From c9b6e9bac0aaf78e3b2963c9e6ad38ad27fa46f1 Mon Sep 17 00:00:00 2001
From: Damian Mooyman <damian@silverstripe.com>
Date: Tue, 23 Aug 2016 14:32:26 +1200
Subject: [PATCH] API Update template lookup to late resolution for performance
 reasons API Update behaviour of form fields to use standard template lookup
 mechanism API Support custom "type" parameter to template lookup

---
 Security/Member.php                           |  8 ++-
 admin/code/LeftAndMain.php                    |  3 +-
 admin/code/SecurityAdmin.php                  |  4 +-
 .../templates/{forms => }/CMSTabSet.ss        |  0
 .../{forms => }/CheckboxField_holder.ss       |  0
 .../{forms => }/CheckboxField_holder_small.ss |  0
 .../templates/{forms => }/CheckboxSetField.ss |  0
 .../templates/{forms => }/CompositeField.ss   |  0
 .../{forms => }/CompositeField_holder.ss      |  0
 .../CompositeField_holder_small.ss            |  0
 .../templates/{forms => }/CreditCardField.ss  |  0
 .../templates/{forms => }/DatetimeField.ss    |  0
 .../{forms => }/DatetimeField_holder.ss       |  0
 .../templates/{forms => }/FieldGroup.ss       |  0
 .../FieldGroup_DefaultFieldHolder.ss          |  0
 .../{forms => }/FieldGroup_holder.ss          |  0
 .../{forms => }/FormAction_holder_small.ss    |  0
 .../templates/{forms => }/FormField.ss        |  0
 .../templates/{forms => }/FormField_holder.ss |  0
 .../{forms => }/FormField_holder_small.ss     |  0
 .../templates/{forms => }/LabelField.ss       |  0
 .../templates/{forms => }/LookupField.ss      |  0
 .../MemberDatetimeOptionsetField.ss           |  0
 .../templates/{forms => }/MoneyField.ss       |  0
 .../templates/{forms => }/OptionsetField.ss   |  0
 .../{forms => }/OptionsetField_holder.ss      |  0
 .../templates/{forms => }/PhoneNumberField.ss |  0
 .../templates/{forms => }/ReadonlyField.ss    |  0
 .../templates/{forms => }/SelectionGroup.ss   |  0
 api/RSSFeed.php                               | 23 +++++--
 core/ClassInfo.php                            | 32 +++++-----
 .../01_Templates/01_Syntax.md                 | 10 +--
 docs/en/04_Changelogs/4.0.0.md                | 14 ++++-
 email/Email.php                               |  8 ++-
 forms/Form.php                                | 28 ++++++---
 forms/FormField.php                           | 21 ++-----
 .../GridFieldAddExistingAutocompleter.php     | 19 +++---
 forms/gridfield/GridFieldAddNewButton.php     |  3 +-
 forms/gridfield/GridFieldButtonRow.php        |  3 +-
 forms/gridfield/GridFieldDetailForm.php       | 33 +++++++---
 forms/gridfield/GridFieldEditButton.php       |  7 ++-
 forms/gridfield/GridFieldFilterHeader.php     |  3 +-
 forms/gridfield/GridFieldFooter.php           |  6 +-
 forms/gridfield/GridFieldLevelup.php          | 62 +++++++++++--------
 forms/gridfield/GridFieldPageCount.php        | 15 ++---
 forms/gridfield/GridFieldPaginator.php        | 25 ++++----
 forms/gridfield/GridFieldPrintButton.php      |  4 +-
 forms/gridfield/GridFieldSortableHeader.php   |  3 +-
 forms/gridfield/GridFieldToolbarHeader.php    |  9 ++-
 forms/gridfield/GridFieldViewButton.php       | 16 +++--
 templates/{forms => }/AssetField.ss           |  0
 templates/{forms => }/AssetUploadField.ss     |  0
 templates/{forms => }/CheckboxField.ss        |  0
 templates/{forms => }/CheckboxField_holder.ss |  0
 .../{forms => }/CheckboxField_holder_small.ss |  0
 templates/{forms => }/CheckboxSetField.ss     |  0
 templates/{forms => }/CompositeField.ss       |  0
 .../{forms => }/CompositeField_holder.ss      |  0
 .../CompositeField_holder_small.ss            |  0
 templates/{forms => }/CreditCardField.ss      |  0
 templates/{forms => }/DatetimeField.ss        |  0
 templates/{forms => }/DropdownField.ss        |  0
 templates/{forms => }/FieldGroup.ss           |  0
 .../FieldGroup_DefaultFieldHolder.ss          |  0
 templates/{forms => }/FieldGroup_holder.ss    |  0
 templates/{forms => }/FileField.ss            |  0
 templates/{forms => }/FormAction.ss           |  0
 templates/{forms => }/FormField.ss            |  0
 templates/{forms => }/FormField_holder.ss     |  0
 .../{forms => }/FormField_holder_small.ss     |  0
 templates/{forms => }/GroupedDropdownField.ss |  0
 .../HTMLEditorField_UploadField.ss            |  0
 templates/{forms => }/HTMLReadonlyField.ss    |  0
 templates/{forms => }/HeaderField.ss          |  0
 templates/{forms => }/HiddenField.ss          |  0
 templates/Includes/GridFieldItemEditView.ss   |  5 --
 templates/{forms => }/LabelField.ss           |  0
 templates/{forms => }/ListboxField.ss         |  0
 templates/{forms => }/LookupField.ss          |  0
 .../MemberDatetimeOptionsetField.ss           |  0
 ...DatetimeOptionsetField_description_date.ss |  0
 ...DatetimeOptionsetField_description_time.ss |  0
 templates/{forms => }/MoneyField.ss           |  0
 templates/{forms => }/OptionsetField.ss       |  0
 .../{forms => }/OptionsetField_holder.ss      |  0
 templates/{forms => }/ReadonlyField.ss        |  0
 templates/{forms => }/SelectionGroup.ss       |  0
 templates/{forms => }/TabSet.ss               |  0
 templates/{forms => }/TextField.ss            |  0
 templates/{forms => }/TextareaField.ss        |  0
 templates/{forms => }/ToggleCompositeField.ss |  0
 templates/{forms => }/TreeDropdownField.ss    |  0
 templates/{forms => }/UploadField.ss          |  0
 tests/api/RSSFeedTest.php                     |  2 +-
 .../core/manifest/ThemeResourceLoaderTest.php | 25 ++++++++
 .../MemberDatetimeOptionsetFieldTest.php      |  2 +-
 tests/view/SSViewerTest.php                   | 49 ++++++++++++---
 view/SSViewer.php                             | 53 +++++++++-------
 view/ThemeResourceLoader.php                  | 14 ++---
 99 files changed, 322 insertions(+), 187 deletions(-)
 rename admin/themes/cms-forms/templates/{forms => }/CMSTabSet.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CheckboxField_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CheckboxField_holder_small.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CheckboxSetField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CompositeField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CompositeField_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CompositeField_holder_small.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/CreditCardField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/DatetimeField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/DatetimeField_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FieldGroup.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FieldGroup_DefaultFieldHolder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FieldGroup_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FormAction_holder_small.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FormField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FormField_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/FormField_holder_small.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/LabelField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/LookupField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/MemberDatetimeOptionsetField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/MoneyField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/OptionsetField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/OptionsetField_holder.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/PhoneNumberField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/ReadonlyField.ss (100%)
 rename admin/themes/cms-forms/templates/{forms => }/SelectionGroup.ss (100%)
 rename templates/{forms => }/AssetField.ss (100%)
 rename templates/{forms => }/AssetUploadField.ss (100%)
 rename templates/{forms => }/CheckboxField.ss (100%)
 rename templates/{forms => }/CheckboxField_holder.ss (100%)
 rename templates/{forms => }/CheckboxField_holder_small.ss (100%)
 rename templates/{forms => }/CheckboxSetField.ss (100%)
 rename templates/{forms => }/CompositeField.ss (100%)
 rename templates/{forms => }/CompositeField_holder.ss (100%)
 rename templates/{forms => }/CompositeField_holder_small.ss (100%)
 rename templates/{forms => }/CreditCardField.ss (100%)
 rename templates/{forms => }/DatetimeField.ss (100%)
 rename templates/{forms => }/DropdownField.ss (100%)
 rename templates/{forms => }/FieldGroup.ss (100%)
 rename templates/{forms => }/FieldGroup_DefaultFieldHolder.ss (100%)
 rename templates/{forms => }/FieldGroup_holder.ss (100%)
 rename templates/{forms => }/FileField.ss (100%)
 rename templates/{forms => }/FormAction.ss (100%)
 rename templates/{forms => }/FormField.ss (100%)
 rename templates/{forms => }/FormField_holder.ss (100%)
 rename templates/{forms => }/FormField_holder_small.ss (100%)
 rename templates/{forms => }/GroupedDropdownField.ss (100%)
 rename templates/{forms => }/HTMLEditorField_UploadField.ss (100%)
 rename templates/{forms => }/HTMLReadonlyField.ss (100%)
 rename templates/{forms => }/HeaderField.ss (100%)
 rename templates/{forms => }/HiddenField.ss (100%)
 delete mode 100644 templates/Includes/GridFieldItemEditView.ss
 rename templates/{forms => }/LabelField.ss (100%)
 rename templates/{forms => }/ListboxField.ss (100%)
 rename templates/{forms => }/LookupField.ss (100%)
 rename templates/{forms => }/MemberDatetimeOptionsetField.ss (100%)
 rename templates/{forms => }/MemberDatetimeOptionsetField_description_date.ss (100%)
 rename templates/{forms => }/MemberDatetimeOptionsetField_description_time.ss (100%)
 rename templates/{forms => }/MoneyField.ss (100%)
 rename templates/{forms => }/OptionsetField.ss (100%)
 rename templates/{forms => }/OptionsetField_holder.ss (100%)
 rename templates/{forms => }/ReadonlyField.ss (100%)
 rename templates/{forms => }/SelectionGroup.ss (100%)
 rename templates/{forms => }/TabSet.ss (100%)
 rename templates/{forms => }/TextField.ss (100%)
 rename templates/{forms => }/TextareaField.ss (100%)
 rename templates/{forms => }/ToggleCompositeField.ss (100%)
 rename templates/{forms => }/TreeDropdownField.ss (100%)
 rename templates/{forms => }/UploadField.ss (100%)

diff --git a/Security/Member.php b/Security/Member.php
index b2f149b63..6ae597b13 100644
--- a/Security/Member.php
+++ b/Security/Member.php
@@ -15,6 +15,7 @@ use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\Queries\SQLSelect;
 use SilverStripe\ORM\ManyManyList;
 use SilverStripe\MSSQL\MSSQLDatabase;
+use SSViewer;
 use TemplateGlobalProvider;
 use Deprecation;
 use i18n;
@@ -1541,8 +1542,10 @@ class Member extends DataObject implements TemplateGlobalProvider {
 					$dateFormatMap
 				)
 			);
+			$formatClass = get_class($dateFormatField);
 			$dateFormatField->setValue($self->DateFormat);
-			$dateFormatField->setDescriptionTemplate('forms/MemberDatetimeOptionsetField_description_date');
+			$dateTemplate = SSViewer::get_templates_by_class($formatClass, '_description_date', $formatClass);
+			$dateFormatField->setDescriptionTemplate($dateTemplate);
 
 			$defaultTimeFormat = Zend_Locale_Format::getTimeFormat(new Zend_Locale($self->Locale));
 			$timeFormatMap = array(
@@ -1559,7 +1562,8 @@ class Member extends DataObject implements TemplateGlobalProvider {
 				)
 			);
 			$timeFormatField->setValue($self->TimeFormat);
-			$timeFormatField->setDescriptionTemplate('forms/MemberDatetimeOptionsetField_description_time');
+			$timeTemplate = SSViewer::get_templates_by_class($formatClass,'_description_time', $formatClass);
+			$timeFormatField->setDescriptionTemplate($timeTemplate);
 		});
 
 		return parent::getCMSFields();
diff --git a/admin/code/LeftAndMain.php b/admin/code/LeftAndMain.php
index 6b10f7984..ff3e41603 100644
--- a/admin/code/LeftAndMain.php
+++ b/admin/code/LeftAndMain.php
@@ -972,7 +972,8 @@ class LeftAndMain extends Controller implements PermissionProvider {
 	 * @return array
 	 */
 	public function getTemplatesWithSuffix($suffix) {
-		return SSViewer::get_templates_by_class(get_class($this), $suffix, 'SilverStripe\\Admin\\LeftAndMain');
+		$templates = SSViewer::get_templates_by_class(get_class($this), $suffix, __CLASS__);
+		return SSViewer::chooseTemplate($templates);
 	}
 
 	public function Content() {
diff --git a/admin/code/SecurityAdmin.php b/admin/code/SecurityAdmin.php
index 06b39a3d6..8b4d4c688 100755
--- a/admin/code/SecurityAdmin.php
+++ b/admin/code/SecurityAdmin.php
@@ -165,7 +165,7 @@ class SecurityAdmin extends LeftAndMain implements PermissionProvider {
 		// Add import capabilities. Limit to admin since the import logic can affect assigned permissions
 		if(Permission::check('ADMIN')) {
 			$fields->addFieldsToTab('Root.Users', array(
-				new HeaderField(_t('SecurityAdmin.IMPORTUSERS', 'Import users'), 3),
+				new HeaderField('ImportUsersHeader', _t('SecurityAdmin.IMPORTUSERS', 'Import users'), 3),
 				new LiteralField(
 					'MemberImportFormIframe',
 					sprintf(
@@ -176,7 +176,7 @@ class SecurityAdmin extends LeftAndMain implements PermissionProvider {
 				)
 			));
 			$fields->addFieldsToTab('Root.Groups', array(
-				new HeaderField(_t('SecurityAdmin.IMPORTGROUPS', 'Import groups'), 3),
+				new HeaderField('ImportGroupsHeader', _t('SecurityAdmin.IMPORTGROUPS', 'Import groups'), 3),
 				new LiteralField(
 					'GroupImportFormIframe',
 					sprintf(
diff --git a/admin/themes/cms-forms/templates/forms/CMSTabSet.ss b/admin/themes/cms-forms/templates/CMSTabSet.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CMSTabSet.ss
rename to admin/themes/cms-forms/templates/CMSTabSet.ss
diff --git a/admin/themes/cms-forms/templates/forms/CheckboxField_holder.ss b/admin/themes/cms-forms/templates/CheckboxField_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CheckboxField_holder.ss
rename to admin/themes/cms-forms/templates/CheckboxField_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/CheckboxField_holder_small.ss b/admin/themes/cms-forms/templates/CheckboxField_holder_small.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CheckboxField_holder_small.ss
rename to admin/themes/cms-forms/templates/CheckboxField_holder_small.ss
diff --git a/admin/themes/cms-forms/templates/forms/CheckboxSetField.ss b/admin/themes/cms-forms/templates/CheckboxSetField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CheckboxSetField.ss
rename to admin/themes/cms-forms/templates/CheckboxSetField.ss
diff --git a/admin/themes/cms-forms/templates/forms/CompositeField.ss b/admin/themes/cms-forms/templates/CompositeField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CompositeField.ss
rename to admin/themes/cms-forms/templates/CompositeField.ss
diff --git a/admin/themes/cms-forms/templates/forms/CompositeField_holder.ss b/admin/themes/cms-forms/templates/CompositeField_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CompositeField_holder.ss
rename to admin/themes/cms-forms/templates/CompositeField_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/CompositeField_holder_small.ss b/admin/themes/cms-forms/templates/CompositeField_holder_small.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CompositeField_holder_small.ss
rename to admin/themes/cms-forms/templates/CompositeField_holder_small.ss
diff --git a/admin/themes/cms-forms/templates/forms/CreditCardField.ss b/admin/themes/cms-forms/templates/CreditCardField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/CreditCardField.ss
rename to admin/themes/cms-forms/templates/CreditCardField.ss
diff --git a/admin/themes/cms-forms/templates/forms/DatetimeField.ss b/admin/themes/cms-forms/templates/DatetimeField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/DatetimeField.ss
rename to admin/themes/cms-forms/templates/DatetimeField.ss
diff --git a/admin/themes/cms-forms/templates/forms/DatetimeField_holder.ss b/admin/themes/cms-forms/templates/DatetimeField_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/DatetimeField_holder.ss
rename to admin/themes/cms-forms/templates/DatetimeField_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/FieldGroup.ss b/admin/themes/cms-forms/templates/FieldGroup.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FieldGroup.ss
rename to admin/themes/cms-forms/templates/FieldGroup.ss
diff --git a/admin/themes/cms-forms/templates/forms/FieldGroup_DefaultFieldHolder.ss b/admin/themes/cms-forms/templates/FieldGroup_DefaultFieldHolder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FieldGroup_DefaultFieldHolder.ss
rename to admin/themes/cms-forms/templates/FieldGroup_DefaultFieldHolder.ss
diff --git a/admin/themes/cms-forms/templates/forms/FieldGroup_holder.ss b/admin/themes/cms-forms/templates/FieldGroup_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FieldGroup_holder.ss
rename to admin/themes/cms-forms/templates/FieldGroup_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/FormAction_holder_small.ss b/admin/themes/cms-forms/templates/FormAction_holder_small.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FormAction_holder_small.ss
rename to admin/themes/cms-forms/templates/FormAction_holder_small.ss
diff --git a/admin/themes/cms-forms/templates/forms/FormField.ss b/admin/themes/cms-forms/templates/FormField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FormField.ss
rename to admin/themes/cms-forms/templates/FormField.ss
diff --git a/admin/themes/cms-forms/templates/forms/FormField_holder.ss b/admin/themes/cms-forms/templates/FormField_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FormField_holder.ss
rename to admin/themes/cms-forms/templates/FormField_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/FormField_holder_small.ss b/admin/themes/cms-forms/templates/FormField_holder_small.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/FormField_holder_small.ss
rename to admin/themes/cms-forms/templates/FormField_holder_small.ss
diff --git a/admin/themes/cms-forms/templates/forms/LabelField.ss b/admin/themes/cms-forms/templates/LabelField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/LabelField.ss
rename to admin/themes/cms-forms/templates/LabelField.ss
diff --git a/admin/themes/cms-forms/templates/forms/LookupField.ss b/admin/themes/cms-forms/templates/LookupField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/LookupField.ss
rename to admin/themes/cms-forms/templates/LookupField.ss
diff --git a/admin/themes/cms-forms/templates/forms/MemberDatetimeOptionsetField.ss b/admin/themes/cms-forms/templates/MemberDatetimeOptionsetField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/MemberDatetimeOptionsetField.ss
rename to admin/themes/cms-forms/templates/MemberDatetimeOptionsetField.ss
diff --git a/admin/themes/cms-forms/templates/forms/MoneyField.ss b/admin/themes/cms-forms/templates/MoneyField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/MoneyField.ss
rename to admin/themes/cms-forms/templates/MoneyField.ss
diff --git a/admin/themes/cms-forms/templates/forms/OptionsetField.ss b/admin/themes/cms-forms/templates/OptionsetField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/OptionsetField.ss
rename to admin/themes/cms-forms/templates/OptionsetField.ss
diff --git a/admin/themes/cms-forms/templates/forms/OptionsetField_holder.ss b/admin/themes/cms-forms/templates/OptionsetField_holder.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/OptionsetField_holder.ss
rename to admin/themes/cms-forms/templates/OptionsetField_holder.ss
diff --git a/admin/themes/cms-forms/templates/forms/PhoneNumberField.ss b/admin/themes/cms-forms/templates/PhoneNumberField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/PhoneNumberField.ss
rename to admin/themes/cms-forms/templates/PhoneNumberField.ss
diff --git a/admin/themes/cms-forms/templates/forms/ReadonlyField.ss b/admin/themes/cms-forms/templates/ReadonlyField.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/ReadonlyField.ss
rename to admin/themes/cms-forms/templates/ReadonlyField.ss
diff --git a/admin/themes/cms-forms/templates/forms/SelectionGroup.ss b/admin/themes/cms-forms/templates/SelectionGroup.ss
similarity index 100%
rename from admin/themes/cms-forms/templates/forms/SelectionGroup.ss
rename to admin/themes/cms-forms/templates/SelectionGroup.ss
diff --git a/api/RSSFeed.php b/api/RSSFeed.php
index f3023eb4a..294647426 100644
--- a/api/RSSFeed.php
+++ b/api/RSSFeed.php
@@ -1,12 +1,10 @@
 <?php
 
-
 use SilverStripe\ORM\SS_List;
 use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\FieldType\DBField;
 use SilverStripe\ORM\FieldType\DBHTMLText;
 
-
 /**
  * RSSFeed class
  *
@@ -91,9 +89,11 @@ class RSSFeed extends ViewableData {
 	protected $etag;
 
 	/**
+	 * Custom template
+	 *
 	 * @var string
 	 */
-	protected $template = 'RSSFeed';
+	protected $template = null;
 
 	/**
 	 * Constructor
@@ -219,7 +219,7 @@ class RSSFeed extends ViewableData {
 
 		Config::inst()->update('SSViewer', 'source_file_comments', $prevState);
 
-		return $this->renderWith($this->getTemplate());
+		return $this->renderWith($this->getTemplates());
 	}
 
 	/**
@@ -240,6 +240,21 @@ class RSSFeed extends ViewableData {
 	public function getTemplate() {
 		return $this->template;
 	}
+
+	/**
+	 * Returns the ordered list of preferred templates for rendering this object.
+	 * Will prioritise any custom template first, and then templates based on class hiearchy next.
+	 *
+	 * @return array
+	 */
+	public function getTemplates() {
+		$templates = SSViewer::get_templates_by_class(get_class($this), '', __CLASS__);
+		// Prefer any custom template
+		if($this->getTemplate()) {
+			array_unshift($templates, $this->getTemplate());
+		}
+		return $templates;
+	}
 }
 
 /**
diff --git a/core/ClassInfo.php b/core/ClassInfo.php
index aa923a559..902211172 100644
--- a/core/ClassInfo.php
+++ b/core/ClassInfo.php
@@ -87,15 +87,17 @@ class ClassInfo {
 	 *
 	 * @todo Move this into {@see DataObjectSchema}
 	 *
-	 * @param string|object $class
+	 * @param string|object $nameOrObject Class or object instance
 	 * @return array
 	 */
-	public static function dataClassesFor($class) {
-		if(is_string($class) && !class_exists($class)) return array();
+	public static function dataClassesFor($nameOrObject) {
+		if(is_string($nameOrObject) && !class_exists($nameOrObject)) {
+			return array();
+		}
 
 		$result = array();
 
-		$class = self::class_name($class);
+		$class = self::class_name($nameOrObject);
 
 		$classes = array_merge(
 			self::ancestry($class),
@@ -134,17 +136,17 @@ class ClassInfo {
 	 * )
 	 * </code>
 	 *
-	 * @param mixed $class string of the classname or instance of the class
+	 * @param string|object $nameOrObject The classname or object
 	 * @return array Names of all subclasses as an associative array.
 	 */
-	public static function subclassesFor($class) {
-		if(is_string($class) && !class_exists($class)) {
+	public static function subclassesFor($nameOrObject) {
+		if(is_string($nameOrObject) && !class_exists($nameOrObject)) {
 			return [];
 		}
 
 		//normalise class case
-		$className = self::class_name($class);
-		$descendants = SS_ClassLoader::instance()->getManifest()->getDescendantsOf($class);
+		$className = self::class_name($nameOrObject);
+		$descendants = SS_ClassLoader::instance()->getManifest()->getDescendantsOf($className);
 		$result      = array($className => $className);
 
 		if ($descendants) {
@@ -174,14 +176,16 @@ class ClassInfo {
 	 * Returns the passed class name along with all its parent class names in an
 	 * array, sorted with the root class first.
 	 *
-	 * @param  string $class
-	 * @param  bool $tablesOnly Only return classes that have a table in the db.
+	 * @param string|object $nameOrObject Class or object instance
+	 * @param bool $tablesOnly Only return classes that have a table in the db.
 	 * @return array
 	 */
-	public static function ancestry($class, $tablesOnly = false) {
-		if(is_string($class) && !class_exists($class)) return array();
+	public static function ancestry($nameOrObject, $tablesOnly = false) {
+		if(is_string($nameOrObject) && !class_exists($nameOrObject)) {
+			return array();
+		}
 
-		$class = self::class_name($class);
+		$class = self::class_name($nameOrObject);
 
 		$lClass = strtolower($class);
 
diff --git a/docs/en/02_Developer_Guides/01_Templates/01_Syntax.md b/docs/en/02_Developer_Guides/01_Templates/01_Syntax.md
index 36c7a21ed..2062878f8 100644
--- a/docs/en/02_Developer_Guides/01_Templates/01_Syntax.md
+++ b/docs/en/02_Developer_Guides/01_Templates/01_Syntax.md
@@ -201,11 +201,13 @@ You can use inequalities like `<`, `<=`, `>`, `>=` to compare numbers.
 ## Includes
 
 Within SilverStripe templates we have the ability to include other templates using the `<% include %>` tag. The includes
-will be searched for using the same filename look-up rules as a regular template, so this will include 
-`templates/Includes/Sidebar.ss`
+will be searched for using the same filename look-up rules as a regular template. However in the case of the include tag
+an additional `Includes` directory will be inserted into the resolved path just prior to the filename.
 
-	:::ss
-	<% include Includes\SideBar %>
+ E.g.
+  
+  * `<% include SideBar %>` will include `templates/Includes/Sidebar.ss`
+  * `<% include MyNamespace/SideBar %>` will include `templates/MyNamespace/Includes/Sidebar.ss`
 
 Note that in SilverStripe 3, you didn't have to specify a namespace in your `include` tag, as the template engine didn't
 use namespaces. As of SilverStripe 4, the template namespaces need to match the folder structure of your template files.
diff --git a/docs/en/04_Changelogs/4.0.0.md b/docs/en/04_Changelogs/4.0.0.md
index ed378305d..955ff7fd5 100644
--- a/docs/en/04_Changelogs/4.0.0.md
+++ b/docs/en/04_Changelogs/4.0.0.md
@@ -63,6 +63,7 @@
  * Search filter classes (e.g. `ExactMatchFilter`) are now registered with `Injector`
    via a new `DataListFilter.` prefix convention.
    see [search filter documentation](/developer_guides/model/searchfilters) for more information.
+ * FormField templates no longer look in the 'forms' folder for templates.
 
 ## New API
 
@@ -126,6 +127,9 @@
  * `PopoverField` added to provide popup-menu behaviour in react forms (currently not available for
    non-react forms).
  * Admin URL can now be configured via custom Director routing rule
+ * Templates now use a standard template lookup system via `SSViewer::get_templates_by_class`
+   which builds a candidate list for a given class. Actual resolution of existing templates
+   for any list of candidates is actually performed by `SSViewer::chooseTemplate`
 
 ### Front-end build tooling for CMS interface
 
@@ -415,8 +419,14 @@ require manual intervention, please see the below upgrading notes.
 Templates are now much more strict about their locations. You can no longer put a template in an arbitrary
 folder and have it be found. Case is now also checked on case-sensitive filesystems.
 
-Either include the folder in the template name (`renderWith('Field.ss')` => `renderWith('forms/Field.ss')`), move the 
-template into the correct directory, or both.
+Either include the folder in the template name (`renderWith('MyEmail.ss')` => `renderWith('emails/MyEmail.ss')`),
+move the template into the correct directory, or both.
+
+When using `<% include %>` template tag you should continue to leave out the `Includes` folder. 
+`<% include Sidebar %>` will match only match `Includes/Sidebar.ss`, not `Sidebar.ss`.
+Please refer to our [template syntax](/developer_guides/templates/syntax) for details.
+
+The `forms` template folder is no longer used to lookup templates for `FormField` instances.
 
 ### Update code that uses SQLQuery
 
diff --git a/email/Email.php b/email/Email.php
index 807eff6b9..25063f12c 100644
--- a/email/Email.php
+++ b/email/Email.php
@@ -479,9 +479,11 @@ class Email extends ViewableData {
 			if($this->ss_template && !$isPlain) {
 				// Requery data so that updated versions of To, From, Subject, etc are included
 				$data = $this->templateData();
-
-				$template = new SSViewer('email/'.$this->ss_template);
-
+				$candidateTemplates = [
+					$this->ss_template,
+					[ 'type' => 'email', $this->ss_template ]
+				];
+				$template = new SSViewer($candidateTemplates);
 				if($template->exists()) {
 					$fullBody = $template->process($data);
 				}
diff --git a/forms/Form.php b/forms/Form.php
index 06bde80c7..462f92ae9 100644
--- a/forms/Form.php
+++ b/forms/Form.php
@@ -1025,14 +1025,27 @@ class Form extends RequestHandler {
 
 	/**
 	 * Return the template to render this form with.
-	 * If the template isn't set, then default to the
-	 * form class name e.g "Form".
 	 *
 	 * @return string
 	 */
 	public function getTemplate() {
-		if($this->template) return $this->template;
-		else return $this->class;
+		return $this->template;
+	}
+
+	/**
+	 * Returs the ordered list of preferred templates for rendering this form
+	 * If the template isn't set, then default to the
+	 * form class name e.g "Form".
+	 *
+	 * @return array
+	 */
+	public function getTemplates() {
+		$templates = SSViewer::get_templates_by_class(get_class($this), '', __CLASS__);
+		// Prefer any custom template
+		if($this->getTemplate()) {
+			array_unshift($templates, $this->getTemplate());
+		}
+		return $templates;
 	}
 
 	/**
@@ -1639,10 +1652,7 @@ class Form extends RequestHandler {
 	 * @return DBHTMLText
 	 */
 	public function forTemplate() {
-		$return = $this->renderWith(array_merge(
-			(array)$this->getTemplate(),
-			array('Includes/Form')
-		));
+		$return = $this->renderWith($this->getTemplates());
 
 		// Now that we're rendered, clear message
 		$this->clearMessage();
@@ -1742,7 +1752,7 @@ class Form extends RequestHandler {
 
 	/**
 	 * Get a list of all actions, including those in the main "fields" FieldList
-	 * 
+	 *
 	 * @return array
 	 */
 	protected function getAllActions() {
diff --git a/forms/FormField.php b/forms/FormField.php
index 3b18a2fdc..944d25c21 100644
--- a/forms/FormField.php
+++ b/forms/FormField.php
@@ -761,7 +761,6 @@ class FormField extends RequestHandler {
 	 *
 	 * @param mixed $value
 	 * @param null|array|DataObject $data {@see Form::loadDataFrom}
-	 *
 	 * @return $this
 	 */
 	public function setValue($value) {
@@ -1048,22 +1047,14 @@ class FormField extends RequestHandler {
 	 *
 	 * @return array
 	 */
-	private function _templates($customTemplate = null, $customTemplateSuffix = null) {
-		$matches = array();
-
-		foreach(array_reverse(ClassInfo::ancestry($this)) as $className) {
-			$matches[] = 'forms/'. $className . $customTemplateSuffix;
-
-			if($className == "FormField") {
-				break;
-			}
-		}
-
+	protected function _templates($customTemplate = null, $customTemplateSuffix = null) {
+		$templates = SSViewer::get_templates_by_class(get_class($this), $customTemplateSuffix, __CLASS__);
+		// Prefer any custom template
 		if($customTemplate) {
-			array_unshift($matches, 'forms/'.$customTemplate);
+			// Prioritise direct template
+			array_unshift($templates, $customTemplate);
 		}
-
-		return $matches;
+		return $templates;
 	}
 
 	/**
diff --git a/forms/gridfield/GridFieldAddExistingAutocompleter.php b/forms/gridfield/GridFieldAddExistingAutocompleter.php
index ebda46f2b..03bd78901 100644
--- a/forms/gridfield/GridFieldAddExistingAutocompleter.php
+++ b/forms/gridfield/GridFieldAddExistingAutocompleter.php
@@ -25,13 +25,6 @@ use SilverStripe\ORM\DataList;
 class GridFieldAddExistingAutocompleter
 	implements GridField_HTMLProvider, GridField_ActionProvider, GridField_DataManipulator, GridField_URLHandler {
 
-	/**
-	 * Which template to use for rendering
-	 *
-	 * @var string $itemClass
-	 */
-	protected $itemClass = 'GridFieldAddExistingAutocompleter';
-
 	/**
 	 * The HTML fragment to write this component into
 	 */
@@ -84,6 +77,7 @@ class GridFieldAddExistingAutocompleter
 
 	/**
 	 *
+	 * @param string $targetFragment
 	 * @param array $searchFields Which fields on the object in the list should be searched
 	 */
 	public function __construct($targetFragment = 'before', $searchFields = null) {
@@ -97,7 +91,7 @@ class GridFieldAddExistingAutocompleter
 	 * @return string[] - HTML
 	 */
 	public function getHTMLFragments($gridField) {
-		$dataClass = $gridField->getList()->dataClass();
+		$dataClass = $gridField->getModelClass();
 
 		$forTemplate = new ArrayData(array());
 		$forTemplate->Fields = new FieldList();
@@ -130,8 +124,9 @@ class GridFieldAddExistingAutocompleter
 			$forTemplate->Fields->setForm($form);
 		}
 
+		$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
 		return array(
-			$this->targetFragment => $forTemplate->renderWith('Includes/'.$this->itemClass)
+			$this->targetFragment => $forTemplate->renderWith($template)
 		);
 	}
 
@@ -174,7 +169,7 @@ class GridFieldAddExistingAutocompleter
 		if(empty($objectID)) {
 			return $dataList;
 		}
-		$object = DataObject::get_by_id($dataList->dataclass(), $objectID);
+		$object = DataObject::get_by_id($gridField->getModelClass(), $objectID);
 		if($object) {
 			$dataList->add($object);
 		}
@@ -198,9 +193,10 @@ class GridFieldAddExistingAutocompleter
 	 *
 	 * @param GridField $gridField
 	 * @param SS_HTTPRequest $request
+	 * @return string
 	 */
 	public function doSearch($gridField, $request) {
-		$dataClass = $gridField->getList()->dataClass();
+		$dataClass = $gridField->getModelClass();
 		$allList = $this->searchList ? $this->searchList : DataList::create($dataClass);
 
 		$searchFields = ($this->getSearchFields())
@@ -269,6 +265,7 @@ class GridFieldAddExistingAutocompleter
 
 	/**
 	 * @param array $fields
+	 * @return $this
 	 */
 	public function setSearchFields($fields) {
 		$this->searchFields = $fields;
diff --git a/forms/gridfield/GridFieldAddNewButton.php b/forms/gridfield/GridFieldAddNewButton.php
index ca83deb05..740f9d6ef 100644
--- a/forms/gridfield/GridFieldAddNewButton.php
+++ b/forms/gridfield/GridFieldAddNewButton.php
@@ -43,8 +43,9 @@ class GridFieldAddNewButton implements GridField_HTMLProvider {
 			'ButtonName' => $this->buttonName,
 		));
 
+		$templates = SSViewer::get_templates_by_class($this, '', __CLASS__);
 		return array(
-			$this->targetFragment => $data->renderWith('Includes/GridFieldAddNewButton'),
+			$this->targetFragment => $data->renderWith($templates),
 		);
 	}
 
diff --git a/forms/gridfield/GridFieldButtonRow.php b/forms/gridfield/GridFieldButtonRow.php
index 58feae9b4..141d6555d 100644
--- a/forms/gridfield/GridFieldButtonRow.php
+++ b/forms/gridfield/GridFieldButtonRow.php
@@ -26,8 +26,9 @@ class GridFieldButtonRow implements GridField_HTMLProvider {
 			"RightFragment" => "\$DefineFragment(buttons-{$this->targetFragment}-right)",
 		));
 
+		$templates = SSViewer::get_templates_by_class($this, '', __CLASS__);
 		return array(
-			$this->targetFragment => $data->renderWith('Includes/GridFieldButtonRow')
+			$this->targetFragment => $data->renderWith($templates)
 		);
 	}
 }
diff --git a/forms/gridfield/GridFieldDetailForm.php b/forms/gridfield/GridFieldDetailForm.php
index 3dc46c2ec..2aeaf25a8 100644
--- a/forms/gridfield/GridFieldDetailForm.php
+++ b/forms/gridfield/GridFieldDetailForm.php
@@ -127,7 +127,7 @@ class GridFieldDetailForm implements GridField_URLHandler {
 			$class,
 			array($gridField, $this, $record, $requestHandler, $this->name)
 		);
-		$handler->setTemplate($this->template);
+		$handler->setTemplate($this->getTemplate());
 		$this->extend('updateItemRequestHandler', $handler);
 		return $handler;
 	}
@@ -214,7 +214,7 @@ class GridFieldDetailForm implements GridField_URLHandler {
 		} else if(ClassInfo::exists(get_class($this) . "_ItemRequest")) {
 			return get_class($this) . "_ItemRequest";
 		} else {
-			return 'GridFieldDetailForm_ItemRequest';
+			return __CLASS__ . '_ItemRequest';
 		}
 	}
 
@@ -256,7 +256,7 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 
 	/**
 	 *
-	 * @var GridField_URLHandler
+	 * @var GridFieldDetailForm
 	 */
 	protected $component;
 
@@ -283,7 +283,7 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 	/**
 	 * @var String
 	 */
-	protected $template = 'GridFieldItemEditView';
+	protected $template = null;
 
 	private static $url_handlers = array(
 		'$Action!' => '$Action',
@@ -293,7 +293,7 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 	/**
 	 *
 	 * @param GridFIeld $gridField
-	 * @param GridField_URLHandler $component
+	 * @param GridFieldDetailForm $component
 	 * @param DataObject $record
 	 * @param RequestHandler $requestHandler
 	 * @param string $popupFormName
@@ -319,14 +319,14 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 
 		$controller = $this->getToplevelController();
 
-		$form = $this->ItemEditForm($this->gridField, $request);
+		$form = $this->ItemEditForm();
 		$form->makeReadonly();
 
 		$data = new ArrayData(array(
 			'Backlink'     => $controller->Link(),
 			'ItemEditForm' => $form
 		));
-		$return = $data->renderWith($this->template);
+		$return = $data->renderWith($this->getTemplates());
 
 		if($request->isAjax()) {
 			return $return;
@@ -337,12 +337,12 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 
 	public function edit($request) {
 		$controller = $this->getToplevelController();
-		$form = $this->ItemEditForm($this->gridField, $request);
+		$form = $this->ItemEditForm();
 
 		$return = $this->customise(array(
 			'Backlink' => $controller->hasMethod('Backlink') ? $controller->Backlink() : $controller->Link(),
 			'ItemEditForm' => $form,
-		))->renderWith($this->template);
+		))->renderWith($this->getTemplates());
 
 		if($request->isAjax()) {
 			return $return;
@@ -751,6 +751,21 @@ class GridFieldDetailForm_ItemRequest extends RequestHandler {
 		return $this->template;
 	}
 
+	/**
+	 * Get list of templates to use
+	 *
+	 * @return array
+	 */
+	public function getTemplates()
+	{
+		$templates = SSViewer::get_templates_by_class($this, '', __CLASS__);
+		// Prefer any custom template
+		if($this->getTemplate()) {
+			array_unshift($templates, $this->getTemplate());
+		}
+		return $templates;
+	}
+
 	/**
 	 * @return Controller
 	 */
diff --git a/forms/gridfield/GridFieldEditButton.php b/forms/gridfield/GridFieldEditButton.php
index f8178ccd5..6ecfcde78 100644
--- a/forms/gridfield/GridFieldEditButton.php
+++ b/forms/gridfield/GridFieldEditButton.php
@@ -49,6 +49,7 @@ class GridFieldEditButton implements GridField_ColumnProvider {
 		if($columnName == 'Actions') {
 			return array('title' => '');
 		}
+		return [];
 	}
 
 	/**
@@ -75,8 +76,7 @@ class GridFieldEditButton implements GridField_ColumnProvider {
 	 * @param GridField $gridField
 	 * @param DataObject $record
 	 * @param string $columnName
-	 *
-	 * @return string - the HTML for the column
+	 * @return string The HTML for the column
 	 */
 	public function getColumnContent($gridField, $record, $columnName) {
 		// No permission checks, handled through GridFieldDetailForm,
@@ -86,7 +86,8 @@ class GridFieldEditButton implements GridField_ColumnProvider {
 			'Link' => Controller::join_links($gridField->Link('item'), $record->ID, 'edit')
 		));
 
-		return $data->renderWith('Includes/GridFieldEditButton');
+		$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
+		return $data->renderWith($template);
 	}
 
 	/**
diff --git a/forms/gridfield/GridFieldFilterHeader.php b/forms/gridfield/GridFieldFilterHeader.php
index d6086e2e7..462761b8d 100755
--- a/forms/gridfield/GridFieldFilterHeader.php
+++ b/forms/gridfield/GridFieldFilterHeader.php
@@ -161,8 +161,9 @@ class GridFieldFilterHeader implements GridField_HTMLProvider, GridField_DataMan
 			$forTemplate->Fields->push($fields);
 		}
 
+		$templates = SSViewer::get_templates_by_class($this, '_Row', __CLASS__);
 		return array(
-			'header' => $forTemplate->renderWith('Includes/GridFieldFilterHeader_Row'),
+			'header' => $forTemplate->renderWith($templates),
 		);
 	}
 }
diff --git a/forms/gridfield/GridFieldFooter.php b/forms/gridfield/GridFieldFooter.php
index e360ded96..572be8e95 100644
--- a/forms/gridfield/GridFieldFooter.php
+++ b/forms/gridfield/GridFieldFooter.php
@@ -25,7 +25,8 @@ class GridFieldFooter implements GridField_HTMLProvider {
 
 	/**
 	 *
-	 * @param string $message - a message to display in the footer
+	 * @param string $message A message to display in the footer
+	 * @param bool $showrecordcount
 	 */
 	public function __construct($message = null, $showrecordcount = true) {
 		if($message) {
@@ -46,9 +47,10 @@ class GridFieldFooter implements GridField_HTMLProvider {
 			'NumRecords' => $count
 		));
 
+		$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
 		return array(
 			'footer' => $forTemplate->renderWith(
-				'Includes/GridFieldFooter',
+				$template,
 				array(
 					'Colspan' => count($gridField->getColumns())
 				)
diff --git a/forms/gridfield/GridFieldLevelup.php b/forms/gridfield/GridFieldLevelup.php
index 4894f1cbe..d83e395ac 100644
--- a/forms/gridfield/GridFieldLevelup.php
+++ b/forms/gridfield/GridFieldLevelup.php
@@ -35,40 +35,48 @@ class GridFieldLevelup extends Object implements GridField_HTMLProvider {
 	 * @param integer $currentID - The ID of the current item; this button will find that item's parent
 	 */
 	public function __construct($currentID) {
-		if($currentID && is_numeric($currentID)) $this->currentID = $currentID;
+		parent::__construct();
+		if($currentID && is_numeric($currentID)) {
+			$this->currentID = $currentID;
+		}
 	}
 
 	public function getHTMLFragments($gridField) {
 		$modelClass = $gridField->getModelClass();
 		$parentID = 0;
 
-		if($this->currentID) {
-			$modelObj = DataObject::get_by_id($modelClass, $this->currentID);
-
-			if($modelObj->hasMethod('getParent')) {
-				$parent = $modelObj->getParent();
-			} elseif($modelObj->ParentID) {
-				$parent = $modelObj->Parent();
-			}
-
-			if($parent) $parentID = $parent->ID;
-
-			// Attributes
-			$attrs = array_merge($this->attributes, array(
-				'href' => sprintf($this->linkSpec, $parentID),
-				'class' => 'cms-panel-link ss-ui-button font-icon-level-up no-text grid-levelup'
-			));
-			$attrsStr = '';
-			foreach($attrs as $k => $v) $attrsStr .= " $k=\"" . Convert::raw2att($v) . "\"";
-
-			$forTemplate = new ArrayData(array(
-				'UpLink' => DBField::create_field('HTMLFragment', sprintf('<a%s></a>', $attrsStr))
-			));
-
-			return array(
-				'before' => $forTemplate->renderWith('Includes/GridFieldLevelup'),
-			);
+		if(!$this->currentID) {
+			return null;
 		}
+
+		$modelObj = DataObject::get_by_id($modelClass, $this->currentID);
+
+		$parent = null;
+		if($modelObj->hasMethod('getParent')) {
+			$parent = $modelObj->getParent();
+		} elseif($modelObj->ParentID) {
+			$parent = $modelObj->Parent();
+		}
+
+		if ($parent) {
+			$parentID = $parent->ID;
+		}
+
+		// Attributes
+		$attrs = array_merge($this->attributes, array(
+			'href' => sprintf($this->linkSpec, $parentID),
+			'class' => 'cms-panel-link ss-ui-button font-icon-level-up no-text grid-levelup'
+		));
+		$linkTag = FormField::create_tag('a', $attrs);
+
+		$forTemplate = new ArrayData(array(
+			'UpLink' => DBField::create_field('HTMLFragment', $linkTag)
+		));
+
+		$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
+			return array(
+			'before' => $forTemplate->renderWith($template),
+		);
 	}
 
 	public function setAttributes($attrs) {
diff --git a/forms/gridfield/GridFieldPageCount.php b/forms/gridfield/GridFieldPageCount.php
index 380dc2490..26a305b33 100755
--- a/forms/gridfield/GridFieldPageCount.php
+++ b/forms/gridfield/GridFieldPageCount.php
@@ -16,14 +16,7 @@ class GridFieldPageCount implements GridField_HTMLProvider {
 	protected $targetFragment;
 
 	/**
-	 * Which template to use for rendering
-	 *
-	 * @var string
-	 */
-	protected $itemClass = 'GridFieldPageCount';
-
-	/**
-	 * @param string $targetFrament The fragment indicating the placement of this page count
+	 * @param string $targetFragment The fragment indicating the placement of this page count
 	 */
 	public function __construct($targetFragment = 'before') {
 		$this->targetFragment = $targetFragment;
@@ -62,14 +55,16 @@ class GridFieldPageCount implements GridField_HTMLProvider {
 	 * @return array
 	 */
 	public function getHTMLFragments($gridField) {
-
 		// Retrieve paging parameters from the directing paginator component
 		$paginator = $this->getPaginator($gridField);
 		if ($paginator && ($forTemplate = $paginator->getTemplateParameters($gridField))) {
+			$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
 			return array(
-				$this->targetFragment => $forTemplate->renderWith('Includes/'.$this->itemClass)
+				$this->targetFragment => $forTemplate->renderWith($template)
 			);
 		}
+
+		return null;
 	}
 
 }
diff --git a/forms/gridfield/GridFieldPaginator.php b/forms/gridfield/GridFieldPaginator.php
index c3efe381b..9f1b89d39 100755
--- a/forms/gridfield/GridFieldPaginator.php
+++ b/forms/gridfield/GridFieldPaginator.php
@@ -25,13 +25,6 @@ class GridFieldPaginator implements GridField_HTMLProvider, GridField_DataManipu
 	 */
 	protected $itemsPerPage;
 
-	/**
-	 * Which template to use for rendering
-	 *
-	 * @var string
-	 */
-	protected $itemClass = 'GridFieldPaginator_Row';
-
 	/**
 	 * See {@link setThrowExceptionOnBadDataType()}
 	 */
@@ -255,18 +248,22 @@ class GridFieldPaginator implements GridField_HTMLProvider, GridField_DataManipu
 	 * @return array
 	 */
 	public function getHTMLFragments($gridField) {
-
 		$forTemplate = $this->getTemplateParameters($gridField);
-		if($forTemplate) {
-			return array(
-				'footer' => $forTemplate->renderWith('Includes/'.$this->itemClass,
-					array('Colspan'=>count($gridField->getColumns())))
-			);
+		if(!$forTemplate) {
+			return null;
 		}
+		$template = SSViewer::get_templates_by_class($this, '_Row', __CLASS__);
+		return array(
+			'footer' => $forTemplate->renderWith(
+				$template,
+				array('Colspan' => count($gridField->getColumns()))
+			)
+		);
 	}
 
 	/**
-	 * @param Int
+	 * @param int $num
+	 * @return $this
 	 */
 	public function setItemsPerPage($num) {
 		$this->itemsPerPage = $num;
diff --git a/forms/gridfield/GridFieldPrintButton.php b/forms/gridfield/GridFieldPrintButton.php
index 0b0ef58d2..ba2a741c8 100644
--- a/forms/gridfield/GridFieldPrintButton.php
+++ b/forms/gridfield/GridFieldPrintButton.php
@@ -121,8 +121,10 @@ class GridFieldPrintButton implements GridField_HTMLProvider, GridField_ActionPr
 		Requirements::css(FRAMEWORK_DIR . '/client/dist/styles/GridField_print.css');
 
 		if($data = $this->generatePrintData($gridField)){
-			return $data->renderWith("GridField_print");
+			return $data->renderWith(get_class($gridField)."_print");
 		}
+
+		return null;
 	}
 
 	/**
diff --git a/forms/gridfield/GridFieldSortableHeader.php b/forms/gridfield/GridFieldSortableHeader.php
index 1078104dd..b8d4a6fa2 100644
--- a/forms/gridfield/GridFieldSortableHeader.php
+++ b/forms/gridfield/GridFieldSortableHeader.php
@@ -163,8 +163,9 @@ class GridFieldSortableHeader implements GridField_HTMLProvider, GridField_DataM
 			$forTemplate->Fields->push($field);
 		}
 
+		$template = SSViewer::get_templates_by_class($this, '_Row', __CLASS__);
 		return array(
-			'header' => $forTemplate->renderWith('Includes/GridFieldSortableHeader_Row'),
+			'header' => $forTemplate->renderWith($template),
 		);
 	}
 
diff --git a/forms/gridfield/GridFieldToolbarHeader.php b/forms/gridfield/GridFieldToolbarHeader.php
index 3f8296d98..d8a5586ab 100644
--- a/forms/gridfield/GridFieldToolbarHeader.php
+++ b/forms/gridfield/GridFieldToolbarHeader.php
@@ -11,9 +11,14 @@
  */
 class GridFieldToolbarHeader implements GridField_HTMLProvider {
 
-	public function getHTMLFragments( $gridField) {
+	/**
+	 * @param GridField $gridField
+	 * @return array
+     */
+	public function getHTMLFragments($gridField) {
+		$templates = SSViewer::get_templates_by_class($this, '', __CLASS__);
 		return array(
-			'header' => $gridField->renderWith('Includes/GridFieldToolbarHeader')
+			'header' => $gridField->renderWith($templates)
 		);
 	}
 }
diff --git a/forms/gridfield/GridFieldViewButton.php b/forms/gridfield/GridFieldViewButton.php
index f4494f6b3..eb2e1a437 100644
--- a/forms/gridfield/GridFieldViewButton.php
+++ b/forms/gridfield/GridFieldViewButton.php
@@ -10,7 +10,9 @@
 class GridFieldViewButton implements GridField_ColumnProvider {
 
 	public function augmentColumns($field, &$cols) {
-		if(!in_array('Actions', $cols)) $cols[] = 'Actions';
+		if(!in_array('Actions', $cols)) {
+			$cols[] = 'Actions';
+		}
 	}
 
 	public function getColumnsHandled($field) {
@@ -18,12 +20,14 @@ class GridFieldViewButton implements GridField_ColumnProvider {
 	}
 
 	public function getColumnContent($field, $record, $col) {
-		if($record->canView()) {
-			$data = new ArrayData(array(
-				'Link' => Controller::join_links($field->Link('item'), $record->ID, 'view')
-			));
-			return $data->renderWith('Includes/GridFieldViewButton');
+		if(!$record->canView()) {
+			return null;
 		}
+		$data = new ArrayData(array(
+			'Link' => Controller::join_links($field->Link('item'), $record->ID, 'view')
+		));
+		$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
+		return $data->renderWith($template);
 	}
 
 	public function getColumnAttributes($field, $record, $col) {
diff --git a/templates/forms/AssetField.ss b/templates/AssetField.ss
similarity index 100%
rename from templates/forms/AssetField.ss
rename to templates/AssetField.ss
diff --git a/templates/forms/AssetUploadField.ss b/templates/AssetUploadField.ss
similarity index 100%
rename from templates/forms/AssetUploadField.ss
rename to templates/AssetUploadField.ss
diff --git a/templates/forms/CheckboxField.ss b/templates/CheckboxField.ss
similarity index 100%
rename from templates/forms/CheckboxField.ss
rename to templates/CheckboxField.ss
diff --git a/templates/forms/CheckboxField_holder.ss b/templates/CheckboxField_holder.ss
similarity index 100%
rename from templates/forms/CheckboxField_holder.ss
rename to templates/CheckboxField_holder.ss
diff --git a/templates/forms/CheckboxField_holder_small.ss b/templates/CheckboxField_holder_small.ss
similarity index 100%
rename from templates/forms/CheckboxField_holder_small.ss
rename to templates/CheckboxField_holder_small.ss
diff --git a/templates/forms/CheckboxSetField.ss b/templates/CheckboxSetField.ss
similarity index 100%
rename from templates/forms/CheckboxSetField.ss
rename to templates/CheckboxSetField.ss
diff --git a/templates/forms/CompositeField.ss b/templates/CompositeField.ss
similarity index 100%
rename from templates/forms/CompositeField.ss
rename to templates/CompositeField.ss
diff --git a/templates/forms/CompositeField_holder.ss b/templates/CompositeField_holder.ss
similarity index 100%
rename from templates/forms/CompositeField_holder.ss
rename to templates/CompositeField_holder.ss
diff --git a/templates/forms/CompositeField_holder_small.ss b/templates/CompositeField_holder_small.ss
similarity index 100%
rename from templates/forms/CompositeField_holder_small.ss
rename to templates/CompositeField_holder_small.ss
diff --git a/templates/forms/CreditCardField.ss b/templates/CreditCardField.ss
similarity index 100%
rename from templates/forms/CreditCardField.ss
rename to templates/CreditCardField.ss
diff --git a/templates/forms/DatetimeField.ss b/templates/DatetimeField.ss
similarity index 100%
rename from templates/forms/DatetimeField.ss
rename to templates/DatetimeField.ss
diff --git a/templates/forms/DropdownField.ss b/templates/DropdownField.ss
similarity index 100%
rename from templates/forms/DropdownField.ss
rename to templates/DropdownField.ss
diff --git a/templates/forms/FieldGroup.ss b/templates/FieldGroup.ss
similarity index 100%
rename from templates/forms/FieldGroup.ss
rename to templates/FieldGroup.ss
diff --git a/templates/forms/FieldGroup_DefaultFieldHolder.ss b/templates/FieldGroup_DefaultFieldHolder.ss
similarity index 100%
rename from templates/forms/FieldGroup_DefaultFieldHolder.ss
rename to templates/FieldGroup_DefaultFieldHolder.ss
diff --git a/templates/forms/FieldGroup_holder.ss b/templates/FieldGroup_holder.ss
similarity index 100%
rename from templates/forms/FieldGroup_holder.ss
rename to templates/FieldGroup_holder.ss
diff --git a/templates/forms/FileField.ss b/templates/FileField.ss
similarity index 100%
rename from templates/forms/FileField.ss
rename to templates/FileField.ss
diff --git a/templates/forms/FormAction.ss b/templates/FormAction.ss
similarity index 100%
rename from templates/forms/FormAction.ss
rename to templates/FormAction.ss
diff --git a/templates/forms/FormField.ss b/templates/FormField.ss
similarity index 100%
rename from templates/forms/FormField.ss
rename to templates/FormField.ss
diff --git a/templates/forms/FormField_holder.ss b/templates/FormField_holder.ss
similarity index 100%
rename from templates/forms/FormField_holder.ss
rename to templates/FormField_holder.ss
diff --git a/templates/forms/FormField_holder_small.ss b/templates/FormField_holder_small.ss
similarity index 100%
rename from templates/forms/FormField_holder_small.ss
rename to templates/FormField_holder_small.ss
diff --git a/templates/forms/GroupedDropdownField.ss b/templates/GroupedDropdownField.ss
similarity index 100%
rename from templates/forms/GroupedDropdownField.ss
rename to templates/GroupedDropdownField.ss
diff --git a/templates/forms/HTMLEditorField_UploadField.ss b/templates/HTMLEditorField_UploadField.ss
similarity index 100%
rename from templates/forms/HTMLEditorField_UploadField.ss
rename to templates/HTMLEditorField_UploadField.ss
diff --git a/templates/forms/HTMLReadonlyField.ss b/templates/HTMLReadonlyField.ss
similarity index 100%
rename from templates/forms/HTMLReadonlyField.ss
rename to templates/HTMLReadonlyField.ss
diff --git a/templates/forms/HeaderField.ss b/templates/HeaderField.ss
similarity index 100%
rename from templates/forms/HeaderField.ss
rename to templates/HeaderField.ss
diff --git a/templates/forms/HiddenField.ss b/templates/HiddenField.ss
similarity index 100%
rename from templates/forms/HiddenField.ss
rename to templates/HiddenField.ss
diff --git a/templates/Includes/GridFieldItemEditView.ss b/templates/Includes/GridFieldItemEditView.ss
deleted file mode 100644
index 4e8a1b99b..000000000
--- a/templates/Includes/GridFieldItemEditView.ss
+++ /dev/null
@@ -1,5 +0,0 @@
-<% if Backlink %>
-	<a href="$Backlink"><%t GridFieldItemEditView.Go_back 'Go back' %></a>
-<% end_if %>
-
-$ItemEditForm
diff --git a/templates/forms/LabelField.ss b/templates/LabelField.ss
similarity index 100%
rename from templates/forms/LabelField.ss
rename to templates/LabelField.ss
diff --git a/templates/forms/ListboxField.ss b/templates/ListboxField.ss
similarity index 100%
rename from templates/forms/ListboxField.ss
rename to templates/ListboxField.ss
diff --git a/templates/forms/LookupField.ss b/templates/LookupField.ss
similarity index 100%
rename from templates/forms/LookupField.ss
rename to templates/LookupField.ss
diff --git a/templates/forms/MemberDatetimeOptionsetField.ss b/templates/MemberDatetimeOptionsetField.ss
similarity index 100%
rename from templates/forms/MemberDatetimeOptionsetField.ss
rename to templates/MemberDatetimeOptionsetField.ss
diff --git a/templates/forms/MemberDatetimeOptionsetField_description_date.ss b/templates/MemberDatetimeOptionsetField_description_date.ss
similarity index 100%
rename from templates/forms/MemberDatetimeOptionsetField_description_date.ss
rename to templates/MemberDatetimeOptionsetField_description_date.ss
diff --git a/templates/forms/MemberDatetimeOptionsetField_description_time.ss b/templates/MemberDatetimeOptionsetField_description_time.ss
similarity index 100%
rename from templates/forms/MemberDatetimeOptionsetField_description_time.ss
rename to templates/MemberDatetimeOptionsetField_description_time.ss
diff --git a/templates/forms/MoneyField.ss b/templates/MoneyField.ss
similarity index 100%
rename from templates/forms/MoneyField.ss
rename to templates/MoneyField.ss
diff --git a/templates/forms/OptionsetField.ss b/templates/OptionsetField.ss
similarity index 100%
rename from templates/forms/OptionsetField.ss
rename to templates/OptionsetField.ss
diff --git a/templates/forms/OptionsetField_holder.ss b/templates/OptionsetField_holder.ss
similarity index 100%
rename from templates/forms/OptionsetField_holder.ss
rename to templates/OptionsetField_holder.ss
diff --git a/templates/forms/ReadonlyField.ss b/templates/ReadonlyField.ss
similarity index 100%
rename from templates/forms/ReadonlyField.ss
rename to templates/ReadonlyField.ss
diff --git a/templates/forms/SelectionGroup.ss b/templates/SelectionGroup.ss
similarity index 100%
rename from templates/forms/SelectionGroup.ss
rename to templates/SelectionGroup.ss
diff --git a/templates/forms/TabSet.ss b/templates/TabSet.ss
similarity index 100%
rename from templates/forms/TabSet.ss
rename to templates/TabSet.ss
diff --git a/templates/forms/TextField.ss b/templates/TextField.ss
similarity index 100%
rename from templates/forms/TextField.ss
rename to templates/TextField.ss
diff --git a/templates/forms/TextareaField.ss b/templates/TextareaField.ss
similarity index 100%
rename from templates/forms/TextareaField.ss
rename to templates/TextareaField.ss
diff --git a/templates/forms/ToggleCompositeField.ss b/templates/ToggleCompositeField.ss
similarity index 100%
rename from templates/forms/ToggleCompositeField.ss
rename to templates/ToggleCompositeField.ss
diff --git a/templates/forms/TreeDropdownField.ss b/templates/TreeDropdownField.ss
similarity index 100%
rename from templates/forms/TreeDropdownField.ss
rename to templates/TreeDropdownField.ss
diff --git a/templates/forms/UploadField.ss b/templates/UploadField.ss
similarity index 100%
rename from templates/forms/UploadField.ss
rename to templates/UploadField.ss
diff --git a/tests/api/RSSFeedTest.php b/tests/api/RSSFeedTest.php
index 2e593659f..23179ef87 100644
--- a/tests/api/RSSFeedTest.php
+++ b/tests/api/RSSFeedTest.php
@@ -76,7 +76,7 @@ class RSSFeedTest extends SapphireTest {
 		$content = $rssFeed->outputToBrowser();
 		$this->assertContains('<title>Test Custom Template</title>', $content);
 
-		$rssFeed->setTemplate('RSSFeed');
+		$rssFeed->setTemplate(null);
 		$content = $rssFeed->outputToBrowser();
 		$this->assertNotContains('<title>Test Custom Template</title>', $content);
 	}
diff --git a/tests/core/manifest/ThemeResourceLoaderTest.php b/tests/core/manifest/ThemeResourceLoaderTest.php
index f8df70355..ed99d82c0 100644
--- a/tests/core/manifest/ThemeResourceLoaderTest.php
+++ b/tests/core/manifest/ThemeResourceLoaderTest.php
@@ -123,6 +123,31 @@ class ThemeResourceLoaderTest extends SapphireTest {
 		);
 	}
 
+	public function testFindTemplatesByPath() {
+		// Items given as full paths are returned directly
+		$this->assertEquals(
+			"$this->base/themes/theme/templates/Page.ss",
+			$this->loader->findTemplate("$this->base/themes/theme/templates/Page.ss", ['theme'])
+		);
+
+		$this->assertEquals(
+			"$this->base/themes/theme/templates/Page.ss",
+			$this->loader->findTemplate([
+				"$this->base/themes/theme/templates/Page.ss",
+				"Page"
+			], ['theme'])
+		);
+
+		// Ensure checks for file_exists
+		$this->assertEquals(
+			"$this->base/themes/theme/templates/Page.ss",
+			$this->loader->findTemplate([
+				"$this->base/themes/theme/templates/NotAPage.ss",
+				"$this->base/themes/theme/templates/Page.ss",
+			], ['theme'])
+		);
+	}
+
 	/**
 	 * Test that 'main' and 'Layout' templates are loaded from set theme
 	 */
diff --git a/tests/forms/MemberDatetimeOptionsetFieldTest.php b/tests/forms/MemberDatetimeOptionsetFieldTest.php
index 59e5fb0b7..cefcafc66 100644
--- a/tests/forms/MemberDatetimeOptionsetFieldTest.php
+++ b/tests/forms/MemberDatetimeOptionsetFieldTest.php
@@ -110,7 +110,7 @@ class MemberDatetimeOptionsetFieldTest extends SapphireTest {
 		$field->setDescription('Test description');
 		$this->assertEquals('Test description', $field->getDescription());
 
-		$field->setDescriptionTemplate('forms/MemberDatetimeOptionsetField_description_time');
+		$field->setDescriptionTemplate('MemberDatetimeOptionsetField_description_time');
 		$this->assertNotEmpty($field->getDescription());
 		$this->assertNotEquals('Test description', $field->getDescription());
 	}
diff --git a/tests/view/SSViewerTest.php b/tests/view/SSViewerTest.php
index c6602e861..f5ec8230e 100644
--- a/tests/view/SSViewerTest.php
+++ b/tests/view/SSViewerTest.php
@@ -1154,22 +1154,57 @@ after')
 		$this->useTestTheme(dirname(__FILE__), 'layouttest', function() use ($self) {
 			// Test passing a string
 			$templates = SSViewer::get_templates_by_class(
-				'TestNamespace\SSViewerTestModel_Controller',
+				'TestNamespace\\SSViewerTestModel_Controller',
 				'',
 				'Controller'
 			);
 			$self->assertEquals([
-				'TestNamespace\SSViewerTestModel_Controller',
+				'TestNamespace\\SSViewerTestModel_Controller',
+				[
+					'type' => 'Includes',
+					'TestNamespace\\SSViewerTestModel_Controller',
+				],
+				'TestNamespace\\SSViewerTestModel',
     			'Controller',
+				[
+					'type' => 'Includes',
+    				'Controller',
+				],
 			], $templates);
 
 			// Test to ensure we're stopping at the base class.
-			$templates = SSViewer::get_templates_by_class('TestNamespace\SSViewerTestModel_Controller', '', 'TestNamespace\SSViewerTestModel_Controller');
-			$self->assertCount(1, $templates);
+			$templates = SSViewer::get_templates_by_class(
+				'TestNamespace\SSViewerTestModel_Controller',
+				'',
+				'TestNamespace\SSViewerTestModel_Controller'
+			);
+			$self->assertEquals([
+				'TestNamespace\\SSViewerTestModel_Controller',
+				[
+					'type' => 'Includes',
+					'TestNamespace\\SSViewerTestModel_Controller',
+				],
+				'TestNamespace\\SSViewerTestModel',
+			], $templates);
 
-			// Make sure we can filter our templates by suffix.
-			$templates = SSViewer::get_templates_by_class('TestNamespace\SSViewerTestModel', '_Controller');
-			$self->assertCount(1, $templates);
+			// Make sure we can search templates by suffix.
+			$templates = SSViewer::get_templates_by_class(
+				'TestNamespace\\SSViewerTestModel',
+				'_Controller',
+				'SilverStripe\\ORM\\DataObject'
+			);
+			$self->assertEquals([
+				'TestNamespace\\SSViewerTestModel_Controller',
+				[
+					'type' => 'Includes',
+					'TestNamespace\\SSViewerTestModel_Controller',
+				],
+				'SilverStripe\\ORM\\DataObject_Controller',
+				[
+					'type' => 'Includes',
+					'SilverStripe\\ORM\\DataObject_Controller',
+				],
+			], $templates);
 
 			// Let's throw something random in there.
 			$self->setExpectedException('InvalidArgumentException');
diff --git a/view/SSViewer.php b/view/SSViewer.php
index 818baa4ee..377cdb0ec 100644
--- a/view/SSViewer.php
+++ b/view/SSViewer.php
@@ -859,51 +859,52 @@ class SSViewer implements Flushable {
 	}
 
 	/**
-	 * Traverses the given the given class context looking for templates with the relevant name.
-	 *
-	 * @param $className string - valid class name
-	 * @param $suffix string
-	 * @param $baseClass string
+	 * Traverses the given the given class context looking for candidate template names
+	 * which match each item in the class hierarchy. The resulting list of template candidates
+	 * may or may not exist, but you can invoke {@see SSViewer::chooseTemplate} on any list
+	 * to determine the best candidate based on the current themes.
 	 *
+	 * @param string|object $classOrObject Valid class name, or object
+	 * @param string $suffix
+	 * @param string $baseClass Class to halt ancestry search at
 	 * @return array
 	 */
-	public static function get_templates_by_class($className, $suffix = '', $baseClass = null) {
+	public static function get_templates_by_class($classOrObject, $suffix = '', $baseClass = null) {
 		// Figure out the class name from the supplied context.
-		if(!is_string($className) || !class_exists($className)) {
+		if (!is_object($classOrObject) && !(
+			is_string($classOrObject) && class_exists($classOrObject)
+		)) {
 			throw new InvalidArgumentException(
 				'SSViewer::get_templates_by_class() expects a valid class name as its first parameter.'
 			);
 		}
 		$templates = array();
-		$classes = array_reverse(ClassInfo::ancestry($className));
+		$classes = array_reverse(ClassInfo::ancestry($classOrObject));
 		foreach($classes as $class) {
 			$template = $class . $suffix;
-			if(SSViewer::hasTemplate($template)) {
-				$templates[] = $template;
-			} elseif(SSViewer::hasTemplate($template = ['type' => 'Includes', $template])) {
-				$templates[] = $template;
-			}
+			$templates[] = $template;
+			$templates[] = ['type' => 'Includes', $template];
 
 			// If the class is "Page_Controller", look for Page.ss
-			if(stripos($class,'_controller') !== false) {
-				$template = str_ireplace('_controller','',$class) . $suffix;
-				if(SSViewer::hasTemplate($template)) {
-					$templates[] = $template;
-				}
+			if (stripos($class, '_controller') !== false) {
+				$templates[] = str_ireplace('_controller', '', $class) . $suffix;
 			}
 
-			if($baseClass && $class == $baseClass) break;
+			if($baseClass && $class == $baseClass) {
+				break;
+			}
 		}
 		return $templates;
 	}
 
 	/**
-	 * @param string|array $templateList If passed as a string with .ss extension, used as the "main" template.
+	 * @param string|array $templates If passed as a string with .ss extension, used as the "main" template.
 	 *  If passed as an array, it can be used for template inheritance (first found template "wins").
 	 *  Usually the array values are PHP class names, which directly correlate to template names.
 	 *  <code>
 	 *  array('MySpecificPage', 'MyPage', 'Page')
 	 *  </code>
+	 * @param TemplateParser $parser
 	 */
 	public function __construct($templates, TemplateParser $parser = null) {
 		if ($parser) {
@@ -929,10 +930,20 @@ class SSViewer implements Flushable {
 
 	public function setTemplate($templates) {
 		$this->templates = $templates;
-		$this->chosen = ThemeResourceLoader::instance()->findTemplate($templates, self::get_themes());
+		$this->chosen = $this->chooseTemplate($templates);
 		$this->subTemplates = [];
 	}
 
+	/**
+	 * Find the template to use for a given list
+	 *
+	 * @param array|string $templates
+	 * @return string
+	 */
+	public static function chooseTemplate($templates) {
+		return ThemeResourceLoader::instance()->findTemplate($templates, self::get_themes());
+	}
+
 	/**
 	 * Set the template parser that will be used in template generation
 	 * @param \TemplateParser $parser
diff --git a/view/ThemeResourceLoader.php b/view/ThemeResourceLoader.php
index 2dfbe7500..0098712d7 100644
--- a/view/ThemeResourceLoader.php
+++ b/view/ThemeResourceLoader.php
@@ -155,13 +155,6 @@ class ThemeResourceLoader {
 			$templateList = array($template);
 		}
 
-		// If we have an .ss extension, this is a path, not a template name. We should
-		// pass in templates without extensions in order for template manifest to find
-		// files dynamically.
-		if(count($templateList) == 1 && is_string($templateList[0]) && substr($templateList[0], -3) == '.ss') {
-			return $templateList[0];
-		}
-
 		foreach($templateList as $i => $template) {
 			// Check if passed list of templates in array format
 			if (is_array($template)) {
@@ -172,6 +165,13 @@ class ThemeResourceLoader {
 				continue;
 			}
 
+			// If we have an .ss extension, this is a path, not a template name. We should
+			// pass in templates without extensions in order for template manifest to find
+			// files dynamically.
+			if(substr($template, -3) == '.ss' && file_exists($template)) {
+				return $template;
+			}
+
 			// Check string template identifier
 			$template = str_replace('\\', '/', $template);
 			$parts = explode('/', $template);