ajax.inc

<?php


/**
 * @file
 * Handles the server side AJAX interactions of Views.
 */

/**
 * @defgroup ajax Views AJAX library
 * @{
 * Handles the server side AJAX interactions of Views.
 */

/**
 * Menu callback to load a view via AJAX.
 */
function views_ajax() {
    if (isset($_REQUEST['view_name']) && isset($_REQUEST['view_display_id'])) {
        $name = $_REQUEST['view_name'];
        $display_id = $_REQUEST['view_display_id'];
        $args = isset($_REQUEST['view_args']) && $_REQUEST['view_args'] !== '' ? explode('/', htmlspecialchars_decode($_REQUEST['view_args'], ENT_QUOTES)) : array();
        $path = isset($_REQUEST['view_path']) ? htmlspecialchars_decode($_REQUEST['view_path'], ENT_QUOTES) : NULL;
        $dom_id = isset($_REQUEST['view_dom_id']) ? preg_replace('/[^a-zA-Z0-9_-]+/', '-', $_REQUEST['view_dom_id']) : NULL;
        $pager_element = isset($_REQUEST['pager_element']) ? intval($_REQUEST['pager_element']) : NULL;
        $commands = array();
        // Remove all of this stuff from $_GET so it doesn't end up in pagers and
        // tablesort URLs; do not modify $_POST itself but make a new "clean"
        // copy to merge it with $_GET later.
        $cleaned_post = $_POST;
        foreach (array(
            'view_name',
            'view_display_id',
            'view_args',
            'view_path',
            'view_dom_id',
            'pager_element',
            'view_base_path',
            'ajax_html_ids',
            'ajax_page_state',
        ) as $key) {
            if (isset($_GET[$key])) {
                unset($_GET[$key]);
            }
            if (isset($_REQUEST[$key])) {
                unset($_REQUEST[$key]);
            }
            if (isset($cleaned_post[$key])) {
                unset($cleaned_post[$key]);
            }
        }
        // Remove the HTML IDs passed in via AJAX.
        unset($_POST['ajax_html_ids']);
        // Load the view.
        $view = views_get_view($name);
        if ($view && $view->access($display_id) && $view->set_display($display_id) && $view->display_handler
            ->use_ajax()) {
            // Fix 'q' for paging.
            if (!empty($path)) {
                $_GET['q'] = $path;
            }
            // If page parameter is in the $_POST exclude it from $_GET, otherwise
            // support views_ajax requests using $_GET.
            $exclude = isset($_POST['page']) ? array(
                'page',
            ) : array();
            // Add all $_POST data to $_GET as many things, such as tablesorts,
            // exposed filters and paging assume $_GET.
            $_GET = $cleaned_post + drupal_get_query_parameters($_GET, $exclude);
            // Overwrite the destination.
            // @see drupal_get_destination()
            $origin_destination = $path;
            $query = drupal_http_build_query(drupal_get_query_parameters());
            if ($query != '') {
                $origin_destination .= '?' . $query;
            }
            $destination =& drupal_static('drupal_get_destination');
            $destination = array(
                'destination' => $origin_destination,
            );
            // Override the display's pager_element with the one actually used.
            if (isset($pager_element)) {
                $commands[] = views_ajax_command_scroll_top('.view-dom-id-' . $dom_id);
                $pager = $view->display[$display_id]->handler
                    ->get_option('pager');
                $pager['options']['id'] = $pager_element;
                $view->display[$display_id]->handler
                    ->set_option('pager', $pager);
            }
            // Reuse the same DOM id so it matches that in Drupal.settings.
            $view->dom_id = $dom_id;
            // Always return HTML with the same DOM ID that was sent by the browser.
            $commands[] = ajax_command_replace('.view-dom-id-' . $dom_id, preg_replace('/view-dom-id-[a-zA-Z0-9_-]+/', 'view-dom-id-' . $view->dom_id, $view->preview($display_id, $args), 1));
        }
        drupal_alter('views_ajax_data', $commands, $view);
        return array(
            '#type' => 'ajax',
            '#commands' => $commands,
        );
    }
}

/**
 * Creates a Drupal AJAX 'viewsSetForm' command.
 *
 * @param string $output
 *   The form to display in the modal.
 * @param string $title
 *   The title.
 * @param string $url
 *   An optional URL.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_set_form($output, $title, $url = NULL) {
    $command = array(
        'command' => 'viewsSetForm',
        'output' => $output,
        'title' => $title,
    );
    if (isset($url)) {
        $command['url'] = $url;
    }
    return $command;
}

/**
 * Creates a Drupal AJAX 'viewsDismissForm' command.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_dismiss_form() {
    $command = array(
        'command' => 'viewsDismissForm',
    );
    return $command;
}

/**
 * Creates a Drupal AJAX 'viewsHilite' command.
 *
 * @param string $selector
 *   The selector to highlight.
 *
 * @return
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_hilite($selector) {
    return array(
        'command' => 'viewsHilite',
        'selector' => $selector,
    );
}

/**
 * Creates a Drupal AJAX 'addTab' command.
 *
 * @param string $id
 *   The DOM ID.
 * @param string $title
 *   The title.
 * @param string $body
 *   The body.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_add_tab($id, $title, $body) {
    $command = array(
        'command' => 'viewsAddTab',
        'id' => $id,
        'title' => $title,
        'body' => $body,
    );
    return $command;
}

/**
 * Scroll to top of the current view.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_scroll_top($selector) {
    $command = array(
        'command' => 'viewsScrollTop',
        'selector' => $selector,
    );
    return $command;
}

/**
 * Shows Save and Cancel buttons.
 *
 * @param bool $changed
 *   Whether of not the view has changed.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_show_buttons($changed) {
    $command = array(
        'command' => 'viewsShowButtons',
        'changed' => (bool) $changed,
    );
    return $command;
}

/**
 * Trigger the Views live preview.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_trigger_preview() {
    $command = array(
        'command' => 'viewsTriggerPreview',
    );
    return $command;
}

/**
 * Replace the page title.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_command_replace_title($title) {
    $command = array(
        'command' => 'viewsReplaceTitle',
        'title' => $title,
        'siteName' => variable_get('site_name', 'Drupal'),
    );
    return $command;
}

/**
 * Return an AJAX error.
 *
 * @param string $message
 *   The message to display.
 *
 * @return array
 *   An array suitable for use with the ajax_render() function.
 */
function views_ajax_error($message) {
    $commands = array();
    $commands[] = views_ajax_command_set_form($message, t('Error'));
    return $commands;
}

/**
 * Wrapper around drupal_build_form to handle some AJAX stuff automatically.
 *
 * This makes some assumptions about the client.
 */
function views_ajax_form_wrapper($form_id, &$form_state) {
    ctools_include('dependent');
    // This won't override settings already in.
    $form_state += array(
        'rerender' => FALSE,
        'no_redirect' => !empty($form_state['ajax']),
        'no_cache' => TRUE,
        'build_info' => array(
            'args' => array(),
        ),
    );
    $form = drupal_build_form($form_id, $form_state);
    $output = drupal_render($form);
    // These forms have the title built in, so set the title here.
    if (empty($form_state['ajax']) && !empty($form_state['title'])) {
        drupal_set_title($form_state['title']);
        drupal_add_css(drupal_get_path('module', 'views_ui') . '/css/views-admin.css');
    }
    if (!empty($form_state['ajax']) && (empty($form_state['executed']) || !empty($form_state['rerender']))) {
        // If the form didn't execute and we're using ajax, build up a AJAX command
        // list to execute.
        $commands = array();
        $display = '';
        if ($messages = theme('status_messages')) {
            $display = '<div class="views-messages">' . $messages . '</div>';
        }
        $display .= $output;
        $title = empty($form_state['title']) ? '' : $form_state['title'];
        if (!empty($form_state['help_topic'])) {
            $module = !empty($form_state['help_module']) ? $form_state['help_module'] : 'views';
            if (module_exists('advanced_help')) {
                $title = theme('advanced_help_topic', array(
                    'module' => $module,
                    'topic' => $form_state['help_topic'],
                )) . $title;
            }
        }
        $url = empty($form_state['url']) ? url($_GET['q'], array(
            'absolute' => TRUE,
        )) : $form_state['url'];
        $commands[] = views_ajax_command_set_form($display, $title, $url);
        if (!empty($form_state['#section'])) {
            $commands[] = views_ajax_command_hilite('.' . drupal_clean_css_identifier($form_state['#section']));
        }
        return $commands;
    }
    // These forms have the title built in, so set the title here.
    if (empty($form_state['ajax']) && !empty($form_state['title'])) {
        drupal_set_title($form_state['title']);
    }
    return $output;
}

/**
 * Page callback for views user autocomplete.
 */
function views_ajax_autocomplete_user($string = '') {
    // The user enters a comma-separated list of user name. We only autocomplete
    // the last name.
    $array = drupal_explode_tags($string);
    // Fetch last name.
    $last_string = trim(array_pop($array));
    $matches = array();
    if ($last_string != '') {
        $prefix = count($array) ? implode(', ', $array) . ', ' : '';
        if (strpos('anonymous', strtolower($last_string)) !== FALSE) {
            $matches[$prefix . 'Anonymous'] = 'Anonymous';
        }
        $result = db_select('users', 'u')->fields('u', array(
            'uid',
            'name',
        ))
            ->condition('u.name', db_like($last_string) . '%', 'LIKE')
            ->range(0, 10)
            ->execute()
            ->fetchAllKeyed();
        foreach ($result as $account) {
            $n = $account;
            // Commas and quotes in terms are special cases, so encode 'em.
            if (strpos($account, ',') !== FALSE || strpos($account, '"') !== FALSE) {
                $n = '"' . str_replace('"', '""', $account) . '"';
            }
            $matches[$prefix . $n] = check_plain($account);
        }
    }
    drupal_json_output($matches);
}

/**
 * Page callback for views taxonomy autocomplete.
 *
 * @param int $vid
 *   The vocabulary id of the tags which should be returned.
 * @param string $tags_typed
 *   The typed string of the user.
 *
 * @see taxonomy_autocomplete()
 */
function views_ajax_autocomplete_taxonomy($vid, $tags_typed = '') {
    // The user enters a comma-separated list of tags. We only autocomplete the
    // last tag.
    $tags_typed = drupal_explode_tags($tags_typed);
    $tag_last = drupal_strtolower(array_pop($tags_typed));
    if ($tag_last != '') {
        $query = db_select('taxonomy_term_data', 't');
        $query->addTag('translatable');
        $query->addTag('taxonomy_term_access');
        // Do not select already entered terms.
        if (!empty($tags_typed)) {
            $query->condition('t.name', $tags_typed, 'NOT IN');
        }
        // Select rows that match by term name.
        $tags_return = $query->fields('t', array(
            'tid',
            'name',
        ))
            ->condition('t.vid', $vid)
            ->condition('t.name', '%' . db_like($tag_last) . '%', 'LIKE')
            ->range(0, 10)
            ->execute()
            ->fetchAllKeyed();
        $prefix = count($tags_typed) ? drupal_implode_tags($tags_typed) . ', ' : '';
        $term_matches = array();
        foreach ($tags_return as $name) {
            $n = $name;
            // Term names containing commas or quotes must be wrapped in quotes.
            if (strpos($name, ',') !== FALSE || strpos($name, '"') !== FALSE) {
                $n = '"' . str_replace('"', '""', $name) . '"';
            }
            // Add term name to list of matches.
            $term_matches[$prefix . $n] = check_plain($name);
        }
    }
    drupal_json_output($term_matches);
}

/**
 * @}
 */