Move lineDirectionPointForBlockDirectionNavigationOf() to FrameSelection.cpp

Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1162 matching lines @@
     }
 
     if (userTriggered == UserTriggered)
         m_granularity = CharacterGranularity;
 
     m_selection.setIsDirectional(shouldAlwaysUseDirectionalSelection(m_frame) || alter == AlterationExtend);
 
     return true;
 }
 
+// Abs x/y position of the caret ignoring transforms.
+// TODO(yosin) navigation with transforms should be smarter.
+static int lineDirectionPointForBlockDirectionNavigationOf(const VisiblePosition& visiblePosition)
+{
+    if (visiblePosition.isNull())
+        return 0;
+
+    LayoutObject* layoutObject;
+    LayoutRect localRect = localCaretRectOfPosition(visiblePosition.toPositionWithAffinity(), layoutObject);
+    if (localRect.isEmpty() || !layoutObject)
+        return 0;
+
+    // This ignores transforms on purpose, for now. Vertical navigation is done
+    // without consulting transforms, so that 'up' in transformed text is 'up'
+    // relative to the text, not absolute 'up'.
+    FloatPoint caretPoint = layoutObject->localToAbsolute(FloatPoint(localRect.location()));
+    LayoutObject* containingBlock = layoutObject->containingBlock();
+    if (!containingBlock)
+        containingBlock = layoutObject; // Just use ourselves to determine the writing mode if we have no containing block.
+    return containingBlock->isHorizontalWritingMode() ? caretPoint.x() : caretPoint.y();
+}
+
 LayoutUnit FrameSelection::lineDirectionPointForBlockDirectionNavigation(EPositionType type)
 {
     LayoutUnit x = 0;
 
     if (isNone())
         return x;
 
     Position pos;
     switch (type) {
     case START:
@@ skipping 876 matching lines @@
 
 void showTree(const blink::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil) FrameSelection.\n");
 }
 
 #endif