/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* which accompanies this distribution, and is available

*

* 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 <FreestyleEmailUi.rsg>

#include "FreestyleMessageHeaderHTML.h"

#include "FreestyleEmailUiUtilities.h"

#include "ncsconstants.h"

_LIT8( KShowDetailIconFileName, "plus.gif");

_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( KHeaderTableName, "header_table");

_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( KDetailImageName, "detail_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( KAttachmentSizeUnit, "kb");

_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" );

const TInt KMaxEventLength( 256 );

const TInt KFreestyleMessageHeaderHTMLRightMarginInPx( 10 );

const TInt KFreestyleMessageHeaderHTMLMaxBufferSizeForWidth( 5 );

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

                                                                         RWriteStream& aWriteStream,

                                                                         TInt aVisibleWidth,

                                                                         TInt aScrollPosition,

                                                                         TBidiText::TDirectionality aDirectionality

                                                                         )

    {

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

    self->ConstructL();

    return self;

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL( CFSMailMessage& aMailMessage, 

                                                    RWriteStream& aWriteStream, 

                                                    TInt aVisibleWidth,

                                                    TInt aScrollPosition,

                                                    TBidiText::TDirectionality aDirectionality)

    {

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

    CleanupStack::PushL( headerHtml );

    headerHtml->ExportL();

    CleanupStack::PopAndDestroy( headerHtml );

    }

EXPORT_C void CFreestyleMessageHeaderHTML::ExportL( CFSMailMessage& aMailMessage, 

                                                    RFile& aFile, 

                                                    TInt aVisibleWidth,

                                                    TInt aScrollPosition,

                                                    TBidiText::TDirectionality aDirectionality)

    {

    RFileWriteStream fwstream;

    fwstream.Attach( aFile, 0 );

    CleanupClosePushL( fwstream );

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

    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,

                                                    TBidiText::TDirectionality aDirectionality)

    {

    RFileWriteStream fwstream;

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

    CleanupClosePushL( fwstream );

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

    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,

                                                          TBidiText::TDirectionality aDirectionality )

    : iMailMessage( aMailMessage ),

    iWriteStream( aWriteStream ),

    iVisibleWidth( aVisibleWidth - KFreestyleMessageHeaderHTMLRightMarginInPx ),

    iScrollPosition(aScrollPosition),

    iDirectionality( aDirectionality )

    {

    }

void CFreestyleMessageHeaderHTML::ConstructL()

    {

    iMailMessage.AttachmentListL( iAttachments );

    }

void CFreestyleMessageHeaderHTML::HTMLStartL() const

    {

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

    if ( iDirectionality == TBidiText::ERightToLeft )

        {

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

        }    

    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();

    ExportInitialTableL();

    StartHeaderTableL( KHeaderTableName );

    ExportFromL();

    ExportToL();

    ExportCcL();

    ExportBccL();

    ExportSentTimeL();

    ExportSubjectL();

    EndHeaderTableL();

    ExportAttachmentsL();

    HTMLBodyEndL();

    }

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();

    }

void CFreestyleMessageHeaderHTML::ExportInitialTableL() const

    {

    // set the width, using the visible screen width

    TBuf8<KFreestyleMessageHeaderHTMLMaxBufferSizeForWidth> tableWidth;

    tableWidth.AppendNum( iVisibleWidth );

    iWriteStream.WriteL(_L8("<table id=\"table_initial\" border=\"0\" width=\""));

    iWriteStream.WriteL( tableWidth );

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

    // start first row: table with the sent info and the '+' icon

    iWriteStream.WriteL(_L8("<tr><td><table id=\"table_sent_and_plus\" border=\"0\" width=\""));

    iWriteStream.WriteL( tableWidth );

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

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

    // add Sent time and date

    iWriteStream.WriteL(_L8("<td id=\"sent_initial\""));

    if ( iDirectionality == TBidiText::ELeftToRight )

        {

        iWriteStream.WriteL(_L8(" align=\"left\""));

        }

    else

        {

        iWriteStream.WriteL(_L8(" align=\"right\""));

        }

    iWriteStream.WriteL(_L8(" valign=\"bottom\">"));

    HBufC* dateText = TFsEmailUiUtility::DateTextFromMsgLC( &iMailMessage );

    HBufC* timeText = TFsEmailUiUtility::TimeTextFromMsgLC( &iMailMessage );

    TInt len = dateText->Length() + KSentLineDateAndTimeSeparatorText().Length() + timeText->Length();

    HBufC* sentTimeText = HBufC::NewLC( len );

    TPtr sentTimeTextPtr = sentTimeText->Des();

    sentTimeTextPtr.Append( *dateText );

    sentTimeTextPtr.Append( KSentLineDateAndTimeSeparatorText );

    sentTimeTextPtr.Append( *timeText );

    HBufC8* sentTimeText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( sentTimeTextPtr );

    CleanupStack::PushL( sentTimeText8 );

    iWriteStream.WriteL( *sentTimeText8 );

    CleanupStack::PopAndDestroy( sentTimeText8 );

    CleanupStack::PopAndDestroy( sentTimeText );

    CleanupStack::PopAndDestroy( timeText );

    CleanupStack::PopAndDestroy( dateText );

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

    // add "show details" image on the same line as Sent time and date

    iWriteStream.WriteL(_L8("<td width=\"1\" valign=\"top\""));

    if ( iDirectionality == TBidiText::ELeftToRight )

        {

        iWriteStream.WriteL(_L8(" align=\"right\""));

        }

    else

        {

        iWriteStream.WriteL(_L8(" align=\"left\""));

        }

    iWriteStream.WriteL(_L8(" style=\"padding: 0px 10px 0px 0px;\"><image id=\"detail_img\" border=\"0\" src=\"plus.gif\" onClick=\"expandHeader()\" ></td>\n"));

    // finish first row

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

    iWriteStream.WriteL(_L8("</table></td></tr>\n"));

    //=============================

    // start second row which contains subject

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

    iWriteStream.WriteL(_L8("<td id=\"subject_initial\""));

    if ( iDirectionality == TBidiText::ELeftToRight )

        {

        iWriteStream.WriteL(_L8(" align=\"left\""));

        }

    else

        {

        iWriteStream.WriteL(_L8(" align=\"right\""));

        }

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

    HBufC8* subject8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( iMailMessage.GetSubject() );

    CleanupStack::PushL( subject8 );

    iWriteStream.WriteL( *subject8 );

    CleanupStack::PopAndDestroy( subject8 );

    iWriteStream.WriteL(_L8("</b>"));

    // Write icons (if necessary).

    HBufC8* followUp = HTMLHeaderFollowUpIconLC( EFalse );

    HBufC8* priority = HTMLHeaderPriorityIconLC( EFalse );

    if ( priority )

        {

        iWriteStream.WriteL( *priority );

        CleanupStack::PopAndDestroy( priority);

        }

    if ( followUp )

        {

        iWriteStream.WriteL( *followUp );

        CleanupStack::PopAndDestroy( followUp );

        }

    iWriteStream.WriteL(_L8("</td></tr>\n"));  // finish subject row

    // end table_initial

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

    iWriteStream.CommitL();

    }

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 );

            }

        }

    return iconText8;

    }

HBufC8* CFreestyleMessageHeaderHTML::HTMLHeaderPriorityIconLC( TBool aShowText ) const

    {

    HBufC8* highPrioText8( NULL );

    HBufC8* lowPrioText8( NULL );

    // Reserve space with worst case scenario in mind. 

    TInt textLength( 0 );

    if ( aShowText )

        {

        // High priority.

        HBufC* highPrioText = StringLoader::LoadLC( 

                R_FREESTYLE_EMAIL_UI_VIEWER_HIGH_PRIO );

        highPrioText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( 

                *highPrioText );

        CleanupStack::PopAndDestroy( highPrioText );

        CleanupStack::PushL( highPrioText8 );

        // Low priority.

        HBufC* lowPrioText = StringLoader::LoadLC( 

                R_FREESTYLE_EMAIL_UI_VIEWER_LOW_PRIO );

        lowPrioText8 = CnvUtfConverter::ConvertFromUnicodeToUtf8L( 

                *lowPrioText );

        CleanupStack::PopAndDestroy( lowPrioText );

        CleanupStack::PushL( lowPrioText8 );

        textLength += KHTMLImgTagId().Length() +

                      KPriorityHighImageName().Length() +

                      KHTMLImgTagSrcBefore().Length() +

                      KPriorityHighIconFileName().Length() +

                      KHTMLImgTagSrcAfter().Length() +

                      ( lowPrioText8->Length() >= highPrioText8->Length() ?

                      lowPrioText8->Length() : highPrioText8->Length() ); 

        }

    else

        {

        // Plain icon and no text.

        textLength += KHTMLImgTagId().Length() + 

                      KPriorityHighImageName().Length() +

                      KHTMLImgTagSrcBefore().Length() +

                      KPriorityHighIconFileName().Length() +

                      KHTMLImgTagSrcAfter().Length();

        }

    // Allocate space.

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

    // Generate HTML code

    TPtr8 iconPtr( iconText8->Des() );

    if ( iMailMessage.IsFlagSet( EFSMsgFlag_Low ) )