feat: somewhere to place extra actions by platform

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `style` attribute for `Font`. [#2041](https://github.com/iced-rs/iced/pull/2041)
 - Texture filtering options for `Image`. [#1894](https://github.com/iced-rs/iced/pull/1894)
 - `default` and `shift_step` methods for `slider` widgets. [#2100](https://github.com/iced-rs/iced/pull/2100)
+- `Custom` variant to `command::Action`. [#2146](https://github.com/iced-rs/iced/pull/2146)
 
 ### Changed
 - Enable WebGPU backend in `wgpu` by default instead of WebGL. [#2068](https://github.com/iced-rs/iced/pull/2068)
@@ -101,6 +102,7 @@ Many thanks to...
 - @casperstorm
 - @cfrenette
 - @Davidster
+- @Decodetalkers
 - @derezzedex
 - @dtzxporter
 - @GyulyVGC

runtime/src/command/action.rs

@@ -1,11 +1,11 @@
 use crate::clipboard;
 use crate::core::widget;
 use crate::font;
+use crate::futures::MaybeSend;
 use crate::system;
 use crate::window;
 
-use iced_futures::MaybeSend;
-
+use std::any::Any;
 use std::borrow::Cow;
 use std::fmt;
 
@@ -43,6 +43,9 @@ pub enum Action<T> {
         /// The message to produce when the font has been loaded.
         tagger: Box<dyn Fn(Result<(), font::Error>) -> T>,
     },
+
+    /// A custom action supported by a specific runtime.
+    Custom(Box<dyn Any>),
 }
 
 impl<T> Action<T> {
@@ -72,6 +75,7 @@ impl<T> Action<T> {
                 bytes,
                 tagger: Box::new(move |result| f(tagger(result))),
             },
+            Self::Custom(custom) => Action::Custom(custom),
         }
     }
 }
@@ -90,6 +94,7 @@ impl<T> fmt::Debug for Action<T> {
             Self::System(action) => write!(f, "Action::System({action:?})"),
             Self::Widget(_action) => write!(f, "Action::Widget"),
             Self::LoadFont { .. } => write!(f, "Action::LoadFont"),
+            Self::Custom(_) => write!(f, "Action::Custom"),
         }
     }
 }

winit/src/application.rs

@@ -861,6 +861,9 @@ pub fn run_command<A, C, E>(
                     .send_event(tagger(Ok(())))
                     .expect("Send message to event loop");
             }
+            command::Action::Custom(_) => {
+                log::warn!("Unsupported custom action in `iced_winit` shell");
+            }
         }
     }
 }

winit/src/multi_window.rs

@@ -1127,6 +1127,9 @@ fn run_command<A, C, E>(
                     .send_event(tagger(Ok(())))
                     .expect("Send message to event loop");
             }
+            command::Action::Custom(_) => {
+                log::warn!("Unsupported custom action in `iced_winit` shell");
+            }
         }
     }
 }