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	/* 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	}