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| 1 | <?php |
| 2 | /** |
| 3 | * @private |
| 4 | */ |
| 5 | class Less_Environment { |
| 6 | |
| 7 | /** |
| 8 | * Information about the current file - for error reporting and importing and making urls relative etc. |
| 9 | * |
| 10 | * - rootpath: rootpath to append to URLs |
| 11 | * |
| 12 | * @var array|null |
| 13 | */ |
| 14 | public $currentFileInfo; |
| 15 | |
| 16 | /** @var bool Whether we are currently importing multiple copies */ |
| 17 | public $importMultiple = false; |
| 18 | |
| 19 | /** |
| 20 | * @var array |
| 21 | */ |
| 22 | public $frames = []; |
| 23 | /** @var array */ |
| 24 | public $importantScope = []; |
| 25 | public $inCalc = false; |
| 26 | public $mathOn = true; |
| 27 | |
| 28 | private $calcStack = []; |
| 29 | |
| 30 | /** @var Less_Tree_Media[] */ |
| 31 | public $mediaBlocks = []; |
| 32 | /** @var Less_Tree_Media[] */ |
| 33 | public $mediaPath = []; |
| 34 | |
| 35 | /** @var string[] */ |
| 36 | public $imports = []; |
| 37 | |
| 38 | /** |
| 39 | * This is the equivalent of `importVisitor.onceFileDetectionMap` |
| 40 | * as used by the dynamic `importNode.skip` function. |
| 41 | * |
| 42 | * @see less-2.5.3.js#ImportVisitor.prototype.onImported |
| 43 | * @var array<string,true> |
| 44 | */ |
| 45 | public $importVisitorOnceMap = []; |
| 46 | |
| 47 | public static $tabLevel = 0; |
| 48 | |
| 49 | public static $lastRule = false; |
| 50 | |
| 51 | public static $_noSpaceCombinators; |
| 52 | |
| 53 | public static $mixin_stack = 0; |
| 54 | |
| 55 | public $math = self::MATH_PARENS_DIVISION; |
| 56 | |
| 57 | public $importCallback = null; |
| 58 | |
| 59 | public $parensStack = []; |
| 60 | |
| 61 | public const MATH_ALWAYS = 0; |
| 62 | public const MATH_PARENS_DIVISION = 1; |
| 63 | public const MATH_PARENS = 2; |
| 64 | |
| 65 | /** |
| 66 | * @var array |
| 67 | */ |
| 68 | public $functions = []; |
| 69 | |
| 70 | public function Init() { |
| 71 | self::$tabLevel = 0; |
| 72 | self::$lastRule = false; |
| 73 | self::$mixin_stack = 0; |
| 74 | |
| 75 | self::$_noSpaceCombinators = [ |
| 76 | '' => true, |
| 77 | ' ' => true, |
| 78 | '|' => true |
| 79 | ]; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * @param string $file |
| 84 | * @return void |
| 85 | */ |
| 86 | public function addParsedFile( $file ) { |
| 87 | $this->imports[] = $file; |
| 88 | } |
| 89 | |
| 90 | public function clone() { |
| 91 | $new_env = clone $this; |
| 92 | // NOTE: Match JavaScript by-ref behaviour for arrays |
| 93 | $new_env->imports =& $this->imports; |
| 94 | $new_env->importVisitorOnceMap =& $this->importVisitorOnceMap; |
| 95 | return $new_env; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * @param string $file |
| 100 | * @return bool |
| 101 | */ |
| 102 | public function isFileParsed( $file ) { |
| 103 | return in_array( $file, $this->imports ); |
| 104 | } |
| 105 | |
| 106 | public function copyEvalEnv( $frames = [] ) { |
| 107 | $new_env = new self(); |
| 108 | $new_env->frames = $frames; |
| 109 | $new_env->importantScope = $this->importantScope; |
| 110 | $new_env->math = $this->math; |
| 111 | return $new_env; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * @return bool |
| 116 | * @see less-3.13.1.js#Eval.prototype.isMathOn |
| 117 | */ |
| 118 | public function isMathOn( $op = "" ) { |
| 119 | if ( !$this->mathOn ) { |
| 120 | return false; |
| 121 | } |
| 122 | if ( $op === '/' && $this->math !== $this::MATH_ALWAYS && !$this->parensStack ) { |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | if ( $this->math > $this::MATH_PARENS_DIVISION ) { |
| 127 | return (bool)$this->parensStack; |
| 128 | } |
| 129 | return true; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * @see less-3.13.1.js#Eval.prototype.inParenthesis |
| 134 | */ |
| 135 | public function inParenthesis() { |
| 136 | // Optimization: We don't need undefined/null, always have an array |
| 137 | $this->parensStack[] = true; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * @see less-3.13.1.js#Eval.prototype.inParenthesis |
| 142 | */ |
| 143 | public function outOfParenthesis() { |
| 144 | array_pop( $this->parensStack ); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * @param string $path |
| 149 | * @return bool |
| 150 | * @see less-2.5.3.js#Eval.isPathRelative |
| 151 | */ |
| 152 | public static function isPathRelative( $path ) { |
| 153 | return !preg_match( '/^(?:[a-z-]+:|\/|#)/', $path ); |
| 154 | } |
| 155 | |
| 156 | public function enterCalc() { |
| 157 | $this->calcStack[] = true; |
| 158 | $this->inCalc = true; |
| 159 | } |
| 160 | |
| 161 | public function exitCalc() { |
| 162 | array_pop( $this->calcStack ); |
| 163 | if ( !$this->calcStack ) { |
| 164 | $this->inCalc = false; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Canonicalize a path by resolving references to '/./', '/../' |
| 170 | * Does not remove leading "../" |
| 171 | * @param string $path or url |
| 172 | * @return string Canonicalized path |
| 173 | */ |
| 174 | public static function normalizePath( $path ) { |
| 175 | $segments = explode( '/', $path ); |
| 176 | $segments = array_reverse( $segments ); |
| 177 | |
| 178 | $path = []; |
| 179 | $path_len = 0; |
| 180 | |
| 181 | while ( $segments ) { |
| 182 | $segment = array_pop( $segments ); |
| 183 | switch ( $segment ) { |
| 184 | |
| 185 | case '.': |
| 186 | break; |
| 187 | |
| 188 | case '..': |
| 189 | // @phan-suppress-next-line PhanTypeInvalidDimOffset False positive |
| 190 | if ( !$path_len || ( $path[$path_len - 1] === '..' ) ) { |
| 191 | $path[] = $segment; |
| 192 | $path_len++; |
| 193 | } else { |
| 194 | array_pop( $path ); |
| 195 | $path_len--; |
| 196 | } |
| 197 | break; |
| 198 | |
| 199 | default: |
| 200 | $path[] = $segment; |
| 201 | $path_len++; |
| 202 | break; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | return implode( '/', $path ); |
| 207 | } |
| 208 | |
| 209 | public function unshiftFrame( $frame ) { |
| 210 | array_unshift( $this->frames, $frame ); |
| 211 | } |
| 212 | |
| 213 | public function shiftFrame() { |
| 214 | return array_shift( $this->frames ); |
| 215 | } |
| 216 | |
| 217 | } |