cranpose 0.1.60

Cranpose runtime and UI facade
Documentation 
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use cranpose_app_shell::PointerSource;
use winit::event::{
    ButtonSource, MouseButton, PointerSource as WinitPointerSource, TabletToolButton,
};

pub(crate) fn pointer_source_from_winit(source: &WinitPointerSource) -> PointerSource {
    match source {
        WinitPointerSource::Mouse => PointerSource::Mouse,
        WinitPointerSource::Touch { .. } => PointerSource::Touch,
        WinitPointerSource::TabletTool { .. } => PointerSource::Stylus,
        _ => PointerSource::Unknown,
    }
}

pub(crate) fn pointer_source_from_button(button: &ButtonSource) -> PointerSource {
    match button {
        ButtonSource::Mouse(_) => PointerSource::Mouse,
        ButtonSource::Touch { .. } => PointerSource::Touch,
        ButtonSource::TabletTool { .. } => PointerSource::Stylus,
        _ => PointerSource::Unknown,
    }
}

fn is_primary_tablet_button(button: TabletToolButton) -> bool {
    button == TabletToolButton::Contact
}

pub(crate) fn is_primary_pointer_button(button: &ButtonSource) -> bool {
    match button {
        ButtonSource::Mouse(button) => *button == MouseButton::Left,
        ButtonSource::Touch { .. } => true,
        ButtonSource::TabletTool { button, .. } => is_primary_tablet_button(*button),
        ButtonSource::Unknown(_) => false,
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn tablet_contact_is_primary_but_barrel_buttons_are_not() {
        assert!(is_primary_tablet_button(TabletToolButton::Contact));
        assert!(!is_primary_tablet_button(TabletToolButton::Barrel));
        assert!(!is_primary_tablet_button(TabletToolButton::Other(7)));
    }

    #[test]
    fn only_the_primary_mouse_button_starts_direct_manipulation() {
        assert!(is_primary_pointer_button(&ButtonSource::Mouse(
            MouseButton::Left
        )));
        assert!(!is_primary_pointer_button(&ButtonSource::Mouse(
            MouseButton::Right
        )));
    }
}