Tagger: Saka-key like keyboard navigation link tagging

App/Web Process Bundle Bridge/SBRProcessBundleBridge.m

@@ -32,6 +32,8 @@
     
     _WKUserStyleSheet     *_darkModeStyleSheet;
     WKUserScript          *_readabilityScript;
+    
+    NSArray<WKUserScript *> *_userScripts;
 }
 
 - (void)tearDown
@@ -91,6 +93,12 @@
         
         _webViewConfiguration = webViewConfiguration;
         
+        // User scripts
+        WKUserContentController *userContentController = [_webViewConfiguration userContentController];
+        for (WKUserScript *script in [self _userScripts]) {
+            [userContentController addUserScript:script];
+        }
+        
         // Instantiate web view
         WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:webViewConfiguration];
         
@@ -106,6 +114,25 @@
     return self;
 }
 
+- (WKUserScript *)_loadScriptForResource:(NSString *)resourceName withExtension:(NSString *)extension
+{
+    NSURL *url = [[NSBundle mainBundle] URLForResource:resourceName withExtension:extension];
+    NSString *source = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
+    
+    return [[WKUserScript alloc] initWithSource:source injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
+}
+
+- (NSArray<WKUserScript *> *)_userScripts
+{
+    if (!_userScripts) {
+        _userScripts = @[
+            [self _loadScriptForResource:@"Tagger" withExtension:@"js"],
+        ];
+    }
+    
+    return _userScripts;
+}
+
 #pragma mark <SBRWebProcessDelegate>
 
 - (void)webProcessDidConnect
@@ -168,10 +195,7 @@
     WKUserContentController *userContentController = [_webViewConfiguration userContentController];
     
     if (!_readabilityScript) {
-        NSURL *readabilityJSURL = [[NSBundle mainBundle] URLForResource:@"Readability" withExtension:@"js"];
-        NSString *readabilityJSSource = [NSString stringWithContentsOfURL:readabilityJSURL encoding:NSUTF8StringEncoding error:nil];
-        
-        _readabilityScript = [[WKUserScript alloc] initWithSource:readabilityJSSource injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
+        _readabilityScript = [self _loadScriptForResource:@"Readability" withExtension:@"js"];
     }
     
     [userContentController _addUserScriptImmediately:_readabilityScript];