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<?php |
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namespace PhpOffice\PhpSpreadsheet\Calculation\Token; |
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use PhpOffice\PhpSpreadsheet\Calculation\Calculation; |
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class Stack |
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{ |
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/** |
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* The parser stack for formulae. |
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* |
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* @var mixed[] |
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*/ |
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private $stack = []; |
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/** |
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* Count of entries in the parser stack. |
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* |
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* @var int |
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*/ |
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private $count = 0; |
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/** |
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* Return the number of entries on the stack. |
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* |
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* @return int |
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*/ |
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public function count() |
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{ |
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return $this->count; |
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} |
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/** |
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* Push a new entry onto the stack. |
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* |
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* @param mixed $type |
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* @param mixed $value |
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* @param mixed $reference |
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* @param null|string $storeKey will store the result under this alias |
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* @param null|string $onlyIf will only run computation if the matching |
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* store key is true |
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* @param null|string $onlyIfNot will only run computation if the matching |
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* store key is false |
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*/ |
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public function push( |
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$type, |
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$value, |
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$reference = null, |
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$storeKey = null, |
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$onlyIf = null, |
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$onlyIfNot = null |
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) { |
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$stackItem = $this->getStackItem($type, $value, $reference, $storeKey, $onlyIf, $onlyIfNot); |
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$this->stack[$this->count++] = $stackItem; |
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if ($type == 'Function') { |
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$localeFunction = Calculation::localeFunc($value); |
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if ($localeFunction != $value) { |
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$this->stack[($this->count - 1)]['localeValue'] = $localeFunction; |
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} |
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} |
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} |
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public function getStackItem( |
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$type, |
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$value, |
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$reference = null, |
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$storeKey = null, |
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$onlyIf = null, |
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$onlyIfNot = null |
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) { |
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$stackItem = [ |
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'type' => $type, |
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'value' => $value, |
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'reference' => $reference, |
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]; |
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if (isset($storeKey)) { |
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$stackItem['storeKey'] = $storeKey; |
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} |
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if (isset($onlyIf)) { |
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$stackItem['onlyIf'] = $onlyIf; |
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} |
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if (isset($onlyIfNot)) { |
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$stackItem['onlyIfNot'] = $onlyIfNot; |
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} |
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return $stackItem; |
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} |
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/** |
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* Pop the last entry from the stack. |
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* |
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* @return mixed |
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*/ |
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public function pop() |
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{ |
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if ($this->count > 0) { |
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return $this->stack[--$this->count]; |
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} |
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return null; |
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} |
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/** |
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* Return an entry from the stack without removing it. |
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* |
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* @param int $n number indicating how far back in the stack we want to look |
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* |
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* @return mixed |
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*/ |
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public function last($n = 1) |
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{ |
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if ($this->count - $n < 0) { |
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return null; |
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} |
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return $this->stack[$this->count - $n]; |
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} |
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/** |
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* Clear the stack. |
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*/ |
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public function clear() |
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{ |
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$this->stack = []; |
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$this->count = 0; |
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} |
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public function __toString() |
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{ |
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$str = 'Stack: '; |
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foreach ($this->stack as $index => $item) { |
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if ($index > $this->count - 1) { |
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break; |
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} |
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$value = $item['value'] ?? 'no value'; |
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while (is_array($value)) { |
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$value = array_pop($value); |
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} |
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$str .= $value . ' |> '; |
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} |
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return $str; |
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} |
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} |
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PHPOffice /
PhpSpreadsheet
