /* NULL hwnd passed in */
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{
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if( HOOK_CallHooksA( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hWndFocus ) )
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return 0;
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/* Get the current focus from the perQ data of the current message Q */
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hWndFocus = PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
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/* Change focus and send messages */
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FOCUS_SwitchFocus( pCurMsgQ, hWndFocus, hwnd );
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}
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bRet = 1; /* Success */
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CLEANUP:
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/* Unlock the queues before returning */
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if ( pMsgQ )
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QUEUE_Unlock( pMsgQ );
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return bRet ? hWndFocus : 0;
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}
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/*****************************************************************
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* GetFocus (USER32.@)
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*/
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HWND WINAPI GetFocus(void)
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{
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MESSAGEQUEUE *pCurMsgQ = 0;
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/* Get the messageQ for the current thread */
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if (!(pCurMsgQ = QUEUE_Current()))
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{
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WARN("\tCurrent message queue not found. Exiting!\n" );
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return 0;
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}
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/* Get the current focus from the perQ data of the current message Q */
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return PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
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}
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