Trait PromptMode

Source

pub trait PromptMode<U: Ui>:
    Clone
    + Send
    + 'static {
    type ExitWidget: Widget<U> = File<U>;

    // Required methods
    fn update(&mut self, pa: &mut Pass, text: Text, area: &U::Area) -> Text;
    fn prompt(&self) -> Text;

    // Provided methods
    fn on_switch(&mut self, pa: &mut Pass, text: Text, area: &U::Area) -> Text { ... }
    fn before_exit(&mut self, pa: &mut Pass, text: Text, area: &U::Area) { ... }
    fn once() { ... }
    fn return_handle(&self) -> Option<Handle<Self::ExitWidget, U>> { ... }
}

Expand description

A mode to control the Prompt, by acting on its Text and U::Area

Through the Pass, one can act on the entirety of Duat’s shared state:

use duat_core::prelude::*;
use duat_utils::modes::PromptMode;

#[derive(Default, Clone)]
struct RealTimeSwitch {
    initial: Option<String>,
    current: Option<String>,
    name_was_correct: bool,
};

impl<U: Ui> PromptMode<U> for RealTimeSwitch {
    fn update(&mut self, pa: &mut Pass, text: Text, area: &U::Area) -> Text {
        let name = text.to_string();

        self.name_was_correct = if name != *self.current.as_ref().unwrap() {
            if cmd::buffer(pa, &name).is_ok() {
                self.current = Some(name);
                true
            } else {
                false
            }
        } else {
            true
        };

        text
    }

    fn on_switch(&mut self, pa: &mut Pass, text: Text, area: &U::Area) -> Text {
        self.initial = Some(context::fixed_file::<U>(pa).unwrap().read(pa).name());
        self.current = self.initial.clone();

        text
    }

    fn before_exit(&mut self, pa: &mut Pass, text: Text, area: &U::Area) {
        if !self.name_was_correct {
            cmd::buffer(pa, self.initial.take().unwrap());
        }
    }

    fn prompt(&self) -> Text {
        txt!("[prompt]switch to").build()
    }
}