File indexing completed on 2024-12-01 09:37:32

 /*
     SPDX-License-Identifier: GPL-2.0-or-later
     SPDX-FileCopyrightText: 2012 Filipe Saraiva <filipe@kde.org>
 */
 
 #include "pythonexpression.h"
 
 #include <config-cantorlib.h>
 
 #include "textresult.h"
 #include "imageresult.h"
 #include "helpresult.h"
 #include "session.h"
 #include "settings.h"
 
 #include <QDebug>
 #include <QDir>
 #include <QTemporaryFile>
 #include <QFileSystemWatcher>
 
 #include "pythonsession.h"
 
 PythonExpression::PythonExpression(Cantor::Session* session, bool internal) : Cantor::Expression(session, internal)
 {
 }
 
 PythonExpression::~PythonExpression() {
     delete m_tempFile;
 }
 
 void PythonExpression::evaluate()
 {
     if(m_tempFile) {
         delete m_tempFile;
         m_tempFile = nullptr;
     }
 
     session()->enqueueExpression(this);
 }
 
 QString PythonExpression::internalCommand()
 {
     QString cmd = command();
 
     // handle matplotlib's show() command
     if((PythonSettings::integratePlots()) && (command().contains(QLatin1String("show()"))))
     {
         QString extension;
         if (PythonSettings::inlinePlotFormat() == 0)
             extension = QLatin1String("pdf");
         else if (PythonSettings::inlinePlotFormat() == 1)
             extension = QLatin1String("svg");
         else if (PythonSettings::inlinePlotFormat() == 2)
             extension = QLatin1String("png");
 
         m_tempFile = new QTemporaryFile(QDir::tempPath() + QLatin1String("/cantor_python-XXXXXX.%1").arg(extension));
         m_tempFile->open();
         QString saveFigCommand = QLatin1String("savefig('%1')");
         cmd.replace(QLatin1String("show()"), saveFigCommand.arg(m_tempFile->fileName()));
 
         // set the plot size in inches
         // TODO: matplotlib is usually imported via "import matplotlib.pyplot as plt" and we set
         // plot size for plt below but it's still possible to name the module differently and we
         // somehow need to handle such cases, too.
         const double w = PythonSettings::plotWidth() / 2.54;
         const double h = PythonSettings::plotHeight() / 2.54;
         cmd += QLatin1String("\nplt.figure(figsize=(%1, %2))").arg(QString::number(w), QString::number(h));
 
         QFileSystemWatcher* watcher = fileWatcher();
         watcher->removePaths(watcher->files());
         watcher->addPath(m_tempFile->fileName());
         connect(watcher, &QFileSystemWatcher::fileChanged, this, &PythonExpression::imageChanged,  Qt::UniqueConnection);
     }
     // TODO: handle other plotting frameworks
 
     QStringList commandLine = cmd.split(QLatin1String("\n"));
     QString commandProcessing;
 
     for(const QString& command : commandLine)
     {
         const QString firstLineWord = command.trimmed().replace(QLatin1String("("), QLatin1String(" "))
             .split(QLatin1String(" ")).at(0);
 
         // Ignore comments
         if (firstLineWord.length() != 0 && firstLineWord[0] == QLatin1Char('#')){
             commandProcessing += command + QLatin1String("\n");
             continue;
         }
 
         if(firstLineWord.contains(QLatin1String("execfile"))){
             commandProcessing += command;
             continue;
         }
 
         commandProcessing += command + QLatin1String("\n");
     }
 
     return commandProcessing;
 }
 
 void PythonExpression::parseOutput(const QString& output)
 {
     qDebug() << "expression output: " << output;
     if(command().simplified().startsWith(QLatin1String("help(")))
     {
         QString resultStr = output;
         setResult(new Cantor::HelpResult(resultStr.remove(output.lastIndexOf(QLatin1String("None")), 4)));
     } else {
         if (!output.isEmpty())
             addResult(new Cantor::TextResult(output));
      }
 
     setStatus(Cantor::Expression::Done);
 }
 
 void PythonExpression::parseError(const QString& error)
 {
     qDebug() << "expression error: " << error;
     setErrorMessage(error);
 
     setStatus(Cantor::Expression::Error);
 }
 
 void PythonExpression::parseWarning(const QString& warning)
 {
     if (!warning.isEmpty())
     {
         auto* result = new Cantor::TextResult(warning);
         result->setStdErr(true);
         addResult(result);
     }
 }
 
 void PythonExpression::imageChanged()
 {
     if(m_tempFile->size() <= 0)
         return;
 
     auto* newResult = new Cantor::ImageResult(QUrl::fromLocalFile(m_tempFile->fileName()));
     if (result() == nullptr)
         setResult(newResult);
     else
     {
         bool found = false;
         for (int i = 0; i < results().size(); i++)
             if (results()[i]->type() == newResult->type())
             {
                 replaceResult(i, newResult);
                 found = true;
             }
         if (!found)
             addResult(newResult);
     }
     setStatus(Done);
 }