Annotation of src/usr.bin/tmux/xterm-keys.c, Revision 1.20
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:
1.20 ! nicm 53: static const struct xterm_keys_entry xterm_keys_standard[] = {
! 54: { KEYC_HOME, "\033[H" },
! 55: { KEYC_END, "\033[F" },
! 56: };
! 57:
! 58: static const struct xterm_keys_entry xterm_keys_cursor[] = {
! 59: { KEYC_HOME, "\033OH" },
! 60: { KEYC_END, "\033OF" },
! 61: };
! 62:
! 63: static const struct xterm_keys_entry xterm_keys_modified[] = {
1.1 nicm 64: { KEYC_F1, "\033[1;_P" },
1.10 nicm 65: { KEYC_F1, "\033O1;_P" },
1.3 nicm 66: { KEYC_F1, "\033O_P" },
1.1 nicm 67: { KEYC_F2, "\033[1;_Q" },
1.10 nicm 68: { KEYC_F2, "\033O1;_Q" },
1.3 nicm 69: { KEYC_F2, "\033O_Q" },
1.1 nicm 70: { KEYC_F3, "\033[1;_R" },
1.10 nicm 71: { KEYC_F3, "\033O1;_R" },
1.3 nicm 72: { KEYC_F3, "\033O_R" },
1.1 nicm 73: { KEYC_F4, "\033[1;_S" },
1.10 nicm 74: { KEYC_F4, "\033O1;_S" },
1.3 nicm 75: { KEYC_F4, "\033O_S" },
1.1 nicm 76: { KEYC_F5, "\033[15;_~" },
77: { KEYC_F6, "\033[17;_~" },
78: { KEYC_F7, "\033[18;_~" },
79: { KEYC_F8, "\033[19;_~" },
80: { KEYC_F9, "\033[20;_~" },
81: { KEYC_F10, "\033[21;_~" },
82: { KEYC_F11, "\033[23;_~" },
83: { KEYC_F12, "\033[24;_~" },
84: { KEYC_UP, "\033[1;_A" },
85: { KEYC_DOWN, "\033[1;_B" },
86: { KEYC_RIGHT, "\033[1;_C" },
87: { KEYC_LEFT, "\033[1;_D" },
88: { KEYC_HOME, "\033[1;_H" },
89: { KEYC_END, "\033[1;_F" },
90: { KEYC_PPAGE, "\033[5;_~" },
91: { KEYC_NPAGE, "\033[6;_~" },
92: { KEYC_IC, "\033[2;_~" },
93: { KEYC_DC, "\033[3;_~" },
1.11 nicm 94:
95: { '!', "\033[27;_;33~" },
96: { '#', "\033[27;_;35~" },
97: { '(', "\033[27;_;40~" },
98: { ')', "\033[27;_;41~" },
99: { '+', "\033[27;_;43~" },
100: { ',', "\033[27;_;44~" },
101: { '-', "\033[27;_;45~" },
102: { '.', "\033[27;_;46~" },
103: { '0', "\033[27;_;48~" },
104: { '1', "\033[27;_;49~" },
105: { '2', "\033[27;_;50~" },
106: { '3', "\033[27;_;51~" },
107: { '4', "\033[27;_;52~" },
108: { '5', "\033[27;_;53~" },
109: { '6', "\033[27;_;54~" },
110: { '7', "\033[27;_;55~" },
111: { '8', "\033[27;_;56~" },
112: { '9', "\033[27;_;57~" },
113: { ':', "\033[27;_;58~" },
114: { ';', "\033[27;_;59~" },
115: { '<', "\033[27;_;60~" },
116: { '=', "\033[27;_;61~" },
117: { '>', "\033[27;_;62~" },
118: { '?', "\033[27;_;63~" },
119: { '\'', "\033[27;_;39~" },
120: { '\r', "\033[27;_;13~" },
121: { '\t', "\033[27;_;9~" },
1.1 nicm 122: };
123:
1.5 nicm 124: /*
1.4 nicm 125: * Match key against buffer, treating _ as a wildcard. Return -1 for no match,
126: * 0 for match, 1 if the end of the buffer is reached (need more data).
127: */
1.19 nicm 128: static int
1.14 nicm 129: xterm_keys_match(const char *template, const char *buf, size_t len,
1.17 nicm 130: size_t *size, key_code *modifiers)
1.1 nicm 131: {
132: size_t pos;
1.14 nicm 133: int retval;
1.16 nicm 134:
135: *modifiers = 0;
1.1 nicm 136:
1.4 nicm 137: if (len == 0)
1.1 nicm 138: return (0);
139:
140: pos = 0;
141: do {
1.14 nicm 142: if (*template == '_') {
143: retval = xterm_keys_modifiers(buf, len, &pos,
144: modifiers);
145: if (retval != 0)
146: return (retval);
1.13 nicm 147: continue;
1.14 nicm 148: }
1.13 nicm 149: if (buf[pos] != *template)
1.4 nicm 150: return (-1);
1.14 nicm 151: pos++;
152: } while (*++template != '\0' && pos != len);
1.1 nicm 153:
1.4 nicm 154: if (*template != '\0') /* partial */
155: return (1);
156:
1.14 nicm 157: *size = pos;
1.4 nicm 158: return (0);
1.1 nicm 159: }
160:
1.14 nicm 161: /* Find modifiers from buffer. */
1.19 nicm 162: static int
1.17 nicm 163: xterm_keys_modifiers(const char *buf, size_t len, size_t *pos,
164: key_code *modifiers)
1.1 nicm 165: {
1.14 nicm 166: u_int flags;
1.1 nicm 167:
1.14 nicm 168: if (len - *pos < 2)
169: return (1);
1.6 nicm 170:
1.14 nicm 171: if (buf[*pos] < '0' || buf[*pos] > '9')
172: return (-1);
173: flags = buf[(*pos)++] - '0';
174: if (buf[*pos] >= '0' && buf[*pos] <= '9')
175: flags = (flags * 10) + (buf[(*pos)++] - '0');
176: flags -= 1;
177:
178: *modifiers = 0;
179: if (flags & 1)
180: *modifiers |= KEYC_SHIFT;
181: if (flags & 2)
182: *modifiers |= KEYC_ESCAPE;
183: if (flags & 4)
184: *modifiers |= KEYC_CTRL;
185: if (flags & 8)
186: *modifiers |= KEYC_ESCAPE;
187: return (0);
1.1 nicm 188: }
189:
1.4 nicm 190: /*
191: * Lookup key from a buffer against the table. Returns 0 for found (and the
192: * key), -1 for not found, 1 for partial match.
193: */
1.1 nicm 194: int
1.17 nicm 195: xterm_keys_find(const char *buf, size_t len, size_t *size, key_code *key)
1.1 nicm 196: {
1.8 nicm 197: const struct xterm_keys_entry *entry;
1.17 nicm 198: u_int i;
1.14 nicm 199: int matched;
1.17 nicm 200: key_code modifiers;
1.1 nicm 201:
1.20 ! nicm 202: for (i = 0; i < nitems(xterm_keys_modified); i++) {
! 203: entry = &xterm_keys_modified[i];
1.14 nicm 204:
205: matched = xterm_keys_match(entry->template, buf, len, size,
206: &modifiers);
207: if (matched == -1)
208: continue;
209: if (matched == 0)
210: *key = entry->key | modifiers;
211: return (matched);
1.1 nicm 212: }
1.4 nicm 213: return (-1);
1.1 nicm 214: }
215:
216: /* Lookup a key number from the table. */
217: char *
1.20 ! nicm 218: xterm_keys_lookup(key_code key, int mode)
1.1 nicm 219: {
1.20 ! nicm 220: const struct xterm_keys_entry *table, *entry;
! 221: u_int items, i;
1.17 nicm 222: key_code modifiers;
1.8 nicm 223: char *out;
1.1 nicm 224:
1.6 nicm 225: modifiers = 1;
226: if (key & KEYC_SHIFT)
227: modifiers += 1;
228: if (key & KEYC_ESCAPE)
229: modifiers += 2;
230: if (key & KEYC_CTRL)
231: modifiers += 4;
1.1 nicm 232:
233: /*
234: * If the key has no modifiers, return NULL and let it fall through to
235: * the normal lookup.
236: */
1.20 ! nicm 237: if (modifiers != 1) {
! 238: table = xterm_keys_modified;
! 239: items = nitems(xterm_keys_modified);
! 240: } else {
! 241: if (mode & MODE_KCURSOR) {
! 242: table = xterm_keys_cursor;
! 243: items = nitems(xterm_keys_cursor);
! 244: } else {
! 245: table = xterm_keys_standard;
! 246: items = nitems(xterm_keys_standard);
! 247: }
! 248: }
1.1 nicm 249:
250: /* Otherwise, find the key in the table. */
251: key &= ~(KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
1.20 ! nicm 252: for (i = 0; i < items; i++) {
! 253: entry = &table[i];
1.1 nicm 254: if (key == entry->key)
255: break;
256: }
1.20 ! nicm 257: if (i == items)
1.1 nicm 258: return (NULL);
1.5 nicm 259:
1.1 nicm 260: /* Copy the template and replace the modifier. */
261: out = xstrdup(entry->template);
1.20 ! nicm 262: if (modifiers != 1)
! 263: out[strcspn(out, "_")] = '0' + modifiers;
1.1 nicm 264: return (out);
265: }
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