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
|
#define pos(x, y) (x) + (y) * window_w
struct Client {
Socket io;
Point cursor;
Point window_start;
Message msg;
Client(const Buffer &b, int fd) : io(fd), cursor(b), window_start(cursor) {}
void parse_message() {
size_t length = io.recv(msg);
while (msg.offset < length) {
switch (msg.decode1()) {
case OP_MOVE1:
move(msg.decode1());
break;
case OP_MOVE2:
move(msg.decode2());
break;
case OP_MOVE4:
move(msg.decode4());
break;
case OP_MOVE8:
move(msg.decode8());
break;
case OP_INSERT:
push(msg.decode1());
break;
case OP_DELETE:
pop();
break;
case OP_SHOW:
int width = msg.decode2();
int height = msg.decode2();
show(width, height);
break;
}
}
#if 1
for (int i = 0; i < length; i++) {
if (msg.data[i])
printf("%02hhx ", msg.data[i]);
else
printf(".. ");
}
printf("\n");
#endif
}
void show(size_t window_w, size_t window_h) {
char *view = new char[window_w * window_h];
int *line_ends = new int[window_h];
for (int i = 0; i < window_h; i++) {
line_ends[i] = window_w;
}
Point window_end(window_start);
for (int i = 0; i < window_h; i++) {
for (int j = 0; j < window_w; j++) {
view[pos(j, i)] = window_end.element();
if (window_end.element() == '\n') {
line_ends[i] = j;
for (int k = j + 1; k < window_w; k++) {
view[pos(k, i)] = 0;
}
j = window_w;
} else if (window_end.element() == '\t') {
for (int k = j + 1; k < j + 8; k++) {
view[pos(k, i)] = 0;
}
j = j + 7;
}
window_end++;
}
}
io.send(view, window_w * window_h);
io.send(line_ends, window_h);
delete[] view;
delete[] line_ends;
}
void move(int64_t target) {
while (target > 0) {
cursor++;
target--;
}
while (target < 0) {
cursor--;
target++;
}
}
void push(int8_t input) {
cursor.push(input);
}
void pop() {
cursor.pop();
}
};
|
