wiki-tui 0.6.0

A simple and easy to use Wikipedia Text User Interface
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use crate::config::Keybindings;
use cursive::direction::Orientation;
use cursive::event::{Event, EventResult, Key};
use cursive::view::{IntoBoxedView, View, ViewWrapper};
use cursive::views::LinearLayout;
use cursive::Vec2;

/// A layout that supports changing keybindings. Works like the normal [`LinearLayout`]
pub struct RootLayout {
    layout: LinearLayout,
    keybindings: Keybindings,
    input_mode: bool,
}

impl RootLayout {
    /// Creates a new RootLayout with a given orientation and some keybindings
    pub fn new(orientation: Orientation, keybindings: Keybindings) -> Self {
        RootLayout {
            layout: LinearLayout::new(orientation),
            keybindings,
            input_mode: false,
        }
    }

    /// A quick way of creating a RootLayout with a horizontal orientation
    pub fn horizontal(keybindings: Keybindings) -> Self {
        RootLayout::new(Orientation::Horizontal, keybindings)
    }

    /// A quick way of creating a RootLayout with an vertical orientation
    pub fn vertical(keybindings: Keybindings) -> Self {
        RootLayout::new(Orientation::Vertical, keybindings)
    }

    /// Sets the input mode of the RootLayout. When input mode is enabled, the following things happen:
    /// - Any character will be send directly to the selected view (keybindings that use characters won't work anymore)
    /// - The Home End Left Right Backspace Delete and Enter keys will also be send directly to the selected view
    pub fn input(mut self, state: bool) -> Self {
        self.input_mode = state;
        self
    }

    /// Adds a view to the layout.
    /// Chainable variant
    pub fn child<V: IntoBoxedView + 'static>(mut self, view: V) -> Self {
        self.add_child(view);
        self
    }

    /// Inserts a view to the layout at a given position
    pub fn insert_child<V: IntoBoxedView + 'static>(&mut self, i: usize, view: V) {
        self.layout.insert_child(i, view);
    }

    /// Adds a view to the layout
    pub fn add_child<V: IntoBoxedView + 'static>(&mut self, view: V) {
        self.layout.add_child(view);
    }
}

impl ViewWrapper for RootLayout {
    wrap_impl!(self.layout: LinearLayout);

    fn wrap_on_event(&mut self, ch: Event) -> EventResult {
        match ch {
            // input mode
            Event::Char(_) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Home) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::End) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Left) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Right) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Backspace) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Del) if self.input_mode => self.layout.on_event(ch),
            Event::Key(Key::Enter) if self.input_mode => self.layout.on_event(ch),

            // movement
            key if key == self.keybindings.up => self.layout.on_event(Event::Key(Key::Up)),
            key if key == self.keybindings.down => self.layout.on_event(Event::Key(Key::Down)),
            key if key == self.keybindings.left => self.layout.on_event(Event::Key(Key::Left)),
            key if key == self.keybindings.right => self.layout.on_event(Event::Key(Key::Right)),

            // focus
            key if key == self.keybindings.focus_next => self.layout.on_event(Event::Key(Key::Tab)),
            key if key == self.keybindings.focus_prev => {
                self.layout.on_event(Event::Shift(Key::Tab))
            }

            _ => self.layout.on_event(ch),
        }
    }

    fn wrap_layout(&mut self, size: Vec2) {
        self.layout.layout(size);
    }
}