editor-core 0.4.1

A headless editor engine focused on state management, Unicode-aware text measurement, and coordinate conversion.
Documentation 
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

use editor_core::{Command, CommandExecutor, CursorCommand, EditCommand};

fn main() {
    let mut executor = CommandExecutor::new("a\nb\nc", 80);

    // Duplicate the current line.
    executor
        .execute(Command::Cursor(CursorCommand::MoveTo {
            line: 1,
            column: 0,
        }))
        .unwrap();
    executor
        .execute(Command::Edit(EditCommand::DuplicateLines))
        .unwrap();
    assert_eq!(executor.editor().get_text(), "a\nb\nb\nc");

    // Move the duplicated line back up.
    executor
        .execute(Command::Edit(EditCommand::MoveLinesUp))
        .unwrap();
    assert_eq!(executor.editor().get_text(), "b\na\nb\nc");

    // Join the first two lines ("b" + "a") into one line.
    executor
        .execute(Command::Cursor(CursorCommand::MoveTo {
            line: 0,
            column: 0,
        }))
        .unwrap();
    executor
        .execute(Command::Edit(EditCommand::JoinLines))
        .unwrap();
    assert_eq!(executor.editor().get_text(), "b a\nb\nc");
}