Avoid duplicate functions/code in core/editing: computeDistance

third_party/WebKit/Source/core/editing/InputMethodController.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 525 matching lines @@
     return;
 
   // An open typing command that disagrees about current selection would cause
   // issues with typing later on.
   TypingCommand::closeTyping(m_frame);
 
   // No DOM update after 'compositionend'.
   dispatchCompositionEndEvent(frame(), emptyString);
 }
 
-// If current position is at grapheme boundary, return 0; otherwise, return the
-// distance to its nearest left grapheme boundary.
-static size_t computeDistanceToLeftGraphemeBoundary(const Position& position) {
-  const Position& adjustedPosition = previousPositionOf(
-      nextPositionOf(position, PositionMoveType::GraphemeCluster),
-      PositionMoveType::GraphemeCluster);
-  DCHECK_EQ(position.anchorNode(), adjustedPosition.anchorNode());
-  DCHECK_GE(position.computeOffsetInContainerNode(),
-            adjustedPosition.computeOffsetInContainerNode());
-  return static_cast<size_t>(position.computeOffsetInContainerNode() -
-                             adjustedPosition.computeOffsetInContainerNode());
-}
-
-// If current position is at grapheme boundary, return 0; otherwise, return the
-// distance to its nearest right grapheme boundary.
-static size_t computeDistanceToRightGraphemeBoundary(const Position& position) {
-  const Position& adjustedPosition = nextPositionOf(
-      previousPositionOf(position, PositionMoveType::GraphemeCluster),
-      PositionMoveType::GraphemeCluster);
-  DCHECK_EQ(position.anchorNode(), adjustedPosition.anchorNode());
-  DCHECK_GE(adjustedPosition.computeOffsetInContainerNode(),
-            position.computeOffsetInContainerNode());
-  return static_cast<size_t>(adjustedPosition.computeOffsetInContainerNode() -
-                             position.computeOffsetInContainerNode());
-}
-
 void InputMethodController::setComposition(
     const String& text,
     const Vector<CompositionUnderline>& underlines,
     int selectionStart,
     int selectionEnd) {
   Editor::RevealSelectionScope revealSelectionScope(&editor());
 
   // Updates styles before setting selection for composition to prevent
   // inserting the previous composition text into text nodes oddly.
   // See https://bugs.webkit.org/show_bug.cgi?id=46868
@@ skipping 660 matching lines @@
   finishComposingText(KeepSelection);
 }
 
 DEFINE_TRACE(InputMethodController) {
   visitor->trace(m_frame);
   visitor->trace(m_compositionRange);
   SynchronousMutationObserver::trace(visitor);
 }
 
 }  // namespace blink