source: ogBrowser-Git/qtermwidget/src/TerminalCharacterDecoder.cpp

/*
    This file is part of Konsole, an X terminal.
    
    Copyright (C) 2006 by Robert Knight <robertknight@gmail.com>
    
    Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301  USA.
*/

// Own
#include "TerminalCharacterDecoder.h"

// Qt
#include <QtCore/QTextStream>


using namespace Konsole;

PlainTextDecoder::PlainTextDecoder()
 : _output(0)
 , _includeTrailingWhitespace(true)
{

}
void PlainTextDecoder::setTrailingWhitespace(bool enable)
{
    _includeTrailingWhitespace = enable;
}
bool PlainTextDecoder::trailingWhitespace() const
{
    return _includeTrailingWhitespace;
}
void PlainTextDecoder::begin(QTextStream* output)
{
   _output = output; 
}
void PlainTextDecoder::end()
{
    _output = 0;
}
void PlainTextDecoder::decodeLine(const Character* const characters, int count, LineProperty /*properties*/
                                                         )
{
    Q_ASSERT( _output );

        //TODO should we ignore or respect the LINE_WRAPPED line property?

        //note:  we build up a QString and send it to the text stream rather writing into the text
        //stream a character at a time because it is more efficient.
        //(since QTextStream always deals with QStrings internally anyway)
        QString plainText;
        plainText.reserve(count);
   
    int outputCount = count;

    // if inclusion of trailing whitespace is disabled then find the end of the
    // line
    if ( !_includeTrailingWhitespace )
    {
        for (int i = count-1 ; i >= 0 ; i--)
        {
            if ( characters[i].character != ' '  )
                break;
            else
                outputCount--;
        }
    }

        for (int i=0;i<outputCount;i++)
        {
                plainText.append( QChar(characters[i].character) );
        }

        *_output << plainText;
}

HTMLDecoder::HTMLDecoder() :
        _output(0)
           ,_colorTable(base_color_table)
       ,_innerSpanOpen(false)
       ,_lastRendition(DEFAULT_RENDITION)
{
        
}

void HTMLDecoder::begin(QTextStream* output)
{
    _output = output;

    QString text;

        //open monospace span
    openSpan(text,"font-family:monospace");

    *output << text;
}

void HTMLDecoder::end()
{
    Q_ASSERT( _output );

    QString text;

    closeSpan(text);

    *_output << text;

    _output = 0;

}

//TODO: Support for LineProperty (mainly double width , double height)
void HTMLDecoder::decodeLine(const Character* const characters, int count, LineProperty /*properties*/
                                                        )
{
    Q_ASSERT( _output );

        QString text;

        int spaceCount = 0;
                
        for (int i=0;i<count;i++)
        {
                QChar ch(characters[i].character);

                //check if appearance of character is different from previous char
                if ( characters[i].rendition != _lastRendition  ||
                     characters[i].foregroundColor != _lastForeColor  ||
                         characters[i].backgroundColor != _lastBackColor )
                {
                        if ( _innerSpanOpen )
                                        closeSpan(text);

                        _lastRendition = characters[i].rendition;
                        _lastForeColor = characters[i].foregroundColor;
                        _lastBackColor = characters[i].backgroundColor;
                        
                        //build up style string
                        QString style;

                        if ( _lastRendition & RE_BOLD ||
                             (_colorTable && characters[i].isBold(_colorTable)) )
                                        style.append("font-weight:bold;");


                        if ( _lastRendition & RE_UNDERLINE )
                                        style.append("font-decoration:underline;");
                
                        //colours - a colour table must have been defined first
                        if ( _colorTable )      
                        {
                                style.append( QString("color:%1;").arg(_lastForeColor.color(_colorTable).name() ) );

                                if (!characters[i].isTransparent(_colorTable))
                                {
                                        style.append( QString("background-color:%1;").arg(_lastBackColor.color(_colorTable).name() ) );
                                }
                        }
                
                        //open the span with the current style  
                        openSpan(text,style);
                        _innerSpanOpen = true;
                }

                //handle whitespace
                if (ch.isSpace())
                        spaceCount++;
                else
                        spaceCount = 0;
                

                //output current character
                if (spaceCount < 2)
                {
                        //escape HTML tag characters and just display others as they are
                        if ( ch == '<' )
                                text.append("&lt;");
                        else if (ch == '>')
                                        text.append("&gt;");
                        else    
                                        text.append(ch);
                }
                else
                {
                        text.append("&nbsp;"); //HTML truncates multiple spaces, so use a space marker instead
                }
                
        }

        //close any remaining open inner spans
        if ( _innerSpanOpen )
                closeSpan(text);

        //start new line
        text.append("<br>");
        
        *_output << text;
}

void HTMLDecoder::openSpan(QString& text , const QString& style)
{
        text.append( QString("<span style=\"%1\">").arg(style) );
}

void HTMLDecoder::closeSpan(QString& text)
{
        text.append("</span>");
}

void HTMLDecoder::setColorTable(const ColorEntry* table)
{
        _colorTable = table;
}