eads@1: <?php
eads@1: 
eads@2: // A suffix for auto generated IDs
eads@2: define(DND_ID_SUFFIX, '-dnd-library');
eads@2: 
eads@1: /**
eads@1:  * Implementation of hook_menu().
eads@1:  */
eads@1: function dnd_menu() {
eads@1:   $items = array();
eads@1:   $items['admin/settings/dnd'] = array(
eads@1:     'title' => 'Drag and Drop Library',
eads@1:     'page callback' => 'dnd_admin',
eads@1:     'description' => 'Configure drag-and-drop enabled textareas.',
eads@1:     'access arguments' => array('administer dnd'),
eads@1:     'file' => 'dnd.admin.inc',
eads@1:   );
eads@1:   return $items;
eads@1: }
eads@1: 
eads@1: /**
eads@1:  * Implementation of hook_perm().
eads@1:  */
eads@1: function dnd_perm() {
eads@1:   return array('administer dnd');
eads@1: }
eads@2: 
eads@2: /**
eads@2:  * Implementation of hook_theme().
eads@2:  */
eads@2: function dnd_theme() {
eads@2:   return array(
eads@2:     'dnd_library' => array('arguments' => array('element' => NULL, 'settings' => NULL), 'template' => 'dnd-library'),
eads@2:   );
eads@2: }
eads@2: 
eads@2: 
eads@2: /**
eads@2:  * Implementation of hook_elements().
eads@2:  *
eads@2:  * Overload textareas.
eads@2:  */
eads@2: function dnd_elements() {
eads@2:   $type = array();
eads@2:   $type['textarea'] = array(
eads@2:     '#input' => TRUE, 
eads@2:     '#cols' => 60, 
eads@2:     '#rows' => 5, 
eads@2:     '#resizable' => TRUE,
eads@2:     '#dnd-enabled' => FALSE,
eads@2:     '#dnd-settings' => NULL,
eads@2:     '#process' => array('form_expand_ahah', 'dnd_process_textarea'),
eads@2:   );
eads@2:   return $type;
eads@2: }
eads@2: 
eads@2: /**
eads@2:  * Settings array:
eads@2:  * What should it take, if anything?  Probably a source...
eads@2:  * maybe editor specific configuration shit? 
eads@2:  *
eads@2:  * - source for library json/ajax shit
eads@2:  * - target selector
eads@2:  * - item selector
eads@2:  *
eads@2:  * perhaps like so:  
eads@2:  *
eads@2:  * global => 
eads@2:  *   droppable targets
eads@2:  *   library source for textarea
eads@2:  * 
eads@2:  * tinymce/othereditor =>
eads@2:  *   target selector logic
eads@2:  *   configuration options
eads@2:  *   callback should be smart about attachment and detachment
eads@2:  */
eads@2: function dnd_process_textarea($element, $form_state) {
eads@2:   if ($element['#dnd-enabled']) {
eads@2: 
eads@4:     drupal_add_js(drupal_get_path('module', 'dnd') .'/js/dnd.js', 'footer');
eads@4:     drupal_add_js(drupal_get_path('module', 'dnd') .'/js/dnd-library.js', 'footer');
eads@2: 
eads@2:     $settings = array();
eads@2: 
eads@2:     // We take a string or an 
eads@2:     if (is_string($element['#dnd-settings'])) {
eads@2:       // @TODO load settings
eads@2:     } 
eads@2:     else if (is_object($element['#dnd-settings'])) {
eads@2:       $settings = (array) $element['#dnd-settings'];
eads@2:     }
eads@2:     else if (is_array($element['#dnd-settings'])) {
eads@2:       $settings = $element['#dnd-settings'];
eads@2:     }
eads@2: 
eads@2:     // Set some important defaults
eads@2:     $settings = array('library_id' => $element['#id'] . DND_ID_SUFFIX) + $settings;
eads@2: 
eads@2:     // Add enabled libraries to settings for tracking
eads@2:     drupal_add_js(array(
eads@2:       'dndEnabledLibraries' => array($element['#id'] => $settings),
eads@2:     ), 'setting');
eads@2: 
eads@2:     $element['#prefix'] = theme('dnd_library', $element, $settings);
eads@2:   }
eads@2:   return $element;
eads@2: }
eads@2: 
eads@2: function template_preprocess_dnd_library(&$variables) {
eads@2:   global $base_url;
eads@2:   list($element, $settings) = array($variables['element'], $variables['settings']);
eads@2: 
eads@2:   // Get library via a backdoor HTTP request.  This is plenty fast for this
eads@2:   // application and keeps things nice and consistent.
eads@2:   if (!($url = parse_url($settings['url']))) {
eads@2:     return t('This library is not available');
eads@2:   }
eads@2: 
eads@2:   // Handle both relative and absolute urls
eads@2:   if (!isset($url['scheme'])) {
eads@2:     $settings['url'] = $base_url .'/'. $settings['url'];
eads@2:   }
eads@2: 
eads@2:   $request = drupal_http_request($settings['url']);
eads@2: 
eads@2:   // We must remove some Drupal escaping
eads@2:   $json = json_decode(str_replace(array('\x3c', '\x3e', '\x26'), array("<", ">", "&"), $request->data), TRUE);
eads@2: 
eads@4:   // Generate an array of editor representations to add
eads@4:   foreach ($json['editor_representations'] as $editor_id=>$editor_item) {
eads@4:     $editor_representations[$editor_id] = filter_xss_admin($editor_item);
eads@2:   }
eads@2: 
eads@4:   // Store editor representations in Drupal setting
eads@4:   drupal_add_js(array('dndEditorRepresentations' => $editor_representations,), 'setting');
eads@4: 
eads@2:   $variables['library_id'] = $settings['library_id'];
eads@4:   $variables['header']     = filter_xss_admin($json['header']);
eads@4:   $variables['library']    = filter_xss_admin($json['library']);
eads@4:   $variables['footer']     = filter_xss_admin($json['footer']);
eads@2: }