469 lines
14 KiB
PHP
469 lines
14 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\VarDumper\Cloner;
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use Symfony\Component\VarDumper\Caster\Caster;
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use Symfony\Component\VarDumper\Dumper\ContextProvider\SourceContextProvider;
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/**
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class Data implements \ArrayAccess, \Countable, \IteratorAggregate
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{
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private $data;
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private $position = 0;
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private $key = 0;
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private $maxDepth = 20;
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private $maxItemsPerDepth = -1;
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private $useRefHandles = -1;
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private $context = [];
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/**
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* @param array $data An array as returned by ClonerInterface::cloneVar()
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*/
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public function __construct(array $data)
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{
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$this->data = $data;
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}
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/**
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* @return string|null
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*/
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public function getType()
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{
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$item = $this->data[$this->position][$this->key];
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if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
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$item = $item->value;
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}
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if (!$item instanceof Stub) {
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return \gettype($item);
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}
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if (Stub::TYPE_STRING === $item->type) {
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return 'string';
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}
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if (Stub::TYPE_ARRAY === $item->type) {
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return 'array';
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}
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if (Stub::TYPE_OBJECT === $item->type) {
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return $item->class;
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}
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if (Stub::TYPE_RESOURCE === $item->type) {
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return $item->class.' resource';
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}
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return null;
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}
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/**
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* Returns a native representation of the original value.
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*
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* @param array|bool $recursive Whether values should be resolved recursively or not
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*
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* @return string|int|float|bool|array|Data[]|null
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*/
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public function getValue($recursive = false)
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{
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$item = $this->data[$this->position][$this->key];
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if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
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$item = $item->value;
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}
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if (!($item = $this->getStub($item)) instanceof Stub) {
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return $item;
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}
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if (Stub::TYPE_STRING === $item->type) {
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return $item->value;
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}
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$children = $item->position ? $this->data[$item->position] : [];
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foreach ($children as $k => $v) {
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if ($recursive && !($v = $this->getStub($v)) instanceof Stub) {
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continue;
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}
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$children[$k] = clone $this;
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$children[$k]->key = $k;
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$children[$k]->position = $item->position;
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if ($recursive) {
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if (Stub::TYPE_REF === $v->type && ($v = $this->getStub($v->value)) instanceof Stub) {
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$recursive = (array) $recursive;
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if (isset($recursive[$v->position])) {
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continue;
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}
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$recursive[$v->position] = true;
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}
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$children[$k] = $children[$k]->getValue($recursive);
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}
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}
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return $children;
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}
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/**
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* @return int
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*/
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#[\ReturnTypeWillChange]
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public function count()
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{
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return \count($this->getValue());
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}
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/**
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* @return \Traversable
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*/
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#[\ReturnTypeWillChange]
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public function getIterator()
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{
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if (!\is_array($value = $this->getValue())) {
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throw new \LogicException(sprintf('"%s" object holds non-iterable type "%s".', self::class, get_debug_type($value)));
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}
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yield from $value;
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}
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public function __get(string $key)
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{
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if (null !== $data = $this->seek($key)) {
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$item = $this->getStub($data->data[$data->position][$data->key]);
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return $item instanceof Stub || [] === $item ? $data : $item;
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}
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return null;
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}
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/**
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* @return bool
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*/
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public function __isset(string $key)
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{
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return null !== $this->seek($key);
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}
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/**
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* @return bool
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*/
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#[\ReturnTypeWillChange]
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public function offsetExists($key)
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{
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return $this->__isset($key);
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}
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/**
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* @return mixed
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*/
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#[\ReturnTypeWillChange]
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public function offsetGet($key)
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{
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return $this->__get($key);
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}
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/**
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* @return void
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*/
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#[\ReturnTypeWillChange]
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public function offsetSet($key, $value)
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{
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throw new \BadMethodCallException(self::class.' objects are immutable.');
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}
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/**
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* @return void
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*/
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#[\ReturnTypeWillChange]
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public function offsetUnset($key)
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{
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throw new \BadMethodCallException(self::class.' objects are immutable.');
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}
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/**
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* @return string
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*/
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public function __toString()
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{
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$value = $this->getValue();
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if (!\is_array($value)) {
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return (string) $value;
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}
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return sprintf('%s (count=%d)', $this->getType(), \count($value));
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}
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/**
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* Returns a depth limited clone of $this.
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*
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* @return static
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*/
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public function withMaxDepth(int $maxDepth)
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{
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$data = clone $this;
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$data->maxDepth = $maxDepth;
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return $data;
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}
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/**
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* Limits the number of elements per depth level.
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*
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* @return static
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*/
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public function withMaxItemsPerDepth(int $maxItemsPerDepth)
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{
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$data = clone $this;
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$data->maxItemsPerDepth = $maxItemsPerDepth;
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return $data;
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}
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/**
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* Enables/disables objects' identifiers tracking.
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*
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* @param bool $useRefHandles False to hide global ref. handles
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*
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* @return static
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*/
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public function withRefHandles(bool $useRefHandles)
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{
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$data = clone $this;
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$data->useRefHandles = $useRefHandles ? -1 : 0;
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return $data;
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}
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/**
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* @return static
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*/
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public function withContext(array $context)
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{
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$data = clone $this;
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$data->context = $context;
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return $data;
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}
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/**
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* Seeks to a specific key in nested data structures.
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*
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* @param string|int $key The key to seek to
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*
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* @return static|null
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*/
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public function seek($key)
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{
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$item = $this->data[$this->position][$this->key];
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if ($item instanceof Stub && Stub::TYPE_REF === $item->type && !$item->position) {
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$item = $item->value;
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}
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if (!($item = $this->getStub($item)) instanceof Stub || !$item->position) {
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return null;
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}
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$keys = [$key];
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switch ($item->type) {
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case Stub::TYPE_OBJECT:
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$keys[] = Caster::PREFIX_DYNAMIC.$key;
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$keys[] = Caster::PREFIX_PROTECTED.$key;
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$keys[] = Caster::PREFIX_VIRTUAL.$key;
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$keys[] = "\0$item->class\0$key";
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// no break
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case Stub::TYPE_ARRAY:
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case Stub::TYPE_RESOURCE:
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break;
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default:
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return null;
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}
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$data = null;
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$children = $this->data[$item->position];
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foreach ($keys as $key) {
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if (isset($children[$key]) || \array_key_exists($key, $children)) {
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$data = clone $this;
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$data->key = $key;
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$data->position = $item->position;
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break;
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}
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}
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return $data;
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}
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/**
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* Dumps data with a DumperInterface dumper.
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*/
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public function dump(DumperInterface $dumper)
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{
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$refs = [0];
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$cursor = new Cursor();
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if ($cursor->attr = $this->context[SourceContextProvider::class] ?? []) {
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$cursor->attr['if_links'] = true;
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$cursor->hashType = -1;
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$dumper->dumpScalar($cursor, 'default', '^');
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$cursor->attr = ['if_links' => true];
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$dumper->dumpScalar($cursor, 'default', ' ');
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$cursor->hashType = 0;
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}
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$this->dumpItem($dumper, $cursor, $refs, $this->data[$this->position][$this->key]);
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}
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/**
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* Depth-first dumping of items.
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*
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* @param mixed $item A Stub object or the original value being dumped
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*/
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private function dumpItem(DumperInterface $dumper, Cursor $cursor, array &$refs, $item)
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{
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$cursor->refIndex = 0;
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$cursor->softRefTo = $cursor->softRefHandle = $cursor->softRefCount = 0;
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$cursor->hardRefTo = $cursor->hardRefHandle = $cursor->hardRefCount = 0;
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$firstSeen = true;
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if (!$item instanceof Stub) {
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$cursor->attr = [];
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$type = \gettype($item);
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if ($item && 'array' === $type) {
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$item = $this->getStub($item);
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}
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} elseif (Stub::TYPE_REF === $item->type) {
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if ($item->handle) {
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if (!isset($refs[$r = $item->handle - (\PHP_INT_MAX >> 1)])) {
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$cursor->refIndex = $refs[$r] = $cursor->refIndex ?: ++$refs[0];
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} else {
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$firstSeen = false;
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}
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$cursor->hardRefTo = $refs[$r];
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$cursor->hardRefHandle = $this->useRefHandles & $item->handle;
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$cursor->hardRefCount = 0 < $item->handle ? $item->refCount : 0;
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}
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$cursor->attr = $item->attr;
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$type = $item->class ?: \gettype($item->value);
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$item = $this->getStub($item->value);
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}
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if ($item instanceof Stub) {
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if ($item->refCount) {
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if (!isset($refs[$r = $item->handle])) {
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$cursor->refIndex = $refs[$r] = $cursor->refIndex ?: ++$refs[0];
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} else {
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$firstSeen = false;
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}
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$cursor->softRefTo = $refs[$r];
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}
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$cursor->softRefHandle = $this->useRefHandles & $item->handle;
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$cursor->softRefCount = $item->refCount;
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$cursor->attr = $item->attr;
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$cut = $item->cut;
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if ($item->position && $firstSeen) {
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$children = $this->data[$item->position];
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if ($cursor->stop) {
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if ($cut >= 0) {
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$cut += \count($children);
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}
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$children = [];
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}
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} else {
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$children = [];
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}
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switch ($item->type) {
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case Stub::TYPE_STRING:
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$dumper->dumpString($cursor, $item->value, Stub::STRING_BINARY === $item->class, $cut);
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break;
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case Stub::TYPE_ARRAY:
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$item = clone $item;
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$item->type = $item->class;
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$item->class = $item->value;
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// no break
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case Stub::TYPE_OBJECT:
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case Stub::TYPE_RESOURCE:
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$withChildren = $children && $cursor->depth !== $this->maxDepth && $this->maxItemsPerDepth;
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$dumper->enterHash($cursor, $item->type, $item->class, $withChildren);
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if ($withChildren) {
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if ($cursor->skipChildren) {
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$withChildren = false;
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$cut = -1;
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} else {
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$cut = $this->dumpChildren($dumper, $cursor, $refs, $children, $cut, $item->type, null !== $item->class);
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}
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} elseif ($children && 0 <= $cut) {
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$cut += \count($children);
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}
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$cursor->skipChildren = false;
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$dumper->leaveHash($cursor, $item->type, $item->class, $withChildren, $cut);
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break;
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default:
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throw new \RuntimeException(sprintf('Unexpected Stub type: "%s".', $item->type));
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}
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} elseif ('array' === $type) {
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$dumper->enterHash($cursor, Cursor::HASH_INDEXED, 0, false);
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$dumper->leaveHash($cursor, Cursor::HASH_INDEXED, 0, false, 0);
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} elseif ('string' === $type) {
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$dumper->dumpString($cursor, $item, false, 0);
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} else {
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$dumper->dumpScalar($cursor, $type, $item);
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}
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}
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/**
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* Dumps children of hash structures.
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*
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* @return int The final number of removed items
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*/
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private function dumpChildren(DumperInterface $dumper, Cursor $parentCursor, array &$refs, array $children, int $hashCut, int $hashType, bool $dumpKeys): int
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{
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$cursor = clone $parentCursor;
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++$cursor->depth;
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$cursor->hashType = $hashType;
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$cursor->hashIndex = 0;
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$cursor->hashLength = \count($children);
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$cursor->hashCut = $hashCut;
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foreach ($children as $key => $child) {
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$cursor->hashKeyIsBinary = isset($key[0]) && !preg_match('//u', $key);
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$cursor->hashKey = $dumpKeys ? $key : null;
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$this->dumpItem($dumper, $cursor, $refs, $child);
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if (++$cursor->hashIndex === $this->maxItemsPerDepth || $cursor->stop) {
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$parentCursor->stop = true;
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return $hashCut >= 0 ? $hashCut + $cursor->hashLength - $cursor->hashIndex : $hashCut;
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}
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}
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return $hashCut;
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}
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private function getStub($item)
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{
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if (!$item || !\is_array($item)) {
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return $item;
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}
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$stub = new Stub();
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$stub->type = Stub::TYPE_ARRAY;
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foreach ($item as $stub->class => $stub->position) {
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}
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if (isset($item[0])) {
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$stub->cut = $item[0];
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}
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$stub->value = $stub->cut + ($stub->position ? \count($this->data[$stub->position]) : 0);
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return $stub;
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}
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}
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