/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Handle links and embedded content that are not fetched from the network

*

*/

#ifndef BRCTLLINKRESOLVER_H

#define BRCTLLINKRESOLVER_H

//  INCLUDES

#include <e32std.h>

#include <e32base.h>

/**

* The browser guesses the expected content type from 

* the HTML element in which the content was defined.

*/

enum TBrCtlLoadContentType

    {

    ELoadContentTypeAny, ///< The content type is unknown

    /**

    * The content is one of the following:

    * HTML, XHTML, WML

    */

    ELoadContentTypeMarkup,

    ELoadContentTypeImage, ///< The content is an image

    ELoadContentTypeCss, ///< The content is a cascading style sheet

    ELoadContentTypeJavascript, ///< The content is Javascript

    ELoadContentTypePlugin, ///< The content is data for a Netscape plug-in

    /**

    * The content is data for SoundStart. SoundStart is an attribute 

    * that is added to an anchor <a> tag to play audio when an anchor 

    * is in focus or selected.

    */

    ELoadContentTypeSound

    };

// FORWARD DECLARATIONS

class MBrCtlLinkContent;

/**

* The MBrCtlLinkResolver class provides the content of an embedded link 

* or the content of a load request that was initiated by the user. 

* This class is used when the host application stores markup text or 

* other information in a private store. For example, this class could be 

* used for e-mail applications.

*

* Usage:

*

* @code

*  #include <BrCtlLinkResolver.h>

*

*  

* @see S60 Platform: Browser Control API Developer's Guide Version 2.0

* @lib BrowserEngine.lib

* @file BrCtlLinkResolver.h

* @endcode     *

*/

class MBrCtlLinkResolver

    {

    public: // New functions

      /**

      * Browser plug-in calls this method when embedded link is found. 

        * Used with ECapabilityClientResolveEmbeddedURL

        * @since 2.8

      * @param aEmbeddedUrl The url of the embedded content

      * @param aCurrentUrl The url of the current page

      * @param aLoadContentType Type of the embedded content

        * Values: One of the following:

        * ELoadContentTypeAny, ELoadContentTypeMarkup, ELoadContentTypeImage

        * ELoadContentTypeCss, ELoadContentTypeJavascript, ELoadContentTypePlug-in

      * @param aEmbeddedLinkContent a callback interface to return the embedded content

      * @return ETrue if the host application resolves the link.  

        * EFalse if the host application does not resolve the link. 

        * @attention The host application makes this request by setting 

        * the ECapabilityClientResolveEmbeddedURL function.

      */

        virtual TBool ResolveEmbeddedLinkL(const TDesC& aEmbeddedUrl,

                                       const TDesC& aCurrentUrl,

                                         TBrCtlLoadContentType aLoadContentType, 

                                         MBrCtlLinkContent& aEmbeddedLinkContent) = 0; 

      /**

      * Browser plug-in calls this method when the user requests to load content via selecting a link, or any other way. Used with ECapabilityClientNotifyURL 

        * @since 2.8

      * @param aUrl The requested url

      * @param aCurrentUrl The url of the current page

      * @param aBrCtlLinkContent a callback interface to return the embedded content

      * @return ETrue if the host application resolves the link.

        * EFalse if the host application does not resolve the link. 

        * @attention The host application requests that the browser plug-in call 

        * this function to load new content by setting the ECapabilityClientNotifyURL function.

      */

        virtual TBool ResolveLinkL(const TDesC& aUrl, const TDesC& aCurrentUrl,

                                   MBrCtlLinkContent& aBrCtlLinkContent) = 0;

    /**

    * Cancel all outstanding resolving operations

        * @since 2.8

      * @return void

      */

        virtual void CancelAll() = 0;

    };

/**

* The MBrCtlLinkContent class is an interface that loads the resolved content. 

*

* Usage:

*

* @code

*  #include <BrCtlLinkResolver.h>

*

*  

* @see S60 Platform: Browser Control API Developer's Guide Version 2.0

* @lib BrowserEngine.lib

* @file BrCtlLinkResolver.h

* @endcode     *

*/

class MBrCtlLinkContent

    {

    public: // New functions

        /**

      * Resolver calls this method when content is resolved.

      * @param aContentType The content type of the response

      * @param aCharset The charset of the response. May be empty in case of image

      * @param aContentBuf content data. Ownership is not transfered

      * @return void

      */

        virtual void HandleResolveComplete(const TDesC& aContentType,

                                           const TDesC& aCharset,

                                           const HBufC8* aContentBuf) = 0;

    /**

      * This method is called if there is some error while resolving the content

      * @param aError system wide error code.

      * @return void

      */

        virtual void HandleResolveError(TInt aError) = 0;

    };

#endif      // BRCTLLINKRESOLVER_H

// End of File