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
|
use crate::{keymap, Args};
use anyhow::Error;
use crossterm::{
cursor,
cursor::position,
event::{self, read, Event, EventStream, KeyCode, KeyEvent},
execute, queue,
style::{Color, Print, SetForegroundColor},
terminal::{self, disable_raw_mode, enable_raw_mode},
};
use futures::{future::FutureExt, select, StreamExt};
use helix_core::{state::coords_at_pos, Buffer, State};
use std::io::{self, stdout, Write};
use std::path::PathBuf;
use std::time::Duration;
pub struct BufferComponent<'a> {
x: u16,
y: u16,
contents: Vec<&'a str>,
}
impl BufferComponent<'_> {
pub fn render(&self) {
for (n, line) in self.contents.iter().enumerate() {
execute!(
stdout(),
SetForegroundColor(Color::DarkCyan),
cursor::MoveTo(self.x, self.y + n as u16),
Print((n + 1).to_string())
);
execute!(
stdout(),
SetForegroundColor(Color::Reset),
cursor::MoveTo(self.x + 2, self.y + n as u16),
Print(line)
);
}
}
}
pub struct Editor {
state: Option<State>,
first_line: u16,
size: (u16, u16),
}
impl Editor {
pub fn new(mut args: Args) -> Result<Self, Error> {
let mut editor = Editor {
state: None,
first_line: 0,
size: terminal::size().unwrap(),
};
if let Some(file) = args.files.pop() {
editor.open(file)?;
}
Ok(editor)
}
pub fn open(&mut self, path: PathBuf) -> Result<(), Error> {
let buffer = Buffer::load(path)?;
let state = State::new(buffer);
self.state = Some(state);
Ok(())
}
fn render(&mut self) {
// TODO:
match &self.state {
Some(s) => {
let view = BufferComponent {
x: 0,
y: self.first_line,
contents: s
.file()
.lines_at(self.first_line as usize)
.take(self.size.1 as usize)
.map(|x| x.as_str().unwrap())
.collect::<Vec<&str>>(),
};
view.render();
}
None => (),
}
}
pub async fn print_events(&mut self) {
let mut reader = EventStream::new();
let keymap = keymap::default();
self.render();
loop {
// Handle key events
let mut event = reader.next().await;
match event {
// TODO: handle resize events
Some(Ok(Event::Key(KeyEvent {
code: KeyCode::Char('q'),
..
}))) => {
break;
}
Some(Ok(Event::Key(event))) => {
// TODO: handle modes and sequences (`gg`)
if let Some(command) = keymap.get(&event) {
if let Some(state) = &mut self.state {
// TODO: handle count other than 1
command(state, 1);
self.render();
// render the cursor
let pos = self.state.as_ref().unwrap().selection.primary().head;
let coords = coords_at_pos(
&self.state.as_ref().unwrap().doc.contents.slice(..),
pos,
);
execute!(
stdout(),
cursor::MoveTo((coords.1 + 2) as u16, coords.0 as u16)
);
}
}
}
Some(Ok(_)) => {
// unhandled event
}
Some(Err(x)) => panic!(x),
None => break,
}
}
}
pub fn run(&mut self) -> Result<(), Error> {
enable_raw_mode()?;
let mut stdout = stdout();
execute!(stdout, terminal::EnterAlternateScreen)?;
smol::run(self.print_events());
execute!(stdout, terminal::LeaveAlternateScreen)?;
disable_raw_mode()?;
Ok(())
}
}
|
