array( 'title' => 'Width and Height cache', 'description' => 'Flush the image width and height cache if you are having issues with the display of your images.', 'page callback' => 'drupal_get_form', 'page arguments' => array( 'scratchpads_width_and_height_flush_image_cache_form' ), 'access arguments' => array( 'administer site configuration' ) ) ); } /** * Clear the image cache form. */ function scratchpads_width_and_height_flush_image_cache_form(){ return array( 'description' => array( '#markup' => '

' . t('Click the "Flush the cache" button below if you are experiencing issues with the aspect ratio of some images on your site.') . '

' ), 'actions' => array( '#type' => 'actions', 'submit' => array( '#type' => 'submit', '#value' => t('Flush the cache') ) ), '#theme' => 'system_settings_form' ); } function scratchpads_width_and_height_flush_image_cache_form_submit($form, $form_state){ drupal_set_message('Cache flushed'); $images = db_select('cache_image_sizes', 'i')->countQuery()->execute()->fetchField(); db_delete('cache_image_sizes')->execute(); drupal_set_message(t('Flushed @images from the cache', array( '@images' => $images ))); } /** * Returns HTML for an image. * * @param $variables * An associative array containing: * - path: Either the path of the image file (relative to base_path()) or a * full URL. * - width: The width of the image (if known). * - height: The height of the image (if known). * - alt: The alternative text for text-based browsers. HTML 4 and XHTML 1.0 * always require an alt attribute. The HTML 5 draft allows the alt * attribute to be omitted in some cases. Therefore, this variable defaults * to an empty string, but can be set to NULL for the attribute to be * omitted. Usually, neither omission nor an empty string satisfies * * accessibility requirements, so it is strongly encouraged for code calling * theme('image') to pass a meaningful value for this variable. * - http://www.w3.org/TR/REC-html40/struct/objects.html#h-13.8 * - http://www.w3.org/TR/xhtml1/dtds.html * - http://dev.w3.org/html5/spec/Overview.html#alt * - title: The title text is displayed when the image is hovered in some * popular browsers. * - attributes: Associative array of attributes to be placed in the img tag. */ function scratchpads_width_and_height_theme_image($variables){ if((!isset($variables['width']) || !$variables['width']) || (!isset($variables['height']) || !$variables['height'])){ $image_info = cache_get(md5($variables['path']), 'cache_image_sizes'); if(!$image_info || is_integer($image_info->data)){ // Set $image_info to false in case we fail to load the image. $image_info = FALSE; $failed_downloads = 0; if($image_info && is_integer($image_info->data)){ $failed_downloads = $image_info->data; } $image = FALSE; if($failed_downloads <= SCRATCHPADS_WIDTH_AND_HEIGHT_MAX_FAILED_DOWNLOADS){ if(substr($variables['path'], 0, 4) == 'http'){ $context = stream_context_create(array( 'http' => array( 'timeout' => 3 ) )); $request = drupal_http_request($variables['path'], array( 'timeout' => 3 )); if($request->code == 200){ $file = file_unmanaged_save_data($request->data, 'temporary://'); $path = drupal_realpath($file); if(substr($path, 0, 1) == '/' && file_exists($path) && filesize($path)){ $image = image_load($path); } unlink($path); } }else{ $image = image_load($variables['path']); } } // We only cache images with a file size (in case the file failed to download). if($image && $image->info && $image->info['file_size']){ $image_info = $image->info; cache_set(md5($variables['path']), $image_info, 'cache_image_sizes'); }else{ // We keep a track of the number of times we have failed to download // the image. If we reach SCRATCHPADS_WIDTH_AND_HEIGHT_MAX_FAILED_DOWNLOADS, // we never download the image again. $failed_downloads++; cache_set(md5($variables['path']), $failed_downloads, 'cache_image_sizes'); } }else{ $image_info = $image_info->data; } if($image_info){ $variables['height'] = $image_info['height']; $variables['width'] = $image_info['width']; } } $attributes = $variables['attributes']; $attributes['src'] = file_create_url($variables['path']); foreach(array( 'width', 'height', 'alt', 'title' ) as $key){ if(isset($variables[$key]) && !isset($attributes[$key])){ $attributes[$key] = $variables[$key]; } } return ''; }