image_effects.module in Image Effects 8

Provides effects and operations for the Image API.

File

image_effects.module

<?php

/**
 * @file
 * Provides effects and operations for the Image API.
 */
use Drupal\Component\Utility\Html;
use Drupal\Component\Utility\Unicode;
use Drupal\Core\Config\ConfigValueException;
use Drupal\image\ConfigurableImageEffectBase;
use Drupal\image_effects\Component\ColorUtility;
use Drupal\image\Entity\ImageStyle;

/**
 * Implements hook_theme().
 */
function image_effects_theme() {
  return [
    // Render a color information box and string.
    'image_effects_color_detail' => [
      'variables' => [
        'color' => '#000000',
        'border' => FALSE,
        'border_color' => '#000000',
      ],
    ],
    // Aspect switcher image effect - summary.
    'image_effects_aspect_switcher' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Background image effect - summary.
    'image_effects_background_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Brightness image effect - summary.
    'image_effects_brightness_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Color shift image effect - summary.
    'image_effects_color_shift_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Contrast image effect - summary.
    'image_effects_contrast_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Gaussian blur effect - summary.
    'image_effects_gaussian_blur_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // ImageMagick arguments effect - summary.
    'image_effects_imagemagick_arguments_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Mask image effect - summary.
    'image_effects_mask_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Mirror image effect - summary.
    'image_effects_mirror_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Opacity image effect - summary.
    'image_effects_opacity_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Resize percentage image effect - summary.
    'image_effects_resize_percentage_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Scale and Smart Crop image effect - summary.
    'image_effects_scale_and_smart_crop_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Set canvas image effect - summary.
    'image_effects_set_canvas_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Set transparent color image effect - summary.
    'image_effects_set_transparent_color_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Smart Crop image effect - summary.
    'image_effects_smart_crop_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Render a preview of the Text Overlay in the image effect UI.
    'image_effects_text_overlay_preview' => [
      'variables' => [
        'success' => FALSE,
        'preview' => [],
      ],
    ],
    // Text overlay image effect - summary.
    'image_effects_text_overlay_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Watemark image effect - summary.
    'image_effects_watermark_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Convolution image effect - summary.
    'image_effects_convolution_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Convolution sharpen image effect - summary.
    'image_effects_convolution_sharpen_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
    // Interlace image effect - summary.
    'image_effects_interlace_summary' => [
      'variables' => [
        'data' => NULL,
        'effect' => [],
      ],
    ],
  ];
}

/**
 * Implements hook_image_effects_text_overlay_text_alter().
 */
function image_effects_image_effects_text_overlay_text_alter(&$text, ConfigurableImageEffectBase $image_effect) {

  // Skip if the effect is not TextOverlayImageEffect or an alternative
  // implementation.
  if ($image_effect
    ->getPluginId() !== "image_effects_text_overlay") {
    return;
  }

  // Get effect data.
  $effect_data = $image_effect
    ->getConfiguration()['data'];

  // Strip HTML tags, if requested.
  if ($effect_data['text']['strip_tags'] === TRUE) {
    $text = strip_tags($text);
  }

  // Decode HTML entities, if requested.
  if ($effect_data['text']['decode_entities'] === TRUE) {
    $text = Html::decodeEntities($text);
  }

  // Convert case, if requested.
  if ($effect_data['text']['case_format']) {
    $method_map = [
      'upper' => 'strtoupper',
      'lower' => 'strtolower',
      'ucwords' => 'ucwords',
      'ucfirst' => 'ucfirst',
    ];
    $text = Unicode::{$method_map[$effect_data['text']['case_format']]}($text);
  }

  // Limit the maximum number of characters.
  if ($effect_data['text']['maximum_chars'] > 0 && Unicode::strlen($text) > $effect_data['text']['maximum_chars']) {
    $text = Unicode::substr($text, 0, $effect_data['text']['maximum_chars']) . $effect_data['text']['excess_chars_text'];
  }
}

/**
 * Prepares variables to get a color info.
 *
 * Default template: image-effects-color-detail.html.twig.
 */
function image_effects_preprocess_image_effects_color_detail(&$variables) {
  $variables['#attached']['library'][] = 'image_effects/image_effects.admin.ui';
  if ($variables['color']) {
    if ($variables['border']) {
      if ($variables['border_color'] == 'matchLuma') {
        $variables['border_color'] = ColorUtility::matchLuma($variables['color']);
      }
      else {
        $variables['border_color'] = Unicode::substr($variables['border_color'], 0, 7);
      }
    }
    $variables['color_opacity'] = ColorUtility::rgbaToOpacity($variables['color']);
    $variables['color'] = Unicode::substr($variables['color'], 0, 7);
  }
}

/**
 * Implements hook_ENTITY_TYPE_presave() for image_style entities.
 *
 * This hook checks if the image style that is being saved contains any aspect
 * switcher effect that refers to the image style itself. If so, this is a
 * circular reference and we should raise an exception.
 */
function image_effects_image_style_presave(ImageStyle $style) {
  $effects = $style
    ->getEffects();
  foreach ($effects as $effect) {
    $effect_data = $effect
      ->getConfiguration()['data'];
    switch ($effect
      ->getPluginId()) {
      case 'image_effects_aspect_switcher':
        if ($style
          ->id() === $effect_data['landscape_image_style']) {
          throw new ConfigValueException("You can not select the {$style->label()} image style itself for the landscape style");
        }
        if ($style
          ->id() === $effect_data['portrait_image_style']) {
          throw new ConfigValueException("You can not select the {$style->label()} image style itself for the portrait style");
        }
        break;
      default:
        continue 2;
    }
  }
}

/**
 * Implements hook_image_style_flush().
 *
 * This hook checks if the image style that is being flushed is used in any
 * aspect switcher effect. If so, the style that contains the aspect switcher
 * effect should be flushed as well.
 */
function image_effects_image_style_flush(ImageStyle $style) {

  // Retrieve image styles that have an aspect switcher effect that contains
  // the style being flushed.
  $query = \Drupal::entityQuery('image_style');
  $query
    ->condition('effects.*.id', 'image_effects_aspect_switcher');
  $group = $query
    ->orConditionGroup()
    ->condition('effects.*.data.landscape_image_style', $style
    ->id())
    ->condition('effects.*.data.portrait_image_style', $style
    ->id());
  $image_style_ids = $query
    ->condition($group)
    ->execute();

  // Flush them all.
  foreach ($image_style_ids as $image_style_id) {
    $image_style = ImageStyle::load($image_style_id);
    $image_style
      ->flush();
  }
}

Functions

Name	Description
image_effects_image_effects_text_overlay_text_alter	Implements hook_image_effects_text_overlay_text_alter().
image_effects_image_style_flush	Implements hook_image_style_flush().
image_effects_image_style_presave	Implements hook_ENTITY_TYPE_presave() for image_style entities.
image_effects_preprocess_image_effects_color_detail	Prepares variables to get a color info.
image_effects_theme	Implements hook_theme().