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113 lines
2.9 KiB
PHP
Executable File
113 lines
2.9 KiB
PHP
Executable File
<?php
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/** @file recursivetreeiterator.inc
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* @ingroup Examples
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* @brief class RecursiveTreeIterator
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* @author Marcus Boerger, Johannes Schlueter
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* @date 2005
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*
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* SPL - Standard PHP Library
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*/
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/** @ingroup Examples
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* @brief RecursiveIteratorIterator to generate ASCII graphic trees for the
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* entries in a RecursiveIterator
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* @author Marcus Boerger, Johannes Schlueter
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* @version 1.0
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*/
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class RecursiveTreeIterator extends RecursiveIteratorIterator
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{
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const BYPASS_CURRENT = 0x00000004;
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const BYPASS_KEY = 0x00000008;
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private $rit_flags;
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/**
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* @param it iterator to use as inner iterator
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* @param rit_flags flags passed to RecursiveIteratoIterator (parent)
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* @param cit_flags flags passed to RecursiveCachingIterator (for hasNext)
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* @param mode mode passed to RecursiveIteratoIterator (parent)
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*/
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function __construct(RecursiveIterator $it, $rit_flags = self::BYPASS_KEY, $cit_flags = CachingIterator::CATCH_GET_CHILD, $mode = self::SELF_FIRST)
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{
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parent::__construct(new RecursiveCachingIterator($it, $cit_flags), $mode, $rit_flags);
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$this->rit_flags = $rit_flags;
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}
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/** Prefix strings used in getPrefix()
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*
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* 0: prefix used to start elements
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* 1: prefix used if $level < depth and hasNext($level) == true
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* 2: prefix used if $level < depth and hasNext($level) == false
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* 3: prefix used if $level == depth and hasNext($level) == true
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* 4: prefix used if $level == depth and hasNext($level) == false
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* 5: prefix used right in front of the current element
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*/
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public $prefix = array(0=>'', 1=>'| ', 2=>' ', 3=>'|-', 4=>'\-', 5=>'');
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/** @return string to place in front of current element
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*/
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function getPrefix()
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{
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$tree = '';
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for ($level = 0; $level < $this->getDepth(); $level++)
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{
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$tree .= $this->getSubIterator($level)->hasNext() ? $this->prefix[1] : $this->prefix[2];
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}
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$tree .= $this->getSubIterator($level)->hasNext() ? $this->prefix[3] : $this->prefix[4];
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return $this->prefix[0] . $tree . $this->prefix[5];
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}
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/** @return string presentation build for current element
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*/
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function getEntry()
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{
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return @(string)parent::current();
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}
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/** @return string to place after the current element
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*/
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function getPostfix()
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{
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return '';
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}
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/** @return the current element prefixed and postfixed
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*/
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function current()
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{
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if ($this->rit_flags & self::BYPASS_CURRENT)
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{
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return parent::current();
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}
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else
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{
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return $this->getPrefix() . $this->getEntry() . $this->getPostfix();
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}
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}
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/** @return the current key prefixed and postfixed
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*/
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function key()
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{
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if ($this->rit_flags & self::BYPASS_KEY)
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{
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return parent::key();
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}
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else
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{
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return $this->getPrefix() . parent::key() . $this->getPostfix();
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}
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}
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/** Aggregates the inner iterator
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*/
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function __call($func, $params)
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{
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return call_user_func_array(array($this->getSubIterator(), $func), $params);
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}
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}
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?>
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