public static function SvgSpriteGenerator::generateSprites in Icon Select 8

Generate an svg sprite-sheet from a vocabulary.

Parameters

string $vocabulary_id: Vocabulary ID.

Return value

string URI to the sprite-sheet.

4 calls to SvgSpriteGenerator::generateSprites()

drush_icon_select_generate_sprites in ./icon_select.drush.inc

Command callback. Generate a number of elements.

IconSelectCommands::sprites in src/Commands/IconSelectCommands.php

Create svg sprite map.

icon_select_taxonomy_term_postsave in ./icon_select.module

Implements hook_ENTITY_TYPE_postsave().

icon_select_vocabulary_form_submit in ./icon_select.module

Custom submit handler for updating / saving icon vocabulary.

File

src/Helper/SvgSpriteGenerator.php, line 22

Class

SvgSpriteGenerator

Helper class to generate SVG image maps.

Namespace

Drupal\icon_select\Helper

Code

public static function generateSprites($vocabulary_id) {

  /** @var \Drupal\taxonomy\TermStorageInterface $term_storage */
  $term_storage = \Drupal::entityTypeManager()
    ->getStorage('taxonomy_term');
  $terms = $term_storage
    ->loadTree($vocabulary_id, 0, NULL, TRUE);
  $sprite = '<svg xmlns="http://www.w3.org/2000/svg" ' . 'xmlns:xlink="http://www.w3.org/1999/xlink" ' . 'style="width:0; height:0; visibility:hidden; position:absolute;">';

  // Check for unique class name.
  foreach ($terms as $term) {
    if ($term->field_symbol_id->value) {
      $symbol_content = '';
      $symbol_viewbox = '0 0 88 88';
      $symbol_id = $term->field_symbol_id->value;
      $svg_file_content = NULL;
      try {
        $uri = $term->field_svg_file->entity
          ->getFileUri();
        $svg_file_content = file_exists($uri) ? file_get_contents($uri) : NULL;
      } catch (\Exception $e) {
        \Drupal::logger('icon_select')
          ->error($e
          ->getMessage());
      }
      $symbol_xml = simplexml_load_string($svg_file_content);
      if ($symbol_xml) {
        $symbol_xml
          ->registerXPathNamespace('svg', 'http://www.w3.org/2000/svg');
        $symbol_nodes = $symbol_xml
          ->xpath('/svg:svg/svg:*');
        foreach ($symbol_nodes as $node) {
          $symbol_content .= $node
            ->asXML();
        }
        if (isset($symbol_xml
          ->attributes()->viewBox)) {
          $symbol_viewbox = $symbol_xml
            ->attributes()->viewBox;
        }
        else {
          if (isset($symbol_xml
            ->attributes()->width) && isset($symbol_xml
            ->attributes()->height)) {
            $width = $symbol_xml
              ->attributes()->width;
            $height = $symbol_xml
              ->attributes()->height;
            $symbol_viewbox = '0 0 ' . $width . ' ' . $height;
          }
          else {
            $symbol_content = '<text font-size="16" y="0">Missing</text>';
            $symbol_content .= '<text font-size="16" y="20">viewBox</text>';
            $symbol_content .= '<text font-size="16" y="40">in icon</text>';
            $symbol_content .= '<text fill="red" font-size="16" y="60">' . $symbol_id . '</text>';
          }
        }
        $sprite .= '<symbol id="' . $symbol_id . '" viewBox="' . $symbol_viewbox . '">';
        $sprite .= $symbol_content;
        $sprite .= '</symbol>';
      }
      else {
        $message = t('Symbol with ID @symbol_id and Term ID @term_id could not be added to the SVG Sprite.', [
          '@symbol_id' => $symbol_id,
          '@term_id' => $term
            ->id(),
        ]);
        \Drupal::logger('icon_select')
          ->error($message);
      }
    }
  }
  $sprite .= '</svg>';

  // Create a new sanitizer instance.
  $sanitizer = new Sanitizer();

  // Pass the svg to the sanitizer and get it back clean.
  $sprite = $sanitizer
    ->sanitize($sprite);

  // Save MD5 Hash.
  $hash = md5($sprite);
  \Drupal::state()
    ->set('icon_select_hash', $hash);
  $destination = SvgSpriteGenerator::getSpriteDestinationPath();
  $dirname = \Drupal::service('file_system')
    ->dirname($destination);
  \Drupal::service('file_system')
    ->prepareDirectory($dirname, FileSystemInterface::CREATE_DIRECTORY);
  $file = file_save_data($sprite, $destination, FileSystemInterface::EXISTS_REPLACE);
  if ($file) {
    return $file
      ->getFileUri();
  }
  else {
    \Drupal::logger('icon_select')
      ->error(t('SVG sprite file could not be saved.'));
  }
}