Update smithay-clipboard to SCTK 0.9.1 (#16)

This commit entirely reworks the internal structure of the entire crate,
as well as some of its APIs. This crate only accepts a C pointer to a
Wayland display object, since the target audience of this crate are
libraries without a wayland-client types. Also since seat information is
not presented in such clients most of the time, the clipboard entirely
relies on its seat tracking.

src/env.rs

@@ -0,0 +1,80 @@
+use sctk::data_device::{DataDevice, DataDeviceHandler, DataDeviceHandling, DndEvent};
+use sctk::primary_selection::{
+    PrimarySelectionDevice, PrimarySelectionDeviceManager, PrimarySelectionHandler,
+    PrimarySelectionHandling,
+};
+use sctk::reexports::client::protocol::wl_seat::WlSeat;
+use sctk::reexports::client::{Attached, DispatchData};
+use sctk::seat::{SeatData, SeatHandler, SeatHandling, SeatListener};
+
+/// Environemt setup for smithay-clipboard.
+pub struct SmithayClipboard {
+    seats: SeatHandler,
+    primary_selection_manager: PrimarySelectionHandler,
+    data_device_manager: DataDeviceHandler,
+}
+
+impl SmithayClipboard {
+    /// Create new environment.
+    pub fn new() -> Self {
+        let mut seats = SeatHandler::new();
+        let data_device_manager = DataDeviceHandler::init(&mut seats);
+        let primary_selection_manager = PrimarySelectionHandler::init(&mut seats);
+        Self {
+            seats,
+            primary_selection_manager,
+            data_device_manager,
+        }
+    }
+}
+
+// Seat handling for data device manager and primary selection.
+impl SeatHandling for SmithayClipboard {
+    fn listen<F: FnMut(Attached<WlSeat>, &SeatData, DispatchData) + 'static>(
+        &mut self,
+        f: F,
+    ) -> SeatListener {
+        self.seats.listen(f)
+    }
+}
+
+impl PrimarySelectionHandling for SmithayClipboard {
+    fn with_primary_selection<F: FnOnce(&PrimarySelectionDevice)>(
+        &self,
+        seat: &WlSeat,
+        f: F,
+    ) -> Result<(), ()> {
+        self.primary_selection_manager
+            .with_primary_selection(seat, f)
+    }
+
+    fn get_primary_selection_manager(&self) -> Option<PrimarySelectionDeviceManager> {
+        self.primary_selection_manager
+            .get_primary_selection_manager()
+    }
+}
+
+impl DataDeviceHandling for SmithayClipboard {
+    fn set_callback<F>(&mut self, callback: F) -> Result<(), ()>
+    where
+        F: FnMut(WlSeat, DndEvent, DispatchData) + 'static,
+    {
+        self.data_device_manager.set_callback(callback)
+    }
+
+    fn with_device<F: FnOnce(&DataDevice)>(&self, seat: &WlSeat, f: F) -> Result<(), ()> {
+        self.data_device_manager.with_device(seat, f)
+    }
+}
+
+// Setup globals.
+sctk::environment!(SmithayClipboard,
+    singles = [
+    sctk::reexports::protocols::unstable::primary_selection::v1::client::zwp_primary_selection_device_manager_v1::ZwpPrimarySelectionDeviceManagerV1 => primary_selection_manager,
+    sctk::reexports::protocols::misc::gtk_primary_selection::client::gtk_primary_selection_device_manager::GtkPrimarySelectionDeviceManager => primary_selection_manager,
+    sctk::reexports::client::protocol::wl_data_device_manager::WlDataDeviceManager => data_device_manager,
+    ],
+multis = [
+    WlSeat => seats,
+]
+);