ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/EditingUtilities.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 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 1114 matching lines @@
 bool isNodeRendered(const Node& node)
 {
     LayoutObject* layoutObject = node.layoutObject();
     if (!layoutObject)
         return false;
 
     return layoutObject->style()->visibility() == VISIBLE;
 }
 
 // return first preceding DOM position rendered at a different location, or "this"
-static Position previousCharacterPosition(const Position& position, EAffinity affinity)
+static Position previousCharacterPosition(const Position& position, TextAffinity affinity)
 {
     if (position.isNull())
         return Position();
 
     Element* fromRootEditableElement = position.anchorNode()->rootEditableElement();
 
     bool atStartOfLine = isStartOfLine(VisiblePosition(position, affinity));
     bool rendered = position.isCandidate();
 
     Position currentPos = position;
     while (!currentPos.atStartOfTree()) {
         currentPos = currentPos.previous();
 
         if (currentPos.anchorNode()->rootEditableElement() != fromRootEditableElement)
             return position;
 
         if (atStartOfLine || !rendered) {
             if (currentPos.isCandidate())
                 return currentPos;
         } else if (rendersInDifferentPosition(position, currentPos)) {
             return currentPos;
         }
     }
 
     return position;
 }
 
 // This assumes that it starts in editable content.
-Position leadingWhitespacePosition(const Position& position, EAffinity affinity, WhitespacePositionOption option)
+Position leadingWhitespacePosition(const Position& position, TextAffinity affinity, WhitespacePositionOption option)
 {
     ASSERT(isEditablePosition(position, ContentIsEditable, DoNotUpdateStyle));
     if (position.isNull())
         return Position();
 
     if (isHTMLBRElement(*position.upstream().anchorNode()))
         return Position();
 
     Position prev = previousCharacterPosition(position, affinity);
     if (prev != position && inSameContainingBlockFlowElement(prev.anchorNode(), position.anchorNode()) && prev.anchorNode()->isTextNode()) {
         String string = toText(prev.anchorNode())->data();
         UChar previousCharacter = string[prev.computeOffsetInContainerNode()];
         bool isSpace = option == ConsiderNonCollapsibleWhitespace ? (isSpaceOrNewline(previousCharacter) || previousCharacter == noBreakSpaceCharacter) : isCollapsibleWhitespace(previousCharacter);
         if (isSpace && isEditablePosition(prev))
             return prev;
     }
 
     return Position();
 }
 
 // This assumes that it starts in editable content.
-Position trailingWhitespacePosition(const Position& position, EAffinity, WhitespacePositionOption option)
+Position trailingWhitespacePosition(const Position& position, TextAffinity, WhitespacePositionOption option)
 {
     ASSERT(isEditablePosition(position, ContentIsEditable, DoNotUpdateStyle));
     if (position.isNull())
         return Position();
 
     VisiblePosition visiblePosition(position);
     UChar characterAfterVisiblePosition = visiblePosition.characterAfter();
     bool isSpace = option == ConsiderNonCollapsibleWhitespace ? (isSpaceOrNewline(characterAfterVisiblePosition) || characterAfterVisiblePosition == noBreakSpaceCharacter) : isCollapsibleWhitespace(characterAfterVisiblePosition);
     // The space must not be in another paragraph and it must be editable.
     if (isSpace && !isEndOfParagraph(visiblePosition) && visiblePosition.next(CannotCrossEditingBoundary).isNotNull())
@@ skipping 237 matching lines @@
     // if the selection starts just before a paragraph break, skip over it
     if (isEndOfParagraph(visiblePosition))
         return visiblePosition.next().deepEquivalent().downstream();
 
     // otherwise, make sure to be at the start of the first selected node,
     // instead of possibly at the end of the last node before the selection
     return visiblePosition.deepEquivalent().downstream();
 }
 
 } // namespace blink