Bug 1827604 - Special-case the apostrophe characters in text-transform:capitalize heuristics. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D175248

dom/base/nsLineBreaker.cpp

@@ -68,9 +68,7 @@ static void SetupCapitalization(const char16_t* aWord, uint32_t aLength,
       case GeneralCategory::Line_Separator:
       case GeneralCategory::Paragraph_Separator:
       case GeneralCategory::Dash_Punctuation:
-      case GeneralCategory::Other_Punctuation:
       case GeneralCategory::Initial_Punctuation:
-      case GeneralCategory::Final_Punctuation:
         /* These punctuation categories are excluded, for examples like
          *   "what colo[u]r" -> "What Colo[u]r?" (rather than "What Colo[U]R?")
          * and
@@ -81,6 +79,19 @@ static void SetupCapitalization(const char16_t* aWord, uint32_t aLength,
          */
         capitalizeNextChar = true;
         break;
+      case GeneralCategory::Final_Punctuation:
+        /* Special-case: exclude Unicode single-close-quote/apostrophe,
+           for examples like "Lowe’s" etc. */
+        if (ch != 0x2019) {
+          capitalizeNextChar = true;
+        }
+        break;
+      case GeneralCategory::Other_Punctuation:
+        /* Special-case: exclude ASCII apostrophe, for "Lowe's" etc. */
+        if (ch != '\'') {
+          capitalizeNextChar = true;
+        }
+        break;
       default:
         break;
     }

layout/reftests/text-transform/capitalize-9-ref.html

@@ -7,3 +7,5 @@ Snake_case
 Kebab-Case
 Colo[u]r
 Pass/Fail
+Lowe's
+Black’s

layout/reftests/text-transform/capitalize-9.html

@@ -7,3 +7,5 @@ snake_case
 kebab-case
 colo[u]r
 pass/fail
+lowe's
+black’s