Annotation of src/usr.bin/tmux/xterm-keys.c, Revision 1.17
1.17 ! nicm 1: /* $OpenBSD: xterm-keys.c,v 1.16 2015/08/30 15:43:40 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
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:
1.17 ! nicm 43: int xterm_keys_match(const char *, const char *, size_t, size_t *,
! 44: key_code *);
! 45: int xterm_keys_modifiers(const char *, size_t, size_t *, key_code *);
1.1 nicm 46:
47: struct xterm_keys_entry {
1.17 ! nicm 48: key_code key;
1.1 nicm 49: const char *template;
50: };
51:
1.8 nicm 52: const struct xterm_keys_entry xterm_keys_table[] = {
1.1 nicm 53: { KEYC_F1, "\033[1;_P" },
1.10 nicm 54: { KEYC_F1, "\033O1;_P" },
1.3 nicm 55: { KEYC_F1, "\033O_P" },
1.1 nicm 56: { KEYC_F2, "\033[1;_Q" },
1.10 nicm 57: { KEYC_F2, "\033O1;_Q" },
1.3 nicm 58: { KEYC_F2, "\033O_Q" },
1.1 nicm 59: { KEYC_F3, "\033[1;_R" },
1.10 nicm 60: { KEYC_F3, "\033O1;_R" },
1.3 nicm 61: { KEYC_F3, "\033O_R" },
1.1 nicm 62: { KEYC_F4, "\033[1;_S" },
1.10 nicm 63: { KEYC_F4, "\033O1;_S" },
1.3 nicm 64: { KEYC_F4, "\033O_S" },
1.1 nicm 65: { KEYC_F5, "\033[15;_~" },
66: { KEYC_F6, "\033[17;_~" },
67: { KEYC_F7, "\033[18;_~" },
68: { KEYC_F8, "\033[19;_~" },
69: { KEYC_F9, "\033[20;_~" },
70: { KEYC_F10, "\033[21;_~" },
71: { KEYC_F11, "\033[23;_~" },
72: { KEYC_F12, "\033[24;_~" },
73: { KEYC_UP, "\033[1;_A" },
74: { KEYC_DOWN, "\033[1;_B" },
75: { KEYC_RIGHT, "\033[1;_C" },
76: { KEYC_LEFT, "\033[1;_D" },
77: { KEYC_HOME, "\033[1;_H" },
78: { KEYC_END, "\033[1;_F" },
79: { KEYC_PPAGE, "\033[5;_~" },
80: { KEYC_NPAGE, "\033[6;_~" },
81: { KEYC_IC, "\033[2;_~" },
82: { KEYC_DC, "\033[3;_~" },
1.11 nicm 83:
84: { '!', "\033[27;_;33~" },
85: { '#', "\033[27;_;35~" },
86: { '(', "\033[27;_;40~" },
87: { ')', "\033[27;_;41~" },
88: { '+', "\033[27;_;43~" },
89: { ',', "\033[27;_;44~" },
90: { '-', "\033[27;_;45~" },
91: { '.', "\033[27;_;46~" },
92: { '0', "\033[27;_;48~" },
93: { '1', "\033[27;_;49~" },
94: { '2', "\033[27;_;50~" },
95: { '3', "\033[27;_;51~" },
96: { '4', "\033[27;_;52~" },
97: { '5', "\033[27;_;53~" },
98: { '6', "\033[27;_;54~" },
99: { '7', "\033[27;_;55~" },
100: { '8', "\033[27;_;56~" },
101: { '9', "\033[27;_;57~" },
102: { ':', "\033[27;_;58~" },
103: { ';', "\033[27;_;59~" },
104: { '<', "\033[27;_;60~" },
105: { '=', "\033[27;_;61~" },
106: { '>', "\033[27;_;62~" },
107: { '?', "\033[27;_;63~" },
108: { '\'', "\033[27;_;39~" },
109: { '\r', "\033[27;_;13~" },
110: { '\t', "\033[27;_;9~" },
1.1 nicm 111: };
112:
1.5 nicm 113: /*
1.4 nicm 114: * Match key against buffer, treating _ as a wildcard. Return -1 for no match,
115: * 0 for match, 1 if the end of the buffer is reached (need more data).
116: */
1.1 nicm 117: int
1.14 nicm 118: xterm_keys_match(const char *template, const char *buf, size_t len,
1.17 ! nicm 119: size_t *size, key_code *modifiers)
1.1 nicm 120: {
121: size_t pos;
1.14 nicm 122: int retval;
1.16 nicm 123:
124: *modifiers = 0;
1.1 nicm 125:
1.4 nicm 126: if (len == 0)
1.1 nicm 127: return (0);
128:
129: pos = 0;
130: do {
1.14 nicm 131: if (*template == '_') {
132: retval = xterm_keys_modifiers(buf, len, &pos,
133: modifiers);
134: if (retval != 0)
135: return (retval);
1.13 nicm 136: continue;
1.14 nicm 137: }
1.13 nicm 138: if (buf[pos] != *template)
1.4 nicm 139: return (-1);
1.14 nicm 140: pos++;
141: } while (*++template != '\0' && pos != len);
1.1 nicm 142:
1.4 nicm 143: if (*template != '\0') /* partial */
144: return (1);
145:
1.14 nicm 146: *size = pos;
1.4 nicm 147: return (0);
1.1 nicm 148: }
149:
1.14 nicm 150: /* Find modifiers from buffer. */
1.1 nicm 151: int
1.17 ! nicm 152: xterm_keys_modifiers(const char *buf, size_t len, size_t *pos,
! 153: key_code *modifiers)
1.1 nicm 154: {
1.14 nicm 155: u_int flags;
1.1 nicm 156:
1.14 nicm 157: if (len - *pos < 2)
158: return (1);
1.6 nicm 159:
1.14 nicm 160: if (buf[*pos] < '0' || buf[*pos] > '9')
161: return (-1);
162: flags = buf[(*pos)++] - '0';
163: if (buf[*pos] >= '0' && buf[*pos] <= '9')
164: flags = (flags * 10) + (buf[(*pos)++] - '0');
165: flags -= 1;
166:
167: *modifiers = 0;
168: if (flags & 1)
169: *modifiers |= KEYC_SHIFT;
170: if (flags & 2)
171: *modifiers |= KEYC_ESCAPE;
172: if (flags & 4)
173: *modifiers |= KEYC_CTRL;
174: if (flags & 8)
175: *modifiers |= KEYC_ESCAPE;
176: return (0);
1.1 nicm 177: }
178:
1.4 nicm 179: /*
180: * Lookup key from a buffer against the table. Returns 0 for found (and the
181: * key), -1 for not found, 1 for partial match.
182: */
1.1 nicm 183: int
1.17 ! nicm 184: xterm_keys_find(const char *buf, size_t len, size_t *size, key_code *key)
1.1 nicm 185: {
1.8 nicm 186: const struct xterm_keys_entry *entry;
1.17 ! nicm 187: u_int i;
1.14 nicm 188: int matched;
1.17 ! nicm 189: key_code modifiers;
1.1 nicm 190:
191: for (i = 0; i < nitems(xterm_keys_table); i++) {
192: entry = &xterm_keys_table[i];
1.14 nicm 193:
194: matched = xterm_keys_match(entry->template, buf, len, size,
195: &modifiers);
196: if (matched == -1)
197: continue;
198: if (matched == 0)
199: *key = entry->key | modifiers;
200: return (matched);
1.1 nicm 201: }
1.4 nicm 202: return (-1);
1.1 nicm 203: }
204:
205: /* Lookup a key number from the table. */
206: char *
1.17 ! nicm 207: xterm_keys_lookup(key_code key)
1.1 nicm 208: {
1.8 nicm 209: const struct xterm_keys_entry *entry;
210: u_int i;
1.17 ! nicm 211: key_code modifiers;
1.8 nicm 212: char *out;
1.1 nicm 213:
1.6 nicm 214: modifiers = 1;
215: if (key & KEYC_SHIFT)
216: modifiers += 1;
217: if (key & KEYC_ESCAPE)
218: modifiers += 2;
219: if (key & KEYC_CTRL)
220: modifiers += 4;
1.1 nicm 221:
222: /*
223: * If the key has no modifiers, return NULL and let it fall through to
224: * the normal lookup.
225: */
1.6 nicm 226: if (modifiers == 1)
1.1 nicm 227: return (NULL);
228:
229: /* Otherwise, find the key in the table. */
230: key &= ~(KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
231: for (i = 0; i < nitems(xterm_keys_table); i++) {
232: entry = &xterm_keys_table[i];
233: if (key == entry->key)
234: break;
235: }
236: if (i == nitems(xterm_keys_table))
237: return (NULL);
1.5 nicm 238:
1.1 nicm 239: /* Copy the template and replace the modifier. */
240: out = xstrdup(entry->template);
241: out[strcspn(out, "_")] = '0' + modifiers;
242: return (out);
243: }
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