helix-view/src/info.rs · helix

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1use crate::input::KeyEvent;

2use helix_core::unicode::width::UnicodeWidthStr;

3use std::fmt::Write;

5#[derive(Debug)]

6/// Info box used in editor. Rendering logic will be in other crate.

7pub struct Info {

8 /// Title shown at top.

9 pub title: String,

10 /// Text body, should contain newlines.

11 pub text: String,

12 /// Body width.

13 pub width: u16,

14 /// Body height.

15 pub height: u16,

18impl Info {

19 pub fn new(title: &str, body: Vec<(&str, Vec<KeyEvent>)>) -> Info {

20 let body = body

21 .into_iter()

22 .map(|(desc, events)| {

23 let events = events.iter().map(ToString::to_string).collect::<Vec<_>>();

24 (desc, events.join(", "))

25 })

26 .collect::<Vec<_>>();

28 let keymaps_width = body.iter().map(|r| r.1.len()).max().unwrap();

29 let mut text = String::new();

31 for (desc, keyevents) in &body {

32 let _ = writeln!(

33 text,

34 "{:width$} {}",

35 keyevents,

36 desc,

37 width = keymaps_width

38 );

39 }

41 Info {

42 title: title.to_string(),

43 width: text.lines().map(|l| l.width()).max().unwrap() as u16,

44 height: body.len() as u16,

45 text,

46 }

47 }