Allow application to provide activity items

Author: mausibris

src/ios/SafariViewController.h

@@ -1,13 +1,22 @@
 #import <Cordova/CDVPlugin.h>
 #import <SafariServices/SafariServices.h>
 
+@protocol ActivityItemProvider
+
+- (NSArray<UIActivity *> *)safariViewController:(SFSafariViewController *)controller
+                            activityItemsForURL:(NSURL *)URL
+                                          title:(nullable NSString *)title;
+
+@end
+
 @interface SafariViewController : CDVPlugin <SFSafariViewControllerDelegate>
 
 @property (nonatomic, copy) NSString* callbackId;
 @property (nonatomic) bool animated;
+@property (nonatomic) id<ActivityItemProvider> activityItemProvider;
 
 - (void) isAvailable:(CDVInvokedUrlCommand*)command;
 - (void) show:(CDVInvokedUrlCommand*)command;
 - (void) hide:(CDVInvokedUrlCommand*)command;
 
-@end
+@end

src/ios/SafariViewController.m

@@ -143,4 +143,14 @@ - (void)safariViewController:(SFSafariViewController *)controller didCompleteIni
   }
 }
 
+- (NSArray<UIActivity *> *)safariViewController:(SFSafariViewController *)
+              controller activityItemsForURL:(NSURL *)URL
+              title:(nullable NSString *)title {
+
+    if(self.activityItemProvider)
+        return [self.activityItemProvider safariViewController:controller activityItemsForURL:URL title:title];
+    else
+        return nil;
+}
+
 @end