Add full support for Mac-specific keyboard layouts (#736)

* IPP for Mac, flawed initial experiments

* Cleanup and progress, but not compiling yet

* Fix error and rename nonmac -> standard

* Extentd ipp macros to accomodate mac input

* Add Mac versions of shortcuts; refactor and document the input mapper macros

* Change frontend styling for user input labels in floating menus

* Additional macro documentation

* A little more documentation

* Improve entry macro syntax

* Move input mapper macros to a separate file

* Adapt the keyboard shortcuts to the user's OS

* Display keyboard shortcuts in the menu bar based on OS

* Change Input Mapper macro syntax from {} to ()

* Fix esc key bug in Vue

* Tweaks

* Interim solution for Mac-specific hints

* Feed tooltip input hotkeys from their actions

* Fix hotkeys for tools because of missing actions

* Make Vue respect Ctrl/Cmd differences per platform

* Remove commented lines

* Code review pass by me

* Code review suggestions with TrueDoctor

* Turn FutureKeyMapping struct into ActionKeys enum which is a bit cleaner

* Add serde derive attributes for message discriminants

* Re-add serde deserialize

* Fix not mutating ActionKeys conversion; remove custom serializer

* Add serde to dev dependencies

Co-authored-by: Dennis <dennis@kobert.dev>

proc-macros/Cargo.toml

@@ -2,7 +2,7 @@
 name = "graphite-proc-macros"
 publish = false
 version = "0.0.0"
-rust-version = "1.56.0"
+rust-version = "1.62.0"
 authors = ["Graphite Authors <contact@graphite.rs>"]
 edition = "2021"
 readme = "../README.md"
@@ -14,6 +14,10 @@ license = "Apache-2.0"
 path = "src/lib.rs"
 proc-macro = true
 
+[features]
+default = ["serde-discriminant"]
+serde-discriminant = []
+
 [dependencies]
 proc-macro2 = "1.0.26"
 syn = { version = "1.0.68", features = ["full"] }
@@ -22,3 +26,6 @@ quote = "1.0.9"
 [dev-dependencies.editor]
 path = "../editor"
 package = "graphite-editor"
+
+[dev-dependencies]
+serde = "1"

proc-macros/src/discriminant.rs

@@ -112,8 +112,16 @@ pub fn derive_discriminant_impl(input_item: TokenStream) -> syn::Result<TokenStr
 			)
 		})
 		.unzip::<_, _, Vec<_>, Vec<_>>();
+	#[cfg(feature = "serde-discriminant")]
+	let serde = quote::quote! {
+		#[derive(serde::Serialize, serde::Deserialize)]
+	};
+
+	#[cfg(not(feature = "serde-discriminant"))]
+	let serde = quote::quote! {};
 
 	let res = quote::quote! {
+		#serde
 		#discriminant
 
 		impl ToDiscriminant for #input_type {