Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/editing/CompositeEditCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 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 794 matching lines @@
 
 void CompositeEditCommand::deleteInsignificantTextDownstream(const Position& pos)
 {
     Position end = VisiblePosition(pos, VP_DEFAULT_AFFINITY).next().deepEquivalent().downstream();
     deleteInsignificantText(pos, end);
 }
 
 PassRefPtr<Node> CompositeEditCommand::appendBlockPlaceholder(PassRefPtr<Element> container)
 {
     if (!container)
-        return 0;
+        return nullptr;
 
     document().updateLayoutIgnorePendingStylesheets();
 
     // Should assert isRenderBlockFlow || isInlineFlow when deletion improves. See 4244964.
     ASSERT(container->renderer());
 
     RefPtr<Node> placeholder = createBlockPlaceholderElement(document());
     appendNode(placeholder, container);
     return placeholder.release();
 }
 
 PassRefPtr<Node> CompositeEditCommand::insertBlockPlaceholder(const Position& pos)
 {
     if (pos.isNull())
-        return 0;
+        return nullptr;
 
     // Should assert isRenderBlockFlow || isInlineFlow when deletion improves. See 4244964.
     ASSERT(pos.deprecatedNode()->renderer());
 
     RefPtr<Node> placeholder = createBlockPlaceholderElement(document());
     insertNodeAt(placeholder, pos);
     return placeholder.release();
 }
 
 PassRefPtr<Node> CompositeEditCommand::addBlockPlaceholderIfNeeded(Element* container)
 {
     if (!container)
-        return 0;
+        return nullptr;
 
     document().updateLayoutIgnorePendingStylesheets();
 
     RenderObject* renderer = container->renderer();
     if (!renderer || !renderer->isRenderBlockFlow())
-        return 0;
+        return nullptr;
 
     // append the placeholder to make sure it follows
     // any unrendered blocks
     RenderBlock* block = toRenderBlock(renderer);
     if (block->height() == 0 || (block->isListItem() && block->isEmpty()))
         return appendBlockPlaceholder(container);
 
-    return 0;
+    return nullptr;
 }
 
 // Assumes that the position is at a placeholder and does the removal without much checking.
 void CompositeEditCommand::removePlaceholderAt(const Position& p)
 {
     ASSERT(lineBreakExistsAtPosition(p));
 
     // We are certain that the position is at a line break, but it may be a br or a preserved newline.
     if (p.anchorNode()->hasTagName(brTag)) {
         removeNode(p.anchorNode());
         return;
     }
 
     deleteTextFromNode(toText(p.anchorNode()), p.offsetInContainerNode(), 1);
 }
 
 PassRefPtr<Node> CompositeEditCommand::insertNewDefaultParagraphElementAt(const Position& position)
 {
     RefPtr<Element> paragraphElement = createDefaultParagraphElement(document());
     paragraphElement->appendChild(createBreakElement(document()));
     insertNodeAt(paragraphElement, position);
     return paragraphElement.release();
 }
 
 // If the paragraph is not entirely within it's own block, create one and move the paragraph into
 // it, and return that block.  Otherwise return 0.
 PassRefPtr<Node> CompositeEditCommand::moveParagraphContentsToNewBlockIfNecessary(const Position& pos)
 {
     if (pos.isNull())
-        return 0;
+        return nullptr;
 
     document().updateLayoutIgnorePendingStylesheets();
 
     // It's strange that this function is responsible for verifying that pos has not been invalidated
     // by an earlier call to this function.  The caller, applyBlockStyle, should do this.
     VisiblePosition visiblePos(pos, VP_DEFAULT_AFFINITY);
     VisiblePosition visibleParagraphStart(startOfParagraph(visiblePos));
     VisiblePosition visibleParagraphEnd = endOfParagraph(visiblePos);
     VisiblePosition next = visibleParagraphEnd.next();
     VisiblePosition visibleEnd = next.isNotNull() ? next : visibleParagraphEnd;
 
     Position upstreamStart = visibleParagraphStart.deepEquivalent().upstream();
     Position upstreamEnd = visibleEnd.deepEquivalent().upstream();
 
     // If there are no VisiblePositions in the same block as pos then
     // upstreamStart will be outside the paragraph
     if (comparePositions(pos, upstreamStart) < 0)
-        return 0;
+        return nullptr;
 
     // Perform some checks to see if we need to perform work in this function.
     if (isBlock(upstreamStart.deprecatedNode())) {
         // If the block is the root editable element, always move content to a new block,
         // since it is illegal to modify attributes on the root editable element for editing.
         if (upstreamStart.deprecatedNode() == editableRootForPosition(upstreamStart)) {
             // If the block is the root editable element and it contains no visible content, create a new
             // block but don't try and move content into it, since there's nothing for moveParagraphs to move.
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(upstreamStart.deprecatedNode()->renderer()))
                 return insertNewDefaultParagraphElementAt(upstreamStart);
         } else if (isBlock(upstreamEnd.deprecatedNode())) {
             if (!upstreamEnd.deprecatedNode()->isDescendantOf(upstreamStart.deprecatedNode())) {
                 // If the paragraph end is a descendant of paragraph start, then we need to run
                 // the rest of this function. If not, we can bail here.
-                return 0;
+                return nullptr;
             }
         } else if (enclosingBlock(upstreamEnd.deprecatedNode()) != upstreamStart.deprecatedNode()) {
             // The visibleEnd.  It must be an ancestor of the paragraph start.
             // We can bail as we have a full block to work with.
             ASSERT(upstreamStart.deprecatedNode()->isDescendantOf(enclosingBlock(upstreamEnd.deprecatedNode())));
-            return 0;
+            return nullptr;
         } else if (isEndOfEditableOrNonEditableContent(visibleEnd)) {
             // At the end of the editable region. We can bail here as well.
-            return 0;
+            return nullptr;
         }
     }
 
     RefPtr<Node> newBlock = insertNewDefaultParagraphElementAt(upstreamStart);
 
     bool endWasBr = visibleParagraphEnd.deepEquivalent().deprecatedNode()->hasTagName(brTag);
 
     moveParagraphs(visibleParagraphStart, visibleParagraphEnd, VisiblePosition(firstPositionInNode(newBlock.get())));
 
     if (newBlock->lastChild() && newBlock->lastChild()->hasTagName(brTag) && !endWasBr)
@@ skipping 230 matching lines @@
     Position end = endOfParagraphToMove.deepEquivalent().upstream();
 
     // start and end can't be used directly to create a Range; they are "editing positions"
     Position startRangeCompliant = start.parentAnchoredEquivalent();
     Position endRangeCompliant = end.parentAnchoredEquivalent();
     RefPtr<Range> range = Range::create(document(), startRangeCompliant.deprecatedNode(), startRangeCompliant.deprecatedEditingOffset(), endRangeCompliant.deprecatedNode(), endRangeCompliant.deprecatedEditingOffset());
 
     // FIXME: This is an inefficient way to preserve style on nodes in the paragraph to move. It
     // shouldn't matter though, since moved paragraphs will usually be quite small.
     RefPtr<DocumentFragment> fragment = startOfParagraphToMove != endOfParagraphToMove ?
-        createFragmentFromMarkup(document(), createMarkup(range.get(), 0, DoNotAnnotateForInterchange, true, DoNotResolveURLs, constrainingAncestor), "") : 0;
+        createFragmentFromMarkup(document(), createMarkup(range.get(), 0, DoNotAnnotateForInterchange, true, DoNotResolveURLs, constrainingAncestor), "") : nullptr;
 
     // A non-empty paragraph's style is moved when we copy and move it.  We don't move
     // anything if we're given an empty paragraph, but an empty paragraph can have style
     // too, <div><b><br></b></div> for example.  Save it so that we can preserve it later.
     RefPtr<EditingStyle> styleInEmptyParagraph;
     if (startOfParagraphToMove == endOfParagraphToMove && preserveStyle) {
         styleInEmptyParagraph = EditingStyle::create(startOfParagraphToMove.deepEquivalent());
         styleInEmptyParagraph->mergeTypingStyle(&document());
         // The moved paragraph should assume the block style of the destination.
         styleInEmptyParagraph->removeBlockProperties();
@@ skipping 66 matching lines @@
     style->mergeTypingStyle(&document());
 
     RefPtr<ContainerNode> listNode = emptyListItem->parentNode();
     // FIXME: Can't we do something better when the immediate parent wasn't a list node?
     if (!listNode
         || (!listNode->hasTagName(ulTag) && !listNode->hasTagName(olTag))
         || !listNode->rendererIsEditable()
         || listNode == emptyListItem->rootEditableElement())
         return false;
 
-    RefPtr<Element> newBlock = 0;
+    RefPtr<Element> newBlock = nullptr;
     if (ContainerNode* blockEnclosingList = listNode->parentNode()) {
         if (blockEnclosingList->hasTagName(liTag)) { // listNode is inside another list item
             if (visiblePositionAfterNode(blockEnclosingList) == visiblePositionAfterNode(listNode.get())) {
                 // If listNode appears at the end of the outer list item, then move listNode outside of this list item
                 // e.g. <ul><li>hello <ul><li><br></li></ul> </li></ul> should become <ul><li>hello</li> <ul><li><br></li></ul> </ul> after this section
                 // If listNode does NOT appear at the end, then we should consider it as a regular paragraph.
                 // e.g. <ul><li> <ul><li><br></li></ul> hello</li></ul> should become <ul><li> <div><br></div> hello</li></ul> at the end
                 splitElement(toElement(blockEnclosingList), listNode);
                 removeNodePreservingChildren(listNode->parentNode());
                 newBlock = createListItemElement(document());
@@ skipping 176 matching lines @@
     return node.release();
 }
 
 PassRefPtr<Element> createBlockPlaceholderElement(Document& document)
 {
     RefPtr<Element> breakNode = document.createElement(brTag, false);
     return breakNode.release();
 }
 
 } // namespace WebCore