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Move page walkers to classes. Props David House. fixes #2593 

git-svn-id: http://svn.automattic.com/wordpress/trunk@3704 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2006-04-13 04:40:48 +00:00
parent 22922b00bc
commit a8eac8ee6d
4 changed files with 307 additions and 283 deletions
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279
wp-includes/classes.php
View File

@ -400,4 +400,283 @@ function is_wp_error($thing) {
return false;
}
// A class for displaying various tree-like structures. Extend the Walker class to use it, see examples at the bottom
class Walker {
var $tree_type;
var $db_fields;
//abstract callbacks
function start_lvl($output) { return $output; }
function end_lvl($output) { return $output; }
function start_el($output) { return $output; }
function end_el($output) { return $output; }
function walk($elements, $to_depth) {
$args = array_slice(func_get_args(), 2); $parents = array(); $depth = 1; $previous_element = ''; $output = '';
//padding at the end
$last_element->post_parent = 0;
$last_element->post_id = 0;
$elements[] = $last_element;
$id_field = $this->db_fields['id'];
$parent_field = $this->db_fields['parent'];
$flat = ($to_depth == -1) ? true : false;
foreach ( $elements as $element ) {
// If flat, start and end the element and skip the level checks.
if ( $flat) {
// Start the element.
if ( $element->$id_field != 0 ) {
$cb_args = array_merge( array($output, $element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'start_el'), $cb_args);
}
// End the element.
if ( $element->$id_field != 0 ) {
$cb_args = array_merge( array($output, $element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
}
continue;
}
// Walk the tree.
if ( !empty($previous_element) && ($element->$parent_field == $previous_element->$id_field) ) {
// Previous element is my parent. Descend a level.
array_unshift($parents, $previous_element);
$depth++; //always do this so when we start the element further down, we know where we are
if ( !$to_depth || ($depth < $to_depth) ) { //only descend if we're below $to_depth
$cb_args = array_merge( array($output, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
}
} else if ( $element->$parent_field == $previous_element->$parent_field) {
// On the same level as previous element.
if ( !$to_depth || ($depth <= $to_depth) ) {
$cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
}
} else if ( $depth > 1 ) {
// Ascend one or more levels.
if ( !$to_depth || ($depth <= $to_depth) ) {
$cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
}
while ( $parent = array_shift($parents) ) {
$depth--;
if ( !$to_depth || ($depth < $to_depth) ) {
$cb_args = array_merge( array($output, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
$cb_args = array_merge( array($output, $parent, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
}
if ( $element->$parent_field == $parents[0]->$id_field ) {
break;
}
}
} else if ( !empty($previous_element) ) {
// Close off previous element.
if ( !$to_depth || ($depth <= $to_depth) ) {
$cb_args = array_merge( array($output, $previous_element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'end_el'), $cb_args);
}
}
// Start the element.
if ( !$to_depth || ($depth <= $to_depth) ) {
if ( $element->$id_field != 0 ) {
$cb_args = array_merge( array($output, $element, $depth - 1), $args);
$output = call_user_func_array(array(&$this, 'start_el'), $cb_args);
}
}
$previous_element = $element;
}
return $output;
}
}
class Walker_Page extends Walker {
var $tree_type = 'page';
var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID'); //TODO: decouple this
function start_lvl($output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "$indent<ul>\n";
return $output;
}
function end_lvl($output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "$indent</ul>\n";
return $output;
}
function start_el($output, $page, $depth, $current_page, $show_date, $date_format) {
if ( $depth )
$indent = str_repeat("\t", $depth);
$css_class = 'page_item';
if ( $page->ID == $current_page )
$css_class .= ' current_page_item';
$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page->ID) . '" title="' . wp_specialchars($page->post_title) . '">' . $page->post_title . '</a>';
if ( !empty($show_date) ) {
if ( 'modified' == $show_date )
$time = $page->post_modified;
else
$time = $page->post_date;
$output .= " " . mysql2date($date_format, $time);
}
return $output;
}
function end_el($output, $page, $depth) {
$output .= "</li>\n";
return $output;
}
}
class Walker_PageDropdown extends Walker {
var $tree_type = 'page';
var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID'); //TODO: decouple this
function start_el($output, $page, $depth, $args) {
$pad = str_repeat('&nbsp;', $depth * 3);
$output .= "\t<option value=\"$page->ID\"";
if ( $page->ID == $args['selected'] )
$output .= ' selected="selected"';
$output .= '>';
$title = wp_specialchars($page->post_title);
$output .= "$pad$title";
$output .= "</option>\n";
return $output;
}
}
class Walker_Category extends Walker {
var $tree_type = 'category';
var $db_fields = array ('parent' => 'category_parent', 'id' => 'cat_ID'); //TODO: decouple this
function start_lvl($output, $depth, $args) {
if ( 'list' != $args['style'] )
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent<ul class='children'>\n";
return $output;
}
function end_lvl($output, $depth, $args) {
if ( 'list' != $args['style'] )
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent</ul>\n";
return $output;
}
function start_el($output, $category, $depth, $args) {
extract($args);
$link = '<a href="' . get_category_link($category->cat_ID) . '" ';
if ( $use_desc_for_title == 0 || empty($category->category_description) )
$link .= 'title="'. sprintf(__("View all posts filed under %s"), wp_specialchars($category->cat_name)) . '"';
else
$link .= 'title="' . wp_specialchars(apply_filters('category_description',$category->category_description,$category)) . '"';
$link .= '>';
$link .= apply_filters('list_cats', $category->cat_name, $category).'</a>';
if ( (! empty($feed_image)) || (! empty($feed)) ) {
$link .= ' ';
if ( empty($feed_image) )
$link .= '(';
$link .= '<a href="' . get_category_rss_link(0, $category->cat_ID, $category->category_nicename) . '"';
if ( !empty($feed) ) {
$title = ' title="' . $feed . '"';
$alt = ' alt="' . $feed . '"';
$name = $feed;
$link .= $title;
}
$link .= '>';
if ( !empty($feed_image) )
$link .= "<img src='$feed_image' $alt$title" . ' />';
else
$link .= $name;
$link .= '</a>';
if (empty($feed_image))
$link .= ')';
}
if ( $show_count )
$link .= ' ('.intval($category->category_count).')';
if ( $show_date ) {
$link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
}
if ( 'list' == $args['style'] ) {
$output .= "\t<li";
if ( ($category->cat_ID == $current_category) && is_category() )
$output .= ' class="current-cat"';
$output .= ">$link\n";
} else {
$output .= "\t$link<br />\n";
}
return $output;
}
function end_el($output, $page, $depth) {
if ( 'list' != $args['style'] )
return $output;
$output .= "</li>\n";
return $output;
}
}
class Walker_CategoryDropdown extends Walker {
var $tree_type = 'category';
var $db_fields = array ('parent' => 'category_parent', 'id' => 'cat_ID'); //TODO: decouple this
function start_el($output, $category, $depth, $args) {
$pad = str_repeat('&nbsp;', $depth * 3);
$cat_name = apply_filters('list_cats', $category->cat_name, $category);
$output .= "\t<option value=\"".$category->cat_ID."\"";
if ( $category->cat_ID == $args['selected'] )
$output .= ' selected="selected"';
$output .= '>';
$output .= $cat_name;
if ( $args['show_count'] )
$output .= '&nbsp;&nbsp;('. $category->category_count .')';
if ( $args['show_last_update'] ) {
$format = 'Y-m-d';
$output .= '&nbsp;&nbsp;' . gmdate($format, $category->last_update_timestamp);
}
$output .= "</option>\n";
return $output;
}
}
?>

122
wp-includes/functions.php
View File

@ -714,128 +714,6 @@ function &get_page(&$page, $output = OBJECT) {
}
}
function walk_tree($tree_type, $elements, $to_depth, $start_element_callback, $end_element_callback = '', $start_level_callback = '', $end_level_callback = '') {
$args = array_slice(func_get_args(), 7);
$parents = array();
$depth = 1;
$previous_element = '';
$output = '';
$last_element->post_parent = 0;
$last_element->post_id = 0;
$elements[] = $last_element;
if ( 'page' == $tree_type ) {
$parent_field = 'post_parent';
$id_field = 'ID';
} else {
$parent_field = 'category_parent';
$id_field = 'cat_ID';
}
$flat = false;
if ( $to_depth == -1 )
$flat = true;
foreach ( $elements as $element ) {
// If flat, start and end the element and skip the level checks.
if ( $flat) {
// Start the element.
if ( !empty($start_element_callback) && ($element->$id_field != 0) ) {
$cb_args = array_merge( array($output, $element, $depth), $args);
$output = call_user_func_array($start_element_callback, $cb_args);
}
// End the element.
if ( !empty($end_element_callback) && ($element->$id_field != 0) ) {
$cb_args = array_merge( array($output, $element, $depth), $args);
$output = call_user_func_array($end_element_callback, $cb_args);
}
continue;
}
// Walk the tree.
if ( !empty($previous_element) && ($element->$parent_field == $previous_element->$id_field) ) {
// Previous element is my parent. Descend a level.
$depth++; //always do this so when we start the element further down, we know where we are
array_unshift($parents, $previous_element);
if ( !$to_depth || ($depth < $to_depth) ) { //only descend if we're below $to_depth
if ( !empty($start_level_callback) ) {
$cb_args = array_merge( array($output, $depth), $args);
$output = call_user_func_array($start_level_callback, $cb_args);
}
}
} else if ( $element->$parent_field == $previous_element->$parent_field ) {
// On the same level as previous element, so close the previous
if ( !$to_depth || ($depth <= $to_depth) ) {
if ( !empty($end_element_callback) ) {
$cb_args = array_merge( array($output, $previous_element, $depth), $args);
$output = call_user_func_array($end_element_callback, $cb_args);
}
}
} else if ( $depth > 1 ) {
// Ascend one or more levels.
if ( !$to_depth || ($depth <= $to_depth) ) {
if ( !empty($end_element_callback) ) {
$cb_args = array_merge( array($output, $previous_element, $depth), $args);
$output = call_user_func_array($end_element_callback, $cb_args);
}
}
while ( $parent = array_shift($parents) ) {
$depth--;
if ( !$to_depth || ($depth < $to_depth) ) {
if ( !empty($end_level_callback) ) {
$cb_args = array_merge( array($output, $depth), $args);
$output = call_user_func_array($end_level_callback, $cb_args);
}
if ( !empty($end_element_callback) ) {
$cb_args = array_merge( array($output, $parent, $depth), $args);
$output = call_user_func_array($end_element_callback, $cb_args);
}
}
if ( $element->$parent_field == $parents[0]->$id_field ) {
break;
}
}
} else if ( !empty($previous_element) ) {
// Close off previous element.
if ( !$to_depth || ($depth <= $to_depth) ) {
if ( !empty($end_element_callback) ) {
$cb_args = array_merge( array($output, $previous_element, $depth), $args);
$output = call_user_func_array($end_element_callback, $cb_args);
}
}
}
// Start the element.
if ( !$to_depth || ($depth <= $to_depth) ) {
if ( !empty($start_element_callback) && ($element->$id_field != 0) ) {
$cb_args = array_merge( array($output, $element, $depth), $args);
$output = call_user_func_array($start_element_callback, $cb_args);
}
}
$previous_element = $element;
}
return $output;
}
function walk_page_tree($pages, $to_depth, $start_element_callback, $end_element_callback = '', $start_level_callback = '', $end_level_callback = '') {
$args = array('page', $pages, $to_depth, $start_element_callback, $end_element_callback, $start_level_callback, $end_level_callback);
$extra_args = array_slice(func_get_args(), 6);
return call_user_func_array('walk_tree', array_merge($args, $extra_args));
}
function walk_category_tree($pages, $to_depth, $start_element_callback, $end_element_callback = '', $start_level_callback = '', $end_level_callback = '') {
$args = array('category', $pages, $to_depth, $start_element_callback, $end_element_callback, $start_level_callback, $end_level_callback);
$extra_args = array_slice(func_get_args(), 6);
return call_user_func_array('walk_tree', array_merge($args, $extra_args));
}
function get_category_by_path($category_path, $full_match = true, $output = OBJECT) {
global $wpdb;
$category_path = rawurlencode(urldecode($category_path));

120
wp-includes/template-functions-category.php
View File

@ -1,5 +1,17 @@
<?php
function walk_category_tree() {
$walker = new Walker_Category;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function walk_category_dropdown_tree() {
$walker = new Walker_CategoryDropdown;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function get_the_category($id = false) {
global $post, $category_cache;
@ -185,7 +197,7 @@ function wp_dropdown_categories($args = '') {
else
$depth = -1; // Flat.
$output .= walk_category_tree($categories, $depth, '_category_dropdown_element', '', '', '', $selected, $r);
$output .= walk_category_dropdown_tree($categories, $depth, $r);
$output .= "</select>\n";
}
@ -197,26 +209,6 @@ function wp_dropdown_categories($args = '') {
return $output;
}
function _category_dropdown_element($output, $category, $depth, $selected, $args) {
$pad = str_repeat('&nbsp;', $depth * 3);
$cat_name = apply_filters('list_cats', $category->cat_name, $category);
$output .= "\t<option value=\"".$category->cat_ID."\"";
if ( $category->cat_ID == $selected )
$output .= ' selected="selected"';
$output .= '>';
$output .= $cat_name;
if ( $args['show_count'] )
$output .= '&nbsp;&nbsp;('. $category->category_count .')';
if ( $args['show_last_update'] ) {
$format = 'Y-m-d';
$output .= '&nbsp;&nbsp;' . gmdate($format, $category->last_update_timestamp);
}
$output .= "</option>\n";
return $output;
}
function wp_list_categories($args = '') {
if ( is_array($args) )
$r = &$args;
@ -245,13 +237,13 @@ function wp_list_categories($args = '') {
$output .= __("No categories");
} else {
global $wp_query;
$current_category = $wp_query->get_queried_object_id();
$r['current_category'] = $wp_query->get_queried_object_id();
if ( $hierarchical )
$depth = 0; // Walk the full depth.
else
$depth = -1; // Flat.
$output .= walk_category_tree($categories, $depth, '_category_list_element_start', '_category_list_element_end', '_category_list_level_start', '_category_list_level_end', $current_category, $r);
$output .= walk_category_tree($categories, $depth, $r);
}
if ( $title_li && $list )
@ -260,88 +252,6 @@ function wp_list_categories($args = '') {
echo apply_filters('list_cats', $output);
}
function _category_list_level_start($output, $depth, $cat, $args) {
if ( 'list' != $args['style'] )
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent<ul class='children'>\n";
return $output;
}
function _category_list_level_end($output, $depth, $cat, $args) {
if ( 'list' != $args['style'] )
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent</ul>\n";
return $output;
}
function _category_list_element_start($output, $category, $depth, $current_category, $args) {
extract($args);
$link = '<a href="' . get_category_link($category->cat_ID) . '" ';
if ( $use_desc_for_title == 0 || empty($category->category_description) )
$link .= 'title="'. sprintf(__("View all posts filed under %s"), wp_specialchars($category->cat_name)) . '"';
else
$link .= 'title="' . wp_specialchars(apply_filters('category_description',$category->category_description,$category)) . '"';
$link .= '>';
$link .= apply_filters('list_cats', $category->cat_name, $category).'</a>';
if ( (! empty($feed_image)) || (! empty($feed)) ) {
$link .= ' ';
if ( empty($feed_image) )
$link .= '(';
$link .= '<a href="' . get_category_rss_link(0, $category->cat_ID, $category->category_nicename) . '"';
if ( !empty($feed) ) {
$title = ' title="' . $feed . '"';
$alt = ' alt="' . $feed . '"';
$name = $feed;
$link .= $title;
}
$link .= '>';
if ( !empty($feed_image) )
$link .= "<img src='$feed_image' $alt$title" . ' />';
else
$link .= $name;
$link .= '</a>';
if (empty($feed_image))
$link .= ')';
}
if ( $show_count )
$link .= ' ('.intval($category->category_count).')';
if ( $show_date ) {
$link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
}
if ( 'list' == $args['style'] ) {
$output .= "\t<li";
if ( ($category->cat_ID == $current_category) && is_category() )
$output .= ' class="current-cat"';
$output .= ">$link\n";
} else {
$output .= "\t$link<br />\n";
}
return $output;
}
function _category_list_element_end($output, $category, $depth, $cat, $args) {
if ( 'list' != $args['style'] )
return $output;
$output .= "</li>\n";
return $output;
}
function in_category($category) { // Check if the current post is in the given category
global $category_cache, $post;

69
wp-includes/template-functions-post.php
View File

@ -278,6 +278,17 @@ function the_meta() {
Pages
*/
function walk_page_tree() {
$walker = new Walker_Page;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function walk_page_dropdown_tree() {
$walker = new Walker_PageDropdown;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function &get_page_children($page_id, $pages) {
global $page_cache;
@ -381,7 +392,7 @@ function wp_dropdown_pages($args = '') {
if ( ! empty($pages) ) {
$output = "<select name='$name'>\n";
$output .= walk_page_tree($pages, $depth, '_page_dropdown_element', '', '', '', $selected);
$output .= walk_page_dropdown_tree($pages, $depth, $r);
$output .= "</select>\n";
}
@ -393,20 +404,6 @@ function wp_dropdown_pages($args = '') {
return $output;
}
function _page_dropdown_element($output, $page, $depth, $selected) {
$pad = str_repeat('&nbsp;', $depth * 3);
$output .= "\t<option value=\"$page->ID\"";
if ( $page->ID == $selected )
$output .= ' selected="selected"';
$output .= '>';
$title = wp_specialchars($page->post_title);
$output .= "$pad$title";
$output .= "</option>\n";
return $output;
}
function wp_list_pages($args = '') {
if ( is_array($args) )
$r = &$args;
@ -428,7 +425,7 @@ function wp_list_pages($args = '') {
global $wp_query;
$current_page = $wp_query->get_queried_object_id();
$output .= walk_page_tree($pages, $r['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']);
$output .= walk_page_tree($pages, $depth, $current_page, $r['show_date'], $r['date_format']);
if ( $r['title_li'] )
$output .= '</ul></li>';
@ -442,46 +439,6 @@ function wp_list_pages($args = '') {
return $output;
}
function _page_list_level_start($output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "$indent<ul>\n";
return $output;
}
function _page_list_level_end($output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "$indent</ul>\n";
return $output;
}
function _page_list_element_start($output, $page, $depth, $current_page, $show_date, $date_format) {
if ( $depth )
$indent = str_repeat("\t", $depth);
$css_class = 'page_item';
if ( $page->ID == $current_page )
$css_class .= ' current_page_item';
$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page->ID) . '" title="' . wp_specialchars($page->post_title) . '">' . $page->post_title . '</a>';
if ( !empty($show_date) ) {
if ( 'modified' == $show_date )
$time = $page->post_modified;
else
$time = $page->post_date;
$output .= " " . mysql2date($date_format, $time);
}
return $output;
}
function _page_list_element_end($output, $page, $depth) {
$output .= "</li>\n";
return $output;
}
function the_attachment_link($id = 0, $fullsize = false, $max_dims = false) {
echo get_the_attachment_link($id, $fullsize, $max_dims);
}