Consider text alignment and direction when computing the left offset for horizontal writing modes.

Source/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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
@@ skipping 48 matching lines @@
 class RenderFlowThread;
 class RenderGeometryMap;
 class RenderLayer;
 class RenderLayerModelObject;
 class RenderNamedFlowThread;
 class RenderSVGResourceContainer;
 class RenderTable;
 class RenderTheme;
 class RenderView;
 class ResourceLoadPriorityOptimizer;
+class RootInlineBox;
 class TransformState;
 
 struct PaintInfo;
 
 enum CursorDirective {
     SetCursorBasedOnStyle,
     SetCursor,
     DoNotSetCursor
 };
 
@@ skipping 700 matching lines @@
     }
 
     // Used only by Element::pseudoStyleCacheIsInvalid to get a first line style based off of a
     // given new style, without accessing the cache.
     PassRefPtr<RenderStyle> uncachedFirstLineStyle(RenderStyle*) const;
 
     // Anonymous blocks that are part of of a continuation chain will return their inline continuation's outline style instead.
     // This is typically only relevant when repainting.
     virtual RenderStyle* outlineStyleForRepaint() const { return style(); }
 
+    // Return LEFT, RIGHT, CENTER or JUSTIFY considering text alignment and direction.
+    // If a specific RootInlineBox is specified, it will be used to calculate the direction to be considered,
+    // otherwise the default direction for the associated style will be used.
+    ETextAlign simplifiedTextAlign(const ETextAlign&, const RootInlineBox* = 0) const;
+
     virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const;
 
     void getTextDecorationColors(unsigned decorations, Color& underline, Color& overline, Color& linethrough, bool quirksMode = false, bool firstlineStyle = false);
 
     // Return the RenderLayerModelObject in the container chain which is responsible for painting this object, or 0
     // if painting is root-relative. This is the container that should be passed to the 'forRepaint'
     // methods.
     RenderLayerModelObject* containerForRepaint() const;
     // Actually do the repaint of rect r for this object which has been computed in the coordinate space
     // of repaintContainer. If repaintContainer is 0, repaint via the view.
@@ skipping 609 matching lines @@
 void showTree(const WebCore::RenderObject*);
 void showLineTree(const WebCore::RenderObject*);
 void showRenderTree(const WebCore::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2);
 
 #endif
 
 #endif // RenderObject_h