Add a tab-scope object registry.

qutebrowser/utils/objreg.py

@@ -36,6 +36,13 @@ class UnsetObject:
     __slots__ = ()
 
 
+class RegistryUnavailableError(Exception):
+
+    """Exception raised when a certain registry does not exist yet."""
+
+    pass
+
+
 _UNSET = UnsetObject()
 
 
@@ -81,6 +88,11 @@ def _get_registry(scope):
     """Get the correct registry for a given scope."""
     if scope == 'global':
         return global_registry
+    elif scope == 'tab':
+        widget = get('tabbed-browser').currentWidget()
+        if widget is None:
+            raise RegistryUnavailableError(scope)
+        return widget.registry
     else:
         raise ValueError("Invalid scope '{}'!".format(scope))
 

qutebrowser/widgets/webview.py

@@ -51,6 +51,7 @@ class WebView(QWebView):
         open_target: Where to open the next tab ("normal", "tab", "tab_bg")
         viewing_source: Whether the webview is currently displaying source
                         code.
+        registry: The ObjectRegistry associated with this tab.
         _cur_url: The current URL (accessed via cur_url property).
         _has_ssl_errors: Whether SSL errors occured during loading.
         _zoom: A NeighborList with the zoom levels.
@@ -89,6 +90,8 @@ class WebView(QWebView):
         self._cur_url = None
         self.cur_url = QUrl()
         self.progress = 0
+        self.registry = objreg.ObjectRegistry()
+        objreg.register('webview', self, registry=self.registry)
         page = webpage.BrowserPage(self)
         self.setPage(page)
         self.hintmanager = hints.HintManager(self)