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use crate::commands;
use crate::{Editor, View};
use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
use std::string::String;
pub struct Prompt {
pub buffer: String,
pub cursor_loc: usize,
completion_fn: Box<dyn FnMut(&str) -> Option<Vec<&str>>>,
callback_fn: Box<dyn FnMut(&mut Editor, &str)>,
}
impl Prompt {
pub fn new(
completion_fn: impl FnMut(&str) -> Option<Vec<&str>> + 'static,
callback_fn: impl FnMut(&mut Editor, &str) + 'static,
) -> Prompt {
Prompt {
buffer: String::from(""),
cursor_loc: 0,
completion_fn: Box::new(completion_fn),
callback_fn: Box::new(callback_fn),
}
}
pub fn insert_char(&mut self, c: char) {
self.buffer.insert(self.cursor_loc, c);
self.cursor_loc += 1;
}
pub fn move_char_left(&mut self) {
if self.cursor_loc > 1 {
self.cursor_loc -= 1;
}
}
pub fn move_char_right(&mut self) {
if self.cursor_loc < self.buffer.len() {
self.cursor_loc += 1;
}
}
pub fn move_start(&mut self) {
self.cursor_loc = 0;
}
pub fn move_end(&mut self) {
self.cursor_loc = self.buffer.len();
}
pub fn delete_char_backwards(&mut self) {
if self.cursor_loc > 0 {
self.buffer.remove(self.cursor_loc - 1);
self.cursor_loc -= 1;
}
}
pub fn handle_input(&mut self, key_event: KeyEvent, editor: &mut Editor) {
match key_event {
KeyEvent {
code: KeyCode::Char(c),
modifiers: KeyModifiers::NONE,
} => self.insert_char(c),
KeyEvent {
code: KeyCode::Esc, ..
} => unimplemented!("Exit prompt!"),
KeyEvent {
code: KeyCode::Right,
..
} => self.move_char_right(),
KeyEvent {
code: KeyCode::Left,
..
} => self.move_char_left(),
KeyEvent {
code: KeyCode::Char('e'),
modifiers: KeyModifiers::CONTROL,
} => self.move_end(),
KeyEvent {
code: KeyCode::Char('a'),
modifiers: KeyModifiers::CONTROL,
} => self.move_start(),
KeyEvent {
code: KeyCode::Backspace,
..
} => self.delete_char_backwards(),
KeyEvent {
code: KeyCode::Enter,
..
} => (self.callback_fn)(editor, &self.buffer),
_ => (),
}
}
}
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