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philgyford/list-custom-taxonomy-widget.php

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A modified version of the WordPress List Custom Taxonomy Widget plugin, to enable limiting the number of items shown
Raw
list-custom-taxonomy-widget.php
<?php
/**
* Plugin Name: List Custom Taxonomy Widget
* Plugin URI: http://celloexpressions.com/plugins/list-custom-taxonomy-widget
* Description: Widget that displays category listings for custom post types (custom taxonomies).
* Version: 4.1
* Author: Nick Halsey
* Author URI: http://celloexpressions.com/
* Tags: custom taxonomy, custom tax, widget, sidebar, category, categories, taxonomy, custom category, custom categories, post types, custom post types, custom post type categories
* License: GPL
NOTE: This file has been updated since version 4.1 to add the ability to limit the
number of items shown. It is not an authorised change and is experimental.
Phil Gyford <phil@gyford.com>, 2020.
=====================================================================================
Copyright (C) 2016 Nick Halsey
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
=====================================================================================
*/
// Register 'List Custom Taxonomy' widget
add_action( 'widgets_init', 'init_lc_taxonomy' );
function init_lc_taxonomy() { return register_widget('lc_taxonomy'); }
class lc_taxonomy extends WP_Widget {
/** constructor */
function __construct() {
parent::__construct( 'lc_taxonomy', $name = 'List Custom Taxonomy', array(
'customize_selective_refresh' => true,
) );
}
/**
* This is the Widget
**/
function widget( $args, $instance ) {
global $post;
extract($args);
// Widget options
if ( array_key_exists( 'title', $instance ) ) {
$title = apply_filters('widget_title', $instance['title'] ); // Title
} else {
$title = '';
}
if ( array_key_exists( 'taxonomy', $instance ) ) {
$this_taxonomy = $instance['taxonomy']; // Taxonomy to show
} else {
$this_taxonomy = '';
}
$hierarchical = !empty( $instance['hierarchical'] ) ? '1' : '0';
$inv_empty = !empty( $instance['empty'] ) ? '0' : '1'; // invert to go from UI's "show empty" to WP's "hide empty"
$showcount = !empty( $instance['count'] ) ? '1' : '0';
if( array_key_exists('orderby',$instance) ){
$orderby = $instance['orderby'];
}
else{
$orderby = 'count';
}
if( array_key_exists('ascdsc',$instance) ){
$ascdsc = $instance['ascdsc'];
}
else{
$ascdsc = 'desc';
}
if( array_key_exists('exclude',$instance) ){
$exclude = $instance['exclude'];
}
else {
$exclude = '';
}
if( array_key_exists('childof',$instance) ){
$childof = $instance['childof'];
}
else {
$childof = '';
}
if( array_key_exists('dropdown',$instance) ){
$dropdown = $instance['dropdown'];
}
else {
$dropdown = false;
}
if( array_key_exists('number',$instance)){
$number = intval($instance['number']);
}
else {
$number = null;
}
// Dropdown doesn't work for built-in taxonomies.
$builtin = array( 'post_tag', 'post_format', 'category' );
if ( $dropdown && in_array( $this_taxonomy, $builtin ) ) {
$dropdown = false;
}
// Output
$tax = $this_taxonomy;
echo $before_widget;
echo '<div id="lct-widget-'.$tax.'-container" class="list-custom-taxonomy-widget">';
if ( $title ) echo $before_title . $title . $after_title;
if($dropdown){
$taxonomy_object = get_taxonomy( $tax );
if( in_array( $tax, array( 'category', 'post_tag', 'post_format' ) ) )
$walker = '';
else
$walker = new lctwidget_Taxonomy_Dropdown_Walker();
$args = array(
'show_option_all' => false,
'show_option_none' => '',
'orderby' => 'RANDOM()',//$orderby,
'order' => $ascdsc,
'show_count' => $showcount,
'hide_empty' => $inv_empty,
'child_of' => $childof,
'exclude' => $exclude,
'echo' => 1,
//'selected' => 0,
'hierarchical' => $hierarchical,
'name' => $taxonomy_object->query_var,
'id' => 'lct-widget-'.$tax,
//'class' => 'postform',
'depth' => 0,
//'tab_index' => 0,
'taxonomy' => $tax,
'hide_if_empty' => true,
'walker' => $walker,
'number' => $number,
);
echo '<form action="'. get_bloginfo('url'). '" method="get">';
wp_dropdown_categories($args);
echo '<input type="submit" value="go &raquo;" /></form>';
}
else {
$args = array(
'show_option_all' => false,
'orderby' => $orderby,
'order' => $ascdsc,
'style' => 'list',
'show_count' => $showcount,
'hide_empty' => $inv_empty,
'use_desc_for_title' => 1,
'child_of' => $childof,
//'feed' => '',
//'feed_type' => '',
//'feed_image' => '',
'exclude' => $exclude,
//'exclude_tree' => '',
//'include' => '',
'hierarchical' => $hierarchical,
'title_li' => '',
'show_option_none' => 'No Categories',
'number' => $number,
'echo' => 1,
'depth' => 0,
//'current_category' => 0,
//'pad_counts' => 0,
'taxonomy' => $tax,
'walker' => null
);
echo '<ul id="lct-widget-'.$tax.'">';
wp_list_categories($args);
echo '</ul>';
}
echo '</div>';
echo $after_widget;
}
/** Widget control update */
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title'] = strip_tags( $new_instance['title'] );
$instance['taxonomy'] = strip_tags( $new_instance['taxonomy'] );
$instance['orderby'] = $new_instance['orderby'];
$instance['ascdsc'] = $new_instance['ascdsc'];
$instance['exclude'] = $new_instance['exclude'];
$instance['number'] = $new_instance['number'];
$instance['expandoptions'] = $new_instance['expandoptions'];
$instance['childof'] = $new_instance['childof'];
$instance['hierarchical'] = !empty($new_instance['hierarchical']) ? 1 : 0;
$instance['empty'] = !empty($new_instance['empty']) ? 1 : 0;
$instance['count'] = !empty($new_instance['count']) ? 1 : 0;
$instance['dropdown'] = !empty($new_instance['dropdown']) ? 1 : 0;
return $instance;
}
/**
* Widget settings
**/
function form( $instance ) {
//for showing/hiding advanced options; wordpress moves this script to where it needs to go
wp_enqueue_script('jquery');
?><script>
jQuery(document).ready(function(){
var status = jQuery('#<?php echo $this->get_field_id('expandoptions'); ?>').val();
if ( status === 'expand' ) {
jQuery('.lctw-expand-options').hide();
jQuery('.lctw-all-options').show();
} else {
jQuery('.lctw-all-options').hide();
}
});
function lctwExpand(id){
jQuery('#' + id).val('expand');
jQuery('.lctw-all-options').show(500);
jQuery('.lctw-expand-options').hide(500);
}
function lctwContract(id){
jQuery('#' + id).val('contract');
jQuery('.lctw-all-options').hide(500);
jQuery('.lctw-expand-options').show(500);
}
</script><?php
// instance exist? if not set defaults
if ( $instance ) {
$title = $instance['title'];
$this_taxonomy = $instance['taxonomy'];
$orderby = $instance['orderby'];
$ascdsc = $instance['ascdsc'];
$exclude = $instance['exclude'];
$number = $instance['number'];
$expandoptions = $instance['expandoptions'];
$childof = $instance['childof'];
$showcount = isset($instance['count']) ? (bool) $instance['count'] :false;
$hierarchical = isset( $instance['hierarchical'] ) ? (bool) $instance['hierarchical'] : false;
$empty = isset( $instance['empty'] ) ? (bool) $instance['empty'] : false;
$dropdown = isset( $instance['dropdown'] ) ? (bool) $instance['dropdown'] : false;
} else {
//These are our defaults
$title = '';
$orderby = 'count';
$ascdsc = 'desc';
$exclude = '';
$number = '';
$expandoptions = 'contract';
$childof = '';
$this_taxonomy = 'category';//this will display the category taxonomy, which is used for normal, built-in posts
$hierarchical = true;
$showcount = true;
$empty = false;
$dropdown = false;
}
// The widget form ?>
<p>
<label for="<?php echo $this->get_field_id('title'); ?>"><?php echo __( 'Title:' ); ?></label>
<input id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" class="widefat" />
</p>
<p>
<label for="<?php echo $this->get_field_id('taxonomy'); ?>"><?php echo __( 'Select Taxonomy:' ); ?></label>
<select name="<?php echo $this->get_field_name('taxonomy'); ?>" id="<?php echo $this->get_field_id('taxonomy'); ?>" class="widefat" style="height: auto;" size="4">
<?php
$args=array(
'public' => true,
'_builtin' => false //these are manually added to the array later
);
$output = 'names'; // or objects
$operator = 'and'; // 'and' or 'or'
$taxonomies=get_taxonomies($args,$output,$operator);
$taxonomies[] = 'category';
$taxonomies[] = 'post_tag';
$taxonomies[] = 'post_format';
foreach ($taxonomies as $taxonomy ) { ?>
<option value="<?php echo $taxonomy; ?>" <?php if( $taxonomy == $this_taxonomy ) { echo 'selected="selected"'; } ?>><?php echo $taxonomy;?></option>
<?php } ?>
</select>
</p>
<h4 class="lctw-expand-options"><a href="javascript:void(0)" onclick="lctwExpand('<?php echo $this->get_field_id('expandoptions'); ?>')" >More Options...</a></h4>
<div class="lctw-all-options">
<h4 class="lctw-contract-options"><a href="javascript:void(0)" onclick="lctwContract('<?php echo $this->get_field_id('expandoptions'); ?>')" >Hide Extended Options</a></h4>
<input type="hidden" value="<?php echo $expandoptions; ?>" id="<?php echo $this->get_field_id('expandoptions'); ?>" name="<?php echo $this->get_field_name('expandoptions'); ?>" />
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('count'); ?>" name="<?php echo $this->get_field_name('count'); ?>"<?php checked( $showcount ); ?> />
<label for="<?php echo $this->get_field_id('count'); ?>"><?php _e( 'Show Post Counts' ); ?></label><br />
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('hierarchical'); ?>" name="<?php echo $this->get_field_name('hierarchical'); ?>"<?php checked( $hierarchical ); ?> />
<label for="<?php echo $this->get_field_id('hierarchical'); ?>"><?php _e( 'Show Hierarchy' ); ?></label><br/>
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('empty'); ?>" name="<?php echo $this->get_field_name('empty'); ?>"<?php checked( $empty ); ?> />
<label for="<?php echo $this->get_field_id('empty'); ?>"><?php _e( 'Show Empty Terms' ); ?></label></p>
<p>
<label for="<?php echo $this->get_field_id('orderby'); ?>"><?php echo __( 'Order By:' ); ?></label>
<select name="<?php echo $this->get_field_name('orderby'); ?>" id="<?php echo $this->get_field_id('orderby'); ?>" class="widefat" >
<option value="ID" <?php if( $orderby == 'ID' ) { echo 'selected="selected"'; } ?>>ID</option>
<option value="name" <?php if( $orderby == 'name' ) { echo 'selected="selected"'; } ?>>Name</option>
<option value="slug" <?php if( $orderby == 'slug' ) { echo 'selected="selected"'; } ?>>Slug</option>
<option value="count" <?php if( $orderby == 'count' ) { echo 'selected="selected"'; } ?>>Count</option>
<option value="term_group" <?php if( $orderby == 'term_group' ) { echo 'selected="selected"'; } ?>>Term Group</option>
</select>
</p>
<p>
<label><input type="radio" name="<?php echo $this->get_field_name('ascdsc'); ?>" value="asc" <?php if( $ascdsc == 'asc' ) { echo 'checked'; } ?>/> Ascending</label><br/>
<label><input type="radio" name="<?php echo $this->get_field_name('ascdsc'); ?>" value="desc" <?php if( $ascdsc == 'desc' ) { echo 'checked'; } ?>/> Descending</label>
</p>
<p>
<label for="<?php echo $this->get_field_id('exclude'); ?>">Exclude (comma-separated list of ids to exclude)</label><br/>
<input type="text" class="widefat" name="<?php echo $this->get_field_name('exclude'); ?>" value="<?php echo $exclude; ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('exclude'); ?>">Only Show Children of (category id)</label><br/>
<input type="text" class="widefat" name="<?php echo $this->get_field_name('childof'); ?>" value="<?php echo $childof; ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('number'); ?>">Number to show (leave empty for all)</label><br/>
<input type="text" class="widefat" name="<?php echo $this->get_field_name('number'); ?>" value="<?php echo $number; ?>" />
</p>
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('dropdown'); ?>" name="<?php echo $this->get_field_name('dropdown'); ?>"<?php checked( $dropdown ); ?> />
<label for="<?php echo $this->get_field_id('dropdown'); ?>"><?php _e( 'Display as Dropdown' ); ?></label></p>
</div>
<?php
}
} // class lc_taxonomy
/* Custom version of Walker_CategoryDropdown */
class lctwidget_Taxonomy_Dropdown_Walker extends Walker {
var $tree_type = 'category';
var $db_fields = array ( 'id' => 'term_id', 'parent' => 'parent' );
function start_el( &$output, $term, $depth = 0, $args = array(), $current_object_id = 0 ) {
$term = get_term( $term, $term->taxonomy );
$term_slug = $term->slug;
$text = str_repeat( '&nbsp;', $depth * 3 ) . $term->name;
if ( $args['show_count'] ) {
$text .= '&nbsp;('. $term->count .')';
}
$class_name = 'level-' . $depth;
$output.= "\t" . '<option' . ' class="' . esc_attr( $class_name ) . '" value="' . esc_attr( $term_slug ) . '">' . esc_html( $text ) . '</option>' . "\n";
}
}
?>
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