Apply first-line transform-text style

third_party/WebKit/Source/core/layout/LayoutText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1396 matching lines @@
         break;
     case UPPERCASE:
         text = text.upper(style->locale());
         break;
     case LOWERCASE:
         text = text.lower(style->locale());
         break;
     }
 }
 
+void LayoutText::applyTextTransformFromTo(int from, int len, const ComputedStyle* style)
+{
+    if (!style)
+        return;
+
+    String textToCapitalize;
+    switch (style->textTransform()) {
+    case TTNONE:
+        break;
+    case CAPITALIZE:
+        textToCapitalize = m_text.substring(from, len);
+        makeCapitalized(&textToCapitalize, previousCharacter());
+        m_text.replace(from, len, textToCapitalize);

[rhogan, 2016/09/12 18:58:25]

A couple of things may have been the source of the crash in 644733. However I
haven't been able to recreate the crash so have just added a couple of defensive
measures here.

+        break;
+    case UPPERCASE:
+        m_text.replace(from, len, m_text.substring(from, len).upper(style->locale()));
+        break;
+    case LOWERCASE:
+        m_text.replace(from, len, m_text.substring(from, len).lower(style->locale()));
+        break;
+    }
+}
+
 void LayoutText::setTextInternal(PassRefPtr<StringImpl> text)
 {
     ASSERT(text);
     m_text = std::move(text);
 
     if (style()) {
         applyTextTransform(style(), m_text, previousCharacter());
 
         // We use the same characters here as for list markers.
         // See the listMarkerText function in LayoutListMarker.cpp.
@@ skipping 340 matching lines @@
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         paintInvalidator.invalidateDisplayItemClient(*box, invalidationReason);
         if (box->truncation() != cNoTruncation) {
             if (EllipsisBox* ellipsisBox = box->root().ellipsisBox())
                 paintInvalidator.invalidateDisplayItemClient(*ellipsisBox, invalidationReason);
         }
     }
 }
 
 } // namespace blink