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| 1 | <?php |
| 2 | /** |
| 3 | * @private |
| 4 | */ |
| 5 | class Less_Tree_Variable extends Less_Tree { |
| 6 | |
| 7 | public $name; |
| 8 | public $index; |
| 9 | public $currentFileInfo; |
| 10 | public $evaluating = false; |
| 11 | |
| 12 | /** |
| 13 | * @param string $name |
| 14 | */ |
| 15 | public function __construct( $name, $index = null, $currentFileInfo = null ) { |
| 16 | $this->name = $name; |
| 17 | $this->index = $index; |
| 18 | $this->currentFileInfo = $currentFileInfo; |
| 19 | } |
| 20 | |
| 21 | /** |
| 22 | * @param Less_Environment $env |
| 23 | * @return Less_Tree|Less_Tree_Keyword|Less_Tree_Quoted |
| 24 | * @see less-3.13.1.js#Variable.prototype.eval |
| 25 | */ |
| 26 | public function compile( $env ) { |
| 27 | // Optimization: Less.js checks if string starts with @@, we only check if second char is @ |
| 28 | if ( $this->name[1] === '@' ) { |
| 29 | $v = new self( substr( $this->name, 1 ), $this->index + 1, $this->currentFileInfo ); |
| 30 | // While some Less_Tree nodes have no 'value', we know these can't occur after a |
| 31 | // variable assignment (would have been a ParseError). |
| 32 | $name = '@' . $v->compile( $env )->value; |
| 33 | } else { |
| 34 | $name = $this->name; |
| 35 | } |
| 36 | |
| 37 | if ( $this->evaluating ) { |
| 38 | throw new Less_Exception_Compiler( "Recursive variable definition for " . $name, null, $this->index, $this->currentFileInfo ); |
| 39 | } |
| 40 | |
| 41 | $this->evaluating = true; |
| 42 | $variable = null; |
| 43 | foreach ( $env->frames as $frame ) { |
| 44 | /** @var Less_Tree_Ruleset $frame */ |
| 45 | $v = $frame->variable( $name ); |
| 46 | if ( $v ) { |
| 47 | if ( isset( $v->important ) && $v->important ) { |
| 48 | $importantScopeLength = count( $env->importantScope ); |
| 49 | $env->importantScope[ $importantScopeLength - 1 ]['important'] = $v->important; |
| 50 | } |
| 51 | // If in calc, wrap vars in a function call to cascade evaluate args first |
| 52 | if ( $env->inCalc ) { |
| 53 | $call = new Less_Tree_Call( '_SELF', [ $v->value ], $this->index, $this->currentFileInfo ); |
| 54 | $variable = $call->compile( $env ); |
| 55 | break; |
| 56 | } else { |
| 57 | $variable = $v->value->compile( $env ); |
| 58 | break; |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | if ( $variable ) { |
| 63 | $this->evaluating = false; |
| 64 | return $variable; |
| 65 | } |
| 66 | |
| 67 | throw new Less_Exception_Compiler( "variable " . $name . " is undefined in file " . $this->currentFileInfo["filename"], null, $this->index, $this->currentFileInfo ); |
| 68 | } |
| 69 | |
| 70 | } |