[LayoutNG] Implement 'text-align-last'

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 343 matching lines @@
 
   // Now mark the line boxes as being constructed.
   LastLineBox()->SetConstructed();
 
   // Return the last line.
   return LastRootBox();
 }
 
 ETextAlign LayoutBlockFlow::TextAlignmentForLine(
     bool ends_with_soft_break) const {
-  ETextAlign alignment = Style()->GetTextAlign();
-  if (ends_with_soft_break)
-    return alignment;
-
-  ETextAlignLast alignment_last = Style()->TextAlignLast();
-  switch (alignment_last) {
-    case ETextAlignLast::kStart:
-      return ETextAlign::kStart;
-    case ETextAlignLast::kEnd:
-      return ETextAlign::kEnd;
-    case ETextAlignLast::kLeft:
-      return ETextAlign::kLeft;
-    case ETextAlignLast::kRight:
-      return ETextAlign::kRight;
-    case ETextAlignLast::kCenter:
-      return ETextAlign::kCenter;
-    case ETextAlignLast::kJustify:
-      return ETextAlign::kJustify;
-    case ETextAlignLast::kAuto:
-      if (alignment == ETextAlign::kJustify)
-        return ETextAlign::kStart;
-      return alignment;
-  }
-
-  return alignment;
+  return Style()->GetTextAlign(!ends_with_soft_break);
 }
 
 static bool TextAlignmentNeedsTrailingSpace(ETextAlign text_align,
                                             const ComputedStyle& style) {
   switch (text_align) {
     case ETextAlign::kLeft:
     case ETextAlign::kWebkitLeft:
       return false;
     case ETextAlign::kRight:
     case ETextAlign::kWebkitRight:
@@ skipping 2255 matching lines @@
 
 bool LayoutBlockFlow::PaintedOutputOfObjectHasNoEffectRegardlessOfSize() const {
   // LayoutBlockFlow is in charge of paint invalidation of the first line.
   if (FirstLineBox())
     return false;
 
   return LayoutBlock::PaintedOutputOfObjectHasNoEffectRegardlessOfSize();
 }
 
 }  // namespace blink