fix: solara theming not respecting theme.js file

solara/lab/components/theming.py

@@ -1,4 +1,4 @@
-from typing import Callable, cast
+from typing import Callable, Dict, Union, cast
 
 import ipyvuetify.Themes
 from ipyvuetify.Themes import Theme
@@ -11,6 +11,15 @@
 ipyvuetify.Themes.theme = cast(ipyvuetify.Themes.Theme, theme)
 
 
+def _set_theme(themes: Union[Dict[str, Dict[str, str]], None]):
+    if themes is None:
+        return
+
+    for theme_type in themes.keys():
+        for k, v in themes[theme_type].items():
+            setattr(getattr(theme.themes, theme_type), k, v)
+
+
 @component_vue("theming.vue")
 def _ThemeToggle(
     theme_dark: str,

solara/server/app.py

@@ -369,10 +369,12 @@ def on_msg(msg):
             app = apps[app_name]
             context = kernel_context.get_current_context()
             dark = args.get("dark", False)
+            themes = args.get("themes", None)
             import ipyvuetify
 
-            from solara.lab import theme
+            from solara.lab.components.theming import _set_theme, theme
 
+            _set_theme(themes)
             # While this usually gets set from the frontend, in solara (server) we want to know this directly at the first
             # render. Also, using the same trait allows us to write code which works on all widgets platforms, instead
             # or using something different when running under solara server

solara/server/static/main-vuetify.js

@@ -230,7 +230,7 @@ async function solaraInit(mountId, appName) {
     if (kernelId && widgetModelId) {
         await widgetManager.fetchAll();
     } else {
-        widgetModelId = await widgetManager.run(appName, {path, dark: inDarkMode()});
+        widgetModelId = await widgetManager.run(appName, {path, dark: inDarkMode(), themes: vuetifyThemes});
     }
     await solaraMount(widgetManager, mountId || 'content', widgetModelId);
     skipReconnectedCheck = false;