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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Parse and compile Less files into CSS |
| 5 | */ |
| 6 | class Less_Parser { |
| 7 | |
| 8 | /** |
| 9 | * Default parser options |
| 10 | * @var array<string,mixed> |
| 11 | */ |
| 12 | public static $default_options = [ |
| 13 | 'compress' => false, // option - whether to compress |
| 14 | 'strictUnits' => false, // whether units need to evaluate correctly |
| 15 | /* How to process math |
| 16 | * always - eagerly try to solve all operations |
| 17 | * parens-division - require parens for division "/" |
| 18 | * parens | strict - require parens for all operations |
| 19 | */ |
| 20 | // NOTE: We use the default of Less.js 4.0 (parens-division) |
| 21 | // instead of Less.js 3.13 (always). |
| 22 | 'math' => 'parens-division', |
| 23 | 'relativeUrls' => true, // option - whether to adjust URL's to be relative |
| 24 | 'urlArgs' => '', // whether to add args into url tokens |
| 25 | 'numPrecision' => 8, |
| 26 | |
| 27 | 'import_dirs' => [], |
| 28 | |
| 29 | 'cache_dir' => null, |
| 30 | 'cache_method' => 'serialize', // false, 'serialize', 'callback'; |
| 31 | 'cache_callback_get' => null, |
| 32 | 'cache_callback_set' => null, |
| 33 | |
| 34 | 'sourceMap' => false, // whether to output a source map |
| 35 | 'sourceMapBasepath' => null, |
| 36 | 'sourceMapWriteTo' => null, |
| 37 | 'sourceMapURL' => null, |
| 38 | |
| 39 | 'indentation' => ' ', |
| 40 | |
| 41 | 'plugins' => [], |
| 42 | 'functions' => [], |
| 43 | |
| 44 | ]; |
| 45 | |
| 46 | /** @var array{compress:bool,strictUnits:bool,relativeUrls:bool,urlArgs:string,numPrecision:int,import_dirs:array,indentation:string} */ |
| 47 | public static $options = []; |
| 48 | |
| 49 | private $input; // Less input string |
| 50 | private $input_len; // input string length |
| 51 | private $pos; // current index in `input` |
| 52 | private $saveStack = []; // holds state for backtracking |
| 53 | private $furthest; |
| 54 | private $mb_internal_encoding = ''; // for remember exists value of mbstring.internal_encoding |
| 55 | |
| 56 | private $autoCommentAbsorb = true; |
| 57 | /** |
| 58 | * @var array<array{index:int,text:string,isLineComment:bool}> |
| 59 | */ |
| 60 | private $commentStore = []; |
| 61 | |
| 62 | /** |
| 63 | * @var Less_Environment |
| 64 | */ |
| 65 | private $env; |
| 66 | |
| 67 | protected $rules = []; |
| 68 | |
| 69 | /** |
| 70 | * Evaluated ruleset created by `getCss()`. Stored for potential use in `getVariables()` |
| 71 | * @var Less_Tree[]|null |
| 72 | */ |
| 73 | private $cachedEvaldRules; |
| 74 | |
| 75 | public static $has_extends = false; |
| 76 | |
| 77 | public static $next_id = 0; |
| 78 | |
| 79 | /** |
| 80 | * Filename to contents of all parsed the files |
| 81 | * |
| 82 | * @var array |
| 83 | */ |
| 84 | public static $contentsMap = []; |
| 85 | |
| 86 | /** |
| 87 | * @param Less_Environment|array|null $env |
| 88 | */ |
| 89 | public function __construct( $env = null ) { |
| 90 | // Top parser on an import tree must be sure there is one "env" |
| 91 | // which will then be passed around by reference. |
| 92 | if ( $env instanceof Less_Environment ) { |
| 93 | $this->env = $env; |
| 94 | } else { |
| 95 | $this->Reset( $env ); |
| 96 | } |
| 97 | |
| 98 | // mbstring.func_overload > 1 bugfix |
| 99 | // The encoding value must be set for each source file, |
| 100 | // therefore, to conserve resources and improve the speed of this design is taken here |
| 101 | if ( ini_get( 'mbstring.func_overload' ) ) { |
| 102 | $this->mb_internal_encoding = ini_get( 'mbstring.internal_encoding' ); |
| 103 | @ini_set( 'mbstring.internal_encoding', 'ascii' ); |
| 104 | } |
| 105 | Less_Tree::$parse = $this; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Reset the parser state completely |
| 110 | */ |
| 111 | public function Reset( $options = null ) { |
| 112 | $this->rules = []; |
| 113 | $this->cachedEvaldRules = null; |
| 114 | self::$has_extends = false; |
| 115 | self::$contentsMap = []; |
| 116 | |
| 117 | $this->env = new Less_Environment(); |
| 118 | |
| 119 | // set new options |
| 120 | $this->SetOptions( self::$default_options ); |
| 121 | if ( is_array( $options ) ) { |
| 122 | $this->SetOptions( $options ); |
| 123 | } |
| 124 | |
| 125 | $this->env->Init(); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Set one or more compiler options |
| 130 | * options: import_dirs, cache_dir, cache_method |
| 131 | */ |
| 132 | public function SetOptions( $options ) { |
| 133 | foreach ( $options as $option => $value ) { |
| 134 | $this->SetOption( $option, $value ); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Set one compiler option |
| 140 | */ |
| 141 | public function SetOption( $option, $value ) { |
| 142 | switch ( $option ) { |
| 143 | case 'strictMath': |
| 144 | if ( $value ) { |
| 145 | $this->env->math = Less_Environment::MATH_PARENS; |
| 146 | } else { |
| 147 | $this->env->math = Less_Environment::MATH_ALWAYS; |
| 148 | } |
| 149 | break; |
| 150 | |
| 151 | case 'math': |
| 152 | $value = strtolower( $value ); |
| 153 | if ( $value === 'always' ) { |
| 154 | $this->env->math = Less_Environment::MATH_ALWAYS; |
| 155 | } elseif ( $value === 'parens-division' ) { |
| 156 | $this->env->math = Less_Environment::MATH_PARENS_DIVISION; |
| 157 | } elseif ( $value === 'parens' || $value === 'strict' ) { |
| 158 | $this->env->math = Less_Environment::MATH_PARENS; |
| 159 | } |
| 160 | return; |
| 161 | |
| 162 | case 'import_dirs': |
| 163 | $this->SetImportDirs( $value ); |
| 164 | return; |
| 165 | |
| 166 | case 'cache_dir': |
| 167 | if ( is_string( $value ) ) { |
| 168 | Less_Cache::SetCacheDir( $value ); |
| 169 | Less_Cache::CheckCacheDir(); |
| 170 | } |
| 171 | return; |