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/*
 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  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. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 PolicyChecker_h
#define PolicyChecker_h

#include "FrameLoaderTypes.h"
#include "PlatformString.h"
#include "PolicyCallback.h"
#include "ResourceRequest.h"
#include <wtf/PassRefPtr.h>

namespace WebCore {

    class DocumentLoader;
    class FormState;
    class Frame;
    class NavigationAction;
    class ResourceError;
    class ResourceResponse;

    class PolicyChecker : public Noncopyable {
    public:
        PolicyChecker(Frame*);

        void checkNavigationPolicy(const ResourceRequest&, DocumentLoader*, PassRefPtr<FormState>, NavigationPolicyDecisionFunction, void* argument);
        void checkNavigationPolicy(const ResourceRequest&, NavigationPolicyDecisionFunction, void* argument);
        void checkNewWindowPolicy(const NavigationAction&, NewWindowPolicyDecisionFunction, const ResourceRequest&, PassRefPtr<FormState>, const String& frameName, void* argument);
        void checkContentPolicy(const String& MIMEType, ContentPolicyDecisionFunction, void* argument);

        // FIXME: These are different.  They could use better names.
        void cancelCheck();
        void stopCheck();

        void cannotShowMIMEType(const ResourceResponse&);

        FrameLoadType loadType() const { return m_loadType; }
        void setLoadType(FrameLoadType loadType) { m_loadType = loadType; }

        bool delegateIsDecidingNavigationPolicy() const { return m_delegateIsDecidingNavigationPolicy; }
        bool delegateIsHandlingUnimplementablePolicy() const { return m_delegateIsHandlingUnimplementablePolicy; }

        // FIXME: This function is a cheat.  Basically, this is just an asynchronouc callback
        // from the FrameLoaderClient, but this callback uses the policy types and so has to
        // live on this object.  In the long term, we should create a type for non-policy
        // callbacks from the FrameLoaderClient and remove this vestige.  I just don't have
        // the heart to hack on all the platforms to make that happen right now.
        void continueLoadAfterWillSubmitForm(PolicyAction);

    private:
        void continueAfterNavigationPolicy(PolicyAction);
        void continueAfterNewWindowPolicy(PolicyAction);
        void continueAfterContentPolicy(PolicyAction);

        void handleUnimplementablePolicy(const ResourceError&);

        Frame* m_frame;

        bool m_delegateIsDecidingNavigationPolicy;
        bool m_delegateIsHandlingUnimplementablePolicy;

        // This identifies the type of navigation action which prompted this load. Note 
        // that WebKit conveys this value as the WebActionNavigationTypeKey value
        // on navigation action delegate callbacks.
        FrameLoadType m_loadType;
        PolicyCallback m_callback;
    };

} // namespace WebCore

#endif // PolicyChecker_h