Annotation of src/usr.bin/tmux/xterm-keys.c, Revision 1.21
1.20 nicm 1: /* $OpenBSD: xterm-keys.c,v 1.19 2016/10/03 22:52:11 nicm Exp $ */
1.1 nicm 2:
3: /*
1.18 nicm 4: * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <string.h>
22:
23: #include "tmux.h"
24:
25: /*
26: * xterm-style function keys append one of the following values before the last
27: * character:
28: *
29: * 2 Shift
1.5 nicm 30: * 3 Alt
31: * 4 Shift + Alt
32: * 5 Ctrl
33: * 6 Shift + Ctrl
34: * 7 Alt + Ctrl
1.1 nicm 35: * 8 Shift + Alt + Ctrl
36: *
37: * Rather than parsing them, just match against a table.
38: *
1.10 nicm 39: * There are three forms for F1-F4 (\\033O_P and \\033O1;_P and \\033[1;_P).
40: * We accept any but always output the latter (it comes first in the table).
1.1 nicm 41: */
42:
1.19 nicm 43: static int xterm_keys_match(const char *, const char *, size_t, size_t *,
44: key_code *);
45: static int xterm_keys_modifiers(const char *, size_t, size_t *,
46: key_code *);
1.1 nicm 47:
48: struct xterm_keys_entry {
1.17 nicm 49: key_code key;
1.1 nicm 50: const char *template;
51: };
52:
1.21 ! nicm 53: static const struct xterm_keys_entry xterm_keys_table[] = {
1.1 nicm 54: { KEYC_F1, "\033[1;_P" },
1.10 nicm 55: { KEYC_F1, "\033O1;_P" },
1.3 nicm 56: { KEYC_F1, "\033O_P" },
1.1 nicm 57: { KEYC_F2, "\033[1;_Q" },
1.10 nicm 58: { KEYC_F2, "\033O1;_Q" },
1.3 nicm 59: { KEYC_F2, "\033O_Q" },
1.1 nicm 60: { KEYC_F3, "\033[1;_R" },
1.10 nicm 61: { KEYC_F3, "\033O1;_R" },
1.3 nicm 62: { KEYC_F3, "\033O_R" },
1.1 nicm 63: { KEYC_F4, "\033[1;_S" },
1.10 nicm 64: { KEYC_F4, "\033O1;_S" },
1.3 nicm 65: { KEYC_F4, "\033O_S" },
1.1 nicm 66: { KEYC_F5, "\033[15;_~" },
67: { KEYC_F6, "\033[17;_~" },
68: { KEYC_F7, "\033[18;_~" },
69: { KEYC_F8, "\033[19;_~" },
70: { KEYC_F9, "\033[20;_~" },
71: { KEYC_F10, "\033[21;_~" },
72: { KEYC_F11, "\033[23;_~" },
73: { KEYC_F12, "\033[24;_~" },
74: { KEYC_UP, "\033[1;_A" },
75: { KEYC_DOWN, "\033[1;_B" },
76: { KEYC_RIGHT, "\033[1;_C" },
77: { KEYC_LEFT, "\033[1;_D" },
78: { KEYC_HOME, "\033[1;_H" },
79: { KEYC_END, "\033[1;_F" },
80: { KEYC_PPAGE, "\033[5;_~" },
81: { KEYC_NPAGE, "\033[6;_~" },
82: { KEYC_IC, "\033[2;_~" },
83: { KEYC_DC, "\033[3;_~" },
1.11 nicm 84:
85: { '!', "\033[27;_;33~" },
86: { '#', "\033[27;_;35~" },
87: { '(', "\033[27;_;40~" },
88: { ')', "\033[27;_;41~" },
89: { '+', "\033[27;_;43~" },
90: { ',', "\033[27;_;44~" },
91: { '-', "\033[27;_;45~" },
92: { '.', "\033[27;_;46~" },
93: { '0', "\033[27;_;48~" },
94: { '1', "\033[27;_;49~" },
95: { '2', "\033[27;_;50~" },
96: { '3', "\033[27;_;51~" },
97: { '4', "\033[27;_;52~" },
98: { '5', "\033[27;_;53~" },
99: { '6', "\033[27;_;54~" },
100: { '7', "\033[27;_;55~" },
101: { '8', "\033[27;_;56~" },
102: { '9', "\033[27;_;57~" },
103: { ':', "\033[27;_;58~" },
104: { ';', "\033[27;_;59~" },
105: { '<', "\033[27;_;60~" },
106: { '=', "\033[27;_;61~" },
107: { '>', "\033[27;_;62~" },
108: { '?', "\033[27;_;63~" },
109: { '\'', "\033[27;_;39~" },
110: { '\r', "\033[27;_;13~" },
111: { '\t', "\033[27;_;9~" },
1.1 nicm 112: };
113:
1.5 nicm 114: /*
1.4 nicm 115: * Match key against buffer, treating _ as a wildcard. Return -1 for no match,
116: * 0 for match, 1 if the end of the buffer is reached (need more data).
117: */
1.19 nicm 118: static int
1.14 nicm 119: xterm_keys_match(const char *template, const char *buf, size_t len,
1.17 nicm 120: size_t *size, key_code *modifiers)
1.1 nicm 121: {
122: size_t pos;
1.14 nicm 123: int retval;
1.16 nicm 124:
125: *modifiers = 0;
1.1 nicm 126:
1.4 nicm 127: if (len == 0)
1.1 nicm 128: return (0);
129:
130: pos = 0;
131: do {
1.14 nicm 132: if (*template == '_') {
133: retval = xterm_keys_modifiers(buf, len, &pos,
134: modifiers);
135: if (retval != 0)
136: return (retval);
1.13 nicm 137: continue;
1.14 nicm 138: }
1.13 nicm 139: if (buf[pos] != *template)
1.4 nicm 140: return (-1);
1.14 nicm 141: pos++;
142: } while (*++template != '\0' && pos != len);
1.1 nicm 143:
1.4 nicm 144: if (*template != '\0') /* partial */
145: return (1);
146:
1.14 nicm 147: *size = pos;
1.4 nicm 148: return (0);
1.1 nicm 149: }
150:
1.14 nicm 151: /* Find modifiers from buffer. */
1.19 nicm 152: static int
1.17 nicm 153: xterm_keys_modifiers(const char *buf, size_t len, size_t *pos,
154: key_code *modifiers)
1.1 nicm 155: {
1.14 nicm 156: u_int flags;
1.1 nicm 157:
1.14 nicm 158: if (len - *pos < 2)
159: return (1);
1.6 nicm 160:
1.14 nicm 161: if (buf[*pos] < '0' || buf[*pos] > '9')
162: return (-1);
163: flags = buf[(*pos)++] - '0';
164: if (buf[*pos] >= '0' && buf[*pos] <= '9')
165: flags = (flags * 10) + (buf[(*pos)++] - '0');
166: flags -= 1;
167:
168: *modifiers = 0;
169: if (flags & 1)
170: *modifiers |= KEYC_SHIFT;
171: if (flags & 2)
172: *modifiers |= KEYC_ESCAPE;
173: if (flags & 4)
174: *modifiers |= KEYC_CTRL;
175: if (flags & 8)
176: *modifiers |= KEYC_ESCAPE;
177: return (0);
1.1 nicm 178: }
179:
1.4 nicm 180: /*
181: * Lookup key from a buffer against the table. Returns 0 for found (and the
182: * key), -1 for not found, 1 for partial match.
183: */
1.1 nicm 184: int
1.17 nicm 185: xterm_keys_find(const char *buf, size_t len, size_t *size, key_code *key)
1.1 nicm 186: {
1.8 nicm 187: const struct xterm_keys_entry *entry;
1.17 nicm 188: u_int i;
1.14 nicm 189: int matched;
1.17 nicm 190: key_code modifiers;
1.1 nicm 191:
1.21 ! nicm 192: for (i = 0; i < nitems(xterm_keys_table); i++) {
! 193: entry = &xterm_keys_table[i];
1.14 nicm 194:
195: matched = xterm_keys_match(entry->template, buf, len, size,
196: &modifiers);
197: if (matched == -1)
198: continue;
199: if (matched == 0)
200: *key = entry->key | modifiers;
201: return (matched);
1.1 nicm 202: }
1.4 nicm 203: return (-1);
1.1 nicm 204: }
205:
206: /* Lookup a key number from the table. */
207: char *
1.21 ! nicm 208: xterm_keys_lookup(key_code key)
1.1 nicm 209: {
1.21 ! nicm 210: const struct xterm_keys_entry *entry;
! 211: u_int i;
1.17 nicm 212: key_code modifiers;
1.8 nicm 213: char *out;
1.1 nicm 214:
1.6 nicm 215: modifiers = 1;
216: if (key & KEYC_SHIFT)
217: modifiers += 1;
218: if (key & KEYC_ESCAPE)
219: modifiers += 2;
220: if (key & KEYC_CTRL)
221: modifiers += 4;
1.1 nicm 222:
223: /*
224: * If the key has no modifiers, return NULL and let it fall through to
225: * the normal lookup.
226: */
1.21 ! nicm 227: if (modifiers == 1)
! 228: return (NULL);
1.1 nicm 229:
230: /* Otherwise, find the key in the table. */
231: key &= ~(KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
1.21 ! nicm 232: for (i = 0; i < nitems(xterm_keys_table); i++) {
! 233: entry = &xterm_keys_table[i];
1.1 nicm 234: if (key == entry->key)
235: break;
236: }
1.21 ! nicm 237: if (i == nitems(xterm_keys_table))
1.1 nicm 238: return (NULL);
1.5 nicm 239:
1.1 nicm 240: /* Copy the template and replace the modifier. */
241: out = xstrdup(entry->template);
1.21 ! nicm 242: out[strcspn(out, "_")] = '0' + modifiers;
1.1 nicm 243: return (out);
244: }
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