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| 1 | <?php |
| 2 | /** |
| 3 | * @private |
| 4 | * @see less-3.13.1.js#Call.prototype |
| 5 | */ |
| 6 | class Less_Tree_Call extends Less_Tree { |
| 7 | public $name; |
| 8 | public $args; |
| 9 | public $calc; |
| 10 | public $index; |
| 11 | public $currentFileInfo; |
| 12 | |
| 13 | public function __construct( $name, $args, $index, $currentFileInfo = null ) { |
| 14 | $this->name = $name; |
| 15 | $this->args = $args; |
| 16 | $this->calc = $name === 'calc'; |
| 17 | $this->index = $index; |
| 18 | $this->currentFileInfo = $currentFileInfo; |
| 19 | } |
| 20 | |
| 21 | public function accept( $visitor ) { |
| 22 | $this->args = $visitor->visitArray( $this->args ); |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * @see less-2.5.3.js#functionCaller.prototype.call |
| 27 | */ |
| 28 | private function functionCaller( $function, array $arguments ) { |
| 29 | // This code is terrible and should be replaced as per this issue... |
| 30 | // https://github.com/less/less.js/issues/2477 |
| 31 | $filtered = []; |
| 32 | foreach ( $arguments as $argument ) { |
| 33 | if ( $argument instanceof Less_Tree_Comment ) { |
| 34 | continue; |
| 35 | } |
| 36 | $filtered[] = $argument; |
| 37 | } |
| 38 | foreach ( $filtered as $index => $argument ) { |
| 39 | if ( $argument instanceof Less_Tree_Expression ) { |
| 40 | $filtered[$index] = $argument->mapToFunctionCallArgument(); |
| 41 | } |
| 42 | } |
| 43 | return $function( ...$filtered ); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * @param Less_Environment $env |
| 48 | * @return void |
| 49 | */ |
| 50 | private function exitCalc( $env, $currentMathContext ) { |
| 51 | if ( $this->calc || $env->inCalc ) { |
| 52 | $env->exitCalc(); |
| 53 | } |
| 54 | $env->mathOn = $currentMathContext; |
| 55 | } |
| 56 | |
| 57 | // |
| 58 | // When evaluating a function call, |
| 59 | // we either find the function in Less_Functions, |
| 60 | // in which case we call it, passing the evaluated arguments, |
| 61 | // or we simply print it out as it literal CSS. |
| 62 | // |
| 63 | // The reason why we compile the arguments, is in the case one |
| 64 | // of them is a LESS variable that only PHP knows the value of, |
| 65 | // like: `saturate(@mycolor)`. |
| 66 | // The function should receive the value, not the variable. |
| 67 | // TODO less.js#3.13.1 provide better parity with upstream. |
| 68 | public function compile( $env ) { |
| 69 | /** |
| 70 | * Turn off math for calc(), and switch back on for evaluating nested functions |
| 71 | */ |
| 72 | $currentMathContext = $env->mathOn; |
| 73 | $env->mathOn = !$this->calc; |
| 74 | |
| 75 | if ( $this->calc || $env->inCalc ) { |
| 76 | $env->enterCalc(); |
| 77 | } |
| 78 | |
| 79 | $args = []; |
| 80 | foreach ( $this->args as $a ) { |
| 81 | $args[] = $a->compile( $env ); |
| 82 | } |
| 83 | |
| 84 | $env->mathOn = $currentMathContext; |
| 85 | |
| 86 | $nameLC = strtolower( $this->name ); |
| 87 | switch ( $nameLC ) { |
| 88 | case '%': |
| 89 | $nameLC = '_percent'; |
| 90 | break; |
| 91 | |
| 92 | case 'get-unit': |
| 93 | $nameLC = 'getunit'; |
| 94 | break; |
| 95 | |
| 96 | case 'data-uri': |
| 97 | $nameLC = 'datauri'; |
| 98 | break; |
| 99 | |
| 100 | case 'svg-gradient': |
| 101 | $nameLC = 'svggradient'; |
| 102 | break; |
| 103 | case 'image-size': |
| 104 | $nameLC = 'imagesize'; |
| 105 | break; |
| 106 | case 'image-width': |
| 107 | $nameLC = 'imagewidth'; |
| 108 | break; |
| 109 | case 'image-height': |
| 110 | $nameLC = 'imageheight'; |
| 111 | break; |
| 112 | } |
| 113 | |
| 114 | $result = null; |
| 115 | if ( $nameLC === 'default' ) { |
| 116 | $result = Less_Tree_DefaultFunc::compile(); |
| 117 | } else { |
| 118 | $func = null; |
| 119 | $functions = new Less_Functions( $env, $this->currentFileInfo ); |
| 120 | $funcBuiltin = [ $functions, $nameLC ]; |
| 121 | // Avoid method_exists() as that considers private utility functions too |
| 122 | if ( is_callable( $funcBuiltin ) ) { |
| 123 | $func = $funcBuiltin; |
| 124 | } elseif ( isset( $env->functions[$nameLC] ) && is_callable( $env->functions[$nameLC] ) ) { |
| 125 | $func = $env->functions[$nameLC]; |
| 126 | } |
| 127 | // If the function name isn't known to LESS, output it unchanged as CSS. |
| 128 | if ( $func ) { |
| 129 | try { |
| 130 | $result = $this->functionCaller( $func, $args ); |
| 131 | $this->exitCalc( $env, $currentMathContext ); |
| 132 | } catch ( Exception $e ) { |
| 133 | // Preserve original trace, especially from custom functions. |
| 134 | // https://github.com/wikimedia/less.php/issues/38 |
| 135 | throw new Less_Exception_Compiler( |
| 136 | 'error evaluating function `' . $this->name . '` ' . $e->getMessage() |
| 137 | . ' index: ' . $this->index, |
| 138 | $e |
| 139 | ); |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | if ( $result !== null ) { |
| 145 | return $result; |
| 146 | } |
| 147 | $this->exitCalc( $env, $currentMathContext ); |
| 148 | return new self( $this->name, $args, $this->index, $this->currentFileInfo ); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * @see Less_Tree::genCSS |
| 153 | */ |
| 154 | public function genCSS( $output ) { |
| 155 | $output->add( $this->name . '(', $this->currentFileInfo, $this->index ); |
| 156 | $args_len = count( $this->args ); |
| 157 | for ( $i = 0; $i < $args_len; $i++ ) { |
| 158 | $this->args[$i]->genCSS( $output ); |
| 159 | if ( $i + 1 < $args_len ) { |
| 160 | $output->add( ', ' ); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | $output->add( ')' ); |
| 165 | } |
| 166 | |
| 167 | } |