Add per-domain user stylesheet support

qutebrowser/browser/shared.py

@@ -273,10 +273,10 @@ def get_tab(win_id, target):
     return tabbed_browser.tabopen(url=None, background=bg_tab)
 
 
-def get_user_stylesheet():
+def get_user_stylesheet(url=None):
     """Get the combined user-stylesheet."""
     css = ''
-    stylesheets = config.val.content.user_stylesheets
+    stylesheets = config.instance.get("content.user_stylesheets", url)
 
     for filename in stylesheets:
         with open(filename, 'r', encoding='utf-8') as f:

qutebrowser/browser/webengine/webenginetab.py

@@ -18,7 +18,6 @@
 # along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
 
 """Wrapper over a QWebEngineView."""
-
 import math
 import functools
 import sys
@@ -796,11 +795,12 @@ class _WebEngineScripts(QObject):
     def _on_config_changed(self, option):
         if option in ['scrolling.bar', 'content.user_stylesheets']:
             self._init_stylesheet()
-            self._update_stylesheet()
+            url = self.url(requested=True)
+            self._update_stylesheet(url=url)
 
-    def _update_stylesheet(self):
+    def _update_stylesheet(self, url=None):
         """Update the custom stylesheet in existing tabs."""
-        css = shared.get_user_stylesheet()
+        css = shared.get_user_stylesheet(url=url)
         code = javascript.assemble('stylesheet', 'set_css', css)
         self._tab.run_js_async(code)
 
@@ -863,8 +863,9 @@ class _WebEngineScripts(QObject):
         Partially inspired by QupZilla:
         https://github.com/QupZilla/qupzilla/blob/v2.0/src/lib/app/mainapplication.cpp#L1063-L1101
         """
+
         self._remove_early_js('stylesheet')
-        css = shared.get_user_stylesheet()
+        css = shared.get_user_stylesheet(url=None)
         js_code = javascript.wrap_global(
             'stylesheet',
             utils.read_file('javascript/stylesheet.js'),
@@ -1225,6 +1226,9 @@ class WebEngineTab(browsertab.AbstractTab):
             # the old icon is still displayed.
             self.icon_changed.emit(QIcon())
 
+        url = self.url(requested=True)
+        self._update_stylesheet(url)
+
     @pyqtSlot(QUrl)
     def _on_predicted_navigation(self, url):
         """If we know we're going to visit an URL soon, change the settings.

qutebrowser/config/configdata.yml

@@ -689,6 +689,7 @@ content.user_stylesheets:
     valtype: File
     none_ok: True
   default: []
+  supports_pattern: true
   desc: List of user stylesheet filenames to use.
 
 content.webgl: