/*
 * 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.
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 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef WebDataSource_h
#define WebDataSource_h

#include "../platform/WebCommon.h"
#include "WebNavigationType.h"
#include "WebTextDirection.h"

namespace blink {

class WebApplicationCacheHost;
class WebString;
class WebURL;
class WebURLRequest;
class WebURLResponse;
template <typename T> class WebVector;

class WebDataSource {
public:
    class ExtraData {
    public:
        virtual ~ExtraData() { }
    };

    // Returns the original request that resulted in this datasource.
    virtual const WebURLRequest& originalRequest() const = 0;

    // Returns the request corresponding to this datasource.  It may
    // include additional request headers added by WebKit that were not
    // present in the original request.  This request may also correspond
    // to a location specified by a redirect that was followed.
    virtual const WebURLRequest& request() const = 0;

    // Returns the response associated with this datasource.
    virtual const WebURLResponse& response() const = 0;

    // When this datasource was created as a result of WebFrame::loadData,
    // there may be an associated unreachableURL.
    virtual bool hasUnreachableURL() const = 0;
    virtual WebURL unreachableURL() const = 0;

    // Allows the embedder to append redirects to the chain as a navigation
    // is starting, in case it is being transferred from another process.
    virtual void appendRedirect(const WebURL&) = 0;

    // Returns all redirects that occurred (both client and server) before
    // at last committing the current page.  This will contain one entry
    // for each intermediate URL, and one entry for the last URL (so if
    // there are no redirects, it will contain exactly the current URL, and
    // if there is one redirect, it will contain the source and destination
    // URL).
    virtual void redirectChain(WebVector<WebURL>&) const = 0;

    // Returns whether the navigation associated with this datasource is a
    // client redirect.
    virtual bool isClientRedirect() const = 0;

    // Returns whether the navigation associated with this datasource should
    // replace the current history item.
    virtual bool replacesCurrentHistoryItem() const = 0;

    // The type of navigation that triggered the creation of this datasource.
    virtual WebNavigationType navigationType() const = 0;

    // The time in seconds (since the epoch) of the event that triggered
    // the creation of this datasource.  Returns 0 if unknown.
    virtual double triggeringEventTime() const = 0;

    // Extra data associated with this datasource.  If non-null, the extra
    // data pointer will be deleted when the datasource is destroyed.
    // Setting the extra data pointer will cause any existing non-null
    // extra data pointer to be deleted.
    virtual ExtraData* extraData() const = 0;
    virtual void setExtraData(ExtraData*) = 0;

    // Sets the navigation start time for this datasource. Ordinarily,
    // navigation start is determined in WebCore. But, in some situations,
    // the embedder might have a better value and can override it here. This
    // should be called before WebFrameClient::didCommitProvisionalLoad.
    // Calling it later may confuse users, because JavaScript may have run and
    // the user may have already recorded the original value.
    virtual void setNavigationStartTime(double) = 0;

protected:
    ~WebDataSource() { }
};

} // namespace blink

#endif