Simplify platform-specific keyboard layouts with Accel key and global platform variable (#748)

* Simplify platform-specific keyboard layouts with Accel key and global platform variable


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

editor/src/messages/globals/global_variables.rs

@@ -0,0 +1,5 @@
+use crate::messages::portfolio::document::utility_types::misc::Platform;
+
+use once_cell::sync::OnceCell;
+
+pub static GLOBAL_PLATFORM: OnceCell<Platform> = OnceCell::new();

editor/src/messages/globals/globals_message.rs

@@ -0,0 +1,10 @@
+use crate::messages::portfolio::document::utility_types::misc::Platform;
+use crate::messages::prelude::*;
+
+use serde::{Deserialize, Serialize};
+
+#[impl_message(Message, Globals)]
+#[derive(PartialEq, Eq, Clone, Debug, Serialize, Deserialize)]
+pub enum GlobalsMessage {
+	SetPlatform { platform: Platform },
+}

editor/src/messages/globals/globals_message_handler.rs

@@ -0,0 +1,18 @@
+use crate::messages::prelude::*;
+
+#[derive(Debug, Default)]
+pub struct GlobalsMessageHandler {}
+
+impl MessageHandler<GlobalsMessage, ()> for GlobalsMessageHandler {
+	#[remain::check]
+	fn process_message(&mut self, message: GlobalsMessage, _data: (), _responses: &mut VecDeque<Message>) {
+		match message {
+			GlobalsMessage::SetPlatform { platform } => {
+				GLOBAL_PLATFORM.set(platform).expect("Failed to set GLOBAL_PLATFORM");
+			}
+		}
+	}
+
+	advertise_actions!(GlobalsMessageDiscriminant;
+	);
+}

editor/src/messages/globals/mod.rs

@@ -0,0 +1,9 @@
+mod globals_message;
+mod globals_message_handler;
+
+pub mod global_variables;
+
+#[doc(inline)]
+pub use globals_message::{GlobalsMessage, GlobalsMessageDiscriminant};
+#[doc(inline)]
+pub use globals_message_handler::GlobalsMessageHandler;