Introduce EphemeralRange::nodes() helper to traverse over a range.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/EphemeralRange.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
@@ skipping 101 matching lines @@
 }
 
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::isCollapsed() const
 {
     DCHECK(isValid());
     return m_startPosition == m_endPosition;
 }
 
 template <typename Strategy>
+typename EphemeralRangeTemplate<Strategy>::RangeTraversal
+EphemeralRangeTemplate<Strategy>::nodes() const
+{
+    return RangeTraversal(m_startPosition.nodeAsRangeFirstNode(), m_endPosition.nodeAsRangePastLastNode());
+}
+
+template <typename Strategy>
 EphemeralRangeTemplate<Strategy> EphemeralRangeTemplate<Strategy>::rangeOfContents(const Node& node)
 {
     return EphemeralRangeTemplate<Strategy>(PositionTemplate<Strategy>::firstPositionInNode(&const_cast<Node&>(node)), PositionTemplate<Strategy>::lastPositionInNode(&const_cast<Node&>(node)));
 }
 
 #if DCHECK_IS_ON()
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::isValid() const
 {
     return m_startPosition.isNull() || m_domTreeVersion == m_startPosition.document()->domTreeVersion();
@@ skipping 10 matching lines @@
 {
     if (range.isNull())
         return nullptr;
     return Range::create(range.document(), range.startPosition(), range.endPosition());
 }
 
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingInFlatTreeStrategy>;
 
 } // namespace blink