Add webkit to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 187 insertions, 0 deletions

diff --git a/webkit/pending/CachedResource.h b/webkit/pending/CachedResource.h
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+++ b/webkit/pending/CachedResource.h
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+/*
+    Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
+    Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
+    Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
+    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.
+*/
+
+#ifndef CachedResource_h
+#define CachedResource_h
+
+#include "PlatformString.h"
+#include "ResourceResponse.h"
+#include "SharedBuffer.h"
+#include <wtf/HashCountedSet.h>
+#include <wtf/Vector.h>
+#include <time.h>
+
+namespace WebCore {
+
+class Cache;
+class CachedResourceClient;
+class DocLoader;
+class Request;
+
+// A resource that is held in the cache. Classes who want to use this object should derive
+// from CachedResourceClient, to get the function calls in case the requested data has arrived.
+// This class also does the actual communication with the loader to obtain the resource from the network.
+class CachedResource {
+    friend class Cache;
+    
+public:
+    enum Type {
+        ImageResource,
+        CSSStyleSheet,
+        Script,
+        FontResource
+#if ENABLE(XSLT)
+        , XSLStyleSheet
+#endif
+#if ENABLE(XBL)
+        , XBL
+#endif
+    };
+
+    enum Status {
+        NotCached,    // this URL is not cached
+        Unknown,      // let cache decide what to do with it
+        New,          // inserting new item
+        Pending,      // only partially loaded
+        Cached        // regular case
+    };
+
+    CachedResource(const String& url, Type, bool forCache = true, bool sendResourceLoadCallbacks = false);
+    virtual ~CachedResource();
+
+    virtual void setEncoding(const String&) { }
+    virtual String encoding() const { return String(); }
+    virtual void data(PassRefPtr<SharedBuffer> data, bool allDataReceived) = 0;
+    virtual void error() = 0;
+
+    const String &url() const { return m_url; }
+    Type type() const { return m_type; }
+
+    virtual void ref(CachedResourceClient*);
+    void deref(CachedResourceClient*);
+    bool referenced() const { return !m_clients.isEmpty(); }
+    virtual void allReferencesRemoved() {};
+
+    unsigned count() const { return m_clients.size(); }
+
+    Status status() const { return m_status; }
+
+    unsigned size() const { return encodedSize() + decodedSize(); }
+    unsigned encodedSize() const { return m_encodedSize; }
+    unsigned decodedSize() const { return m_decodedSize; }
+    
+    bool isLoaded() const { return !m_loading; }
+    void setLoading(bool b) { m_loading = b; }
+
+    virtual bool isImage() const { return false; }
+
+    unsigned accessCount() const { return m_accessCount; }
+    void increaseAccessCount() { m_accessCount++; }
+
+    // Computes the status of an object after loading.  
+    // Updates the expire date on the cache entry file
+    void finish();
+
+    // Called by the cache if the object has been removed from the cache
+    // while still being referenced. This means the object should delete itself
+    // if the number of clients observing it ever drops to 0.
+    void setInCache(bool b) { m_inCache = b; }
+    bool inCache() const { return m_inCache; }
+    
+    void setInLiveDecodedResourcesList(bool b) { m_inLiveDecodedResourcesList = b; }
+    bool inLiveDecodedResourcesList() { return m_inLiveDecodedResourcesList; }
+    
+    void setRequest(Request*);
+
+    void setResponse(const ResourceResponse& response) { m_response = response; }
+    const ResourceResponse& response() const { return m_response; }
+    
+    bool canDelete() const { return !referenced() && !m_request; }
+
+    bool isExpired() const;
+
+    virtual bool schedule() const { return false; }
+
+    // List of acceptable MIME types seperated by ",".
+    // A MIME type may contain a wildcard, e.g. "text/*".
+    String accept() const { return m_accept; }
+    void setAccept(const String& accept) { m_accept = accept; }
+
+    bool errorOccurred() const { return m_errorOccurred; }
+    bool treatAsLocal() const { return m_shouldTreatAsLocal; }
+    bool sendResourceLoadCallbacks() const { return m_sendResourceLoadCallbacks; }
+    
+    virtual void destroyDecodedData() {};
+
+    void setDocLoader(DocLoader* docLoader) { m_docLoader = docLoader; }
+    
+protected:
+    void setEncodedSize(unsigned);
+    void setDecodedSize(unsigned);
+    void didAccessDecodedData(double timeStamp);
+    
+    HashCountedSet<CachedResourceClient*> m_clients;
+
+    String m_url;
+    String m_accept;
+    Request* m_request;
+
+    ResourceResponse m_response;
+    RefPtr<SharedBuffer> m_data;
+
+    Type m_type;
+    Status m_status;
+
+    bool m_errorOccurred;
+
+private:
+    unsigned m_encodedSize;
+    unsigned m_decodedSize;
+    unsigned m_accessCount;
+    unsigned m_inLiveDecodedResourcesList;
+    double m_lastDecodedAccessTime; // Used as a "thrash guard" in the cache
+    
+    bool m_sendResourceLoadCallbacks;
+protected:
+    bool m_inCache;
+    bool m_loading;
+    bool m_expireDateChanged;
+#ifndef NDEBUG
+    bool m_deleted;
+    unsigned m_lruIndex;
+#endif
+
+private:
+    CachedResource* m_nextInAllResourcesList;
+    CachedResource* m_prevInAllResourcesList;
+    
+    CachedResource* m_nextInLiveResourcesList;
+    CachedResource* m_prevInLiveResourcesList;
+
+    bool m_shouldTreatAsLocal;
+
+    DocLoader* m_docLoader; // only non-0 for resources that are not in the cache
+};
+
+}
+
+#endif