first import

sites/all/modules/mb/mb_extra/mb_extra.admin.inc

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+<?php
+
+/*
+ * @file
+ * Function file to administer the MB Extra module settings.
+ */
+
+/**
+ * Provides the MB Extra settings form.
+ */
+function mb_extra_admin() {
+  $module = 'mb_extra';
+  $form = array();
+
+  $description_tabs_destination = '<p>' . t('Use the node local task links with destination parameter.') . '</p>';
+  $description_tabs_destination .= '<p>' . t('If activated the %overlay module is not available this feature.', array('%overlay' => t('Overlay'))) . '</p>';
+
+  $form[$module]['tabs_destination'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Content local tasks'),
+    '#description' => $description_tabs_destination,
+    '#collapsible' => false,
+    '#collapsed' => false,
+    '#tree' => true
+  );
+  $form[$module]['tabs_destination'][$module . '_destination_tabs'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Enable node tab links with destination parameter.'),
+    '#default_value' => variable_get($module . '_destination_tabs', 0)
+  );
+
+  $form[$module]['confirm_cancel'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Confirm cancel'),
+    '#description' => '<p>' . t('Alter the confirm form cancel link to display it as button.') . '</p>',
+    '#collapsible' => false,
+    '#collapsed' => false,
+    '#tree' => true
+  );
+  $form[$module]['confirm_cancel'][$module . '_confirm_cancel'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Display link as button'),
+    '#default_value' => variable_get($module . '_confirm_cancel', 0)
+  );
+
+  $form['submit']['save'] = array(
+    '#type' => 'submit',
+    '#name' => 'save',
+    '#value' => t('Save')
+  );
+  $form['submit']['reset'] = array(
+    '#type' => 'submit',
+    '#name' => 'reset',
+    '#value' => t('Reset to defaults'),
+  );
+
+  return $form;
+}
+
+/**
+ * Display the MB Extra settings form page.
+ *
+ * @return
+ *   The complete HTML formatted administer page.
+ */
+function theme_mb_extra_admin($variables) {
+  _mb_load_css('admin');
+
+  $module = 'mb_extra';
+  $output  = '';
+
+  $form = drupal_get_form($module . '_admin');
+
+  $output .= drupal_render($output);
+
+  return $output;
+}
+
+/**
+ * Save settings from admin form.
+ */
+function mb_extra_admin_submit($form, &$form_state) {
+  $module = 'mb_extra';
+
+  if ($form_state['clicked_button']['#id'] == 'edit-save') {
+    variable_set($module . '_destination_tabs', $form_state['values']['tabs_destination'][$module . '_destination_tabs']);
+    variable_set($module . '_confirm_cancel', $form_state['values']['confirm_cancel'][$module . '_confirm_cancel']);
+
+    drupal_set_message(t('The %module settings have been saved.', array('%module' => t('More Buttons Extra'))), 'status');
+  }
+  elseif ($form_state['clicked_button']['#id'] == 'edit-reset') {
+    $form_state['redirect'] = 'admin/config/mb/buttons/more-buttons-extra/reset';
+  }
+}
+
+/**
+ * Menu callback to define the confirm form output.
+ *
+ * @return
+ *   The confirm form.
+ */
+function mb_extra_reset() {
+  $question = t('Are you sure you want to reset all %module settings?', array('%module' => t('More Buttons Extra')));
+
+  $information = '<p>' . t('This action disables the extra settings. This action cannot be undone.') . '</p>';
+
+  return confirm_form(array(),
+    $question,
+    array('path' => 'admin/config/mb/buttons/more-buttons-extra', 'attributes' => array('class' => 'button')), $information,
+    t('Reset'),
+    t('Cancel')
+  );
+}
+
+/**
+ * Resave extras system variables of the MB Content module to reset the module extra settings.
+ */
+function mb_extra_reset_submit($form, &$form_state) {
+  // Resave variables.
+  variable_set('mb_extra_destination_tabs', 0);
+  variable_set('mb_extra_confirm_cancel', 0);
+
+  drupal_set_message(t('The %module settings have been set back.', array('%module' => t('More Buttons Extra'))), 'status');
+  watchdog('More Buttons Extra', 'The %module settings have been set back.', array('%module' => t('More Buttons Extra')), WATCHDOG_NOTICE, l(t('view'), 'admin/config/mb/buttons/more-buttons-extra'));
+
+  $form_state['redirect'] = 'admin/config/mb/buttons/more-buttons-extra';
+}

sites/all/modules/mb/mb_extra/mb_extra.info

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+name = More Buttons Extra
+description = "Provides various functions for the expansion of core modules."
+package = "More Buttons"
+dependencies[] = mb
+core = 7.x
+files[] = mb_extra.module
+files[] = mb_extra.admin.inc
+
+; Information added by drupal.org packaging script on 2011-02-25
+version = "7.x-1.x-dev"
+core = "7.x"
+project = "mb"
+datestamp = "1298619614"
+

sites/all/modules/mb/mb_extra/mb_extra.install

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+<?php
+
+/**
+ * @file
+ * Installs, updates, and uninstalls More Buttons Extra.
+ */
+
+/**
+ * Implements hook_uninstall().
+ */
+function mb_extra_uninstall() {
+  // Remove variables.
+  variable_del('mb_extra_destination_tabs');
+  variable_del('mb_extra_confirm_cancel');
+}

sites/all/modules/mb/mb_extra/mb_extra.module

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+<?php
+
+/**
+ * @file
+ * Provides various functions for the expansion of core modules.
+ *
+ * Implemented:
+ * - Alter menu local task links from node to insert destination parameter.
+ *   Children tabs supported to level 1.
+ * - Alter the confirm form cancel link to display the link as button.
+ */
+
+/**
+ * Implements hook_menu().
+ */
+function mb_extra_menu() {
+  $items = array();
+
+  $items['admin/config/mb/buttons/more-buttons-extra'] = array(
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('mb_extra_admin'),
+    'title' => 'Extras',
+    'access arguments' => array('administer site configuration'),
+    'file' => 'mb_extra.admin.inc',
+    'type' => MENU_LOCAL_TASK,
+    'weight' => 15
+  );
+  $items['admin/config/mb/buttons/more-buttons-extra/reset'] = array(
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('mb_extra_reset'),
+    'access arguments' => array('administer site configuration'),
+    'type' => MENU_CALLBACK,
+    'file' => 'mb_extra.admin.inc'
+  );
+
+  return $items;
+}
+
+/**
+ * Alter the local tasks to use an destination parameter.
+ */
+function mb_extra_menu_local_tasks_alter(&$data, $router_item, $root_path) {
+  if (module_exists('overlay')) {
+    return;
+  }
+
+  global $base_url;
+
+  $module = 'mb_extra';
+
+  if ($router_item['tab_root'] == 'node/%') {
+    if (variable_get($module . '_destination_tabs', 0) == TRUE && count($data['tabs']) > 0) {
+      $destination = drupal_get_destination();
+
+      foreach (element_children($data['tabs'][0]['output']) as $key) {
+        if ($data['tabs'][0]['output'][$key]['#link']['tab_root_href'] != $destination['destination'] && !stristr($destination['destination'], $data['tabs'][0]['output'][$key]['#link']['tab_root_href'])) {
+          $params = $data['tabs'][0]['output'][$key]['#link'];
+          $data['tabs'][0]['output'][$key]['#link']['href'] = $base_url . '/' . $params['href'] . '?destination=' . $destination['destination'];
+          //$data['tabs'][0]['output'][$key]['#link']['tab_root_href'] = $base_url . '/' . $params['tab_root_href'] . '?destination=' . $destination['destination'];
+          //$data['tabs'][0]['output'][$key]['#link']['tab_parent_href'] = $base_url . '/' . $params['tab_parent_href'] . '?destination=' . $destination['destination'];
+        }
+      }
+
+      // Children tabs level 1.
+      if (isset($data['tabs'][1])) {
+        foreach (element_children($data['tabs'][1]['output']) as $key) {
+          if ($data['tabs'][1]['output'][$key]['#link']['tab_root_href'] != $destination['destination']) {
+            $params = $data['tabs'][1]['output'][$key]['#link'];
+            $data['tabs'][1]['output'][$key]['#link']['href'] = $base_url . '/' . $params['href'] . '?destination=' . $destination['destination'];
+            //$data['tabs'][0]['output'][$key]['#link']['tab_root_href'] = $base_url . '/' . $params['tab_root_href'] . '?destination=' . $destination['destination'];
+            //$data['tabs'][0]['output'][$key]['#link']['tab_parent_href'] = $base_url . '/' . $params['tab_parent_href'] . '?destination=' . $destination['destination'];
+
+            if (isset($data['tabs'][1]['output'][$key]['#active'])) {
+              $data['tabs'][1]['output'][$key]['#link']['localized_options'] = array(
+                'attributes' => array(
+                  'class' => 'active'
+                )
+              );
+            }
+          }
+        }
+      }
+    }
+  }
+}
+
+/**
+ * Implements hook_theme().
+ */
+function mb_extra_theme() {
+  return array(
+    'mb_extra_admin' => array(
+      'variables' => array('form' => NULL),
+    )
+  );
+}
+
+/**
+ * Implements hook_form_alter().
+ */
+function mb_extra_form_alter(&$form, &$form_state, $form_id) {
+  $module = 'mb_extra';
+
+  // Alter the confirm form cancel link to display the link as button.
+  if (isset($form['confirm']) && variable_get($module . '_confirm_cancel', 0) == TRUE) {
+    $form['actions']['cancel']['#attributes']['class'][] = 'button';
+  }
+}