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<?php
/**
* @private
*/
class Less_Environment {
/**
* Information about the current file - for error reporting and importing and making urls relative etc.
*
* - rootpath: rootpath to append to URLs
*
* @var array|null
*/
public $currentFileInfo;
/** @var bool Whether we are currently importing multiple copies */
public $importMultiple = false;
/**
* @var array
*/
public $frames = [];
/** @var Less_Tree_Media[] */
public $mediaBlocks = [];
/** @var Less_Tree_Media[] */
public $mediaPath = [];
/** @var string[] */
public $imports = [];
/**
* This is the equivalent of `importVisitor.onceFileDetectionMap`
* as used by the dynamic `importNode.skip` function.
*
* @see less-2.5.3.js#ImportVisitor.prototype.onImported
* @var array<string,true>
*/
public $importVisitorOnceMap = [];
public static $parensStack = 0;
public static $tabLevel = 0;
public static $lastRule = false;
public static $_noSpaceCombinators;
public static $mixin_stack = 0;
public $strictMath = false;
public $importCallback = null;
/**
* @var array
*/
public $functions = [];
public function Init() {
self::$parensStack = 0;
self::$tabLevel = 0;
self::$lastRule = false;
self::$mixin_stack = 0;
self::$_noSpaceCombinators = [
'' => true,
' ' => true,
'|' => true
];
}
/**
* @param string $file
* @return void
*/
public function addParsedFile( $file ) {
$this->imports[] = $file;
}
public function clone() {
$new_env = clone $this;
// NOTE: Match JavaScript by-ref behaviour for arrays
$new_env->imports =& $this->imports;
$new_env->importVisitorOnceMap =& $this->importVisitorOnceMap;
return $new_env;
}
/**
* @param string $file
* @return bool
*/
public function isFileParsed( $file ) {
return in_array( $file, $this->imports );
}
public function copyEvalEnv( $frames = [] ) {
$new_env = new self();
$new_env->frames = $frames;
$new_env->strictMath = $this->strictMath;
return $new_env;
}
/**
* @return bool
* @see Eval.prototype.isMathOn in less.js 3.0.0 https://github.com/less/less.js/blob/v3.0.0/dist/less.js#L1007
*/
public function isMathOn() {
return $this->strictMath ? (bool)self::$parensStack : true;
}
/**
* @param string $path
* @return bool
* @see less-2.5.3.js#Eval.isPathRelative
*/
public static function isPathRelative( $path ) {
return !preg_match( '/^(?:[a-z-]+:|\/|#)/', $path );
}
/**
* Apply legacy 'import_callback' option.
*
* See Less_Parser::$default_options to learn more about the 'import_callback' option.
* This option is deprecated in favour of Less_Parser::SetImportDirs.
*
* @param Less_Tree_Import $importNode
* @return array{0:string,1:string|null}|null Array containing path and (optional) uri or null
*/
public function callImportCallback( Less_Tree_Import $importNode ) {
if ( is_callable( $this->importCallback ) ) {
return ( $this->importCallback )( $importNode );
}
}
/**
* Canonicalize a path by resolving references to '/./', '/../'
* Does not remove leading "../"
* @param string $path or url
* @return string Canonicalized path
*/
public static function normalizePath( $path ) {
$segments = explode( '/', $path );
$segments = array_reverse( $segments );
$path = [];
$path_len = 0;
while ( $segments ) {
$segment = array_pop( $segments );
switch ( $segment ) {
case '.':
break;
case '..':
// @phan-suppress-next-line PhanTypeInvalidDimOffset False positive
if ( !$path_len || ( $path[$path_len - 1] === '..' ) ) {
$path[] = $segment;
$path_len++;
} else {
array_pop( $path );
$path_len--;
}
break;
default:
$path[] = $segment;
$path_len++;
break;
}
}
return implode( '/', $path );
}
public function unshiftFrame( $frame ) {
array_unshift( $this->frames, $frame );
}
public function shiftFrame() {
return array_shift( $this->frames );
}
}
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