/**
* (non-PHPdoc)
* @see WP_Widget::widget()
*/
function widget($args, $instance)
{
if (!$instance || (!isset($instance['slider_id']) || !$instance['slider_id'])) {
return;
}
$slider = get_post($instance['slider_id']);
if (!$slider || 'publish' != $slider->post_status && !fa_is_preview()) {
return;
}
extract($args, EXTR_SKIP);
// output HTML before widget as set by sidebar
echo $before_widget;
// output the widget title
$title = apply_filters('widget_title', $instance['title']);
if ($instance['title']) {
// output the widget title
echo $before_title . $title . $after_title;
}
$this->slider_id = $instance['slider_id'];
$this->atts = $instance;
// display the slider; assign it to widget area to be able to check into the display filter (index.php in plugin files).
fa_display_slider($instance['slider_id'], 'widget_area');
// output HTML after widget as set by sidebar
echo $after_widget;
// clear the slider id class variable
$this->slider_id = false;
$this->atts = array();
// remove the filter to avoid messing the display of the slider on other areas
remove_filter('fa_get_slider_options', array($this, 'options'), 999);
// remove show filter
remove_filter('fa_display_slider', array($this, 'overwrite_options'), 999);
}
/**
* Callback for filter fa_get_slider_options.
* When a preview is displayed, the function will overwrite
* the slider options with the options passed over $_GET
*/
public function modify_preview_options($options, $key, $slider_id)
{
// make this work only for previews
if (!fa_is_preview()) {
return $options;
}
// check that is the same slider ID
if ($slider_id != $this->slider->ID) {
return $options;
}
// On preview, force the review options instead of slider options
if (!$key) {
return $this->options;
} else {
return $this->options[$key];
}
return $options;
}
/**
* Init callback. This should be the first to start within the plugin.
*/
public function on_init()
{
// load when not in admin area
if (!is_admin()) {
// start custom post type class
parent::__construct();
// add the shortcodes
require_once fa_get_path('includes/libs/class-fa-shortcodes.php');
new FA_Shortcodes();
}
// only for admin area
if (is_admin() || fa_is_preview()) {
// localization - needed only for admin area
load_plugin_textdomain('fapro', false, dirname(plugin_basename(__FILE__)) . '/languages/');
// allow admins to manage all areas of the plugin
add_action('set_current_user', array($this, 'allow_admins'));
// add admin specific functions
require_once fa_get_path('includes/admin/functions.php');
// add administration management
require_once fa_get_path('includes/admin/libs/class-fa-admin.php');
// start the administration area
new FA_Admin();
}
}
/**
* Init callback that checks if a preview should be displayed.
* Verifies only front-end pages.
* Adds filter loop_start to display the slider preview.
*/
public function is_preview()
{
// previews not available on admin pages
if (is_admin()) {
return;
}
// check for preview variable
if (!fa_is_preview()) {
// user must be capabile of editing fa items
if (!current_user_can('edit_fa_items')) {
wp_die(__('Not allowed.', 'fapro'));
}
return;
}
check_admin_referer('fa-slider-theme-preview', 'fa-preview-nonce');
}