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
|
#![allow(clippy::redundant_field_names)]
#![allow(dead_code)]
extern crate ropey;
use std::fs::File;
use std::io;
use ropey::iter::{Bytes, Chars, Chunks, Lines};
use ropey::{Rope, RopeSlice};
struct TextBuffer {
text: Rope,
path: String,
dirty: bool,
}
impl TextBuffer {
fn from_path(path: &str) -> io::Result<TextBuffer> {
let text = Rope::from_reader(&mut io::BufReader::new(File::open(&path)?))?;
Ok(TextBuffer {
text: text,
path: path.to_string(),
dirty: false,
})
}
fn get_line(&self, idx: usize) -> RopeSlice {
self.text.line(idx)
}
fn bytes(&self) -> Bytes {
self.text.bytes()
}
fn chars(&self) -> Chars {
self.text.chars()
}
fn lines(&self) -> Lines {
self.text.lines()
}
fn chunks(&self) -> Chunks {
self.text.chunks()
}
fn edit(&mut self, start: usize, end: usize, text: &str) {
if start != end {
self.text.remove(start..end);
}
if !text.is_empty() {
self.text.insert(start, text);
}
self.dirty = true;
}
}
fn main() {
// Get filepath from commandline
let filepath = if std::env::args().count() > 1 {
std::env::args().nth(1).unwrap()
} else {
println!(
"You must pass a filepath! Only recieved {} arguments.",
std::env::args().count()
);
panic!()
};
let mut buf = TextBuffer::from_path(&filepath).unwrap();
buf.edit(3, 5, "Hello!");
println!("{}", buf.get_line(2));
}
|
