From 4b081e27d46246eb7b38b793e13c8bc9bcb2a9bd Mon Sep 17 00:00:00 2001
From: Ian Douglas Scott <idscott@system76.com>
Date: Wed, 24 Apr 2024 19:44:26 -0700
Subject: [PATCH] libei touch events

---
 src/backend/libei/mod.rs | 76 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 67 insertions(+), 9 deletions(-)

diff --git a/src/backend/libei/mod.rs b/src/backend/libei/mod.rs
index ba3d009c2971..87bbee6012fe 100644
--- a/src/backend/libei/mod.rs
+++ b/src/backend/libei/mod.rs
@@ -117,13 +117,9 @@ impl InputBackend for EiInput {
     type GestureHoldBeginEvent = input::UnusedEvent;
     type GestureHoldEndEvent = input::UnusedEvent;
 
-    // TODO
-    // type TouchDownEvent = request::TouchDown;
-    // type TouchUpEvent = request::TouchUp;
-    // type TouchMotionEvent = request::TouchMotion;
-    type TouchDownEvent = input::UnusedEvent;
-    type TouchUpEvent = input::UnusedEvent;
-    type TouchMotionEvent = input::UnusedEvent;
+    type TouchDownEvent = request::TouchDown;
+    type TouchUpEvent = request::TouchUp;
+    type TouchMotionEvent = request::TouchMotion;
     type TouchCancelEvent = input::UnusedEvent; // XXX?
     type TouchFrameEvent = input::UnusedEvent; // XXX
 
@@ -312,7 +308,62 @@ impl input::AbsolutePositionEvent<EiInput> for request::PointerMotionAbsolute {
     }
 }
 
-// Want event source producing (among others?) InputEvent<LibinputInputBackend>
+impl input::TouchDownEvent<EiInput> for request::TouchDown {}
+impl input::TouchEvent<EiInput> for request::TouchDown {
+    fn slot(&self) -> input::TouchSlot {
+        Some(self.touch_id).into()
+    }
+}
+impl input::AbsolutePositionEvent<EiInput> for request::TouchDown {
+    fn x(&self) -> f64 {
+        self.x.into()
+    }
+
+    fn y(&self) -> f64 {
+        self.y.into()
+    }
+
+    fn x_transformed(&self, _width: i32) -> f64 {
+        // XXX ?
+        self.x.into()
+    }
+
+    fn y_transformed(&self, _height: i32) -> f64 {
+        self.y.into()
+    }
+}
+
+impl input::TouchUpEvent<EiInput> for request::TouchUp {}
+impl input::TouchEvent<EiInput> for request::TouchUp {
+    fn slot(&self) -> input::TouchSlot {
+        Some(self.touch_id).into()
+    }
+}
+
+impl input::TouchMotionEvent<EiInput> for request::TouchMotion {}
+impl input::TouchEvent<EiInput> for request::TouchMotion {
+    fn slot(&self) -> input::TouchSlot {
+        Some(self.touch_id).into()
+    }
+}
+impl input::AbsolutePositionEvent<EiInput> for request::TouchMotion {
+    fn x(&self) -> f64 {
+        self.x.into()
+    }
+
+    fn y(&self) -> f64 {
+        self.y.into()
+    }
+
+    fn x_transformed(&self, _width: i32) -> f64 {
+        // XXX ?
+        self.x.into()
+    }
+
+    fn y_transformed(&self, _height: i32) -> f64 {
+        self.y.into()
+    }
+}
 
 impl EventSource for EiInput {
     type Event = InputEvent<EiInput>;
@@ -487,7 +538,14 @@ fn convert_request(request: EisRequest) -> Option<InputEvent<EiInput>> {
         EisRequest::ScrollDiscrete(event) => Some(InputEvent::PointerAxis {
             event: ScrollEvent::Discrete(event),
         }),
-        _ => None,
+        EisRequest::TouchDown(event) => Some(InputEvent::TouchDown { event }),
+        EisRequest::TouchUp(event) => Some(InputEvent::TouchUp { event }),
+        EisRequest::TouchMotion(event) => Some(InputEvent::TouchMotion { event }),
+        EisRequest::Frame(_) => None, // TODO
+        EisRequest::Disconnect
+        | EisRequest::Bind(_)
+        | EisRequest::DeviceStartEmulating(_)
+        | EisRequest::DeviceStopEmulating(_) => None,
     }
 }