/**
* Handles view events for latex files
*
* @param \Hubzero\Filesystem\Collection $collection The file collection to view
* @return void
**/
public function onHandleView(\Hubzero\Filesystem\Collection $collection)
{
if (!$this->canHandle($collection)) {
return false;
}
$file = $collection->findFirstWithExtension('tex');
// Create view
$view = new \Hubzero\Plugin\View(['folder' => 'handlers', 'element' => 'latex', 'name' => 'latex', 'layout' => 'view']);
// Build path for storing temp previews
$outputDir = PATH_APP . DS . trim($this->params->get('compile_dir', 'site/latex/compiled'), DS);
$adapter = Manager::adapter('local', ['path' => $outputDir]);
$uniqid = md5(uniqid());
$temp = File::fromPath($uniqid . '.tex', $adapter);
// Clean up data from Windows characters - important!
$data = preg_replace('/[^(\\x20-\\x7F)\\x0A]*/', '', $file->read());
// Store file locally
$temp->write($data);
// Build the command
$command = DS . trim($this->params->get('texpath', '/usr/bin/pdflatex'), DS);
$command .= ' -output-directory=' . $outputDir . ' -interaction=batchmode ' . escapeshellarg($temp->getAbsolutePath());
// Exec and capture output
exec($command, $out);
$compiled = File::fromPath($uniqid . '.pdf', $adapter);
$log = File::fromPath($uniqid . '.log', $adapter);
if (!$compiled->size()) {
$view->setError(Lang::txt('PLG_HANDLERS_LATEX_ERROR_COMPILE_TEX_FAILED'));
}
// Read log (to show in case of error)
if ($log->size()) {
$view->log = $log->read();
}
$view->compiled = $compiled;
return $view;
}
