Chris@0: <?php
Chris@0: 
Chris@0: namespace Zumba\Mink\Driver;
Chris@0: 
Chris@0: use Behat\Mink\Exception\DriverException;
Chris@0: 
Chris@0: /**
Chris@0:  * Class JavascriptTrait
Chris@0:  * @package Zumba\Mink\Driver
Chris@0:  */
Chris@0: trait JavascriptTrait {
Chris@0: 
Chris@0:   /**
Chris@0:    * Executes a script on the browser
Chris@0:    * @param string $script
Chris@0:    */
Chris@0:   public function executeScript($script) {
Chris@2:     $this->browser->execute($this->fixSelfExecutingFunction($script));
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Evaluates a script and returns the result
Chris@0:    * @param string $script
Chris@0:    * @return mixed
Chris@0:    */
Chris@0:   public function evaluateScript($script) {
Chris@2:       $script = preg_replace('/^return\s+/', '', $script);
Chris@2: 
Chris@2:       $script = $this->fixSelfExecutingFunction($script);
Chris@2: 
Chris@2:       return $this->browser->evaluate($script);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Waits some time or until JS condition turns true.
Chris@0:    *
Chris@0:    * @param integer $timeout timeout in milliseconds
Chris@0:    * @param string  $condition JS condition
Chris@0:    * @return boolean
Chris@0:    * @throws DriverException                  When the operation cannot be done
Chris@0:    */
Chris@0:   public function wait($timeout, $condition) {
Chris@0:     $start = microtime(true);
Chris@0:     $end = $start + $timeout / 1000.0;
Chris@0:     do {
Chris@0:       $result = $this->browser->evaluate($condition);
Chris@2:       if ($result) {
Chris@2:         // No need to wait any longer when the condition is met already.
Chris@2:         return TRUE;
Chris@2:       }
Chris@0:       usleep(100000);
Chris@0:     } while (microtime(true) < $end && !$result);
Chris@0: 
Chris@0:     return (bool)$result;
Chris@0:   }
Chris@0: 
Chris@2:     /**
Chris@2:      * Fixes self-executing functions to allow evaluating them.
Chris@2:      *
Chris@2:      * The self-executing function must be wrapped in braces to work.
Chris@2:      *
Chris@2:      * @param string $script
Chris@2:      *
Chris@2:      * @return string
Chris@2:      */
Chris@2:     private function fixSelfExecutingFunction($script)
Chris@2:     {
Chris@2:         if (preg_match('/^function[\s\(]/', $script)) {
Chris@2:             $script = preg_replace('/;$/', '', $script);
Chris@2:             $script = '(' . $script . ')';
Chris@2:         }
Chris@2: 
Chris@2:         return $script;
Chris@2:     }
Chris@0: }