Move into nested docroot
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web/vendor/symfony/browser-kit
102
web/vendor/symfony/browser-kit/History.php
vendored
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102
web/vendor/symfony/browser-kit/History.php
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<?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\BrowserKit;
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/**
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* History.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class History
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{
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protected $stack = array();
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protected $position = -1;
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/**
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* Clears the history.
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*/
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public function clear()
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{
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$this->stack = array();
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$this->position = -1;
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}
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/**
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* Adds a Request to the history.
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*
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* @param Request $request A Request instance
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*/
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public function add(Request $request)
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{
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$this->stack = array_slice($this->stack, 0, $this->position + 1);
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$this->stack[] = clone $request;
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$this->position = count($this->stack) - 1;
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}
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/**
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* Returns true if the history is empty.
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*
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* @return bool true if the history is empty, false otherwise
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*/
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public function isEmpty()
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{
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return count($this->stack) == 0;
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}
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/**
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* Goes back in the history.
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*
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* @return Request A Request instance
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*
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* @throws \LogicException if the stack is already on the first page
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*/
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public function back()
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{
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if ($this->position < 1) {
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throw new \LogicException('You are already on the first page.');
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}
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return clone $this->stack[--$this->position];
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}
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/**
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* Goes forward in the history.
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*
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* @return Request A Request instance
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*
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* @throws \LogicException if the stack is already on the last page
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*/
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public function forward()
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{
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if ($this->position > count($this->stack) - 2) {
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throw new \LogicException('You are already on the last page.');
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}
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return clone $this->stack[++$this->position];
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}
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/**
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* Returns the current element in the history.
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*
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* @return Request A Request instance
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*
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* @throws \LogicException if the stack is empty
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*/
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public function current()
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{
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if (-1 == $this->position) {
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throw new \LogicException('The page history is empty.');
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}
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return clone $this->stack[$this->position];
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}
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}
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