dragndrop_upload_image.module in Drag & Drop Upload 7

Provides Drag & Drop Upload widget for an Image field.

File

modules/dragndrop_upload_image/dragndrop_upload_image.module

<?php

/**
 * @file
 * Provides Drag & Drop Upload widget for an Image field.
 */

/**
 * Implements hook_theme().
 */
function dragndrop_upload_image_theme($existing, $type, $theme, $path) {
  return array(
    'dnd_upload_droppable_area_image' => array(
      'render element' => 'element',
      'template' => 'dnd-upload-droppable-area-image',
      'path' => $path . '/templates',
    ),
  );
}

/**
 * Implements hook_field_widget_info().
 */
function dragndrop_upload_image_field_widget_info() {
  $dnd_upload_widget_info = dragndrop_upload_file_field_widget_info();
  $info['dragndrop_upload_image'] = $dnd_upload_widget_info['dragndrop_upload_file'];
  $info['dragndrop_upload_image']['field types'] = array(
    'image',
  );
  $info['dragndrop_upload_image']['settings'] += array(
    'preview_image_style' => 'thumbnail',
  );
  return $info;
}

/**
 * Implements hook_field_widget_settings_form().
 */
function dragndrop_upload_image_field_widget_settings_form($field, $instance) {
  $form = image_field_widget_settings_form($field, $instance);

  // Unset 'progress_indicator', as it will be added
  // in dragndrop_upload_file_field_widget_settings_form().
  unset($form['progress_indicator']);
  $form = array_merge_recursive($form, dragndrop_upload_file_field_widget_settings_form($field, $instance));
  return $form;
}

/**
 * Implements hook_field_widget_form().
 *
 * @see image_field_widget_form()
 */
function dragndrop_upload_image_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {

  // Add display_field setting to field because file_field_widget_form()
  // assumes it is set.
  $field['settings']['display_field'] = 0;
  $elements = dragndrop_upload_file_field_widget_form($form, $form_state, $field, $instance, $langcode, $items, $delta, $element);
  $instance_settings = $instance['settings'];
  $widget_settings = $instance['widget']['settings'];
  $element_info = element_info('dragndrop_upload');
  $pre_render = array_merge($element_info['#pre_render'], array(
    'dragndrop_upload_image_pre_render',
  ));
  foreach (element_children($elements) as $delta) {

    // Add upload resolution validation.
    if ($instance_settings['max_resolution'] || $instance_settings['min_resolution']) {
      $elements[$delta]['#upload_validators']['file_validate_image_resolution'] = array(
        $instance_settings['max_resolution'],
        $instance_settings['min_resolution'],
      );
    }
    $_validators = $elements[$delta]['#upload_validators'];

    // If not using custom extension validation, ensure this is an image.
    $supported_extensions = array(
      'png',
      'gif',
      'jpg',
      'jpeg',
    );
    if (isset($_validators['file_validate_extensions'][0])) {
      $extensions = array_intersect(explode(' ', $_validators['file_validate_extensions'][0]), $supported_extensions);
    }
    else {
      $extensions = $supported_extensions;
    }
    $_validators['file_validate_extensions'][0] = implode(' ', $extensions);

    // Add all extra functionality provided by the image widget.
    $elements[$delta]['#process'][] = 'image_field_widget_process';
    $elements[$delta]['#process'][] = 'dragndrop_upload_image_widget_process';
    $elements[$delta]['#preview_image_style'] = $widget_settings['preview_image_style'];
  }
  if ($field['cardinality'] == 1) {

    // If there's only one field, return it as delta 0.
    if (empty($elements[0]['#default_value']['fid'])) {
      $elements[0]['#description'] = theme('file_upload_help', array(
        'description' => $instance['description'],
        'upload_validators' => $elements[0]['#upload_validators'],
      ));
    }
  }
  else {
    $elements['#file_upload_description'] = theme('file_upload_help', array(
      'upload_validators' => $elements[0]['#upload_validators'],
    ));
  }

  // Set full pre render list to the last element only.
  $elements[$delta]['#pre_render'] = $pre_render;
  return $elements;
}

/**
 * Custom process callback for the 'dragndrop_upload_image' widget.
 */
function dragndrop_upload_image_widget_process($element, &$form_state, $form) {
  $element['droppable_area']['#theme'] = 'dnd_upload_droppable_area_image';
  $path = drupal_get_path('module', 'dragndrop_upload_image');
  $element['#attached']['css'][] = $path . '/css/dragndrop-upload-image.css';
  return $element;
}

/**
 * Pre render callback for the widget.
 */
function dragndrop_upload_image_pre_render($element) {
  if (isset($element['droppable_area']['#access']) && !$element['droppable_area']['#access']) {
    return $element;
  }

  // Add dragndrop_upload_file js at first.
  $path = drupal_get_path('module', 'dragndrop_upload_file');
  $element['#attached']['js'][] = array(
    'type' => 'file',
    'data' => $path . '/js/dragndrop-upload-file.class.js',
    'weight' => 5.31,
  );
  $element['#attached']['js'][] = array(
    'type' => 'file',
    'data' => $path . '/js/dragndrop-upload-file.js',
    'weight' => 5.32,
  );
  $path = drupal_get_path('module', 'dragndrop_upload_image');
  $element['#attached']['js'][] = array(
    'type' => 'file',
    'data' => $path . '/js/dragndrop-upload-image.class.js',
    'weight' => 5.41,
  );
  $element['#attached']['js'][] = array(
    'type' => 'file',
    'data' => $path . '/js/dragndrop-upload-image.js',
    'weight' => 5.42,
  );
  $element['#attached']['js'][] = array(
    'type' => 'setting',
    'data' => array(
      'dragndropUploadImage' => array(
        '#' . $element['droppable_area']['#dnd_id'],
      ),
    ),
  );
  return $element;
}

/**
 * Implementation of hook_insert_widgets()
 * - Provides integration support for the 'Insert' module
 */
function dragndrop_upload_image_insert_widgets() {
  return array(
    'dragndrop_upload_image' => array(
      'element_type' => 'dragndrop_upload',
      'wrapper' => '.image-widget',
      'fields' => array(
        'alt' => 'input[name$="[alt]"], textarea[name$="[alt]"]',
        'title' => 'input[name$="[title]"], textarea[name$="[title]"]',
        'description' => 'input[name$="[description]"], textarea[name$="[description]"]',
      ),
    ),
  );
}

/**
 * Implements hook_focal_point_supported_widget_types_alter().
 *
 * Adds integration with module Focal Point.
 */
function dragndrop_upload_image_focal_point_supported_widget_types_alter(&$supported) {
  $supported[] = 'dragndrop_upload_image';
}

/**
 * Process callback of dragndrop_upload_image widget for Focal Point module.
 *
 * Adds integration with module Focal Point.
 *
 * @see focal_point_field_widget_form_alter().
 */
function focal_point_widget_dragndrop_upload_image_process($element, &$form_state, $form) {
  return focal_point_widget_image_image_process($element, $form_state, $form);
}

Functions

Name	Description
dragndrop_upload_image_field_widget_form	Implements hook_field_widget_form().
dragndrop_upload_image_field_widget_info	Implements hook_field_widget_info().
dragndrop_upload_image_field_widget_settings_form	Implements hook_field_widget_settings_form().
dragndrop_upload_image_focal_point_supported_widget_types_alter	Implements hook_focal_point_supported_widget_types_alter().
dragndrop_upload_image_insert_widgets	Implementation of hook_insert_widgets()
dragndrop_upload_image_pre_render	Pre render callback for the widget.
dragndrop_upload_image_theme	Implements hook_theme().
dragndrop_upload_image_widget_process	Custom process callback for the 'dragndrop_upload_image' widget.
focal_point_widget_dragndrop_upload_image_process	Process callback of dragndrop_upload_image widget for Focal Point module.