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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 __DIR__ . '/lib/Less/Autoloader.php';
Less_Autoloader::register();
}
class lessc {
public static $VERSION = Less_Version::less_version;
public $importDir = '';
protected $allParsedFiles = [];
protected $libFunctions = [];
protected $registeredVars = [];
private $formatterName;
private $options = [];
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 setOptions( $options ) {
foreach ( $options as $name => $value ) {
$this->setOption( $name, $value );
}
}
public function setOption( $name, $value ) {
$this->options[$name] = $value;
}
public function parse( $buffer, $presets = [] ) {
$this->setVariables( $presets );
$parser = new Less_Parser( $this->getOptions() );
$parser->setImportDirs( $this->getImportDirs() );
foreach ( $this->libFunctions as $name => $func ) {
$parser->registerFunction( $name, $func );
}
$parser->parse( $buffer );
if ( count( $this->registeredVars ) ) {
$parser->ModifyVars( $this->registeredVars );
}
return $parser->getCss();
}
protected function getOptions() {
$options = [ 'relativeUrls' => false ];
switch ( $this->formatterName ) {
case 'compressed':
$options['compress'] = true;
break;
}
if ( is_array( $this->options ) ) {
$options = array_merge( $options, $this->options );
}
return $options;
}
protected function getImportDirs() {
$dirs_ = (array)$this->importDir;
$dirs = [];
foreach ( $dirs_ as $dir ) {
$dirs[$dir] = '';
}
return $dirs;
}
public function compile( $string, $name = null ) {
$oldImport = $this->importDir;
$this->importDir = (array)$this->importDir;
$this->allParsedFiles = [];
$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[] = Less_Parser::AbsPath( $pi['dirname'] ) . '/';
$this->allParsedFiles = [];
$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 = [];
$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[Less_Parser::AbsPath( $file )] = filemtime( $file );
}
}