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 <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 <windows.h>
27			#include <stdio.h>
28			#include <sys/types.h>
29			#include <sys/stat.h>
30			#include <shellapi.h>
31			#include <shlobj.h>
32			#include <commctrl.h>
33
34			#include "wptNLS.h"
35			#include "wptW32API.h"
36			#include "wptErrors.h"
37			#include "wptVersion.h"
38			#include "wptTypes.h"
39
40
41			extern "C" void _SHFree (void *p);
42
43
44			static void
45			set_menu_text_ext (HMENU menu, int by_pos, int m_uid, const char *text)
46			{
47			MENUITEMINFO mii;
48
49			memset (&mii, 0, sizeof mii);
50			mii.cbSize = sizeof mii;
51			mii.fMask = MIIM_TYPE;
52			mii.fType = MFT_STRING;
53			mii.dwTypeData = (char *) text;
54			SetMenuItemInfo (menu, m_uid, by_pos? TRUE : FALSE, &mii);
55			}
56
57
58			/* Set the text of a menu item @m_uid to @text. */
59			void
60			set_menu_text (HMENU menu, int m_uid, const char *text)
61			{
62			set_menu_text_ext (menu, 0, m_uid, text);
63			}
64
65
66			/* Set the text of a menu item with the position @pos to @text. */
67			void
68			set_menu_text_bypos (HMENU menu, int pos, const char *text)
69			{
70			set_menu_text_ext (menu, 1, pos, text);
71			}
72
73
74			/* Set the state of a menu item @m_uid to @state. */
75			void
76			set_menu_state (HMENU menu, int m_uid, int state)
77			{
78			MENUITEMINFO mii;
79
80			memset( &mii, 0, sizeof (mii) );
81			mii.cbSize = sizeof (mii);
82			mii.fMask = MIIM_STATE;
83			mii.fState = state;
84			SetMenuItemInfo (menu, m_uid, FALSE, &mii);
85			}
86
87
88
89			/* Use the common dialog to request a file from the user.
90			id can be either FILE_OPEN or FILE_SAVE.
91			The return value is the file name or NULL if cancel was chosen. */
92			const char *
93			get_filename_dlg (HWND hwnd, int id, const char * title,
94			const char * filter, const char * name)
95			{
96			static char file[512] = "";
97			OPENFILENAME open;
98
99			if (name && strlen (name) < (sizeof (file)-1))
100			strcpy (file, name);
101			else
102			memset (file, 0, sizeof (file));
103			if (!filter)
104			filter = _("All Files (.)\0.\0\0");
105			/* XXX: problem with gettext because of the 'artificial'
106			double string termination!. */
107			memset (&open, 0, sizeof (open));
108			open.lStructSize = sizeof (OPENFILENAME);
109			open.hInstance = glob_hinst;
110			open.lpstrTitle = title;
111			open.lpstrFilter = filter;
112			open.hwndOwner = hwnd;
113			open.lpstrFile = file;
114			open.nMaxFile = sizeof (file) - 1;
115			if (id == FILE_OPEN)
116			open.Flags = OFN_FILEMUSTEXIST\|OFN_PATHMUSTEXIST;
117			else
118			open.Flags = OFN_OVERWRITEPROMPT;
119
120			if (id == FILE_OPEN && GetOpenFileName (&open))
121			return open.lpstrFile;
122			else if (id == FILE_SAVE && GetSaveFileName (&open))
123			return open.lpstrFile;
124
125			return NULL;
126			}
127
128			const char*
129			get_filesave_dlg (HWND hwnd, const char *title,
130			const char filter, const char name)
131			{
132			return get_filename_dlg (hwnd, FILE_SAVE, title, filter, name);
133			}
134
135			const char *
136			get_fileopen_dlg (HWND hwnd, const char title, const char filter,
137			const char *name)
138			{
139			return get_filename_dlg (hwnd, FILE_OPEN, title, filter, name);
140			}
141
142
143			/* Use the common dialog to allow the user to select a folder.
144			The return value is either the folder path or NULL if cancel was chosen. */
145			const char*
146			get_folder_dlg (HWND hwnd, const char * title, const char * name)
147			{
148			static char folder[MAX_PATH+1] = "";
149			BROWSEINFO bi;
150			ITEMIDLIST * il;
151
152			memset (&bi, 0, sizeof (bi));
153			bi.hwndOwner = hwnd;
154			if (title)
155			bi.lpszTitle = title;
156			if (name && strlen (name) < MAX_PATH-1)
157			strcpy (folder, name);
158			else
159			memset (folder, 0, sizeof (folder));
160			il = SHBrowseForFolder (&bi);
161			if (il) {
162			SHGetPathFromIDList (il, folder);
163			_SHFree (il);
164			return folder;
165			}
166			return NULL;
167			}
168
169
170			/* Return the clipboard contents as a string or NULL
171			if the clipboard does not contain text. */
172			char*
173			get_clip_text (HWND hwnd)
174			{
175			HANDLE clipmem;
176			char cliptxt, p;
177			int len;
178
179			if (OpenClipboard (hwnd) == FALSE)
180			return NULL;
181			clipmem = GetClipboardData (CF_TEXT);
182			if (clipmem == NULL) {
183			p = NULL;
184			goto leave;
185			}
186			cliptxt = (char *) GlobalLock (clipmem);
187			if (cliptxt == NULL) {
188			p = NULL;
189			goto leave;
190			}
191
192			len = strlen (cliptxt);
193			p = new char[len + 1];
194			if (!p)
195			BUG (NULL);
196			memcpy (p, cliptxt, len);
197			p[len] = '\0';
198			GlobalUnlock (clipmem);
199
200			leave:
201			CloseClipboard ();
202			return p;
203			}
204
205
206			/* Set @text as the new clipboard content. */
207			int
208			set_clip_text (HWND hwnd, const char *text, int nbytes)
209			{
210			HANDLE clipmem;
211			int rc = 0;
212			char *p;
213
214			if (OpenClipboard (hwnd) == FALSE)
215			return WPTERR_CLIP_OPEN;
216			EmptyClipboard ();
217
218			clipmem = GlobalAlloc (GHND, nbytes + 1);
219			if (clipmem == NULL)
220			BUG (NULL);
221			p = (char *) GlobalLock (clipmem);
222			if (p == NULL) {
223			rc = WPTERR_GENERAL;;
224			goto leave;
225			}
226			memcpy (p, text, nbytes);
227			p[nbytes] = '\0';
228
229			GlobalUnlock (clipmem);
230			SetClipboardData (CF_TEXT, clipmem);
231
232			leave:
233			CloseClipboard ();
234			return rc;
235			} /* set_clip_text */
236
237
238			/* Append or prepend some text to the clipboard contents.
239			If as_footer = 1, append the text otherwise prepend. */
240			int
241			set_clip_text2 (HWND hwnd, const char *text, int nbytes, int as_footer)
242			{
243			char p, new_text;
244
245			p = get_clip_text (hwnd);
246			if (!p)
247			return WPTERR_CLIP_GET;
248			new_text = new char [strlen (p)+strlen (text)+8];
249			if (!new_text)
250			BUG (0);
251			if (as_footer == 0)
252			sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
253			else
254			sprintf (new_text, "%s\n%s\n\n", p, text);
255			set_clip_text (hwnd, new_text, strlen (new_text)+1);
256			free_if_alloc (p);
257			free_if_alloc (new_text);
258			return 0;
259			}
260
261
262			/* Make a file name out of the path, the file and an extension. */
263			char*
264			make_filename (const char path, const char file, const char *ext)
265			{
266			char *p;
267			size_t size = 0;
268
269			if( path && *path )
270			size += strlen( path );
271			if( file && *file )
272			size += strlen( file );
273			if( ext && *ext )
274			size += strlen( ext );
275			p = new char[size + 4];
276			memset( p, 0, size );
277			if( path ) {
278			strcat( p, path );
279			if( path[strlen( path ) -1] != '\\' )
280			strcat( p, "\\" );
281			}
282			if( file )
283			strcat( p, file );
284			if( ext ) {
285			strcat( p, "." );
286			strcat( p, ext );
287			}
288			return p;
289			} /* make_filename */
290
291
292			/* return 0 if it exists, otherwise >0. */
293			int
294			file_exist_check (const char * fname)
295			{
296			struct stat st;
297			if (stat (fname, &st) == -1)
298			return WPTERR_FILE_EXIST;
299			return 0;
300			}
301
302
303			/* Check if the current folder exists.
304			Return 0 for success. */
305			int
306			dir_exist_check (const char *dir)
307			{
308			struct stat statbuf;
309
310			if( stat( dir, &statbuf ) == -1 )
311			return WPTERR_GENERAL;
312			if( statbuf.st_mode & _S_IFDIR )
313			return 0;
314			return WPTERR_GENERAL;
315			}
316
317
318			/* Return the file size of the given file. */
319			size_t
320			get_file_size (const char *fname)
321			{
322			size_t fsize;
323			HANDLE fh;
324
325			fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
326			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
327			if( fh == INVALID_HANDLE_VALUE )
328			return 0;
329			fsize = GetFileSize( fh, NULL );
330			if( fsize == 0xFFFFFFFF )
331			fsize = 0;
332			CloseHandle( fh );
333			return fsize;
334			} /* get_file_size */
335
336
337			int
338			init_file_lock( LOCK ctx, const char file )
339			{
340
341			ctx->size = get_file_size( file );
342			ctx->file = m_strdup( file );
343			ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL,
344			OPEN_ALWAYS, 0, NULL );
345			if( ctx->fh == INVALID_HANDLE_VALUE )
346			return WPTERR_GENERAL;
347			if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
348			CloseHandle( ctx->fh );
349			ctx->fh = INVALID_HANDLE_VALUE;
350			ctx->size = 0;
351			free( ctx->file );
352			return WPTERR_GENERAL;
353			}
354			return 0;
355			} /* init_file_lock */
356
357
358			void
359			release_file_lock( LOCK *ctx )
360			{
361			free_if_alloc( ctx->file );
362			ctx->file = NULL;
363			ctx->size = 0;
364			CloseHandle( ctx->fh );
365			} /* release_file_lock */
366
367
368			/* Start a dialog with the exception that before it is checked that the
369			dialog is not already openened. */
370			int
371			dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc,
372			LPARAM param, LPCTSTR title, int title_id )
373			{
374			#ifndef LANG_DE
375			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
376			return -1;
377			#else
378			char strdesc[256];
379			LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
380			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
381			return -1;
382			#endif
383
384			return DialogBoxParam( hinst, name, parent, fnc, param );
385			} /* dialog_box_param */
386
387
388			/* Wrapper for message box which forces the message box into the
389			foreground and it is displayed always on top. */
390			int
391			msg_box (HWND hwnd, const char text, const char title, int mode)
392			{
393			mode \|= MB_SETFOREGROUND;
394			mode \|= MB_TASKMODAL;
395			mode \|= MB_TOPMOST;
396			return MessageBox(hwnd, text, title, mode);
397			}
398
399
400			void
401			set_active_window( HWND dlg)
402			{
403			activ_hwnd = dlg;
404			} /* set_active_window */
405
406			void
407			reset_active_window( void )
408			{
409			activ_hwnd = NULL;
410			} /* reset_active_window */
411
412
413			static DWORD CALLBACK
414			reminder_thread (void *ctx)
415			{
416			reminder_ctx_s c = (reminder_ctx_s )ctx;
417
418			Sleep( c->msecs );
419			SetForegroundWindow( activ_hwnd );
420
421			return 0;
422			} /* reminder_thread */
423
424
425			HANDLE
426			window_reminder( struct reminder_ctx_s *ctx )
427			{
428			DWORD tid = 0;
429
430			return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
431			} /* window_reminder */
432
433
434			char*
435			m_strdup (const char *str)
436			{
437			char * p = new char[strlen (str) + 1];
438			if (p)
439			strcpy (p, str);
440			return p;
441			} /* m_strdup */
442
443
444			/* Center the hwndChild relative to parent.
445			The style param allows to specificy additional styles (like topmost). */
446			void
447			center_window2 (HWND hwndChild, HWND parent, HWND style)
448			{
449			HWND hwndParent;
450			RECT rChild, rParent;
451			HDC hdc;
452			int wChild, hChild, wParent, hParent;
453			int wScreen, hScreen, xNew, yNew;
454			int flags = SWP_NOSIZE \| SWP_NOZORDER;
455
456			hwndParent = parent;
457			if (hwndParent == NULL)
458			hwndParent = GetDesktopWindow ();
459			GetWindowRect (hwndChild, &rChild);
460			wChild = rChild.right - rChild.left;
461			hChild = rChild.bottom - rChild.top;
462
463			GetWindowRect (hwndParent, &rParent);
464			wParent = rParent.right - rParent.left;
465			hParent = rParent.bottom - rParent.top;
466
467			hdc = GetDC (hwndChild);
468			wScreen = GetDeviceCaps (hdc, HORZRES);
469			hScreen = GetDeviceCaps (hdc, VERTRES);
470			ReleaseDC (hwndChild, hdc);
471			xNew = rParent.left + ((wParent - wChild) /2);
472			if (xNew < 0)
473			xNew = 0;
474			else if ((xNew+wChild) > wScreen)
475			xNew = wScreen - wChild;
476			yNew = rParent.top + ((hParent - hChild) /2);
477			if (yNew < 0)
478			yNew = 0;
479			else if ((yNew+hChild) > hScreen)
480			yNew = hScreen - hChild;
481			if (style == HWND_TOPMOST \|\| style == HWND_NOTOPMOST)
482			flags = SWP_NOMOVE \| SWP_NOSIZE;
483			SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
484			}
485
486
487			/* Center the given hwndChild window with no special style. */
488			void
489			center_window (HWND hwndChild, HWND hwndParent)
490			{
491			center_window2 (hwndChild, hwndParent, NULL);
492			}