Launcher: display window for failed world loads if any (#6058)

Launcher.py

@@ -36,6 +36,7 @@ if __name__ == "__main__":
     init_logging('Launcher')
 
 from worlds.LauncherComponents import Component, components, icon_paths, SuffixIdentifier, Type
+from worlds import failed_world_loads
 
 
 def open_host_yaml():
@@ -275,6 +276,7 @@ def run_gui(launch_components: list[Component], args: Any) -> None:
         search_box: MDTextField = ObjectProperty(None)
         cards: list[LauncherCard]
         current_filter: Sequence[str | Type] | None
+        failed_worlds: bool = bool(failed_world_loads)
 
         def __init__(self, ctx=None, components=None, args=None):
             self.title = self.base_title + " " + Utils.__version__
@@ -422,6 +424,39 @@ def run_gui(launch_components: list[Component], args: Any) -> None:
             MDSnackbar(MDSnackbarText(text=open_text), y=dp(24), pos_hint={"center_x": 0.5},
                        size_hint_x=0.5).open()
 
+        @staticmethod
+        def copy_to_clipboard(text):
+            from kivy.core.clipboard import Clipboard
+            Clipboard.copy(text)
+            MDSnackbar(MDSnackbarText(text="Copied to clipboard."), y=dp(24), pos_hint={"center_x": 0.5},
+                       size_hint_x=0.5).open()
+
+        def display_failed(self):
+            """Display a dialog showing the exceptions produced by any world that failed to load during
+            initialization."""
+            if not self.failed_worlds:
+                return
+            from kivymd.uix.dialog import MDDialog, MDDialogIcon, MDDialogHeadlineText, MDDialogContentContainer
+            from kivymd.uix.divider import MDDivider
+            from kivymd.uix.list import MDListItem, MDListItemHeadlineText, MDListItemSupportingText
+            entries = []
+            for world, reason in failed_world_loads.items():
+                entries.append(MDListItem(
+                    MDListItemHeadlineText(text=world),
+                    MDListItemSupportingText(text=reason),
+                    on_release=lambda x, r=reason: self.copy_to_clipboard(r)
+                ))
+            dialog = MDDialog(
+                MDDialogIcon(icon="alert"),
+                MDDialogHeadlineText(text="Failed World Loads"),
+                MDDialogContentContainer(
+                    MDDivider(),
+                    *entries,
+                    orientation="vertical",
+                )
+            )
+            dialog.open()
+
         def _on_drop_file(self, window: Window, filename: bytes, x: int, y: int) -> None:
             """ When a patch file is dropped into the window, run the associated component. """
             file, component = identify(filename.decode())