config: add app-id window criteria

jay-config/src/_private.rs

@@ -115,4 +115,5 @@ pub enum WindowCriterionIpc {
 #[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq)]
 pub enum WindowCriterionStringField {
     Title,
+    AppId,
 }

jay-config/src/_private/client.rs

@@ -1655,6 +1655,8 @@ impl ConfigClient {
             }
             WindowCriterion::Title(t) => string!(t, Title, false),
             WindowCriterion::TitleRegex(t) => string!(t, Title, true),
+            WindowCriterion::AppId(t) => string!(t, AppId, false),
+            WindowCriterion::AppIdRegex(t) => string!(t, AppId, true),
         };
         let res = self.send_with_response(&ClientMessage::CreateWindowMatcher { criterion });
         get_response!(

jay-config/src/window.rs

@@ -240,6 +240,10 @@ pub enum WindowCriterion<'a> {
     Title(&'a str),
     /// Matches the title of the window with a regular expression.
     TitleRegex(&'a str),
+    /// Matches the app-id of the window verbatim.
+    AppId(&'a str),
+    /// Matches the app-id of the window with a regular expression.
+    AppIdRegex(&'a str),
 }
 
 impl WindowCriterion<'_> {