trunk/src/OEMisc.c

/* OEMisc.c - OE misc functions
 *       Copyright (C) 2006 Timo Schulz
 *
 * This file is part of GPGOE.
 *
 * GPGOE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 * 
 * GPGOE 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 Lesser General Public License
 * along with GPGOE; 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 <stdarg.h>
#include <stdlib.h>

#include "gpgme.h"
#include "GPGOE.h"


/* Convert the string from the native code page  to UTF8. */
char*
native_to_utf8 (const char *string)
{
    wchar_t *result;
    char *native;
    int n;

    n = MultiByteToWideChar (GetACP (), 0, string, -1, NULL, 0);
    if (n < 0)
        return NULL;

    result = (wchar_t*)xcalloc (1, (n+1) * sizeof *result);

    n = MultiByteToWideChar (GetACP (), 0, string, -1, result, n);
    if (n < 0) {
        free (result);
        return NULL;
    }

    n = WideCharToMultiByte (CP_UTF8, 0, result, -1, NULL, 0, NULL, NULL);
    if (n < 0)
        return NULL;

    native = (char*)xcalloc (1, n+1);

    n = WideCharToMultiByte (CP_UTF8, 0, result, -1, native, n, NULL, NULL);
    if (n < 0) {
        free (result);
        return NULL;
    }

    free (result);
    return native;
}


/* Convert the UTF8 string @string into the native charset. */
char*
utf8_to_native (const char *string)
{
    wchar_t *result;
    char *native;    
    int n;

    n = MultiByteToWideChar (CP_UTF8, 0, string, -1, NULL, 0);
    if (n < 0)
        return NULL;

    result = (wchar_t*)xcalloc (1, (n+1) * sizeof *result);

    n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
    if (n < 0) {
        free (result);
        return NULL;
    }

    n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
    if (n < 0)
        return NULL;

    native = (char*)malloc (n+1);
    if (!native)
        abort ();

    n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
    if (n < 0) {
        free (result);
        return NULL;
    }

    free (result);
    return native;
}


/* 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 = xcalloc (1, len+1);
    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;
    char *p;
    
    if (OpenClipboard (hwnd) == FALSE)  
        return -1;
    EmptyClipboard ();

    clipmem = GlobalAlloc (GHND, nbytes + 1);
    if (clipmem == NULL)
        abort ();
    p = (char *) GlobalLock (clipmem);
    if (p == NULL) {
        CloseClipboard ();
        GlobalFree (clipmem);
        return -1;
    }
    memcpy (p, text, nbytes);
    p[nbytes] = '\0';
    
    SetClipboardData (CF_TEXT, clipmem);
    GlobalUnlock (clipmem);
    CloseClipboard ();
    GlobalFree (clipmem);  
    
    return 0;
}


/* Safe wrapper for calloc. */
void*
xcalloc (size_t n, size_t m)
{
    void *p = calloc (n, m);
    if (!p)
        abort ();
    return p;
}


/* Safe wrapper for strdup. */
char*
xstrdup (const char *s)
{
    char *p = strdup (s);
    if (!p)
        abort ();
    return p;
}


void
xfree (void *p)
{
    if (p != NULL)
        free (p);
}


/* printf style message box. */
void
show_error (HWND hwnd, const char *caption, UINT type, const char *fmt, ...)
{
    char buffer[1024];
    va_list ptr;

    va_start (ptr, fmt);
    _vsnprintf (buffer, sizeof (buffer)-1, fmt, ptr);
    va_end (ptr);
    MessageBox (hwnd, buffer, caption, type);
}


/* Prepend '> ' to line line in the buffer @inp
   and store the result in @r_outp. */
void
quote_msg_text (const char *inp, char **r_outp)
{
    size_t i, n=0;
    char *p;
    char *outp;

    for (i=0; i < strlen (inp); i++) {
        if (inp[i] == '\r')
            n += 4;
    }
    outp = xcalloc (1, strlen (inp) + 1 + n + 1);
    p = strtok ((char *)inp, "\r");
    while (p != NULL) {
        if (*p == '\n')
            p++;
        strcat (outp, "> ");
        strcat (outp, p);
        strcat (outp, "\r\n");
        p = strtok (NULL, "\r");
    }
    *r_outp = outp;
}


/* Center the window @hwndChild over the parent window @parent. */
void
center_window (HWND hwndChild, HWND parent) 
{     
    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;
    SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, flags);
}
1	twoaday	1	/* OEMisc.c - OE misc functions
2			* Copyright (C) 2006 Timo Schulz
3			*
4			* This file is part of GPGOE.
5			*
6			* GPGOE is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU Lesser General Public License as published by
8			* the Free Software Foundation; either version 2.1 of the License, or
9			* (at your option) any later version.
10			*
11			* GPGOE 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 Lesser General Public License
17			* along with GPGOE; 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			#include <windows.h>
25			#include <stdio.h>
26			#include <stdarg.h>
27			#include <stdlib.h>
28
29			#include "gpgme.h"
30			#include "GPGOE.h"
31
32
33	twoaday	16	/* Convert the string from the native code page to UTF8. */
34	twoaday	12	char*
35			native_to_utf8 (const char *string)
36			{
37			wchar_t *result;
38			char *native;
39			int n;
40
41			n = MultiByteToWideChar (GetACP (), 0, string, -1, NULL, 0);
42			if (n < 0)
43			return NULL;
44
45			result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
46
47			n = MultiByteToWideChar (GetACP (), 0, string, -1, result, n);
48			if (n < 0) {
49			free (result);
50			return NULL;
51			}
52
53			n = WideCharToMultiByte (CP_UTF8, 0, result, -1, NULL, 0, NULL, NULL);
54			if (n < 0)
55			return NULL;
56
57			native = (char*)xcalloc (1, n+1);
58
59			n = WideCharToMultiByte (CP_UTF8, 0, result, -1, native, n, NULL, NULL);
60			if (n < 0) {
61			free (result);
62			return NULL;
63			}
64
65			free (result);
66			return native;
67			}
68
69
70	twoaday	1	/* Convert the UTF8 string @string into the native charset. */
71			char*
72			utf8_to_native (const char *string)
73			{
74			wchar_t *result;
75			char *native;
76			int n;
77
78			n = MultiByteToWideChar (CP_UTF8, 0, string, -1, NULL, 0);
79			if (n < 0)
80			return NULL;
81
82	twoaday	10	result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
83	twoaday	1
84			n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
85			if (n < 0) {
86			free (result);
87			return NULL;
88			}
89
90			n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
91			if (n < 0)
92			return NULL;
93
94			native = (char*)malloc (n+1);
95			if (!native)
96			abort ();
97
98			n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
99			if (n < 0) {
100			free (result);
101			return NULL;
102			}
103
104			free (result);
105			return native;
106			}
107
108
109			/* Return the clipboard contents as a string or NULL
110			if the clipboard does not contain text. */
111			char*
112			get_clip_text (HWND hwnd)
113			{
114			HANDLE clipmem;
115			char cliptxt, p;
116			int len;
117
118			if (OpenClipboard (hwnd) == FALSE)
119			return NULL;
120			clipmem = GetClipboardData (CF_TEXT);
121			if (clipmem == NULL) {
122			p = NULL;
123			goto leave;
124			}
125			cliptxt = (char *) GlobalLock (clipmem);
126			if (cliptxt == NULL) {
127			p = NULL;
128			goto leave;
129			}
130
131			len = strlen (cliptxt);
132			p = xcalloc (1, len+1);
133			memcpy (p, cliptxt, len);
134			p[len] = '\0';
135			GlobalUnlock (clipmem);
136
137			leave:
138			CloseClipboard ();
139			return p;
140			}
141
142
143			/* Set @text as the new clipboard content. */
144			int
145			set_clip_text (HWND hwnd, const char *text, int nbytes)
146			{
147			HANDLE clipmem;
148			char *p;
149
150			if (OpenClipboard (hwnd) == FALSE)
151			return -1;
152			EmptyClipboard ();
153
154			clipmem = GlobalAlloc (GHND, nbytes + 1);
155			if (clipmem == NULL)
156			abort ();
157			p = (char *) GlobalLock (clipmem);
158			if (p == NULL) {
159	twoaday	12	CloseClipboard ();
160			GlobalFree (clipmem);
161			return -1;
162	twoaday	1	}
163			memcpy (p, text, nbytes);
164			p[nbytes] = '\0';
165
166	twoaday	12	SetClipboardData (CF_TEXT, clipmem);
167	twoaday	1	GlobalUnlock (clipmem);
168	twoaday	12	CloseClipboard ();
169	twoaday	16	GlobalFree (clipmem);
170	twoaday	1
171			return 0;
172			}
173
174
175			/* Safe wrapper for calloc. */
176			void*
177			xcalloc (size_t n, size_t m)
178			{
179			void *p = calloc (n, m);
180			if (!p)
181			abort ();
182			return p;
183			}
184
185
186			/* Safe wrapper for strdup. */
187			char*
188			xstrdup (const char *s)
189			{
190			char *p = strdup (s);
191			if (!p)
192			abort ();
193			return p;
194			}
195
196
197	twoaday	12	void
198			xfree (void *p)
199			{
200			if (p != NULL)
201			free (p);
202			}
203
204
205	twoaday	1	/* printf style message box. */
206			void
207			show_error (HWND hwnd, const char caption, UINT type, const char fmt, ...)
208			{
209			char buffer[1024];
210			va_list ptr;
211
212			va_start (ptr, fmt);
213			_vsnprintf (buffer, sizeof (buffer)-1, fmt, ptr);
214			va_end (ptr);
215			MessageBox (hwnd, buffer, caption, type);
216			}
217	twoaday	16
218
219			/* Prepend '> ' to line line in the buffer @inp
220			and store the result in @r_outp. */
221			void
222			quote_msg_text (const char inp, char *r_outp)
223			{
224			size_t i, n=0;
225			char *p;
226			char *outp;
227
228			for (i=0; i < strlen (inp); i++) {
229			if (inp[i] == '\r')
230			n += 4;
231			}
232			outp = xcalloc (1, strlen (inp) + 1 + n + 1);
233			p = strtok ((char *)inp, "\r");
234			while (p != NULL) {
235			if (*p == '\n')
236			p++;
237			strcat (outp, "> ");
238			strcat (outp, p);
239			strcat (outp, "\r\n");
240			p = strtok (NULL, "\r");
241			}
242			*r_outp = outp;
243			}
244
245
246			/* Center the window @hwndChild over the parent window @parent. */
247			void
248			center_window (HWND hwndChild, HWND parent)
249			{
250			HWND hwndParent;
251			RECT rChild, rParent;
252			HDC hdc;
253			int wChild, hChild, wParent, hParent;
254			int wScreen, hScreen, xNew, yNew;
255			int flags = SWP_NOSIZE \| SWP_NOZORDER;
256
257			hwndParent = parent;
258			if (hwndParent == NULL)
259			hwndParent = GetDesktopWindow ();
260			GetWindowRect (hwndChild, &rChild);
261			wChild = rChild.right - rChild.left;
262			hChild = rChild.bottom - rChild.top;
263
264			GetWindowRect (hwndParent, &rParent);
265			wParent = rParent.right - rParent.left;
266			hParent = rParent.bottom - rParent.top;
267
268			hdc = GetDC (hwndChild);
269			wScreen = GetDeviceCaps (hdc, HORZRES);
270			hScreen = GetDeviceCaps (hdc, VERTRES);
271			ReleaseDC (hwndChild, hdc);
272			xNew = rParent.left + ((wParent - wChild) /2);
273			if (xNew < 0)
274			xNew = 0;
275			else if ((xNew+wChild) > wScreen)
276			xNew = wScreen - wChild;
277			yNew = rParent.top + ((hParent - hChild) /2);
278			if (yNew < 0)
279			yNew = 0;
280			else if ((yNew+hChild) > hScreen)
281			yNew = hScreen - hChild;
282			SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, flags);
283			}