Work at SourceForge, help us to make it a better place! We have an immediate need for a Support Technician in our San Francisco or Denver office.

Close

[cd1ae9]: xterm-keys.c Maximize Restore History

Download this file

xterm-keys.c    215 lines (192 with data), 5.4 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/* $Id: xterm-keys.c,v 1.5 2009-12-04 22:14:47 tcunha Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <string.h>
#include "tmux.h"
/*
* xterm-style function keys append one of the following values before the last
* character:
*
* 2 Shift
* 3 Alt
* 4 Shift + Alt
* 5 Ctrl
* 6 Shift + Ctrl
* 7 Alt + Ctrl
* 8 Shift + Alt + Ctrl
*
* Rather than parsing them, just match against a table.
*
* There are two forms for F1-F4 (\\033O_P or \\033[1;_P). We accept either but
* always output the latter (it comes first in the table).
*/
int xterm_keys_match(const char *, const char *, size_t);
int xterm_keys_modifiers(const char *, const char *, size_t);
struct xterm_keys_entry {
int key;
const char *template;
};
struct xterm_keys_entry xterm_keys_table[] = {
{ KEYC_F1, "\033[1;_P" },
{ KEYC_F1, "\033O_P" },
{ KEYC_F2, "\033[1;_Q" },
{ KEYC_F2, "\033O_Q" },
{ KEYC_F3, "\033[1;_R" },
{ KEYC_F3, "\033O_R" },
{ KEYC_F4, "\033[1;_S" },
{ KEYC_F4, "\033O_S" },
{ KEYC_F5, "\033[15;_~" },
{ KEYC_F6, "\033[17;_~" },
{ KEYC_F7, "\033[18;_~" },
{ KEYC_F8, "\033[19;_~" },
{ KEYC_F9, "\033[20;_~" },
{ KEYC_F10, "\033[21;_~" },
{ KEYC_F11, "\033[23;_~" },
{ KEYC_F12, "\033[24;_~" },
{ KEYC_F13, "\033[25;_~" },
{ KEYC_F14, "\033[26;_~" },
{ KEYC_F15, "\033[28;_~" },
{ KEYC_F16, "\033[29;_~" },
{ KEYC_F17, "\033[31;_~" },
{ KEYC_F18, "\033[32;_~" },
{ KEYC_F19, "\033[33;_~" },
{ KEYC_F20, "\033[34;_~" },
{ KEYC_UP, "\033[1;_A" },
{ KEYC_DOWN, "\033[1;_B" },
{ KEYC_RIGHT, "\033[1;_C" },
{ KEYC_LEFT, "\033[1;_D" },
{ KEYC_HOME, "\033[1;_H" },
{ KEYC_END, "\033[1;_F" },
{ KEYC_PPAGE, "\033[5;_~" },
{ KEYC_NPAGE, "\033[6;_~" },
{ KEYC_IC, "\033[2;_~" },
{ KEYC_DC, "\033[3;_~" },
};
/*
* Match key against buffer, treating _ as a wildcard. Return -1 for no match,
* 0 for match, 1 if the end of the buffer is reached (need more data).
*/
int
xterm_keys_match(const char *template, const char *buf, size_t len)
{
size_t pos;
if (len == 0)
return (0);
pos = 0;
do {
if (*template != '_' && buf[pos] != *template)
return (-1);
} while (pos++ != len && *++template != '\0');
if (*template != '\0') /* partial */
return (1);
return (0);
}
/* Find modifiers based on template. */
int
xterm_keys_modifiers(const char *template, const char *buf, size_t len)
{
size_t idx;
idx = strcspn(template, "_");
if (idx >= len)
return (0);
switch (buf[idx]) {
case '2':
return (KEYC_SHIFT);
case '3':
return (KEYC_ESCAPE);
case '4':
return (KEYC_SHIFT|KEYC_ESCAPE);
case '5':
return (KEYC_CTRL);
case '6':
return (KEYC_SHIFT|KEYC_CTRL);
case '7':
return (KEYC_ESCAPE|KEYC_CTRL);
case '8':
return (KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
}
return (0);
}
/*
* Lookup key from a buffer against the table. Returns 0 for found (and the
* key), -1 for not found, 1 for partial match.
*/
int
xterm_keys_find(const char *buf, size_t len, size_t *size, int *key)
{
struct xterm_keys_entry *entry;
u_int i;
for (i = 0; i < nitems(xterm_keys_table); i++) {
entry = &xterm_keys_table[i];
switch (xterm_keys_match(entry->template, buf, len)) {
case 0:
*size = strlen(entry->template);
*key = entry->key;
*key |= xterm_keys_modifiers(entry->template, buf, len);
return (0);
case 1:
return (1);
}
}
return (-1);
}
/* Lookup a key number from the table. */
char *
xterm_keys_lookup(int key)
{
struct xterm_keys_entry *entry;
u_int i;
int modifiers;
char *out;
#define KEY_MODIFIERS(key, modifiers) \
(((key) & (KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL)) == (modifiers))
modifiers = 0;
if (KEY_MODIFIERS(key, KEYC_SHIFT))
modifiers = 2;
else if (KEY_MODIFIERS(key, KEYC_ESCAPE))
modifiers = 3;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_ESCAPE))
modifiers = 4;
else if (KEY_MODIFIERS(key, KEYC_CTRL))
modifiers = 5;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_CTRL))
modifiers = 6;
else if (KEY_MODIFIERS(key, KEYC_ESCAPE|KEYC_CTRL))
modifiers = 7;
else if (KEY_MODIFIERS(key, KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL))
modifiers = 8;
#undef KEY_MODIFIERS
/*
* If the key has no modifiers, return NULL and let it fall through to
* the normal lookup.
*/
if (modifiers == 0)
return (NULL);
/* Otherwise, find the key in the table. */
key &= ~(KEYC_SHIFT|KEYC_ESCAPE|KEYC_CTRL);
for (i = 0; i < nitems(xterm_keys_table); i++) {
entry = &xterm_keys_table[i];
if (key == entry->key)
break;
}
if (i == nitems(xterm_keys_table))
return (NULL);
/* Copy the template and replace the modifier. */
out = xstrdup(entry->template);
out[strcspn(out, "_")] = '0' + modifiers;
return (out);
}