Implement content-addressed resource storage for raster images (#4148)

* Implement content-addressed resource storage

* Implement OPFS resource storage

* Remove ResourceStorage::read

* Review

editor/src/messages/frontend/frontend_message.rs

@@ -1,7 +1,7 @@
 use super::IconName;
 use super::utility_types::{MouseCursorIcon, PersistedState};
 use crate::messages::app_window::app_window_message_handler::AppWindowPlatform;
-use crate::messages::frontend::utility_types::{DocumentInfo, EyedropperPreviewImage};
+use crate::messages::frontend::utility_types::{DocumentInfo, EyedropperPreviewImage, FrontendMessageFuture};
 use crate::messages::input_mapper::utility_types::misc::ActionShortcut;
 use crate::messages::layout::utility_types::widget_prelude::*;
 use crate::messages::portfolio::document::node_graph::utility_types::{
@@ -27,6 +27,13 @@ use crate::messages::portfolio::document::overlays::utility_types::OverlayContex
 #[derive(derivative::Derivative, Clone, serde::Serialize, serde::Deserialize)]
 #[derivative(Debug, PartialEq)]
 pub enum FrontendMessage {
+	Await {
+		#[serde(skip, default)]
+		#[derivative(Debug = "ignore", PartialEq = "ignore")]
+		#[cfg_attr(feature = "wasm", tsify(type = "unknown"))]
+		future: FrontendMessageFuture,
+	},
+
 	// Display prefix: make the frontend show something, like a dialog
 	DisplayDialog {
 		title: String,

editor/src/messages/frontend/mod.rs

@@ -4,6 +4,7 @@ pub mod utility_types;
 
 #[doc(inline)]
 pub use frontend_message::{FrontendMessage, FrontendMessageDiscriminant};
+pub use utility_types::FrontendMessageFuture;
 
 // TODO: Make this an enum with the actual icon names, somehow derived from or tied to the frontend icon set.
 // TODO: Then remove `#[widget_builder(string)]` from all icon fields.

editor/src/messages/frontend/utility_types.rs

@@ -1,4 +1,9 @@
+use std::future::{Future, IntoFuture};
 use std::path::PathBuf;
+use std::pin::Pin;
+use std::sync::{Arc, Mutex};
+
+use graph_craft::application_io::ResourceHash;
 
 use crate::messages::portfolio::document::utility_types::document_metadata::LayerNodeIdentifier;
 use crate::messages::portfolio::utility_types::WorkspacePanelLayout;
@@ -10,6 +15,9 @@ pub struct DocumentInfo {
 	pub id: DocumentId,
 	pub name: String,
 	#[serde(default)]
+	#[cfg_attr(feature = "wasm", tsify(type = "unknown"))]
+	pub resources: Option<Box<[ResourceHash]>>,
+	#[serde(default)]
 	pub path: Option<PathBuf>,
 	pub is_saved: bool,
 }
@@ -77,3 +85,31 @@ pub struct EyedropperPreviewImage {
 	pub width: u32,
 	pub height: u32,
 }
+
+#[derive(Clone, Default)]
+pub struct FrontendMessageFuture {
+	inner: Arc<Mutex<Option<InnerFrontendMessageFuture>>>,
+}
+
+impl FrontendMessageFuture {
+	pub fn new(future: impl Future<Output = FrontendMessage> + Send + 'static) -> Self {
+		Self {
+			inner: Arc::new(Mutex::new(Some(Box::pin(future)))),
+		}
+	}
+}
+
+type InnerFrontendMessageFuture = Pin<Box<dyn Future<Output = FrontendMessage> + Send + 'static>>;
+
+impl IntoFuture for FrontendMessageFuture {
+	type Output = FrontendMessage;
+	type IntoFuture = InnerFrontendMessageFuture;
+
+	fn into_future(self) -> Self::IntoFuture {
+		self.inner
+			.lock()
+			.unwrap_or_else(|poisoned| poisoned.into_inner())
+			.take()
+			.expect("FrontendMessageFuture can only be awaited once")
+	}
+}