File indexing completed on 2023-05-30 09:03:10

 /*
     SPDX-License-Identifier: GPL-2.0-or-later
     SPDX-FileCopyrightText: 2009-2012 Alexander Rieder <alexanderrieder@gmail.com>
 */
 
 #include "maximasyntaxhelpobject.h"
 #include "maximakeywords.h"
 
 #include "maximasession.h"
 #include "maximaexpression.h"
 
 #include "result.h"
 
 #include <QDebug>
 
 MaximaSyntaxHelpObject::MaximaSyntaxHelpObject(const QString& cmd, MaximaSession* session) : Cantor::SyntaxHelpObject(cmd, session)
 {
     m_expression=nullptr;
 }
 
 void MaximaSyntaxHelpObject::fetchInformation()
 {
     bool isValid=false;
     for (const QString& func : MaximaKeywords::instance()->functions())
     {
         if(command()==func)
         {
             isValid=true;
             break;
         }
     }
 
     if(isValid)
     {
         if (session()->status() != Cantor::Session::Disable)
         {
             if (m_expression)
                 return;
 
             //use the lisp command, instead of directly calling the
             //maxima function "describe" to avoid generating a new
             //output label that would mess up history
             QString cmd=QLatin1String(":lisp(cl-info::info-exact \"%1\")");
 
             m_expression=session()->evaluateExpression(cmd.arg(command()), Cantor::Expression::FinishingBehavior::DoNotDelete, true);
 
             connect(m_expression, &Cantor::Expression::statusChanged, this, &MaximaSyntaxHelpObject::expressionChangedStatus);
         }
         else
             // We can't get function's detailed description, because session not login yet, so do nothing
             emit done();
 
     }else
     {
         qDebug()<<"invalid syntax request";
         emit done();
     }
 }
 
 void MaximaSyntaxHelpObject::expressionChangedStatus(Cantor::Expression::Status status)
 {
     switch(status)
     {
         case Cantor::Expression::Done:
         {
             qDebug()<<"expr done";
             QString text=m_expression->result()->data().toString();
             QStringList lines=text.split(QLatin1Char('\n'));
 
             QString syntax;
             for (QString line : lines)
             {
                 if(line.endsWith(QLatin1Char('\r')))
                     line.chop(1);
                 if(line.startsWith(QLatin1String("-- Function:")))
                 {
                     line.remove(QLatin1String("-- Function:"));
                     line.remove(QLatin1String("<br/>"));
                 }
                 syntax+=line;
                 qDebug() << "line: " << line;
             }
 
             setHtml(QLatin1String("<p style='white-space:pre'>")+syntax+QLatin1String("</p>"));
             emit done();
 
             m_expression->deleteLater();
             m_expression=nullptr;
             break;
         }
         case Cantor::Expression::Error:
         {
             qWarning() << "syntax object error" << m_expression->result()->toHtml();
             emit done();
 
             m_expression->deleteLater();
             m_expression=nullptr;
             break;
         }
         default:
             break;
     }
 }