Convert "Diff Details" tabs to PHUITabGroup

Summary:
Ref T10628. Switch this to be nicer and more modern.

  - When there's only one tab, add an option to hide it.

Test Plan:
  - Viewed normal revisions (no tabs).
  - Viewed X vs Y revisions (two tabs, rightmost tab selected by default).

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10628

Differential Revision: https://secure.phabricator.com/D16206

src/applications/differential/controller/DifferentialRevisionViewController.php

@@ -1031,28 +1031,26 @@ final class DifferentialRevisionViewController extends DifferentialController {
       );
     }
 
-    $box = id(new PHUIObjectBoxView())
-      ->setHeaderText(pht('Diff Detail'))
-      ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
-      ->setUser($viewer);
+    $tab_group = id(new PHUITabGroupView())
+      ->setHideSingleTab(true);
 
-    $last_tab = null;
     foreach ($property_lists as $key => $property_list) {
       list($tab_name, $list_view) = $property_list;
 
-      $tab = id(new PHUIListItemView())
+      $tab = id(new PHUITabView())
         ->setKey($key)
-        ->setName($tab_name);
+        ->setName($tab_name)
+        ->appendChild($list_view);
 
-      $box->addPropertyList($list_view, $tab);
-      $last_tab = $tab;
+      $tab_group->addTab($tab);
+      $tab_group->selectTab($key);
     }
 
-    if ($last_tab) {
-      $last_tab->setSelected(true);
-    }
-
-    return $box;
+    return id(new PHUIObjectBoxView())
+      ->setHeaderText(pht('Diff Detail'))
+      ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
+      ->setUser($viewer)
+      ->addTabGroup($tab_group);
   }
 
   private function buildDiffPropertyList(

src/view/phui/PHUITabGroupView.php

@@ -3,11 +3,23 @@
 final class PHUITabGroupView extends AphrontTagView {
 
   private $tabs = array();
+  private $selectedTab;
+
+  private $hideSingleTab;
 
   protected function canAppendChild() {
     return false;
   }
 
+  public function setHideSingleTab($hide_single_tab) {
+    $this->hideSingleTab = $hide_single_tab;
+    return $this;
+  }
+
+  public function getHideSingleTab() {
+    return $this->hideSingleTab;
+  }
+
   public function addTab(PHUITabView $tab) {
     $key = $tab->getKey();
     $tab->lockKey();
@@ -25,11 +37,28 @@ final class PHUITabGroupView extends AphrontTagView {
     return $this;
   }
 
-  public function getSelectedTab() {
+  public function selectTab($key) {
+    if (empty($this->tabs[$key])) {
+      throw new Exception(
+        pht(
+          'Unable to select tab ("%s") which does not exist.',
+          $key));
+    }
+
+    $this->selectedTab = $key;
+
+    return $this;
+  }
+
+  public function getSelectedTabKey() {
     if (!$this->tabs) {
       return null;
     }
 
+    if ($this->selectedTab !== null) {
+      return $this->selectedTab;
+    }
+
     return head($this->tabs)->getKey();
   }
 
@@ -51,7 +80,7 @@ final class PHUITabGroupView extends AphrontTagView {
       ->setType(PHUIListView::NAVBAR_LIST);
     $content = array();
 
-    $selected_tab = $this->getSelectedTab();
+    $selected_tab = $this->getSelectedTabKey();
     foreach ($this->tabs as $tab) {
       $item = $tab->newMenuItem();
       $tab_key = $tab->getKey();
@@ -74,6 +103,10 @@ final class PHUITabGroupView extends AphrontTagView {
         $tab);
     }
 
+    if ($this->hideSingleTab && (count($this->tabs) == 1)) {
+      $tabs = null;
+    }
+
     return array(
       $tabs,
       $content,