Apply SilverStripe\Admin namespace

_config.php

@@ -1,5 +1,7 @@
 <?php
 
+use SilverStripe\Admin\CMSMenu;
+
 /**
  * - CMS_DIR: Path relative to webroot, e.g. "cms"
  * - CMS_PATH: Absolute filepath, e.g. "/var/www/my-webroot/cms"

code/BatchActions/CMSBatchActions.php

@@ -7,7 +7,8 @@ use SilverStripe\ORM\SS_List;
 use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\Versioning\Versioned;
 use SilverStripe\Security\Permission;
-use CMSBatchAction;
+use SilverStripe\Admin\CMSBatchAction;
+
 
 
 /**

code/Controllers/AssetAdmin.php

@@ -9,7 +9,6 @@ use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\SS_List;
 use SilverStripe\Security\Security;
 use SilverStripe\Security\PermissionProvider;
-use LeftAndMain;
 use Session;
 use Requirements;
 use CMSBatchActionHandler;
@@ -51,6 +50,10 @@ use Injector;
 use Director;
 use ArrayData;
 use CMSBatchAction;
+use SilverStripe\Admin\CMSBatchActionHandler;
+use SilverStripe\Admin\LeftAndMain;
+use SilverStripe\Admin\CMSBatchAction;
+
 
 
 

code/Controllers/CMSMain.php

@@ -3,6 +3,7 @@
 namespace SilverStripe\CMS\Controllers;
 
 use ResetFormAction;
+use SilverStripe\Admin\CMSPreviewable;
 use SilverStripe\ORM\FieldType\DBHTMLText;
 use SilverStripe\ORM\SS_List;
 use SilverStripe\ORM\Versioning\Versioned;
@@ -16,7 +17,10 @@ use SilverStripe\Security\Security;
 use SilverStripe\Security\SecurityToken;
 use SilverStripe\Security\Permission;
 use SilverStripe\Security\PermissionProvider;
-use LeftAndMain;
+use SilverStripe\Admin\CMSBatchActionHandler;
+use SilverStripe\Admin\AdminRootController;
+use SilverStripe\Admin\AddToCampaignHandler;
+use SilverStripe\Admin\LeftAndMain;
 
 
 use SS_HTTPRequest;
@@ -734,7 +738,7 @@ class CMSMain extends LeftAndMain implements CurrentPageIdentifier, PermissionPr
 			$form->setValidationExemptActions(array('restore', 'revert', 'deletefromlive', 'delete', 'unpublish', 'rollback', 'doRollback'));
 
 			// Announce the capability so the frontend can decide whether to allow preview or not.
-			if(in_array('CMSPreviewable', class_implements($record))) {
+			if ($record instanceof CMSPreviewable) {
 				$form->addExtraClass('cms-previewable');
 			}
 

code/Controllers/CMSSiteTreeFilter.php

@@ -7,9 +7,10 @@ use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\SS_List;
 use SilverStripe\ORM\Versioning\Versioned;
 use Object;
-use LeftAndMain_SearchFilter;
 use ClassInfo;
 use DateField;
+use SilverStripe\Admin\LeftAndMain_SearchFilter;
+
 
 /**
  * Base class for filtering the subtree for certain node statuses.

code/Controllers/SilverStripeNavigator.php

@@ -9,10 +9,11 @@ use SilverStripe\ORM\Versioning\Versioned;
 use SilverStripe\ORM\FieldType\DBField;
 use SilverStripe\Security\Member;
 use ViewableData;
-use CMSPreviewable;
 use ClassInfo;
-use LeftAndMain;
 use Controller;
+use SilverStripe\Admin\CMSPreviewable;
+use SilverStripe\Admin\LeftAndMain;
+
 
 use SiteTreeFutureState;
 use SilverStripe\CMS\Model\RedirectorPage;
@@ -222,7 +223,7 @@ abstract class SilverStripeNavigatorItem extends ViewableData {
 				(!$currentDraft || ($currentDraft && $this->record->Version != $currentDraft->Version))
 				&& (!$currentLive || ($currentLive && $this->record->Version != $currentLive->Version))
 			);
-		}
+}
 
 		return $this->record->_cached_isArchived;
 	}

code/Model/SiteTree.php

@@ -19,7 +19,6 @@ use SilverStripe\Security\Permission;
 use SilverStripe\Security\Group;
 use SilverStripe\Security\PermissionProvider;
 use i18nEntityProvider;
-use CMSPreviewable;
 use Director;
 use SilverStripe\CMS\Controllers\RootURLController;
 use ClassInfo;
@@ -52,9 +51,11 @@ use TreeDropdownField;
 use FieldGroup;
 use CheckboxField;
 use ListboxField;
-use AddToCampaignHandler_FormAction;
 use FormAction;
 use i18n;
+use SilverStripe\Admin\AddToCampaignHandler_FormAction;
+use SilverStripe\Admin\CMSPreviewable;
+
 
 /**
  * Basic data-object representing all pages within the site tree. All page types that live within the hierarchy should
@@ -1467,7 +1468,6 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
 		}
 
 		if(Permission::check('CMS_ACCESS_CMSMain')
-			&& in_array('CMSPreviewable', class_implements($this))
 			&& !$this instanceof ErrorPage
 			&& $this->ID > 0
 		) {

tests/controller/CMSMainTest.php

@@ -6,6 +6,8 @@ use SilverStripe\ORM\Versioning\Versioned;
 use SilverStripe\ORM\HiddenClass;
 use SilverStripe\CMS\Controllers\CMSMain;
 use SilverStripe\CMS\Model\SiteTree;
+use SilverStripe\Admin\CMSBatchActionHandler;
+
 
 
 /**