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
 */

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