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comparison src/dragdrop.c @ 282:c42ec1d1cded r21-0b39

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Import from CVS: tag r21-0b39
author cvs
date Mon, 13 Aug 2007 10:33:18 +0200
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281:090b52736db2 282:c42ec1d1cded
1 /* Drag'n'Drop definitions
2 created 03-may-98 by Oliver Graf <ograf@fga.de>
3 Copyright (C) 1998 Oliver Graf <ograf@fga.de>
4
5 This file is part of XEmacs.
6
7 XEmacs is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 /* Synched up with: Not in FSF. */
23
24 /* This file should be Mule-ized. */
25
26 /* A short introduction to the new Drag'n'Drop Model:
27
28 Currently only drops from OffiX are implemented.
29
30 A drop generates a extended misc-user-event, as defined in events.[ch].
31 This event contains the same as a eval and a button event.
32 The function of a drop is set to 'dragdrop-drop-dispatch' which will be
33 defined in ../lisp/dragdrop.el.
34 The object of the misc-user-event has the following format:
35 ( TYPE . DATA )
36 TYPE is one of 'dragdrop-MIME and 'dragdrop-URL
37 DATA - if TYPE is 'dragdrop-URL, DATA is a list of valid URL strings. It
38 is always a list, also if only one URL string is within it.
39 - if TYPE is 'dragdrop-MIME, DATA is a list of MIME elements.
40 Each can be a string or a list.
41 if it is a string it is the pure MIME data complete with header
42 and body.
43 if it is a list it should look like
44 ( MIME-TYPE MIME-ENCODING MIME-DATA )
45 MIME-TYPE should have the format as required by tm-view, but
46 is a string
47 MIME-ENC the same (a string in this case)
48 MIME-DATA is a string
49 */
50
51 #include <config.h>
52 #include "lisp.h"
53 #include "dragdrop.h"
54
55 /* Drag'n'Drop data types known by XEmacs */
56 Lisp_Object Qdragdrop_MIME;
57 Lisp_Object Qdragdrop_URL;
58
59 /* External defined functions to handle Drag'n'Drop */
60 Lisp_Object Qdragdrop_drop_dispatch;
61
62 /* from wget -- thanxx Hrvoje */
63 /* A list of unsafe characters for encoding, as per RFC1738. '@' and
64 ':' (not listed in RFC) were added because of user/password
65 encoding, and \033 for safe printing. */
66
67 #define URL_UNSAFE " <>\"#%{}|\\^~[]`@:\033"
68
69 /* HEX digit -> ASCII char */
70 #define HEXD2ASC(x) (((x) < 10) ? ((x) + '0') : ((x) - 10 + 'A'))
71
72 /* Encodes the unsafe characters (listed in URL_UNSAFE) in a given
73 string, returning a malloc-ed %XX encoded string.
74 if method is != NULL it is prepended to the string. */
75 char *
76 dnd_url_hexify_string (const char *s, const char *m)
77 {
78 const char *b;
79 char *p, *res;
80 int i;
81
82 b = s;
83 for (i = 0; *s; s++, i++)
84 if (strchr (URL_UNSAFE, *s))
85 i += 2; /* Two more characters (hex digits) */
86 if (m)
87 {
88 res = (char *)xmalloc (i + 1 + strlen (m));
89 strcpy (res, m);
90 p = res + strlen (m);
91 }
92 else
93 {
94 res = (char *)xmalloc (i + 1);
95 p = res;
96 }
97 for (s = b; *s; s++)
98 if (strchr (URL_UNSAFE, *s))
99 {
100 const unsigned char c = *s;
101 *p++ = '%';
102 *p++ = HEXD2ASC (c >> 4);
103 *p++ = HEXD2ASC (c & 0xf);
104 }
105 else
106 *p++ = *s;
107 *p = '\0';
108 return res;
109 }
110
111 void
112 syms_of_dragdrop (void)
113 {
114 defsymbol (&Qdragdrop_MIME, "dragdrop-MIME");
115 defsymbol (&Qdragdrop_URL, "dragdrop-URL");
116 defsymbol (&Qdragdrop_drop_dispatch, "dragdrop-drop-dispatch");
117 }