Added easier support for AHAH

tripal_core/api/tripal_core.ahah.inc

@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * @file
+ * Part of the Tripal Core API.
+ *
+ * Provides support for dynamic forms through AHAH
+ */
+
+/*
+ * This function simply gets the posted form ID, builds the form
+ * and retrieves the specified element
+ */
+function tripal_core_ahah_prepare_form() {
+  
+  // Retrieve the form from the cache
+  $form_state = array('storage' => NULL);
+  $form_build_id = filter_xss($_POST['form_build_id']);
+  $form = form_get_cache($form_build_id, $form_state);
+
+  // Preparing to process the form
+  $args = $form['#parameters'];
+  $form_id = array_shift($args);
+  $form_state['post'] = $form['#post'] = $_POST;
+  $form['#programmed'] = $form['#redirect'] = FALSE;
+
+  // we don't want to submit the form or have required fields validated on
+  // an ahah callback.
+  $form_state['submitted'] = TRUE;
+  $form['#validate'] = NULL;
+  $form['#submit'] = NULL;
+  $form_state['submit_handlers'] = NULL;
+  $form_state['validate_handlers'] = NULL;
+  tripal_core_ahah_form_element_disable_validation($form);
+
+  // Sets the form_state so that the validate and submit handlers can tell
+  // when the form is submitted via AHAH
+  $form_state['ahah_submission'] = TRUE;
+
+  // Process the form with drupal_process_form. This function calls the submit
+  // handlers, which put whatever was worthy of keeping into $form_state.
+  drupal_process_form($form_id, $form, $form_state);
+  
+  // You call drupal_rebuild_form which destroys $_POST.
+  // The form generator function is called and creates the form again but since
+  // it knows to use $form_state, the form will be different.
+  // The new form gets cached and processed again, but because $_POST is
+  // destroyed, the submit handlers will not be called again.
+  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);
+  
+
+  return $form;
+}
+
+/*
+ * 
+ */
+function tripal_core_ahah_bind_events() {
+  
+  // Get the JS settings so we can merge them.
+  $javascript = drupal_add_js(NULL, NULL, 'header');
+  $settings = call_user_func_array('array_merge_recursive', $javascript['setting']);
+  
+  return array('ahah' => $settings['ahah']);
+}
+
+/*
+ * 
+ */
+function tripal_core_ahah_form_element_disable_validation(&$form) {
+  // --START code borrowed from ahah_helper module
+  foreach (element_children($form) as $child) {
+    $form[$child]['#validated'] = TRUE;
+    tripal_core_ahah_form_element_disable_validation($form[$child]);
+  }
+  // --END code borrowed from ahah_helper module
+}

tripal_core/api/tripal_core.api.inc

@@ -2,6 +2,7 @@
 
 require_once "tripal_core.schema_v1.2.api.inc";
 require_once "tripal_core.schema_v1.11.api.inc";
+require_once "tripal_core.ahah.inc";
 
 /**
  * @file