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|
use ratatui::{
crossterm::event::{KeyCode, KeyEvent},
layout::{Alignment, Rect},
style::{Style, Stylize},
text::{ToLine, ToSpan},
widgets::Widget,
};
#[derive(Clone, Default, Debug)]
pub struct StatusBar {
left: String,
left_style: Style,
middle: String,
middle_style: Style,
middle_alignment: Alignment,
right: String,
right_style: Style,
input: Option<String>,
cursor: u16,
}
impl StatusBar {
pub fn new() -> Self {
Self {
left: "".to_string(),
left_style: Style::default(),
middle: " ".to_string(),
middle_style: Style::default(),
middle_alignment: Alignment::Center,
right: "".to_string(),
right_style: Style::default(),
input: None,
cursor: 0,
}
}
pub fn set_left<S>(&mut self, text: S)
where
S: AsRef<str>,
{
self.left = text.as_ref().to_string();
}
pub fn set_middle<S>(&mut self, text: S)
where
S: AsRef<str>,
{
if text.as_ref().is_empty() {
self.middle = " ".to_string();
} else {
self.middle = text.as_ref().to_string();
}
}
pub fn set_right<S>(&mut self, text: S)
where
S: AsRef<str>,
{
self.right = text.as_ref().to_string();
}
pub fn set_left_style(&mut self, style: Style) {
self.left_style = style;
}
pub fn set_middle_style(&mut self, style: Style) {
self.middle_style = style;
}
pub fn set_right_style(&mut self, style: Style) {
self.right_style = style;
}
pub fn set_middle_alignment(&mut self, alignment: Alignment) {
self.middle_alignment = alignment;
}
pub fn set_input_mode(&mut self, input: bool) {
if input {
self.input = Some(String::new());
self.cursor = 0;
} else {
self.input = None;
}
}
pub fn input(&self) -> Option<&str> {
self.input.as_deref()
}
pub fn area(&self, rect: Rect) -> Rect {
let mut inner = rect;
inner.height -= 1;
inner
}
pub fn handle_keyevent(&mut self, event: KeyEvent) {
if let Some(input) = &mut self.input {
match event.code {
KeyCode::Char(c) => {
input.insert(self.cursor as usize, c);
self.cursor += 1;
}
KeyCode::Backspace => {
if self.cursor > 0 {
self.cursor -= 1;
input.remove(self.cursor as usize).to_string();
}
}
KeyCode::Left => {
self.cursor = (self.cursor as i32 - 1).max(0) as u16;
}
KeyCode::Right => {
self.cursor = (self.cursor + 1).min(input.len() as u16);
}
_ => {}
}
}
}
fn layout(&self, mut area: Rect) -> (Rect, Rect, Rect) {
area.y += area.height - 1;
area.height = 1;
let mut left = area;
let mut right = area;
let mut middle = area;
left.width = self.left.len() as u16;
right.width = self.right.len() as u16;
right.x = area.x + area.width - right.width;
middle.x = left.x + left.width;
middle.width = area.width - left.width - right.width;
(left, middle, right)
}
}
impl Widget for &mut StatusBar {
fn render(self, area: Rect, buf: &mut ratatui::prelude::Buffer)
where
Self: Sized,
{
let (left, middle, right) = self.layout(area);
self.left
.to_line()
.left_aligned()
.style(self.left_style)
.render(left, buf);
if let Some(input) = &self.input {
(":".to_owned() + input)
.to_line()
.alignment(Alignment::Left)
.style(self.middle_style)
.render(middle, buf);
input
.chars()
.nth(self.cursor as usize)
.unwrap_or(' ')
.to_span()
.reversed()
.render(
Rect::new(
middle.x + 1 + self.cursor,
middle.y,
middle.width,
middle.height,
),
buf,
);
} else {
self.middle
.to_line()
.alignment(self.middle_alignment)
.style(self.middle_style)
.render(middle, buf);
}
self.right
.to_line()
.right_aligned()
.style(self.right_style)
.render(right, buf);
}
}
|
