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<?php |
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/** |
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* A zipper is a purely-functional data structure which contains |
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* a focus that can be efficiently manipulated. It is known as |
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* a "one-hole context". This mutable variant implements a zipper |
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* for a list as a pair of two arrays, laid out as follows: |
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* |
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* Base list: 1 2 3 4 [ ] 6 7 8 9 |
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* Front list: 1 2 3 4 |
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* Back list: 9 8 7 6 |
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* |
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* User is expected to keep track of the "current element" and properly |
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* fill it back in as necessary. (ToDo: Maybe it's more user friendly |
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* to implicitly track the current element?) |
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* |
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* Nota bene: the current class gets confused if you try to store NULLs |
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* in the list. |
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*/ |
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class HTMLPurifier_Zipper |
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{ |
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public $front, $back; |
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public function __construct($front, $back) { |
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$this->front = $front; |
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$this->back = $back; |
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} |
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/** |
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* Creates a zipper from an array, with a hole in the |
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* 0-index position. |
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* @param Array to zipper-ify. |
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* @return Tuple of zipper and element of first position. |
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*/ |
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static public function fromArray($array) { |
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$z = new self(array(), array_reverse($array)); |
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$t = $z->delete(); // delete the "dummy hole" |
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return array($z, $t); |
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} |
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/** |
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* Convert zipper back into a normal array, optionally filling in |
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* the hole with a value. (Usually you should supply a $t, unless you |
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* are at the end of the array.) |
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*/ |
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public function toArray($t = NULL) { |
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$a = $this->front; |
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if ($t !== NULL) $a[] = $t; |
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for ($i = count($this->back)-1; $i >= 0; $i--) { |
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$a[] = $this->back[$i]; |
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} |
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return $a; |
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} |
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/** |
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* Move hole to the next element. |
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* @param $t Element to fill hole with |
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* @return Original contents of new hole. |
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*/ |
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public function next($t) { |
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if ($t !== NULL) array_push($this->front, $t); |
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return empty($this->back) ? NULL : array_pop($this->back); |
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} |
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/** |
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* Iterated hole advancement. |
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* @param $t Element to fill hole with |
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* @param $i How many forward to advance hole |
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* @return Original contents of new hole, i away |
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*/ |
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public function advance($t, $n) { |
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for ($i = 0; $i < $n; $i++) { |
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$t = $this->next($t); |
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} |
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return $t; |
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} |
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/** |
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* Move hole to the previous element |
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* @param $t Element to fill hole with |
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* @return Original contents of new hole. |
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*/ |
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public function prev($t) { |
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if ($t !== NULL) array_push($this->back, $t); |
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return empty($this->front) ? NULL : array_pop($this->front); |
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} |
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/** |
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* Delete contents of current hole, shifting hole to |
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* next element. |
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* @return Original contents of new hole. |
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*/ |
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public function delete() { |
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return empty($this->back) ? NULL : array_pop($this->back); |
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} |
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/** |
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* Returns true if we are at the end of the list. |
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* @return bool |
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*/ |
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public function done() { |
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return empty($this->back); |
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} |
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/** |
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* Insert element before hole. |
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* @param Element to insert |
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*/ |
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public function insertBefore($t) { |
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if ($t !== NULL) array_push($this->front, $t); |
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} |
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/** |
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* Insert element after hole. |
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* @param Element to insert |
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*/ |
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public function insertAfter($t) { |
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if ($t !== NULL) array_push($this->back, $t); |
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} |
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/** |
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* Splice in multiple elements at hole. Functional specification |
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* in terms of array_splice: |
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* |
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* $arr1 = $arr; |
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* $old1 = array_splice($arr1, $i, $delete, $replacement); |
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* |
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* list($z, $t) = HTMLPurifier_Zipper::fromArray($arr); |
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* $t = $z->advance($t, $i); |
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* list($old2, $t) = $z->splice($t, $delete, $replacement); |
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* $arr2 = $z->toArray($t); |
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* |
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* assert($old1 === $old2); |
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* assert($arr1 === $arr2); |
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* |
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* NB: the absolute index location after this operation is |
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* *unchanged!* |
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* |
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* @param Current contents of hole. |
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*/ |
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public function splice($t, $delete, $replacement) { |
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// delete |
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$old = array(); |
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$r = $t; |
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for ($i = $delete; $i > 0; $i--) { |
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$old[] = $r; |
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$r = $this->delete(); |
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} |
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// insert |
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for ($i = count($replacement)-1; $i >= 0; $i--) { |
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$this->insertAfter($r); |
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$r = $replacement[$i]; |
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} |
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return array($old, $r); |
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} |
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} |
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The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g.
excluded_paths: ["lib/*"]
, you can move it to the dependency path list as follows:For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths