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 )
{
    #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	twoaday	77	enum {
88			CDLG_FILE_OPEN = 0,
89			CDLG_FILE_SAVE = 1
90			};
91	werner	36
92			/* Use the common dialog to request a file from the user.
93			id can be either FILE_OPEN or FILE_SAVE.
94			The return value is the file name or NULL if cancel was chosen. */
95			const char *
96			get_filename_dlg (HWND hwnd, int id, const char * title,
97			const char * filter, const char * name)
98			{
99			static char file[512] = "";
100			OPENFILENAME open;
101
102			if (name && strlen (name) < (sizeof (file)-1))
103			strcpy (file, name);
104			else
105			memset (file, 0, sizeof (file));
106			if (!filter)
107			filter = _("All Files (.)\0.\0\0");
108			/* XXX: problem with gettext because of the 'artificial'
109			double string termination!. */
110			memset (&open, 0, sizeof (open));
111			open.lStructSize = sizeof (OPENFILENAME);
112			open.hInstance = glob_hinst;
113			open.lpstrTitle = title;
114			open.lpstrFilter = filter;
115			open.hwndOwner = hwnd;
116			open.lpstrFile = file;
117			open.nMaxFile = sizeof (file) - 1;
118	twoaday	77	if (id == CDLG_FILE_OPEN)
119	werner	36	open.Flags = OFN_FILEMUSTEXIST\|OFN_PATHMUSTEXIST;
120			else
121			open.Flags = OFN_OVERWRITEPROMPT;
122
123	twoaday	77	if (id == CDLG_FILE_OPEN && GetOpenFileName (&open))
124	werner	36	return open.lpstrFile;
125	twoaday	77	else if (id == CDLG_FILE_SAVE && GetSaveFileName (&open))
126	werner	36	return open.lpstrFile;
127
128			return NULL;
129			}
130
131			const char*
132			get_filesave_dlg (HWND hwnd, const char *title,
133			const char filter, const char name)
134			{
135	twoaday	77	return get_filename_dlg (hwnd, CDLG_FILE_SAVE, title, filter, name);
136	werner	36	}
137
138			const char *
139			get_fileopen_dlg (HWND hwnd, const char title, const char filter,
140			const char *name)
141			{
142	twoaday	77	return get_filename_dlg (hwnd, CDLG_FILE_OPEN, title, filter, name);
143	werner	36	}
144
145
146			/* Use the common dialog to allow the user to select a folder.
147			The return value is either the folder path or NULL if cancel was chosen. */
148			const char*
149			get_folder_dlg (HWND hwnd, const char * title, const char * name)
150			{
151			static char folder[MAX_PATH+1] = "";
152			BROWSEINFO bi;
153			ITEMIDLIST * il;
154
155			memset (&bi, 0, sizeof (bi));
156			bi.hwndOwner = hwnd;
157			if (title)
158			bi.lpszTitle = title;
159			if (name && strlen (name) < MAX_PATH-1)
160			strcpy (folder, name);
161			else
162			memset (folder, 0, sizeof (folder));
163			il = SHBrowseForFolder (&bi);
164			if (il) {
165			SHGetPathFromIDList (il, folder);
166			_SHFree (il);
167			return folder;
168			}
169			return NULL;
170			}
171
172
173			/* Return the clipboard contents as a string or NULL
174			if the clipboard does not contain text. */
175			char*
176			get_clip_text (HWND hwnd)
177			{
178			HANDLE clipmem;
179			char cliptxt, p;
180			int len;
181
182			if (OpenClipboard (hwnd) == FALSE)
183			return NULL;
184			clipmem = GetClipboardData (CF_TEXT);
185			if (clipmem == NULL) {
186			p = NULL;
187			goto leave;
188			}
189			cliptxt = (char *) GlobalLock (clipmem);
190			if (cliptxt == NULL) {
191			p = NULL;
192			goto leave;
193			}
194
195			len = strlen (cliptxt);
196			p = new char[len + 1];
197			if (!p)
198			BUG (NULL);
199			memcpy (p, cliptxt, len);
200			p[len] = '\0';
201			GlobalUnlock (clipmem);
202
203			leave:
204			CloseClipboard ();
205			return p;
206			}
207
208
209			/* Set @text as the new clipboard content. */
210			int
211			set_clip_text (HWND hwnd, const char *text, int nbytes)
212			{
213			HANDLE clipmem;
214			int rc = 0;
215			char *p;
216
217			if (OpenClipboard (hwnd) == FALSE)
218			return WPTERR_CLIP_OPEN;
219			EmptyClipboard ();
220
221			clipmem = GlobalAlloc (GHND, nbytes + 1);
222			if (clipmem == NULL)
223			BUG (NULL);
224			p = (char *) GlobalLock (clipmem);
225			if (p == NULL) {
226			rc = WPTERR_GENERAL;;
227			goto leave;
228			}
229			memcpy (p, text, nbytes);
230			p[nbytes] = '\0';
231
232			GlobalUnlock (clipmem);
233			SetClipboardData (CF_TEXT, clipmem);
234
235			leave:
236			CloseClipboard ();
237			return rc;
238			} /* set_clip_text */
239
240
241			/* Append or prepend some text to the clipboard contents.
242			If as_footer = 1, append the text otherwise prepend. */
243			int
244			set_clip_text2 (HWND hwnd, const char *text, int nbytes, int as_footer)
245			{
246			char p, new_text;
247
248			p = get_clip_text (hwnd);
249			if (!p)
250			return WPTERR_CLIP_GET;
251			new_text = new char [strlen (p)+strlen (text)+8];
252			if (!new_text)
253			BUG (0);
254			if (as_footer == 0)
255			sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
256			else
257			sprintf (new_text, "%s\n%s\n\n", p, text);
258			set_clip_text (hwnd, new_text, strlen (new_text)+1);
259			free_if_alloc (p);
260			free_if_alloc (new_text);
261			return 0;
262			}
263
264
265			/* Make a file name out of the path, the file and an extension. */
266			char*
267			make_filename (const char path, const char file, const char *ext)
268			{
269			char *p;
270			size_t size = 0;
271
272			if( path && *path )
273			size += strlen( path );
274			if( file && *file )
275			size += strlen( file );
276			if( ext && *ext )
277			size += strlen( ext );
278			p = new char[size + 4];
279			memset( p, 0, size );
280			if( path ) {
281			strcat( p, path );
282			if( path[strlen( path ) -1] != '\\' )
283			strcat( p, "\\" );
284			}
285			if( file )
286			strcat( p, file );
287			if( ext ) {
288			strcat( p, "." );
289			strcat( p, ext );
290			}
291			return p;
292			} /* make_filename */
293
294
295			/* return 0 if it exists, otherwise >0. */
296			int
297			file_exist_check (const char * fname)
298			{
299			struct stat st;
300			if (stat (fname, &st) == -1)
301			return WPTERR_FILE_EXIST;
302			return 0;
303			}
304
305
306			/* Check if the current folder exists.
307			Return 0 for success. */
308			int
309			dir_exist_check (const char *dir)
310			{
311			struct stat statbuf;
312
313			if( stat( dir, &statbuf ) == -1 )
314			return WPTERR_GENERAL;
315			if( statbuf.st_mode & _S_IFDIR )
316			return 0;
317			return WPTERR_GENERAL;
318			}
319
320
321	twoaday	77	/* Return the file size of the given file @fname. */
322			DWORD
323	werner	36	get_file_size (const char *fname)
324			{
325	twoaday	77	DWORD fsize;
326	werner	36	HANDLE fh;
327
328	twoaday	77	fh = CreateFile (fname, GENERIC_READ, FILE_SHARE_READ,
329			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
330			if (fh == INVALID_HANDLE_VALUE)
331	werner	36	return 0;
332	twoaday	77	fsize = GetFileSize (fh, NULL);
333			if (fsize == 0xFFFFFFFF)
334	werner	36	fsize = 0;
335	twoaday	77	CloseHandle (fh);
336	werner	36	return fsize;
337	twoaday	77	}
338	werner	36
339
340			int
341			init_file_lock( LOCK ctx, const char file )
342			{
343
344			ctx->size = get_file_size( file );
345			ctx->file = m_strdup( file );
346			ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL,
347			OPEN_ALWAYS, 0, NULL );
348			if( ctx->fh == INVALID_HANDLE_VALUE )
349			return WPTERR_GENERAL;
350			if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
351			CloseHandle( ctx->fh );
352			ctx->fh = INVALID_HANDLE_VALUE;
353			ctx->size = 0;
354			free( ctx->file );
355			return WPTERR_GENERAL;
356			}
357			return 0;
358			} /* init_file_lock */
359
360
361			void
362			release_file_lock( LOCK *ctx )
363			{
364			free_if_alloc( ctx->file );
365			ctx->file = NULL;
366			ctx->size = 0;
367			CloseHandle( ctx->fh );
368			} /* release_file_lock */
369
370
371			/* Start a dialog with the exception that before it is checked that the
372			dialog is not already openened. */
373			int
374			dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc,
375			LPARAM param, LPCTSTR title, int title_id )
376			{
377			#ifndef LANG_DE
378			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
379			return -1;
380			#else
381			char strdesc[256];
382			LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
383			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
384			return -1;
385			#endif
386
387			return DialogBoxParam( hinst, name, parent, fnc, param );
388			} /* dialog_box_param */
389
390
391			/* Wrapper for message box which forces the message box into the
392			foreground and it is displayed always on top. */
393			int
394			msg_box (HWND hwnd, const char text, const char title, int mode)
395			{
396			mode \|= MB_SETFOREGROUND;
397			mode \|= MB_TASKMODAL;
398			mode \|= MB_TOPMOST;
399			return MessageBox(hwnd, text, title, mode);
400			}
401
402
403			void
404			set_active_window( HWND dlg)
405			{
406			activ_hwnd = dlg;
407			} /* set_active_window */
408
409			void
410			reset_active_window( void )
411			{
412			activ_hwnd = NULL;
413			} /* reset_active_window */
414
415
416			static DWORD CALLBACK
417			reminder_thread (void *ctx)
418			{
419			reminder_ctx_s c = (reminder_ctx_s )ctx;
420
421			Sleep( c->msecs );
422			SetForegroundWindow( activ_hwnd );
423
424			return 0;
425			} /* reminder_thread */
426
427
428			HANDLE
429			window_reminder( struct reminder_ctx_s *ctx )
430			{
431			DWORD tid = 0;
432
433			return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
434			} /* window_reminder */
435
436
437			char*
438			m_strdup (const char *str)
439			{
440			char * p = new char[strlen (str) + 1];
441			if (p)
442			strcpy (p, str);
443			return p;
444			} /* m_strdup */
445
446
447			/* Center the hwndChild relative to parent.
448			The style param allows to specificy additional styles (like topmost). */
449			void
450			center_window2 (HWND hwndChild, HWND parent, HWND style)
451			{
452			HWND hwndParent;
453			RECT rChild, rParent;
454			HDC hdc;
455			int wChild, hChild, wParent, hParent;
456			int wScreen, hScreen, xNew, yNew;
457			int flags = SWP_NOSIZE \| SWP_NOZORDER;
458
459			hwndParent = parent;
460			if (hwndParent == NULL)
461			hwndParent = GetDesktopWindow ();
462			GetWindowRect (hwndChild, &rChild);
463			wChild = rChild.right - rChild.left;
464			hChild = rChild.bottom - rChild.top;
465
466			GetWindowRect (hwndParent, &rParent);
467			wParent = rParent.right - rParent.left;
468			hParent = rParent.bottom - rParent.top;
469
470			hdc = GetDC (hwndChild);
471			wScreen = GetDeviceCaps (hdc, HORZRES);
472			hScreen = GetDeviceCaps (hdc, VERTRES);
473			ReleaseDC (hwndChild, hdc);
474			xNew = rParent.left + ((wParent - wChild) /2);
475			if (xNew < 0)
476			xNew = 0;
477			else if ((xNew+wChild) > wScreen)
478			xNew = wScreen - wChild;
479			yNew = rParent.top + ((hParent - hChild) /2);
480			if (yNew < 0)
481			yNew = 0;
482			else if ((yNew+hChild) > hScreen)
483			yNew = hScreen - hChild;
484			if (style == HWND_TOPMOST \|\| style == HWND_NOTOPMOST)
485			flags = SWP_NOMOVE \| SWP_NOSIZE;
486			SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
487			}
488
489
490			/* Center the given hwndChild window with no special style. */
491			void
492			center_window (HWND hwndChild, HWND hwndParent)
493			{
494			center_window2 (hwndChild, hwndParent, NULL);
495			}