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.
 */

#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	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
17			#ifdef HAVE_CONFIG_H
18			#include <config.h>
19			#endif
20			#include <windows.h>
21			#include <stdio.h>
22			#include <stdarg.h>
23			#include <stdlib.h>
24
25			#include "gpgme.h"
26			#include "GPGOE.h"
27
28
29	twoaday	16	/* Convert the string from the native code page to UTF8. */
30	twoaday	12	char*
31			native_to_utf8 (const char *string)
32			{
33			wchar_t *result;
34			char *native;
35			int n;
36
37			n = MultiByteToWideChar (GetACP (), 0, string, -1, NULL, 0);
38			if (n < 0)
39			return NULL;
40
41			result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
42
43			n = MultiByteToWideChar (GetACP (), 0, string, -1, result, n);
44			if (n < 0) {
45	twoaday	23	xfree (result);
46	twoaday	12	return NULL;
47			}
48
49			n = WideCharToMultiByte (CP_UTF8, 0, result, -1, NULL, 0, NULL, NULL);
50			if (n < 0)
51			return NULL;
52
53			native = (char*)xcalloc (1, n+1);
54
55			n = WideCharToMultiByte (CP_UTF8, 0, result, -1, native, n, NULL, NULL);
56			if (n < 0) {
57	twoaday	23	xfree (result);
58	twoaday	12	return NULL;
59			}
60
61	twoaday	23	xfree (result);
62	twoaday	12	return native;
63			}
64
65
66	twoaday	1	/* Convert the UTF8 string @string into the native charset. */
67			char*
68			utf8_to_native (const char *string)
69			{
70			wchar_t *result;
71			char *native;
72			int n;
73
74			n = MultiByteToWideChar (CP_UTF8, 0, string, -1, NULL, 0);
75			if (n < 0)
76			return NULL;
77	twoaday	10	result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
78	twoaday	1	n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
79			if (n < 0) {
80	twoaday	23	xfree (result);
81	twoaday	1	return NULL;
82			}
83
84			n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
85			if (n < 0)
86			return NULL;
87	twoaday	23	native = (char*)xcalloc (1, n+1);
88	twoaday	1	n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
89			if (n < 0) {
90	twoaday	23	xfree (result);
91	twoaday	1	return NULL;
92			}
93
94	twoaday	23	xfree (result);
95	twoaday	1	return native;
96			}
97
98
99			/* Return the clipboard contents as a string or NULL
100			if the clipboard does not contain text. */
101			char*
102			get_clip_text (HWND hwnd)
103			{
104			HANDLE clipmem;
105			char cliptxt, p;
106			int len;
107
108			if (OpenClipboard (hwnd) == FALSE)
109			return NULL;
110			clipmem = GetClipboardData (CF_TEXT);
111			if (clipmem == NULL) {
112			p = NULL;
113			goto leave;
114			}
115			cliptxt = (char *) GlobalLock (clipmem);
116			if (cliptxt == NULL) {
117			p = NULL;
118			goto leave;
119			}
120
121			len = strlen (cliptxt);
122			p = xcalloc (1, len+1);
123			memcpy (p, cliptxt, len);
124			p[len] = '\0';
125			GlobalUnlock (clipmem);
126
127			leave:
128			CloseClipboard ();
129			return p;
130			}
131
132
133			/* Set @text as the new clipboard content. */
134			int
135			set_clip_text (HWND hwnd, const char *text, int nbytes)
136			{
137			HANDLE clipmem;
138			char *p;
139
140			if (OpenClipboard (hwnd) == FALSE)
141			return -1;
142			EmptyClipboard ();
143
144			clipmem = GlobalAlloc (GHND, nbytes + 1);
145			if (clipmem == NULL)
146			abort ();
147			p = (char *) GlobalLock (clipmem);
148			if (p == NULL) {
149	twoaday	12	CloseClipboard ();
150			GlobalFree (clipmem);
151			return -1;
152	twoaday	1	}
153			memcpy (p, text, nbytes);
154			p[nbytes] = '\0';
155
156	twoaday	12	SetClipboardData (CF_TEXT, clipmem);
157	twoaday	1	GlobalUnlock (clipmem);
158	twoaday	12	CloseClipboard ();
159	twoaday	16	GlobalFree (clipmem);
160	twoaday	1
161			return 0;
162			}
163
164
165			/* Safe wrapper for calloc. */
166			void*
167			xcalloc (size_t n, size_t m)
168			{
169			void *p = calloc (n, m);
170			if (!p)
171			abort ();
172			return p;
173			}
174
175
176			/* Safe wrapper for strdup. */
177			char*
178			xstrdup (const char *s)
179			{
180			char *p = strdup (s);
181			if (!p)
182			abort ();
183			return p;
184			}
185
186
187	twoaday	12	void
188			xfree (void *p)
189			{
190			if (p != NULL)
191			free (p);
192			}
193
194
195	twoaday	1	/* printf style message box. */
196			void
197			show_error (HWND hwnd, const char caption, UINT type, const char fmt, ...)
198			{
199			char buffer[1024];
200			va_list ptr;
201
202			va_start (ptr, fmt);
203	twoaday	23	_vsnprintf (buffer, DIM (buffer)-1, fmt, ptr);
204	twoaday	1	va_end (ptr);
205			MessageBox (hwnd, buffer, caption, type);
206			}
207	twoaday	16
208
209			/* Prepend '> ' to line line in the buffer @inp
210			and store the result in @r_outp. */
211			void
212			quote_msg_text (const char inp, char *r_outp)
213			{
214			size_t i, n=0;
215			char *p;
216			char *outp;
217
218			for (i=0; i < strlen (inp); i++) {
219			if (inp[i] == '\r')
220			n += 4;
221			}
222			outp = xcalloc (1, strlen (inp) + 1 + n + 1);
223			p = strtok ((char *)inp, "\r");
224			while (p != NULL) {
225			if (*p == '\n')
226			p++;
227			strcat (outp, "> ");
228			strcat (outp, p);
229			strcat (outp, "\r\n");
230			p = strtok (NULL, "\r");
231			}
232			*r_outp = outp;
233			}
234
235
236			/* Center the window @hwndChild over the parent window @parent. */
237			void
238			center_window (HWND hwndChild, HWND parent)
239	twoaday	23	{
240	twoaday	16	HWND hwndParent;
241			RECT rChild, rParent;
242			HDC hdc;
243			int wChild, hChild, wParent, hParent;
244			int wScreen, hScreen, xNew, yNew;
245			int flags = SWP_NOSIZE \| SWP_NOZORDER;
246
247			hwndParent = parent;
248			if (hwndParent == NULL)
249			hwndParent = GetDesktopWindow ();
250			GetWindowRect (hwndChild, &rChild);
251			wChild = rChild.right - rChild.left;
252			hChild = rChild.bottom - rChild.top;
253
254			GetWindowRect (hwndParent, &rParent);
255			wParent = rParent.right - rParent.left;
256			hParent = rParent.bottom - rParent.top;
257
258			hdc = GetDC (hwndChild);
259			wScreen = GetDeviceCaps (hdc, HORZRES);
260			hScreen = GetDeviceCaps (hdc, VERTRES);
261			ReleaseDC (hwndChild, hdc);
262			xNew = rParent.left + ((wParent - wChild) /2);
263			if (xNew < 0)
264			xNew = 0;
265			else if ((xNew+wChild) > wScreen)
266			xNew = wScreen - wChild;
267			yNew = rParent.top + ((hParent - hChild) /2);
268			if (yNew < 0)
269			yNew = 0;
270			else if ((yNew+hChild) > hScreen)
271			yNew = hScreen - hChild;
272			SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, flags);
273			}