function ThemeInitialization::getActiveTheme

Overrides ThemeInitializationInterface::getActiveTheme

File

core/lib/Drupal/Core/Theme/ThemeInitialization.php, line 160

Class

ThemeInitialization

Provides the theme initialization logic.

Namespace

Code

public function getActiveTheme(Extension $theme, array $base_themes = []) {
    $theme_path = $theme->getPath();
    $values['path'] = $theme_path;
    $values['name'] = $theme->getName();
    // Use the logo declared in this themes info file, otherwise use logo.svg
    // from the themes root.
    if (!empty($theme->info['logo'])) {
        $values['logo'] = $theme->getPath() . '/' . $theme->info['logo'];
    }
    else {
        $values['logo'] = $theme->getPath() . '/logo.svg';
    }
    // Prepare libraries overrides from this theme and ancestor themes. This
    // allows child themes to easily remove CSS files from base themes and
    // modules.
    $values['libraries_override'] = [];
    // Get libraries overrides declared by base themes.
    foreach (array_reverse($base_themes) as $base) {
        if (!empty($base->info['libraries-override'])) {
            foreach ($base->info['libraries-override'] as $library => $override) {
                $values['libraries_override'][$base->getPath()][$library] = $override;
            }
        }
    }
    // Add libraries overrides declared by this theme.
    if (!empty($theme->info['libraries-override'])) {
        foreach ($theme->info['libraries-override'] as $library => $override) {
            $values['libraries_override'][$theme->getPath()][$library] = $override;
        }
    }
    // Get libraries extensions declared by base themes.
    foreach ($base_themes as $base) {
        if (!empty($base->info['libraries-extend'])) {
            foreach ($base->info['libraries-extend'] as $library => $extend) {
                if (isset($values['libraries_extend'][$library])) {
                    // Merge if libraries-extend has already been defined for this
                    // library.
                    $values['libraries_extend'][$library] = array_merge($values['libraries_extend'][$library], $extend);
                }
                else {
                    $values['libraries_extend'][$library] = $extend;
                }
            }
        }
    }
    // Add libraries extensions declared by this theme.
    if (!empty($theme->info['libraries-extend'])) {
        foreach ($theme->info['libraries-extend'] as $library => $extend) {
            if (isset($values['libraries_extend'][$library])) {
                // Merge if libraries-extend has already been defined for this
                // library.
                $values['libraries_extend'][$library] = array_merge($values['libraries_extend'][$library], $extend);
            }
            else {
                $values['libraries_extend'][$library] = $extend;
            }
        }
    }
    // Do basically the same as the above for libraries
    $values['libraries'] = [];
    // Grab libraries from base theme
    foreach ($base_themes as $base) {
        if (!empty($base->libraries)) {
            foreach ($base->libraries as $library) {
                $values['libraries'][] = $library;
            }
        }
    }
    // Add libraries used by this theme.
    if (!empty($theme->libraries)) {
        foreach ($theme->libraries as $library) {
            $values['libraries'][] = $library;
        }
    }
    $values['engine'] = $theme->engine ?? NULL;
    $values['owner'] = $theme->owner ?? NULL;
    $values['extension'] = $theme;
    $base_active_themes = [];
    foreach ($base_themes as $base_theme) {
        $base_active_themes[$base_theme->getName()] = $base_theme;
    }
    $values['base_theme_extensions'] = $base_active_themes;
    if (!empty($theme->info['regions'])) {
        $values['regions'] = $theme->info['regions'];
    }
    return new ActiveTheme($values);
}