use crate::config::KeyBindingsConfig;
use crate::theme::Theme;
use ratatui::buffer::Buffer;
use ratatui::layout::Rect;
use ratatui::prelude::Widget;
use ratatui::style::Stylize;
use ratatui::text::Line;
use std::cell::Cell;
use tui_popup::Popup;
pub struct HelpWidget {
kb_config: KeyBindingsConfig,
theme: Theme,
scroll: usize,
content_height: Cell<usize>,
}
impl HelpWidget {
pub fn new(kb_config: KeyBindingsConfig, theme: Theme) -> Self {
Self {
kb_config,
theme,
scroll: 0,
content_height: Cell::new(20),
}
}
pub fn scroll_up(&mut self) {
self.scroll = self.scroll.saturating_sub(1);
}
pub fn scroll_down(&mut self) {
let total_lines = self.get_lines().len();
let visible_lines = self.visible_content_height();
if self.scroll + visible_lines < total_lines {
self.scroll += 1;
}
}
pub fn scroll_page_up(&mut self) {
let visible_lines = self.visible_content_height();
self.scroll = self.scroll.saturating_sub(visible_lines);
}
pub fn scroll_page_down(&mut self) {
let total_lines = self.get_lines().len();
let visible_lines = self.visible_content_height();
self.scroll = (self.scroll + visible_lines).min(total_lines.saturating_sub(visible_lines));
}
fn visible_content_height(&self) -> usize {
self.content_height.get()
}
#[rustfmt::skip]
fn get_lines(&self) -> Vec<Line<'_>> {
vec![
Line::from(format!("{:012} - Execute full command", self.kb_config.execute_full.first().unwrap().to_string())),
Line::from(format!("{:012} - Execute until cursor", self.kb_config.execute_until_current.first().unwrap().to_string())),
Line::from(format!("{:012} - Execute before cursor", self.kb_config.execute_until_prev.first().unwrap().to_string())),
Line::from(format!("{:012} - Reset input", self.kb_config.reset_input.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Save output to file", self.kb_config.save_output.first().unwrap().to_string())),
Line::from(format!("{:012} - Save command to file",self.kb_config.save_command.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Search next",self.kb_config.search_next.first().unwrap().to_string())),
Line::from(format!("{:012} - Search previous",self.kb_config.search_prev.first().unwrap().to_string())),
Line::from(format!("{:012} - Toggle regex mode", "alt+x")),
Line::from(format!("{:012} - Toggle case sensitivity", "alt+c")),
Line::from(""),
Line::from(format!("{:012} - Complete forward",self.kb_config.complete.first().unwrap().to_string())),
Line::from(format!("{:012} - Complete backward",self.kb_config.complete_prev.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Go to previous subcommand",self.kb_config.subcommand_prev.first().unwrap().to_string())),
Line::from(format!("{:012} - Go to next subcommand",self.kb_config.subcommand_next.first().unwrap().to_string())),
Line::from(format!("{:012} - Copy current subcommand",self.kb_config.subcommand_copy.first().unwrap().to_string())),
Line::from(format!("{:012} - Cut current subcommand",self.kb_config.subcommand_cut.first().unwrap().to_string())),
Line::from(format!("{:012} - Paste subcommand after",self.kb_config.subcommand_paste.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - History previous item",self.kb_config.history_prev.first().unwrap().to_string())),
Line::from(format!("{:012} - History next item",self.kb_config.history_next.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Scroll up",self.kb_config.scroll_up.first().unwrap().to_string())),
Line::from(format!("{:012} - Scroll down",self.kb_config.scroll_down.first().unwrap().to_string())),
Line::from(format!("{:012} - Scroll page up",self.kb_config.scroll_up_page.first().unwrap().to_string())),
Line::from(format!("{:012} - Scroll page down",self.kb_config.scroll_down_page.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Scroll right",self.kb_config.scroll_right.first().unwrap().to_string())),
Line::from(format!("{:012} - Scroll left",self.kb_config.scroll_left.first().unwrap().to_string())),
Line::from(""),
Line::from(format!("{:012} - Wrap output lines",self.kb_config.toggle_wrap.first().unwrap().to_string())),
]
}
}
impl Widget for &HelpWidget {
fn render(self, area: Rect, buf: &mut Buffer)
where
Self: Sized,
{
let lines = self.get_lines();
let total_lines = lines.len();
let available_height_with_arrows = (area.height as usize).saturating_sub(4);
let available_height_no_arrows = (area.height as usize).saturating_sub(2);
let (content_height, show_arrows) = if total_lines <= available_height_no_arrows {
(total_lines, false)
} else {
(available_height_with_arrows.max(1), true)
};
self.content_height.set(content_height);
let start = self.scroll.min(total_lines.saturating_sub(content_height));
let end = (start + content_height).min(total_lines);
let mut display_lines = Vec::new();
if show_arrows {
if start > 0 {
display_lines.push(Line::from("▲").centered().yellow());
} else {
display_lines.push(Line::from(" "));
}
display_lines.extend(lines[start..end].iter().cloned());
if end < total_lines {
display_lines.push(Line::from("▼").centered().yellow());
} else {
display_lines.push(Line::from(" "));
}
} else {
display_lines.extend(lines[start..end].iter().cloned());
}
Popup::new(ratatui::text::Text::from(display_lines))
.title(" Keys ")
.style(self.theme.popup)
.render(area, buf);
}
}