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<?php
/**
*
* This file provides the part of lessphp API (https://github.com/leafo/lessphp)
* to be a drop-in replacement for following products:
* - Drupal 7, by the less module v3.0+ (https://drupal.org/project/less)
* - Symfony 2
*
*/
// Register autoloader for non-composer installations
if (!class_exists('Less_Parser')) {
require_once dirname(__FILE__).'/lib/Less/Autoloader.php';
Less_Autoloader::register();
}
class lessc{
static public $VERSION = Less_Version::less_version;
public $importDir = '';
protected $allParsedFiles = array();
protected $libFunctions = array();
protected $registeredVars = array();
private $formatterName;
public function __construct($lessc=null, $sourceName=null) {}
public function setImportDir($dirs) {
$this->importDir = (array)$dirs;
}
public function addImportDir($dir){
$this->importDir = (array)$this->importDir;
$this->importDir[] = $dir;
}
public function setFormatter($name)
{
$this->formatterName = $name;
}
public function setPreserveComments($preserve) {}
public function registerFunction($name, $func) {
$this->libFunctions[$name] = $func;
}
public function unregisterFunction($name) {
unset($this->libFunctions[$name]);
}
public function setVariables($variables){
foreach( $variables as $name => $value ){
$this->setVariable( $name, $value );
}
}
public function setVariable($name, $value){
$this->registeredVars[$name] = $value;
}
public function unsetVariable($name){
unset( $this->registeredVars[$name] );
}
public function parse($buffer, $presets = array()){
$this->setVariables($presets);
$parser = new Less_Parser($this->getOptions());
$parser->setImportDirs($this->getImportDirs());
if( count( $this->registeredVars ) ) $parser->ModifyVars( $this->registeredVars );
foreach ($this->libFunctions as $name => $func) {
$parser->registerFunction($name, $func);
}
$parser->parse($buffer);
return $parser->getCss();
}
protected function getOptions(){
$options = array();
switch($this->formatterName){
case 'compressed':
$options['compress'] = true;
break;
}
return $options;
}
protected function getImportDirs(){
$dirs_ = (array)$this->importDir;
$dirs = array();
foreach($dirs_ as $dir) {
$dirs[$dir] = '';
}
return $dirs;
}
public function compile($string, $name = null){
$oldImport = $this->importDir;
$this->importDir = (array)$this->importDir;
$this->allParsedFiles = array();
$parser = new Less_Parser($this->getOptions());
$parser->SetImportDirs($this->getImportDirs());
if( count( $this->registeredVars ) ){
$parser->ModifyVars( $this->registeredVars );
}
foreach ($this->libFunctions as $name => $func) {
$parser->registerFunction($name, $func);
}
$parser->parse($string);
$out = $parser->getCss();
$parsed = Less_Parser::AllParsedFiles();
foreach( $parsed as $file ){
$this->addParsedFile($file);
}
$this->importDir = $oldImport;
return $out;
}
public function compileFile($fname, $outFname = null) {
if (!is_readable($fname)) {
throw new Exception('load error: failed to find '.$fname);
}
$pi = pathinfo($fname);
$oldImport = $this->importDir;
$this->importDir = (array)$this->importDir;
$this->importDir[] = realpath($pi['dirname']).'/';
$this->allParsedFiles = array();
$this->addParsedFile($fname);
$parser = new Less_Parser($this->getOptions());
$parser->SetImportDirs($this->getImportDirs());
if( count( $this->registeredVars ) ) $parser->ModifyVars( $this->registeredVars );
foreach ($this->libFunctions as $name => $func) {
$parser->registerFunction($name, $func);
}
$parser->parseFile($fname);
$out = $parser->getCss();
$parsed = Less_Parser::AllParsedFiles();
foreach ($parsed as $file) {
$this->addParsedFile($file);
}
$this->importDir = $oldImport;
if ($outFname !== null) {
return file_put_contents($outFname, $out);
}
return $out;
}
public function checkedCompile($in, $out) {
if (!is_file($out) || filemtime($in) > filemtime($out)) {
$this->compileFile($in, $out);
return true;
}
return false;
}
/**
* Execute lessphp on a .less file or a lessphp cache structure
*
* The lessphp cache structure contains information about a specific
* less file having been parsed. It can be used as a hint for future
* calls to determine whether or not a rebuild is required.
*
* The cache structure contains two important keys that may be used
* externally:
*
* compiled: The final compiled CSS
* updated: The time (in seconds) the CSS was last compiled
*
* The cache structure is a plain-ol' PHP associative array and can
* be serialized and unserialized without a hitch.
*
* @param mixed $in Input
* @param bool $force Force rebuild?
* @return array lessphp cache structure
*/
public function cachedCompile($in, $force = false) {
// assume no root
$root = null;
if (is_string($in)) {
$root = $in;
} elseif (is_array($in) and isset($in['root'])) {
if ($force or ! isset($in['files'])) {
// If we are forcing a recompile or if for some reason the
// structure does not contain any file information we should
// specify the root to trigger a rebuild.
$root = $in['root'];
} elseif (isset($in['files']) and is_array($in['files'])) {
foreach ($in['files'] as $fname => $ftime ) {
if (!file_exists($fname) or filemtime($fname) > $ftime) {
// One of the files we knew about previously has changed
// so we should look at our incoming root again.
$root = $in['root'];
break;
}
}
}
} else {
// TODO: Throw an exception? We got neither a string nor something
// that looks like a compatible lessphp cache structure.
return null;
}
if ($root !== null) {
// If we have a root value which means we should rebuild.
$out = array();
$out['root'] = $root;
$out['compiled'] = $this->compileFile($root);
$out['files'] = $this->allParsedFiles();
$out['updated'] = time();
return $out;
} else {
// No changes, pass back the structure
// we were given initially.
return $in;
}
}
public function ccompile( $in, $out, $less = null) {
if ($less === null) {
$less = new self;
}
return $less->checkedCompile($in, $out);
}
public static function cexecute($in, $force = false, $less = null) {
if ($less === null) {
$less = new self;
}
return $less->cachedCompile($in, $force);
}
public function allParsedFiles() {
return $this->allParsedFiles;
}
protected function addParsedFile($file) {
$this->allParsedFiles[realpath($file)] = filemtime($file);
}
}
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