Merge branch 'master' into explore-input-method2

core/src/mouse/cursor.rs

@@ -1,13 +1,14 @@
 use crate::{Point, Rectangle, Transformation, Vector};
 
-use std::ops::Mul;
-
 /// The mouse cursor state.
 #[derive(Debug, Clone, Copy, PartialEq, Default)]
 pub enum Cursor {
     /// The cursor has a defined position.
     Available(Point),
 
+    /// The cursor has a defined position, but it's levitating over a layer above.
+    Levitating(Point),
+
     /// The cursor is currently unavailable (i.e. out of bounds or busy).
     #[default]
     Unavailable,
@@ -18,7 +19,7 @@ impl Cursor {
     pub fn position(self) -> Option<Point> {
         match self {
             Cursor::Available(position) => Some(position),
-            Cursor::Unavailable => None,
+            Cursor::Levitating(_) | Cursor::Unavailable => None,
         }
     }
 
@@ -51,17 +52,41 @@ impl Cursor {
     pub fn is_over(self, bounds: Rectangle) -> bool {
         self.position_over(bounds).is_some()
     }
+
+    /// Returns true if the [`Cursor`] is levitating over a layer above.
+    pub fn is_levitating(self) -> bool {
+        matches!(self, Self::Levitating(_))
+    }
+
+    /// Makes the [`Cursor`] levitate over a layer above.
+    pub fn levitate(self) -> Self {
+        match self {
+            Self::Available(position) => Self::Levitating(position),
+            _ => self,
+        }
+    }
+
+    /// Brings the [`Cursor`] back to the current layer.
+    pub fn land(self) -> Self {
+        match self {
+            Cursor::Levitating(position) => Cursor::Available(position),
+            _ => self,
+        }
+    }
 }
 
-impl Mul<Transformation> for Cursor {
+impl std::ops::Mul<Transformation> for Cursor {
     type Output = Self;
 
     fn mul(self, transformation: Transformation) -> Self {
         match self {
-            Cursor::Unavailable => Cursor::Unavailable,
-            Cursor::Available(point) => {
-                Cursor::Available(point * transformation)
+            Self::Available(position) => {
+                Self::Available(position * transformation)
             }
+            Self::Levitating(position) => {
+                Self::Levitating(position * transformation)
+            }
+            Self::Unavailable => Self::Unavailable,
         }
     }
 }

core/src/shell.rs

@@ -77,6 +77,18 @@ impl<'a, Message> Shell<'a, Message> {
         self.redraw_request
     }
 
+    /// Replaces the redraw request of the [`Shell`]; without conflict resolution.
+    ///
+    /// This is useful if you want to overwrite the redraw request to a previous value.
+    /// Since it's a fairly advanced use case and should rarely be used, it is a static
+    /// method.
+    pub fn replace_redraw_request(
+        shell: &mut Self,
+        redraw_request: window::RedrawRequest,
+    ) {
+        shell.redraw_request = redraw_request;
+    }
+
     /// Requests the current [`InputMethod`] strategy.
     ///
     /// __Important__: This request will only be honored by the