Restructure the entire editor codebase to consistently match the message hierarchy

Closes #744

editor/src/application.rs

@@ -0,0 +1,83 @@
+use crate::dispatcher::Dispatcher;
+use crate::messages::prelude::*;
+
+use rand_chacha::rand_core::{RngCore, SeedableRng};
+use rand_chacha::ChaCha20Rng;
+use spin::Mutex;
+use std::cell::Cell;
+
+static RNG: Mutex<Option<ChaCha20Rng>> = Mutex::new(None);
+thread_local! {
+	pub static UUID_SEED: Cell<Option<u64>> = Cell::new(None);
+}
+
+// TODO: serialize with serde to save the current editor state
+pub struct Editor {
+	pub dispatcher: Dispatcher,
+}
+
+impl Editor {
+	/// Construct a new editor instance.
+	/// Remember to provide a random seed with `editor::set_uuid_seed(seed)` before any editors can be used.
+	pub fn new() -> Self {
+		Self { dispatcher: Dispatcher::new() }
+	}
+
+	pub fn handle_message<T: Into<Message>>(&mut self, message: T) -> Vec<FrontendMessage> {
+		self.dispatcher.handle_message(message);
+
+		let mut responses = Vec::new();
+		std::mem::swap(&mut responses, &mut self.dispatcher.responses);
+
+		responses
+	}
+}
+
+impl Default for Editor {
+	fn default() -> Self {
+		Self::new()
+	}
+}
+
+pub fn set_uuid_seed(random_seed: u64) {
+	UUID_SEED.with(|seed| seed.set(Some(random_seed)))
+}
+
+pub fn generate_uuid() -> u64 {
+	let mut lock = RNG.lock();
+	if lock.is_none() {
+		UUID_SEED.with(|seed| {
+			let random_seed = seed.get().expect("Random seed not set before editor was initialized");
+			*lock = Some(ChaCha20Rng::seed_from_u64(random_seed));
+		})
+	}
+	lock.as_mut().map(ChaCha20Rng::next_u64).unwrap()
+}
+
+pub fn release_series() -> String {
+	format!("Release Series: {}", env!("GRAPHITE_RELEASE_SERIES"))
+}
+
+pub fn commit_info() -> String {
+	format!("{}\n{}\n{}", commit_timestamp(), commit_hash(), commit_branch())
+}
+
+pub fn commit_info_localized(localized_commit_date: &str) -> String {
+	format!("{}\n{}\n{}", commit_timestamp_localized(localized_commit_date), commit_hash(), commit_branch())
+}
+
+pub fn commit_timestamp() -> String {
+	format!("Date: {}", env!("GRAPHITE_GIT_COMMIT_DATE"))
+}
+
+pub fn commit_timestamp_localized(localized_commit_date: &str) -> String {
+	format!("Date: {}", localized_commit_date)
+}
+
+pub fn commit_hash() -> String {
+	format!("Hash: {}", &env!("GRAPHITE_GIT_COMMIT_HASH")[..8])
+}
+
+pub fn commit_branch() -> String {
+	format!("Branch: {}", env!("GRAPHITE_GIT_COMMIT_BRANCH"))
+}