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	/* 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	/* Convert the string from the native code page to UTF8. */
30	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	xfree (result);
46	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	xfree (result);
58	return NULL;
59	}
60
61	xfree (result);
62	return native;
63	}
64
65
66	/* 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	result = (wchar_t)xcalloc (1, (n+1) sizeof *result);
78	n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
79	if (n < 0) {
80	xfree (result);
81	return NULL;
82	}
83
84	n = WideCharToMultiByte (GetACP (), 0, result, -1, NULL, 0, NULL, NULL);
85	if (n < 0)
86	return NULL;
87	native = (char*)xcalloc (1, n+1);
88	n = WideCharToMultiByte (GetACP (), 0, result, -1, native, n, NULL, NULL);
89	if (n < 0) {
90	xfree (result);
91	return NULL;
92	}
93
94	xfree (result);
95	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	CloseClipboard ();
150	GlobalFree (clipmem);
151	return -1;
152	}
153	memcpy (p, text, nbytes);
154	p[nbytes] = '\0';
155
156	SetClipboardData (CF_TEXT, clipmem);
157	GlobalUnlock (clipmem);
158	CloseClipboard ();
159	GlobalFree (clipmem);
160
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	void
188	xfree (void *p)
189	{
190	if (p != NULL)
191	free (p);
192	}
193
194
195	/* 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	_vsnprintf (buffer, DIM (buffer)-1, fmt, ptr);
204	va_end (ptr);
205	MessageBox (hwnd, buffer, caption, type);
206	}
207
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	{
240	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	}