wayland-window 0.13.3

A minimalistic window-decorations library built on top of wayland-client.
Documentation 
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use FrameIData;
use wayland_client::Proxy;
use wayland_protocols::unstable::xdg_shell::v6::client::zxdg_surface_v6::{self, ZxdgSurfaceV6};
use wayland_protocols::unstable::xdg_shell::v6::client::zxdg_toplevel_v6::{self, ZxdgToplevelV6};

pub(crate) struct Surface {
    pub toplevel: ZxdgToplevelV6,
    pub surface: ZxdgSurfaceV6,
}

impl Surface {
    pub(crate) fn clone(&self) -> Option<Surface> {
        match (self.toplevel.clone(), self.surface.clone()) {
            (Some(t), Some(s)) => Some(Surface {
                toplevel: t,
                surface: s,
            }),
            _ => None,
        }
    }

    pub(crate) fn destroy(&self) {
        // destroy surfaces in the right order
        self.toplevel.destroy();
        self.surface.destroy();
    }
}

pub(crate) fn xdg_toplevel_implementation<ID>() -> zxdg_toplevel_v6::Implementation<FrameIData<ID>> {
    zxdg_toplevel_v6::Implementation {
        configure: |evqh, idata, _, width, height, states| {
            let mut newsize = if width == 0 || height == 0 {
                // if either w or h is zero, then we get to choose our size
                None
            } else {
                Some(idata.meta.lock().unwrap().clamp_to_limits((width, height)))
            };
            let view: &[u32] =
                unsafe { ::std::slice::from_raw_parts(states.as_ptr() as *const _, states.len() / 4) };
            let states = view.iter()
                .cloned()
                .flat_map(zxdg_toplevel_v6::State::from_raw)
                .collect::<Vec<_>>();
            let activated = states.contains(&zxdg_toplevel_v6::State::Activated);
            let new_maximized = states.contains(&zxdg_toplevel_v6::State::Maximized);
            let configure = super::Configure::Xdg(states);
            {
                let mut meta = idata.meta.lock().unwrap();
                meta.need_redraw = true;
                meta.activated = activated;
                match (new_maximized, meta.maximized) {
                    (false, true) => {
                        // we got de-maximized
                        meta.maximized = false;
                        if newsize.is_none() {
                            newsize = meta.old_size;
                        }
                        meta.old_size = None;
                    }
                    (true, false) => {
                        // we are being maximized
                        meta.maximized = true;
                        meta.old_size = Some(meta.dimensions);
                    }
                    _ => { /* nothing changed */ }
                }
            }
            let mut user_idata = idata.idata.borrow_mut();
            (idata.implementation.configure)(evqh, &mut *user_idata, configure, newsize);
        },
        close: |evqh, idata, _| {
            let mut user_idata = idata.idata.borrow_mut();
            (idata.implementation.close)(evqh, &mut *user_idata);
        },
    }
}

pub(crate) fn xdg_surface_implementation<ID>() -> zxdg_surface_v6::Implementation<FrameIData<ID>> {
    zxdg_surface_v6::Implementation {
        configure: |_, idata, xdg_surface, serial| {
            idata.meta.lock().unwrap().ready = true;
            xdg_surface.ack_configure(serial);
        },
    }
}