Файл: vendor/nette/utils/src/Iterators/CachingIterator.php
Строк: 125
<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace NetteIterators;
use Nette;
/**
* Smarter caching iterator.
*
* @property-read bool $first
* @property-read bool $last
* @property-read bool $empty
* @property-read bool $odd
* @property-read bool $even
* @property-read int $counter
* @property-read mixed $nextKey
* @property-read mixed $nextValue
*/
class CachingIterator extends CachingIterator implements Countable
{
use NetteSmartObject;
private int $counter = 0;
public function __construct(iterable|stdClass $iterable)
{
$iterable = $iterable instanceof stdClass
? new ArrayIterator($iterable)
: NetteUtilsIterables::toIterator($iterable);
parent::__construct($iterable, 0);
}
/**
* Is the current element the first one?
*/
public function isFirst(?int $gridWidth = null): bool
{
return $this->counter === 1 || ($gridWidth && $this->counter !== 0 && (($this->counter - 1) % $gridWidth) === 0);
}
/**
* Is the current element the last one?
*/
public function isLast(?int $gridWidth = null): bool
{
return !$this->hasNext() || ($gridWidth && ($this->counter % $gridWidth) === 0);
}
/**
* Is the iterator empty?
*/
public function isEmpty(): bool
{
return $this->counter === 0;
}
/**
* Is the counter odd?
*/
public function isOdd(): bool
{
return $this->counter % 2 === 1;
}
/**
* Is the counter even?
*/
public function isEven(): bool
{
return $this->counter % 2 === 0;
}
/**
* Returns the counter.
*/
public function getCounter(): int
{
return $this->counter;
}
/**
* Returns the count of elements.
*/
public function count(): int
{
$inner = $this->getInnerIterator();
if ($inner instanceof Countable) {
return $inner->count();
} else {
throw new NetteNotSupportedException('Iterator is not countable.');
}
}
/**
* Forwards to the next element.
*/
public function next(): void
{
parent::next();
if (parent::valid()) {
$this->counter++;
}
}
/**
* Rewinds the Iterator.
*/
public function rewind(): void
{
parent::rewind();
$this->counter = parent::valid() ? 1 : 0;
}
/**
* Returns the next key.
*/
public function getNextKey(): mixed
{
return $this->getInnerIterator()->key();
}
/**
* Returns the next element.
*/
public function getNextValue(): mixed
{
return $this->getInnerIterator()->current();
}
}