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functions/kirki/class-kirki-autoload.php

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+<?php
+/**
+ * The Kirki autoloader.
+ * Handles locating and loading other class-files.
+ *
+ * @package     Kirki
+ * @category    Core
+ * @author      Aristeides Stathopoulos
+ * @copyright   Copyright (c) 2017, Aristeides Stathopoulos
+ * @license    https://opensource.org/licenses/MIT
+ * @since       1.0
+ */
+
+/**
+ * Autoloader class.
+ *
+ * @since 3.0.10
+ */
+class Kirki_Autoload {
+
+	/**
+	 * Cached paths.
+	 *
+	 * @access private
+	 * @since 3.0.10
+	 * @var array
+	 */
+	private $cached_paths = array();
+
+	/**
+	 * Class constructor.
+	 *
+	 * @access public
+	 * @since 3.0.10
+	 */
+	public function __construct() {
+
+		spl_autoload_register( array( $this, 'autoload' ) );
+	}
+
+	/**
+	 * The Kirki class autoloader.
+	 * Finds the path to a class that we're requiring and includes the file.
+	 *
+	 * @access protected
+	 * @since 3.0.10
+	 * @param string $class_name The name of the class we're trying to load.
+	 */
+	protected function autoload( $class_name ) {
+
+		// Not a Kirki file, early exit.
+		if ( 0 !== stripos( $class_name, 'Kirki' ) ) {
+			return;
+		}
+
+		// Check if we've got it cached and ready.
+		if ( isset( $this->cached_paths[ $class_name ] ) && file_exists( $this->cached_paths[ $class_name ] ) ) {
+			include_once $this->cached_paths[ $class_name ];
+			return;
+		}
+
+		$paths = $this->get_paths( $class_name );
+
+		foreach ( $paths as $path ) {
+			$path = wp_normalize_path( $path );
+			if ( file_exists( $path ) ) {
+				$this->cached_paths[ $class_name ] = $path;
+				include_once $path;
+				return;
+			}
+		}
+	}
+
+	/**
+	 * Get an array of possible paths for the file.
+	 *
+	 * @access protected
+	 * @since 3.0.10
+	 * @param string $class_name The name of the class we're trying to load.
+	 * @return array
+	 */
+	protected function get_paths( $class_name ) {
+
+		$paths = array();
+		// Build the filename.
+		$filename = 'class-' . strtolower( str_replace( '_', '-', $class_name ) ) . '.php';
+
+		// Break class-name is parts.
+		$name_parts = explode( '_', str_replace( 'Kirki_', '', $class_name ) );
+
+		// Handle modules loading.
+		if ( isset( $name_parts[0] ) && 'Modules' === $name_parts[0] ) {
+			$path    = dirname( __FILE__ ) . '/modules/';
+			$path   .= strtolower( str_replace( '_', '-', str_replace( 'Kirki_Modules_', '', $class_name ) ) ) . '/';
+			$paths[] = $path . $filename;
+		} elseif ( 'Kirki_Fonts' === $class_name ) {
+			$paths[] = dirname( __FILE__ ) . '/modules/webfonts/class-kirki-fonts.php';
+		}
+
+		if ( isset( $name_parts[0] ) ) {
+
+			// Handle controls loading.
+			if ( 'Control' === $name_parts[0] || 'Settings' === $name_parts[0] ) {
+				$path    = dirname( __FILE__ ) . '/controls/php/';
+				$paths[] = $path . $filename;
+			}
+		}
+
+		$paths[] = dirname( __FILE__ ) . '/core/' . $filename;
+		$paths[] = dirname( __FILE__ ) . '/lib/' . $filename;
+
+		$substr   = str_replace( 'Kirki_', '', $class_name );
+		$exploded = explode( '_', $substr );
+		$levels   = count( $exploded );
+
+		$previous_path = '';
+		for ( $i = 0; $i < $levels; $i++ ) {
+			$paths[]        = dirname( __FILE__ ) . '/' . $previous_path . strtolower( $exploded[ $i ] ) . '/' . $filename;
+			$previous_path .= strtolower( $exploded[ $i ] ) . '/';
+		}
+		return $paths;
+	}
+}