gecko-dev/accessible/base/nsAccCache.h

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1.4 KiB
C++

/* -*- 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/. */
#ifndef _nsAccCache_H_
#define _nsAccCache_H_
#include "xpcAccessibleDocument.h"
////////////////////////////////////////////////////////////////////////////////
// Accessible cache utils
////////////////////////////////////////////////////////////////////////////////
/**
* Shutdown and removes the accessible from cache.
*/
template <class T>
static PLDHashOperator
ClearCacheEntry(const void* aKey, nsRefPtr<T>& aAccessible, void* aUserArg)
{
NS_ASSERTION(aAccessible, "Calling ClearCacheEntry with a nullptr pointer!");
if (aAccessible && !aAccessible->IsDefunct())
aAccessible->Shutdown();
return PL_DHASH_REMOVE;
}
template <class T>
static PLDHashOperator
UnbindCacheEntryFromDocument(const void* aKey, nsRefPtr<T>& aAccessible,
void* aUserArg)
{
MOZ_ASSERT(aAccessible && !aAccessible->IsDefunct());
aAccessible->Document()->UnbindFromDocument(aAccessible);
return PL_DHASH_REMOVE;
}
/**
* Clear the cache and shutdown the accessibles.
*/
template <class T>
static void
ClearCache(nsRefPtrHashtable<nsPtrHashKey<const void>, T>& aCache)
{
aCache.Enumerate(ClearCacheEntry<T>, nullptr);
}
#endif