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| 1 | <?php |
| 2 | /** |
| 3 | * @private |
| 4 | */ |
| 5 | class Less_Visitor { |
| 6 | |
| 7 | protected $methods = []; |
| 8 | protected $_visitFnCache = []; |
| 9 | |
| 10 | public function __construct() { |
| 11 | $this->_visitFnCache = get_class_methods( get_class( $this ) ); |
| 12 | $this->_visitFnCache = array_flip( $this->_visitFnCache ); |
| 13 | } |
| 14 | |
| 15 | public function visitObj( $node ) { |
| 16 | static $funcNames = []; |
| 17 | |
| 18 | if ( !$node || !is_object( $node ) ) { |
| 19 | return $node; |
| 20 | } |
| 21 | |
| 22 | // Map a class name like "Less_Tree_Foo_Bar" to method like "visitFooBar". |
| 23 | // |
| 24 | // We do this by taking the last part of the class name (instead of doing |
| 25 | // a find-replace from "Less_Tree" to "visit"), so that we support codemod |
| 26 | // tools (such as Strauss and Mozart), which may modify our code in-place |
| 27 | // to add a namespace or class prefix. |
| 28 | // "MyVendor\Something_Less_Tree_Foo_Bar" should also map to "FooBar". |
| 29 | // |
| 30 | // https://packagist.org/packages/brianhenryie/strauss |
| 31 | // https://packagist.org/packages/coenjacobs/mozart |
| 32 | $class = get_class( $node ); |
| 33 | $funcName = $funcNames[$class] ??= 'visit' . str_replace( [ '_', '\\' ], '', |
| 34 | substr( $class, strpos( $class, 'Less_Tree_' ) + 10 ) |
| 35 | ); |
| 36 | |
| 37 | if ( isset( $this->_visitFnCache[$funcName] ) ) { |
| 38 | $visitDeeper = true; |
| 39 | $newNode = $this->$funcName( $node, $visitDeeper ); |
| 40 | if ( $this instanceof Less_VisitorReplacing ) { |
| 41 | $node = $newNode; |
| 42 | } |
| 43 | |
| 44 | if ( $visitDeeper && is_object( $node ) ) { |
| 45 | $node->accept( $this ); |
| 46 | } |
| 47 | |
| 48 | $funcName .= 'Out'; |
| 49 | if ( isset( $this->_visitFnCache[$funcName] ) ) { |
| 50 | $this->$funcName( $node ); |
| 51 | } |
| 52 | |
| 53 | } else { |
| 54 | $node->accept( $this ); |
| 55 | } |
| 56 | |
| 57 | return $node; |
| 58 | } |
| 59 | |
| 60 | public function visitArray( &$nodes ) { |
| 61 | // NOTE: The use of by-ref in a normal (non-replacing) Visitor may be surprising, |
| 62 | // but upstream relies on this for Less_ImportVisitor, which modifies values of |
| 63 | // `$importParent->rules` yet is not a replacing visitor. |
| 64 | foreach ( $nodes as &$node ) { |
| 65 | $this->visitObj( $node ); |
| 66 | } |
| 67 | return $nodes; |
| 68 | } |
| 69 | } |