Remove Proton installations from app listings

Proton installations appear to create their own Wine prefixes since
November 2021 or so. Filter these apps from listings to prevent
confusion.

CHANGELOG.md

@@ -10,7 +10,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
  - Enable usage of Flatpak Protontricks with non-Flatpak Steam. Flatpak Steam is prioritized if both are found.
 
 ### Fixed
- - bwrap is only disabled when the Flatpak installation is too old. Flatpak 1.12.1 and newer support sub-sandboxes.  
+ - bwrap is only disabled when the Flatpak installation is too old. Flatpak 1.12.1 and newer support sub-sandboxes.
+ - Remove Proton installations from app listings
 
 ## [1.6.2] - 2021-11-28
 ### Changed

src/protontricks/cli/main.py

@@ -193,7 +193,7 @@ def exit_(error):
     # Run the GUI
     if args.gui:
         has_installed_apps = any([
-            app for app in steam_apps if app.prefix_path_exists and app.appid
+            app for app in steam_apps if app.is_windows_app
         ])
 
         if not has_installed_apps:
@@ -234,7 +234,7 @@ def exit_(error):
         search_query = " ".join(args.search)
         matching_apps = [
             app for app in steam_apps
-            if app.prefix_path_exists and app.name_contains(search_query)
+            if app.is_windows_app and app.name_contains(search_query)
         ]
 
         if matching_apps:
@@ -273,8 +273,8 @@ def exit_(error):
     try:
         steam_app = next(
             app for app in steam_apps
-            if not app.is_proton and app.appid == steam_appid
-            and app.prefix_path_exists)
+            if app.is_windows_app and app.appid == steam_appid
+        )
     except StopIteration:
         exit_(
             "Steam app with the given app ID could not be found. "

src/protontricks/gui.py

@@ -148,15 +148,15 @@ def run_gui(args, input_=None, strip_nonascii=False):
                 str(appid2icon[app.appid]),
                 "{}: {}".format(app.name, app.appid)
             ]
-            for app in steam_apps if app.prefix_path_exists and app.appid
+            for app in steam_apps if app.is_windows_app
         ]
         # Flatten the list
         cmd_input = list(itertools.chain.from_iterable(cmd_input))
     else:
         args = _get_zenity_args()
         cmd_input = [
             '{}: {}'.format(app.name, app.appid) for app in steam_apps
-            if app.prefix_path_exists and app.appid
+            if app.is_windows_app
         ]
 
     cmd_input = "\n".join(cmd_input)

src/protontricks/steam.py

@@ -122,6 +122,13 @@ def is_tool(self):
         """
         return (self.install_path / "toolmanifest.vdf").is_file()
 
+    @property
+    def is_windows_app(self):
+        """
+        Return True if this app is a Windows app that's launched using Proton
+        """
+        return not self.is_proton and self.prefix_path_exists and self.appid
+
     @property
     def proton_dist_path(self):
         """