layout/inspector/inDOMUtils.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Thu, 22 Oct 2015 22:48:40 -0700
changeset 269446 588e410c0ddb76ce261c9c0bd344b1ad634fcb32
parent 234933 ac4464790ec4896a5188fa50cfc69ae0ffeddc08
permissions -rw-r--r--
Bug 1187784 (part 8) - Replace nsBaseHashtable::EnumerateRead() calls in layout/ with iterators. r=heycam. This fixes a type bug in CSSVariableDeclarations::MapRuleInfoInto(). The existing code passes aRuleData->mVariables.get(), which has type |CSSVariableDeclarations*|, into the |void*| parameter to EnumerateRead(). It then extracts that in EnumerateVariableForMapRuleInfoInto() via a cast to a different type, |nsDataHashtable<nsStringHashKey, nsString>*|. It's missing an intermediate access of CSSVariableDeclarations::mVariables. It's likely that this hasn't (seemingly) caused problems prior to now because mVariables is the only field in CSSVariableDeclarations, so mVariables->mVariables is at the same address as mVariables.

/* 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/. */

#ifndef __inDOMUtils_h__
#define __inDOMUtils_h__

#include "inIDOMUtils.h"

class nsRuleNode;
class nsStyleContext;
class nsIAtom;

namespace mozilla {
namespace dom {
class Element;
} // namespace dom
} // namespace mozilla

class inDOMUtils final : public inIDOMUtils
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_INIDOMUTILS

  inDOMUtils();

private:
  virtual ~inDOMUtils();

  // aStyleContext must be released by the caller once he's done with aRuleNode.
  static nsresult GetRuleNodeForElement(mozilla::dom::Element* aElement,
                                        nsIAtom* aPseudo,
                                        nsStyleContext** aStyleContext,
                                        nsRuleNode** aRuleNode);
};

// {0a499822-a287-4089-ad3f-9ffcd4f40263}
#define IN_DOMUTILS_CID \
  {0x0a499822, 0xa287, 0x4089, {0xad, 0x3f, 0x9f, 0xfc, 0xd4, 0xf4, 0x02, 0x63}}

#endif // __inDOMUtils_h__