/*

* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:  Message header HTML

*

*/

#include <s32strm.h>

#include <f32file.h>

#include <s32file.h>

#include <e32cmn.h>

#include <utf.h>

#include <StringLoader.h>

#include <AknsUtils.h>

#include <AknsSkinInstance.h>

#include <AknsConstants.h>

#include <FreestyleEmailUi.rsg>

#include <finditemengine.h>

#include "FreestyleMessageHeaderHTML.h"

#include "FreestyleEmailUiUtilities.h"

#include "ncsconstants.h"

_LIT8( KAttachementIconGeneral, "attachment.gif");

_LIT8( KFollowUpIconFileName, "follow_up.png");

_LIT8( KFollowUpCompleteIconFileName, "follow_up_complete.png");

_LIT8( KPriorityHighIconFileName, "todo_high_add.png");

_LIT8( KPriorityLowIconFileName, "todo_low_add.png");

_LIT8( KToTableName, "to_table");

_LIT8( KCcTableName, "cc_table");

_LIT8( KBccTableName, "bcc_table");

_LIT8( KAttachmentTableName, "attachment_table");

_LIT8( KFromTableName,"from_table");

_LIT8( KFromFieldName, "from_field");

_LIT8( KToFieldName, "to_field");

_LIT8( KCcFieldName, "cc_field");

_LIT8( KBccFieldName, "bcc_field");

_LIT8( KSentFieldName, "sent_field");

_LIT8( KSubjectFieldName, "subject_field");

_LIT8( KToImageName, "to_img");

_LIT8( KCcImageName, "cc_img");

_LIT8( KBccImageName, "bcc_img");

_LIT8( KAttachmentImageName, "attachment_img");

_LIT8( KFollowUpImageName, "follow_up_img");

_LIT8( KFollowUpCompleteImageName, "follow_up_complete_img");

_LIT8( KPriorityHighImageName, "todo_high_add_img");

_LIT8( KPriorityLowImageName, "todo_low_add_img");

_LIT8( KSpace8, " ");

_LIT8( KHTMLImgTagId, "<image id=\"" );

_LIT8( KHTMLImgTagSrcBefore, "\" border=\"0\" src=\"" );

_LIT8( KHTMLImgTagSrcAfter, "\">" );

_LIT8( KMetaHeader, "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n" );

_LIT8( KDisplayImagesLeftToRight,

_LIT8( KDisplayImagesRightToLeft,

_LIT8 ( KProtocolIdentifier, "://" );

const TInt KMaxEventLength( 256 );

const TInt KFreestyleMessageHeaderHTMLRightMarginInPx( 10 );

const TInt KFreestyleMessageHeaderHTMLMaxBufferSizeForWidth( 5 );

// Define this to allow theme colorin for the header

#undef __USE_THEME_COLOR_FOR_HEADER    

EXPORT_C CFreestyleMessageHeaderHTML* CFreestyleMessageHeaderHTML::NewL( CFSMailMessage& aMailMessage, 

                                                                         RWriteStream& aWriteStream,

                                                                         TInt aVisibleWidth,

                                                                         TInt aScrollPosition,

                                                                         const TBool aAutoLoadImages,

                                                                         const TBool aExpanded 

                                                                         )

    {

    CFreestyleMessageHeaderHTML* self = new (ELeave) CFreestyleMessageHeaderHTML( aMailMessage, aWriteStream, aVisibleWidth, aScrollPosition, aAutoLoadImages, aExpanded);

    self->ConstructL();

    return self;

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL( CFSMailMessage& aMailMessage, 

                                                    RWriteStream& aWriteStream, 

                                                    TInt aVisibleWidth,

                                                    TInt aScrollPosition,

                                                    const TBool aAutoLoadImages,

                                                    const TBool aExpanded )

    {

    CFreestyleMessageHeaderHTML* headerHtml = CFreestyleMessageHeaderHTML::NewL( aMailMessage, aWriteStream, aVisibleWidth, aScrollPosition, aAutoLoadImages, aExpanded);

    CleanupStack::PushL( headerHtml );

    headerHtml->ExportL();

    CleanupStack::PopAndDestroy( headerHtml );

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL( CFSMailMessage& aMailMessage, 

                                                    RFile& aFile, 

                                                    TInt aVisibleWidth,

                                                    TInt aScrollPosition,

                                                    const TBool aAutoLoadImages,

                                                    const TBool aExpanded )

    {

    RFileWriteStream fwstream;

    fwstream.Attach( aFile, 0 );

    CleanupClosePushL( fwstream );

    CFreestyleMessageHeaderHTML* headerHtml = CFreestyleMessageHeaderHTML::NewL( aMailMessage, fwstream, aVisibleWidth, aScrollPosition, aAutoLoadImages, aExpanded );

    CleanupStack::PushL( headerHtml );

    headerHtml->ExportL();

    CleanupStack::PopAndDestroy( headerHtml );

    CleanupStack::PopAndDestroy( &fwstream );

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL( CFSMailMessage& aMailMessage, 

                                                    RFs& aFs, 

                                                    const TPath& aFilePath, 

                                                    TInt aVisibleWidth,

                                                    TInt aScrollPosition,

                                                    const TBool aAutoLoadImages,

                                                    const TBool aExpanded )

    {

    RFileWriteStream fwstream;

    User::LeaveIfError( fwstream.Replace( aFs, aFilePath, EFileStreamText | EFileWrite) );

    CleanupClosePushL( fwstream );

    CFreestyleMessageHeaderHTML* headerHtml = CFreestyleMessageHeaderHTML::NewL( aMailMessage, fwstream, aVisibleWidth, aScrollPosition, aAutoLoadImages, aExpanded);

    CleanupStack::PushL( headerHtml );

    headerHtml->ExportL();

    CleanupStack::PopAndDestroy( headerHtml );

    CleanupStack::PopAndDestroy( &fwstream );    

    }

CFreestyleMessageHeaderHTML::~CFreestyleMessageHeaderHTML()

    {

    iAttachments.ResetAndDestroy();

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL() const

    {

    HTMLStartL();

    ExportHTMLHeaderL();

    ExportHTMLBodyL();

    HTMLEndL();

    }

CFreestyleMessageHeaderHTML::CFreestyleMessageHeaderHTML( CFSMailMessage& aMailMessage,  

                                                          RWriteStream& aWriteStream,

                                                          TInt aVisibleWidth,

                                                          TInt aScrollPosition,

                                                          const TBool aAutoLoadImages,

                                                          const TBool aExpanded )

    : iMailMessage( aMailMessage ),

    iWriteStream( aWriteStream ),

    iVisibleWidth( aVisibleWidth - KFreestyleMessageHeaderHTMLRightMarginInPx ),

    iScrollPosition( aScrollPosition ),

    iAutoLoadImages( aAutoLoadImages ),

    iMirrorLayout( AknLayoutUtils::LayoutMirrored() ),

    iExpanded( aExpanded  )

    {

    }

void CFreestyleMessageHeaderHTML::ConstructL()

    {

    iMailMessage.AttachmentListL( iAttachments );

    }

void CFreestyleMessageHeaderHTML::HTMLStartL() const

    {

    iWriteStream.WriteL(_L8("<html"));

    if ( iMirrorLayout )

        {

        iWriteStream.WriteL(_L8(" dir=\"rtl\""));

        }

    else

        {

        iWriteStream.WriteL(_L8(" dir=\"ltr\""));

        }

    iWriteStream.WriteL(_L8(" xmlns=\"http://www.w3.org/1999/xhtml\">\n"));

    iWriteStream.CommitL();

    }

void CFreestyleMessageHeaderHTML::HTMLEndL() const

    {

    iWriteStream.WriteL(_L8("</html>\n"));

    iWriteStream.CommitL();

    }

void CFreestyleMessageHeaderHTML::ExportHTMLHeaderL() const

    {

    HTMLHeaderStartL();

    HTMLMetaL();

    iWriteStream.WriteL( _L8("<title>Email Header</title>\n") );

    AddJavascriptL();

    AddStyleSheetL();

    HTMLHeaderEndL();

    }

void CFreestyleMessageHeaderHTML::HTMLHeaderStartL() const

    {

    iWriteStream.WriteL(_L8("<head>"));

    iWriteStream.CommitL();

    }

void CFreestyleMessageHeaderHTML::HTMLMetaL() const

    {

    // Html file representing email header fields, is always constructed locally

    // in the phone, and it is always of charset UTF-8 irrespective of what

    // the email html-format body is

    iWriteStream.WriteL( KMetaHeader );

    iWriteStream.CommitL();

    }

void CFreestyleMessageHeaderHTML::HTMLHeaderEndL() const

    {

    iWriteStream.WriteL(_L8("</head>\n"));

    iWriteStream.CommitL();

    }

void CFreestyleMessageHeaderHTML::ExportHTMLBodyL() const

    {

    HTMLBodyStartL();

    ExportAttachmentsL();

    ExportDisplayImagesTableL();

    HTMLBodyEndL();

    }

void CFreestyleMessageHeaderHTML::ExportDisplayImagesTableL() const

    {

    if (!iAutoLoadImages)

        {

        _LIT8(KDescription, "");

        //_LIT8(KButton, "Display images");

        HBufC8* description = KDescription().AllocLC(); //HeadingTextLC(R_FREESTYLE_EMAIL_UI_IMAGES_ARE_NOT_DISPLAYED);

        HBufC8* button = HeadingTextLC(R_FREESTYLE_EMAIL_UI_DISPLAY_IMAGES); // KButton().AllocLC();

        HBufC8* formatBuffer = NULL;

        if (iMirrorLayout)

            {

            formatBuffer = HBufC8::NewLC(KDisplayImagesRightToLeft().Length() + description->Length() + button->Length() + 8);

            formatBuffer->Des().Format(

                    KDisplayImagesRightToLeft(),

                    iAutoLoadImages,

                    iVisibleWidth,

                    button,

                    description);

            }

        else

            {

            formatBuffer = HBufC8::NewLC(KDisplayImagesLeftToRight().Length() + description->Length() + button->Length() + 8);

            formatBuffer->Des().Format(

                    KDisplayImagesLeftToRight(),

                    iAutoLoadImages,

                    iVisibleWidth,

                    description,

                    button);

            }

        iWriteStream.WriteL(*formatBuffer);

        CleanupStack::PopAndDestroy(3); // description, button, formatBuffer

        iWriteStream.CommitL();

        }

    }

void CFreestyleMessageHeaderHTML::HTMLBodyStartL() const

    {

    TBuf8<KFreestyleMessageHeaderHTMLRightMarginInPx> scrollPos;

    scrollPos.AppendNum(iScrollPosition);

    iWriteStream.WriteL(_L8("<body onLoad = \"init("));

    iWriteStream.WriteL(scrollPos);

    iWriteStream.WriteL(_L8(")\">\n"));

    iWriteStream.CommitL();

    }

    {

// -----------------------------------------------------------------------------

// CFreestyleMessageHeaderHTML::WriteSubjectL

// Writes the subject to iWriteStream and also

// takes care of the urls and marks them as hotspots

// -----------------------------------------------------------------------------

//

void CFreestyleMessageHeaderHTML::WriteSubjectL(TDesC& aText ) const

    {

    /* 

    * Add these to searchcases to make it also search 

    * for emailaddress and phonenumber :

    * CFindItemEngine::EFindItemSearchMailAddressBin |

    * CFindItemEngine::EFindItemSearchPhoneNumberBin |

    */

    // Search for urls    

    TInt searchCases = CFindItemEngine::EFindItemSearchURLBin;

    CFindItemEngine* itemEngine =

              CFindItemEngine::NewL ( aText,

                       ( CFindItemEngine::TFindItemSearchCase ) searchCases );

    CleanupStack::PushL (itemEngine );

    const CArrayFixFlat<CFindItemEngine::SFoundItem>

            * foundItems = itemEngine->ItemArray ( );

    TInt index = 0;

    // For each found item

    for (TInt i=0; i<foundItems->Count ( ); ++i )

        {

        // iItemType, iStartPos, iLength

        const CFindItemEngine::SFoundItem& item = foundItems->At (i );

        HBufC* valueBuf = aText.Mid (item.iStartPos, item.iLength ).AllocL ( );

        CleanupStack::PushL (valueBuf );

        // We write the normal text to iWriteStream before and between the links in the header subject field

        if(item.iStartPos > 0)

            {

            TInt itemstart = item.iStartPos;

            HBufC* normalText = aText.Mid(index, itemstart-index).Alloc();

            CleanupStack::PushL( normalText );

            HBufC8* normalText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( *normalText );

            CleanupStack::PushL( normalText8 );

            iWriteStream.WriteL( *normalText8 );

            CleanupStack::PopAndDestroy( 2 ); //normalText8m, normalText

            }        

        switch (item.iItemType )

            {

            /* To make header subjectfield to recognise also phonenumber and emailadress just 

             * add CFindItemEngine::EFindItemSearchMailAddressBin & 

             * CFindItemEngine::EFindItemSearchPhoneNumberBin cases here.

             */

            case CFindItemEngine::EFindItemSearchURLBin:

                {

                HBufC8* url8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( *valueBuf );

                CFreestyleMessageHeaderURL *fsurl = FreestyleMessageHeaderURLFactory::CreateEmailSubjectUrlL(*valueBuf);

                delete fsurl;

                CleanupStack::PushL( url8 );

                StartHyperlinkL(*url8);

                iWriteStream.WriteL(*url8);

                EndHyperlinkL();

                CleanupStack::PopAndDestroy( url8 );

                break;

                }

            default:

                {

                break;

                }

            }        

        index = item.iStartPos+item.iLength;

        CleanupStack::PopAndDestroy (valueBuf );

        }

        //Write the rest of the subject to subject field if we are not 

        //at the end of the subject already, or if there wasn't any

        //url items write the whole subject field here

        if(index < aText.Length() )

            {

            HBufC* normalText = aText.Mid(index, aText.Length()-index).Alloc();

            CleanupStack::PushL( normalText );

            HBufC8* normalText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( *normalText );

            CleanupStack::PushL( normalText8 );

            iWriteStream.WriteL( *normalText8 );

            CleanupStack::PopAndDestroy( 2 ); //normalText8m, normalText

            }

    CleanupStack::PopAndDestroy (itemEngine );

    }

HBufC8* CFreestyleMessageHeaderHTML::HTMLHeaderFollowUpIconLC( TBool aShowText ) const

    {

    HBufC8* followUpText8( NULL );

    HBufC8* followUpCompletedText8( NULL );

    // Reserve space with worst case scenario in mind. 

    TInt textLength( 0 );

    if ( aShowText )

        {

        // Follow up completed.

        HBufC* followUpCompletedText = StringLoader::LoadLC( 

                R_FREESTYLE_EMAIL_UI_VIEWER_COMPLETED );

        followUpCompletedText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( 

                *followUpCompletedText );

        CleanupStack::PopAndDestroy( followUpCompletedText );

        CleanupStack::PushL( followUpCompletedText8 );

        // Follow up.

        HBufC* followUpText = StringLoader::LoadLC( 

                R_FREESTYLE_EMAIL_UI_VIEWER_FOLLOWUP );

        followUpText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( 

                *followUpText );

        CleanupStack::PopAndDestroy( followUpText );

        CleanupStack::PushL( followUpText8 );

        textLength += KHTMLImgTagId().Length() +

                      KFollowUpCompleteImageName().Length() +

                      KHTMLImgTagSrcBefore().Length() +

                      KFollowUpCompleteIconFileName().Length() +

                      KHTMLImgTagSrcAfter().Length() +

                      ( followUpText8->Length() >= followUpCompletedText8->Length() ?

                      followUpText8->Length() : followUpCompletedText8->Length() ); 

        }

    else

        {

        // Plain icon and no text.

        textLength += KHTMLImgTagId().Length() + 

                      KFollowUpCompleteImageName().Length() +

                      KHTMLImgTagSrcBefore().Length() +

                      KFollowUpCompleteIconFileName().Length() +

                      KHTMLImgTagSrcAfter().Length();

        }

    // Allocate space.

    HBufC8* iconText8 = HBufC8::NewLC( textLength );    

    // Generate HTML code

    TPtr8 iconPtr( iconText8->Des() );

    if ( iMailMessage.IsFlagSet( EFSMsgFlag_FollowUp ) )

        {

        iconPtr.Append( KHTMLImgTagId );

        iconPtr.Append( KFollowUpImageName );

        iconPtr.Append( KHTMLImgTagSrcBefore );

        iconPtr.Append( KFollowUpIconFileName );

        iconPtr.Append( KHTMLImgTagSrcAfter );

        if ( aShowText && followUpText8 )

            {

            iconPtr.Append( followUpText8->Des() );

            }

        }

    else if ( iMailMessage.IsFlagSet( EFSMsgFlag_FollowUpComplete ) )

        {

        iconPtr.Append( KHTMLImgTagId );

        iconPtr.Append( KFollowUpCompleteImageName );

        iconPtr.Append( KHTMLImgTagSrcBefore );

        iconPtr.Append( KFollowUpCompleteIconFileName );

        iconPtr.Append( KHTMLImgTagSrcAfter );

        if ( aShowText && followUpCompletedText8 )

            {

            iconPtr.Append( followUpCompletedText8->Des() );

            }

        }

    else

        {

        // No follow up flag set.

        CleanupStack::PopAndDestroy( iconText8 );

        iconText8 = NULL;

        }

    if ( aShowText )

        {

        if ( iconText8 )

            {

            CleanupStack::Pop( iconText8 );

            }

        CleanupStack::PopAndDestroy( followUpText8 );

        CleanupStack::PopAndDestroy( followUpCompletedText8 );

        if ( iconText8 )

            {

            CleanupStack::PushL( iconText8 );

            }

        }