safecloset 1.0.0

use {
    super::*,
    crokey::crossterm::event::{KeyEvent, MouseEvent, MouseEventKind},
    minimad::Text,
    termimad::*,
};

#[derive(Debug)]
pub struct Help {
    area: Area,
    scroll: usize,
    text: Text<'static>,
}

impl Default for Help {
    fn default() -> Self {
        Self {
            scroll: 0,
            area: Area::default(),
            text: help_text(),
        }
    }
}

impl Help {
    pub fn set_available_area(&mut self, area: Area) {
        self.area = area;
    }
    pub fn apply_key_event(
        &mut self,
        key: KeyEvent,
    ) -> bool {
        // the only events we're interested into are the ones which impact the
        // scroll position so we create a text view and ask it after the event
        // handling what's the new scroll
        let fmt_text = FmtText::from_text(
            termimad::get_default_skin(),
            self.text.clone(),
            Some((self.area.width - 1) as usize),
        );
        let mut text_view = TextView::from(&self.area, &fmt_text);
        text_view.set_scroll(self.scroll);
        if text_view.apply_key_event(key) {
            self.scroll = text_view.scroll;
            true
        } else {
            false
        }
    }
    /// handle a mouse event
    pub fn on_mouse_event(
        &mut self,
        mouse_event: MouseEvent,
        _double_click: bool,
    ) {
        match mouse_event.kind {
            MouseEventKind::ScrollUp if self.scroll > 0 => {
                self.scroll -= 1;
            }
            MouseEventKind::ScrollDown => {
                self.scroll += 1; // if it overflows, it will be fixed on draw
            }
            _ => {}
        }
    }
    pub fn draw(
        &mut self,
        w: &mut W,
        app_skin: &AppSkin,
    ) -> Result<(), SafeClosetError> {
        let fmt_text = FmtText::from_text(
            &app_skin.help,
            self.text.clone(),
            Some((self.area.width - 1) as usize),
        );
        let mut text_view = TextView::from(&self.area, &fmt_text);
        text_view.set_scroll(self.scroll);
        text_view.write_on(w)?;
        self.scroll = text_view.scroll;
        Ok(())
    }
}