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epsacrop.module in EPSA Crop - Image Cropping 8.2

Same filename and directory in other branches
  1. 6.2 epsacrop.module
  2. 6 epsacrop.module
  3. 7.2 epsacrop.module

The main file of module

@TODO Pass dialog popo throw theme functions @TODO Add the in place edition

File

epsacrop.module
View source 
<?php

/**
 * @file
 * The main file of module
 *
 * @TODO Pass dialog popo throw theme functions
 * @TODO Add the in place edition
 */

//JCrop & json2 Path
if (module_exists('libraries') && file_exists(libraries_get_path('Jcrop') . '/js/jquery.Jcrop.min.js') && file_exists(libraries_get_path('json2') . '/json2.js')) {
  define('EPSACROP_JCROP_PATH', libraries_get_path('Jcrop'));
  define('EPSACROP_JSON2_PATH', libraries_get_path('json2'));
}
else {
  $base = 'sites/all/libraries';
  if (file_exists($base . '/Jcrop/js/jquery.Jcrop.min.js') && file_exists($base . '/json2/json2.js')) {
    define('EPSACROP_JCROP_PATH', $base . '/Jcrop');
    define('EPSACROP_JSON2_PATH', $base . '/json2');
  }
  else {
    $path_module = drupal_get_path('module', 'epsacrop');
    define('EPSACROP_JCROP_PATH', $path_module . '/Jcrop');
    define('EPSACROP_JSON2_PATH', $path_module . '/json2');
  }
}

/**
 * Implements hook_permission.
 * 
 * @access public
 * @return void
 */
function epsacrop_permission() {
  return array(
    'epsacrop create crops' => array(
      'title' => t("Create crops"),
      'description' => t("Show the %label_link link in the field.", array(
        '%label_link' => t("mangage image crops"),
      )),
    ),
    'epsacrop edit all crops' => array(
      'title' => t("Edit crops"),
      'description' => t("Allow the user to edit coordinates for each style (show the link field)."),
    ),
    /*
    'epsacrop edit my crops' => array(
      'title' => t(""),
      'description' => t("")
    ),
    */
    'epsacrop delete all crops' => array(
      'title' => t("Delete crops"),
      'description' => t("Allow the user to delete coordinates and use the default style."),
    ),
    /*
    'epsacrop delete my crops' => array(
      'title' => t(""),
      'description' => t("")
    ),
    'epsacrop view all crops' => array(
      'title' => t(""),
      'description' => t("")
    ),
    'epsacrop view own crops' => array(
      'title' => t(""),
      'description' => t("")
    ),
    'epsacrop edit my crops in place' => array(
      'title' => t(""),
      'description' => t("")
    ),
    'epsacrop edit my crops with all styles' => array(
      'title' => t(""),
      'description' => t("")
    ),
    'epsacrop edit all crops with all styles' => array(
      'title' => t("Edit crop in place"),
      'description' => t("When it's a image from EPSACrop, add a link that allow the user edit coordonates in place.")
    ),
    */
    'epsacrop administer available crops' => array(
      'title' => t("Administer available crops"),
      'description' => t("Allow user to select which styles are shown in each field."),
    ),
  );
}

/**
 * Implements hook_menu.
 * 
 * @access public
 * @return array
 */
function epsacrop_menu() {
  $items = array();
  $items['crop/dialog/%/%/%/%'] = array(
    'title' => 'Dialog Crop',
    'page callback' => 'epsacrop_dialog',
    'page arguments' => array(
      2,
      3,
      4,
      5,
    ),
    'access callback' => '_epsacrop_access',
    'type' => MENU_CALLBACK,
  );
  $items['crop/ajax/%/%'] = array(
    'title' => 'Crop Dialog Ajax',
    'page callback' => 'epsacrop_ajax',
    'page arguments' => array(
      2,
      3,
    ),
    'access callback' => '_epsacrop_access',
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * epsacrop_dialog function.
 * 
 * @access public
 * @param string $entity_name
 * @param string $field_name
 * @param string $bundle
 * @param int $fid
 * @return void
 */
function epsacrop_dialog($entity_name, $field_name, $bundle, $fid) {
  $out = '<div class="epsacrop-global">' . "\n";
  $out .= '<div class="epsacrop-image-crop">' . "\n";
  $out .= '<img id="epsacrop-target" />' . "\n";
  $out .= '</div>' . "\n";
  $out .= '<div class="epsacrop-presets-menu">' . "\n";
  $out .= '<ul class="epsacrop-presets-menu-ul">' . "\n";
  $i = 0;
  $styles = _epsacrop_load_styles_by_instance($entity_name, $field_name, $bundle);
  foreach ($styles['styles'] as $style_name) {
    $style = _epsacrop_load_style($style_name);
    $effect = _epsacrop_get_effect($style);
    $id = 'epsacrop-' . $effect['ieid'] . '-' . $effect['isid'];
    $out .= '<li class="epsacrop-presets-menu-li"><a data-bgcolor="' . $effect['data']['jcrop_settings']['bgcolor'] . '" data-bgopacity="' . $effect['data']['jcrop_settings']['bgopacity'] . '" data-aspect-ratio="' . $effect['data']['jcrop_settings']['aspect_ratio'] . '" id="' . $id . '" href="javascript:Drupal.EPSACrop.crop(\'' . $id . '\');" rel="' . $effect['data']['width'] . 'x' . $effect['data']['height'] . '"' . ($i++ == 0 ? ' class="selected"' : '') . '>' . $style['name'] . '</a></li>';
  }
  $out .= '</ul>' . "\n";
  $out .= '</div>' . "\n";
  $data = _epsacrop_get_coords_from_fid($fid);
  if (!is_string($data)) {
    $data = drupal_json_encode($data);
  }
  $out .= '<div style="display:none;"><textarea id="epsacrop-coords-data">' . $data . '</textarea></div>' . "\n";
  $out .= '<br style="clear:both;" />' . "\n";
  $out .= '</div>' . "\n";
  $GLOBALS['devel_shutdown'] = FALSE;
  echo $out;
  drupal_exit();
}

/**
 * epsacrop_ajax function.
 * 
 * @access public
 * @param string $entity_name
 * @param string $field_name
 * @param string $bundle
 * @param string $fid
 * @return void
 */
function epsacrop_ajax($op, $fid) {
  $return = NULL;
  switch ($op) {
    case 'get':
      $return = _epsacrop_get_coords_from_fid($fid);
      if ($return == FALSE) {
        $return = array();
      }
      break;
    case 'put':
      if (isset($_POST) && (isset($_POST['coords']) && !empty($_POST['coords']))) {
        $coords = $_POST['coords'];
        $fid = $fid;
        _epsacrop_save_coords($fid, $coords);
      }
      break;
    case 'del':
      break;
  }
  drupal_json_output($return);
  drupal_exit();
}

/**
 * Implements hook_file_delete().
 * 
 * @access public
 * @param stdClass $file
 * @return void
 */
function epsacrop_file_delete($file) {
  _epsacrop_delete_file($file->fid);
}

/**
 * Implements hook_image_default_styles().
 * 
 * @access public
 * @return array
 */
function epsacrop_image_default_styles() {
  $styles = array();
  $styles['epsacrop_thumb'] = array();
  $styles['epsacrop_thumb']['effects'] = array(
    array(
      'name' => 'image_scale',
      'data' => array(
        'width' => 512,
        'height' => 384,
        'upscale' => 0,
      ),
      'weight' => 0,
    ),
  );
  return $styles;
}

/**
 * Implements hook_image_effect_info.
 * 
 * @access public
 * @return array
 */
function epsacrop_image_effect_info() {
  $effects = array();
  $effects['epsacrop_crop'] = array(
    'label' => t("EPSA Image Crop"),
    'help' => t(""),
    'effect callback' => 'epsacrop_crop_image',
    'form callback' => 'epsacrop_crop_image_form',
  );
  return $effects;
}

/**
 * Function that provide the effect form settings for dialog crop.
 * 
 * @access public
 * @param mixed $data
 * @return void
 */
function epsacrop_crop_image_form($data) {
  $data += array(
    'jcrop_settings' => array(
      'bgcolor' => 'black',
      'bgopacity' => '0.6',
    ),
  );

  //@TODO Propose a alternative style (whitout Crop Dialog effect) instead of this
  $form = image_crop_form($data);

  // Change description for the anchor
  $form['anchor']['#description'] = t("The part of the image that will be retained during the crop if no coordonates will set.");
  $form['jcrop_settings'] = array(
    '#type' => 'fieldset',
    '#title' => t("Advanced settings"),
    '#collapsed' => TRUE,
    '#collapsible' => TRUE,
  );
  $form['jcrop_settings']['aspect_ratio'] = array(
    '#type' => 'textfield',
    '#title' => t('Aspect Ratio'),
    '#description' => t("Aspect ratio of w/h (e.g. 1 for square)"),
    '#default_value' => isset($data['jcrop_settings']['aspect_ratio']) ? $data['jcrop_settings']['aspect_ratio'] : '',
    // '#field_suffix' => ' ' . t('pixels'),
    // '#required' => TRUE,
    '#size' => 10,
    '#element_validate' => array(
      '_epsacrop_aspect_ratio_validate',
    ),
  );

  /*
  $form['jcrop_settings']['minsize'] = array();
  $form['jcrop_settings']['maxsize'] = array();
  */
  $form['jcrop_settings']['bgcolor'] = array(
    '#type' => 'textfield',
    '#title' => t('Background color'),
    '#description' => t("Set color of background container"),
    '#default_value' => isset($data['jcrop_settings']['bgcolor']) ? $data['jcrop_settings']['bgcolor'] : '',
    // '#field_suffix' => ' ' . t('pixels'),
    '#required' => TRUE,
    '#size' => 10,
  );
  $form['jcrop_settings']['bgopacity'] = array(
    '#type' => 'textfield',
    '#title' => t('Background opacity'),
    '#description' => t("Opacity of outer image when cropping"),
    '#default_value' => isset($data['jcrop_settings']['bgopacity']) ? $data['jcrop_settings']['bgopacity'] : '',
    // '#field_suffix' => ' ' . t('pixels'),
    '#required' => TRUE,
    '#size' => 10,
  );
  return $form;
}

/**
 * Apply the effect to the image.
 * 
 * @access public
 * @param stdClass $image
 * @param array $settings
 * @return void
 */
function epsacrop_crop_image(stdClass $image, $settings) {
  $fid = _epsacrop_get_fid_from_uri($image->source);
  if (!empty($fid) && $fid > 0) {
    $coords = _epsacrop_get_coords_from_fid($fid);
    if (is_string($coords)) {
      $coords = drupal_json_decode($coords);
    }
    if (!empty($coords) && is_array($coords)) {
      $style_name = _epsacrop_get_style_name_from_url();
      if (!empty($style_name)) {
        $style = _epsacrop_load_style($style_name);
        if (!empty($style)) {
          $effect = _epsacrop_get_effect($style);
          if (!empty($effect)) {
            $preset = 'epsacrop-' . $effect['ieid'] . '-' . $effect['isid'];
            $coord = $coords[$fid][$preset];
            if (!empty($coord)) {
              if (image_crop($image, $coord['x'], $coord['y'], $coord['w'], $coord['h'])) {
                return image_resize($image, $settings['width'], $settings['height']);
              }
            }
          }
        }
      }
    }
  }
  return image_crop_effect($image, $settings);
}

/**
 * Implements hook_form_FORM_ID_alter().
 * 
 * @access public
 * @param array &$form
 * @param array $form_state
 * @return void
 */
function epsacrop_form_field_ui_field_edit_form_alter(&$form, $form_state) {
  if (user_access('epsacrop administer available crops')) {
    $field = $form['#field'];
    $settings = $form_state['build_info']['args'][0]['settings'];
    if (isset($field) && $field['type'] == 'image') {
      $styles = _epsacrop_load_styles();
      if (!empty($styles)) {
        $options = array();
        foreach ($styles as $style_name => $style) {
          $options[$style_name] = $style['name'];
        }
        $form['instance']['settings']['epsacrop'] = array(
          '#type' => 'fieldset',
          '#title' => t("EPSACrop settings"),
          '#collapsed' => FALSE,
          '#collapsible' => TRUE,
          '#tree' => TRUE,
        );
        $form['instance']['settings']['epsacrop']['styles'] = array(
          '#type' => 'checkboxes',
          '#title' => t("Availables EPSACrop styles"),
          '#description' => t("Select which styles should be available for this field"),
          '#options' => $options,
          '#default_value' => isset($settings['epsacrop']['styles']) ? $settings['epsacrop']['styles'] : array(),
        );

        //@TODO Add the possibility to change the size of dialog (for example, for field with only one style)

        /*
        $form['instance']['settings']['epsacrop']['dialog_width'] = array(
          '#type' => 'textfield',
          '#title' => t('Dialog width'),
          '#default_value' => isset($settings['epsacrop']['dialog_width']) ? $settings['epsacrop']['dialog_width'] : '512',
          '#field_suffix' => ' ' . t('pixels'),
          '#required' => TRUE,
          '#size' => 10,
        );

        $form['instance']['settings']['epsacrop']['dialog_height'] = array(
          '#type' => 'textfield',
          '#title' => t('Dialog height'),
          '#default_value' => isset($settings['epsacrop']['dialog_height']) ? $settings['epsacrop']['dialog_height'] : '384',
          '#field_suffix' => ' ' . t('pixels'),
          '#required' => TRUE,
          '#size' => 10,
        );
        */
      }
    }
  }
}

/**
 * Implements hook_element_info_alter.
 * 
 * @access public
 * @param array &$type
 * @return void
 */
function epsacrop_element_info_alter(&$type) {
  $type['managed_file']['#after_build'][] = '_epsacrop_process_form_element';
}

/**
 * Helper function that add a link in image widget field to open a dialog for the crops.
 * 
 * @access private
 * @return void
 */
function _epsacrop_process_form_element($element, $form_state) {
  if (user_access('epsacrop create crops') || user_access('epsacrop edit all crops')) {
    if (isset($element['#field_name'])) {
      _epsacrop_include_header_html();
      $styles = _epsacrop_load_styles_by_instance($element['#entity_type'], $element['#field_name'], $element['#bundle']);
      if (!empty($styles) && (isset($element['#file']) && is_object($element['#file']))) {
        $file = $element['#file'];
        $url = image_style_url('epsacrop_thumb', $file->uri);
        $info = image_get_info($file->uri);
        $element['epsacrop'] = array(
          '#type' => 'markup',
          '#markup' => "[<a href=\"javascript:Drupal.EPSACrop.dialog('" . $element['#entity_type'] . "', '" . $element['#field_name'] . "', '" . $element['#bundle'] . "', '" . $file->fid . "', '" . $url . "', [" . $info['width'] . "," . $info['height'] . "]);\">" . t("manage image crops") . "</a>]",
        );
      }
    }
  }
  return $element;
}

/**
 * Validate a aspect ration information.
 * 
 * @access public
 * @param array $element
 * @param array &$form_state
 * @return void
 */
function _epsacrop_aspect_ratio_validate($element, &$form_state) {
  $value = $element['#value'];
  if (!empty($value)) {
    $parts = explode('/', $value);
    if (count($parts) == 2) {
      if (!is_numeric($parts[0]) || !is_numeric($parts[1])) {
        form_error($element, t('Both parts of !name must be an integer.', array(
          '!name' => check_plain($element['#title']),
        )));
      }
    }
    elseif (!is_numeric($value)) {
      form_error($element, t('!name must be an integer.', array(
        '!name' => check_plain($element['#title']),
      )));
    }
  }
}

/**
 * Helper function that get all styles with epsacrop effect.
 * 
 * @access private
 * @return array
 */
function _epsacrop_load_styles() {
  $return = array();
  $styles = image_styles();
  foreach ($styles as $style_name => $style) {
    foreach ($style['effects'] as $sid => $effect) {
      if ($effect['module'] == 'epsacrop') {
        $return[$style_name] = $style;
        break;
      }
    }
  }
  return $return;
}

/**
 * This function load only on style that implement epsacrop effect.
 * 
 * @access private
 * @param string $style_name
 * @return bool
 */
function _epsacrop_load_style($style_name) {
  if (empty($style_name)) {
    return FALSE;
  }
  $styles = _epsacrop_load_styles();
  if (isset($styles[$style_name]) && !empty($styles[$style_name])) {
    return $styles[$style_name];
  }
  return FALSE;
}

/**
 * Return the effect issue from the module.
 * 
 * @access private
 * @param mixed $style
 * @return void
 */
function _epsacrop_get_effect($style) {
  if (empty($style) || !is_array($style) || (!isset($style['effects']) || !is_array($style['effects']))) {
    return FALSE;
  }
  foreach ($style['effects'] as $eid => $effect) {
    if ($effect['module'] == 'epsacrop') {
      return $effect;
    }
  }
  return FALSE;
}

/**
 * Get all style that are attach to one instance of field.
 * 
 * @access private
 * @param string $entity_type
 * @param string $field_name
 * @param string $bundle_name
 * @return array
 */
function _epsacrop_load_styles_by_instance($entity_type, $field_name, $bundle) {
  $instance = field_info_instance($entity_type, $field_name, $bundle);
  $styles = array();
  if (isset($instance['settings']['epsacrop']) && is_array($instance['settings']['epsacrop']['styles'])) {
    $instance['settings']['epsacrop']['styles'] = array_filter($instance['settings']['epsacrop']['styles']);
    if (isset($instance['settings']['epsacrop']['styles']) && !empty($instance['settings']['epsacrop']['styles'])) {
      $styles = $instance['settings']['epsacrop'];
    }
  }
  return $styles;
}

/**
 * Helper function that get the style name from image url.
 * 
 * @access private
 * @return void
 */
function _epsacrop_get_style_name_from_url() {
  $split = explode('/', $_GET['q']);
  $pointer = array_search('styles', $split);
  if ($pointer !== FALSE) {
    return $split[++$pointer];
  }
  return FALSE;
}

/**
 * This function include all files (JavaScript & CSS) needed by the module.
 * 
 * @access private
 * @return void
 */
function _epsacrop_include_header_html() {
  $module_path = drupal_get_path('module', 'epsacrop');
  drupal_add_js(array(
    'epsacrop' => array(
      'path' => $module_path,
    ),
  ), 'setting');
  drupal_add_library('system', 'ui.dialog');
  drupal_add_js(EPSACROP_JCROP_PATH . '/js/jquery.Jcrop.js');
  drupal_add_js(EPSACROP_JSON2_PATH . '/json2.js');
  drupal_add_js($module_path . '/js/epsacrop.js');
  drupal_add_css(EPSACROP_JCROP_PATH . '/css/jquery.Jcrop.css');
  drupal_add_css($module_path . '/css/epsacrop.css');
}

/**
 * Return the version of jcrop library.
 * 
 * @access public
 * @return void
 */
function _epsacrop_jcrop_get_version() {
  $version = 0;
  if (file_exists(EPSACROP_JCROP_PATH . '/js/jquery.Jcrop.js')) {
    $lines = file(EPSACROP_JCROP_PATH . '/js/jquery.Jcrop.js');
    array_shift($lines);

    // First line is simple comment
    if (preg_match('/v(.*)/', array_shift($lines), $matches)) {
      $version = $matches[1];
    }
    else {
      drupal_set_message(t('Could be give the version of Jcrop, check your install'), 'error');
      $version = 0;
    }
  }
  return $version;
}

/**
 * Check if json2.js is findable.
 * 
 * @access private
 * @return void
 */
function _epsacrop_is_json2_exists() {
  if (file_exists(EPSACROP_JSON2_PATH . '/json2.js')) {
    return TRUE;
  }
  drupal_set_message(t('Could be find the json2.js file, check your install'), 'error');
  return FALSE;
}

/**
 * Check if we've coordonates for one file.
 * 
 * @access private
 * @param int $fid
 * @return bool
 */
function _epsacrop_fid_exists($fid) {
  if (!empty($fid)) {
    return db_select('epsacrop_files', 'e')
      ->fields('e')
      ->condition('fid', $fid)
      ->execute()
      ->rowCount();
  }
  return 0;
}

/**
 * Insert coordonates for one file in the database.
 * 
 * @access private
 * @param int $fid
 * @param array $coords
 * @return void
 */
function _epsacrop_add_file($fid, $coords) {
  db_insert('epsacrop_files')
    ->fields(array(
    'fid' => $fid,
    'coords' => serialize($coords),
  ))
    ->execute();
}

/**
 * Save the coordonates in the database.
 * 
 * @access private
 * @param int $fid
 * @param array $coords
 * @return void
 */
function _epsacrop_save_coords($fid, $coords) {
  $affected = db_update('epsacrop_files')
    ->fields(array(
    'coords' => serialize($coords),
  ))
    ->condition('fid', $fid)
    ->execute();
  if ($affected == 0 && _epsacrop_fid_exists($fid) == 0) {
    _epsacrop_add_file($fid, $coords);
  }
  image_path_flush(_epsacrop_get_uri_from_fid($fid));
}

/**
 * Delete the coordonates in the database.
 * 
 * @access private
 * @param fid $fid
 * @return void
 */
function _epsacrop_delete_file($fid) {
  db_delete('epsacrop_files')
    ->condition('fid', $fid)
    ->execute();
}

/**
 * Get all coordonates for one file.
 * 
 * @access private
 * @param int $fid
 * @return array
 */
function _epsacrop_get_coords_from_fid($fid) {
  $files =& drupal_static(__FUNCTION__);
  if (empty($files[$fid])) {
    $files[$fid] = array();
    $has_coords = _epsacrop_fid_exists($fid);
    if ($has_coords != 0) {
      $result = db_select('epsacrop_files', 'e')
        ->fields('e', array(
        'coords',
      ))
        ->condition('e.fid', $fid)
        ->execute()
        ->fetchField();
      $files[$fid] = unserialize($result);
    }
    return $files[$fid];
  }
  return $files[$fid];
}

/**
 * Try to find the fid from a uri.
 * 
 * @access private
 * @param string $path
 * @return int
 */
function _epsacrop_get_fid_from_uri($uri) {
  $fids =& drupal_static(__FUNCTION__);
  $fids[$uri] = 0;
  if (empty($fids[$uri])) {
    $query = db_select('file_managed', 'f');
    $query
      ->leftjoin('epsacrop_files', 'e', 'e.fid = f.fid');
    $result = $query
      ->fields('f', array(
      'fid',
    ))
      ->condition('f.uri', $uri)
      ->range(0, 1)
      ->execute()
      ->fetchField();
    $fids[$uri] = (int) $result;
  }
  return $fids[$uri];
}

/**
 * Try to get the uri from a fid.
 * 
 * @access private
 * @param mixed $fid
 * @return void
 */
function _epsacrop_get_uri_from_fid($fid) {
  if (!empty($fid) && is_numeric($fid)) {
    return (string) db_select('file_managed', 'f')
      ->fields('f', array(
      'uri',
    ))
      ->condition('f.fid', $fid)
      ->range(0, 1)
      ->execute()
      ->fetchField();
  }
  return FALSE;
}

/**
 * Callback for hook_menu.
 * 
 * @access public
 * @param mixed $access
 * @return void
 */
function _epsacrop_access() {
  return user_access('epsacrop create crops') || user_access('epsacrop edit all crops');
}

Functions

Namesort descending Description
epsacrop_ajax epsacrop_ajax function.
epsacrop_crop_image Apply the effect to the image.
epsacrop_crop_image_form Function that provide the effect form settings for dialog crop.
epsacrop_dialog epsacrop_dialog function.
epsacrop_element_info_alter Implements hook_element_info_alter.
epsacrop_file_delete Implements hook_file_delete().
epsacrop_form_field_ui_field_edit_form_alter Implements hook_form_FORM_ID_alter().
epsacrop_image_default_styles Implements hook_image_default_styles().
epsacrop_image_effect_info Implements hook_image_effect_info.
epsacrop_menu Implements hook_menu.
epsacrop_permission Implements hook_permission.
_epsacrop_access Callback for hook_menu.
_epsacrop_add_file Insert coordonates for one file in the database.
_epsacrop_aspect_ratio_validate Validate a aspect ration information.
_epsacrop_delete_file Delete the coordonates in the database.
_epsacrop_fid_exists Check if we've coordonates for one file.
_epsacrop_get_coords_from_fid Get all coordonates for one file.
_epsacrop_get_effect Return the effect issue from the module.
_epsacrop_get_fid_from_uri Try to find the fid from a uri.
_epsacrop_get_style_name_from_url Helper function that get the style name from image url.
_epsacrop_get_uri_from_fid Try to get the uri from a fid.
_epsacrop_include_header_html This function include all files (JavaScript & CSS) needed by the module.
_epsacrop_is_json2_exists Check if json2.js is findable.
_epsacrop_jcrop_get_version Return the version of jcrop library.
_epsacrop_load_style This function load only on style that implement epsacrop effect.
_epsacrop_load_styles Helper function that get all styles with epsacrop effect.
_epsacrop_load_styles_by_instance Get all style that are attach to one instance of field.
_epsacrop_process_form_element Helper function that add a link in image widget field to open a dialog for the crops.
_epsacrop_save_coords Save the coordonates in the database.