| /* |
| Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) |
| Copyright (C) 2001 Dirk Mueller <mueller@kde.org> |
| Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public License |
| along with this library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| |
| This class provides all functionality needed for loading images, style sheets and html |
| pages from the web. It has a memory cache for these objects. |
| */ |
| |
| #pragma once |
| |
| #include "CachedResourceClient.h" |
| #include <wtf/HashCountedSet.h> |
| #include <wtf/Vector.h> |
| |
| namespace WebCore { |
| |
| // Call this "walker" instead of iterator so people won't expect Qt or STL-style iterator interface. |
| // Just keep calling next() on this. It's safe from deletions of items. |
| template<typename T> |
| class CachedResourceClientWalker { |
| public: |
| CachedResourceClientWalker(const HashCountedSet<CachedResourceClient*>& clientSet) |
| : m_clientSet(clientSet) |
| , m_clientVector(clientSet.size()) |
| { |
| size_t clientIndex = 0; |
| for (const auto& client : clientSet) |
| m_clientVector[clientIndex++] = client.key; |
| } |
| |
| T* next() |
| { |
| size_t size = m_clientVector.size(); |
| while (m_index < size) { |
| CachedResourceClient* next = m_clientVector[m_index++]; |
| if (m_clientSet.contains(next)) { |
| RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(T::expectedType() == CachedResourceClient::expectedType() || next->resourceClientType() == T::expectedType()); |
| return static_cast<T*>(next); |
| } |
| } |
| return nullptr; |
| } |
| private: |
| const HashCountedSet<CachedResourceClient*>& m_clientSet; |
| Vector<CachedResourceClient*> m_clientVector; |
| size_t m_index { 0 }; |
| }; |
| |
| } // namespace WebCore |