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) {
        xfree (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) {
        xfree (result);
        return NULL;
    }

    xfree (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) {
        xfree (result);
        return NULL;
    }

    n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
    if (n < 0)
        return NULL;
    native = (char*)xcalloc (1, n+1);
    n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
    if (n < 0) {
        xfree (result);
        return NULL;
    }

    xfree (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, DIM (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	/* 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	/* Convert the string from the native code page to UTF8. */
34	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	xfree (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	xfree (result);
62	return NULL;
63	}
64
65	xfree (result);
66	return native;
67	}
68
69
70	/* 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	result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
82	n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
83	if (n < 0) {
84	xfree (result);
85	return NULL;
86	}
87
88	n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
89	if (n < 0)
90	return NULL;
91	native = (char*)xcalloc (1, n+1);
92	n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
93	if (n < 0) {
94	xfree (result);
95	return NULL;
96	}
97
98	xfree (result);
99	return native;
100	}
101
102
103	/* Return the clipboard contents as a string or NULL
104	if the clipboard does not contain text. */
105	char*
106	get_clip_text (HWND hwnd)
107	{
108	HANDLE clipmem;
109	char cliptxt, p;
110	int len;
111
112	if (OpenClipboard (hwnd) == FALSE)
113	return NULL;
114	clipmem = GetClipboardData (CF_TEXT);
115	if (clipmem == NULL) {
116	p = NULL;
117	goto leave;
118	}
119	cliptxt = (char *) GlobalLock (clipmem);
120	if (cliptxt == NULL) {
121	p = NULL;
122	goto leave;
123	}
124
125	len = strlen (cliptxt);
126	p = xcalloc (1, len+1);
127	memcpy (p, cliptxt, len);
128	p[len] = '\0';
129	GlobalUnlock (clipmem);
130
131	leave:
132	CloseClipboard ();
133	return p;
134	}
135
136
137	/* Set @text as the new clipboard content. */
138	int
139	set_clip_text (HWND hwnd, const char *text, int nbytes)
140	{
141	HANDLE clipmem;
142	char *p;
143
144	if (OpenClipboard (hwnd) == FALSE)
145	return -1;
146	EmptyClipboard ();
147
148	clipmem = GlobalAlloc (GHND, nbytes + 1);
149	if (clipmem == NULL)
150	abort ();
151	p = (char *) GlobalLock (clipmem);
152	if (p == NULL) {
153	CloseClipboard ();
154	GlobalFree (clipmem);
155	return -1;
156	}
157	memcpy (p, text, nbytes);
158	p[nbytes] = '\0';
159
160	SetClipboardData (CF_TEXT, clipmem);
161	GlobalUnlock (clipmem);
162	CloseClipboard ();
163	GlobalFree (clipmem);
164
165	return 0;
166	}
167
168
169	/* Safe wrapper for calloc. */
170	void*
171	xcalloc (size_t n, size_t m)
172	{
173	void *p = calloc (n, m);
174	if (!p)
175	abort ();
176	return p;
177	}
178
179
180	/* Safe wrapper for strdup. */
181	char*
182	xstrdup (const char *s)
183	{
184	char *p = strdup (s);
185	if (!p)
186	abort ();
187	return p;
188	}
189
190
191	void
192	xfree (void *p)
193	{
194	if (p != NULL)
195	free (p);
196	}
197
198
199	/* printf style message box. */
200	void
201	show_error (HWND hwnd, const char caption, UINT type, const char fmt, ...)
202	{
203	char buffer[1024];
204	va_list ptr;
205
206	va_start (ptr, fmt);
207	_vsnprintf (buffer, DIM (buffer)-1, fmt, ptr);
208	va_end (ptr);
209	MessageBox (hwnd, buffer, caption, type);
210	}
211
212
213	/* Prepend '> ' to line line in the buffer @inp
214	and store the result in @r_outp. */
215	void
216	quote_msg_text (const char inp, char *r_outp)
217	{
218	size_t i, n=0;
219	char *p;
220	char *outp;
221
222	for (i=0; i < strlen (inp); i++) {
223	if (inp[i] == '\r')
224	n += 4;
225	}
226	outp = xcalloc (1, strlen (inp) + 1 + n + 1);
227	p = strtok ((char *)inp, "\r");
228	while (p != NULL) {
229	if (*p == '\n')
230	p++;
231	strcat (outp, "> ");
232	strcat (outp, p);
233	strcat (outp, "\r\n");
234	p = strtok (NULL, "\r");
235	}
236	*r_outp = outp;
237	}
238
239
240	/* Center the window @hwndChild over the parent window @parent. */
241	void
242	center_window (HWND hwndChild, HWND parent)
243	{
244	HWND hwndParent;
245	RECT rChild, rParent;
246	HDC hdc;
247	int wChild, hChild, wParent, hParent;
248	int wScreen, hScreen, xNew, yNew;
249	int flags = SWP_NOSIZE \| SWP_NOZORDER;
250
251	hwndParent = parent;
252	if (hwndParent == NULL)
253	hwndParent = GetDesktopWindow ();
254	GetWindowRect (hwndChild, &rChild);
255	wChild = rChild.right - rChild.left;
256	hChild = rChild.bottom - rChild.top;
257
258	GetWindowRect (hwndParent, &rParent);
259	wParent = rParent.right - rParent.left;
260	hParent = rParent.bottom - rParent.top;
261
262	hdc = GetDC (hwndChild);
263	wScreen = GetDeviceCaps (hdc, HORZRES);
264	hScreen = GetDeviceCaps (hdc, VERTRES);
265	ReleaseDC (hwndChild, hdc);
266	xNew = rParent.left + ((wParent - wChild) /2);
267	if (xNew < 0)
268	xNew = 0;
269	else if ((xNew+wChild) > wScreen)
270	xNew = wScreen - wChild;
271	yNew = rParent.top + ((hParent - hChild) /2);
272	if (yNew < 0)
273	yNew = 0;
274	else if ((yNew+hChild) > hScreen)
275	yNew = hScreen - hChild;
276	SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, flags);
277	}