<?php

/**

 * Implements hook_theme().

 */

function theme_test_theme($existing, $type, $theme, $path) {

  $items['theme_test'] = array(

    'file' => 'theme_test.inc',

    'variables' => array('foo' => ''),

  );

  $items['theme_test_template_test'] = array(

    'template' => 'theme_test.template_test',

  );

  $items['theme_test_template_test_2'] = array(

    'template' => 'theme_test.template_test',

  );

  $items['theme_test_foo'] = array(

    'variables' => array('foo' => NULL),

  );

  return $items;

}

/**

 * Implements hook_system_theme_info().

 */

function theme_test_system_theme_info() {

  $themes['test_theme'] = drupal_get_path('module', 'theme_test') . '/themes/test_theme/test_theme.info';

  $themes['test_basetheme'] = drupal_get_path('module', 'theme_test') . '/themes/test_basetheme/test_basetheme.info';

  $themes['test_subtheme'] = drupal_get_path('module', 'theme_test') . '/themes/test_subtheme/test_subtheme.info';

  $themes['test_theme_nyan_cat'] = drupal_get_path('module', 'theme_test') . '/themes/test_theme_nyan_cat/test_theme_nyan_cat.info';

  return $themes;

}

/**

 * Implements hook_system_theme_engine_info().

 */

function theme_test_system_theme_engine_info() {

  $theme_engines['nyan_cat'] = drupal_get_path('module', 'theme_test') . '/themes/engines/nyan_cat/nyan_cat.engine';

  return $theme_engines;

}

/**

 * Implements hook_menu().

 */

function theme_test_menu() {

  $items['theme-test/suggestion'] = array(

    'title' => 'Suggestion',

    'page callback' => '_theme_test_suggestion',

    'access arguments' => array('access content'),

    'theme callback' => '_theme_custom_theme',

    'type' => MENU_CALLBACK,

  );

  $items['theme-test/alter'] = array(

    'title' => 'Suggestion',

    'page callback' => '_theme_test_alter',

    'access arguments' => array('access content'),

    'theme callback' => '_theme_custom_theme',

    'type' => MENU_CALLBACK,

  );

  $items['theme-test/hook-init'] = array(

    'page callback' => 'theme_test_hook_init_page_callback',

    'access callback' => TRUE,

    'type' => MENU_CALLBACK,

  );

  $items['theme-test/drupal-add-region-content'] = array(

    'page callback' => '_theme_test_drupal_add_region_content',

    'access callback' => TRUE,

    'type' => MENU_CALLBACK,

  );

  $items['theme-test/engine-info-test'] = array(

    'description' => "Serves a simple page rendered using a Nyan Cat theme engine template.",

    'page callback' => '_theme_test_engine_info_test',

    'access callback' => TRUE,

    'type' => MENU_CALLBACK,

  );

  return $items;

}

/**

 * Implements hook_init().

 */

function theme_test_init() {

  if (arg(0) == 'theme-test' && arg(1) == 'hook-init') {

    // First, force the theme registry to be rebuilt on this page request. This

    // allows us to test a full initialization of the theme system in the code

    // below.

    drupal_theme_rebuild();

    // Next, initialize the theme system by storing themed text in a global

    // variable. We will use this later in theme_test_hook_init_page_callback()

    // to test that even when the theme system is initialized this early, it is

    // still capable of returning output and theming the page as a whole.

    $GLOBALS['theme_test_output'] = theme('more_link', array('url' => 'user', 'title' => 'Themed output generated in hook_init()'));

  }

}

/**

 * Implements hook_exit().

 */

function theme_test_exit() {

  if (arg(0) == 'user') {

    // Register a fake registry loading callback. If it gets called by

    // theme_get_registry(), the registry has not been initialized yet.

    _theme_registry_callback('_theme_test_load_registry', array());

    print theme_get_registry() ? 'registry initialized' : 'registry not initialized';

  }

}

/**

 * Fake registry loading callback.

 */

function _theme_test_load_registry() {

  return array();

}

/**

 * Menu callback for testing themed output generated in hook_init().

 */

function theme_test_hook_init_page_callback() {

  return $GLOBALS['theme_test_output'];

}

/**

 * Custom theme callback.

 */

function _theme_custom_theme() {

  return 'test_theme';

}

/**

 * Page callback, calls drupal_alter().

 *

 * This is for testing that the theme can have hook_*_alter() implementations

 * that run during page callback execution, even before theme() is called for

 * the first time.

 */

function _theme_test_alter() {

  $data = 'foo';

  drupal_alter('theme_test_alter', $data);

  return "The altered data is $data.";

}

/**

 * Page callback, calls a theme hook suggestion.

 */

function _theme_test_suggestion() {

  return theme(array('theme_test__suggestion', 'theme_test'), array());

}

/**

 * Page callback, calls drupal_add_region_content.

 */

function _theme_test_drupal_add_region_content() {

  drupal_add_region_content('content', 'World');

  return 'Hello';

}

/**

 * Serves a simple page renderered using a Nyan Cat theme engine template.

 */

function _theme_test_engine_info_test() {

  return array(

    '#markup' => theme('theme_test_template_test'),

  );

}

/**

 * Theme function for testing theme('theme_test_foo').

 */

function theme_theme_test_foo($variables) {

  return $variables['foo'];

}