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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
#define _POSIX_SOURCE
#include <locale.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include "editor.h"
#include "vis.h"
#include "util.h"
#ifdef PDCURSES
int ESCDELAY;
#endif
#ifndef NCURSES_REENTRANT
# define set_escdelay(d) (ESCDELAY = (d))
#endif
static void cursor(const Arg *arg);
static void call(const Arg *arg);
static void insert(const Arg *arg);
static void line(const Arg *arg);
static void find_forward(const Arg *arg);
static void find_backward(const Arg *arg);
static Mode *mode;
static Editor *editor;
#include "config.h"
static Config *config = &editors[0];
static void cursor(const Arg *arg) {
arg->m(editor);
}
static void call(const Arg *arg) {
arg->f(editor);
}
static void line(const Arg *arg) {
editor_line_goto(editor, arg->i);
}
static void find_forward(const Arg *arg) {
editor_search(editor, arg->s, 1);
}
static void find_backward(const Arg *arg) {
editor_search(editor, arg->s, -1);
}
static void insert(const Arg *arg) {
editor_insert(editor, arg->s, strlen(arg->s));
}
typedef struct Screen Screen;
static struct Screen {
int w, h;
bool need_resize;
} screen = { .need_resize = true };
static void sigwinch_handler(int sig) {
screen.need_resize = true;
}
static void resize_screen(Screen *screen) {
struct winsize ws;
if (ioctl(0, TIOCGWINSZ, &ws) == -1) {
getmaxyx(stdscr, screen->h, screen->w);
} else {
screen->w = ws.ws_col;
screen->h = ws.ws_row;
}
resizeterm(screen->h, screen->w);
wresize(stdscr, screen->h, screen->w);
screen->need_resize = false;
}
static void setup() {
setlocale(LC_CTYPE, "");
if (!getenv("ESCDELAY"))
set_escdelay(50);
initscr();
start_color();
raw();
noecho();
keypad(stdscr, TRUE);
meta(stdscr, TRUE);
resize_screen(&screen);
/* needed because we use getch() which implicitly calls refresh() which
would clear the screen (overwrite it with an empty / unused stdscr */
refresh();
struct sigaction sa;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = sigwinch_handler;
sigaction(SIGWINCH, &sa, NULL);
}
static void cleanup() {
editor_free(editor);
endwin();
}
static bool keymatch(Key *key0, Key *key1) {
return (key0->str[0] && memcmp(key0->str, key1->str, sizeof(key1->str)) == 0) ||
(key0->code && key0->code == key1->code);
}
static KeyBinding *keybinding(Mode *mode, Key *key0, Key *key1) {
for (; mode; mode = mode->parent) {
for (KeyBinding *kb = mode->bindings; kb && (kb->key[0].code || kb->key[0].str[0]); kb++) {
if (keymatch(key0, &kb->key[0]) && (!key1 || keymatch(key1, &kb->key[1])))
return kb;
}
if (mode->unknown && !mode->unknown(key0, key1))
break;
}
return NULL;
}
int main(int argc, char *argv[]) {
/* decide which key configuration to use based on argv[0] */
char *arg0 = argv[0];
while (*arg0 && (*arg0 == '.' || *arg0 == '/'))
arg0++;
for (int i = 0; i < LENGTH(editors); i++) {
if (editors[i].name[0] == arg0[0]) {
config = &editors[i];
break;
}
}
mode = config->mode;
setup();
if (!(editor = editor_new(screen.w, screen.h, statusbar)))
return 1;
if (!editor_syntax_load(editor, syntaxes, colors))
return 1;
char *filename = argc > 1 ? argv[1] : NULL;
if (!editor_load(editor, filename))
return 1;
struct timeval idle = { .tv_usec = 0 }, *timeout = NULL;
Key key, key_prev, *key_mod = NULL;
for (;;) {
if (screen.need_resize) {
resize_screen(&screen);
editor_resize(editor, screen.w, screen.h);
}
fd_set fds;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
editor_update(editor);
doupdate();
idle.tv_sec = 3;
int r = select(1, &fds, NULL, NULL, timeout);
if (r == -1 && errno == EINTR)
continue;
if (r < 0) {
perror("select()");
exit(EXIT_FAILURE);
}
if (!FD_ISSET(STDIN_FILENO, &fds)) {
editor_snapshot(editor);
timeout = NULL;
continue;
}
int keycode = getch();
if (keycode == ERR)
continue;
// TODO verbatim insert mode
int len = 0;
if (keycode >= KEY_MIN) {
key.code = keycode;
key.str[0] = '\0';
} else {
char keychar = keycode;
key.str[len++] = keychar;
key.code = 0;
if (!ISASCII(keychar) || keychar == '\e') {
nodelay(stdscr, TRUE);
for (int t; len < LENGTH(key.str) && (t = getch()) != ERR; len++)
key.str[len] = t;
nodelay(stdscr, FALSE);
}
}
for (size_t i = len; i < LENGTH(key.str); i++)
key.str[i] = '\0';
KeyBinding *action = keybinding(mode, key_mod ? key_mod : &key, key_mod ? &key : NULL);
if (!action && key_mod) {
/* second char of a combination was invalid, search again without the prefix */
action = keybinding(mode, &key, NULL);
key_mod = NULL;
}
if (action) {
/* check if it is the first part of a combination */
if (!key_mod && (action->key[1].code || action->key[1].str[0])) {
key_prev = key;
key_mod = &key_prev;
continue;
}
action->func(&action->arg);
key_mod = NULL;
continue;
}
if (keycode >= KEY_MIN)
continue;
if (mode->input && mode->input(key.str, len))
timeout = &idle;
}
cleanup();
return 0;
}
|
