| /* |
| 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_CLIENT_WALKER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_CLIENT_WALKER_H_ |
| |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/resource_client.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| |
| namespace blink { |
| |
| // 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 ResourceClientWalker { |
| STACK_ALLOCATED(); |
| |
| public: |
| explicit ResourceClientWalker( |
| const HeapHashCountedSet<WeakMember<ResourceClient>>& set) |
| : client_set_(set) { |
| CopyToVector(client_set_, client_vector_); |
| } |
| |
| T* Next() { |
| wtf_size_t size = client_vector_.size(); |
| while (index_ < size) { |
| ResourceClient* next = client_vector_[index_++]; |
| DCHECK(next); |
| if (client_set_.Contains(next)) { |
| return static_cast<T*>(next); |
| } |
| } |
| return nullptr; |
| } |
| |
| private: |
| const HeapHashCountedSet<WeakMember<ResourceClient>>& client_set_; |
| HeapVector<Member<ResourceClient>> client_vector_; |
| wtf_size_t index_ = 0; |
| }; |
| |
| } // namespace blink |
| |
| #endif |