237 lines
6.3 KiB
PHP
237 lines
6.3 KiB
PHP
<?php
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/**
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* BackPress Scripts enqueue.
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*
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* These classes were refactored from the WordPress WP_Scripts and WordPress
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* script enqueue API.
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*
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* @package BackPress
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* @since r74
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*/
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/**
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* BackPress enqueued dependiences class.
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*
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* @package BackPress
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* @uses _WP_Dependency
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* @since r74
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*/
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class WP_Dependencies {
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var $registered = array();
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var $queue = array();
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var $to_do = array();
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var $done = array();
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var $args = array();
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var $groups = array();
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var $group = 0;
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/**
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* Do the dependencies
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*
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* Process the items passed to it or the queue. Processes all dependencies.
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*
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* @param mixed $handles (optional) items to be processed. (void) processes queue, (string) process that item, (array of strings) process those items
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* @return array Items that have been processed
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*/
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function do_items( $handles = false, $group = false ) {
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// Print the queue if nothing is passed. If a string is passed, print that script. If an array is passed, print those scripts.
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$handles = false === $handles ? $this->queue : (array) $handles;
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$this->all_deps( $handles );
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foreach( $this->to_do as $key => $handle ) {
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if ( !in_array($handle, $this->done, true) && isset($this->registered[$handle]) ) {
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if ( ! $this->registered[$handle]->src ) { // Defines a group.
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$this->done[] = $handle;
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continue;
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}
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if ( $this->do_item( $handle, $group ) )
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$this->done[] = $handle;
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unset( $this->to_do[$key] );
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}
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}
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return $this->done;
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}
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function do_item( $handle ) {
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return isset($this->registered[$handle]);
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}
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/**
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* Determines dependencies
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*
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* Recursively builds array of items to process taking dependencies into account. Does NOT catch infinite loops.
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*
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*
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* @param mixed $handles Accepts (string) dep name or (array of strings) dep names
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* @param bool $recursion Used internally when function calls itself
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*/
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function all_deps( $handles, $recursion = false, $group = false ) {
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if ( !$handles = (array) $handles )
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return false;
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foreach ( $handles as $handle ) {
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$handle_parts = explode('?', $handle);
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$handle = $handle_parts[0];
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$queued = in_array($handle, $this->to_do, true);
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if ( in_array($handle, $this->done, true) ) // Already done
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continue;
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$moved = $this->set_group( $handle, $recursion, $group );
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if ( $queued && !$moved ) // already queued and in the right group
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continue;
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$keep_going = true;
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if ( !isset($this->registered[$handle]) )
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$keep_going = false; // Script doesn't exist
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elseif ( $this->registered[$handle]->deps && array_diff($this->registered[$handle]->deps, array_keys($this->registered)) )
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$keep_going = false; // Script requires deps which don't exist (not a necessary check. efficiency?)
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elseif ( $this->registered[$handle]->deps && !$this->all_deps( $this->registered[$handle]->deps, true, $group ) )
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$keep_going = false; // Script requires deps which don't exist
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if ( !$keep_going ) { // Either script or its deps don't exist.
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if ( $recursion )
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return false; // Abort this branch.
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else
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continue; // We're at the top level. Move on to the next one.
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}
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if ( $queued ) // Already grobbed it and its deps
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continue;
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if ( isset($handle_parts[1]) )
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$this->args[$handle] = $handle_parts[1];
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$this->to_do[] = $handle;
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}
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return true;
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}
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/**
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* Adds item
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*
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* Adds the item only if no item of that name already exists
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*
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* @param string $handle Script name
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* @param string $src Script url
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* @param array $deps (optional) Array of script names on which this script depends
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* @param string $ver (optional) Script version (used for cache busting)
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* @return array Hierarchical array of dependencies
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*/
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function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
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if ( isset($this->registered[$handle]) )
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return false;
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$this->registered[$handle] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
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return true;
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}
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/**
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* Adds extra data
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*
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* Adds data only if script has already been added
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*
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* @param string $handle Script name
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* @param string $data_name Name of object in which to store extra data
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* @param array $data Array of extra data
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* @return bool success
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*/
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function add_data( $handle, $data_name, $data ) {
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if ( !isset($this->registered[$handle]) )
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return false;
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return $this->registered[$handle]->add_data( $data_name, $data );
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}
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function remove( $handles ) {
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foreach ( (array) $handles as $handle )
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unset($this->registered[$handle]);
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}
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function enqueue( $handles ) {
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foreach ( (array) $handles as $handle ) {
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$handle = explode('?', $handle);
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if ( !in_array($handle[0], $this->queue) && isset($this->registered[$handle[0]]) ) {
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$this->queue[] = $handle[0];
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if ( isset($handle[1]) )
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$this->args[$handle[0]] = $handle[1];
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}
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}
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}
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function dequeue( $handles ) {
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foreach ( (array) $handles as $handle ) {
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$handle = explode('?', $handle);
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$key = array_search($handle[0], $this->queue);
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if ( false !== $key ) {
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unset($this->queue[$key]);
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unset($this->args[$handle[0]]);
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}
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}
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}
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function query( $handle, $list = 'registered' ) { // registered, queue, done, to_do
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switch ( $list ) :
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case 'registered':
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case 'scripts': // back compat
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if ( isset($this->registered[$handle]) )
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return $this->registered[$handle];
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break;
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case 'to_print': // back compat
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case 'printed': // back compat
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if ( 'to_print' == $list )
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$list = 'to_do';
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else
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$list = 'printed';
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default:
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if ( in_array($handle, $this->$list) )
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return true;
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break;
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endswitch;
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return false;
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}
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function set_group( $handle, $recursion, $group ) {
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$group = (int) $group;
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if ( $recursion )
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$group = min($this->group, $group);
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else
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$this->group = $group;
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if ( isset($this->groups[$handle]) && $this->groups[$handle] <= $group )
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return false;
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$this->groups[$handle] = $group;
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return true;
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}
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}
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class _WP_Dependency {
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var $handle;
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var $src;
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var $deps = array();
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var $ver = false;
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var $args = null;
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var $extra = array();
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function __construct() {
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@list($this->handle, $this->src, $this->deps, $this->ver, $this->args) = func_get_args();
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if ( !is_array($this->deps) )
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$this->deps = array();
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}
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function add_data( $name, $data ) {
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if ( !is_scalar($name) )
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return false;
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$this->extra[$name] = $data;
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return true;
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}
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}
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