trunk/Src/wptW32API.cpp

/* wptW32API.cpp - Common W32 API functions
 *      Copyright (C) 2001, 2002, 2003 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <shellapi.h>
#include <shlobj.h>
#include <commctrl.h>

#include "wptNLS.h"
#include "wptW32API.h"
#include "wptErrors.h"
#include "wptVersion.h"
#include "wptTypes.h"


extern "C" void _SHFree (void *p);


static void
set_menu_text_ext (HMENU menu, int by_pos, int m_uid, const char *text)
{
    MENUITEMINFO mii;
    
    memset (&mii, 0, sizeof mii);
    mii.cbSize = sizeof mii;
    mii.fMask = MIIM_TYPE;
    mii.fType = MFT_STRING;
    mii.dwTypeData = (char *) text;
    SetMenuItemInfo (menu, m_uid, by_pos? TRUE : FALSE, &mii);
}


/* Set the text of a menu item @m_uid to @text. */
void
set_menu_text (HMENU menu, int m_uid, const char *text)
{
    set_menu_text_ext (menu, 0, m_uid, text);
}


/* Set the text of a menu item with the position @pos to @text. */
void
set_menu_text_bypos (HMENU menu, int pos, const char *text)
{
    set_menu_text_ext (menu, 1, pos, text);
}


/* Set the state of a menu item @m_uid to @state. */
void
set_menu_state (HMENU menu, int m_uid, int state)
{       
    MENUITEMINFO mii;

    memset( &mii, 0, sizeof (mii) );
    mii.cbSize = sizeof (mii);
    mii.fMask = MIIM_STATE;
    mii.fState = state;
    SetMenuItemInfo (menu, m_uid, FALSE, &mii);
}


/* Use the common dialog to request a file from the user. 
   id can be either FILE_OPEN or FILE_SAVE. 
   The return value is the file name or NULL if cancel was chosen. */
const char *
get_filename_dlg (HWND hwnd, int id, const char * title, 
                  const char * filter, const char * name)
{
    static char file[512] = "";
    OPENFILENAME open;
    
    if (name && strlen (name) < (sizeof (file)-1))
        strcpy (file, name);
    else
        memset (file, 0, sizeof (file));
    if (!filter)
        filter = _("All Files (*.*)\0*.*\0\0");
    /* XXX: problem with gettext because of the 'artificial' 
            double string termination!. */
    memset (&open, 0, sizeof (open));
    open.lStructSize = sizeof (OPENFILENAME);
    open.hInstance = glob_hinst;
    open.lpstrTitle = title;
    open.lpstrFilter = filter;
    open.hwndOwner = hwnd;
    open.lpstrFile = file;
    open.nMaxFile = sizeof (file) - 1;
    if (id == FILE_OPEN)
        open.Flags = OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST;
    else
        open.Flags = OFN_OVERWRITEPROMPT;

    if (id == FILE_OPEN && GetOpenFileName (&open))
        return open.lpstrFile;
    else if (id == FILE_SAVE && GetSaveFileName (&open))
        return open.lpstrFile;
    
    return NULL;
}

const char*
get_filesave_dlg (HWND hwnd, const char *title,
                  const char *filter, const char *name)
{
    return get_filename_dlg (hwnd, FILE_SAVE, title, filter, name);
}

const char *
get_fileopen_dlg (HWND hwnd, const char *title, const char *filter,
                  const char *name)
{
    return get_filename_dlg (hwnd, FILE_OPEN, title, filter, name);
}


/* Use the common dialog to allow the user to select a folder.
   The return value is either the folder path or NULL if cancel was chosen. */
const char*
get_folder_dlg (HWND hwnd, const char * title, const char * name)
{
    static char folder[MAX_PATH+1] = "";
    BROWSEINFO bi;
    ITEMIDLIST * il;

    memset (&bi, 0, sizeof (bi));
    bi.hwndOwner = hwnd;
    if (title)
        bi.lpszTitle = title;
    if (name && strlen (name) < MAX_PATH-1)
        strcpy (folder, name);
    else
        memset (folder, 0, sizeof (folder));
    il = SHBrowseForFolder (&bi);
    if (il) {
        SHGetPathFromIDList (il, folder);
        _SHFree (il);
        return folder;
    }
    return NULL;
}


/* Return the clipboard contents as a string or NULL
   if the clipboard does not contain text. */
char*
get_clip_text (HWND hwnd)
{
    HANDLE clipmem;
    char *cliptxt, *p;  
    int len;
    
    if (OpenClipboard (hwnd) == FALSE)
        return NULL;
    clipmem = GetClipboardData (CF_TEXT);
    if (clipmem == NULL) {
        p = NULL;
        goto leave;
    }
    cliptxt = (char *) GlobalLock (clipmem);
    if (cliptxt == NULL) {
        p = NULL;
        goto leave;
    }
    
    len =  strlen (cliptxt);
    p = new char[len + 1];
    if (!p)
        BUG (NULL);
    memcpy (p, cliptxt, len);
    p[len] = '\0';
    GlobalUnlock (clipmem);
    
leave:
    CloseClipboard ();
    return p;
}


/* Set @text as the new clipboard content. */
int
set_clip_text (HWND hwnd, const char *text, int nbytes)
{    
    HANDLE clipmem;
    int rc = 0;
    char *p;
    
    if (OpenClipboard (hwnd) == FALSE)  
        return WPTERR_CLIP_OPEN;
    EmptyClipboard ();

    clipmem = GlobalAlloc (GHND, nbytes + 1);
    if (clipmem == NULL)
        BUG (NULL);
    p = (char *) GlobalLock (clipmem);
    if (p == NULL) {
        rc = WPTERR_GENERAL;;
        goto leave;     
    }
    memcpy (p, text, nbytes);
    p[nbytes] = '\0';
    
    GlobalUnlock (clipmem);
    SetClipboardData (CF_TEXT, clipmem);
    
leave:
    CloseClipboard ();
    return rc;
} /* set_clip_text */


/* Append or prepend some text to the clipboard contents.
   If as_footer = 1, append the text otherwise prepend. */
int
set_clip_text2 (HWND hwnd, const char *text, int nbytes, int as_footer)
{
    char *p, *new_text;

    p = get_clip_text (hwnd);
    if (!p)
        return WPTERR_CLIP_GET;
    new_text = new char [strlen (p)+strlen (text)+8];
    if (!new_text)
        BUG (0);
    if (as_footer == 0)
        sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
    else
        sprintf (new_text, "%s\n%s\n\n", p, text);
    set_clip_text (hwnd, new_text, strlen (new_text)+1);
    free_if_alloc (p);
    free_if_alloc (new_text);
    return 0;
}


/* Make a file name out of the path, the file and an extension. */
char*
make_filename (const char *path, const char *file, const char *ext)
{
    char *p;
    size_t size = 0;

    if( path && *path )
        size += strlen( path );
    if( file && *file )
        size += strlen( file );
    if( ext && *ext )
        size += strlen( ext );
    p = new char[size + 4];
    memset( p, 0, size );
    if( path ) {
        strcat( p, path );
        if( path[strlen( path ) -1] != '\\' )
            strcat( p, "\\" );
    }
    if( file )
        strcat( p, file );
    if( ext ) {
        strcat( p, "." );
        strcat( p, ext );
    }
    return p;
} /* make_filename */


/* return 0 if it exists, otherwise >0. */
int
file_exist_check (const char * fname)
{
    struct stat st;
    if (stat (fname, &st) == -1)
        return WPTERR_FILE_EXIST;
    return 0;
}


/* Check if the current folder exists.
   Return 0 for success. */
int
dir_exist_check (const char *dir)
{
    struct stat statbuf;    
    
    if( stat( dir, &statbuf ) == -1 )
        return WPTERR_GENERAL;
    if( statbuf.st_mode & _S_IFDIR )
        return 0;
    return WPTERR_GENERAL;
}


/* Return the file size of the given file. */
size_t
get_file_size (const char *fname)
{
    size_t fsize;
    HANDLE fh;

    fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
                    NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); 
    if( fh == INVALID_HANDLE_VALUE )
        return 0;
    fsize = GetFileSize( fh, NULL );
    if( fsize == 0xFFFFFFFF )
        fsize = 0;
    CloseHandle( fh );
    return fsize;
} /* get_file_size */


int
init_file_lock( LOCK *ctx, const char *file )
{
    
    ctx->size = get_file_size( file );
    ctx->file = m_strdup( file );
    ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL, 
                         OPEN_ALWAYS, 0, NULL );
    if( ctx->fh == INVALID_HANDLE_VALUE )
        return WPTERR_GENERAL;
    if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
        CloseHandle( ctx->fh );
        ctx->fh = INVALID_HANDLE_VALUE;
        ctx->size = 0;
        free( ctx->file );
        return WPTERR_GENERAL;
    }
    return 0;
} /* init_file_lock */


void
release_file_lock( LOCK *ctx )
{
    free_if_alloc( ctx->file );
    ctx->file = NULL;
    ctx->size = 0;
    CloseHandle( ctx->fh );
} /* release_file_lock */


/* Start a dialog with the exception that before it is checked that the
   dialog is not already openened. */
int
dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc, 
                                  LPARAM param, LPCTSTR title, int title_id )
{
    #ifndef LANG_DE
    if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
        return -1;      
    #else
    char strdesc[256];
    LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
    if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
        return -1;
    #endif
    
    return DialogBoxParam( hinst, name, parent, fnc, param );
} /* dialog_box_param */


/* Wrapper for message box which forces the message box into the
   foreground and it is displayed always on top. */
int
msg_box (HWND hwnd, const char *text, const char *title, int mode)
{
    mode |= MB_SETFOREGROUND;
    mode |= MB_TASKMODAL;
    mode |= MB_TOPMOST;
    return MessageBox(hwnd, text, title, mode);
}


void
set_active_window( HWND dlg)
{       
    activ_hwnd = dlg;
} /* set_active_window */

void
reset_active_window( void )
{       
    activ_hwnd = NULL;
} /* reset_active_window */


static DWORD CALLBACK 
reminder_thread (void *ctx)
{
    reminder_ctx_s *c = (reminder_ctx_s *)ctx;

    Sleep( c->msecs );
    SetForegroundWindow( activ_hwnd );

    return 0;
} /* reminder_thread */


HANDLE
window_reminder( struct reminder_ctx_s *ctx )
{
    DWORD tid = 0;
    
    return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
} /* window_reminder */


char*
m_strdup (const char *str)
{
    char * p = new char[strlen (str) + 1];
    if (p)
        strcpy (p, str);
    return p;
} /* m_strdup */


/* Center the hwndChild relative to parent.
   The style param allows to specificy additional styles (like topmost). */
void
center_window2 (HWND hwndChild, HWND parent, HWND style) 
{     
    HWND hwndParent;
    RECT rChild, rParent;    
    HDC hdc;
    int wChild, hChild, wParent, hParent;     
    int wScreen, hScreen, xNew, yNew;
    int flags = SWP_NOSIZE | SWP_NOZORDER;

    hwndParent = parent;
    if (hwndParent == NULL)
        hwndParent = GetDesktopWindow ();
    GetWindowRect (hwndChild, &rChild);     
    wChild = rChild.right - rChild.left;     
    hChild = rChild.bottom - rChild.top;

    GetWindowRect (hwndParent, &rParent);     
    wParent = rParent.right - rParent.left;     
    hParent = rParent.bottom - rParent.top;      
    
    hdc = GetDC (hwndChild);     
    wScreen = GetDeviceCaps (hdc, HORZRES);     
    hScreen = GetDeviceCaps (hdc, VERTRES);     
    ReleaseDC (hwndChild, hdc);      
    xNew = rParent.left + ((wParent - wChild) /2);     
    if (xNew < 0)
        xNew = 0;
    else if ((xNew+wChild) > wScreen) 
        xNew = wScreen - wChild;
    yNew = rParent.top  + ((hParent - hChild) /2);
    if (yNew < 0)
        yNew = 0;
    else if ((yNew+hChild) > hScreen)
        yNew = hScreen - hChild;
    if (style == HWND_TOPMOST || style == HWND_NOTOPMOST)
        flags = SWP_NOMOVE | SWP_NOSIZE;
    SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
}


/* Center the given hwndChild window with no special style. */
void
center_window (HWND hwndChild, HWND hwndParent) 
{
    center_window2 (hwndChild, hwndParent, NULL);
}
1	werner	36	/* wptW32API.cpp - Common W32 API functions
2			* Copyright (C) 2001, 2002, 2003 Timo Schulz
3			*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include <config.h>
23			#endif
24
25			#include <windows.h>
26			#include <stdio.h>
27			#include <sys/types.h>
28			#include <sys/stat.h>
29			#include <shellapi.h>
30			#include <shlobj.h>
31			#include <commctrl.h>
32
33			#include "wptNLS.h"
34			#include "wptW32API.h"
35			#include "wptErrors.h"
36			#include "wptVersion.h"
37			#include "wptTypes.h"
38
39
40			extern "C" void _SHFree (void *p);
41
42
43			static void
44			set_menu_text_ext (HMENU menu, int by_pos, int m_uid, const char *text)
45			{
46			MENUITEMINFO mii;
47
48			memset (&mii, 0, sizeof mii);
49			mii.cbSize = sizeof mii;
50			mii.fMask = MIIM_TYPE;
51			mii.fType = MFT_STRING;
52			mii.dwTypeData = (char *) text;
53			SetMenuItemInfo (menu, m_uid, by_pos? TRUE : FALSE, &mii);
54			}
55
56
57			/* Set the text of a menu item @m_uid to @text. */
58			void
59			set_menu_text (HMENU menu, int m_uid, const char *text)
60			{
61			set_menu_text_ext (menu, 0, m_uid, text);
62			}
63
64
65			/* Set the text of a menu item with the position @pos to @text. */
66			void
67			set_menu_text_bypos (HMENU menu, int pos, const char *text)
68			{
69			set_menu_text_ext (menu, 1, pos, text);
70			}
71
72
73			/* Set the state of a menu item @m_uid to @state. */
74			void
75			set_menu_state (HMENU menu, int m_uid, int state)
76			{
77			MENUITEMINFO mii;
78
79			memset( &mii, 0, sizeof (mii) );
80			mii.cbSize = sizeof (mii);
81			mii.fMask = MIIM_STATE;
82			mii.fState = state;
83			SetMenuItemInfo (menu, m_uid, FALSE, &mii);
84			}
85
86
87
88			/* Use the common dialog to request a file from the user.
89			id can be either FILE_OPEN or FILE_SAVE.
90			The return value is the file name or NULL if cancel was chosen. */
91			const char *
92			get_filename_dlg (HWND hwnd, int id, const char * title,
93			const char * filter, const char * name)
94			{
95			static char file[512] = "";
96			OPENFILENAME open;
97
98			if (name && strlen (name) < (sizeof (file)-1))
99			strcpy (file, name);
100			else
101			memset (file, 0, sizeof (file));
102			if (!filter)
103			filter = _("All Files (.)\0.\0\0");
104			/* XXX: problem with gettext because of the 'artificial'
105			double string termination!. */
106			memset (&open, 0, sizeof (open));
107			open.lStructSize = sizeof (OPENFILENAME);
108			open.hInstance = glob_hinst;
109			open.lpstrTitle = title;
110			open.lpstrFilter = filter;
111			open.hwndOwner = hwnd;
112			open.lpstrFile = file;
113			open.nMaxFile = sizeof (file) - 1;
114			if (id == FILE_OPEN)
115			open.Flags = OFN_FILEMUSTEXIST\|OFN_PATHMUSTEXIST;
116			else
117			open.Flags = OFN_OVERWRITEPROMPT;
118
119			if (id == FILE_OPEN && GetOpenFileName (&open))
120			return open.lpstrFile;
121			else if (id == FILE_SAVE && GetSaveFileName (&open))
122			return open.lpstrFile;
123
124			return NULL;
125			}
126
127			const char*
128			get_filesave_dlg (HWND hwnd, const char *title,
129			const char filter, const char name)
130			{
131			return get_filename_dlg (hwnd, FILE_SAVE, title, filter, name);
132			}
133
134			const char *
135			get_fileopen_dlg (HWND hwnd, const char title, const char filter,
136			const char *name)
137			{
138			return get_filename_dlg (hwnd, FILE_OPEN, title, filter, name);
139			}
140
141
142			/* Use the common dialog to allow the user to select a folder.
143			The return value is either the folder path or NULL if cancel was chosen. */
144			const char*
145			get_folder_dlg (HWND hwnd, const char * title, const char * name)
146			{
147			static char folder[MAX_PATH+1] = "";
148			BROWSEINFO bi;
149			ITEMIDLIST * il;
150
151			memset (&bi, 0, sizeof (bi));
152			bi.hwndOwner = hwnd;
153			if (title)
154			bi.lpszTitle = title;
155			if (name && strlen (name) < MAX_PATH-1)
156			strcpy (folder, name);
157			else
158			memset (folder, 0, sizeof (folder));
159			il = SHBrowseForFolder (&bi);
160			if (il) {
161			SHGetPathFromIDList (il, folder);
162			_SHFree (il);
163			return folder;
164			}
165			return NULL;
166			}
167
168
169			/* Return the clipboard contents as a string or NULL
170			if the clipboard does not contain text. */
171			char*
172			get_clip_text (HWND hwnd)
173			{
174			HANDLE clipmem;
175			char cliptxt, p;
176			int len;
177
178			if (OpenClipboard (hwnd) == FALSE)
179			return NULL;
180			clipmem = GetClipboardData (CF_TEXT);
181			if (clipmem == NULL) {
182			p = NULL;
183			goto leave;
184			}
185			cliptxt = (char *) GlobalLock (clipmem);
186			if (cliptxt == NULL) {
187			p = NULL;
188			goto leave;
189			}
190
191			len = strlen (cliptxt);
192			p = new char[len + 1];
193			if (!p)
194			BUG (NULL);
195			memcpy (p, cliptxt, len);
196			p[len] = '\0';
197			GlobalUnlock (clipmem);
198
199			leave:
200			CloseClipboard ();
201			return p;
202			}
203
204
205			/* Set @text as the new clipboard content. */
206			int
207			set_clip_text (HWND hwnd, const char *text, int nbytes)
208			{
209			HANDLE clipmem;
210			int rc = 0;
211			char *p;
212
213			if (OpenClipboard (hwnd) == FALSE)
214			return WPTERR_CLIP_OPEN;
215			EmptyClipboard ();
216
217			clipmem = GlobalAlloc (GHND, nbytes + 1);
218			if (clipmem == NULL)
219			BUG (NULL);
220			p = (char *) GlobalLock (clipmem);
221			if (p == NULL) {
222			rc = WPTERR_GENERAL;;
223			goto leave;
224			}
225			memcpy (p, text, nbytes);
226			p[nbytes] = '\0';
227
228			GlobalUnlock (clipmem);
229			SetClipboardData (CF_TEXT, clipmem);
230
231			leave:
232			CloseClipboard ();
233			return rc;
234			} /* set_clip_text */
235
236
237			/* Append or prepend some text to the clipboard contents.
238			If as_footer = 1, append the text otherwise prepend. */
239			int
240			set_clip_text2 (HWND hwnd, const char *text, int nbytes, int as_footer)
241			{
242			char p, new_text;
243
244			p = get_clip_text (hwnd);
245			if (!p)
246			return WPTERR_CLIP_GET;
247			new_text = new char [strlen (p)+strlen (text)+8];
248			if (!new_text)
249			BUG (0);
250			if (as_footer == 0)
251			sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
252			else
253			sprintf (new_text, "%s\n%s\n\n", p, text);
254			set_clip_text (hwnd, new_text, strlen (new_text)+1);
255			free_if_alloc (p);
256			free_if_alloc (new_text);
257			return 0;
258			}
259
260
261			/* Make a file name out of the path, the file and an extension. */
262			char*
263			make_filename (const char path, const char file, const char *ext)
264			{
265			char *p;
266			size_t size = 0;
267
268			if( path && *path )
269			size += strlen( path );
270			if( file && *file )
271			size += strlen( file );
272			if( ext && *ext )
273			size += strlen( ext );
274			p = new char[size + 4];
275			memset( p, 0, size );
276			if( path ) {
277			strcat( p, path );
278			if( path[strlen( path ) -1] != '\\' )
279			strcat( p, "\\" );
280			}
281			if( file )
282			strcat( p, file );
283			if( ext ) {
284			strcat( p, "." );
285			strcat( p, ext );
286			}
287			return p;
288			} /* make_filename */
289
290
291			/* return 0 if it exists, otherwise >0. */
292			int
293			file_exist_check (const char * fname)
294			{
295			struct stat st;
296			if (stat (fname, &st) == -1)
297			return WPTERR_FILE_EXIST;
298			return 0;
299			}
300
301
302			/* Check if the current folder exists.
303			Return 0 for success. */
304			int
305			dir_exist_check (const char *dir)
306			{
307			struct stat statbuf;
308
309			if( stat( dir, &statbuf ) == -1 )
310			return WPTERR_GENERAL;
311			if( statbuf.st_mode & _S_IFDIR )
312			return 0;
313			return WPTERR_GENERAL;
314			}
315
316
317			/* Return the file size of the given file. */
318			size_t
319			get_file_size (const char *fname)
320			{
321			size_t fsize;
322			HANDLE fh;
323
324			fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
325			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
326			if( fh == INVALID_HANDLE_VALUE )
327			return 0;
328			fsize = GetFileSize( fh, NULL );
329			if( fsize == 0xFFFFFFFF )
330			fsize = 0;
331			CloseHandle( fh );
332			return fsize;
333			} /* get_file_size */
334
335
336			int
337			init_file_lock( LOCK ctx, const char file )
338			{
339
340			ctx->size = get_file_size( file );
341			ctx->file = m_strdup( file );
342			ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL,
343			OPEN_ALWAYS, 0, NULL );
344			if( ctx->fh == INVALID_HANDLE_VALUE )
345			return WPTERR_GENERAL;
346			if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
347			CloseHandle( ctx->fh );
348			ctx->fh = INVALID_HANDLE_VALUE;
349			ctx->size = 0;
350			free( ctx->file );
351			return WPTERR_GENERAL;
352			}
353			return 0;
354			} /* init_file_lock */
355
356
357			void
358			release_file_lock( LOCK *ctx )
359			{
360			free_if_alloc( ctx->file );
361			ctx->file = NULL;
362			ctx->size = 0;
363			CloseHandle( ctx->fh );
364			} /* release_file_lock */
365
366
367			/* Start a dialog with the exception that before it is checked that the
368			dialog is not already openened. */
369			int
370			dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc,
371			LPARAM param, LPCTSTR title, int title_id )
372			{
373			#ifndef LANG_DE
374			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
375			return -1;
376			#else
377			char strdesc[256];
378			LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
379			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
380			return -1;
381			#endif
382
383			return DialogBoxParam( hinst, name, parent, fnc, param );
384			} /* dialog_box_param */
385
386
387			/* Wrapper for message box which forces the message box into the
388			foreground and it is displayed always on top. */
389			int
390			msg_box (HWND hwnd, const char text, const char title, int mode)
391			{
392			mode \|= MB_SETFOREGROUND;
393			mode \|= MB_TASKMODAL;
394			mode \|= MB_TOPMOST;
395			return MessageBox(hwnd, text, title, mode);
396			}
397
398
399			void
400			set_active_window( HWND dlg)
401			{
402			activ_hwnd = dlg;
403			} /* set_active_window */
404
405			void
406			reset_active_window( void )
407			{
408			activ_hwnd = NULL;
409			} /* reset_active_window */
410
411
412			static DWORD CALLBACK
413			reminder_thread (void *ctx)
414			{
415			reminder_ctx_s c = (reminder_ctx_s )ctx;
416
417			Sleep( c->msecs );
418			SetForegroundWindow( activ_hwnd );
419
420			return 0;
421			} /* reminder_thread */
422
423
424			HANDLE
425			window_reminder( struct reminder_ctx_s *ctx )
426			{
427			DWORD tid = 0;
428
429			return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
430			} /* window_reminder */
431
432
433			char*
434			m_strdup (const char *str)
435			{
436			char * p = new char[strlen (str) + 1];
437			if (p)
438			strcpy (p, str);
439			return p;
440			} /* m_strdup */
441
442
443			/* Center the hwndChild relative to parent.
444			The style param allows to specificy additional styles (like topmost). */
445			void
446			center_window2 (HWND hwndChild, HWND parent, HWND style)
447			{
448			HWND hwndParent;
449			RECT rChild, rParent;
450			HDC hdc;
451			int wChild, hChild, wParent, hParent;
452			int wScreen, hScreen, xNew, yNew;
453			int flags = SWP_NOSIZE \| SWP_NOZORDER;
454
455			hwndParent = parent;
456			if (hwndParent == NULL)
457			hwndParent = GetDesktopWindow ();
458			GetWindowRect (hwndChild, &rChild);
459			wChild = rChild.right - rChild.left;
460			hChild = rChild.bottom - rChild.top;
461
462			GetWindowRect (hwndParent, &rParent);
463			wParent = rParent.right - rParent.left;
464			hParent = rParent.bottom - rParent.top;
465
466			hdc = GetDC (hwndChild);
467			wScreen = GetDeviceCaps (hdc, HORZRES);
468			hScreen = GetDeviceCaps (hdc, VERTRES);
469			ReleaseDC (hwndChild, hdc);
470			xNew = rParent.left + ((wParent - wChild) /2);
471			if (xNew < 0)
472			xNew = 0;
473			else if ((xNew+wChild) > wScreen)
474			xNew = wScreen - wChild;
475			yNew = rParent.top + ((hParent - hChild) /2);
476			if (yNew < 0)
477			yNew = 0;
478			else if ((yNew+hChild) > hScreen)
479			yNew = hScreen - hChild;
480			if (style == HWND_TOPMOST \|\| style == HWND_NOTOPMOST)
481			flags = SWP_NOMOVE \| SWP_NOSIZE;
482			SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
483			}
484
485
486			/* Center the given hwndChild window with no special style. */
487			void
488			center_window (HWND hwndChild, HWND hwndParent)
489			{
490			center_window2 (hwndChild, hwndParent, NULL);
491			}