'widget_section', 'description' => __('Display arbitrary text or HTML on certain sections of your site.'));
$control_ops = array('width' => 400);
$this->WP_Widget('section', __('Section'), $widget_ops, $control_ops);
}
function widget( $args, $instance ) {
extract($args);
// Most of the conditional tags will always return true when passed an empty array. So we need to pad them will some junk.
$instance['special-pages'][] = -1;
$instance['pages'][] = -1;
$instance['categories'][] = -1;
$instance['tags'][] = -1;
$should_display = false;
foreach($instance['special-pages'] as $key) {
switch($key){
case "front":
if(is_front_page())
$should_display = true;
break;
case "category":
if(is_category($instance['categories']))
$should_display = true;
break;
case "tag":
if(is_tag($instance['tags']))
$should_display = true;
break;
case "date":
if(is_date())
$should_display = true;
break;
case "page":
// Exclude the front page to avoid confusion
if(!is_front_page() && is_page())
$should_display = true;
break;
case "post":
if(is_single())
$should_display = true;
break;
case "comment":
// Exclude the front page to avoid confusion
if(!is_front_page() && is_singular() && comments_open())
$should_display = true;
break;
case "author":
if(is_author())
$should_display = true;
break;
}
if($should_display) break;
}
if(!$should_display) {
if(is_page($instance['pages']))
$should_display = true;
elseif(is_singular() && in_category($instance['categories']))
$should_display = true;
elseif(is_singular() && has_tag($instance['tags']))
$should_display = true;
}
if($should_display) {
echo $before_widget;
?>
'', 'display-title' => true, 'body' => '', 'special-pages' => array(), 'pages' => array(), 'categories' => array(), 'tags' => array()) );
$title = strip_tags($instance['title']);
$display_title = (bool) $instance['display-title'];
$special_pages = $instance['special-pages'];
$pages = $instance['pages'];
$categories = $instance['categories'];
$tags = $instance['tags'];
$body = format_to_edit($instance['body']);
?>
" />
line 714 as of 2.8) and the wp_category_checklist()
function (in /wp-admin/includes/template.php -> line 490 as of 2.8) to make sense of the following code.
*/
function my_checklist($mode = 'pages', $args = '') {
switch($mode) {
case 'categories':
$defaults = array( 'selected' => array(), 'echo' => 1, 'id' => 'page_id', 'name' => 'page_id' );
$data = get_categories('get=all');
$walker = new MyCategoryChecklistWalker;
break;
case 'tags':
$defaults = array( 'selected' => array(), 'echo' => 1, 'id' => 'tag_id', 'name' => 'tag_id' );
$data = get_tags('get=all');
$walker = new MyTagChecklistWalker;
break;
case 'pages':
default:
$defaults = array( 'selected' => array(), 'echo' => 1, 'id' => 'category_id', 'name' => 'category_id' );
$data = get_pages('get=all');
$walker = new MyPageChecklistWalker;
break;
}
$r = wp_parse_args( $args, $defaults );
extract( $r, EXTR_SKIP );
if ( ! empty($data) ) {
$output = "\n";
$output .= $walker->walk($data, 0, $r);
$output .= "
\n";
} else {
$output = "No $mode found.";
}
$output = apply_filters('wp_dropdown_pages', $output);
if ( $echo ) echo $output;
return $output;
}
class MyChecklistWalker extends Walker {
function start_lvl(&$output, $depth, $args) {
$indent = str_repeat("\t", $depth);
$output .= "$indent\n";
}
function end_lvl(&$output, $depth, $args) {
$indent = str_repeat("\t", $depth);
$output .= "$indent
\n";
}
function end_el(&$output, $page, $depth, $args) {
$output .= "\n";
}
}
class MyPageChecklistWalker extends MyChecklistWalker {
var $tree_type = 'page';
var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
function start_el(&$output, $page, $depth, $args) {
extract($args);
$pad = str_repeat(' ', $depth * 4);
$id = "{$id}-{$page->ID}";
$name .= '[]';
$title = esc_html($page->post_title);
$output .= "$padID\"";
if ( in_array($page->ID, $selected) )
$output .= ' checked="checked"';
$output .= " />
\n";
}
}
class MyCategoryChecklistWalker extends MyChecklistWalker {
var $tree_type = 'category';
var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
function start_el(&$output, $category, $depth, $args) {
extract($args);
$pad = str_repeat(' ', $depth * 4);
$id = "{$id}-{$category->term_id}";
$name .= '[]';
$title = esc_html($category->name);
$output .= "$padterm_id\"";
if ( in_array($category->term_id, $selected) )
$output .= ' checked="checked"';
$output .= " />
\n";
}
}
class MyTagChecklistWalker extends Walker {
var $tree_type = 'tag';
var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
function start_el(&$output, $tag, $depth, $args) {
extract($args);
$id = "{$id}-{$tag->term_id}";
$name .= '[]';
$title = esc_html($tag->name);
$output .= "term_id\"";
if ( in_array($tag->term_id, $selected) )
$output .= ' checked="checked"';
$output .= " />
\n";
}
}
/* Finally, register this plugin/widget with wordpress. */
function widget_section_init() {
if(is_admin()) {
wp_enqueue_script('jquery-ui-tabs');
wp_enqueue_script('section-widget', plugins_url('section-widget/section-widget.js'));
wp_enqueue_style('section-widget', plugins_url('section-widget/section-widget.css'));
}
register_widget('WP_Widget_Section');
}
### Function: Init Section Widget
add_action('widgets_init', 'widget_section_init');
?>