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Code Issues Releases Wiki Activity

Gusev's proposed patch

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Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
This commit is contained in:
Edward Z. Yang
2013-10-12 21:24:38 -07:00
parent 6e37ecd1c8
commit c768146e4d
6 changed files with 426 additions and 4 deletions
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184
library/HTMLPurifier/Array.php Normal file
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@ -0,0 +1,184 @@
<?php
class HTMLPurifier_Array implements ArrayAccess
{
/**
* @param HTMLPurifier_ArrayNode
*/
public $head = null;
/**
* @var int
*/
protected $count = 0;
/**
* @var int
*/
protected $offset = 0;
/**
* @var HTMLPurifier_ArrayNode
*/
protected $offsetItem = null;
public function __construct(array $array = array())
{
/**
* @var HTMLPurifier_ArrayNode $temp
*/
$temp = null;
$i = 0;
foreach ($array as &$v) {
$item = new HTMLPurifier_ArrayNode($v);
if ($this->head == null) {
$this->head = &$item;
}
if ($temp instanceof HTMLPurifier_ArrayNode) {
$item->prev = &$temp;
$temp->next = &$item;
}
unset($temp);
$temp = &$item;
$i ++;
unset($item, $v);
}
$this->count = $i;
$this->offset = 0;
$this->offsetItem = &$this->head;
}
protected function findIndex($offset)
{
if ($this->head == null) {
return array(
'correct' => false,
'value' => null
);
}
$current = &$this->head;
$index = 0;
if ($this->offset <= $offset && $this->offsetItem instanceof HTMLPurifier_ArrayNode) {
$current = &$this->offsetItem;
$index = $this->offset;
}
while ($current->next instanceof HTMLPurifier_ArrayNode && $index != $offset) {
$current = &$current->next;
$index ++;
}
if ($index == $offset) {
$this->offset = $offset;
$this->offsetItem = &$current;
return array(
'correct' => true,
'value' => &$current
);
}
return array(
'correct' => false,
'value' => &$current
);
}
public function insertBefore($offset, $value)
{
$result = $this->findIndex($offset);
$this->count ++;
$item = new HTMLPurifier_ArrayNode($value);
if ($result['correct'] == false) {
if ($result['value'] instanceof HTMLPurifier_ArrayNode) {
$result['value']->next = &$item;
$item->prev = &$result['value'];
}
} else {
if ($result['value'] instanceof HTMLPurifier_ArrayNode) {
$item->prev = &$result['value']->prev;
$item->next = &$result['value'];
}
if ($item->prev instanceof HTMLPurifier_ArrayNode) {
$item->prev->next = &$item;
}
if ($result['value'] instanceof HTMLPurifier_ArrayNode) {
$result['value']->prev = &$item;
}
}
if ($offset == 0) {
$this->head = &$item;
}
if ($offset <= $this->offset && $this->offsetItem instanceof HTMLPurifier_ArrayNode) {
$this->offsetItem = &$this->offsetItem->prev;
}
}
public function remove($offset)
{
$result = $this->findIndex($offset);
if ($result['correct']) {
$this->count --;
$item = $result['value'];
$item->prev->next = &$result['value']->next;
$item->next->prev = &$result['value']->prev;
if ($offset == 0) {
$this->head = &$item->next;
}
if ($offset < $this->offset) {
$this->offset --;
} elseif ($offset == $this->offset) {
$this->offsetItem = &$item->next;
}
}
}
public function getArray()
{
$return = array();
$head = $this->head;
while ($head instanceof HTMLPurifier_ArrayNode) {
$return[] = $head->value;
$head = &$head->next;
}
return $return;
}
public function offsetExists($offset)
{
return $offset >= 0 && $offset < $this->count;
}
public function offsetGet($offset)
{
$result = $this->findIndex($offset);
if ($result['correct']) {
return $result['value']->value;
}
return null;
}
public function offsetSet($offset, $value)
{
$result = $this->findIndex($offset);
if ($result['correct']) {
$result['value']->value = &$value;
}
}
public function offsetUnset($offset)
{
$this->remove($offset);
}
}