Ely Office: six offline-first desktop apps in Rust and GPUI

ElyDoc, ElyTable, ElyShow (LibreOfficeKit), ElyPDF (MuPDF), ElyTree (Git),
ElyMark (Milkdown and CodeMirror in CEF). ElyMail and ElyAgent follow.

crates/ely-ui/src/theme/watch.rs

@@ -0,0 +1,57 @@
+use std::{
+    path::{Path, PathBuf},
+    time::Duration,
+};
+
+use futures::StreamExt;
+use gpui::{App, AsyncApp};
+
+use super::{OmarchyState, apply, omarchy};
+
+const SETTLE: Duration = Duration::from_millis(250);
+
+/// Loads the Omarchy theme now and after each change.
+pub(super) fn start(dir: PathBuf, cx: &mut App) {
+    reload(&dir, cx);
+    let (watcher, mut changes) = match omarchy::changes(&dir) {
+        Ok(watch) => watch,
+        Err(error) => {
+            log::error!("theme: omarchy sync does not follow changes: {error:#}");
+            return;
+        }
+    };
+    cx.spawn(async move |cx: &mut AsyncApp| {
+        let _watcher = watcher;
+        while changes.next().await.is_some() {
+            cx.background_executor().timer(SETTLE).await;
+            while changes.try_recv().is_ok() {}
+            cx.update(|cx| reload(&dir, cx));
+        }
+    })
+    .detach();
+}
+
+fn reload(dir: &Path, cx: &mut App) {
+    match omarchy::load(dir) {
+        Ok(Some(theme)) => {
+            let name = theme.name.as_deref().unwrap_or("unnamed");
+            if !theme.standing_in.is_empty() {
+                log::warn!(
+                    "theme: omarchy {name} lacks {}, Ely's colors stand in",
+                    theme.standing_in.join(", ")
+                );
+            }
+            cx.global_mut::<OmarchyState>().0 = Some(theme);
+            apply(cx, false);
+        }
+        Ok(None) => {
+            if cx.global_mut::<OmarchyState>().0.take().is_some() {
+                log::info!("theme: omarchy theme has no colors.toml, Ely's own colors again");
+                apply(cx, false);
+            }
+        }
+        Err(error) => {
+            log::error!("theme: omarchy theme ignored, the current colors stay: {error:#}");
+        }
+    }
+}