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);
}


enum {
    CDLG_FILE_OPEN = 0,
    CDLG_FILE_SAVE = 1
};

/* 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 == CDLG_FILE_OPEN)
        open.Flags = OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST;
    else
        open.Flags = OFN_OVERWRITEPROMPT;

    if (id == CDLG_FILE_OPEN && GetOpenFileName (&open))
        return open.lpstrFile;
    else if (id == CDLG_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, CDLG_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, CDLG_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 @fname. */
DWORD
get_file_size (const char *fname)
{
    DWORD 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;
}


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