KDE: Add support for window matching. (#448)

KDE: Add support for window matching.

README.md

@@ -208,7 +208,7 @@ modmap:
       not: [Application, ...]
       # or
       only: [Application, ...]
-    window: # Optional (only wlroots clients supported)
+    window: # Optional (only wlroots/kde clients supported)
       not: [/regex of window title/, ...]
       # or
       only: [/regex of window title/, ...]
@@ -266,7 +266,7 @@ keymap:
       not: [Application, ...]
       # or
       only: [Application, ...]
-    window: # Optional (only wlroots clients supported)
+    window: # Optional (only wlroots/kde clients supported)
       not: [/regex of window title/, ...]
       # or
       only: [/regex of window title/, ...]
@@ -344,7 +344,7 @@ However, it will only start printing, once a mapping has been triggered that use
 So you have to create a mapping with a filter using a dummy application name and trigger it.
 Then each time you switch to a new window xremap will print its caption, class, and name in the following style:
 `active window: caption: '<caption>', class: '<class>', name: '<name>'`
-You want to use the class for the filter.  
+The `class` property should be used for application matching, while the `caption` property should be used for window matching.
 
 If you use a systemd-daemon to manage xremap, the prints will be visible in the system-logs (Can be opened with `journalctl -f`)
 

src/client/kde_client.rs

@@ -174,12 +174,12 @@ impl Client for KdeClient {
         conn_res.is_ok()
     }
     fn current_window(&mut self) -> Option<String> {
-        // TODO:  not implemented
-        None
+        let aw = self.active_window.lock().ok()?;
+        Some(aw.title.clone())
     }
 
     fn current_application(&mut self) -> Option<String> {
-        let aw = self.active_window.lock().unwrap();
+        let aw = self.active_window.lock().ok()?;
         Some(aw.res_class.clone())
     }
 }