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
|
use bufio;
use common::{location};
use fmt;
use io;
use memio;
use sort;
use sort::cmp;
use strings;
use types;
type edit_context = struct {
buffer: []u8,
loc: location,
first_line: size,
last_line: size,
};
fn ndigit(i: size) size = {
let digits = 1z;
for (i > 0; digits += 1) {
i /= 10;
};
return digits;
};
fn edit_getcontext(
ctx: *context,
loc: location,
nlines: int = 3,
) edit_context = {
let first_line = sort::lbisect(ctx.newlines,
size(io::off), &loc.off, &cmp::i64s);
let last_line = first_line;
for (let i = 0; i < nlines && first_line > 0; i += 1) {
first_line -= 1;
};
for (let i = 0; i < nlines && last_line + 1 < len(ctx.newlines); i += 1) {
last_line += 1;
};
if (last_line >= len(ctx.newlines)) {
last_line = len(ctx.newlines) - 1;
};
const min = ctx.newlines[first_line + 1];
const max = ctx.newlines[last_line];
const offs = io::tell(ctx.buffer)!;
defer io::seek(ctx.buffer, offs, io::whence::SET)!;
io::seek(ctx.buffer, 0, io::whence::END)!;
const buffer = memio::buffer(ctx.buffer);
return edit_context {
first_line = first_line + 1,
last_line = last_line + 1,
loc = loc,
buffer = alloc(buffer[min..max]...)!,
};
};
fn edit_context_finish(ectx: *edit_context) void = {
free(ectx.buffer);
};
fn edit_context_show(ctx: *context, ectx: *edit_context) void = {
const buf = memio::fixed(ectx.buffer);
const scan = bufio::newscanner(&buf);
defer bufio::finish(&scan);
const lineno_mods = fmt::mods {
pad = ' ',
width = ndigit(ectx.last_line),
...
};
if (lineno_mods.width == 1) {
lineno_mods.width += 1; // =>
};
fmt::fprintfln(ctx.engine.tty, "{}:{}", ctx.path, ectx.first_line)!;
let lineno = ectx.first_line;
for (let line => bufio::scan_line(&scan)!) {
if (lineno == ectx.loc.line) {
fmt::fprintfln(ctx.engine.tty, "{%} | {}", "=>", &lineno_mods, line)!;
} else {
fmt::fprintfln(ctx.engine.tty, "{%} | {}", lineno, &lineno_mods, line)!;
};
lineno += 1;
};
};
|
