CHANGE right-click in the editor to show option to open folder in linux (#4125)

* CHANGE right-click in the editor to show option to open folder in linux

* FIX checks

* Use heuristics

* ./ninja format

* Use fallback from main instead of xdg-open

qt/aqt/editor.py

@@ -36,7 +36,7 @@ from anki.hooks import runFilter
 from anki.httpclient import HttpClient
 from anki.models import NotetypeDict, NotetypeId, StockNotetype
 from anki.notes import Note, NoteFieldsCheckResult, NoteId
-from anki.utils import checksum, is_lin, is_mac, is_win, namedtmp
+from anki.utils import checksum, is_lin, is_win, namedtmp
 from aqt import AnkiQt, colors, gui_hooks
 from aqt.operations import QueryOp
 from aqt.operations.note import update_note
@@ -1735,7 +1735,6 @@ class EditorWebView(AnkiWebView):
         assert a is not None
         qconnect(a.triggered, lambda: openFolder(path))
 
-        if is_win or is_mac:
         a = menu.addAction(tr.editing_show_in_folder())
         assert a is not None
         qconnect(a.triggered, lambda: show_in_folder(path))

qt/aqt/utils.py

@@ -935,6 +935,31 @@ def show_in_folder(path: str) -> None:
         end tell
         """
         call(osascript_to_args(script))
+    else:
+        # For linux, there are multiple file managers. Let's test if one of the
+        # most common file managers is found and use it in case it is installed.
+        # If none of this list are installed, use a fallback. The fallback
+        # might open the image in a web browser, image viewer or others,
+        # depending on the users defaults.
+        file_managers = [
+            "nautilus",  # GNOME
+            "dolphin",  # KDE
+            "pcmanfm",  # LXDE
+            "thunar",  # XFCE
+            "nemo",  # Cinnamon
+            "caja",  # MATE
+        ]
+
+        available_file_manager = None
+
+        # Test if a file manager is installed and use it, fallback otherwise
+        for file_manager in file_managers:
+            if shutil.which(file_manager):
+                available_file_manager = file_manager
+                break
+
+        if available_file_manager:
+            subprocess.run([available_file_manager, path], check=False)
         else:
             # Just open the file in any other platform
             with no_bundled_libs():