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<?php
/**
* Autoload plugin classes.
*
* @package Meta Box
*/
/**
* Autoload class
*/
class RWMB_Autoloader {
/**
* List of directories to load classes.
*
* @var array
*/
protected $dirs = array();
/**
* Adds a base directory for a class name prefix and/or suffix.
*
* @param string $base_dir A base directory for class files.
* @param string $prefix The class name prefix.
* @param string $suffix The class name suffix.
*/
public function add( $base_dir, $prefix, $suffix = '' ) {
$this->dirs[] = array(
'dir' => trailingslashit( $base_dir ),
'prefix' => $prefix,
'suffix' => $suffix,
);
}
/**
* Register autoloader for plugin classes.
* In PHP 5.3, SPL extension cannot be disabled and it's safe to use autoload.
* However, hosting providers can disable it in PHP 5.2. In that case, we provide a fallback for autoload.
*
* @link http://php.net/manual/en/spl.installation.php
* @link https://github.com/rilwis/meta-box/issues/810
*/
public function register() {
spl_autoload_register( array( $this, 'autoload' ) );
if ( ! class_exists( 'RWMB_Core' ) ) {
$this->fallback();
}
}
/**
* Autoload fields' classes.
*
* @param string $class Class name.
* @return mixed Boolean false if no mapped file can be loaded, or the name of the mapped file that was loaded.
*/
public function autoload( $class ) {
foreach ( $this->dirs as $dir ) {
if (
( $dir['prefix'] && 0 !== strpos( $class, $dir['prefix'] ) )
&& ( $dir['suffix'] && substr( $class, - strlen( $dir['suffix'] ) ) !== $dir['suffix'] )
) {
continue;
}
$file = substr( $class, strlen( $dir['prefix'] ) );
if ( $dir['suffix'] && strlen( $file ) > strlen( $dir['suffix'] ) ) {
$file = substr( $file, 0, - strlen( $dir['suffix'] ) );
}
$file = strtolower( str_replace( '_', '-', $file ) ) . '.php';
$file = $dir['dir'] . $file;
if ( $this->require_file( $file ) ) {
return $file;
}
}
return false;
}
/**
* Fallback for autoload in PHP 5.2.
*/
protected function fallback() {
$files = array(
// Core.
'core',
'clone',
'meta-box',
'meta-box-registry',
'storage-registry',
'interfaces/storage.php',
'storages/base.php',
'storages/post.php',
'validation',
'sanitizer',
'media-modal',
'wpml',
// Walkers.
'walkers/walker',
'walkers/select',
'walkers/select-tree',
'walkers/input-list',
// Fields.
'field',
'field-registry',
'fields/multiple-values',
'fields/autocomplete',
'fields/text-list',
'fields/choice',
'fields/select',
'fields/select-advanced',
'fields/select-tree',
'fields/input-list',
'fields/radio',
'fields/checkbox-list',
'fields/object-choice',
'fields/post',
'fields/taxonomy',
'fields/taxonomy-advanced',
'fields/user',
'fields/input',
'fields/checkbox',
'fields/number',
'fields/range',
'fields/text',
'fields/color',
'fields/datetime',
'fields/date',
'fields/time',
'fields/fieldset-text',
'fields/key-value',
'fields/oembed',
'fields/password',
'fields/file-input',
'fields/file',
'fields/image',
'fields/image-select',
'fields/thickbox-image',
'fields/media',
'fields/file-upload',
'fields/image-advanced',
'fields/image-upload',
'fields/button',
'fields/custom-html',
'fields/divider',
'fields/heading',
'fields/map',
'fields/slider',
'fields/textarea',
'fields/wysiwyg',
);
foreach ( $files as $file ) {
$this->require_file( RWMB_INC_DIR . "$file.php" );
}
}
/**
* If a file exists, require it from the file system.
*
* @param string $file The file to require.
* @return bool True if the file exists, false if not.
*/
protected function require_file( $file ) {
if ( file_exists( $file ) ) {
require_once $file;
return true;
}
return false;
}
}
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