wayland: add a generic wayland client

src/wl_usr/usr_ifs/usr_wl_pointer.rs

@@ -0,0 +1,164 @@
+use {
+    crate::{
+        ifs::wl_seat::wl_pointer::PendingScroll,
+        utils::{
+            buffd::{MsgParser, MsgParserError},
+            clonecell::CloneCell,
+        },
+        wire::{wl_pointer::*, WlPointerId},
+        wl_usr::{usr_ifs::usr_wl_surface::UsrWlSurface, usr_object::UsrObject, UsrCon},
+    },
+    std::{cell::Cell, rc::Rc},
+};
+
+pub struct UsrWlPointer {
+    pub id: WlPointerId,
+    pub con: Rc<UsrCon>,
+    pub owner: CloneCell<Option<Rc<dyn UsrWlPointerOwner>>>,
+    pub any_scroll_events: Cell<bool>,
+    pub pending_scroll: PendingScroll,
+}
+
+pub trait UsrWlPointerOwner {
+    fn enter(&self, ev: &Enter) {
+        let _ = ev;
+    }
+
+    fn leave(&self, ev: &Leave) {
+        let _ = ev;
+    }
+
+    fn motion(&self, ev: &Motion) {
+        let _ = ev;
+    }
+
+    fn button(&self, ev: &Button) {
+        let _ = ev;
+    }
+
+    fn scroll(&self, ps: &PendingScroll) {
+        let _ = ps;
+    }
+}
+
+impl UsrWlPointer {
+    pub fn set_cursor(&self, serial: u32, cursor: &UsrWlSurface, hot_x: i32, hot_y: i32) {
+        self.con.request(SetCursor {
+            self_id: self.id,
+            serial,
+            surface: cursor.id,
+            hotspot_x: hot_x,
+            hotspot_y: hot_y,
+        });
+    }
+
+    fn enter(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Enter = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.enter(&ev);
+        }
+        Ok(())
+    }
+
+    fn leave(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Leave = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.leave(&ev);
+        }
+        Ok(())
+    }
+
+    fn motion(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Motion = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.motion(&ev);
+        }
+        Ok(())
+    }
+
+    fn button(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Button = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.button(&ev);
+        }
+        Ok(())
+    }
+
+    fn axis(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Axis = self.con.parse(self, parser)?;
+        self.pending_scroll.time_usec.set(ev.time as u64 * 1000);
+        if ev.axis < 2 {
+            self.pending_scroll.px[ev.axis as usize].set(Some(ev.value));
+        }
+        self.any_scroll_events.set(true);
+        Ok(())
+    }
+
+    fn frame(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let _ev: Frame = self.con.parse(self, parser)?;
+        if self.any_scroll_events.take() {
+            let pe = self.pending_scroll.take();
+            if let Some(owner) = self.owner.get() {
+                owner.scroll(&pe);
+            }
+        }
+        Ok(())
+    }
+
+    fn axis_source(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: AxisSource = self.con.parse(self, parser)?;
+        self.pending_scroll.source.set(Some(ev.axis_source));
+        self.any_scroll_events.set(true);
+        Ok(())
+    }
+
+    fn axis_stop(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: AxisStop = self.con.parse(self, parser)?;
+        self.pending_scroll.time_usec.set(ev.time as u64 * 1000);
+        if ev.axis < 2 {
+            self.pending_scroll.stop[ev.axis as usize].set(true);
+        }
+        self.any_scroll_events.set(true);
+        Ok(())
+    }
+
+    fn axis_discrete(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let _ev: AxisDiscrete = self.con.parse(self, parser)?;
+        self.any_scroll_events.set(true);
+        Ok(())
+    }
+
+    fn axis_value120(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: AxisValue120 = self.con.parse(self, parser)?;
+        if ev.axis < 2 {
+            self.pending_scroll.v120[ev.axis as usize].set(Some(ev.value120));
+        }
+        self.any_scroll_events.set(true);
+        Ok(())
+    }
+}
+
+usr_object_base! {
+    UsrWlPointer, WlPointer;
+
+    ENTER => enter,
+    LEAVE => leave,
+    MOTION => motion,
+    BUTTON => button,
+    AXIS => axis,
+    FRAME => frame,
+    AXIS_SOURCE => axis_source,
+    AXIS_STOP => axis_stop,
+    AXIS_DISCRETE => axis_discrete,
+    AXIS_VALUE120 => axis_value120,
+}
+
+impl UsrObject for UsrWlPointer {
+    fn destroy(&self) {
+        self.con.request(Release { self_id: self.id });
+    }
+
+    fn break_loops(&self) {
+        self.owner.take();
+    }
+}