--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/loader.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,118 @@
+/*
+    Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
+    Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
+    Copyright (C) 2004, 2006, 2007, 2008 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.
+*/
+
+#ifndef loader_h
+#define loader_h
+
+#include "AtomicString.h"
+#include "AtomicStringImpl.h"
+#include "FrameLoaderTypes.h"
+#include "PlatformString.h"
+#include "SubresourceLoaderClient.h"
+#include "Timer.h"
+#include <wtf/Deque.h>
+#include <wtf/HashMap.h>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+
+    class CachedResource;
+    class DocLoader;
+    class KURL;
+    class Request;
+
+    class Loader : public Noncopyable {
+    public:
+        Loader();
+        ~Loader();
+
+        void load(DocLoader*, CachedResource*, bool incremental = true, SecurityCheckPolicy = DoSecurityCheck, bool sendResourceLoadCallbacks = true);
+
+        void cancelRequests(DocLoader*);
+        
+        enum Priority { VeryLow, Low, Medium, High };
+        void servePendingRequests(Priority minimumPriority = VeryLow);
+
+        bool isSuspendingPendingRequests() { return m_isSuspendingPendingRequests; }
+        void suspendPendingRequests();
+        void resumePendingRequests();
+        
+        void nonCacheRequestInFlight(const KURL&);
+        void nonCacheRequestComplete(const KURL&);
+
+    private:
+        Priority determinePriority(const CachedResource*) const;
+        void scheduleServePendingRequests();
+        
+        void requestTimerFired(Timer<Loader>*);
+
+        class Host : public RefCounted<Host>, private SubresourceLoaderClient {
+        public:
+            static PassRefPtr<Host> create(const AtomicString& name, unsigned maxRequestsInFlight) 
+            {
+                return adoptRef(new Host(name, maxRequestsInFlight));
+            }
+            ~Host();
+            
+            const AtomicString& name() const { return m_name; }
+            void addRequest(Request*, Priority);
+            void nonCacheRequestInFlight();
+            void nonCacheRequestComplete();
+            void servePendingRequests(Priority minimumPriority = VeryLow);
+            void cancelRequests(DocLoader*);
+            bool hasRequests() const;
+
+            bool processingResource() const { return m_numResourcesProcessing != 0 || m_nonCachedRequestsInFlight !=0; }
+
+        private:
+            Host(const AtomicString&, unsigned);
+
+            virtual void didReceiveResponse(SubresourceLoader*, const ResourceResponse&);
+            virtual void didReceiveData(SubresourceLoader*, const char*, int);
+            virtual void didReceiveCachedMetadata(SubresourceLoader*, const char*, int);
+            virtual void didFinishLoading(SubresourceLoader*);
+            virtual void didFail(SubresourceLoader*, const ResourceError&);
+            
+            typedef Deque<Request*> RequestQueue;
+            void servePendingRequests(RequestQueue& requestsPending, bool& serveLowerPriority);
+            void didFail(SubresourceLoader*, bool cancelled = false);
+            void cancelPendingRequests(RequestQueue& requestsPending, DocLoader*);
+            
+            RequestQueue m_requestsPending[High + 1];
+            typedef HashMap<RefPtr<SubresourceLoader>, Request*> RequestMap;
+            RequestMap m_requestsLoading;
+            const AtomicString m_name;
+            const int m_maxRequestsInFlight;
+            int m_numResourcesProcessing;
+            int m_nonCachedRequestsInFlight;
+        };
+        typedef HashMap<AtomicStringImpl*, RefPtr<Host> > HostMap;
+        HostMap m_hosts;
+        RefPtr<Host> m_nonHTTPProtocolHost;
+        
+        Timer<Loader> m_requestTimer;
+
+        bool m_isSuspendingPendingRequests;
+    };
+
+}
+
+#endif