wp_dropdown_pages() and walk_page_tree()
git-svn-id: http://svn.automattic.com/wordpress/trunk@3573 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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ryan
parent
be1f99d329
commit
803c970527
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@ -745,6 +745,84 @@ function &get_page(&$page, $output = OBJECT) {
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}
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}
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function walk_page_tree($pages, $to_depth, $start_element_callback, $end_element_callback = '', $start_level_callback = '', $end_level_callback = '') {
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$args = array_slice(func_get_args(), 6);
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$parents = array();
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$depth = 0;
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$previous_page = '';
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$output = '';
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$last_page->post_parent = 0;
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$last_page->post_id = 0;
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$pages[] = $last_page;
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foreach ( $pages as $page ) {
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if ( !empty($previous_page) && ($page->post_parent == $previous_page->ID) ) {
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// Previous page is my parent. Descend a level.
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array_unshift($parents, $page);
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$depth++;
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if ( !$to_depth || ($depth < $to_depth) )
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if ( !empty($start_level_callback) ) {
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$cb_args = array_merge( array($output, $depth), $args);
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$output = call_user_func_array($start_level_callback, $cb_args);
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}
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} else if ( $depth && ($page->post_parent == $parents[0]->ID) ) {
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// On the same level as previous page.
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if ( !$to_depth || ($depth < $to_depth) ) {
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if ( !empty($end_element_callback) ) {
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$cb_args = array_merge( array($output, $previous_page, $depth), $args);
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$output = call_user_func_array($end_element_callback, $cb_args);
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}
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}
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} else if ( $depth ) {
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// Ascend one or more levels.
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if ( !$to_depth || ($depth < $to_depth) ) {
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if ( !empty($end_element_callback) ) {
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$cb_args = array_merge( array($output, $previous_page, $depth), $args);
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$output = call_user_func_array($end_element_callback, $cb_args);
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}
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}
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while ( $parent = array_shift($parents)) {
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$depth--;
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if ( !$to_depth || ($depth < $to_depth) ) {
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if ( !empty($end_level_callback) ) {
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$cb_args = array_merge( array($output, $depth), $args);
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$output = call_user_func_array($end_level_callback, $cb_args);
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}
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if ( !empty($end_element_callback) ) {
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$cb_args = array_merge( array($output, $parent, $depth), $args);
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$output = call_user_func_array($end_element_callback, $cb_args);
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}
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}
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if ( $page->post_parent == $parent->ID ) {
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break;
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}
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}
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} else if ( !empty($previous_page) ) {
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// Close off previous page.
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if ( !$to_depth || ($depth < $to_depth) ) {
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if ( !empty($end_element_callback) ) {
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$cb_args = array_merge( array($output, $previous_page, $depth), $args);
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$output = call_user_func_array($end_element_callback, $cb_args);
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}
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}
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}
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// Start the page.
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if ( !$to_depth || ($depth < $to_depth) ) {
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if ( !empty($start_element_callback) && ($page->ID != 0) ) {
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$cb_args = array_merge( array($output, $page, $depth), $args);
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$output = call_user_func_array($start_element_callback, $cb_args);
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}
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}
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$previous_page = $page;
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}
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return $output;
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}
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function set_category_path($cat) {
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$cat->fullpath = '/' . $cat->category_nicename;
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$path = $cat->fullpath;
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@ -295,7 +295,6 @@ function &get_page_children($page_id, $pages) {
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function &get_pages($args = '') {
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global $wpdb;
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parse_str($args, $r);
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if ( !isset($r['child_of']) )
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@ -304,6 +303,8 @@ function &get_pages($args = '') {
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$r['sort_column'] = 'post_title';
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if ( !isset($r['sort_order']) )
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$r['sort_order'] = 'ASC';
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if ( !isset($r['hierarchical']) )
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$r['hierarchical'] = 1;
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$exclusions = '';
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if ( !empty($r['exclude']) ) {
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@ -327,12 +328,55 @@ function &get_pages($args = '') {
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// Update cache.
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update_page_cache($pages);
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if ( $r['child_of'] )
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if ( $r['child_of'] || $r['hierarchical'] )
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$pages = & get_page_children($r['child_of'], $pages);
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return $pages;
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}
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function wp_dropdown_pages($args = '') {
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parse_str($args, $r);
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if ( !isset($r['depth']) )
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$r['depth'] = 0;
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if ( !isset($r['child_of']) )
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$r['child_of'] = 0;
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if ( !isset($r['echo']) )
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$r['echo'] = 1;
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if ( !isset($r['selected']) )
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$r['selected'] = 0;
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extract($r);
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$pages = get_pages($args);
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$output = '';
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if ( ! empty($pages) ) {
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$output = "<select name='page_id'>\n";
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$output .= walk_page_tree($pages, $depth, '_page_dropdown_element', '', '', '', $selected);
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$output .= "</select>\n";
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}
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$output = apply_filters('wp_dropdown_pages', $output);
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if ( $echo )
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echo $output;
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return $output;
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}
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function _page_dropdown_element($output, $page, $depth, $selected) {
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$pad = str_repeat(' ', $depth * 3);
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$output .= "\t<option value=\"$page->ID\"";
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if ( $page->ID == $selected )
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$output .= ' selected="selected"';
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$output .= '>';
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$title = wp_specialchars($page->post_title);
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$output .= "$pad$title";
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$output .= "</option>\n";
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return $output;
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}
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function wp_list_pages($args = '') {
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parse_str($args, $r);
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@ -340,6 +384,8 @@ function wp_list_pages($args = '') {
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$r['depth'] = 0;
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if ( !isset($r['show_date']) )
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$r['show_date'] = '';
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if ( !isset($r['date_format']) )
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$r['date_format'] = get_settings('date_format');
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if ( !isset($r['child_of']) )
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$r['child_of'] = 0;
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if ( !isset($r['title_li']) )
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@ -350,42 +396,16 @@ function wp_list_pages($args = '') {
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$output = '';
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// Query pages.
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$pages = & get_pages($args);
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if ( $pages ) {
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$pages = get_pages($args);
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if ( !empty($pages) ) {
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if ( $r['title_li'] )
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$output .= '<li class="pagenav">' . $r['title_li'] . '<ul>';
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// Now loop over all pages that were selected
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$page_tree = Array();
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foreach ( $pages as $page ) {
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// set the title for the current page
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$page_tree[$page->ID]['title'] = $page->post_title;
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$page_tree[$page->ID]['name'] = $page->post_name;
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global $wp_query;
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$current_page = $wp_query->get_queried_object_id();
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$output .= walk_page_tree($pages, $depth, '_page_list_element_start', '_page_list_element_end', '_page_list_level_start', '_page_list_level_end', $current_page, $r['show_date'], $r['date_format']);
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// set the selected date for the current page
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// depending on the query arguments this is either
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// the createtion date or the modification date
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// as a unix timestamp. It will also always be in the
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// ts field.
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if ( !empty($r['show_date']) ) {
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if ( 'modified' == $r['show_date'] )
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$page_tree[$page->ID]['ts'] = $page->post_modified;
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else
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$page_tree[$page->ID]['ts'] = $page->post_date;
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}
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// The tricky bit!!
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// Using the parent ID of the current page as the
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// array index we set the curent page as a child of that page.
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// We can now start looping over the $page_tree array
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// with any ID which will output the page links from that ID downwards.
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if ( $page->post_parent != $page->ID)
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$page_tree[$page->post_parent]['children'][] = $page->ID;
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}
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// Output of the pages starting with child_of as the root ID.
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// child_of defaults to 0 if not supplied in the query.
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$output .= _page_level_out($r['child_of'],$page_tree, $r, 0, false);
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if ( $r['title_li'] )
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$output .= '</ul></li>';
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}
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@ -398,51 +418,44 @@ function wp_list_pages($args = '') {
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return $output;
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}
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function _page_list_level_start($output, $depth) {
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$indent = str_repeat("\t", $depth);
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$output .= "$indent<ul>\n";
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return $output;
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}
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function _page_level_out($parent, $page_tree, $args, $depth = 0, $echo = true) {
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global $wp_query;
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$queried_obj = $wp_query->get_queried_object();
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$output = '';
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function _page_list_level_end($output, $depth) {
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$indent = str_repeat("\t", $depth);
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$output .= "$indent</ul>\n";
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return $output;
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}
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function _page_list_element_start($output, $page, $depth, $current_page, $show_date, $date_format) {
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if ( $depth )
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$indent = str_repeat("\t", $depth);
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//$indent = join('', array_fill(0,$depth,"\t"));
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if ( !is_array($page_tree[$parent]['children']) )
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return false;
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$css_class = 'page_item';
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if ( $page->ID == $current_page )
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$css_class .= ' current_page_item';
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foreach ( $page_tree[$parent]['children'] as $page_id ) {
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$cur_page = $page_tree[$page_id];
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$title = $cur_page['title'];
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$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page->ID) . '" title="' . wp_specialchars($page->post_title) . '">' . $page->post_title . '</a>';
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$css_class = 'page_item';
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if ( $page_id == $queried_obj->ID )
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$css_class .= ' current_page_item';
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if ( !empty($show_date) ) {
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if ( 'modified' == $show_date )
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$time = $page->post_modified;
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else
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$time = $page->post_date;
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$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page_id) . '" title="' . wp_specialchars($title) . '">' . $title . '</a>';
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if ( isset($cur_page['ts']) ) {
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$format = get_settings('date_format');
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if ( isset($args['date_format']) )
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$format = $args['date_format'];
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$output .= " " . mysql2date($format, $cur_page['ts']);
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}
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if ( isset($cur_page['children']) && is_array($cur_page['children']) ) {
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$new_depth = $depth + 1;
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if ( !$args['depth'] || $depth < ($args['depth']-1) ) {
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$output .= "$indent<ul>\n";
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$output .= _page_level_out($page_id, $page_tree, $args, $new_depth, false);
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$output .= "$indent</ul>\n";
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}
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}
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$output .= "$indent</li>\n";
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$output .= " " . mysql2date($date_format, $time);
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}
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if ( $echo )
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echo $output;
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else
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return $output;
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return $output;
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}
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function _page_list_element_end($output, $page, $depth) {
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$output .= "</li>\n";
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return $output;
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}
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function the_attachment_link($id = 0, $fullsize = false, $max_dims = false) {
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