Add analytics

Author: kean

WordPress/Classes/Utility/Analytics/WPAnalyticsEvent.swift

@@ -116,6 +116,7 @@ import Foundation
     case readerCommentTextCopied
     case readerPostContextMenuButtonTapped
     case readerAddSiteToFavoritesTapped
+    case readerButtonScrollToTopTapped
 
     // Stats - Empty Stats nudges
     case statsPublicizeNudgeShown
@@ -816,6 +817,8 @@ import Foundation
             return "reader_post_context_menu_button_tapped"
         case .readerAddSiteToFavoritesTapped:
             return "reader_add_site_to_favorites_tapped"
+        case .readerButtonScrollToTopTapped:
+            return "reader_button_scroll_to_top_tapped"
 
         // Stats - Empty Stats nudges
         case .statsPublicizeNudgeShown:

WordPress/Classes/ViewRelated/Reader/Controllers/ReaderStreamViewController.swift

@@ -1670,7 +1670,7 @@ extension ReaderStreamViewController: UITableViewDelegate, JPScrollViewDelegate
         layoutEmptyStateView()
         processJetpackBannerVisibility(scrollView)
         titleView.updateAlpha(in: scrollView)
-        buttonScrollToTop.setButtonHidden(scrollView.contentOffset.y < bounds.height / 3, animated: true)
+        buttonScrollToTop.setButtonHidden(scrollView.contentOffset.y < view.bounds.height / 3, animated: true)
     }
 }
 

WordPress/Classes/ViewRelated/Reader/ReaderButtonScrollToTop.swift

@@ -14,6 +14,7 @@ final class ReaderButtonScrollToTop: UIButton {
 
         return ReaderButtonScrollToTop(configuration: configuration, primaryAction: .init { _ in
             closure()
+            WPAnalytics.track(.readerButtonScrollToTopTapped)
         })
     }