color_scheme_form_submit

color_scheme_form_submit($form, FormStateInterface $form_state)

function color_scheme_form_submit($form, FormStateInterface $form_state) {

  // Avoid color settings spilling over to theme settings.
  $color_settings = array('theme', 'palette', 'scheme');
  if ($form_state->hasValue('info')) {
    $color_settings[] = 'info';
  }
  foreach ($color_settings as $setting_name) {
    ${$setting_name}= $form_state->getValue($setting_name);
    $form_state->unsetValue($setting_name);
  }
  if (!isset($info)) {
    return;
  }

  $config = \Drupal::configFactory()->getEditable('color.theme.' . $theme);

  // Resolve palette.
  if ($scheme != '') {
    foreach ($palette as $key => $color) {
      if (isset($info['schemes'][$scheme]['colors'][$key])) {
        $palette[$key] = $info['schemes'][$scheme]['colors'][$key];
      }
    }
    $palette += $info['schemes']['default']['colors'];
  }

  // Make sure enough memory is available.
  if (isset($info['base_image'])) {
    // Fetch source image dimensions.
    $source = drupal_get_path('theme', $theme) . '/' . $info['base_image'];
    list($width, $height) = getimagesize($source);

    // We need at least a copy of the source and a target buffer of the same
    // size (both at 32bpp).
    $required = $width * $height * 8;
    // We intend to prevent color scheme changes if there isn't enough memory
    // available.  memory_get_usage(TRUE) returns a more accurate number than
    // memory_get_usage(), therefore we won't inadvertently reject a color
    // scheme change based on a faulty memory calculation.
    $usage = memory_get_usage(TRUE);
    $memory_limit = ini_get('memory_limit');
    $size = Bytes::toInt($memory_limit);
    if (!Environment::checkMemoryLimit($usage + $required, $memory_limit)) {
      drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="http://php.net/manual/ini.core.php#ini.sect.resource-limits">PHP documentation</a> for more information.', array('%size' => format_size($usage + $required - $size))), 'error');
      return;
    }
  }

  // Delete old files.
  $files = $config->get('files');
  if (isset($files)) {
    foreach ($files as $file) {
      @drupal_unlink($file);
    }
  }
  if (isset($file) && $file = dirname($file)) {
    @drupal_rmdir($file);
  }

  // No change in color config, use the standard theme from color.inc.
  if (implode(',', color_get_palette($theme, TRUE)) == implode(',', $palette)) {
    $config->delete();
    return;
  }

  // Prepare target locations for generated files.
  $id = $theme . '-' . substr(hash('sha256', serialize($palette) . microtime()), 0, 8);
  $paths['color'] = 'public://color';
  $paths['target'] = $paths['color'] . '/' . $id;
  foreach ($paths as $path) {
    file_prepare_directory($path, FILE_CREATE_DIRECTORY);
  }
  $paths['target'] = $paths['target'] . '/';
  $paths['id'] = $id;
  $paths['source'] = drupal_get_path('theme', $theme) . '/';
  $paths['files'] = $paths['map'] = array();

  // Save palette and logo location.
  $config
  ->set('palette', $palette)
    ->set('logo', $paths['target'] . 'logo.svg')
    ->save();

  // Copy over neutral images.
  foreach ($info['copy'] as $file) {
    $base = drupal_basename($file);
    $source = $paths['source'] . $file;
    $filepath = file_unmanaged_copy($source, $paths['target'] . $base);
    $paths['map'][$file] = $base;
    $paths['files'][] = $filepath;
  }

  // Render new images, if image has been provided.
  if (isset($info['base_image'])) {
    _color_render_images($theme, $info, $paths, $palette);
  }

  // Rewrite theme stylesheets.
  $css = array();
  foreach ($info['css'] as $stylesheet) {
    // Build a temporary array with CSS files.
    $files = array();
    if (file_exists($paths['source'] . $stylesheet)) {
      $files[] = $stylesheet;
    }

    foreach ($files as $file) {
      $css_optimizer = new CssOptimizer();
      // Aggregate @imports recursively for each configured top level CSS file
      // without optimization. Aggregation and optimization will be
      // handled by drupal_build_css_cache() only.
      $style = $css_optimizer->loadFile($paths['source'] . $file, FALSE);

      // Return the path to where this CSS file originated from, stripping
      // off the name of the file at the end of the path.
      $css_optimizer->rewriteFileURIBasePath = base_path() . dirname($paths['source'] . $file) . '/';

      // Prefix all paths within this CSS file, ignoring absolute paths.
      $style = preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', array($css_optimizer, 'rewriteFileURI'), $style);

      // Rewrite stylesheet with new colors.
      $style = _color_rewrite_stylesheet($theme, $info, $paths, $palette, $style);
      $base_file = drupal_basename($file);
      $css[] = $paths['target'] . $base_file;
      _color_save_stylesheet($paths['target'] . $base_file, $style, $paths);
    }
  }

  // Maintain list of files.
  $config
  ->set('stylesheets', $css)
    ->set('files', $paths['files'])
    ->save();
}