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
|
/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sysexits.h>
#include <wchar.h>
#include <wctype.h>
#include "chat.h"
enum { BufLen = 512 };
static struct {
wchar_t buf[BufLen];
wchar_t *ptr;
wchar_t *end;
wchar_t *tab;
} line = {
.ptr = line.buf,
.end = line.buf,
};
const wchar_t *editHead(void) {
return line.buf;
}
const wchar_t *editTail(void) {
return line.ptr;
}
static void left(void) {
if (line.ptr > line.buf) line.ptr--;
}
static void right(void) {
if (line.ptr < line.end) line.ptr++;
}
static void backWord(void) {
left();
wchar_t *word = wcsnrchr(line.buf, line.ptr - line.buf, L' ');
line.ptr = (word ? &word[1] : line.buf);
}
static void foreWord(void) {
right();
wchar_t *word = wcsnchr(line.ptr, line.end - line.ptr, L' ');
line.ptr = (word ? word : line.end);
}
static void insert(wchar_t ch) {
if (line.end == &line.buf[BufLen - 1]) return;
if (line.ptr != line.end) {
wmemmove(line.ptr + 1, line.ptr, line.end - line.ptr);
}
*line.ptr++ = ch;
line.end++;
}
static void backspace(void) {
if (line.ptr == line.buf) return;
if (line.ptr != line.end) {
wmemmove(line.ptr - 1, line.ptr, line.end - line.ptr);
}
line.ptr--;
line.end--;
}
static void delete(void) {
if (line.ptr == line.end) return;
right();
backspace();
}
static void killBackWord(void) {
wchar_t *from = line.ptr;
backWord();
wmemmove(line.ptr, from, line.end - from);
line.end -= from - line.ptr;
}
static void killForeWord(void) {
wchar_t *from = line.ptr;
foreWord();
wmemmove(from, line.ptr, line.end - line.ptr);
line.end -= line.ptr - from;
line.ptr = from;
}
static char *prefix;
static void complete(struct Tag tag) {
if (!line.tab) {
line.tab = wcsnrchr(line.buf, line.ptr - line.buf, L' ');
line.tab = (line.tab ? &line.tab[1] : line.buf);
prefix = awcsntombs(line.tab, line.ptr - line.tab);
if (!prefix) err(EX_DATAERR, "awcstombs");
}
const char *next = tabNext(tag, prefix);
if (!next) return;
wchar_t *wcs = ambstowcs(next);
if (!wcs) err(EX_DATAERR, "ambstowcs");
size_t i = 0;
for (; wcs[i] && line.ptr > &line.tab[i]; ++i) {
line.tab[i] = wcs[i];
}
while (line.ptr > &line.tab[i]) {
backspace();
}
for (; wcs[i]; ++i) {
insert(wcs[i]);
}
free(wcs);
size_t pos = line.tab - line.buf;
if (!pos && line.tab[0] != L'/') {
insert(L':');
} else if (pos >= 2) {
if (line.buf[pos - 2] == L':') {
line.buf[pos - 2] = L',';
insert(L':');
}
}
insert(L' ');
}
static void accept(void) {
if (!line.tab) return;
line.tab = NULL;
free(prefix);
tabAccept();
}
static void reject(void) {
if (!line.tab) return;
line.tab = NULL;
free(prefix);
tabReject();
}
static void enter(struct Tag tag) {
if (line.end == line.buf) return;
*line.end = L'\0';
char *str = awcstombs(line.buf);
if (!str) err(EX_DATAERR, "awcstombs");
input(tag, str);
free(str);
line.ptr = line.buf;
line.end = line.buf;
}
void edit(struct Tag tag, enum Edit op, wchar_t ch) {
switch (op) {
break; case EditLeft: reject(); left();
break; case EditRight: reject(); right();
break; case EditHome: reject(); line.ptr = line.buf;
break; case EditEnd: reject(); line.ptr = line.end;
break; case EditBackWord: reject(); backWord();
break; case EditForeWord: reject(); foreWord();
break; case EditInsert: accept(); insert(ch);
break; case EditBackspace: reject(); backspace();
break; case EditDelete: reject(); delete();
break; case EditKillBackWord: reject(); killBackWord();
break; case EditKillForeWord: reject(); killForeWord();
break; case EditKillLine: reject(); line.end = line.ptr;
break; case EditComplete: complete(tag);
break; case EditEnter: accept(); enter(tag);
}
*line.end = L'\0';
}
|