word_search_result: add romanization getters

lib/models/word_search/word_search_result.dart

@@ -6,6 +6,7 @@ import 'package:jadb/models/word_search/word_search_ruby.dart';
 import 'package:jadb/models/word_search/word_search_sense.dart';
 import 'package:jadb/models/word_search/word_search_sources.dart';
 import 'package:jadb/search/word_search/word_search.dart';
+import 'package:jadb/util/romaji_transliteration.dart';
 
 /// A class representing a single dictionary entry from a word search.
 class WordSearchResult {
@@ -44,6 +45,35 @@ class WordSearchResult {
   /// the original searchword.
   List<WordSearchMatchSpan>? matchSpans;
 
+  /// All contents of [japanese], transliterated to romaji
+  List<String> get romaji => japanese
+      .map((word) => transliterateKanaToLatin(word.furigana ?? word.base))
+      .toList();
+
+  /// All contents of [japanase], where the furigana has either been transliterated to romaji, or
+  /// contains the furigana transliteration of [WordSearchRuby.base].
+  List<WordSearchRuby> get romajiRubys => japanese
+      .map(
+        (word) => WordSearchRuby(
+          base: word.base,
+          furigana: word.furigana != null
+              ? transliterateKanaToLatin(word.furigana!)
+              : transliterateKanaToLatin(word.base),
+        ),
+      )
+      .toList();
+
+  /// The same list of spans as [matchSpans], but the positions have been adjusted for romaji conversion
+  ///
+  /// This is mostly useful in conjunction with [romajiRubys].
+  List<WordSearchMatchSpan>? get romajiMatchSpans {
+    if (matchSpans == null) {
+      return null;
+    }
+
+    throw UnimplementedError('Not yet implemented');
+  }
+
   WordSearchResult({
     required this.score,
     required this.entryId,
@@ -163,7 +193,7 @@ class WordSearchResult {
     this.matchSpans = matchSpans;
   }
 
-  String _formatJapaneseWord(WordSearchRuby word) =>
+  static String _formatJapaneseWord(WordSearchRuby word) =>
       word.furigana == null ? word.base : '${word.base} (${word.furigana})';
 
   @override