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Diffstat (limited to 'engine/lib/navigation.php')
-rw-r--r-- | engine/lib/navigation.php | 516 |
1 files changed, 516 insertions, 0 deletions
diff --git a/engine/lib/navigation.php b/engine/lib/navigation.php new file mode 100644 index 000000000..86624cd7c --- /dev/null +++ b/engine/lib/navigation.php @@ -0,0 +1,516 @@ +<?php +/** + * Elgg navigation library + * Functions for managing menus and other navigational elements + * + * Breadcrumbs + * Elgg uses a breadcrumb stack. The page handlers (controllers in MVC terms) + * push the breadcrumb links onto the stack. @see elgg_push_breadcrumb() + * + * + * Pagination + * Automatically handled by Elgg when using elgg_list_entities* functions. + * @see elgg_list_entities() + * + * + * Tabs + * @see navigation/tabs view + * + * + * Menus + * Elgg uses a single interface to manage its menus. Menu items are added with + * {@link elgg_register_menu_item()}. This is generally used for menus that + * appear only once per page. For dynamic menus (such as the hover + * menu for user's avatar), a plugin hook is emitted when the menu is being + * created. The hook is 'register', 'menu:<menu_name>'. For more details on this, + * @see elgg_view_menu(). + * + * Menus supported by the Elgg core + * Standard menus: + * site Site navigation shown on every page. + * page Page menu usually shown in a sidebar. Uses Elgg's context. + * topbar Topbar menu shown on every page. The default has two sections. + * footer Like the topbar but in the footer. + * extras Links about content on the page. The RSS link is added to this. + * + * Dynamic menus (also called just-in-time menus): + * user_hover Avatar hover menu. The user entity is passed as a parameter. + * entity The set of links shown in the summary of an entity. + * river Links shown on river items. + * owner_block Links shown for a user or group in their owner block. + * filter The tab filter for content (all, mine, friends) + * title The buttons shown next to a content title. + * long-text The links shown above the input/longtext view. + * + * @package Elgg.Core + * @subpackage Navigation + */ + +/** + * Register an item for an Elgg menu + * + * @warning Generally you should not use this in response to the plugin hook: + * 'register', 'menu:<menu_name>'. If you do, you may end up with many incorrect + * links on a dynamic menu. + * + * @warning A menu item's name must be unique per menu. If more than one menu + * item with the same name are registered, the last menu item takes priority. + * + * @see elgg_view_menu() for the plugin hooks available for modifying a menu as + * it is being rendered. + * + * @param string $menu_name The name of the menu: site, page, userhover, + * userprofile, groupprofile, or any custom menu + * @param mixed $menu_item A ElggMenuItem object or an array of options in format: + * name => STR Menu item identifier (required) + * text => STR Menu item display text (required) + * href => STR Menu item URL (required) (false for non-links. + * @warning If you disable the href the <a> tag will + * not appear, so the link_class will not apply. If you + * put <a> tags in manually through the 'text' option + * the default CSS selector .elgg-menu-$menu > li > a + * may affect formatting. Wrap in a <span> if it does.) + * contexts => ARR Page context strings + * section => STR Menu section identifier + * title => STR Menu item tooltip + * selected => BOOL Is this menu item currently selected + * parent_name => STR Identifier of the parent menu item + * link_class => STR A class or classes for the <a> tag + * item_class => STR A class or classes for the <li> tag + * + * Additional options that the view output/url takes can be + * passed in the array. If the 'confirm' key is passed, the + * menu link uses the 'output/confirmlink' view. Custom + * options can be added by using the 'data' key with the + * value being an associative array. + * + * @return bool + * @since 1.8.0 + */ +function elgg_register_menu_item($menu_name, $menu_item) { + global $CONFIG; + + if (!isset($CONFIG->menus[$menu_name])) { + $CONFIG->menus[$menu_name] = array(); + } + + if (is_array($menu_item)) { + $item = ElggMenuItem::factory($menu_item); + if (!$item) { + elgg_log("Unable to add menu item '{$menu_item['name']}' to '$menu_name' menu", 'WARNING'); + elgg_log(print_r($menu_item, true), 'DEBUG'); + return false; + } + } else { + $item = $menu_item; + } + + $CONFIG->menus[$menu_name][] = $item; + return true; +} + +/** + * Remove an item from a menu + * + * @param string $menu_name The name of the menu + * @param string $item_name The unique identifier for this menu item + * + * @return bool + * @since 1.8.0 + */ +function elgg_unregister_menu_item($menu_name, $item_name) { + global $CONFIG; + + if (!isset($CONFIG->menus[$menu_name])) { + return false; + } + + foreach ($CONFIG->menus[$menu_name] as $index => $menu_object) { + if ($menu_object->getName() == $item_name) { + unset($CONFIG->menus[$menu_name][$index]); + return true; + } + } + + return false; +} + +/** + * Check if a menu item has been registered + * + * @param string $menu_name The name of the menu + * @param string $item_name The unique identifier for this menu item + * + * @return bool + * @since 1.8.0 + */ +function elgg_is_menu_item_registered($menu_name, $item_name) { + global $CONFIG; + + if (!isset($CONFIG->menus[$menu_name])) { + return false; + } + + foreach ($CONFIG->menus[$menu_name] as $index => $menu_object) { + if ($menu_object->getName() == $item_name) { + return true; + } + } + + return false; +} + +/** + * Convenience function for registering a button to title menu + * + * The URL must be $handler/$name/$guid where $guid is the guid of the page owner. + * The label of the button is "$handler:$name" so that must be defined in a + * language file. + * + * This is used primarily to support adding an add content button + * + * @param string $handler The handler to use or null to autodetect from context + * @param string $name Name of the button + * @return void + * @since 1.8.0 + */ +function elgg_register_title_button($handler = null, $name = 'add') { + if (elgg_is_logged_in()) { + + if (!$handler) { + $handler = elgg_get_context(); + } + + $owner = elgg_get_page_owner_entity(); + if (!$owner) { + // no owns the page so this is probably an all site list page + $owner = elgg_get_logged_in_user_entity(); + } + if ($owner && $owner->canWriteToContainer()) { + $guid = $owner->getGUID(); + elgg_register_menu_item('title', array( + 'name' => $name, + 'href' => "$handler/$name/$guid", + 'text' => elgg_echo("$handler:$name"), + 'link_class' => 'elgg-button elgg-button-action', + )); + } + } +} + +/** + * Adds a breadcrumb to the breadcrumbs stack. + * + * @param string $title The title to display + * @param string $link Optional. The link for the title. + * + * @return void + * @since 1.8.0 + * + * @link http://docs.elgg.org/Tutorials/UI/Breadcrumbs + */ +function elgg_push_breadcrumb($title, $link = NULL) { + global $CONFIG; + if (!isset($CONFIG->breadcrumbs)) { + $CONFIG->breadcrumbs = array(); + } + + // avoid key collisions. + $CONFIG->breadcrumbs[] = array('title' => $title, 'link' => $link); +} + +/** + * Removes last breadcrumb entry. + * + * @return array popped item. + * @since 1.8.0 + * @link http://docs.elgg.org/Tutorials/UI/Breadcrumbs + */ +function elgg_pop_breadcrumb() { + global $CONFIG; + + if (is_array($CONFIG->breadcrumbs)) { + return array_pop($CONFIG->breadcrumbs); + } + + return FALSE; +} + +/** + * Returns all breadcrumbs as an array of array('title' => 'Readable Title', 'link' => 'URL') + * + * @return array Breadcrumbs + * @since 1.8.0 + * @link http://docs.elgg.org/Tutorials/UI/Breadcrumbs + */ +function elgg_get_breadcrumbs() { + global $CONFIG; + + if (isset($CONFIG->breadcrumbs) && is_array($CONFIG->breadcrumbs)) { + return $CONFIG->breadcrumbs; + } + + return array(); +} + +/** + * Set up the site menu + * + * Handles default, featured, and custom menu items + * + * @param string $hook + * @param string $type + * @param array $return Menu array + * @param array $params + * @return array + * @access private + */ +function elgg_site_menu_setup($hook, $type, $return, $params) { + + $featured_menu_names = elgg_get_config('site_featured_menu_names'); + $custom_menu_items = elgg_get_config('site_custom_menu_items'); + if ($featured_menu_names || $custom_menu_items) { + // we have featured or custom menu items + + $registered = $return['default']; + + // set up featured menu items + $featured = array(); + foreach ($featured_menu_names as $name) { + foreach ($registered as $index => $item) { + if ($item->getName() == $name) { + $featured[] = $item; + unset($registered[$index]); + } + } + } + + // add custom menu items + $n = 1; + foreach ($custom_menu_items as $title => $url) { + $item = new ElggMenuItem("custom$n", $title, $url); + $featured[] = $item; + $n++; + } + + $return['default'] = $featured; + if (count($registered) > 0) { + $return['more'] = $registered; + } + } else { + // no featured menu items set + $max_display_items = 5; + + // the first n are shown, rest added to more list + // if only one item on more menu, stick it with the rest + $num_menu_items = count($return['default']); + if ($num_menu_items > ($max_display_items + 1)) { + $return['more'] = array_splice($return['default'], $max_display_items); + } + } + + // check if we have anything selected + $selected = false; + foreach ($return as $section_name => $section) { + foreach ($section as $key => $item) { + if ($item->getSelected()) { + $selected = true; + break 2; + } + } + } + + if (!$selected) { + // nothing selected, match name to context + foreach ($return as $section_name => $section) { + foreach ($section as $key => $item) { + // only highlight internal links + if (strpos($item->getHref(), elgg_get_site_url()) === 0) { + if ($item->getName() == elgg_get_context()) { + $return[$section_name][$key]->setSelected(true); + break 2; + } + } + } + } + } + + return $return; +} + +/** + * Add the comment and like links to river actions menu + * @access private + */ +function elgg_river_menu_setup($hook, $type, $return, $params) { + if (elgg_is_logged_in()) { + $item = $params['item']; + $object = $item->getObjectEntity(); + // comments and non-objects cannot be commented on or liked + if (!elgg_in_context('widgets') && $item->annotation_id == 0) { + // comments + if ($object->canComment()) { + $options = array( + 'name' => 'comment', + 'href' => "#comments-add-$object->guid", + 'text' => elgg_view_icon('speech-bubble'), + 'title' => elgg_echo('comment:this'), + 'rel' => 'toggle', + 'priority' => 50, + ); + $return[] = ElggMenuItem::factory($options); + } + } + + if (elgg_is_admin_logged_in()) { + $options = array( + 'name' => 'delete', + 'href' => elgg_add_action_tokens_to_url("action/river/delete?id=$item->id"), + 'text' => elgg_view_icon('delete'), + 'title' => elgg_echo('delete'), + 'confirm' => elgg_echo('deleteconfirm'), + 'priority' => 200, + ); + $return[] = ElggMenuItem::factory($options); + } + } + + return $return; +} + +/** + * Entity menu is list of links and info on any entity + * @access private + */ +function elgg_entity_menu_setup($hook, $type, $return, $params) { + if (elgg_in_context('widgets')) { + return $return; + } + + $entity = $params['entity']; + $handler = elgg_extract('handler', $params, false); + + // access + $access = elgg_view('output/access', array('entity' => $entity)); + $options = array( + 'name' => 'access', + 'text' => $access, + 'href' => false, + 'priority' => 100, + ); + $return[] = ElggMenuItem::factory($options); + + if ($entity->canEdit() && $handler) { + // edit link + $options = array( + 'name' => 'edit', + 'text' => elgg_echo('edit'), + 'title' => elgg_echo('edit:this'), + 'href' => "$handler/edit/{$entity->getGUID()}", + 'priority' => 200, + ); + $return[] = ElggMenuItem::factory($options); + + // delete link + $options = array( + 'name' => 'delete', + 'text' => elgg_view_icon('delete'), + 'title' => elgg_echo('delete:this'), + 'href' => "action/$handler/delete?guid={$entity->getGUID()}", + 'confirm' => elgg_echo('deleteconfirm'), + 'priority' => 300, + ); + $return[] = ElggMenuItem::factory($options); + } + + return $return; +} + +/** + * Widget menu is a set of widget controls + * @access private + */ +function elgg_widget_menu_setup($hook, $type, $return, $params) { + + $widget = $params['entity']; + $show_edit = elgg_extract('show_edit', $params, true); + + $collapse = array( + 'name' => 'collapse', + 'text' => ' ', + 'href' => "#elgg-widget-content-$widget->guid", + 'class' => 'elgg-widget-collapse-button', + 'rel' => 'toggle', + 'priority' => 1 + ); + $return[] = ElggMenuItem::factory($collapse); + + if ($widget->canEdit()) { + $delete = array( + 'name' => 'delete', + 'text' => elgg_view_icon('delete-alt'), + 'title' => elgg_echo('widget:delete', array($widget->getTitle())), + 'href' => "action/widgets/delete?widget_guid=$widget->guid", + 'is_action' => true, + 'class' => 'elgg-widget-delete-button', + 'id' => "elgg-widget-delete-button-$widget->guid", + 'priority' => 900 + ); + $return[] = ElggMenuItem::factory($delete); + + if ($show_edit) { + $edit = array( + 'name' => 'settings', + 'text' => elgg_view_icon('settings-alt'), + 'title' => elgg_echo('widget:edit'), + 'href' => "#widget-edit-$widget->guid", + 'class' => "elgg-widget-edit-button", + 'rel' => 'toggle', + 'priority' => 800, + ); + $return[] = ElggMenuItem::factory($edit); + } + } + + return $return; +} + +/** + * Adds a delete link to "generic_comment" annotations + * @access private + */ +function elgg_annotation_menu_setup($hook, $type, $return, $params) { + $annotation = $params['annotation']; + + if ($annotation->name == 'generic_comment' && $annotation->canEdit()) { + $url = elgg_http_add_url_query_elements('action/comments/delete', array( + 'annotation_id' => $annotation->id, + )); + + $options = array( + 'name' => 'delete', + 'href' => $url, + 'text' => "<span class=\"elgg-icon elgg-icon-delete\"></span>", + 'confirm' => elgg_echo('deleteconfirm'), + 'encode_text' => false + ); + $return[] = ElggMenuItem::factory($options); + } + + return $return; +} + + +/** + * Navigation initialization + * @access private + */ +function elgg_nav_init() { + elgg_register_plugin_hook_handler('prepare', 'menu:site', 'elgg_site_menu_setup'); + elgg_register_plugin_hook_handler('register', 'menu:river', 'elgg_river_menu_setup'); + elgg_register_plugin_hook_handler('register', 'menu:entity', 'elgg_entity_menu_setup'); + elgg_register_plugin_hook_handler('register', 'menu:widget', 'elgg_widget_menu_setup'); + elgg_register_plugin_hook_handler('register', 'menu:annotation', 'elgg_annotation_menu_setup'); +} + +elgg_register_event_handler('init', 'system', 'elgg_nav_init'); |