feat(icon): optimize & bundle icons with crabtime for non-unix platforms

src/widget/icon/bundle.rs

@@ -0,0 +1,62 @@
+// Copyright 2025 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+//! Embedded icons for platforms which do not support icon themes yet.
+
+/// Icon bundling is not enabled on unix platforms.
+pub fn get(icon_name: &str) -> Option<super::Data> {
+    None
+}
+
+#[cfg(not(unix))]
+/// Get a bundled icon on non-unix platforms.
+pub fn get(icon_name: &str) -> Option<super::Data> {
+    ICONS
+        .get(icon_name)
+        .map(|bytes| super::Data::Svg(crate::iced::widget::svg::Handle::from_memory(*bytes)))
+}
+
+#[cfg(not(unix))]
+#[crabtime::expression]
+fn comptime_icon_bundler() -> String {
+    let manifest_dir = std::path::Path::new(crabtime::WORKSPACE_PATH);
+    let icon_paths = [
+        "cosmic-icons/freedesktop/scalable",
+        "cosmic-icons/extra/scalable",
+    ];
+
+    let key_value_assignments = icon_paths
+        .into_iter()
+        .map(|path| manifest_dir.join(path))
+        .inspect(|icon_path| assert!(icon_path.exists(), "path = {icon_path:?}"))
+        .map(|icon_path| std::fs::read_dir(icon_path).unwrap())
+        .flat_map(|dir| {
+            dir.flat_map(|entry| entry.unwrap().path().read_dir().unwrap())
+                .map(|entry| {
+                    let entry = entry.unwrap();
+                    let path = entry.path().canonicalize().unwrap();
+                    let file_name = path.file_stem().unwrap().to_str().unwrap().to_owned();
+                    let path = path.into_os_string().into_string().unwrap();
+                    (file_name, path)
+                })
+        })
+        .fold(
+            std::collections::BTreeMap::new(),
+            |mut set, (name, path)| {
+                set.insert(name, path);
+                set
+            },
+        )
+        .into_iter()
+        .fold(String::new(), |mut output, (name, path)| {
+            output.push_str(&format!("    \"{name}\" => include_bytes!(\"{path}\"),\n"));
+            output
+        });
+
+    ["phf::phf_map!(\n", &key_value_assignments, ")"].concat()
+}
+
+#[cfg(not(unix))]
+static ICONS: phf::Map<&'static str, &'static [u8]> = {
+    comptime_icon_bundler! {}
+};