fixes for mpv focus switching

- avoid changing focus if an Anki window is already focused
- only try to restore focus when playing videos

anki/sound.py

@@ -102,7 +102,7 @@ class MpvManager(MPV):
         super().__init__(window_id=None, debug=False)
 
     def queueFile(self, file):
-        runHook("mpvWillPlay")
+        runHook("mpvWillPlay", file)
 
         path = os.path.join(os.getcwd(), file)
         self.command("loadfile", path, "append-play")

aqt/main.py

@@ -970,13 +970,19 @@ Difference to correct time: %s.""") % diffText
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 and if the problem comes up again, please ask on the support site."""))
 
-    def onMpvWillPlay(self):
-        if not self._activeWindowOnPlay:
-            self._activeWindowOnPlay = self.app.activeWindow()
+    def _isVideo(self, file):
+        head, ext = os.path.splitext(file.lower())
+        return ext in (".mp4", ".mov", ".mpg", ".mpeg", ".mkv", ".avi")
+
+    def onMpvWillPlay(self, file):
+        if not self._isVideo(file):
+            return
+
+        self._activeWindowOnPlay = self.app.activeWindow() or self._activeWindowOnPlay
 
     def onMpvIdle(self):
         w = self._activeWindowOnPlay
-        if w and not sip.isdeleted(w) and w.isVisible():
+        if not self.app.activeWindow() and w and not sip.isdeleted(w) and w.isVisible():
             w.activateWindow()
             w.raise_()
         self._activeWindowOnPlay = None