username highlighting (#1502)

Classes/Systems/Autocomplete/AutocompleteController.swift

@@ -66,7 +66,7 @@ MessageAutocompleteControllerDelegate {
             prefix: messageAutocompleteController.selection?.prefix,
             indexPath: indexPath
             ) {
-            messageAutocompleteController.accept(autocomplete: accepted + " ", keepPrefix: false)
+            messageAutocompleteController.accept(autocomplete: accepted, keepPrefix: false)
         }
     }
 
@@ -79,6 +79,10 @@ MessageAutocompleteControllerDelegate {
     func didChangeStore(autocomplete: IssueCommentAutocomplete) {
         for prefix in autocomplete.prefixes {
             messageAutocompleteController.register(prefix: prefix)
+
+            if let attributes = autocomplete.highlightAttributes(prefix: prefix) {
+                messageAutocompleteController.registerAutocomplete(prefix: prefix, attributes: attributes)
+            }
         }
         messageAutocompleteController.tableView.reloadData()
     }

Classes/Systems/Autocomplete/AutocompleteType.swift

@@ -20,4 +20,6 @@ protocol AutocompleteType {
 
     func accept(index: Int) -> String?
 
+    var highlightAttributes: [NSAttributedStringKey: Any]? { get }
+
 }

Classes/Systems/Autocomplete/EmojiAutocomplete.swift

@@ -57,4 +57,6 @@ final class EmojiAutocomplete: AutocompleteType {
         return results[index].emoji
     }
 
+    var highlightAttributes: [NSAttributedStringKey : Any]? { return nil }
+
 }

Classes/Systems/Autocomplete/IssueCommentAutocomplete.swift

@@ -46,6 +46,10 @@ final class IssueCommentAutocomplete {
         return map.map { $0.key }
     }
 
+    func highlightAttributes(prefix: String) -> [NSAttributedStringKey: Any]? {
+        return map[prefix]?.highlightAttributes
+    }
+
     func resultCount(prefix: String?) -> Int {
         guard let prefix = prefix, let autocomplete = map[prefix] else { return 0 }
         return autocomplete.resultsCount

Classes/Systems/Autocomplete/UserAutocomplete.swift

@@ -63,4 +63,12 @@ final class UserAutocomplete: AutocompleteType {
         return prefix + results[index].login
     }
 
+    var highlightAttributes: [NSAttributedStringKey : Any]? {
+        return [
+            .font: Styles.Text.body.preferredFont,
+            .foregroundColor: Styles.Colors.Blue.medium.color,
+            .backgroundColor: Styles.Colors.Blue.medium.color.withAlphaComponent(0.1),
+        ]
+    }
+
 }