wayland: implement xdg-toplevel-drag

src/ifs/xdg_toplevel_drag_manager_v1.rs

@@ -0,0 +1,117 @@
+use {
+    crate::{
+        client::{Client, ClientError},
+        globals::{Global, GlobalName},
+        ifs::xdg_toplevel_drag_v1::XdgToplevelDragV1,
+        leaks::Tracker,
+        object::Object,
+        utils::buffd::{MsgParser, MsgParserError},
+        wire::{xdg_toplevel_drag_manager_v1::*, XdgToplevelDragManagerV1Id},
+    },
+    std::rc::Rc,
+    thiserror::Error,
+};
+
+pub struct XdgToplevelDragManagerV1Global {
+    pub name: GlobalName,
+}
+
+impl XdgToplevelDragManagerV1Global {
+    pub fn new(name: GlobalName) -> Self {
+        Self { name }
+    }
+
+    fn bind_(
+        self: Rc<Self>,
+        id: XdgToplevelDragManagerV1Id,
+        client: &Rc<Client>,
+        version: u32,
+    ) -> Result<(), XdgToplevelDragManagerV1Error> {
+        let mgr = Rc::new(XdgToplevelDragManagerV1 {
+            id,
+            client: client.clone(),
+            tracker: Default::default(),
+            version,
+        });
+        track!(client, mgr);
+        client.add_client_obj(&mgr)?;
+        Ok(())
+    }
+}
+
+global_base!(
+    XdgToplevelDragManagerV1Global,
+    XdgToplevelDragManagerV1,
+    XdgToplevelDragManagerV1Error
+);
+
+simple_add_global!(XdgToplevelDragManagerV1Global);
+
+impl Global for XdgToplevelDragManagerV1Global {
+    fn singleton(&self) -> bool {
+        true
+    }
+
+    fn version(&self) -> u32 {
+        1
+    }
+}
+
+pub struct XdgToplevelDragManagerV1 {
+    pub id: XdgToplevelDragManagerV1Id,
+    pub client: Rc<Client>,
+    pub tracker: Tracker<Self>,
+    pub version: u32,
+}
+
+impl XdgToplevelDragManagerV1 {
+    fn destroy(&self, parser: MsgParser<'_, '_>) -> Result<(), XdgToplevelDragManagerV1Error> {
+        let _req: Destroy = self.client.parse(self, parser)?;
+        self.client.remove_obj(self)?;
+        Ok(())
+    }
+
+    fn get_xdg_toplevel_drag(
+        &self,
+        parser: MsgParser<'_, '_>,
+    ) -> Result<(), XdgToplevelDragManagerV1Error> {
+        let req: GetXdgToplevelDrag = self.client.parse(self, parser)?;
+        let source = self.client.lookup(req.data_source)?;
+        if source.data.was_used() {
+            return Err(XdgToplevelDragManagerV1Error::AlreadyUsed);
+        }
+        if source.toplevel_drag.get().is_some() {
+            return Err(XdgToplevelDragManagerV1Error::HasDrag);
+        }
+        let drag = Rc::new(XdgToplevelDragV1::new(req.id, &source));
+        track!(&self.client, drag);
+        self.client.add_client_obj(&drag)?;
+        source.toplevel_drag.set(Some(drag));
+        Ok(())
+    }
+}
+
+object_base! {
+    self = XdgToplevelDragManagerV1;
+
+    DESTROY => destroy,
+    GET_XDG_TOPLEVEL_DRAG => get_xdg_toplevel_drag,
+}
+
+impl Object for XdgToplevelDragManagerV1 {}
+
+simple_add_obj!(XdgToplevelDragManagerV1);
+
+#[derive(Debug, Error)]
+pub enum XdgToplevelDragManagerV1Error {
+    #[error(transparent)]
+    ClientError(Box<ClientError>),
+    #[error("Parsing failed")]
+    MsgParserError(#[source] Box<MsgParserError>),
+    #[error("The data source has already been used")]
+    AlreadyUsed,
+    #[error("The source already has a drag object")]
+    HasDrag,
+}
+efrom!(XdgToplevelDragManagerV1Error, ClientError);
+efrom!(XdgToplevelDragManagerV1Error, MsgParserError);