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1 <?php |
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2 /** |
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3 * Navigation Menu template functions |
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4 * |
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5 * @package WordPress |
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6 * @subpackage Nav_Menus |
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7 * @since 3.0.0 |
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8 */ |
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9 |
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10 /** |
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11 * Create HTML list of nav menu items. |
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12 * |
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13 * @package WordPress |
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14 * @since 3.0.0 |
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15 * @uses Walker |
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16 */ |
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17 class Walker_Nav_Menu extends Walker { |
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18 /** |
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19 * @see Walker::$tree_type |
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20 * @since 3.0.0 |
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21 * @var string |
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22 */ |
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23 var $tree_type = array( 'post_type', 'taxonomy', 'custom' ); |
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24 |
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25 /** |
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26 * @see Walker::$db_fields |
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27 * @since 3.0.0 |
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28 * @todo Decouple this. |
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29 * @var array |
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30 */ |
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31 var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' ); |
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32 |
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33 /** |
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34 * @see Walker::start_lvl() |
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35 * @since 3.0.0 |
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36 * |
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37 * @param string $output Passed by reference. Used to append additional content. |
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38 * @param int $depth Depth of page. Used for padding. |
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39 */ |
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40 function start_lvl( &$output, $depth = 0, $args = array() ) { |
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41 $indent = str_repeat("\t", $depth); |
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42 $output .= "\n$indent<ul class=\"sub-menu\">\n"; |
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43 } |
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44 |
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45 /** |
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46 * @see Walker::end_lvl() |
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47 * @since 3.0.0 |
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48 * |
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49 * @param string $output Passed by reference. Used to append additional content. |
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50 * @param int $depth Depth of page. Used for padding. |
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51 */ |
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52 function end_lvl( &$output, $depth = 0, $args = array() ) { |
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53 $indent = str_repeat("\t", $depth); |
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54 $output .= "$indent</ul>\n"; |
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55 } |
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56 |
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57 /** |
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58 * @see Walker::start_el() |
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59 * @since 3.0.0 |
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60 * |
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61 * @param string $output Passed by reference. Used to append additional content. |
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62 * @param object $item Menu item data object. |
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63 * @param int $depth Depth of menu item. Used for padding. |
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64 * @param int $current_page Menu item ID. |
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65 * @param object $args |
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66 */ |
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67 function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) { |
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68 global $wp_query; |
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69 $indent = ( $depth ) ? str_repeat( "\t", $depth ) : ''; |
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70 |
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71 $class_names = $value = ''; |
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72 |
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73 $classes = empty( $item->classes ) ? array() : (array) $item->classes; |
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74 $classes[] = 'menu-item-' . $item->ID; |
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75 |
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76 $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) ); |
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77 $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : ''; |
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78 |
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79 $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args ); |
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80 $id = $id ? ' id="' . esc_attr( $id ) . '"' : ''; |
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81 |
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82 $output .= $indent . '<li' . $id . $value . $class_names .'>'; |
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83 |
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84 $attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : ''; |
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85 $attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : ''; |
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86 $attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : ''; |
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87 $attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : ''; |
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88 |
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89 $item_output = $args->before; |
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90 $item_output .= '<a'. $attributes .'>'; |
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91 $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after; |
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92 $item_output .= '</a>'; |
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93 $item_output .= $args->after; |
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94 |
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95 $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); |
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96 } |
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97 |
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98 /** |
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99 * @see Walker::end_el() |
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100 * @since 3.0.0 |
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101 * |
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102 * @param string $output Passed by reference. Used to append additional content. |
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103 * @param object $item Page data object. Not used. |
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104 * @param int $depth Depth of page. Not Used. |
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105 */ |
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106 function end_el( &$output, $item, $depth = 0, $args = array() ) { |
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107 $output .= "</li>\n"; |
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108 } |
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109 } |
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110 |
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111 /** |
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112 * Displays a navigation menu. |
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113 * |
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114 * Optional $args contents: |
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115 * |
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116 * menu - The menu that is desired. Accepts (matching in order) id, slug, name. Defaults to blank. |
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117 * menu_class - CSS class to use for the ul element which forms the menu. Defaults to 'menu'. |
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118 * menu_id - The ID that is applied to the ul element which forms the menu. Defaults to the menu slug, incremented. |
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119 * container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'. |
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120 * container_class - the class that is applied to the container. Defaults to 'menu-{menu slug}-container'. |
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121 * container_id - The ID that is applied to the container. Defaults to blank. |
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122 * fallback_cb - If the menu doesn't exists, a callback function will fire. Defaults to 'wp_page_menu'. Set to false for no fallback. |
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123 * before - Text before the link text. |
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124 * after - Text after the link text. |
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125 * link_before - Text before the link. |
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126 * link_after - Text after the link. |
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127 * echo - Whether to echo the menu or return it. Defaults to echo. |
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128 * depth - how many levels of the hierarchy are to be included. 0 means all. Defaults to 0. |
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129 * walker - allows a custom walker to be specified. |
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130 * theme_location - the location in the theme to be used. Must be registered with register_nav_menu() in order to be selectable by the user. |
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131 * items_wrap - How the list items should be wrapped. Defaults to a ul with an id and class. Uses printf() format with numbered placeholders. |
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132 * |
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133 * @since 3.0.0 |
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134 * |
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135 * @param array $args Arguments |
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136 */ |
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137 function wp_nav_menu( $args = array() ) { |
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138 static $menu_id_slugs = array(); |
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139 |
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140 $defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '', |
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141 'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>', |
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142 'depth' => 0, 'walker' => '', 'theme_location' => '' ); |
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143 |
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144 $args = wp_parse_args( $args, $defaults ); |
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145 $args = apply_filters( 'wp_nav_menu_args', $args ); |
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146 $args = (object) $args; |
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147 |
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148 // Get the nav menu based on the requested menu |
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149 $menu = wp_get_nav_menu_object( $args->menu ); |
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150 |
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151 // Get the nav menu based on the theme_location |
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152 if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) ) |
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153 $menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] ); |
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154 |
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155 // get the first menu that has items if we still can't find a menu |
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156 if ( ! $menu && !$args->theme_location ) { |
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157 $menus = wp_get_nav_menus(); |
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158 foreach ( $menus as $menu_maybe ) { |
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159 if ( $menu_items = wp_get_nav_menu_items($menu_maybe->term_id) ) { |
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160 $menu = $menu_maybe; |
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161 break; |
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162 } |
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163 } |
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164 } |
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165 |
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166 // If the menu exists, get its items. |
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167 if ( $menu && ! is_wp_error($menu) && !isset($menu_items) ) |
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168 $menu_items = wp_get_nav_menu_items( $menu->term_id ); |
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169 |
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170 // If no menu was found or if the menu has no items and no location was requested, call the fallback_cb if it exists |
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171 if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) ) |
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172 && $args->fallback_cb && is_callable( $args->fallback_cb ) ) |
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173 return call_user_func( $args->fallback_cb, (array) $args ); |
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174 |
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175 // If no fallback function was specified and the menu doesn't exists, bail. |
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176 if ( !$menu || is_wp_error($menu) ) |
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177 return false; |
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178 |
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179 $nav_menu = $items = ''; |
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180 |
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181 $show_container = false; |
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182 if ( $args->container ) { |
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183 $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) ); |
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184 if ( in_array( $args->container, $allowed_tags ) ) { |
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185 $show_container = true; |
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186 $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"'; |
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187 $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : ''; |
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188 $nav_menu .= '<'. $args->container . $id . $class . '>'; |
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189 } |
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190 } |
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191 |
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192 // Set up the $menu_item variables |
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193 _wp_menu_item_classes_by_context( $menu_items ); |
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194 |
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195 $sorted_menu_items = array(); |
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196 foreach ( (array) $menu_items as $key => $menu_item ) |
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197 $sorted_menu_items[$menu_item->menu_order] = $menu_item; |
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198 |
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199 unset($menu_items); |
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200 |
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201 $sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args ); |
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202 |
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203 $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args ); |
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204 unset($sorted_menu_items); |
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205 |
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206 // Attributes |
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207 if ( ! empty( $args->menu_id ) ) { |
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208 $wrap_id = $args->menu_id; |
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209 } else { |
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210 $wrap_id = 'menu-' . $menu->slug; |
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211 while ( in_array( $wrap_id, $menu_id_slugs ) ) { |
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212 if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) ) |
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213 $wrap_id = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $wrap_id ); |
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214 else |
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215 $wrap_id = $wrap_id . '-1'; |
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216 } |
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217 } |
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218 $menu_id_slugs[] = $wrap_id; |
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219 |
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220 $wrap_class = $args->menu_class ? $args->menu_class : ''; |
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221 |
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222 // Allow plugins to hook into the menu to add their own <li>'s |
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223 $items = apply_filters( 'wp_nav_menu_items', $items, $args ); |
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224 $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |
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225 |
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226 $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items ); |
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227 unset( $items ); |
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228 |
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229 if ( $show_container ) |
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230 $nav_menu .= '</' . $args->container . '>'; |
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231 |
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232 $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
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233 |
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234 if ( $args->echo ) |
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235 echo $nav_menu; |
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236 else |
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237 return $nav_menu; |
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238 } |
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239 |
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240 /** |
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241 * Add the class property classes for the current context, if applicable. |
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242 * |
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243 * @access private |
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244 * @since 3.0 |
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245 * |
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246 * @param array $menu_items The current menu item objects to which to add the class property information. |
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247 */ |
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248 function _wp_menu_item_classes_by_context( &$menu_items ) { |
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249 global $wp_query; |
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250 |
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251 $queried_object = $wp_query->get_queried_object(); |
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252 $queried_object_id = (int) $wp_query->queried_object_id; |
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253 |
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254 $active_object = ''; |
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255 $active_ancestor_item_ids = array(); |
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256 $active_parent_item_ids = array(); |
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257 $active_parent_object_ids = array(); |
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258 $possible_taxonomy_ancestors = array(); |
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259 $possible_object_parents = array(); |
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260 $home_page_id = (int) get_option( 'page_for_posts' ); |
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261 |
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262 if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) { |
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263 foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) { |
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264 if ( is_taxonomy_hierarchical( $taxonomy ) ) { |
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265 $term_hierarchy = _get_term_hierarchy( $taxonomy ); |
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266 $terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) ); |
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267 if ( is_array( $terms ) ) { |
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268 $possible_object_parents = array_merge( $possible_object_parents, $terms ); |
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269 $term_to_ancestor = array(); |
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270 foreach ( (array) $term_hierarchy as $anc => $descs ) { |
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271 foreach ( (array) $descs as $desc ) |
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272 $term_to_ancestor[ $desc ] = $anc; |
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273 } |
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274 |
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275 foreach ( $terms as $desc ) { |
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276 do { |
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277 $possible_taxonomy_ancestors[ $taxonomy ][] = $desc; |
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278 if ( isset( $term_to_ancestor[ $desc ] ) ) { |
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279 $_desc = $term_to_ancestor[ $desc ]; |
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280 unset( $term_to_ancestor[ $desc ] ); |
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281 $desc = $_desc; |
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282 } else { |
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283 $desc = 0; |
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284 } |
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285 } while ( ! empty( $desc ) ); |
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286 } |
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287 } |
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288 } |
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289 } |
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290 } elseif ( ! empty( $queried_object->post_type ) && is_post_type_hierarchical( $queried_object->post_type ) ) { |
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291 _get_post_ancestors( $queried_object ); |
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292 } elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) { |
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293 $term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy ); |
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294 $term_to_ancestor = array(); |
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295 foreach ( (array) $term_hierarchy as $anc => $descs ) { |
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296 foreach ( (array) $descs as $desc ) |
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297 $term_to_ancestor[ $desc ] = $anc; |
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298 } |
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299 $desc = $queried_object->term_id; |
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300 do { |
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301 $possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc; |
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302 if ( isset( $term_to_ancestor[ $desc ] ) ) { |
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303 $_desc = $term_to_ancestor[ $desc ]; |
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304 unset( $term_to_ancestor[ $desc ] ); |
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305 $desc = $_desc; |
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306 } else { |
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307 $desc = 0; |
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308 } |
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309 } while ( ! empty( $desc ) ); |
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310 } |
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311 |
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312 $possible_object_parents = array_filter( $possible_object_parents ); |
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313 |
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314 $front_page_url = home_url(); |
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315 |
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316 foreach ( (array) $menu_items as $key => $menu_item ) { |
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317 |
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318 $menu_items[$key]->current = false; |
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319 |
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320 $classes = (array) $menu_item->classes; |
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321 $classes[] = 'menu-item'; |
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322 $classes[] = 'menu-item-type-' . $menu_item->type; |
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323 $classes[] = 'menu-item-object-' . $menu_item->object; |
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324 |
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325 // if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object |
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326 if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) { |
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327 $active_parent_object_ids[] = (int) $menu_item->object_id; |
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328 $active_parent_item_ids[] = (int) $menu_item->db_id; |
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329 $active_object = $queried_object->post_type; |
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330 |
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331 // if the menu item corresponds to the currently-queried post or taxonomy object |
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332 } elseif ( |
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333 $menu_item->object_id == $queried_object_id && |
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334 ( |
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335 ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) || |
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336 ( 'post_type' == $menu_item->type && $wp_query->is_singular ) || |
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337 ( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) ) |
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338 ) |
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339 ) { |
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340 $classes[] = 'current-menu-item'; |
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341 $menu_items[$key]->current = true; |
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342 $_anc_id = (int) $menu_item->db_id; |
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343 |
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344 while( |
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345 ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) && |
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346 ! in_array( $_anc_id, $active_ancestor_item_ids ) |
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347 ) { |
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348 $active_ancestor_item_ids[] = $_anc_id; |
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349 } |
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350 |
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351 if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) { |
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352 // Back compat classes for pages to match wp_page_menu() |
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353 $classes[] = 'page_item'; |
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354 $classes[] = 'page-item-' . $menu_item->object_id; |
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355 $classes[] = 'current_page_item'; |
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356 } |
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357 $active_parent_item_ids[] = (int) $menu_item->menu_item_parent; |
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358 $active_parent_object_ids[] = (int) $menu_item->post_parent; |
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359 $active_object = $menu_item->object; |
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360 |
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361 // if the menu item corresponds to the currently-requested URL |
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362 } elseif ( 'custom' == $menu_item->object ) { |
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363 $_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] ); |
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364 $current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_root_relative_current; |
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365 $raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url; |
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366 $item_url = untrailingslashit( $raw_item_url ); |
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367 $_indexless_current = untrailingslashit( preg_replace( '/index.php$/', '', $current_url ) ); |
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368 |
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369 if ( $raw_item_url && in_array( $item_url, array( $current_url, $_indexless_current, $_root_relative_current ) ) ) { |
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370 $classes[] = 'current-menu-item'; |
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371 $menu_items[$key]->current = true; |
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372 $_anc_id = (int) $menu_item->db_id; |
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373 |
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374 while( |
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375 ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) && |
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376 ! in_array( $_anc_id, $active_ancestor_item_ids ) |
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377 ) { |
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378 $active_ancestor_item_ids[] = $_anc_id; |
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379 } |
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380 |
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381 if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) { |
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382 // Back compat for home link to match wp_page_menu() |
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383 $classes[] = 'current_page_item'; |
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384 } |
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385 $active_parent_item_ids[] = (int) $menu_item->menu_item_parent; |
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386 $active_parent_object_ids[] = (int) $menu_item->post_parent; |
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387 $active_object = $menu_item->object; |
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388 |
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389 // give front page item current-menu-item class when extra query arguments involved |
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390 } elseif ( $item_url == $front_page_url && is_front_page() ) { |
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391 $classes[] = 'current-menu-item'; |
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392 } |
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393 |
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394 if ( untrailingslashit($item_url) == home_url() ) |
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395 $classes[] = 'menu-item-home'; |
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396 } |
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397 |
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398 // back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query |
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399 if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id ) |
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400 $classes[] = 'current_page_parent'; |
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401 |
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402 $menu_items[$key]->classes = array_unique( $classes ); |
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403 } |
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404 $active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) ); |
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405 $active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) ); |
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406 $active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) ); |
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407 |
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408 // set parent's class |
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409 foreach ( (array) $menu_items as $key => $parent_item ) { |
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410 $classes = (array) $parent_item->classes; |
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411 $menu_items[$key]->current_item_ancestor = false; |
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412 $menu_items[$key]->current_item_parent = false; |
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413 |
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414 if ( |
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415 isset( $parent_item->type ) && |
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416 ( |
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417 // ancestral post object |
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418 ( |
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419 'post_type' == $parent_item->type && |
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420 ! empty( $queried_object->post_type ) && |
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421 is_post_type_hierarchical( $queried_object->post_type ) && |
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422 in_array( $parent_item->object_id, $queried_object->ancestors ) && |
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423 $parent_item->object != $queried_object->ID |
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424 ) || |
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425 |
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426 // ancestral term |
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427 ( |
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428 'taxonomy' == $parent_item->type && |
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429 isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) && |
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430 in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) && |
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431 ( |
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432 ! isset( $queried_object->term_id ) || |
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433 $parent_item->object_id != $queried_object->term_id |
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434 ) |
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435 ) |
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436 ) |
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437 ) { |
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438 $classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor'; |
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439 } |
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440 |
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441 if ( in_array( intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) { |
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442 $classes[] = 'current-menu-ancestor'; |
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443 $menu_items[$key]->current_item_ancestor = true; |
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444 } |
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445 if ( in_array( $parent_item->db_id, $active_parent_item_ids ) ) { |
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446 $classes[] = 'current-menu-parent'; |
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447 $menu_items[$key]->current_item_parent = true; |
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448 } |
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449 if ( in_array( $parent_item->object_id, $active_parent_object_ids ) ) |
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450 $classes[] = 'current-' . $active_object . '-parent'; |
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451 |
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452 if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) { |
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453 // Back compat classes for pages to match wp_page_menu() |
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454 if ( in_array('current-menu-parent', $classes) ) |
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455 $classes[] = 'current_page_parent'; |
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456 if ( in_array('current-menu-ancestor', $classes) ) |
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457 $classes[] = 'current_page_ancestor'; |
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458 } |
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459 |
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460 $menu_items[$key]->classes = array_unique( $classes ); |
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461 } |
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462 } |
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463 |
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464 /** |
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465 * Retrieve the HTML list content for nav menu items. |
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466 * |
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467 * @uses Walker_Nav_Menu to create HTML list content. |
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468 * @since 3.0.0 |
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469 * @see Walker::walk() for parameters and return description. |
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470 */ |
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471 function walk_nav_menu_tree( $items, $depth, $r ) { |
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472 $walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker; |
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473 $args = array( $items, $depth, $r ); |
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474 |
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475 return call_user_func_array( array(&$walker, 'walk'), $args ); |
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476 } |
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477 |
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478 /** |
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479 * Prevents a menu item ID from being used more than once. |
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480 * |
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481 * @since 3.0.1 |
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482 * @access private |
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483 */ |
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484 function _nav_menu_item_id_use_once( $id, $item ) { |
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485 static $_used_ids = array(); |
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486 if ( in_array( $item->ID, $_used_ids ) ) |
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487 return ''; |
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488 $_used_ids[] = $item->ID; |
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489 return $id; |
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490 } |
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491 add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 ); |