| + |
use termion::event::Key;
|
| + |
|
| + |
use tokio::sync::mpsc::UnboundedSender;
|
| + |
|
| + |
use ratatui::layout::{Constraint, Layout};
|
| + |
use ratatui::prelude::{Backend, Rect};
|
| + |
use ratatui::style::Stylize;
|
| + |
use ratatui::text::{Line, Span};
|
| + |
|
| + |
use super::{Render, Widget};
|
| + |
|
| + |
pub struct TextField {
|
| + |
/// Current value of the input box
|
| + |
text: String,
|
| + |
/// Position of cursor in the editor area.
|
| + |
cursor_position: usize,
|
| + |
}
|
| + |
|
| + |
impl TextField {
|
| + |
pub fn text(&self) -> &str {
|
| + |
&self.text
|
| + |
}
|
| + |
|
| + |
pub fn set_text(&mut self, new_text: &str) {
|
| + |
if self.text != new_text {
|
| + |
self.text = String::from(new_text);
|
| + |
self.cursor_position = self.text.len();
|
| + |
}
|
| + |
}
|
| + |
|
| + |
pub fn reset(&mut self) {
|
| + |
self.cursor_position = 0;
|
| + |
self.text.clear();
|
| + |
}
|
| + |
|
| + |
pub fn is_empty(&self) -> bool {
|
| + |
self.text.is_empty()
|
| + |
}
|
| + |
|
| + |
fn move_cursor_left(&mut self) {
|
| + |
let cursor_moved_left = self.cursor_position.saturating_sub(1);
|
| + |
self.cursor_position = self.clamp_cursor(cursor_moved_left);
|
| + |
}
|
| + |
|
| + |
fn move_cursor_right(&mut self) {
|
| + |
let cursor_moved_right = self.cursor_position.saturating_add(1);
|
| + |
self.cursor_position = self.clamp_cursor(cursor_moved_right);
|
| + |
}
|
| + |
|
| + |
fn enter_char(&mut self, new_char: char) {
|
| + |
self.text.insert(self.cursor_position, new_char);
|
| + |
|
| + |
self.move_cursor_right();
|
| + |
}
|
| + |
|
| + |
fn delete_char(&mut self) {
|
| + |
let is_not_cursor_leftmost = self.cursor_position != 0;
|
| + |
if is_not_cursor_leftmost {
|
| + |
// Method "remove" is not used on the saved text for deleting the selected char.
|
| + |
// Reason: Using remove on String works on bytes instead of the chars.
|
| + |
// Using remove would require special care because of char boundaries.
|
| + |
|
| + |
let current_index = self.cursor_position;
|
| + |
let from_left_to_current_index = current_index - 1;
|
| + |
|
| + |
// Getting all characters before the selected character.
|
| + |
let before_char_to_delete = self.text.chars().take(from_left_to_current_index);
|
| + |
// Getting all characters after selected character.
|
| + |
let after_char_to_delete = self.text.chars().skip(current_index);
|
| + |
|
| + |
// Put all characters together except the selected one.
|
| + |
// By leaving the selected one out, it is forgotten and therefore deleted.
|
| + |
self.text = before_char_to_delete.chain(after_char_to_delete).collect();
|
| + |
self.move_cursor_left();
|
| + |
}
|
| + |
}
|
| + |
|
| + |
fn clamp_cursor(&self, new_cursor_pos: usize) -> usize {
|
| + |
new_cursor_pos.clamp(0, self.text.len())
|
| + |
}
|
| + |
}
|
| + |
|
| + |
impl<S, A> Widget<S, A> for TextField {
|
| + |
fn new(_state: &S, _action_tx: UnboundedSender<A>) -> Self {
|
| + |
Self {
|
| + |
//
|
| + |
text: String::new(),
|
| + |
cursor_position: 0,
|
| + |
}
|
| + |
}
|
| + |
|
| + |
fn move_with_state(self, _state: &S) -> Self
|
| + |
where
|
| + |
Self: Sized,
|
| + |
{
|
| + |
Self { ..self }
|
| + |
}
|
| + |
|
| + |
fn name(&self) -> &str {
|
| + |
"Input Box"
|
| + |
}
|
| + |
|
| + |
fn handle_key_event(&mut self, key: Key) {
|
| + |
match key {
|
| + |
Key::Char(to_insert)
|
| + |
if (key != Key::Alt('\n'))
|
| + |
&& (key != Key::Char('\n'))
|
| + |
&& (key != Key::Ctrl('\n')) =>
|
| + |
{
|
| + |
self.enter_char(to_insert);
|
| + |
}
|
| + |
Key::Backspace => {
|
| + |
self.delete_char();
|
| + |
}
|
| + |
Key::Left => {
|
| + |
self.move_cursor_left();
|
| + |
}
|
| + |
Key::Right => {
|
| + |
self.move_cursor_right();
|
| + |
}
|
| + |
_ => {}
|
| + |
}
|
| + |
}
|
| + |
}
|
| + |
|
| + |
pub struct TextFieldProps {
|
| + |
pub titles: (String, String),
|
| + |
pub inline_label: bool,
|
| + |
pub show_cursor: bool,
|
| + |
}
|
| + |
|
| + |
impl Render<TextFieldProps> for TextField {
|
| + |
fn render<B: Backend>(&self, frame: &mut ratatui::Frame, area: Rect, props: TextFieldProps) {
|
| + |
let layout = Layout::vertical(Constraint::from_lengths([1, 1])).split(area);
|
| + |
|
| + |
let input = self.text.as_str();
|
| + |
let label = format!(" {} ", props.titles.0);
|
| + |
let overline = String::from("▔").repeat(area.width as usize);
|
| + |
let cursor_pos = self.cursor_position as u16;
|
| + |
|
| + |
if props.inline_label {
|
| + |
let top_layout = Layout::horizontal([
|
| + |
Constraint::Length(label.chars().count() as u16),
|
| + |
Constraint::Length(1),
|
| + |
Constraint::Min(1),
|
| + |
])
|
| + |
.split(layout[0]);
|
| + |
|
| + |
let label = Span::from(label.clone()).magenta().dim().reversed();
|
| + |
let input = Span::from(input).reset();
|
| + |
|
| + |
let overline = Line::from([Span::raw(overline).magenta().dim()].to_vec());
|
| + |
|
| + |
frame.render_widget(label, top_layout[0]);
|
| + |
frame.render_widget(input, top_layout[2]);
|
| + |
frame.render_widget(overline, layout[1]);
|
| + |
|
| + |
if props.show_cursor {
|
| + |
frame.set_cursor(top_layout[2].x + cursor_pos, top_layout[2].y)
|
| + |
}
|
| + |
} else {
|
| + |
let top = Line::from([Span::from(input).reset()].to_vec());
|
| + |
let bottom = Line::from(
|
| + |
[
|
| + |
Span::from(label).magenta().dim().reversed(),
|
| + |
Span::raw(overline).magenta().dim(),
|
| + |
]
|
| + |
.to_vec(),
|
| + |
);
|
| + |
|
| + |
frame.render_widget(top, layout[0]);
|
| + |
frame.render_widget(bottom, layout[1]);
|
| + |
|
| + |
if props.show_cursor {
|
| + |
frame.set_cursor(area.x + cursor_pos, area.y)
|
| + |
}
|
| + |
}
|
| + |
}
|
| + |
}
|