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Environment.php
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Environment.php
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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 array */
public $importantScope = [];
public $inCalc = false;
public $mathOn = true;
private $calcStack = [];
/** @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 $tabLevel = 0;
public static $lastRule = false;
public static $_noSpaceCombinators;
public static $mixin_stack = 0;
public $math = self::MATH_PARENS_DIVISION;
public $importCallback = null;
public $parensStack = [];
public const MATH_ALWAYS = 0;
public const MATH_PARENS_DIVISION = 1;
public const MATH_PARENS = 2;
/**
* @var array
*/
public $functions = [];
public function Init() {
self::$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->importantScope = $this->importantScope;
$new_env->math = $this->math;
return $new_env;
}
/**
* @return bool
* @see less-3.13.1.js#Eval.prototype.isMathOn
*/
public function isMathOn( $op = "" ) {
if ( !$this->mathOn ) {
return false;
}
if ( $op === '/' && $this->math !== $this::MATH_ALWAYS && !$this->parensStack ) {
return false;
}
if ( $this->math > $this::MATH_PARENS_DIVISION ) {
return (bool)$this->parensStack;
}
return true;
}
/**
* @see less-3.13.1.js#Eval.prototype.inParenthesis
*/
public function inParenthesis() {
// Optimization: We don't need undefined/null, always have an array
$this->parensStack[] = true;
}
/**
* @see less-3.13.1.js#Eval.prototype.inParenthesis
*/
public function outOfParenthesis() {
array_pop( $this->parensStack );
}
/**
* @param string $path
* @return bool
* @see less-2.5.3.js#Eval.isPathRelative
*/
public static function isPathRelative( $path ) {
return !preg_match( '/^(?:[a-z-]+:|\/|#)/', $path );
}
public function enterCalc() {
$this->calcStack[] = true;
$this->inCalc = true;
}
public function exitCalc() {
array_pop( $this->calcStack );
if ( !$this->calcStack ) {
$this->inCalc = false;
}
}
/**
* 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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