<?php
// $Id$
/**
 * @file
 * Provides a Views style plugin for jQuery jcarousel.
 */

/**
 * Implementation of hook_views_api().
 */
function viewscarousel_views_api() {
  return array('api' => 2);
}

function template_preprocess_viewscarousel_view(&$vars) {
  
  drupal_add_css(drupal_get_path('module', 'viewscarousel') .'/jquery.jcarousel.css');
  drupal_add_css(drupal_get_path('module', 'viewscarousel') .'/skins/ie7/skin.css');
  drupal_add_js(drupal_get_path('module', 'viewscarousel') .'/jquery.jcarousel.min.js');
  drupal_add_js(drupal_get_path('module', 'viewscarousel') .'/viewscarousel.js');
  
  $options = viewscarousel_get_options($vars);
  $view = $vars['view'];
  $vars['viewscarousel_id'] = 'viewscarousel-'. $view->name .'-'. $view->current_display;
  
  $vars['viewscarousel_class'] = viewscarousel_get_class($vars);
  
  drupal_add_js(array('viewscarousel' => array($vars['viewscarousel_id'] => $options)), 'setting');
}

/**
 * Get the options to pass to jcarousel from the settings.
 *
 * @param array $vars
 *  Variables from a _preprocess_viewscarousel_view function
 * 
 * @return array
 *  Options that can be passed to jcarousel
 */
function viewscarousel_get_options(&$vars) {
  
  $options = array();
  $options['vertical'] = $vars['options']['vertical'];
  $options['start'] = $vars['options']['start'];
  $options['scroll'] = $vars['options']['scroll'];
  $options['visible'] = $vars['options']['visible'];
  $options['animation'] = $vars['options']['animation'];
  $options['easing'] = $vars['options']['easing'];
  $options['auto'] = $vars['options']['auto'];
  $options['wrap'] = $vars['options']['wrap'];
  
  foreach ($options as $key => $value) {
    if (empty($value)) {
      unset($options[$key]);
    }
  }
  
  // Bug fix. 1 is default. If you manually set 1 an empty row is added to left side.
  if ($options['start'] == 1) unset($options['start']);
  
  return $options;
}

/**
 * Get class for skin and add css file if available
 *
 * @param array $vars
 *  Variables from a _preprocess_viewscarousel_view function
 * @return string
 *  Class name to add to ul
 */
function viewscarousel_get_class($vars) {
  switch ($vars['options']['skin']) {
    case 'ie7':
      drupal_add_css(drupal_get_path('module', 'viewscarousel') .'/skins/ie7/skin.css');
      return 'jcarousel-skin-ie7';
      break;
    case 'tango':
      drupal_add_css(drupal_get_path('module', 'viewscarousel') .'/skins/tango/skin.css');
      return 'jcarousel-skin-tango';
      break;
    default:
      return;
      break;
  }
}