Restructure the entire editor codebase to consistently match the message hierarchy

Closes #744

editor/src/macros.rs

@@ -0,0 +1,56 @@
+/// Syntax sugar for initializing an `ActionList`
+///
+/// # Example
+///
+/// ```ignore
+/// actions!(DocumentMessage::Undo, DocumentMessage::Redo);
+/// ```
+///
+/// expands to:
+/// ```ignore
+/// vec![vec![DocumentMessage::Undo, DocumentMessage::Redo]];
+/// ```
+///
+/// and
+/// ```ignore
+/// actions!(DocumentMessage;
+///     Undo,
+///     Redo,
+/// );
+/// ```
+///
+/// expands to:
+/// ```ignore
+/// vec![vec![DocumentMessage::Undo, DocumentMessage::Redo]];
+/// ```
+///
+macro_rules! actions {
+	($($v:expr),* $(,)?) => {{
+		vec![$(vec![$v.into()]),*]
+	}};
+
+	($name:ident; $($v:ident),* $(,)?) => {{
+		vec![vec![$(($name::$v).into()),*]]
+	}};
+}
+
+/// Does the same thing as the `actions!` macro but wraps everything in:
+///
+/// ```ignore
+/// fn actions(&self) -> ActionList {
+///     actions!(…)
+/// }
+/// ```
+macro_rules! advertise_actions {
+	($($v:expr),* $(,)?) => {
+		fn actions(&self) -> $crate::utility_traits::ActionList {
+			actions!($($v),*)
+		}
+	};
+
+	($name:ident; $($v:ident),* $(,)?) => {
+		fn actions(&self) -> $crate::utility_traits::ActionList {
+			actions!($name; $($v),*)
+		}
+	}
+}