function _system_rebuild_theme_data

Helper function to scan and collect theme .info data and their engines.

Return value

An associative array of themes information.

File

modules/system/system.module, line 2527

Code

function _system_rebuild_theme_data() {
    // Find themes
    $themes = drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\\.info$/', 'themes');
    // Allow modules to add further themes.
    if ($module_themes = module_invoke_all('system_theme_info')) {
        foreach ($module_themes as $name => $uri) {
            // @see file_scan_directory()
            $themes[$name] = (object) array(
                'uri' => $uri,
                'filename' => pathinfo($uri, PATHINFO_FILENAME),
                'name' => $name,
            );
        }
    }
    // Find theme engines
    $engines = drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\\.engine$/', 'themes/engines');
    // Allow modules to add further theme engines.
    if ($module_engines = module_invoke_all('system_theme_engine_info')) {
        foreach ($module_engines as $name => $theme_engine_path) {
            $engines[$name] = (object) array(
                'uri' => $theme_engine_path,
                'filename' => basename($theme_engine_path),
                'name' => $name,
            );
        }
    }
    // Set defaults for theme info.
    $defaults = array(
        'engine' => 'phptemplate',
        'regions' => array(
            'sidebar_first' => 'Left sidebar',
            'sidebar_second' => 'Right sidebar',
            'content' => 'Content',
            'header' => 'Header',
            'footer' => 'Footer',
            'highlighted' => 'Highlighted',
            'help' => 'Help',
            'page_top' => 'Page top',
            'page_bottom' => 'Page bottom',
        ),
        'description' => '',
        'features' => _system_default_theme_features(),
        'screenshot' => 'screenshot.png',
        'php' => DRUPAL_MINIMUM_PHP,
        'stylesheets' => array(),
        'scripts' => array(),
    );
    $sub_themes = array();
    // Read info files for each theme
    foreach ($themes as $key => $theme) {
        $themes[$key]->filename = $theme->uri;
        $themes[$key]->info = drupal_parse_info_file($theme->uri) + $defaults;
        // The "name" key is required, but to avoid a fatal error in the menu system
        // we set a reasonable default if it is not provided.
        $themes[$key]->info += array(
            'name' => $key,
        );
        // Add the info file modification time, so it becomes available for
        // contributed modules to use for ordering theme lists.
        $themes[$key]->info['mtime'] = filemtime($theme->uri);
        // Invoke hook_system_info_alter() to give installed modules a chance to
        // modify the data in the .info files if necessary.
        $type = 'theme';
        drupal_alter('system_info', $themes[$key]->info, $themes[$key], $type);
        if (!empty($themes[$key]->info['base theme'])) {
            $sub_themes[] = $key;
        }
        if ($themes[$key]->info['engine'] == 'theme') {
            $filename = dirname($themes[$key]->uri) . '/' . $themes[$key]->name . '.theme';
            if (file_exists($filename)) {
                $themes[$key]->owner = $filename;
                $themes[$key]->prefix = $key;
            }
        }
        else {
            $engine = $themes[$key]->info['engine'];
            if (isset($engines[$engine])) {
                $themes[$key]->owner = $engines[$engine]->uri;
                $themes[$key]->prefix = $engines[$engine]->name;
                $themes[$key]->template = TRUE;
            }
        }
        // Prefix stylesheets and scripts with module path.
        $path = dirname($theme->uri);
        $theme->info['stylesheets'] = _system_info_add_path($theme->info['stylesheets'], $path);
        $theme->info['scripts'] = _system_info_add_path($theme->info['scripts'], $path);
        // Give the screenshot proper path information.
        if (!empty($themes[$key]->info['screenshot'])) {
            $themes[$key]->info['screenshot'] = $path . '/' . $themes[$key]->info['screenshot'];
        }
    }
    // Now that we've established all our master themes, go back and fill in data
    // for subthemes.
    foreach ($sub_themes as $key) {
        $themes[$key]->base_themes = drupal_find_base_themes($themes, $key);
        // Don't proceed if there was a problem with the root base theme.
        if (!current($themes[$key]->base_themes)) {
            continue;
        }
        $base_key = key($themes[$key]->base_themes);
        foreach (array_keys($themes[$key]->base_themes) as $base_theme) {
            $themes[$base_theme]->sub_themes[$key] = $themes[$key]->info['name'];
        }
        // Copy the 'owner' and 'engine' over if the top level theme uses a theme
        // engine.
        if (isset($themes[$base_key]->owner)) {
            if (isset($themes[$base_key]->info['engine'])) {
                $themes[$key]->info['engine'] = $themes[$base_key]->info['engine'];
                $themes[$key]->owner = $themes[$base_key]->owner;
                $themes[$key]->prefix = $themes[$base_key]->prefix;
            }
            else {
                $themes[$key]->prefix = $key;
            }
        }
    }
    return $themes;
}