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<?php

/**

 * Style plugin to render each item in a slideshow.

 */

class views_slideshow_plugin_style_slideshow extends views_plugin_style {

  /**

   * Set default options.

   */

  public function option_definition() {

    $options = parent::option_definition();

    // Load all include files from views slideshow addons.

    module_load_all_includes('views_slideshow.inc');

    // Call every module using hook_views_slideshow_option_definition and merge

    // it's return value with the other default options.

    return array_merge($options, module_invoke_all('views_slideshow_option_definition'));

  }

  /**

   * Build the settings form for the view.

   */

  public function options_form(&$form, &$form_state) {

    // Include ctools dependent support.

    ctools_include('dependent');

    // Load up all views slideshow modules functions.

    module_load_all_includes('views_slideshow.inc');

    parent::options_form($form, $form_state);

    // Wrap all the form elements to help style the form.

    $form['views_slideshow_wrapper'] = array(

      '#markup' => '<div id="views-slideshow-form-wrapper">',

    );

    // Style.

    $form['slideshow_skin_header'] = array(

      '#markup' => '<h2>' . t('Style') . '</h2>',

    );

    // Get a list of all available skins.

    $skin_info = $this->views_slideshow_get_skins();

    foreach ($skin_info as $skin => $info) {

      $skins[$skin] = $info['name'];

    }

    asort($skins);

    // Create the drop down box so users can choose an available skin.

    $form['slideshow_skin'] = array(

      '#type' => 'select',

      '#title' => t('Skin'),

      '#options' => $skins,

      '#default_value' => $this->options['slideshow_skin'],

      '#description' => t('Select the skin to use for this display.  Skins allow for easily swappable layouts of things like next/prev links and thumbnails.  Note that not all skins support all widgets, so a combination of skins and widgets may lead to unpredictable results in layout.'),

    );

    // Slides.

    $form['slides_header'] = array(

      '#markup' => '<h2>' . t('Slides') . '</h2>',

    );

    // Get all slideshow types.

    $slideshows = module_invoke_all('views_slideshow_slideshow_info');

    if ($slideshows) {

      // Build our slideshow options for the form.

      $slideshow_options = array();

      foreach ($slideshows as $slideshow_id => $slideshow_info) {

        $slideshow_options[$slideshow_id] = $slideshow_info['name'];

      }

      $form['slideshow_type'] = array(

        '#type' => 'select',

        '#title' => t('Slideshow Type'),

        '#options' => $slideshow_options,

        '#default_value' => $this->options['slideshow_type'],

      );

      $arguments = array(

        &$form,

        &$form_state,

        &$this,

      );

      foreach (module_implements('views_slideshow_slideshow_type_form') as $module) {

        $form[$module] = array(

          '#type' => 'fieldset',

          '#title' => t('!module options', array('!module' => $slideshows[$module]['name'])),

          '#collapsible' => TRUE,

          '#attributes' => array('class' => array($module)),

          '#states' => array(

            'visible' => array(

              ':input[name="style_options[slideshow_type]"]' => array('value' => $module),

            ),

          ),

        );

        $function = $module . '_views_slideshow_slideshow_type_form';

        call_user_func_array($function, $arguments);

      }

    }

    else {

      $form['enable_module'] = array(

        '#markup' => t('There is no Views Slideshow plugin enabled. Go to the !modules and enable a Views Slideshow plugin module. For example Views Slideshow: Cycle.', array('!modules' => l(t('Modules Page'), 'admin/modules'))),

      );

    }

    // Widgets.

    $form['widgets_header'] = array(

      '#markup' => '<h2>' . t('Widgets') . '</h2>',

    );

    // Loop through all locations so we can add header for each location.

    $location = array('top' => t('Top'), 'bottom' => t('Bottom'));

    foreach ($location as $location_id => $location_name) {

      // Widget Header.

      $form['widgets'][$location_id]['header'] = array(

        '#markup' => '<h3>' . t('!location Widgets', array('!location' => $location_name)) . '</h3>',

      );

    }

    // Get all widgets that are registered.

    // If we have widgets then build it's form fields.

    $widgets = module_invoke_all('views_slideshow_widget_info');

    if (!empty($widgets)) {

      // Build our weight values by number of widgets.

      $weights = array();

      for ($i = 1; $i <= count($widgets); $i++) {

        $weights[$i] = $i;

      }

      // Loop through our widgets and locations to build our form values for

      // each widget.

      foreach ($widgets as $widget_id => $widget_info) {

        foreach ($location as $location_id => $location_name) {

          $widget_dependency = 'style_options[widgets][' . $location_id . '][' . $widget_id . ']';

          // Determine if a widget is compatible with a slideshow.

          $compatible_slideshows = array();

          foreach ($slideshows as $slideshow_id => $slideshow_info) {

            $is_compatible = 1;

            // Check if every required accept value in the widget has a

            // corresponding calls value in the slideshow.

            foreach ($widget_info['accepts'] as $accept_key => $accept_value) {

              if (is_array($accept_value) && !empty($accept_value['required']) && !in_array($accept_key, $slideshow_info['calls'])) {

                $is_compatible = 0;

                break;

              }

            }

            // No need to go through this if it's not compatible.

            if ($is_compatible) {

              // Check if every required calls value in the widget has a

              // corresponding accepts call.

              foreach ($widget_info['calls'] as $calls_key => $calls_value) {

                if (is_array($calls_value) && !empty($calls_value['required']) && !in_array($calls_key, $slideshow_info['accepts'])) {

                  $is_compatible = 0;

                  break;

                }

              }

            }

            // If it passed all those tests then they are compatible.

            if ($is_compatible) {

              $compatible_slideshows[] = $slideshow_id;

            }

          }

          // Use Widget Checkbox.

          $form['widgets'][$location_id][$widget_id]['enable'] = array(

            '#type' => 'checkbox',

            '#title' => $widget_info['name'],

            '#default_value' => $this->options['widgets'][$location_id][$widget_id]['enable'],

            '#description' => t('Should !name be rendered at the !location of the slides.', array('!name' => $widget_info['name'], '!location' => $location_name)),

          );

          $form['widgets'][$location_id][$widget_id]['enable']['#dependency']['edit-style-options-slideshow-type'] = !empty($compatible_slideshows) ? $compatible_slideshows : array('none');

          // Need to wrap this so it indents correctly.

          $form['widgets'][$location_id][$widget_id]['wrapper'] = array(

            '#markup' => '<div class="vs-dependent">',

          );

          // Widget weight

          // We check to see if the default value is greater than the number of

          // widgets just in case a widget has been removed and the form hasn't

          // hasn't been saved again.

          $form['widgets'][$location_id][$widget_id]['weight'] = array(

            '#type' => 'select',

            '#title' => t('Weight of the !name', array('!name' => $widget_info['name'])),

            '#default_value' => ($this->options['widgets'][$location_id][$widget_id]['weight'] > count($widgets)) ? count($widgets) : $this->options['widgets'][$location_id][$widget_id]['weight'],

            '#options' => $weights,

            '#description' => t('Determines in what order the !name appears.  A lower weight will cause the !name to be above higher weight items.', array('!name' => $widget_info['name'])),

            '#prefix' => '<div class="vs-dependent">',

            '#suffix' => '</div>',

            '#states' => array(

              'visible' => array(

                ':input[name="style_options[widgets][' . $location_id . '][' . $widget_id . '][enable]"]' => array('checked' => TRUE),

              ),

            ),

          );

          // Add all the widget settings.

          if (function_exists($widget_id . '_views_slideshow_widget_form_options')) {

            $arguments = array(

              &$form['widgets'][$location_id][$widget_id],

              &$form_state,

              &$this,

              $this->options['widgets'][$location_id][$widget_id],

              $widget_dependency,

            );

            call_user_func_array($widget_id . '_views_slideshow_widget_form_options', $arguments);

          }

          $form['widgets'][$location_id][$widget_id]['wrapper_close'] = array(

            '#markup' => '</div>',

          );

        }

      }

    }

    $form['views_slideshow_wrapper_close'] = array(

      '#markup' => '</div>',

    );

  }

  /**

   * Run any validation on the form settings.

   */

  public function options_validate(&$form, &$form_state) {

    module_load_all_includes('views_slideshow.inc');

    $arguments = array(

      &$form,

      &$form_state,

      &$this,

    );

    // Call all modules that use hook_views_slideshow_options_form_validate.

    foreach (module_implements('views_slideshow_options_form_validate') as $module) {

      $function = $module . '_views_slideshow_options_form_validate';

      call_user_func_array($function, $arguments);

    }

  }

  /**

   * Run any necessary actions on submit.

   */

  public function options_submit(&$form, &$form_state) {

    module_load_all_includes('views_slideshow.inc');

    $arguments = array(

      $form,

      &$form_state,

    );

    // Call all modules that use hook_views_slideshow_options_form_submit.

    foreach (module_implements('views_slideshow_options_form_submit') as $module) {

      $function = $module . '_views_slideshow_options_form_submit';

      call_user_func_array($function, $arguments);

    }

    // In addition to the skin, we also pre-save the definition that

    // correspond to it.  That lets us avoid a hook lookup on every page.

    $skins = $this->views_slideshow_get_skins();

    $form_state['values']['style_options']['skin_info'] = $skins[$form_state['values']['style_options']['slideshow_skin']];

  }

  /**

   * Retrieve a list of all available skins in the system.

   */

  public function views_slideshow_get_skins() {

    static $skins;

    if (empty($skins)) {

      $skins = array();

      // Call all modules that use hook_views_slideshow_skin_info.

      foreach (module_implements('views_slideshow_skin_info') as $module) {

        $skin_items = call_user_func($module . '_views_slideshow_skin_info');

        if (isset($skin_items) && is_array($skin_items)) {

          foreach (array_keys($skin_items) as $skin) {

            // Ensure that the definition is complete, so we don't need lots

            // of error checking later.

            $skin_items[$skin] += array(

              'class' => 'default',

              'name' => t('Untitled skin'),

              'module' => $module,

              'path' => '',

              'stylesheets' => array(),

            );

          }

          $skins = array_merge($skins, $skin_items);

        }

      }

    }

    return $skins;

  }

}