/*

 * Copyright (C) 2009 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef ThreadableLoader_h

#define ThreadableLoader_h

#include <wtf/Noncopyable.h>

#include <wtf/PassRefPtr.h>

#include <wtf/Vector.h>

namespace WebCore {

    class ResourceError;

    class ResourceRequest;

    class ResourceResponse;

    class ScriptExecutionContext;

    class ThreadableLoaderClient;

    enum StoredCredentials {

        AllowStoredCredentials,

        DoNotAllowStoredCredentials

    };

    enum CrossOriginRequestPolicy {

        DenyCrossOriginRequests,

        UseAccessControl,

        AllowCrossOriginRequests

    };

    struct ThreadableLoaderOptions {

        ThreadableLoaderOptions() : sendLoadCallbacks(false), sniffContent(false), allowCredentials(false), forcePreflight(false), crossOriginRequestPolicy(DenyCrossOriginRequests) { }

        bool sendLoadCallbacks;

        bool sniffContent;

        bool allowCredentials;  // Whether HTTP credentials and cookies are sent with the request.

        bool forcePreflight;  // If AccessControl is used, whether to force a preflight.

        CrossOriginRequestPolicy crossOriginRequestPolicy;

    };

    // Useful for doing loader operations from any thread (not threadsafe, 

    // just able to run on threads other than the main thread).

    class ThreadableLoader : public Noncopyable {

    public:

        static void loadResourceSynchronously(ScriptExecutionContext*, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);

        static PassRefPtr<ThreadableLoader> create(ScriptExecutionContext*, ThreadableLoaderClient*, const ResourceRequest&, const ThreadableLoaderOptions&);

        virtual void cancel() = 0;

        void ref() { refThreadableLoader(); }

        void deref() { derefThreadableLoader(); }

    protected:

        virtual ~ThreadableLoader() { }

        virtual void refThreadableLoader() = 0;

        virtual void derefThreadableLoader() = 0;

    };

} // namespace WebCore

#endif // ThreadableLoader_h