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   1  <?php
   2  // $Id: image_plugin_argument_validate_image_size.inc,v 1.2 2009/08/26 18:41:44 joachim Exp $
   3  
   4  /**
   5   * @file
   6   * Views validation plugin for image size argument.
   7   */
   8  
   9  /**
  10   * Validation handler for image size.
  11   *
  12   * Validates an image size argument and allows to restrict which image sizes
  13   * are valid.
  14   */
  15  class image_plugin_argument_validate_image_size extends views_plugin_argument_validate {
  16    var $image_sizes = array();
  17  
  18    function init(&$view, &$argument, $id = NULL) {
  19      parent::init($view, $argument, $id);
  20      $this->image_sizes = image_get_sizes();
  21    }
  22  
  23    function validate_form(&$form, &$form_state) {
  24      $image_size_options = array();
  25      foreach ($this->image_sizes as $key => $size) {
  26        $image_size_options[$key] = $size['label'];
  27      }
  28  
  29      $form['image_size'] = array(
  30        '#type' => 'select',
  31        '#title' => t('Image sizes'),
  32        '#options' => $image_size_options,
  33        '#default_value' => $this->get_argument(),
  34        '#multiple' => TRUE,
  35        '#required' => TRUE,
  36        '#process' => array('views_process_dependency'),
  37        '#dependency' => array('edit-options-validate-type' => array($this->id)),
  38        '#description' => t("Which image sizes are allowed to be passed through this argument. Both 'original' and '_original' are valid."),
  39      );
  40    }
  41  
  42    function get_argument() {
  43      return isset($this->argument->options['image_size']) ? $this->argument->options['image_size'] : array_keys($this->image_sizes);
  44    }
  45  
  46    function validate_argument($argument) {
  47      // Allow 'original' as well as '_original'. It's really up to the handler to
  48      // deal with this and change it before it gets here, but seeing as we
  49      // promise to do this in the UI we should back it up here.
  50      if ($argument == 'original') {
  51        $argument = '_original';
  52      }
  53  
  54      return $this->argument->options['image_size'][$argument];
  55    }
  56  }
  57