/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
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 *
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 * only, as published by the Free Software Foundation.
 *
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
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 * <http://www.openoffice.org/license.html>
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#include "sal/config.h"

#include <hintids.hxx>
#include <cmdid.h>

#include <com/sun/star/beans/XMultiPropertySet.hpp>
#include <com/sun/star/beans/XPropertiesChangeListener.hpp>
#include <cppuhelper/implbase1.hxx>
#include <officecfg/Office/Common.hxx>
#include <rtl/ustring.hxx>
#include <sal/log.hxx>
#include <vcl/textview.hxx>
#include <svx/svxids.hrc>
#include <vcl/scrbar.hxx>
#include <sfx2/dispatch.hxx>
#include <sfx2/app.hxx>
#include <svtools/htmltokn.h>
#include <vcl/txtattr.hxx>
#include <svtools/colorcfg.hxx>
#include <editeng/flstitem.hxx>
#include <vcl/metric.hxx>
#include <svtools/ctrltool.hxx>
#include <tools/time.hxx>
#include <swmodule.hxx>
#include <docsh.hxx>
#include <srcview.hxx>
#include <helpid.h>
#include <deque>

namespace {

namespace css = com::sun::star;

}

struct SwTextPortion
{
    sal_uInt16 nLine;
    sal_uInt16 nStart, nEnd;
    svtools::ColorConfigEntry eType;
};

#define MAX_SYNTAX_HIGHLIGHT 20
#define MAX_HIGHLIGHTTIME 200
#define SYNTAX_HIGHLIGHT_TIMEOUT 200

typedef std::deque<SwTextPortion> SwTextPortions;

static void lcl_Highlight(const String& rSource, SwTextPortions& aPortionList)
{
    const sal_Unicode cOpenBracket = '<';
    const sal_Unicode cCloseBracket= '>';
    const sal_Unicode cSlash        = '/';
    const sal_Unicode cExclamation = '!';
    const sal_Unicode cMinus        = '-';
    const sal_Unicode cSpace        = ' ';
    const sal_Unicode cTab          = 0x09;
    const sal_Unicode cLF          = 0x0a;
    const sal_Unicode cCR          = 0x0d;


    const sal_uInt16 nStrLen = rSource.Len();
    sal_uInt16 nInsert = 0;         // number of inserted portions
    sal_uInt16 nActPos = 0;         // position, where '<' was found
    sal_uInt16 nOffset = 0;         // Offset of nActPos to '<'
    sal_uInt16 nPortStart = USHRT_MAX;  // for the TextPortion
    sal_uInt16 nPortEnd  =  0;          //
    SwTextPortion aText;
    while(nActPos < nStrLen)
    {
        svtools::ColorConfigEntry eFoundType = svtools::HTMLUNKNOWN;
        if(rSource.GetChar(nActPos) == cOpenBracket && nActPos < nStrLen - 2 )
        {
            // insert 'empty' portion
            if(nPortEnd < nActPos - 1 )
            {
                aText.nLine = 0;
                // don't move at the beginning
                aText.nStart = nPortEnd;
                if(nInsert)
                    aText.nStart += 1;
                aText.nEnd = nActPos - 1;
                aText.eType = svtools::HTMLUNKNOWN;
                aPortionList.push_back( aText );
                nInsert++;
            }
            sal_Unicode cFollowFirst = rSource.GetChar((xub_StrLen)(nActPos + 1));
            sal_Unicode cFollowNext = rSource.GetChar((xub_StrLen)(nActPos + 2));
            if(cExclamation == cFollowFirst)
            {
                // "<!" SGML or comment
                if(cMinus == cFollowNext &&
                    nActPos < nStrLen - 3 && cMinus == rSource.GetChar((xub_StrLen)(nActPos + 3)))
                {
                    eFoundType = svtools::HTMLCOMMENT;
                }
                else
                    eFoundType = svtools::HTMLSGML;
                nPortStart = nActPos;
                nPortEnd = nActPos + 1;
            }
            else if(cSlash == cFollowFirst)
            {
                // "</" ignore slash
                nPortStart = nActPos;
                nActPos++;
                nOffset++;
            }
            if(svtools::HTMLUNKNOWN == eFoundType)
            {
                // now here a keyword could follow
                sal_uInt16 nSrchPos = nActPos;
                while(++nSrchPos < nStrLen - 1)
                {
                    sal_Unicode cNext = rSource.GetChar(nSrchPos);
                    if( cNext == cSpace ||
                        cNext == cTab   ||
                        cNext == cLF    ||
                        cNext == cCR)
                        break;
                    else if(cNext == cCloseBracket)
                    {
                        break;
                    }
                }
                if(nSrchPos > nActPos + 1)
                {
                    // some string was found
                    String sToken = rSource.Copy(nActPos + 1, nSrchPos - nActPos - 1 );
                    sToken.ToUpperAscii();
                    int nToken = ::GetHTMLToken(sToken);
                    if(nToken)
                    {
                        // Token was found
                        eFoundType = svtools::HTMLKEYWORD;
                        nPortEnd = nSrchPos;
                        nPortStart = nActPos;
                    }
                    else
                    {
                        // what was that?
                        SAL_WARN(
                            "sw.level2",
                            "Token " << rtl::OUString(sToken)
                                << " not recognised!");
                    }

                }
            }
            // now we still have to look for '>'
            if(svtools::HTMLUNKNOWN != eFoundType)
            {
                sal_Bool bFound = sal_False;
                for(sal_uInt16 i = nPortEnd; i < nStrLen; i++)
                    if(cCloseBracket == rSource.GetChar(i))
                    {
                        bFound = sal_True;
                        nPortEnd = i;
                        break;
                    }
                if(!bFound && (eFoundType == svtools::HTMLCOMMENT))
                {
                    // comment without ending in this line
                    bFound  = sal_True;
                    nPortEnd = nStrLen - 1;
                }

                if(bFound ||(eFoundType == svtools::HTMLCOMMENT))
                {
                    SwTextPortion aTextPortion;
                    aTextPortion.nLine = 0;
                    aTextPortion.nStart = nPortStart + 1;
                    aTextPortion.nEnd = nPortEnd;
                    aTextPortion.eType = eFoundType;
                    aPortionList.push_back( aTextPortion );
                    nInsert++;
                    eFoundType = svtools::HTMLUNKNOWN;
                }

            }
        }
        nActPos++;
    }
    if(nInsert && nPortEnd < nActPos - 1)
    {
        aText.nLine = 0;
        aText.nStart = nPortEnd + 1;
        aText.nEnd = nActPos - 1;
        aText.eType = svtools::HTMLUNKNOWN;
        aPortionList.push_back( aText );
        nInsert++;
    }
}

class SwSrcEditWindow::ChangesListener:
    public cppu::WeakImplHelper1< css::beans::XPropertiesChangeListener >
{
public:
    ChangesListener(SwSrcEditWindow & editor): editor_(editor) {}

private:
    virtual ~ChangesListener() {}

    virtual void SAL_CALL disposing(css::lang::EventObject const &)
        throw (css::uno::RuntimeException)
    {
        osl::MutexGuard g(editor_.mutex_);
        editor_.notifier_.clear();
    }

    virtual void SAL_CALL propertiesChange(
        css::uno::Sequence< css::beans::PropertyChangeEvent > const &)
        throw (css::uno::RuntimeException)
    {
        SolarMutexGuard g;
        editor_.SetFont();
    }

    SwSrcEditWindow & editor_;
};

SwSrcEditWindow::SwSrcEditWindow( Window* pParent, SwSrcView* pParentView ) :
    Window( pParent, WB_BORDER|WB_CLIPCHILDREN ),

    pTextEngine(0),

    pOutWin(0),
    pHScrollbar(0),
    pVScrollbar(0),

    pSrcView(pParentView),

    nCurTextWidth(0),
    nStartLine(USHRT_MAX),
    eSourceEncoding(osl_getThreadTextEncoding()),
    bDoSyntaxHighlight(sal_True),
    bHighlighting(sal_False)
{
    SetHelpId(HID_SOURCE_EDITWIN);
    CreateTextEngine();

    // Using "this" in ctor is a little fishy, but should work here at least as
    // long as there are no derivations:
    listener_ = new ChangesListener(*this);
    css::uno::Reference< css::beans::XMultiPropertySet > n(
        officecfg::Office::Common::Font::SourceViewFont::get(),
        css::uno::UNO_QUERY_THROW);
    {
        osl::MutexGuard g(mutex_);
        notifier_ = n;
    }
    css::uno::Sequence< rtl::OUString > s(2);
    s[0] = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("FontHeight"));
    s[1] = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("FontName"));
    n->addPropertiesChangeListener(s, listener_.get());
}

 SwSrcEditWindow::~SwSrcEditWindow()
{
    css::uno::Reference< css::beans::XMultiPropertySet > n;
    {
        osl::MutexGuard g(mutex_);
        n = notifier_;
    }
    if (n.is()) {
        n->removePropertiesChangeListener(listener_.get());
    }
    aSyntaxIdleTimer.Stop();
    if ( pTextEngine )
    {
        EndListening( *pTextEngine );
        pTextEngine->RemoveView( pTextView );

        delete pHScrollbar;
        delete pVScrollbar;

        delete pTextView;
        delete pTextEngine;
    }
    delete pOutWin;
}

void SwSrcEditWindow::DataChanged( const DataChangedEvent& rDCEvt )
{
    Window::DataChanged( rDCEvt );

    switch ( rDCEvt.GetType() )
    {
    case DATACHANGED_SETTINGS:
        // newly rearrange ScrollBars or trigger Resize, because
        // ScrollBar size could have changed. For this, in the
        // Resize handler the size of ScrollBars has to be queried
        // from the settings as well.
        if( rDCEvt.GetFlags() & SETTINGS_STYLE )
            Resize();
        break;
    }
}

void  SwSrcEditWindow::Resize()
{
    // ScrollBars, etc. happens in Adjust...
    if ( pTextView )
    {
        long nVisY = pTextView->GetStartDocPos().Y();
        pTextView->ShowCursor();
        Size aOutSz( GetOutputSizePixel() );
        long nMaxVisAreaStart = pTextView->GetTextEngine()->GetTextHeight() - aOutSz.Height();
        if ( nMaxVisAreaStart < 0 )
            nMaxVisAreaStart = 0;
        if ( pTextView->GetStartDocPos().Y() > nMaxVisAreaStart )
        {
            Point aStartDocPos( pTextView->GetStartDocPos() );
            aStartDocPos.Y() = nMaxVisAreaStart;
            pTextView->SetStartDocPos( aStartDocPos );
            pTextView->ShowCursor();
        }
        long nScrollStd = GetSettings().GetStyleSettings().GetScrollBarSize();
        Size aScrollSz(aOutSz.Width() - nScrollStd, nScrollStd );
        Point aScrollPos(0, aOutSz.Height() - nScrollStd);

        pHScrollbar->SetPosSizePixel( aScrollPos, aScrollSz);

        aScrollSz.Width() = aScrollSz.Height();
        aScrollSz.Height() = aOutSz.Height();
        aScrollPos = Point(aOutSz.Width() - nScrollStd, 0);

        pVScrollbar->SetPosSizePixel( aScrollPos, aScrollSz);
        aOutSz.Width()  -= nScrollStd;
        aOutSz.Height()     -= nScrollStd;
        pOutWin->SetOutputSizePixel(aOutSz);
        InitScrollBars();

        // set line in first Resize
        if(USHRT_MAX != nStartLine)
        {
            if(nStartLine < pTextEngine->GetParagraphCount())
            {
                TextSelection aSel(TextPaM( nStartLine, 0 ), TextPaM( nStartLine, 0x0 ));
                pTextView->SetSelection(aSel);
                pTextView->ShowCursor();
            }
            nStartLine = USHRT_MAX;
        }

        if ( nVisY != pTextView->GetStartDocPos().Y() )
            Invalidate();
    }

}

void TextViewOutWin::DataChanged( const DataChangedEvent& rDCEvt )
{
    Window::DataChanged( rDCEvt );

    switch( rDCEvt.GetType() )
    {
    case DATACHANGED_SETTINGS:
        // query settings
        if( rDCEvt.GetFlags() & SETTINGS_STYLE )
        {
            const Color &rCol = GetSettings().GetStyleSettings().GetWindowColor();
            SetBackground( rCol );
            Font aFont( pTextView->GetTextEngine()->GetFont() );
            aFont.SetFillColor( rCol );
            pTextView->GetTextEngine()->SetFont( aFont );
        }
        break;
    }
}

void  TextViewOutWin::MouseMove( const MouseEvent &rEvt )
{
    if ( pTextView )
        pTextView->MouseMove( rEvt );
}

void  TextViewOutWin::MouseButtonUp( const MouseEvent &rEvt )
{
    if ( pTextView )
    {
        pTextView->MouseButtonUp( rEvt );
        SfxBindings& rBindings = ((SwSrcEditWindow*)GetParent())->GetSrcView()->GetViewFrame()->GetBindings();
        rBindings.Invalidate( SID_TABLE_CELL );
        rBindings.Invalidate( SID_CUT );
        rBindings.Invalidate( SID_COPY );
    }
}

void  TextViewOutWin::MouseButtonDown( const MouseEvent &rEvt )
{
    GrabFocus();
    if ( pTextView )
        pTextView->MouseButtonDown( rEvt );
}

void  TextViewOutWin::Command( const CommandEvent& rCEvt )
{
    switch(rCEvt.GetCommand())
    {
        case COMMAND_CONTEXTMENU:
            ((SwSrcEditWindow*)GetParent())->GetSrcView()->GetViewFrame()->
                GetDispatcher()->ExecutePopup();
        break;
        case COMMAND_WHEEL:
        case COMMAND_STARTAUTOSCROLL:
        case COMMAND_AUTOSCROLL:
        {
            const CommandWheelData* pWData = rCEvt.GetWheelData();
            if( !pWData || COMMAND_WHEEL_ZOOM != pWData->GetMode() )
            {
                ((SwSrcEditWindow*)GetParent())->HandleWheelCommand( rCEvt );
            }
        }
        break;

        default:
            if ( pTextView )
            pTextView->Command( rCEvt );
        else
            Window::Command(rCEvt);
    }
}

void  TextViewOutWin::KeyInput( const KeyEvent& rKEvt )
{
    sal_Bool bDone = sal_False;
    SwSrcEditWindow* pSrcEditWin = (SwSrcEditWindow*)GetParent();
    sal_Bool bChange = !pSrcEditWin->IsReadonly() || !TextEngine::DoesKeyChangeText( rKEvt );
    if(bChange)
        bDone = pTextView->KeyInput( rKEvt );

    SfxBindings& rBindings = ((SwSrcEditWindow*)GetParent())->GetSrcView()->GetViewFrame()->GetBindings();
    if ( !bDone )
    {
        if ( !SfxViewShell::Current()->KeyInput( rKEvt ) )
            Window::KeyInput( rKEvt );
    }
    else
    {
        rBindings.Invalidate( SID_TABLE_CELL );
        if ( rKEvt.GetKeyCode().GetGroup() == KEYGROUP_CURSOR )
            rBindings.Update( SID_BASICIDE_STAT_POS );
        if (pSrcEditWin->GetTextEngine()->IsModified() )
        {
            rBindings.Invalidate( SID_SAVEDOC );
            rBindings.Invalidate( SID_DOC_MODIFIED );
        }
        if( rKEvt.GetKeyCode().GetCode() == KEY_INSERT )
            rBindings.Invalidate( SID_ATTR_INSERT );
    }

    rBindings.Invalidate( SID_CUT );
    rBindings.Invalidate( SID_COPY );

    SwDocShell* pDocShell = pSrcEditWin->GetSrcView()->GetDocShell();
    if(pSrcEditWin->GetTextEngine()->IsModified())
    {
        pDocShell->SetModified();
    }
}

void  TextViewOutWin::Paint( const Rectangle& rRect )
{
    pTextView->Paint( rRect );
}

void SwSrcEditWindow::CreateTextEngine()
{
    const Color &rCol = GetSettings().GetStyleSettings().GetWindowColor();
    pOutWin = new TextViewOutWin(this, 0);
    pOutWin->SetBackground(Wallpaper(rCol));
    pOutWin->SetPointer(Pointer(POINTER_TEXT));
    pOutWin->Show();

    // create Scrollbars
    pHScrollbar = new ScrollBar(this, WB_3DLOOK |WB_HSCROLL|WB_DRAG);
        pHScrollbar->EnableRTL( false ); // --- RTL --- no mirroring for scrollbars
    pHScrollbar->SetScrollHdl(LINK(this, SwSrcEditWindow, ScrollHdl));
    pHScrollbar->Show();

    pVScrollbar = new ScrollBar(this, WB_3DLOOK |WB_VSCROLL|WB_DRAG);
        pVScrollbar->EnableRTL( false ); // --- RTL --- no mirroring for scrollbars
    pVScrollbar->SetScrollHdl(LINK(this, SwSrcEditWindow, ScrollHdl));
    pHScrollbar->EnableDrag();
    pVScrollbar->Show();

    pTextEngine = new ExtTextEngine;
    pTextView = new ExtTextView( pTextEngine, pOutWin );
    pTextView->SetAutoIndentMode(sal_True);
    pOutWin->SetTextView(pTextView);

    pTextEngine->SetUpdateMode( sal_False );
    pTextEngine->InsertView( pTextView );

    Font aFont;
    aFont.SetTransparent( sal_False );
    aFont.SetFillColor( rCol );
    SetPointFont( aFont );
    aFont = GetFont();
    aFont.SetFillColor( rCol );
    pOutWin->SetFont( aFont );
    pTextEngine->SetFont( aFont );

    aSyntaxIdleTimer.SetTimeout( SYNTAX_HIGHLIGHT_TIMEOUT );
    aSyntaxIdleTimer.SetTimeoutHdl( LINK( this, SwSrcEditWindow, SyntaxTimerHdl ) );

    pTextEngine->EnableUndo( sal_True );
    pTextEngine->SetUpdateMode( sal_True );

    pTextView->ShowCursor( sal_True, sal_True );
    InitScrollBars();
    StartListening( *pTextEngine );

    SfxBindings& rBind = GetSrcView()->GetViewFrame()->GetBindings();
    rBind.Invalidate( SID_TABLE_CELL );
}

void SwSrcEditWindow::SetScrollBarRanges()
{
    // Extra method, not InitScrollBars, because also for TextEngine events.

    pHScrollbar->SetRange( Range( 0, nCurTextWidth-1 ) );
    pVScrollbar->SetRange( Range(0, pTextEngine->GetTextHeight()-1) );
}

void SwSrcEditWindow::InitScrollBars()
{
    SetScrollBarRanges();

    Size aOutSz( pOutWin->GetOutputSizePixel() );
    pVScrollbar->SetVisibleSize( aOutSz.Height() );
    pVScrollbar->SetPageSize(  aOutSz.Height() * 8 / 10 );
    pVScrollbar->SetLineSize( pOutWin->GetTextHeight() );
    pVScrollbar->SetThumbPos( pTextView->GetStartDocPos().Y() );
    pHScrollbar->SetVisibleSize( aOutSz.Width() );
    pHScrollbar->SetPageSize( aOutSz.Width() * 8 / 10 );
    pHScrollbar->SetLineSize( pOutWin->GetTextWidth(rtl::OUString('x')) );
    pHScrollbar->SetThumbPos( pTextView->GetStartDocPos().X() );

}

IMPL_LINK(SwSrcEditWindow, ScrollHdl, ScrollBar*, pScroll)
{
    if(pScroll == pVScrollbar)
    {
        long nDiff = pTextView->GetStartDocPos().Y() - pScroll->GetThumbPos();
        GetTextView()->Scroll( 0, nDiff );
        pTextView->ShowCursor( sal_False, sal_True );
        pScroll->SetThumbPos( pTextView->GetStartDocPos().Y() );
    }
    else
    {
        long nDiff = pTextView->GetStartDocPos().X() - pScroll->GetThumbPos();
        GetTextView()->Scroll( nDiff, 0 );
        pTextView->ShowCursor( sal_False, sal_True );
        pScroll->SetThumbPos( pTextView->GetStartDocPos().X() );
    }
    GetSrcView()->GetViewFrame()->GetBindings().Invalidate( SID_TABLE_CELL );
    return 0;
}

IMPL_LINK( SwSrcEditWindow, SyntaxTimerHdl, Timer *, pTimer )
{
    Time aSyntaxCheckStart( Time::SYSTEM );
    SAL_WARN_IF(pTextView == 0, "sw", "No View yet, but syntax highlighting?!");

    bHighlighting = sal_True;
    sal_uInt16 nCount  = 0;
    // at first the region around the cursor is processed
    TextSelection aSel = pTextView->GetSelection();
    sal_uInt16 nCur = (sal_uInt16)aSel.GetStart().GetPara();
    if(nCur > 40)
        nCur -= 40;
    else
        nCur = 0;
    if(!aSyntaxLineTable.empty())
        for(sal_uInt16 i = 0; i < 80 && nCount < 40; i++, nCur++)
        {
            if(aSyntaxLineTable.find(nCur) != aSyntaxLineTable.end())
            {
                DoSyntaxHighlight( nCur );
                aSyntaxLineTable.erase( nCur );
                nCount++;
                if(aSyntaxLineTable.empty())
                    break;
                if((Time( Time::SYSTEM ).GetTime() - aSyntaxCheckStart.GetTime()) > MAX_HIGHLIGHTTIME )
                {
                    pTimer->SetTimeout( 2 * SYNTAX_HIGHLIGHT_TIMEOUT );
                    break;
                }
            }
        }

    // when there is still anything left by then, go on from the beginning
    while ( !aSyntaxLineTable.empty() && nCount < MAX_SYNTAX_HIGHLIGHT)
    {
        sal_uInt16 nLine = *aSyntaxLineTable.begin();
        DoSyntaxHighlight( nLine );
        aSyntaxLineTable.erase(nLine);
        nCount ++;
        if(Time( Time::SYSTEM ).GetTime() - aSyntaxCheckStart.GetTime() > MAX_HIGHLIGHTTIME)
        {
            pTimer->SetTimeout( 2 * SYNTAX_HIGHLIGHT_TIMEOUT );
            break;
        }
    }

    if(!aSyntaxLineTable.empty() && !pTimer->IsActive())
        pTimer->Start();
    // SyntaxTimerHdl is called when text changed
    // => good opportunity to determine text width!
    long nPrevTextWidth = nCurTextWidth;
    nCurTextWidth = pTextEngine->CalcTextWidth() + 25;  // kleine Toleranz
    if ( nCurTextWidth != nPrevTextWidth )
        SetScrollBarRanges();
    bHighlighting = sal_False;

    return 0;
}

void SwSrcEditWindow::DoSyntaxHighlight( sal_uInt16 nPara )
{
    // Because of DelayedSyntaxHighlight it could happen,
    // that the line doesn't exist anymore!
    if ( nPara < pTextEngine->GetParagraphCount() )
    {
        sal_Bool bTempModified = IsModified();
        pTextEngine->RemoveAttribs( nPara, (sal_Bool)sal_True );
        String aSource( pTextEngine->GetText( nPara ) );
        pTextEngine->SetUpdateMode( sal_False );
        ImpDoHighlight( aSource, nPara );
        TextView* pTmp = pTextEngine->GetActiveView();
        pTmp->SetAutoScroll(sal_False);
        pTextEngine->SetActiveView(0);
        pTextEngine->SetUpdateMode( sal_True );
        pTextEngine->SetActiveView(pTmp);
        pTmp->SetAutoScroll(sal_True);
        pTmp->ShowCursor( sal_False/*pTmp->IsAutoScroll()*/ );

        if(!bTempModified)
            ClearModifyFlag();
    }
}

void SwSrcEditWindow::DoDelayedSyntaxHighlight( sal_uInt16 nPara )
{
    if ( !bHighlighting && bDoSyntaxHighlight )
    {
        aSyntaxLineTable.insert( nPara );
        aSyntaxIdleTimer.Start();
    }
}

void SwSrcEditWindow::ImpDoHighlight( const String& rSource, sal_uInt16 nLineOff )
{
    SwTextPortions aPortionList;
    lcl_Highlight(rSource, aPortionList);

    size_t nCount = aPortionList.size();
    if ( !nCount )
        return;

    SwTextPortion& rLast = aPortionList[nCount-1];
    if ( rLast.nStart > rLast.nEnd )    // Only until Bug from MD is resolved
    {
        nCount--;
        aPortionList.pop_back();
        if ( !nCount )
            return;
    }

    // maybe optimize:
    // If frequently the same color, blank without color in between,
    // maybe summarize or at least the blank; for less attributes
    sal_Bool bOptimizeHighlight = sal_True; // war in der BasicIDE static
    if ( bOptimizeHighlight )
    {
        // Only blanks and tabs have to be attributed along.
        // When two identical attributes are placed consecutively,
        // it optimises the TextEngine.
        sal_uInt16 nLastEnd = 0;

        for ( size_t i = 0; i < nCount; i++ )
        {
            SwTextPortion& r = aPortionList[i];
            SAL_WARN_IF(
                r.nLine != aPortionList[0].nLine, "sw.level2",
                "multiple lines after all?");
            if ( r.nStart > r.nEnd )    // only until Bug from MD is resolved
                continue;

            if ( r.nStart > nLastEnd )
            {
                // Can I rely on the fact that all except blank and tab
                // are being highlighted?!
                r.nStart = nLastEnd;
            }
            nLastEnd = r.nEnd+1;
            if ( ( i == (nCount-1) ) && ( r.nEnd < rSource.Len() ) )
                r.nEnd = rSource.Len();
        }
    }

    for ( size_t i = 0; i < aPortionList.size(); i++ )
    {
        SwTextPortion& r = aPortionList[i];
        if ( r.nStart > r.nEnd )    // only until Bug from MD is resolved
            continue;
        if(r.eType !=  svtools::HTMLSGML    &&
            r.eType != svtools::HTMLCOMMENT &&
            r.eType != svtools::HTMLKEYWORD &&
            r.eType != svtools::HTMLUNKNOWN)
                r.eType = svtools::HTMLUNKNOWN;
        Color aColor((ColorData)SW_MOD()->GetColorConfig().GetColorValue((svtools::ColorConfigEntry)r.eType).nColor);
        sal_uInt16 nLine = nLineOff+r.nLine; //
        pTextEngine->SetAttrib( TextAttribFontColor( aColor ), nLine, r.nStart, r.nEnd+1, sal_True );
    }
}

void SwSrcEditWindow::Notify( SfxBroadcaster& /*rBC*/, const SfxHint& rHint )
{
    if ( rHint.ISA( TextHint ) )
    {
        const TextHint& rTextHint = (const TextHint&)rHint;
        if( rTextHint.GetId() == TEXT_HINT_VIEWSCROLLED )
        {
            pHScrollbar->SetThumbPos( pTextView->GetStartDocPos().X() );
            pVScrollbar->SetThumbPos( pTextView->GetStartDocPos().Y() );
        }
        else if( rTextHint.GetId() == TEXT_HINT_TEXTHEIGHTCHANGED )
        {
            if ( (long)pTextEngine->GetTextHeight() < pOutWin->GetOutputSizePixel().Height() )
                pTextView->Scroll( 0, pTextView->GetStartDocPos().Y() );
            pVScrollbar->SetThumbPos( pTextView->GetStartDocPos().Y() );
            SetScrollBarRanges();
        }
        else if( ( rTextHint.GetId() == TEXT_HINT_PARAINSERTED ) ||
                 ( rTextHint.GetId() == TEXT_HINT_PARACONTENTCHANGED ) )
        {
            DoDelayedSyntaxHighlight( (sal_uInt16)rTextHint.GetValue() );
        }
    }
}

void    SwSrcEditWindow::Invalidate(sal_uInt16 )
{
    pOutWin->Invalidate();
    Window::Invalidate();

}

void SwSrcEditWindow::Command( const CommandEvent& rCEvt )
{
    switch(rCEvt.GetCommand())
    {
        case COMMAND_WHEEL:
        case COMMAND_STARTAUTOSCROLL:
        case COMMAND_AUTOSCROLL:
        {
            const CommandWheelData* pWData = rCEvt.GetWheelData();
            if( !pWData || COMMAND_WHEEL_ZOOM != pWData->GetMode() )
                HandleScrollCommand( rCEvt, pHScrollbar, pVScrollbar );
        }
        break;
        default:
            Window::Command(rCEvt);
    }
}

void SwSrcEditWindow::HandleWheelCommand( const CommandEvent& rCEvt )
{
    pTextView->Command(rCEvt);
    HandleScrollCommand( rCEvt, pHScrollbar, pVScrollbar );
}

void SwSrcEditWindow::GetFocus()
{
    pOutWin->GrabFocus();
}

static sal_Bool  lcl_GetLanguagesForEncoding(rtl_TextEncoding eEnc, LanguageType aLanguages[])
{
    switch(eEnc)
    {
        case RTL_TEXTENCODING_UTF7             :
        case RTL_TEXTENCODING_UTF8             :
            // don#t fill - all LANGUAGE_SYSTEM means unicode font has to be used
        break;


        case RTL_TEXTENCODING_ISO_8859_3:
        case RTL_TEXTENCODING_ISO_8859_1  :
        case RTL_TEXTENCODING_MS_1252     :
        case RTL_TEXTENCODING_APPLE_ROMAN :
        case RTL_TEXTENCODING_IBM_850     :
        case RTL_TEXTENCODING_ISO_8859_14 :
        case RTL_TEXTENCODING_ISO_8859_15 :
            //fill with western languages
            aLanguages[0] = LANGUAGE_GERMAN;
            aLanguages[1] = LANGUAGE_FRENCH;
            aLanguages[2] = LANGUAGE_ITALIAN;
            aLanguages[3] = LANGUAGE_SPANISH;
        break;

        case RTL_TEXTENCODING_IBM_865     :
            //scandinavian
            aLanguages[0] = LANGUAGE_FINNISH;
            aLanguages[1] = LANGUAGE_NORWEGIAN;
            aLanguages[2] = LANGUAGE_SWEDISH;
            aLanguages[3] = LANGUAGE_DANISH;
        break;

        case RTL_TEXTENCODING_ISO_8859_10      :
        case RTL_TEXTENCODING_ISO_8859_13      :
        case RTL_TEXTENCODING_ISO_8859_2  :
        case RTL_TEXTENCODING_IBM_852     :
        case RTL_TEXTENCODING_MS_1250     :
        case RTL_TEXTENCODING_APPLE_CENTEURO   :
            aLanguages[0] = LANGUAGE_POLISH;
            aLanguages[1] = LANGUAGE_CZECH;
            aLanguages[2] = LANGUAGE_HUNGARIAN;
            aLanguages[3] = LANGUAGE_SLOVAK;
        break;

        case RTL_TEXTENCODING_ISO_8859_4  :
        case RTL_TEXTENCODING_IBM_775     :
        case RTL_TEXTENCODING_MS_1257          :
            aLanguages[0] = LANGUAGE_LATVIAN   ;
            aLanguages[1] = LANGUAGE_LITHUANIAN;
            aLanguages[2] = LANGUAGE_ESTONIAN  ;
        break;

        case RTL_TEXTENCODING_IBM_863       : aLanguages[0] = LANGUAGE_FRENCH_CANADIAN; break;
        case RTL_TEXTENCODING_APPLE_FARSI   : aLanguages[0] = LANGUAGE_FARSI; break;
        case RTL_TEXTENCODING_APPLE_ROMANIAN:aLanguages[0] = LANGUAGE_ROMANIAN; break;

        case RTL_TEXTENCODING_IBM_861     :
        case RTL_TEXTENCODING_APPLE_ICELAND    :
            aLanguages[0] = LANGUAGE_ICELANDIC;
        break;

        case RTL_TEXTENCODING_APPLE_CROATIAN:aLanguages[0] = LANGUAGE_CROATIAN; break;

        case RTL_TEXTENCODING_IBM_437     :
        case RTL_TEXTENCODING_ASCII_US    : aLanguages[0] = LANGUAGE_ENGLISH; break;

        case RTL_TEXTENCODING_IBM_862     :
        case RTL_TEXTENCODING_MS_1255     :
        case RTL_TEXTENCODING_APPLE_HEBREW     :
        case RTL_TEXTENCODING_ISO_8859_8  :
            aLanguages[0] = LANGUAGE_HEBREW;
        break;

        case RTL_TEXTENCODING_IBM_857     :
        case RTL_TEXTENCODING_MS_1254     :
        case RTL_TEXTENCODING_APPLE_TURKISH:
        case RTL_TEXTENCODING_ISO_8859_9  :
            aLanguages[0] = LANGUAGE_TURKISH;
        break;

        case RTL_TEXTENCODING_IBM_860     :
            aLanguages[0] = LANGUAGE_PORTUGUESE;
        break;

        case RTL_TEXTENCODING_IBM_869     :
        case RTL_TEXTENCODING_MS_1253     :
        case RTL_TEXTENCODING_APPLE_GREEK :
        case RTL_TEXTENCODING_ISO_8859_7  :
        case RTL_TEXTENCODING_IBM_737     :
            aLanguages[0] = LANGUAGE_GREEK;
        break;

        case RTL_TEXTENCODING_KOI8_R      :
        case RTL_TEXTENCODING_ISO_8859_5  :
        case RTL_TEXTENCODING_IBM_855     :
        case RTL_TEXTENCODING_MS_1251     :
        case RTL_TEXTENCODING_IBM_866     :
        case RTL_TEXTENCODING_APPLE_CYRILLIC   :
            aLanguages[0] = LANGUAGE_RUSSIAN;
        break;

        case RTL_TEXTENCODING_APPLE_UKRAINIAN:
        case RTL_TEXTENCODING_KOI8_U:
            aLanguages[0] = LANGUAGE_UKRAINIAN;
            break;

        case RTL_TEXTENCODING_IBM_864     :
        case RTL_TEXTENCODING_MS_1256          :
        case RTL_TEXTENCODING_ISO_8859_6  :
        case RTL_TEXTENCODING_APPLE_ARABIC :
            aLanguages[0] = LANGUAGE_ARABIC_SAUDI_ARABIA;
         break;

        case RTL_TEXTENCODING_APPLE_CHINTRAD   :
        case RTL_TEXTENCODING_MS_950           :
        case RTL_TEXTENCODING_GBT_12345        :
        case RTL_TEXTENCODING_BIG5             :
        case RTL_TEXTENCODING_EUC_TW           :
        case RTL_TEXTENCODING_BIG5_HKSCS       :
            aLanguages[0] = LANGUAGE_CHINESE_TRADITIONAL;
        break;

        case RTL_TEXTENCODING_EUC_JP           :
        case RTL_TEXTENCODING_ISO_2022_JP      :
        case RTL_TEXTENCODING_JIS_X_0201       :
        case RTL_TEXTENCODING_JIS_X_0208       :
        case RTL_TEXTENCODING_JIS_X_0212       :
        case RTL_TEXTENCODING_APPLE_JAPANESE   :
        case RTL_TEXTENCODING_MS_932           :
        case RTL_TEXTENCODING_SHIFT_JIS        :
            aLanguages[0] = LANGUAGE_JAPANESE;
        break;

        case RTL_TEXTENCODING_GB_2312          :
        case RTL_TEXTENCODING_MS_936           :
        case RTL_TEXTENCODING_GBK              :
        case RTL_TEXTENCODING_GB_18030         :
        case RTL_TEXTENCODING_APPLE_CHINSIMP   :
        case RTL_TEXTENCODING_EUC_CN           :
        case RTL_TEXTENCODING_ISO_2022_CN      :
            aLanguages[0] = LANGUAGE_CHINESE_SIMPLIFIED;
        break;

        case RTL_TEXTENCODING_APPLE_KOREAN     :
        case RTL_TEXTENCODING_MS_949           :
        case RTL_TEXTENCODING_EUC_KR           :
        case RTL_TEXTENCODING_ISO_2022_KR      :
        case RTL_TEXTENCODING_MS_1361          :
            aLanguages[0] = LANGUAGE_KOREAN;
        break;

        case RTL_TEXTENCODING_APPLE_THAI       :
        case RTL_TEXTENCODING_MS_874      :
        case RTL_TEXTENCODING_TIS_620          :
            aLanguages[0] = LANGUAGE_THAI;
        break;
        default: aLanguages[0] = Application::GetSettings().GetUILanguageTag().getLanguageType();
    }
    return aLanguages[0] != LANGUAGE_SYSTEM;
}
void SwSrcEditWindow::SetFont()
{
    rtl::OUString sFontName(
        officecfg::Office::Common::Font::SourceViewFont::FontName::get().
        get_value_or(rtl::OUString()));
    if(sFontName.isEmpty())
    {
        LanguageType aLanguages[5] =
        {
            LANGUAGE_SYSTEM, LANGUAGE_SYSTEM, LANGUAGE_SYSTEM, LANGUAGE_SYSTEM, LANGUAGE_SYSTEM
        };
        Font aFont;
        if(lcl_GetLanguagesForEncoding(eSourceEncoding, aLanguages))
        {
            //TODO: check for multiple languages
            aFont = OutputDevice::GetDefaultFont(DEFAULTFONT_FIXED, aLanguages[0], 0, this);
        }
        else
            aFont = OutputDevice::GetDefaultFont(DEFAULTFONT_SANS_UNICODE,
                        Application::GetSettings().GetLanguageTag().getLanguageType(), 0, this);
        sFontName = aFont.GetName();
    }
    const SvxFontListItem* pFontListItem =
        (const SvxFontListItem* )pSrcView->GetDocShell()->GetItem( SID_ATTR_CHAR_FONTLIST );
    const FontList*  pList = pFontListItem->GetFontList();
    FontInfo aInfo = pList->Get(sFontName,WEIGHT_NORMAL, ITALIC_NONE);

    const Font& rFont = GetTextEngine()->GetFont();
    Font aFont(aInfo);
    Size aSize(rFont.GetSize());
    //font height is stored in point and set in twip
    aSize.Height() =
        officecfg::Office::Common::Font::SourceViewFont::FontHeight::get() * 20;
    aFont.SetSize(pOutWin->LogicToPixel(aSize, MAP_TWIP));
    GetTextEngine()->SetFont( aFont );
    pOutWin->SetFont(aFont);
}

void SwSrcEditWindow::SetTextEncoding(rtl_TextEncoding eEncoding)
{
    eSourceEncoding = eEncoding;
    SetFont();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */