1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
<?php
/**
* Taxonomy API: Walker_Category class
*
* @package WordPress
* @subpackage Template
* @since 4.4.0
*/
/**
* Core class used to create an HTML list of categories.
*
* @since 2.1.0
*
* @see Walker
*/
class Walker_Category extends Walker {
/**
* What the class handles.
*
* @since 2.1.0
* @var string
*
* @see Walker::$tree_type
*/
public $tree_type = 'category';
/**
* Database fields to use.
*
* @since 2.1.0
* @var array
*
* @see Walker::$db_fields
* @todo Decouple this
*/
public $db_fields = array(
'parent' => 'parent',
'id' => 'term_id',
);
/**
* Starts the list before the elements are added.
*
* @since 2.1.0
*
* @see Walker::start_lvl()
*
* @param string $output Used to append additional content. Passed by reference.
* @param int $depth Optional. Depth of category. Used for tab indentation. Default 0.
* @param array $args Optional. An array of arguments. Will only append content if style argument
* value is 'list'. See wp_list_categories(). Default empty array.
*/
public function start_lvl( &$output, $depth = 0, $args = array() ) {
if ( 'list' != $args['style'] ) {
return;
}
$indent = str_repeat( "\t", $depth );
$output .= "$indent<ul class='children'>\n";
}
/**
* Ends the list of after the elements are added.
*
* @since 2.1.0
*
* @see Walker::end_lvl()
*
* @param string $output Used to append additional content. Passed by reference.
* @param int $depth Optional. Depth of category. Used for tab indentation. Default 0.
* @param array $args Optional. An array of arguments. Will only append content if style argument
* value is 'list'. See wp_list_categories(). Default empty array.
*/
public function end_lvl( &$output, $depth = 0, $args = array() ) {
if ( 'list' != $args['style'] ) {
return;
}
$indent = str_repeat( "\t", $depth );
$output .= "$indent</ul>\n";
}
/**
* Starts the element output.
*
* @since 2.1.0
*
* @see Walker::start_el()
*
* @param string $output Used to append additional content (passed by reference).
* @param object $category Category data object.
* @param int $depth Optional. Depth of category in reference to parents. Default 0.
* @param array $args Optional. An array of arguments. See wp_list_categories(). Default empty array.
* @param int $id Optional. ID of the current category. Default 0.
*/
public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
/** This filter is documented in wp-includes/category-template.php */
$cat_name = apply_filters(
'list_cats',
esc_attr( $category->name ),
$category
);
// Don't generate an element if the category name is empty.
if ( '' === $cat_name ) {
return;
}
$atts = array();
$atts['href'] = get_term_link( $category );
if ( $args['use_desc_for_title'] && ! empty( $category->description ) ) {
/**
* Filters the category description for display.
*
* @since 1.2.0
*
* @param string $description Category description.
* @param object $category Category object.
*/
$atts['title'] = strip_tags( apply_filters( 'category_description', $category->description, $category ) );
}
/**
* Filters the HTML attributes applied to a category list item's anchor element.
*
* @since 5.2.0
*
* @param array $atts {
* The HTML attributes applied to the list item's `<a>` element, empty strings are ignored.
*
* @type string $href The href attribute.
* @type string $title The title attribute.
* }
* @param WP_Term $category Term data object.
* @param int $depth Depth of category, used for padding.
* @param array $args An array of arguments.
* @param int $id ID of the current category.
*/
$atts = apply_filters( 'category_list_link_attributes', $atts, $category, $depth, $args, $id );
$attributes = '';
foreach ( $atts as $attr => $value ) {
if ( ! empty( $value ) ) {
$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
$attributes .= ' ' . $attr . '="' . $value . '"';
}
}
$link = sprintf(
'<a%s>%s</a>',
$attributes,
$cat_name
);
if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) {
$link .= ' ';
if ( empty( $args['feed_image'] ) ) {
$link .= '(';
}
$link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $args['feed_type'] ) ) . '"';
if ( empty( $args['feed'] ) ) {
/* translators: %s: category name */
$alt = ' alt="' . sprintf( __( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
} else {
$alt = ' alt="' . $args['feed'] . '"';
$name = $args['feed'];
$link .= empty( $args['title'] ) ? '' : $args['title'];
}
$link .= '>';
if ( empty( $args['feed_image'] ) ) {
$link .= $name;
} else {
$link .= "<img src='" . esc_url( $args['feed_image'] ) . "'$alt" . ' />';
}
$link .= '</a>';
if ( empty( $args['feed_image'] ) ) {
$link .= ')';
}
}
if ( ! empty( $args['show_count'] ) ) {
$link .= ' (' . number_format_i18n( $category->count ) . ')';
}
if ( 'list' == $args['style'] ) {
$output .= "\t<li";
$css_classes = array(
'cat-item',
'cat-item-' . $category->term_id,
);
if ( ! empty( $args['current_category'] ) ) {
// 'current_category' can be an array, so we use `get_terms()`.
$_current_terms = get_terms(
$category->taxonomy,
array(
'include' => $args['current_category'],
'hide_empty' => false,
)
);
foreach ( $_current_terms as $_current_term ) {
if ( $category->term_id == $_current_term->term_id ) {
$css_classes[] = 'current-cat';
} elseif ( $category->term_id == $_current_term->parent ) {
$css_classes[] = 'current-cat-parent';
}
while ( $_current_term->parent ) {
if ( $category->term_id == $_current_term->parent ) {
$css_classes[] = 'current-cat-ancestor';
break;
}
$_current_term = get_term( $_current_term->parent, $category->taxonomy );
}
}
}
/**
* Filters the list of CSS classes to include with each category in the list.
*
* @since 4.2.0
*
* @see wp_list_categories()
*
* @param array $css_classes An array of CSS classes to be applied to each list item.
* @param object $category Category data object.
* @param int $depth Depth of page, used for padding.
* @param array $args An array of wp_list_categories() arguments.
*/
$css_classes = implode( ' ', apply_filters( 'category_css_class', $css_classes, $category, $depth, $args ) );
$css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : '';
$output .= $css_classes;
$output .= ">$link\n";
} elseif ( isset( $args['separator'] ) ) {
$output .= "\t$link" . $args['separator'] . "\n";
} else {
$output .= "\t$link<br />\n";
}
}
/**
* Ends the element output, if needed.
*
* @since 2.1.0
*
* @see Walker::end_el()
*
* @param string $output Used to append additional content (passed by reference).
* @param object $page Not used.
* @param int $depth Optional. Depth of category. Not used.
* @param array $args Optional. An array of arguments. Only uses 'list' for whether should append
* to output. See wp_list_categories(). Default empty array.
*/
public function end_el( &$output, $page, $depth = 0, $args = array() ) {
if ( 'list' != $args['style'] ) {
return;
}
$output .= "</li>\n";
}
}
|
