Show icons for toplevels

src/desktop_info.rs

@@ -0,0 +1,95 @@
+// Coppied from cosmic-app-list
+// - Put in a library? libcosmic?
+
+use freedesktop_desktop_entry::DesktopEntry;
+use itertools::Itertools;
+use std::path::PathBuf;
+
+pub fn icon_for_app_id(app_id: String) -> Option<PathBuf> {
+    Some(
+        desktop_info_for_app_ids(vec![app_id])
+            .into_iter()
+            .next()?
+            .icon,
+    )
+}
+
+#[derive(Debug, Clone, Default)]
+struct DesktopInfo {
+    id: String,
+    wm_class: Option<String>,
+    icon: PathBuf,
+    exec: String,
+    name: String,
+    path: PathBuf,
+}
+
+fn default_app_icon() -> PathBuf {
+    freedesktop_icons::lookup("application-default")
+        .with_theme("Cosmic")
+        .force_svg()
+        .with_cache()
+        .find()
+        .or_else(|| {
+            freedesktop_icons::lookup("application-x-executable")
+                .with_theme("default")
+                .with_size(128)
+                .with_cache()
+                .find()
+        })
+        .unwrap_or_default()
+}
+
+fn desktop_info_for_app_ids(mut app_ids: Vec<String>) -> Vec<DesktopInfo> {
+    let app_ids_clone = app_ids.clone();
+    let mut ret = freedesktop_desktop_entry::Iter::new(freedesktop_desktop_entry::default_paths())
+        .filter_map(|path| {
+            std::fs::read_to_string(&path).ok().and_then(|input| {
+                DesktopEntry::decode(&path, &input).ok().and_then(|de| {
+                    if let Some(i) = app_ids.iter().position(|s| {
+                        s == de.appid || s.eq(&de.startup_wm_class().unwrap_or_default())
+                    }) {
+                        let icon = freedesktop_icons::lookup(de.icon().unwrap_or(de.appid))
+                            .with_size(128)
+                            .with_cache()
+                            .find()
+                            .unwrap_or_else(default_app_icon);
+                        app_ids.remove(i);
+
+                        Some(DesktopInfo {
+                            id: de.appid.to_string(),
+                            wm_class: de.startup_wm_class().map(ToString::to_string),
+                            icon,
+                            exec: de.exec().unwrap_or_default().to_string(),
+                            name: de.name(None).unwrap_or_default().to_string(),
+                            path: path.clone(),
+                        })
+                    } else {
+                        None
+                    }
+                })
+            })
+        })
+        .collect_vec();
+    ret.append(
+        &mut app_ids
+            .into_iter()
+            .map(|id| DesktopInfo {
+                id,
+                icon: default_app_icon(),
+                ..Default::default()
+            })
+            .collect_vec(),
+    );
+    ret.sort_by(|a, b| {
+        app_ids_clone
+            .iter()
+            .position(|id| id == &a.id || Some(id) == a.wm_class.as_ref())
+            .cmp(
+                &app_ids_clone
+                    .iter()
+                    .position(|id| id == &b.id || Some(id) == b.wm_class.as_ref()),
+            )
+    });
+    ret
+}