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
use std::fmt;
/// The editor's rendering and interaction mode.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum Mode {
/// Read-only preview. No cursor shown, no raw Markdown visible.
/// Files open in this mode.
#[default]
Preview,
/// Hybrid rendered/raw editing. Cursor visible; the active line (or active
/// table cell) is shown as raw Markdown while the rest is rendered.
/// Entered on click or first keystroke (not scroll).
Rendered,
/// Entire document shown as plain Markdown text. Standard text editing.
Raw,
/// Inline diff review. The buffer is replaced by a stacked diff
/// of the pre-change rope vs. the on-disk content; the user
/// accepts / rejects each hunk before the merged result becomes
/// the new buffer. Invariant: `state.mode == Mode::Diff ⟺
/// state.diff.is_some()`, maintained by
/// [`super::EditorState::enter_diff_mode`] /
/// [`super::EditorState::exit_diff_mode`].
Diff,
}
impl fmt::Display for Mode {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Mode::Preview => f.write_str("PREVIEW"),
Mode::Rendered => f.write_str("EDIT"),
Mode::Raw => f.write_str("RAW"),
Mode::Diff => f.write_str("DIFF"),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn mode_display() {
assert_eq!(Mode::Preview.to_string(), "PREVIEW");
assert_eq!(Mode::Rendered.to_string(), "EDIT");
assert_eq!(Mode::Raw.to_string(), "RAW");
}
#[test]
fn mode_default_is_preview() {
assert_eq!(Mode::default(), Mode::Preview);
}
}