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#include "latexprocess.h"
#include "tikzit.h"
#include <QDebug>
#include <QStandardPaths>
#include <QTemporaryDir>
LatexProcess::LatexProcess(PreviewWindow *preview, QObject *parent) : QObject(parent)
{
_preview = preview;
_output = preview->outputTextEdit();
_proc = new QProcess(this);
_proc->setProcessChannelMode(QProcess::MergedChannels);
_proc->setWorkingDirectory(_workingDir.path());
connect(_proc, SIGNAL(readyReadStandardOutput()), this, SLOT(readyReadStandardOutput()));
connect(_proc, SIGNAL(finished(int)), this, SLOT(finished(int)));
// for debug purposes
// _workingDir.setAutoRemove(false);
}
void LatexProcess::makePreview(QString tikz)
{
_output->clear();
if (!_workingDir.isValid()) {
_output->appendPlainText("COULD NOT WRITE TO TEMP DIR: " + _workingDir.path() + "\n");
return;
}
_output->appendPlainText("USING TEMP DIR: " + _workingDir.path() + "\n");
_output->appendPlainText("SEARCHING FOR pdflatex IN:");
_output->appendPlainText(qgetenv("PATH"));
_output->appendPlainText("\n");
QString pdflatex = QStandardPaths::findExecutable("pdflatex");
if (pdflatex.isEmpty()) {
_output->appendPlainText("pdflatex NOT FOUND, ABORTING.\n");
return;
}
_output->appendPlainText("FOUND: " + pdflatex + "\n");
// copy active *.tikzstyles file to preview dir
if (!tikzit->styleFile().isEmpty() && QFile::exists(tikzit->styleFilePath())) {
QFile::copy(tikzit->styleFilePath(), _workingDir.path() + "/" + tikzit->styleFile());
}
// copy tikzit.sty to preview dir
QFile::copy(":/tex/sample/tikzit.sty", _workingDir.path() + "/tikzit.sty");
// write out the file containing the tikz picture
QFile f(_workingDir.path() + "/preview.tex");
f.open(QIODevice::WriteOnly);
QTextStream tex(&f);
tex << "\\documentclass{article}\n";
tex << "\\usepackage{tikzit}\n";
tex << "\\usepackage[graphics,active,tightpage]{preview}\n";
tex << "\\PreviewEnvironment{tikzpicture}\n";
tex << "\\input{" + tikzit->styleFile() + "}\n";
tex << "\\begin{document}\n\n";
tex << tikz;
tex << "\n\n\\end{document}\n";
f.close();
_proc->start(pdflatex, QStringList() << "preview.tex");
}
void LatexProcess::kill()
{
if (_proc->state() == QProcess::Running) _proc->kill();
}
void LatexProcess::readyReadStandardOutput()
{
QByteArray s = _proc->readAllStandardOutput();
_output->appendPlainText(s);
}
void LatexProcess::finished(int exitCode)
{
QByteArray s = _proc->readAllStandardOutput();
_output->appendPlainText(s);
if (exitCode == 0) {
QString pdf = _workingDir.path() + "/preview.pdf";
_output->appendPlainText("\n\nSUCCESSFULLY GENERATED: " + pdf + "\n");
_preview->setPdf(pdf);
emit previewFinished();
} else {
_output->appendPlainText("\n\npdflatex RETURNED AN ERROR\n");
emit previewFinished();
}
}
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