Dark mode implemented

SBrowser/Web Process Bundle Bridge/SBRProcessBundleBridge.m

@@ -13,18 +13,23 @@
 #import <WebKit/_WKRemoteObjectInterface.h>
 #import <WebKit/_WKRemoteObjectRegistry.h>
 #import <WebKit/_WKProcessPoolConfiguration.h>
+#import <WebKit/_WKUserStyleSheet.h>
 
 #import <WebKit/WKProcessPoolPrivate.h>
 #import <WebKit/WKWebViewPrivate.h>
 #import <WebKit/WKWebViewConfigurationPrivate.h>
+#import <WebKit/WKUserContentControllerPrivate.h>
 
 @interface SBRProcessBundleBridge () <SBRWebProcessDelegate>
 
 @end
 
 @implementation SBRProcessBundleBridge {
-    WKWebView *_webView;
+    WKWebView              *_webView;
+    WKWebViewConfiguration *_webViewConfiguration;
     id<SBRWebProcessProxy> _webProcessProxy;
+    
+    _WKUserStyleSheet     *_darkModeStyleSheet;
 }
 
 - (WKWebView *)webView
@@ -58,6 +63,7 @@
         [[webView _remoteObjectRegistry] registerExportedObject:self interface:delegateInterface];
         
         _webView = webView;
+        _webViewConfiguration = configuration;
     }
     
     return _webView;
@@ -90,4 +96,23 @@
     [_webProcessProxy setAllScriptsAllowed:allowAllScripts];
 }
 
+- (void)setDarkModeEnabled:(BOOL)darkModeEnabled
+{
+    _darkModeEnabled = darkModeEnabled;
+    
+    WKUserContentController *userContentController = [_webViewConfiguration userContentController];
+    
+    if (darkModeEnabled) {
+        if (!_darkModeStyleSheet) {
+            NSURL *styleSheetURL = [[NSBundle mainBundle] URLForResource:@"darkmode" withExtension:@"css"];
+            NSString *styleSheetSource = [NSString stringWithContentsOfURL:styleSheetURL encoding:NSUTF8StringEncoding error:nil];
+            _darkModeStyleSheet = [[_WKUserStyleSheet alloc] initWithSource:styleSheetSource forMainFrameOnly:NO];
+        }
+        
+        [userContentController _addUserStyleSheet:_darkModeStyleSheet];
+    } else if (_darkModeStyleSheet) {
+        [userContentController _removeUserStyleSheet:_darkModeStyleSheet];
+    }
+}
+
 @end