Templatize expandSelectionToRespectUserSelectAll in SelectionController

Source/core/editing/SelectionController.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  * Copyright (C) 2015 Google 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
@@ skipping 60 matching lines @@
 }
 
 static inline bool dispatchSelectStart(Node* node)
 {
     if (!node || !node->layoutObject())
         return true;
 
     return node->dispatchEvent(Event::createCancelableBubble(EventTypeNames::selectstart));
 }
 
+template <typename Strategy>
+VisibleSelection expandSelectionToRespectUserSelectAllAlgorithm(Node* targetNode, const VisibleSelection& selection)
+{
+    using PositionType = typename Strategy::PositionType;
+
+    Node* rootUserSelectAll = PositionType::rootUserSelectAllForNode(targetNode);
+    if (!rootUserSelectAll)
+        return selection;
+
+    VisibleSelection newSelection(selection);
+    newSelection.setBase(PositionType::beforeNode(rootUserSelectAll).upstream(CanCrossEditingBoundary));
+    newSelection.setExtent(PositionType::afterNode(rootUserSelectAll).downstream(CanCrossEditingBoundary));
+
+    return newSelection;
+}
+
 static VisibleSelection expandSelectionToRespectUserSelectAll(Node* targetNode, const VisibleSelection& selection)
 {
-    Node* rootUserSelectAll = Position::rootUserSelectAllForNode(targetNode);
-    if (!rootUserSelectAll)
-        return selection;
-
-    VisibleSelection newSelection(selection);
-    newSelection.setBase(positionBeforeNode(rootUserSelectAll).upstream(CanCrossEditingBoundary));
-    newSelection.setExtent(positionAfterNode(rootUserSelectAll).downstream(CanCrossEditingBoundary));
-
-    return newSelection;
+    return expandSelectionToRespectUserSelectAllAlgorithm<VisibleSelection::InDOMTree>(targetNode, selection);
 }
 
 bool SelectionController::updateSelectionForMouseDownDispatchingSelectStart(Node* targetNode, const VisibleSelection& selection, TextGranularity granularity)
 {
     if (Position::nodeIsUserSelectNone(targetNode))
         return false;
 
     if (!dispatchSelectStart(targetNode))
         return false;
 
@@ skipping 455 matching lines @@
 {
     return m_mouseDownMayStartSelect;
 }
 
 bool SelectionController::mouseDownWasSingleClickInSelection() const
 {
     return m_mouseDownWasSingleClickInSelection;
 }
 
 } // namespace blink