.
*/
require_once 'phing/filters/BaseParamFilterReader.php';
require_once 'phing/filters/ChainableReader.php';
/**
* Converts tabs to spaces.
*
* Example:
*
*
*
* Or:
*
*
*
*
*
* @author Yannick Lecaillez
* @author Hans Lellelid
* @version $Revision: 1.9 $
* @see BaseParamFilterReader
* @package phing.filters
*/
class TabToSpaces extends BaseParamFilterReader implements ChainableReader {
/**
* The default tab length.
* @var int
*/
const DEFAULT_TAB_LENGTH = 8;
/**
* Parameter name for the length of a tab.
* @var string
*/
const TAB_LENGTH_KEY = "tablength";
/**
* Tab length in this filter.
* @var int
*/
private $tabLength = 8; //self::DEFAULT_TAB_LENGTH;
/**
* Returns stream after converting tabs to the specified number of spaces.
*
* @return the resulting stream, or -1
* if the end of the resulting stream has been reached
*
* @exception IOException if the underlying stream throws an IOException
* during reading
*/
function read($len = null) {
if ( !$this->getInitialized() ) {
$this->_initialize();
$this->setInitialized(true);
}
$buffer = $this->in->read($len);
if($buffer === -1) {
return -1;
}
$buffer = str_replace("\t", str_repeat(' ', $this->tabLength), $buffer);
return $buffer;
}
/**
* Sets the tab length.
*
* @param int $tabLength The number of spaces to be used when converting a tab.
*/
function setTablength($tabLength) {
$this->tabLength = (int) $tabLength;
}
/**
* Returns the tab length.
*
* @return int The number of spaces used when converting a tab
*/
function getTablength() {
return $this->tabLength;
}
/**
* Creates a new TabsToSpaces using the passed in
* Reader for instantiation.
*
* @param Reader $reader A Reader object providing the underlying stream.
* Must not be null.
*
* @return Reader A new filter based on this configuration, but filtering
* the specified reader
*/
function chain(Reader $reader) {
$newFilter = new TabToSpaces($reader);
$newFilter->setTablength($this->getTablength());
$newFilter->setInitialized(true);
$newFilter->setProject($this->getProject());
return $newFilter;
}
/**
* Parses the parameters to set the tab length.
*/
private function _initialize() {
$params = $this->getParameters();
if ( $params !== null ) {
for($i = 0 ; $igetName()) {
$this->tabLength = $params[$i]->getValue();
break;
}
}
}
}
}
?>