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	/* 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	}