/**
* Adds a chunk to the stack
* The $index for less.php may be different from less.js since less.php does not chunkify inputs
*
* @param string $chunk
* @param string $fileInfo
* @param integer $index
* @param mixed $mapLines
*/
public function add($chunk, $fileInfo = null, $index = 0, $mapLines = null)
{
//ignore adding empty strings
if ($chunk === '') {
return;
}
$sourceLines = array();
$sourceColumns = ' ';
if ($fileInfo) {
$url = $fileInfo['currentUri'];
if (isset($this->contentsMap[$url])) {
$inputSource = substr($this->contentsMap[$url], 0, $index);
$sourceLines = explode("\n", $inputSource);
$sourceColumns = end($sourceLines);
} else {
throw new Exception('Filename ' . $url . ' not in contentsMap');
}
}
$lines = explode("\n", $chunk);
$columns = end($lines);
if ($fileInfo) {
if (!$mapLines) {
$this->generator->addMapping($this->lineNumber + 1, $this->column, count($sourceLines), strlen($sourceColumns), $fileInfo['currentUri']);
} else {
for ($i = 0, $count = count($lines); $i < $count; $i++) {
$this->generator->addMapping($this->lineNumber + $i + 1, $i === 0 ? $this->column : 0, count($sourceLines) + $i, $i === 0 ? strlen($sourceColumns) : 0, $fileInfo['currentUri']);
}
}
}
if (count($lines) === 1) {
$this->column += strlen($columns);
} else {
$this->lineNumber += count($lines) - 1;
$this->column = strlen($columns);
}
// add only chunk
parent::add($chunk);
}
