content/base/src/nsCommentNode.cpp
author David Anderson <danderson@mozilla.com>
Mon, 30 Jul 2012 13:15:39 -0700
changeset 106616 08187a7ea8974548382f5d7775df8171a4ec6449
parent 106547 7aa128dbd1a9e5b9272376aa9a1f4aa23afd8787
parent 100847 b5c4b792f3f2a047e3517472d72842a76afb77cd
child 106719 c4f83d9d8243f3f853a5356188164a5fddee2b5a
permissions -rw-r--r--
Merge from mozilla-central.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * Implementations of DOM Core's nsIDOMComment node.
 */

#include "nsIDOMComment.h"
#include "nsGenericDOMDataNode.h"

#include "nsCOMPtr.h"
#include "nsGenericElement.h" // DOMCI_NODE_DATA

class nsCommentNode : public nsGenericDOMDataNode,
                      public nsIDOMComment
{
public:
  nsCommentNode(already_AddRefed<nsINodeInfo> aNodeInfo);
  virtual ~nsCommentNode();

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMNode
  NS_FORWARD_NSIDOMNODE(nsGenericDOMDataNode::)

  // nsIDOMCharacterData
  NS_FORWARD_NSIDOMCHARACTERDATA(nsGenericDOMDataNode::)

  // nsIDOMComment
  // Empty interface

  // nsINode
  virtual bool IsNodeOfType(PRUint32 aFlags) const;

  virtual nsGenericDOMDataNode* CloneDataNode(nsINodeInfo *aNodeInfo,
                                              bool aCloneText) const;

  virtual nsXPCClassInfo* GetClassInfo();

  virtual nsIDOMNode* AsDOMNode() { return this; }
#ifdef DEBUG
  virtual void List(FILE* out, PRInt32 aIndent) const;
  virtual void DumpContent(FILE* out = stdout, PRInt32 aIndent = 0,
                           bool aDumpAll = true) const
  {
    return;
  }
#endif
};

nsresult
NS_NewCommentNode(nsIContent** aInstancePtrResult,
                  nsNodeInfoManager *aNodeInfoManager)
{
  NS_PRECONDITION(aNodeInfoManager, "Missing nodeinfo manager");

  *aInstancePtrResult = nullptr;

  nsCOMPtr<nsINodeInfo> ni = aNodeInfoManager->GetCommentNodeInfo();
  NS_ENSURE_TRUE(ni, NS_ERROR_OUT_OF_MEMORY);

  nsCommentNode *instance = new nsCommentNode(ni.forget());
  if (!instance) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  NS_ADDREF(*aInstancePtrResult = instance);

  return NS_OK;
}

nsCommentNode::nsCommentNode(already_AddRefed<nsINodeInfo> aNodeInfo)
  : nsGenericDOMDataNode(aNodeInfo)
{
  NS_ABORT_IF_FALSE(mNodeInfo->NodeType() == nsIDOMNode::COMMENT_NODE,
                    "Bad NodeType in aNodeInfo");
}

nsCommentNode::~nsCommentNode()
{
}

DOMCI_NODE_DATA(Comment, nsCommentNode)

// QueryInterface implementation for nsCommentNode
NS_INTERFACE_TABLE_HEAD(nsCommentNode)
  NS_NODE_INTERFACE_TABLE3(nsCommentNode, nsIDOMNode, nsIDOMCharacterData,
                           nsIDOMComment)
  NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(Comment)
NS_INTERFACE_MAP_END_INHERITING(nsGenericDOMDataNode)


NS_IMPL_ADDREF_INHERITED(nsCommentNode, nsGenericDOMDataNode)
NS_IMPL_RELEASE_INHERITED(nsCommentNode, nsGenericDOMDataNode)


bool
nsCommentNode::IsNodeOfType(PRUint32 aFlags) const
{
  return !(aFlags & ~(eCONTENT | eCOMMENT | eDATA_NODE));
}

nsGenericDOMDataNode*
nsCommentNode::CloneDataNode(nsINodeInfo *aNodeInfo, bool aCloneText) const
{
  nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
  nsCommentNode *it = new nsCommentNode(ni.forget());
  if (it && aCloneText) {
    it->mText = mText;
  }

  return it;
}

#ifdef DEBUG
void
nsCommentNode::List(FILE* out, PRInt32 aIndent) const
{
  PRInt32 indx;
  for (indx = aIndent; --indx >= 0; ) fputs("  ", out);

  fprintf(out, "Comment@%p refcount=%d<!--", (void*)this, mRefCnt.get());

  nsAutoString tmp;
  ToCString(tmp, 0, mText.GetLength());
  fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);

  fputs("-->\n", out);
}
#endif