Make mobile navigation work properly by default in more cases

Summary:
Fixes T5752. This obsoletes a bunch of old patterns and I'll follow up on those with a big "go do a bunch of mechanical code changes" task. Major goals are:

- Don't load named queries multiple times on search pages.
- Don't require extra code to get standard navigation right on mobile.
- Reduce the amount of boilerplate in ListControllers.
- Reduce the amount of boilerplate around navigation/menus in all controllers.

Specifically, here's what this does:

- The StandardPage is now a smarter/more structured object with `setNavigation()` and `setCrumbs()` methods. More rendering decisions are delayed until the last possible moment.
- It uses this to automatically add crumb actions to the application menu.
- It uses this to automatically reuse one SearchEngine instead of running queries multiple times.
- The new preferred way to build responses is `$this->newPage()` (like `$this->newDialog()`), which has structured methods for adding stuff (`setTitle()`, etc).
- SearchEngine exposes a new convenience method so you don't have to do all the controller delegation stuff.
- Building menus is generally simpler.

Test Plan:
- Tested paste list, view, edit, comment, raw controllers for functionality, mobile menu, crumbs, navigation menu.
- Edited saved queries.
- Tested Differential, Maniphest (no changes).
- Verified the paste pages don't run any duplicate NamedQuery queries.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T5752

Differential Revision: https://secure.phabricator.com/D14382

src/__phutil_library_map__.php

···
     'PHUI' => 'view/phui/PHUI.php',
     'PHUIActionPanelExample' => 'applications/uiexample/examples/PHUIActionPanelExample.php',
     'PHUIActionPanelView' => 'view/phui/PHUIActionPanelView.php',
+    'PHUIApplicationMenuView' => 'view/layout/PHUIApplicationMenuView.php',
     'PHUIBadgeBoxView' => 'view/phui/PHUIBadgeBoxView.php',
     'PHUIBadgeExample' => 'applications/uiexample/examples/PHUIBadgeExample.php',
     'PHUIBadgeMiniView' => 'view/phui/PHUIBadgeMiniView.php',
···
     'PHUI' => 'Phobject',
     'PHUIActionPanelExample' => 'PhabricatorUIExample',
     'PHUIActionPanelView' => 'AphrontTagView',
+    'PHUIApplicationMenuView' => 'Phobject',
     'PHUIBadgeBoxView' => 'AphrontTagView',
     'PHUIBadgeExample' => 'PhabricatorUIExample',
     'PHUIBadgeMiniView' => 'AphrontTagView',
···
     'PhabricatorStandardCustomFieldText' => 'PhabricatorStandardCustomField',
     'PhabricatorStandardCustomFieldTokenizer' => 'PhabricatorStandardCustomFieldPHIDs',
     'PhabricatorStandardCustomFieldUsers' => 'PhabricatorStandardCustomFieldTokenizer',
-    'PhabricatorStandardPageView' => 'PhabricatorBarePageView',
+    'PhabricatorStandardPageView' => array(
+      'PhabricatorBarePageView',
+      'AphrontResponseProducerInterface',
+    ),
     'PhabricatorStandardSelectCustomFieldDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorStatusController' => 'PhabricatorController',
     'PhabricatorStatusUIExample' => 'PhabricatorUIExample',

src/applications/base/controller/PhabricatorController.php

···
 abstract class PhabricatorController extends AphrontController {
 
   private $handles;
-  private $extraQuicksandConfig = array();
 
   public function shouldRequireLogin() {
     return true;
···
 
   public function isGlobalDragAndDropUploadEnabled() {
     return false;
-  }
-
-  public function addExtraQuicksandConfig($config) {
-    $this->extraQuicksandConfig += $config;
-    return $this;
-  }
-
-  private function getExtraQuicksandConfig() {
-    return $this->extraQuicksandConfig;
   }
 
   public function willBeginExecution() {
···
     }
   }
 
-  public function buildStandardPageView() {
-    $view = new PhabricatorStandardPageView();
-    $view->setRequest($this->getRequest());
-    $view->setController($this);
-    return $view;
-  }
-
-  public function buildStandardPageResponse($view, array $data) {
-    $page = $this->buildStandardPageView();
-    $page->appendChild($view);
-    return $this->buildPageResponse($page);
-  }
-
-  private function buildPageResponse($page) {
-    if ($this->getRequest()->isQuicksand()) {
-      $response = id(new AphrontAjaxResponse())
-        ->setContent($page->renderForQuicksand(
-          $this->getExtraQuicksandConfig()));
-    } else {
-      $response = id(new AphrontWebpageResponse())
-        ->setContent($page->render());
-    }
-
-    return $response;
-  }
-
   public function getApplicationURI($path = '') {
     if (!$this->getCurrentApplication()) {
       throw new Exception(pht('No application!'));
···
     return $this->getCurrentApplication()->getApplicationURI($path);
   }
 
-  public function buildApplicationPage($view, array $options) {
-    $page = $this->buildStandardPageView();
-
-    $title = PhabricatorEnv::getEnvConfig('phabricator.serious-business') ?
-      'Phabricator' :
-      pht('Bacon Ice Cream for Breakfast');
-
-    $application = $this->getCurrentApplication();
-    $page->setTitle(idx($options, 'title', $title));
-    if ($application) {
-      $page->setApplicationName($application->getName());
-      if ($application->getTitleGlyph()) {
-        $page->setGlyph($application->getTitleGlyph());
-      }
-    }
-
-    if (idx($options, 'class')) {
-      $page->addClass($options['class']);
-    }
-
-    if (!($view instanceof AphrontSideNavFilterView)) {
-      $nav = new AphrontSideNavFilterView();
-      $nav->appendChild($view);
-      $view = $nav;
-    }
-
-    $user = $this->getRequest()->getUser();
-    $view->setUser($user);
-
-    $page->appendChild($view);
-
-    $object_phids = idx($options, 'pageObjects', array());
-    if ($object_phids) {
-      $page->appendPageObjects($object_phids);
-      foreach ($object_phids as $object_phid) {
-        PhabricatorFeedStoryNotification::updateObjectNotificationViews(
-          $user,
-          $object_phid);
-      }
-    }
-
-    if (idx($options, 'device', true)) {
-      $page->setDeviceReady(true);
-    }
-
-    $page->setShowFooter(idx($options, 'showFooter', true));
-    $page->setShowChrome(idx($options, 'chrome', true));
-
-    $application_menu = $this->buildApplicationMenu();
-    if ($application_menu) {
-      $page->setApplicationMenu($application_menu);
-    }
-
-    return $this->buildPageResponse($page);
-  }
-
   public function willSendResponse(AphrontResponse $response) {
     $request = $this->getRequest();
 
···
       ->setSubmitURI($submit_uri);
   }
 
+  public function newPage() {
+    $page = id(new PhabricatorStandardPageView())
+      ->setRequest($this->getRequest())
+      ->setController($this);
+
+    $application = $this->getCurrentApplication();
+    if ($application) {
+      $page->setApplicationName($application->getName());
+      if ($application->getTitleGlyph()) {
+        $page->setGlyph($application->getTitleGlyph());
+      }
+    }
+
+    $viewer = $this->getRequest()->getUser();
+    if ($viewer) {
+      $page->setUser($viewer);
+    }
+
+    // TODO: Remove after removing callsites to addExtraQuicksandConfig().
+    $page->addQuicksandConfig($this->extraQuicksandConfig);
+
+    return $page;
+  }
+
+  public function newApplicationMenu() {
+    return id(new PHUIApplicationMenuView())
+      ->setViewer($this->getRequest()->getUser());
+  }
+
   protected function buildTransactionTimeline(
     PhabricatorApplicationTransactionInterface $object,
     PhabricatorApplicationTransactionQuery $query,
···
     $object->willRenderTimeline($timeline, $this->getRequest());
 
     return $timeline;
+  }
+
+
+/* -(  Deprecated  )--------------------------------------------------------- */
+
+
+  /**
+   * DEPRECATED.
+   */
+  private $extraQuicksandConfig = array();
+
+
+  /**
+   * DEPRECATED. Use @{method:newPage} and call addQuicksandConfig().
+   */
+  public function addExtraQuicksandConfig($config) {
+    // TODO: When this method is removed,
+    $this->extraQuicksandConfig += $config;
+    return $this;
+  }
+
+
+  /**
+   * DEPRECATED. Use @{method:newPage}.
+   */
+  public function buildStandardPageView() {
+    return $this->newPage();
+  }
+
+
+  /**
+   * DEPRECATED. Use @{method:newPage}.
+   */
+  public function buildStandardPageResponse($view, array $data) {
+    $page = $this->buildStandardPageView();
+    $page->appendChild($view);
+    return $page->produceAphrontResponse();
+  }
+
+
+  /**
+   * DEPRECATED. Use @{method:newPage}.
+   */
+  public function buildApplicationPage($view, array $options) {
+    $page = $this->newPage();
+
+    $title = PhabricatorEnv::getEnvConfig('phabricator.serious-business') ?
+      'Phabricator' :
+      pht('Bacon Ice Cream for Breakfast');
+
+    $page->setTitle(idx($options, 'title', $title));
+
+    if (idx($options, 'class')) {
+      $page->addClass($options['class']);
+    }
+
+    if (!($view instanceof AphrontSideNavFilterView)) {
+      $nav = new AphrontSideNavFilterView();
+      $nav->appendChild($view);
+      $view = $nav;
+    }
+
+    $page->appendChild($view);
+
+    $object_phids = idx($options, 'pageObjects', array());
+    if ($object_phids) {
+      $page->setPageObjectPHIDs($object_phids);
+    }
+
+    if (idx($options, 'device', true)) {
+      $page->setDeviceReady(true);
+    }
+
+    $page->setShowFooter(idx($options, 'showFooter', true));
+    $page->setShowChrome(idx($options, 'chrome', true));
+
+    return $page->produceAphrontResponse();
   }
 
 }

src/applications/paste/controller/PhabricatorPasteController.php

···
 
 abstract class PhabricatorPasteController extends PhabricatorController {
 
-  public function buildSideNavView($for_app = false) {
-    $user = $this->getRequest()->getUser();
-
-    $nav = new AphrontSideNavFilterView();
-    $nav->setBaseURI(new PhutilURI($this->getApplicationURI()));
-
-    if ($for_app) {
-      $nav->addFilter('create', pht('Create Paste'));
-    }
-
-    id(new PhabricatorPasteSearchEngine())
-      ->setViewer($user)
-      ->addNavigationItems($nav->getMenu());
-
-    $nav->selectFilter(null);
-
-    return $nav;
-  }
-
   public function buildApplicationMenu() {
-    return $this->buildSideNavView(true)->getMenu();
-  }
-
-  protected function buildApplicationCrumbs() {
-    $crumbs = parent::buildApplicationCrumbs();
-
-    $crumbs->addAction(
-      id(new PHUIListItemView())
-        ->setName(pht('Create Paste'))
-        ->setHref($this->getApplicationURI('create/'))
-        ->setIcon('fa-plus-square'));
-
-    return $crumbs;
+    return $this->newApplicationMenu()
+      ->setSearchEngine(new PhabricatorPasteSearchEngine());
   }
 
   public function buildSourceCodeView(

src/applications/paste/controller/PhabricatorPasteEditController.php

···
       $form_box->setValidationException($validation_exception);
     }
 
-    $crumbs = $this->buildApplicationCrumbs($this->buildSideNavView());
+    $crumbs = $this->buildApplicationCrumbs();
     if (!$is_create) {
       $crumbs->addTextCrumb('P'.$paste->getID(), '/P'.$paste->getID());
     }

src/applications/paste/controller/PhabricatorPasteListController.php

···
   }
 
   public function handleRequest(AphrontRequest $request) {
-    $querykey = $request->getURIData('queryKey');
+    return id(new PhabricatorPasteSearchEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
 
-    $controller = id(new PhabricatorApplicationSearchController())
-      ->setQueryKey($querykey)
-      ->setSearchEngine(new PhabricatorPasteSearchEngine())
-      ->setNavigation($this->buildSideNavView());
+  protected function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
 
-    return $this->delegateToController($controller);
-  }
+    $crumbs->addAction(
+      id(new PHUIListItemView())
+        ->setName(pht('Create Paste'))
+        ->setHref($this->getApplicationURI('create/'))
+        ->setIcon('fa-plus-square'));
 
+    return $crumbs;
+  }
 
 }

src/applications/paste/controller/PhabricatorPasteViewController.php

···
       ),
       $source_code);
 
-    $crumbs = $this->buildApplicationCrumbs($this->buildSideNavView())
+    $crumbs = $this->buildApplicationCrumbs()
       ->addTextCrumb('P'.$paste->getID(), '/P'.$paste->getID());
 
     $timeline = $this->buildTransactionTimeline(
···
       ->setAction($this->getApplicationURI('/comment/'.$paste->getID().'/'))
       ->setSubmitButtonName(pht('Add Comment'));
 
-    return $this->buildApplicationPage(
-      array(
-        $crumbs,
-        $object_box,
-        $source_code,
-        $timeline,
-        $add_comment_form,
-      ),
-      array(
-        'title' => $paste->getFullName(),
-        'pageObjects' => array($paste->getPHID()),
-      ));
+    return $this->newPage()
+      ->setTitle($paste->getFullName())
+      ->setCrumbs($crumbs)
+      ->setPageObjectPHIDs(
+        array(
+          $paste->getPHID(),
+        ))
+      ->appendChild(
+        array(
+          $object_box,
+          $source_code,
+          $timeline,
+          $add_comment_form,
+        ));
   }
 
   private function buildHeaderView(PhabricatorPaste $paste) {

src/applications/search/controller/PhabricatorApplicationSearchController.php

···
       throw new PhutilInvalidStateException('setEngine');
     }
 
-    $nav = $this->getNavigation();
-    if (!$nav) {
-      throw new PhutilInvalidStateException('setNavigation');
-    }
-
     $engine->setViewer($this->getRequest()->getUser());
 
     $parent = $this->getDelegatingController();
···
     $user = $request->getUser();
     $engine = $this->getSearchEngine();
     $nav = $this->getNavigation();
+    if (!$nav) {
+      $nav = $this->buildNavigation();
+    }
 
     if ($request->isFormPost()) {
       $saved_query = $engine->buildSavedQueryFromRequest($request);
···
     // we sort out T5307.
 
     $form->appendChild($submit);
+    $body = array();
 
     if ($this->getPreface()) {
-      $nav->appendChild($this->getPreface());
+      $body[] = $this->getPreface();
     }
 
     if ($named_query) {
···
       $box->setForm($form);
     }
 
-    $nav->appendChild($box);
+    $body[] = $box;
 
     if ($run_query) {
       $box->setAnchor(
···
             ->addMargin(PHUI::MARGIN_LARGE)
             ->setBorder(true)
             ->appendChild($pager);
-          $nav->appendChild($pager_box);
+          $body[] = $pager_box;
         }
 
       } catch (PhabricatorTypeaheadInvalidTokenException $ex) {
···
       ->buildApplicationCrumbs()
       ->addTextCrumb($title);
 
-    $nav->setCrumbs($crumbs);
-
-    return $this->buildApplicationPage(
-      $nav,
-      array(
-        'title' => pht('Query: %s', $title),
-      ));
+    return $this->newPage()
+      ->setApplicationMenu($this->buildApplicationMenu())
+      ->setTitle(pht('Query: %s', $title))
+      ->setCrumbs($crumbs)
+      ->setNavigation($nav)
+      ->appendChild($body);
   }
 
   private function processEditRequest() {
···
     $request = $this->getRequest();
     $user = $request->getUser();
     $engine = $this->getSearchEngine();
+
     $nav = $this->getNavigation();
+    if (!$nav) {
+      $nav = $this->buildNavigation();
+    }
 
     $named_queries = $engine->loadAllNamedQueries();
 
···
       ->addTextCrumb(pht('Saved Queries'), $engine->getQueryManagementURI());
 
     $nav->selectFilter('query/edit');
-    $nav->setCrumbs($crumbs);
 
     $box = id(new PHUIObjectBoxView())
       ->setHeaderText(pht('Saved Queries'))
       ->setObjectList($list);
 
-    $nav->appendChild($box);
-
-    return $parent->buildApplicationPage(
-      $nav,
-      array(
-        'title' => pht('Saved Queries'),
-      ));
+    return $this->newPage()
+      ->setApplicationMenu($this->buildApplicationMenu())
+      ->setTitle(pht('Saved Queries'))
+      ->setCrumbs($crumbs)
+      ->setNavigation($nav)
+      ->appendChild($box);
   }
 
   public function buildApplicationMenu() {
-    return $this->getDelegatingController()->buildApplicationMenu();
+    $menu = $this->getDelegatingController()
+      ->buildApplicationMenu();
+
+    if ($menu instanceof PHUIApplicationMenuView) {
+      $menu->setSearchEngine($this->getSearchEngine());
+    }
+
+    return $menu;
+  }
+
+  private function buildNavigation() {
+    $viewer = $this->getViewer();
+    $engine = $this->getSearchEngine();
+
+    $nav = id(new AphrontSideNavFilterView())
+      ->setUser($viewer)
+      ->setBaseURI(new PhutilURI($this->getApplicationURI()));
+
+    $engine->addNavigationItems($nav->getMenu());
+
+    return $nav;
   }
 
 }

src/applications/search/engine/PhabricatorApplicationSearchEngine.php

···
   private $customFields = false;
   private $request;
   private $context;
+  private $controller;
+  private $namedQueries;
 
   const CONTEXT_LIST  = 'list';
   const CONTEXT_PANEL = 'panel';
+
+  public function setController(PhabricatorController $controller) {
+    $this->controller = $controller;
+    return $this;
+  }
+
+  public function getController() {
+    return $this->controller;
+  }
+
+  public function buildResponse() {
+    $controller = $this->getController();
+    $request = $controller->getRequest();
+
+    $search = id(new PhabricatorApplicationSearchController())
+      ->setQueryKey($request->getURIData('queryKey'))
+      ->setSearchEngine($this);
+
+    return $controller->delegateToController($search);
+  }
 
   public function newResultObject() {
     // We may be able to get this automatically if newQuery() is implemented.
···
 
   public function loadAllNamedQueries() {
     $viewer = $this->requireViewer();
+    $builtin = $this->getBuiltinQueries($viewer);
 
-    $named_queries = id(new PhabricatorNamedQueryQuery())
-      ->setViewer($viewer)
-      ->withUserPHIDs(array($viewer->getPHID()))
-      ->withEngineClassNames(array(get_class($this)))
-      ->execute();
-    $named_queries = mpull($named_queries, null, 'getQueryKey');
+    if ($this->namedQueries === null) {
+      $named_queries = id(new PhabricatorNamedQueryQuery())
+        ->setViewer($viewer)
+        ->withUserPHIDs(array($viewer->getPHID()))
+        ->withEngineClassNames(array(get_class($this)))
+        ->execute();
+      $named_queries = mpull($named_queries, null, 'getQueryKey');
 
-    $builtin = $this->getBuiltinQueries($viewer);
-    $builtin = mpull($builtin, null, 'getQueryKey');
+      $builtin = mpull($builtin, null, 'getQueryKey');
 
-    foreach ($named_queries as $key => $named_query) {
-      if ($named_query->getIsBuiltin()) {
-        if (isset($builtin[$key])) {
-          $named_queries[$key]->setQueryName($builtin[$key]->getQueryName());
-          unset($builtin[$key]);
-        } else {
-          unset($named_queries[$key]);
+      foreach ($named_queries as $key => $named_query) {
+        if ($named_query->getIsBuiltin()) {
+          if (isset($builtin[$key])) {
+            $named_queries[$key]->setQueryName($builtin[$key]->getQueryName());
+            unset($builtin[$key]);
+          } else {
+            unset($named_queries[$key]);
+          }
         }
+
+        unset($builtin[$key]);
       }
 
-      unset($builtin[$key]);
+      $named_queries = msort($named_queries, 'getSortKey');
+      $this->namedQueries = $named_queries;
     }
 
-    $named_queries = msort($named_queries, 'getSortKey');
-
-    return $named_queries + $builtin;
+    return $this->namedQueries + $builtin;
   }
 
   public function loadEnabledNamedQueries() {

src/view/layout/PHUIApplicationMenuView.php

···
+<?php
+
+final class PHUIApplicationMenuView extends Phobject {
+
+  private $viewer;
+  private $crumbs;
+  private $searchEngine;
+
+  private $items = array();
+
+  public function setViewer(PhabricatorUser $viewer) {
+    $this->viewer = $viewer;
+    return $this;
+  }
+
+  public function getViewer() {
+    return $this->viewer;
+  }
+
+  public function addLabel($name) {
+    $item = id(new PHUIListItemView())
+      ->setName($name);
+
+    return $this->addItem($item);
+  }
+
+  public function addLink($name, $href) {
+    $item = id(new PHUIListItemView())
+      ->setName($name)
+      ->setHref($href);
+
+    return $this->addItem($item);
+  }
+
+  public function addItem(PHUIListItemView $item) {
+    $this->items[] = $item;
+    return $this;
+  }
+
+  public function setSearchEngine(PhabricatorApplicationSearchEngine $engine) {
+    $this->searchEngine = $engine;
+    return $this;
+  }
+
+  public function getSearchEngine() {
+    return $this->searchEngine;
+  }
+
+  public function setCrumbs(PHUICrumbsView $crumbs) {
+    $this->crumbs = $crumbs;
+    return $this;
+  }
+
+  public function getCrumbs() {
+    return $this->crumbs;
+  }
+
+  public function buildListView() {
+    $viewer = $this->getViewer();
+
+    $view = id(new PHUIListView())
+      ->setUser($viewer);
+
+    $crumbs = $this->getCrumbs();
+    if ($crumbs) {
+      $actions = $crumbs->getActions();
+      if ($actions) {
+        $view->newLabel(pht('Create'));
+        foreach ($crumbs->getActions() as $action) {
+          $view->addMenuItem($action);
+        }
+      }
+    }
+
+    $engine = $this->getSearchEngine();
+    if ($engine) {
+      $engine
+        ->setViewer($viewer)
+        ->addNavigationItems($view);
+    }
+
+    foreach ($this->items as $item) {
+      $view->addMenuItem($item);
+    }
+
+    return $view;
+  }
+
+}

src/view/page/PhabricatorStandardPageView.php

···
  * This is a standard Phabricator page with menus, Javelin, DarkConsole, and
  * basic styles.
  */
-final class PhabricatorStandardPageView extends PhabricatorBarePageView {
+final class PhabricatorStandardPageView extends PhabricatorBarePageView
+  implements AphrontResponseProducerInterface {
 
   private $baseURI;
   private $applicationName;
···
   private $applicationMenu;
   private $showFooter = true;
   private $showDurableColumn = true;
+  private $quicksandConfig = array();
+  private $crumbs;
+  private $navigation;
 
   public function setShowFooter($show_footer) {
     $this->showFooter = $show_footer;
···
     return $this->showFooter;
   }
 
-  public function setApplicationMenu(PHUIListView $application_menu) {
+  public function setApplicationMenu($application_menu) {
+    // NOTE: For now, this can either be a PHUIListView or a
+    // PHUIApplicationMenuView.
+
     $this->applicationMenu = $application_menu;
     return $this;
   }
···
     return $this;
   }
 
-  public function appendPageObjects(array $objs) {
-    foreach ($objs as $obj) {
-      $this->pageObjects[] = $obj;
-    }
+  public function setPageObjectPHIDs(array $phids) {
+    $this->pageObjects = $phids;
+    return $this;
   }
 
   public function setShowDurableColumn($show) {
···
     return (bool)$this->getUserPreference($column_key, 0);
   }
 
+  public function addQuicksandConfig(array $config) {
+    $this->quicksandConfig = $config + $this->quicksandConfig;
+    return $this;
+  }
+
+  public function getQuicksandConfig() {
+    return $this->quicksandConfig;
+  }
+
+  public function setCrumbs(PHUICrumbsView $crumbs) {
+    $this->crumbs = $crumbs;
+    return $this;
+  }
+
+  public function getCrumbs() {
+    return $this->crumbs;
+  }
+
+  public function setNavigation(AphrontSideNavFilterView $navigation) {
+    $this->navigation = $navigation;
+    return $this;
+  }
+
+  public function getNavigation() {
+    return $this->navigation;
+  }
 
   public function getTitle() {
     $glyph_key = PhabricatorUserPreferences::PREFERENCE_TITLES;
···
       $menu->setController($this->getController());
     }
 
-    if ($this->getApplicationMenu()) {
-      $menu->setApplicationMenu($this->getApplicationMenu());
+    $application_menu = $this->getApplicationMenu();
+    if ($application_menu) {
+      if ($application_menu instanceof PHUIApplicationMenuView) {
+        $crumbs = $this->getCrumbs();
+        if ($crumbs) {
+          $application_menu->setCrumbs($crumbs);
+        }
+
+        $application_menu = $application_menu->buildListView();
+      }
+
+      $menu->setApplicationMenu($application_menu);
     }
 
     $this->menuContent = $menu->render();
···
   private function renderPageBodyContent() {
     $console = $this->getConsole();
 
+    $body = parent::getBody();
+
+    $nav = $this->getNavigation();
+    if ($nav) {
+      $crumbs = $this->getCrumbs();
+      if ($crumbs) {
+        $nav->setCrumbs($crumbs);
+      }
+      $nav->appendChild($body);
+      $body = phutil_implode_html('', array($nav->render()));
+    } else {
+      $crumbs = $this->getCrumbs();
+      if ($crumbs) {
+        $body = phutil_implode_html('', array($crumbs, $body));
+      }
+    }
+
     return array(
       ($console ? hsprintf('<darkconsole />') : null),
-      parent::getBody(),
+      $body,
       $this->renderFooter(),
     );
   }
···
       $foot);
   }
 
-  public function renderForQuicksand(array $extra_config) {
+  public function renderForQuicksand() {
     parent::willRenderPage();
     $response = $this->renderPageBodyContent();
     $response = $this->willSendResponse($response);
+
+    $extra_config = $this->getQuicksandConfig();
 
     return array(
       'content' => hsprintf('%s', $response),
···
     }
 
     return $user->loadPreferences()->getPreference($key, $default);
+  }
+
+  public function produceAphrontResponse() {
+    $controller = $this->getController();
+
+    if (!$this->getApplicationMenu()) {
+      $application_menu = $controller->buildApplicationMenu();
+      if ($application_menu) {
+        $this->setApplicationMenu($application_menu);
+      }
+    }
+
+    $viewer = $this->getUser();
+    if ($viewer && $viewer->getPHID()) {
+      $object_phids = $this->pageObjects;
+      foreach ($object_phids as $object_phid) {
+        PhabricatorFeedStoryNotification::updateObjectNotificationViews(
+          $viewer,
+          $object_phid);
+      }
+    }
+
+    if ($this->getRequest()->isQuicksand()) {
+      $content = $this->renderForQuicksand();
+      $response = id(new AphrontAjaxResponse())
+        ->setContent($content);
+    } else {
+      $content = $this->render();
+      $response = id(new AphrontWebpageResponse())
+        ->setContent($content);
+    }
+
+    return $response;
   }
 
 }

src/view/phui/PHUICrumbsView.php

···
     return $this;
   }
 
+  public function getActions() {
+    return $this->actions;
+  }
+
   public function render() {
     require_celerity_resource('phui-crumbs-view-css');