<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View\Design;

/**
* Interface ThemeInterface
*
* @api
* @since 100.0.2
*/
interface ThemeInterface
{
/**
* Separator between theme_path elements
*/
const PATH_SEPARATOR = '/';

/**
* Separator between parts of full theme code (package and theme code)
*/
const CODE_SEPARATOR = '/';

/**
* Physical theme type
*/
const TYPE_PHYSICAL = 0;

/**
* Virtual theme type
*/
const TYPE_VIRTUAL = 1;

/**
* Staging theme type
*/
const TYPE_STAGING = 2;

/**
* Retrieve code of an area a theme belongs to
*
* @return string
*/
public function getArea();

/**
* Retrieve theme path unique within an area
*
* @return string
*/
public function getThemePath();

/**
* Retrieve theme path unique across areas
*
* @return string
*/
public function getFullPath();

/**
* Retrieve parent theme instance
*
* @return ThemeInterface|null
*/
public function getParentTheme();

/**
* Get code of the theme
*
* @return string
*/
public function getCode();

/**
* Check if theme is physical
*
* @return bool
*/
public function isPhysical();

/**
* Return the full theme inheritance sequence, from the root theme till a specified one
* Format: array([<root_theme>, ..., <parent_theme>,] <current_theme>)
*
* @return ThemeInterface[]
*/
public function getInheritedThemes();

/**
* Get theme id
*
* @return int
*/
public function getId();
}