fix(desktop-entries): Adhere to NotShowIn restriction

Closes #20

Cargo.lock

@@ -1269,6 +1269,7 @@ dependencies = [
  "tracing",
  "tracing-subscriber",
  "urlencoding",
+ "ward",
  "zbus",
  "zvariant",
 ]
@@ -1860,6 +1861,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
 
+[[package]]
+name = "ward"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1cbcd609d606e1307a1530061482ed2ee3fc9963128990238cefb2013127b61e"
+
 [[package]]
 name = "wasi"
 version = "0.10.2+wasi-snapshot-preview1"

plugins/Cargo.toml

@@ -29,3 +29,4 @@ tracing-subscriber = "0.2"
 urlencoding = "2"
 zbus = "1"
 zvariant = "=2.6" # Restrict for 1.47
+ward = "2.1.0"

plugins/src/desktop_entries/mod.rs

@@ -94,26 +94,44 @@ impl<W: AsyncWrite + Unpin> App<W> {
         for (src, path) in DesktopIter::new(default_paths()) {
             if let Ok(bytes) = std::fs::read_to_string(&path) {
                 if let Ok(entry) = DesktopEntry::decode(&path, &bytes) {
-                    // If defined to only show in a specific DE, avoid showing it if invalid.
-                    let mut desktop_matched = false;
-                    if let Some(desktops) = entry.only_show_in() {
-                        desktop_matched = match current.as_ref() {
-                            Some(current) => desktops
-                                .to_ascii_lowercase()
-                                .split(';')
-                                .any(|desktop| current.iter().any(|c| *c == desktop)),
-                            None => false,
-                        };
+                    // Do not show if our desktop is defined in `NotShowIn`.
+                    if let Some(not_show_in) = entry.desktop_entry("NotShowIn") {
+                        let current = ward::ward!(current.as_ref(), else { continue });
 
-                        if !desktop_matched {
+                        let matched = not_show_in
+                            .to_ascii_lowercase()
+                            .split(';')
+                            .any(|desktop| current.iter().any(|c| *c == desktop));
+
+                        if matched {
                             continue;
                         }
                     }
 
-                    if entry.no_display()
-                        && (!desktop_matched
-                            || entry.name(None).map_or(false, |v| v == "GNOME Shell"))
-                    {
+                    // Track this condition so that we can override `NoDisplay` if this is true.
+                    let mut only_show_in = false;
+
+                    // Do not show if our desktop is not defined in `OnlyShowIn`.
+                    if let Some(desktops) = entry.only_show_in() {
+                        let current = ward::ward!(current.as_ref(), else { continue });
+
+                        only_show_in = desktops
+                            .to_ascii_lowercase()
+                            .split(';')
+                            .any(|desktop| current.iter().any(|c| *c == desktop));
+
+                        if !only_show_in {
+                            continue;
+                        }
+                    }
+
+                    // Avoid showing the GNOME Shell entry entirely
+                    if entry.name(None).map_or(false, |v| v == "GNOME Shell") {
+                        continue;
+                    }
+
+                    // And also avoid showing anything that's set as `NoDisplay`
+                    if !only_show_in && entry.no_display() {
                         continue;
                     }