Viewing file:  walker-dropdown.php (2.74 KB) -rw-r--r--
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<?php
/**
* displays languages in a dropdown list
*
* @since 1.2
*/
class PLL_Walker_Dropdown extends Walker {
var $db_fields = array( 'parent' => 'parent', 'id' => 'id' );
/**
* outputs one element
*
* @since 1.2
*
* @see Walker::start_el
*/
function start_el( &$output, $element, $depth = 0, $args = array(), $current_object_id = 0 ) {
$value = $args['value'];
$output .= sprintf(
"\t".'<option value="%1$s"%2$s%3$s>%4$s</option>'."\n",
esc_attr( $element->$value ),
empty( $element->locale ) ? '' : sprintf( ' lang="%s"', esc_attr( $element->locale ) ),
isset( $args['selected'] ) && $args['selected'] === $element->$value ? ' selected="selected"' : '',
esc_html( $element->name )
);
}
/**
* overrides Walker::display_element as expects an object with a parent property
*
* @since 1.2
*
* @see Walker::display_element
*/
function display_element( $element, &$children_elements, $max_depth, $depth = 0, $args, &$output ) {
$element = (object) $element; // make sure we have an object
$element->parent = $element->id = 0; // don't care about this
parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
}
/**
* starts the output of the dropdown list
*
* @since 1.2
*
* list of parameters accepted in $args:
*
* flag => display the selected language flag in front of the dropdown if set to 1, defaults to 0
* value => the language field to use as value attribute, defaults to 'slug'
* selected => the selected value, mandatory
* name => the select name attribute, defaults to 'lang_choice'
* id => the select id attribute, defaults to $args['name']
* class => the class attribute
* disabled => disables the dropdown if set to 1
*
* @param array $elements elements to display
* @param array $args
* @return string
*/
function walk( $elements, $args = array() ) {
$output = '';
$args = wp_parse_args( $args, array( 'value' => 'slug', 'name' => 'lang_choice' ) );
if ( ! empty( $args['flag'] ) ) {
$current = wp_list_filter( $elements, array( $args['value'] => $args['selected'] ) );
$lang = reset( $current );
$output = sprintf(
'<span class="pll-select-flag">%s</span>',
empty( $lang->flag ) ? esc_html( $lang->slug ) : $lang->flag
);
}
$output .= sprintf(
'<select name="%1$s"%2$s%3$s%4$s>' . "\n" . '%5$s' . "\n" . '</select>'."\n",
$name = esc_attr( $args['name'] ),
isset( $args['id'] ) && ! $args['id'] ? '' : ' id="' . ( empty( $args['id'] ) ? $name : esc_attr( $args['id'] ) ) . '"',
empty( $args['class'] ) ? '' : ' class="' . esc_attr( $args['class'] ) . '"',
empty( $args['disabled'] ) ? '' : ' disabled="disabled"',
parent::walk( $elements, -1, $args )
);
return $output;
}
}
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