[gnome-shell] main: Get the theme resource name from sessionMode

[Florian Müllner <fmuellner src gnome org>]

commit 7345a6f2762d0876a57b49cf52fb5ecf125b21f2
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Mar 3 10:05:54 2020 +0100

    main: Get the theme resource name from sessionMode
    
    Along the lines of `styleSheetName`, a session mode may want to provide its
    own gresource file, so make this possible via a `themeResourceName` session
    mode parameter, defaulted to gnome-shell-theme.gresource
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1063

 js/ui/main.js        | 3 ++-
 js/ui/sessionMode.js | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/js/ui/main.js b/js/ui/main.js
index 05b30d5449..6b180bd9be 100644
--- a/js/ui/main.js
+++ b/js/ui/main.js
@@ -361,7 +361,8 @@ function reloadThemeResource() {
     if (_themeResource)
         _themeResource._unregister();
 
-    _themeResource = Gio.Resource.load('%s/gnome-shell-theme.gresource'.format(global.datadir));
+    _themeResource = Gio.Resource.load('%s/%s'.format(global.datadir,
+        sessionMode.themeResourceName));
     _themeResource._register();
 }
 
diff --git a/js/ui/sessionMode.js b/js/ui/sessionMode.js
index 1c52987708..e12fc2ef48 100644
--- a/js/ui/sessionMode.js
+++ b/js/ui/sessionMode.js
@@ -15,6 +15,7 @@ const _modes = {
     'restrictive': {
         parentMode: null,
         stylesheetName: 'gnome-shell.css',
+        themeResourceName: 'gnome-shell-theme.gresource',
         hasOverview: false,
         showCalendarEvents: false,
         allowSettings: false,