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Introduce a new algorithm for displaying a hierarchical list of post objects in the `WP_Posts_List_Table`. This reduces processing time, reduces database queries, and substantially reduces memory use on sites with a high number of Pages. 

Props nofearinc, rodrigosprimo, nacin, johnbillion.
Fixes #15459

Built from https://develop.svn.wordpress.org/trunk@31730


git-svn-id: http://core.svn.wordpress.org/trunk@31711 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
John Blackbourn 2015-03-11 20:46:27 +00:00
parent b5a06f7695
commit bb99536bf5
3 changed files with 46 additions and 14 deletions
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57
wp-admin/includes/class-wp-posts-list-table.php
View File

@ -86,6 +86,17 @@ class WP_Posts_List_Table extends WP_List_Table {
}
}
/**
* Sets whether the table layout should be hierarchical or not.
*
* @since 4.2.0
*
* @param bool $display Whether the table layout should be hierarchical.
*/
public function set_hierarchical_display( $display ) {
$this->hierarchical_display = $display;
}
public function ajax_user_can() {
return current_user_can( get_post_type_object( $this->screen->post_type )->cap->edit_posts );
}
@ -95,7 +106,7 @@ class WP_Posts_List_Table extends WP_List_Table {
$avail_post_stati = wp_edit_posts_query();
$this->hierarchical_display = ( is_post_type_hierarchical( $this->screen->post_type ) && 'menu_order title' == $wp_query->query['orderby'] );
$this->set_hierarchical_display( is_post_type_hierarchical( $this->screen->post_type ) && 'menu_order title' == $wp_query->query['orderby'] );
$total_items = $this->hierarchical_display ? $wp_query->post_count : $wp_query->found_posts;
@ -478,20 +489,20 @@ class WP_Posts_List_Table extends WP_List_Table {
$count = 0;
$start = ( $pagenum - 1 ) * $per_page;
$end = $start + $per_page;
$to_display = array();
foreach ( $pages as $page ) {
if ( $count >= $end )
break;
if ( $count >= $start ) {
echo "\t";
$this->single_row( $page, $level );
$to_display[$page->ID] = $level;
}
$count++;
if ( isset( $children_pages ) )
$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page );
$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page, $to_display );
}
// If it is the last pagenum and there are orphaned pages, display them with paging as well.
@ -502,14 +513,25 @@ class WP_Posts_List_Table extends WP_List_Table {
break;
if ( $count >= $start ) {
echo "\t";
$this->single_row( $op, 0 );
$to_display[$op->ID] = 0;
}
$count++;
}
}
}
$ids = array_keys( $to_display );
_prime_post_caches( $ids );
if ( ! isset( $GLOBALS['post'] ) ) {
$GLOBALS['post'] = array_shift( $ids );
}
foreach ( $to_display as $page_id => $level ) {
echo "\t";
$this->single_row( $page_id, $level );
}
}
/**
@ -517,6 +539,7 @@ class WP_Posts_List_Table extends WP_List_Table {
* together with paging support
*
* @since 3.1.0 (Standalone function exists since 2.6.0)
* @since 4.2.0 Added the `$to_display` parameter.
*
* @param array $children_pages
* @param int $count
@ -524,8 +547,9 @@ class WP_Posts_List_Table extends WP_List_Table {
* @param int $level
* @param int $pagenum
* @param int $per_page
* @param array $to_display list of pages to be displayed
*/
private function _page_rows( &$children_pages, &$count, $parent, $level, $pagenum, $per_page ) {
private function _page_rows( &$children_pages, &$count, $parent, $level, $pagenum, $per_page, &$to_display ) {
if ( ! isset( $children_pages[$parent] ) )
return;
@ -543,7 +567,13 @@ class WP_Posts_List_Table extends WP_List_Table {
$my_parents = array();
$my_parent = $page->post_parent;
while ( $my_parent ) {
$my_parent = get_post( $my_parent );
// Get the ID from the list or the attribute if my_parent is an object
$parent_id = $my_parent;
if ( is_object( $my_parent ) ) {
$parent_id = $my_parent->ID;
}
$my_parent = get_post( $parent_id );
$my_parents[] = $my_parent;
if ( !$my_parent->post_parent )
break;
@ -551,20 +581,18 @@ class WP_Posts_List_Table extends WP_List_Table {
}
$num_parents = count( $my_parents );
while ( $my_parent = array_pop( $my_parents ) ) {
echo "\t";
$this->single_row( $my_parent, $level - $num_parents );
$to_display[$my_parent->ID] = $level - $num_parents;
$num_parents--;
}
}
if ( $count >= $start ) {
echo "\t";
$this->single_row( $page, $level );
$to_display[$page->ID] = $level;
}
$count++;
$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page );
$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page, $to_display );
}
unset( $children_pages[$parent] ); //required in order to keep track of orphans
@ -579,6 +607,9 @@ class WP_Posts_List_Table extends WP_List_Table {
global $mode;
$global_post = get_post();
$post = get_post( $post );
$GLOBALS['post'] = $post;
setup_postdata( $post );

1
wp-admin/includes/post.php
View File

@ -1039,6 +1039,7 @@ function wp_edit_posts_query( $q = false ) {
$query['order'] = 'asc';
$query['posts_per_page'] = -1;
$query['posts_per_archive_page'] = -1;
$query['fields'] = 'id=>parent';
}
if ( ! empty( $q['show_sticky'] ) )

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.2-alpha-31729';
$wp_version = '4.2-alpha-31730';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.