D14390.diff
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	diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
	--- a/src/__phutil_library_map__.php
	+++ b/src/__phutil_library_map__.php
	@@ -1570,6 +1570,7 @@
	'PhabricatorApplicationDatasource' => 'applications/meta/typeahead/PhabricatorApplicationDatasource.php',
	'PhabricatorApplicationDetailViewController' => 'applications/meta/controller/PhabricatorApplicationDetailViewController.php',
	'PhabricatorApplicationEditController' => 'applications/meta/controller/PhabricatorApplicationEditController.php',
	+ 'PhabricatorApplicationEditEngine' => 'applications/transactions/editengine/PhabricatorApplicationEditEngine.php',
	'PhabricatorApplicationEmailCommandsController' => 'applications/meta/controller/PhabricatorApplicationEmailCommandsController.php',
	'PhabricatorApplicationLaunchView' => 'applications/meta/view/PhabricatorApplicationLaunchView.php',
	'PhabricatorApplicationPanelController' => 'applications/meta/controller/PhabricatorApplicationPanelController.php',
	@@ -2063,6 +2064,7 @@
	'PhabricatorDataCacheSpec' => 'applications/cache/spec/PhabricatorDataCacheSpec.php',
	'PhabricatorDataNotAttachedException' => 'infrastructure/storage/lisk/PhabricatorDataNotAttachedException.php',
	'PhabricatorDatabaseSetupCheck' => 'applications/config/check/PhabricatorDatabaseSetupCheck.php',
	+ 'PhabricatorDatasourceEditField' => 'applications/transactions/editfield/PhabricatorDatasourceEditField.php',
	'PhabricatorDateTimeSettingsPanel' => 'applications/settings/panel/PhabricatorDateTimeSettingsPanel.php',
	'PhabricatorDebugController' => 'applications/system/controller/PhabricatorDebugController.php',
	'PhabricatorDefaultRequestExceptionHandler' => 'aphront/handler/PhabricatorDefaultRequestExceptionHandler.php',
	@@ -2097,6 +2099,7 @@
	'PhabricatorEdgeTestCase' => 'infrastructure/edges/__tests__/PhabricatorEdgeTestCase.php',
	'PhabricatorEdgeType' => 'infrastructure/edges/type/PhabricatorEdgeType.php',
	'PhabricatorEdgeTypeTestCase' => 'infrastructure/edges/type/__tests__/PhabricatorEdgeTypeTestCase.php',
	+ 'PhabricatorEditField' => 'applications/transactions/editfield/PhabricatorEditField.php',
	'PhabricatorEditor' => 'infrastructure/PhabricatorEditor.php',
	'PhabricatorElasticSearchEngine' => 'applications/search/engine/PhabricatorElasticSearchEngine.php',
	'PhabricatorElasticSearchSetupCheck' => 'applications/config/check/PhabricatorElasticSearchSetupCheck.php',
	@@ -2554,6 +2557,7 @@
	'PhabricatorPasteController' => 'applications/paste/controller/PhabricatorPasteController.php',
	'PhabricatorPasteDAO' => 'applications/paste/storage/PhabricatorPasteDAO.php',
	'PhabricatorPasteEditController' => 'applications/paste/controller/PhabricatorPasteEditController.php',
	+ 'PhabricatorPasteEditEngine' => 'applications/paste/editor/PhabricatorPasteEditEngine.php',
	'PhabricatorPasteEditor' => 'applications/paste/editor/PhabricatorPasteEditor.php',
	'PhabricatorPasteListController' => 'applications/paste/controller/PhabricatorPasteListController.php',
	'PhabricatorPastePastePHIDType' => 'applications/paste/phid/PhabricatorPastePastePHIDType.php',
	@@ -2654,6 +2658,7 @@
	'PhabricatorPolicyDAO' => 'applications/policy/storage/PhabricatorPolicyDAO.php',
	'PhabricatorPolicyDataTestCase' => 'applications/policy/__tests__/PhabricatorPolicyDataTestCase.php',
	'PhabricatorPolicyEditController' => 'applications/policy/controller/PhabricatorPolicyEditController.php',
	+ 'PhabricatorPolicyEditField' => 'applications/transactions/editfield/PhabricatorPolicyEditField.php',
	'PhabricatorPolicyException' => 'applications/policy/exception/PhabricatorPolicyException.php',
	'PhabricatorPolicyExplainController' => 'applications/policy/controller/PhabricatorPolicyExplainController.php',
	'PhabricatorPolicyFilter' => 'applications/policy/filter/PhabricatorPolicyFilter.php',
	@@ -2917,6 +2922,7 @@
	'PhabricatorSearchWorker' => 'applications/search/worker/PhabricatorSearchWorker.php',
	'PhabricatorSecurityConfigOptions' => 'applications/config/option/PhabricatorSecurityConfigOptions.php',
	'PhabricatorSecuritySetupCheck' => 'applications/config/check/PhabricatorSecuritySetupCheck.php',
	+ 'PhabricatorSelectEditField' => 'applications/transactions/editfield/PhabricatorSelectEditField.php',
	'PhabricatorSendGridConfigOptions' => 'applications/config/option/PhabricatorSendGridConfigOptions.php',
	'PhabricatorSessionsSettingsPanel' => 'applications/settings/panel/PhabricatorSessionsSettingsPanel.php',
	'PhabricatorSettingsAddEmailAction' => 'applications/settings/action/PhabricatorSettingsAddEmailAction.php',
	@@ -2957,6 +2963,7 @@
	'PhabricatorSlugTestCase' => 'infrastructure/util/__tests__/PhabricatorSlugTestCase.php',
	'PhabricatorSortTableUIExample' => 'applications/uiexample/examples/PhabricatorSortTableUIExample.php',
	'PhabricatorSourceCodeView' => 'view/layout/PhabricatorSourceCodeView.php',
	+ 'PhabricatorSpaceEditField' => 'applications/transactions/editfield/PhabricatorSpaceEditField.php',
	'PhabricatorSpacesApplication' => 'applications/spaces/application/PhabricatorSpacesApplication.php',
	'PhabricatorSpacesArchiveController' => 'applications/spaces/controller/PhabricatorSpacesArchiveController.php',
	'PhabricatorSpacesCapabilityCreateSpaces' => 'applications/spaces/capability/PhabricatorSpacesCapabilityCreateSpaces.php',
	@@ -3063,6 +3070,8 @@
	'PhabricatorTestNoCycleEdgeType' => 'applications/transactions/edges/PhabricatorTestNoCycleEdgeType.php',
	'PhabricatorTestStorageEngine' => 'applications/files/engine/PhabricatorTestStorageEngine.php',
	'PhabricatorTestWorker' => 'infrastructure/daemon/workers/__tests__/PhabricatorTestWorker.php',
	+ 'PhabricatorTextAreaEditField' => 'applications/transactions/editfield/PhabricatorTextAreaEditField.php',
	+ 'PhabricatorTextEditField' => 'applications/transactions/editfield/PhabricatorTextEditField.php',
	'PhabricatorTime' => 'infrastructure/time/PhabricatorTime.php',
	'PhabricatorTimeGuard' => 'infrastructure/time/PhabricatorTimeGuard.php',
	'PhabricatorTimeTestCase' => 'infrastructure/time/__tests__/PhabricatorTimeTestCase.php',
	@@ -3084,6 +3093,7 @@
	'PhabricatorTokenReceiverQuery' => 'applications/tokens/query/PhabricatorTokenReceiverQuery.php',
	'PhabricatorTokenTokenPHIDType' => 'applications/tokens/phid/PhabricatorTokenTokenPHIDType.php',
	'PhabricatorTokenUIEventListener' => 'applications/tokens/event/PhabricatorTokenUIEventListener.php',
	+ 'PhabricatorTokenizerEditField' => 'applications/transactions/editfield/PhabricatorTokenizerEditField.php',
	'PhabricatorTokensApplication' => 'applications/tokens/application/PhabricatorTokensApplication.php',
	'PhabricatorTokensSettingsPanel' => 'applications/settings/panel/PhabricatorTokensSettingsPanel.php',
	'PhabricatorTooltipUIExample' => 'applications/uiexample/examples/PhabricatorTooltipUIExample.php',
	@@ -5489,6 +5499,7 @@
	'PhabricatorApplicationDatasource' => 'PhabricatorTypeaheadDatasource',
	'PhabricatorApplicationDetailViewController' => 'PhabricatorApplicationsController',
	'PhabricatorApplicationEditController' => 'PhabricatorApplicationsController',
	+ 'PhabricatorApplicationEditEngine' => 'Phobject',
	'PhabricatorApplicationEmailCommandsController' => 'PhabricatorApplicationsController',
	'PhabricatorApplicationLaunchView' => 'AphrontTagView',
	'PhabricatorApplicationPanelController' => 'PhabricatorApplicationsController',
	@@ -6080,6 +6091,7 @@
	'PhabricatorDataCacheSpec' => 'PhabricatorCacheSpec',
	'PhabricatorDataNotAttachedException' => 'Exception',
	'PhabricatorDatabaseSetupCheck' => 'PhabricatorSetupCheck',
	+ 'PhabricatorDatasourceEditField' => 'PhabricatorTokenizerEditField',
	'PhabricatorDateTimeSettingsPanel' => 'PhabricatorSettingsPanel',
	'PhabricatorDebugController' => 'PhabricatorController',
	'PhabricatorDefaultRequestExceptionHandler' => 'PhabricatorRequestExceptionHandler',
	@@ -6113,6 +6125,7 @@
	'PhabricatorEdgeTestCase' => 'PhabricatorTestCase',
	'PhabricatorEdgeType' => 'Phobject',
	'PhabricatorEdgeTypeTestCase' => 'PhabricatorTestCase',
	+ 'PhabricatorEditField' => 'Phobject',
	'PhabricatorEditor' => 'Phobject',
	'PhabricatorElasticSearchEngine' => 'PhabricatorSearchEngine',
	'PhabricatorElasticSearchSetupCheck' => 'PhabricatorSetupCheck',
	@@ -6647,6 +6660,7 @@
	'PhabricatorPasteController' => 'PhabricatorController',
	'PhabricatorPasteDAO' => 'PhabricatorLiskDAO',
	'PhabricatorPasteEditController' => 'PhabricatorPasteController',
	+ 'PhabricatorPasteEditEngine' => 'PhabricatorApplicationEditEngine',
	'PhabricatorPasteEditor' => 'PhabricatorApplicationTransactionEditor',
	'PhabricatorPasteListController' => 'PhabricatorPasteController',
	'PhabricatorPastePastePHIDType' => 'PhabricatorPHIDType',
	@@ -6762,6 +6776,7 @@
	'PhabricatorPolicyDAO' => 'PhabricatorLiskDAO',
	'PhabricatorPolicyDataTestCase' => 'PhabricatorTestCase',
	'PhabricatorPolicyEditController' => 'PhabricatorPolicyController',
	+ 'PhabricatorPolicyEditField' => 'PhabricatorEditField',
	'PhabricatorPolicyException' => 'Exception',
	'PhabricatorPolicyExplainController' => 'PhabricatorPolicyController',
	'PhabricatorPolicyFilter' => 'Phobject',
	@@ -7090,6 +7105,7 @@
	'PhabricatorSearchWorker' => 'PhabricatorWorker',
	'PhabricatorSecurityConfigOptions' => 'PhabricatorApplicationConfigOptions',
	'PhabricatorSecuritySetupCheck' => 'PhabricatorSetupCheck',
	+ 'PhabricatorSelectEditField' => 'PhabricatorEditField',
	'PhabricatorSendGridConfigOptions' => 'PhabricatorApplicationConfigOptions',
	'PhabricatorSessionsSettingsPanel' => 'PhabricatorSettingsPanel',
	'PhabricatorSettingsAddEmailAction' => 'PhabricatorSystemAction',
	@@ -7140,6 +7156,7 @@
	'PhabricatorSlugTestCase' => 'PhabricatorTestCase',
	'PhabricatorSortTableUIExample' => 'PhabricatorUIExample',
	'PhabricatorSourceCodeView' => 'AphrontView',
	+ 'PhabricatorSpaceEditField' => 'PhabricatorEditField',
	'PhabricatorSpacesApplication' => 'PhabricatorApplication',
	'PhabricatorSpacesArchiveController' => 'PhabricatorSpacesController',
	'PhabricatorSpacesCapabilityCreateSpaces' => 'PhabricatorPolicyCapability',
	@@ -7252,6 +7269,8 @@
	'PhabricatorTestNoCycleEdgeType' => 'PhabricatorEdgeType',
	'PhabricatorTestStorageEngine' => 'PhabricatorFileStorageEngine',
	'PhabricatorTestWorker' => 'PhabricatorWorker',
	+ 'PhabricatorTextAreaEditField' => 'PhabricatorEditField',
	+ 'PhabricatorTextEditField' => 'PhabricatorEditField',
	'PhabricatorTime' => 'Phobject',
	'PhabricatorTimeGuard' => 'Phobject',
	'PhabricatorTimeTestCase' => 'PhabricatorTestCase',
	@@ -7278,6 +7297,7 @@
	'PhabricatorTokenReceiverQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
	'PhabricatorTokenTokenPHIDType' => 'PhabricatorPHIDType',
	'PhabricatorTokenUIEventListener' => 'PhabricatorEventListener',
	+ 'PhabricatorTokenizerEditField' => 'PhabricatorEditField',
	'PhabricatorTokensApplication' => 'PhabricatorApplication',
	'PhabricatorTokensSettingsPanel' => 'PhabricatorSettingsPanel',
	'PhabricatorTooltipUIExample' => 'PhabricatorUIExample',
	diff --git a/src/applications/base/controller/PhabricatorController.php b/src/applications/base/controller/PhabricatorController.php
	--- a/src/applications/base/controller/PhabricatorController.php
	+++ b/src/applications/base/controller/PhabricatorController.php
	@@ -521,6 +521,14 @@
	}


	+ public function buildApplicationCrumbsForEditEngine() {
	+ // TODO: This is kind of gross, I'm bascially just making this public so
	+ // I can use it in EditEngine. We could do this without making it public
	+ // by using controller delegation, or make it properly public.
	+ return $this->buildApplicationCrumbs();
	+ }
	+
	+
	/* -( Deprecated )--------------------------------------------------------- */


	diff --git a/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php b/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
	--- a/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
	+++ b/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
	@@ -44,16 +44,11 @@

	$paste = PhabricatorPaste::initializeNewPaste($viewer);

	- $file = PhabricatorPasteEditor::initializeFileForPaste(
	- $viewer,
	- $title,
	- $content);
	-
	$xactions = array();

	$xactions[] = id(new PhabricatorPasteTransaction())
	->setTransactionType(PhabricatorPasteTransaction::TYPE_CONTENT)
	- ->setNewValue($file->getPHID());
	+ ->setNewValue($content);

	$xactions[] = id(new PhabricatorPasteTransaction())
	->setTransactionType(PhabricatorPasteTransaction::TYPE_TITLE)
	diff --git a/src/applications/paste/controller/PhabricatorPasteEditController.php b/src/applications/paste/controller/PhabricatorPasteEditController.php
	--- a/src/applications/paste/controller/PhabricatorPasteEditController.php
	+++ b/src/applications/paste/controller/PhabricatorPasteEditController.php
	@@ -3,248 +3,9 @@
	final class PhabricatorPasteEditController extends PhabricatorPasteController {

	public function handleRequest(AphrontRequest $request) {
	- $viewer = $request->getViewer();
	- $id = $request->getURIData('id');
	-
	- $parent = null;
	- $parent_id = null;
	- if (!$id) {
	- $is_create = true;
	-
	- $paste = PhabricatorPaste::initializeNewPaste($viewer);
	-
	- $parent_id = $request->getStr('parent');
	- if ($parent_id) {
	- // NOTE: If the Paste is forked from a paste which the user no longer
	- // has permission to see, we still let them edit it.
	- $parent = id(new PhabricatorPasteQuery())
	- ->setViewer($viewer)
	- ->withIDs(array($parent_id))
	- ->needContent(true)
	- ->needRawContent(true)
	- ->execute();
	- $parent = head($parent);
	-
	- if ($parent) {
	- $paste->setParentPHID($parent->getPHID());
	- $paste->setViewPolicy($parent->getViewPolicy());
	- }
	- }
	-
	- $paste->setAuthorPHID($viewer->getPHID());
	- $paste->attachRawContent('');
	- } else {
	- $is_create = false;
	-
	- $paste = id(new PhabricatorPasteQuery())
	- ->setViewer($viewer)
	- ->requireCapabilities(
	- array(
	- PhabricatorPolicyCapability::CAN_VIEW,
	- PhabricatorPolicyCapability::CAN_EDIT,
	- ))
	- ->withIDs(array($id))
	- ->needRawContent(true)
	- ->executeOne();
	- if (!$paste) {
	- return new Aphront404Response();
	- }
	- }
	-
	- $v_space = $paste->getSpacePHID();
	- if ($is_create && $parent) {
	- $v_title = pht('Fork of %s', $parent->getFullName());
	- $v_language = $parent->getLanguage();
	- $v_text = $parent->getRawContent();
	- $v_space = $parent->getSpacePHID();
	- } else {
	- $v_title = $paste->getTitle();
	- $v_language = $paste->getLanguage();
	- $v_text = $paste->getRawContent();
	- }
	- $v_view_policy = $paste->getViewPolicy();
	- $v_edit_policy = $paste->getEditPolicy();
	- $v_status = $paste->getStatus();
	-
	- if ($is_create) {
	- $v_projects = array();
	- } else {
	- $v_projects = PhabricatorEdgeQuery::loadDestinationPHIDs(
	- $paste->getPHID(),
	- PhabricatorProjectObjectHasProjectEdgeType::EDGECONST);
	- $v_projects = array_reverse($v_projects);
	- }
	-
	- $validation_exception = null;
	- if ($request->isFormPost()) {
	- $xactions = array();
	-
	- $v_text = $request->getStr('text');
	- $v_title = $request->getStr('title');
	- $v_language = $request->getStr('language');
	- $v_view_policy = $request->getStr('can_view');
	- $v_edit_policy = $request->getStr('can_edit');
	- $v_projects = $request->getArr('projects');
	- $v_space = $request->getStr('spacePHID');
	- $v_status = $request->getStr('status');
	-
	- // NOTE: The author is the only editor and can always view the paste,
	- // so it's impossible for them to choose an invalid policy.
	-
	- if ($is_create \|\| ($v_text !== $paste->getRawContent())) {
	- $file = PhabricatorPasteEditor::initializeFileForPaste(
	- $viewer,
	- $v_title,
	- $v_text);
	-
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorPasteTransaction::TYPE_CONTENT)
	- ->setNewValue($file->getPHID());
	- }
	-
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorPasteTransaction::TYPE_TITLE)
	- ->setNewValue($v_title);
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorPasteTransaction::TYPE_LANGUAGE)
	- ->setNewValue($v_language);
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorTransactions::TYPE_VIEW_POLICY)
	- ->setNewValue($v_view_policy);
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorTransactions::TYPE_EDIT_POLICY)
	- ->setNewValue($v_edit_policy);
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorTransactions::TYPE_SPACE)
	- ->setNewValue($v_space);
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorPasteTransaction::TYPE_STATUS)
	- ->setNewValue($v_status);
	-
	- $proj_edge_type = PhabricatorProjectObjectHasProjectEdgeType::EDGECONST;
	- $xactions[] = id(new PhabricatorPasteTransaction())
	- ->setTransactionType(PhabricatorTransactions::TYPE_EDGE)
	- ->setMetadataValue('edge:type', $proj_edge_type)
	- ->setNewValue(array('=' => array_fuse($v_projects)));
	-
	- $editor = id(new PhabricatorPasteEditor())
	- ->setActor($viewer)
	- ->setContentSourceFromRequest($request)
	- ->setContinueOnNoEffect(true);
	-
	- try {
	- $xactions = $editor->applyTransactions($paste, $xactions);
	- return id(new AphrontRedirectResponse())->setURI($paste->getURI());
	- } catch (PhabricatorApplicationTransactionValidationException $ex) {
	- $validation_exception = $ex;
	- }
	- }
	-
	- $form = new AphrontFormView();
	-
	- $langs = array(
	- '' => pht('(Detect From Filename in Title)'),
	- ) + PhabricatorEnv::getEnvConfig('pygments.dropdown-choices');
	-
	- $form
	- ->setUser($viewer)
	- ->addHiddenInput('parent', $parent_id)
	- ->appendChild(
	- id(new AphrontFormTextControl())
	- ->setLabel(pht('Title'))
	- ->setValue($v_title)
	- ->setName('title'))
	- ->appendChild(
	- id(new AphrontFormSelectControl())
	- ->setLabel(pht('Language'))
	- ->setName('language')
	- ->setValue($v_language)
	- ->setOptions($langs));
	-
	- $policies = id(new PhabricatorPolicyQuery())
	- ->setViewer($viewer)
	- ->setObject($paste)
	- ->execute();
	-
	- $form->appendChild(
	- id(new AphrontFormPolicyControl())
	- ->setUser($viewer)
	- ->setCapability(PhabricatorPolicyCapability::CAN_VIEW)
	- ->setPolicyObject($paste)
	- ->setPolicies($policies)
	- ->setValue($v_view_policy)
	- ->setSpacePHID($v_space)
	- ->setName('can_view'));
	-
	- $form->appendChild(
	- id(new AphrontFormPolicyControl())
	- ->setUser($viewer)
	- ->setCapability(PhabricatorPolicyCapability::CAN_EDIT)
	- ->setPolicyObject($paste)
	- ->setPolicies($policies)
	- ->setValue($v_edit_policy)
	- ->setName('can_edit'));
	-
	- $form->appendChild(
	- id(new AphrontFormSelectControl())
	- ->setLabel(pht('Status'))
	- ->setName('status')
	- ->setValue($v_status)
	- ->setOptions($paste->getStatusNameMap()));
	-
	- $form->appendControl(
	- id(new AphrontFormTokenizerControl())
	- ->setLabel(pht('Projects'))
	- ->setName('projects')
	- ->setValue($v_projects)
	- ->setDatasource(new PhabricatorProjectDatasource()));
	-
	- $form
	- ->appendChild(
	- id(new AphrontFormTextAreaControl())
	- ->setLabel(pht('Text'))
	- ->setValue($v_text)
	- ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL)
	- ->setCustomClass('PhabricatorMonospaced')
	- ->setName('text'));
	-
	- $submit = new AphrontFormSubmitControl();
	-
	- if (!$is_create) {
	- $submit->addCancelButton($paste->getURI());
	- $submit->setValue(pht('Save Paste'));
	- $title = pht('Edit %s', $paste->getFullName());
	- $short = pht('Edit');
	- } else {
	- $submit->setValue(pht('Create Paste'));
	- $title = pht('Create New Paste');
	- $short = pht('Create');
	- }
	-
	- $form->appendChild($submit);
	-
	- $form_box = id(new PHUIObjectBoxView())
	- ->setHeaderText($title)
	- ->setForm($form);
	-
	- if ($validation_exception) {
	- $form_box->setValidationException($validation_exception);
	- }
	-
	- $crumbs = $this->buildApplicationCrumbs();
	- if (!$is_create) {
	- $crumbs->addTextCrumb('P'.$paste->getID(), '/P'.$paste->getID());
	- }
	- $crumbs->addTextCrumb($short);
	-
	- return $this->buildApplicationPage(
	- array(
	- $crumbs,
	- $form_box,
	- ),
	- array(
	- 'title' => $title,
	- ));
	+ return id(new PhabricatorPasteEditEngine())
	+ ->setController($this)
	+ ->buildResponse();
	}

	}
	diff --git a/src/applications/paste/controller/PhabricatorPasteViewController.php b/src/applications/paste/controller/PhabricatorPasteViewController.php
	--- a/src/applications/paste/controller/PhabricatorPasteViewController.php
	+++ b/src/applications/paste/controller/PhabricatorPasteViewController.php
	@@ -137,9 +137,7 @@
	$paste,
	PhabricatorPolicyCapability::CAN_EDIT);

	- $can_fork = $viewer->isLoggedIn();
	$id = $paste->getID();
	- $fork_uri = $this->getApplicationURI('/create/?parent='.$id);

	return id(new PhabricatorActionListView())
	->setUser($viewer)
	@@ -154,13 +152,6 @@
	->setHref($this->getApplicationURI("edit/{$id}/")))
	->addAction(
	id(new PhabricatorActionView())
	- ->setName(pht('Fork This Paste'))
	- ->setIcon('fa-code-fork')
	- ->setDisabled(!$can_fork)
	- ->setWorkflow(!$can_fork)
	- ->setHref($fork_uri))
	- ->addAction(
	- id(new PhabricatorActionView())
	->setName(pht('View Raw File'))
	->setIcon('fa-file-text-o')
	->setHref($this->getApplicationURI("raw/{$id}/")));
	diff --git a/src/applications/paste/editor/PhabricatorPasteEditEngine.php b/src/applications/paste/editor/PhabricatorPasteEditEngine.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/paste/editor/PhabricatorPasteEditEngine.php
	@@ -0,0 +1,69 @@
	+<?php
	+
	+final class PhabricatorPasteEditEngine
	+ extends PhabricatorApplicationEditEngine {
	+
	+ protected function newEditableObject() {
	+ return PhabricatorPaste::initializeNewPaste($this->getViewer());
	+ }
	+
	+ protected function newObjectQuery() {
	+ return id(new PhabricatorPasteQuery())
	+ ->needRawContent(true);
	+ }
	+
	+ protected function getObjectCreateTitleText($object) {
	+ return pht('Create New Paste');
	+ }
	+
	+ protected function getObjectEditTitleText($object) {
	+ return pht('Edit %s %s', $object->getMonogram(), $object->getTitle());
	+ }
	+
	+ protected function getObjectEditShortText($object) {
	+ return $object->getMonogram();
	+ }
	+
	+ protected function getObjectCreateShortText($object) {
	+ return pht('Create Paste');
	+ }
	+
	+ protected function getObjectViewURI($object) {
	+ return '/P'.$object->getID();
	+ }
	+
	+ protected function buildCustomEditFields($object) {
	+ $langs = array(
	+ '' => pht('(Detect From Filename in Title)'),
	+ ) + PhabricatorEnv::getEnvConfig('pygments.dropdown-choices');
	+
	+ return array(
	+ id(new PhabricatorTextEditField())
	+ ->setKey('title')
	+ ->setLabel(pht('Title'))
	+ ->setTransactionType(PhabricatorPasteTransaction::TYPE_TITLE)
	+ ->setValue($object->getTitle()),
	+ id(new PhabricatorSelectEditField())
	+ ->setKey('language')
	+ ->setLabel(pht('Language'))
	+ ->setAliases(array('lang'))
	+ ->setTransactionType(PhabricatorPasteTransaction::TYPE_LANGUAGE)
	+ ->setValue($object->getLanguage())
	+ ->setOptions($langs),
	+ id(new PhabricatorSelectEditField())
	+ ->setKey('status')
	+ ->setLabel(pht('Status'))
	+ ->setTransactionType(PhabricatorPasteTransaction::TYPE_STATUS)
	+ ->setValue($object->getStatus())
	+ ->setOptions(PhabricatorPaste::getStatusNameMap()),
	+ id(new PhabricatorTextAreaEditField())
	+ ->setKey('text')
	+ ->setLabel(pht('Text'))
	+ ->setTransactionType(PhabricatorPasteTransaction::TYPE_CONTENT)
	+ ->setMonospaced(true)
	+ ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL)
	+ ->setValue($object->getRawContent()),
	+ );
	+ }
	+
	+}
	diff --git a/src/applications/paste/editor/PhabricatorPasteEditor.php b/src/applications/paste/editor/PhabricatorPasteEditor.php
	--- a/src/applications/paste/editor/PhabricatorPasteEditor.php
	+++ b/src/applications/paste/editor/PhabricatorPasteEditor.php
	@@ -3,6 +3,8 @@
	final class PhabricatorPasteEditor
	extends PhabricatorApplicationTransactionEditor {

	+ private $fileName;
	+
	public function getEditorApplicationClass() {
	return 'PhabricatorPasteApplication';
	}
	@@ -41,6 +43,35 @@
	return $types;
	}

	+ protected function shouldApplyInitialEffects(
	+ PhabricatorLiskDAO $object,
	+ array $xactions) {
	+ return true;
	+ }
	+
	+ protected function applyInitialEffects(
	+ PhabricatorLiskDAO $object,
	+ array $xactions) {
	+
	+ // Find the most user-friendly filename we can by examining the title of
	+ // the paste and the pending transactions. We'll use this if we create a
	+ // new file to store raw content later.
	+
	+ $name = $object->getTitle();
	+ if (!strlen($name)) {
	+ $name = 'paste.raw';
	+ }
	+
	+ $type_title = PhabricatorPasteTransaction::TYPE_TITLE;
	+ foreach ($xactions as $xaction) {
	+ if ($xaction->getTransactionType() == $type_title) {
	+ $name = $xaction->getNewValue();
	+ }
	+ }
	+
	+ $this->fileName = $name;
	+ }
	+
	protected function getCustomTransactionOldValue(
	PhabricatorLiskDAO $object,
	PhabricatorApplicationTransaction $xaction) {
	@@ -62,11 +93,26 @@
	PhabricatorApplicationTransaction $xaction) {

	switch ($xaction->getTransactionType()) {
	- case PhabricatorPasteTransaction::TYPE_CONTENT:
	case PhabricatorPasteTransaction::TYPE_TITLE:
	case PhabricatorPasteTransaction::TYPE_LANGUAGE:
	case PhabricatorPasteTransaction::TYPE_STATUS:
	return $xaction->getNewValue();
	+ case PhabricatorPasteTransaction::TYPE_CONTENT:
	+ // If this transaction does not really change the paste content, return
	+ // the current file PHID so this transaction no-ops.
	+ $new_content = $xaction->getNewValue();
	+ $old_content = $object->getRawContent();
	+ $file_phid = $object->getFilePHID();
	+ if (($new_content === $old_content) && $file_phid) {
	+ return $file_phid;
	+ }
	+
	+ $file = self::initializeFileForPaste(
	+ $this->getActor(),
	+ $this->fileName,
	+ $xaction->getNewValue());
	+
	+ return $file->getPHID();
	}
	}

	diff --git a/src/applications/paste/mail/PasteCreateMailReceiver.php b/src/applications/paste/mail/PasteCreateMailReceiver.php
	--- a/src/applications/paste/mail/PasteCreateMailReceiver.php
	+++ b/src/applications/paste/mail/PasteCreateMailReceiver.php
	@@ -21,16 +21,11 @@
	$title = pht('Email Paste');
	}

	- $file = PhabricatorPasteEditor::initializeFileForPaste(
	- $sender,
	- $title,
	- $mail->getCleanTextBody());
	-
	$xactions = array();

	$xactions[] = id(new PhabricatorPasteTransaction())
	->setTransactionType(PhabricatorPasteTransaction::TYPE_CONTENT)
	- ->setNewValue($file->getPHID());
	+ ->setNewValue($mail->getCleanTextBody());

	$xactions[] = id(new PhabricatorPasteTransaction())
	->setTransactionType(PhabricatorPasteTransaction::TYPE_TITLE)
	diff --git a/src/applications/paste/storage/PhabricatorPaste.php b/src/applications/paste/storage/PhabricatorPaste.php
	--- a/src/applications/paste/storage/PhabricatorPaste.php
	+++ b/src/applications/paste/storage/PhabricatorPaste.php
	@@ -45,7 +45,8 @@
	->setAuthorPHID($actor->getPHID())
	->setViewPolicy($view_policy)
	->setEditPolicy($edit_policy)
	- ->setSpacePHID($actor->getDefaultSpacePHID());
	+ ->setSpacePHID($actor->getDefaultSpacePHID())
	+ ->attachRawContent(null);
	}

	public static function getStatusNameMap() {
	diff --git a/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php b/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editengine/PhabricatorApplicationEditEngine.php
	@@ -0,0 +1,303 @@
	+<?php
	+
	+abstract class PhabricatorApplicationEditEngine extends Phobject {
	+
	+ private $viewer;
	+ private $controller;
	+
	+ final public function setViewer(PhabricatorUser $viewer) {
	+ $this->viewer = $viewer;
	+ return $this;
	+ }
	+
	+ final public function getViewer() {
	+ return $this->viewer;
	+ }
	+
	+ final public function setController(PhabricatorController $controller) {
	+ $this->controller = $controller;
	+ $this->setViewer($controller->getViewer());
	+ return $this;
	+ }
	+
	+ final public function getController() {
	+ return $this->controller;
	+ }
	+
	+ final protected function buildEditFields($object) {
	+ $viewer = $this->getViewer();
	+ $editor = $object->getApplicationTransactionEditor();
	+
	+ $types = $editor->getTransactionTypesForObject($object);
	+ $types = array_fuse($types);
	+
	+ $fields = $this->buildCustomEditFields($object);
	+
	+ if ($object instanceof PhabricatorPolicyInterface) {
	+ $policies = id(new PhabricatorPolicyQuery())
	+ ->setViewer($viewer)
	+ ->setObject($object)
	+ ->execute();
	+
	+ $map = array(
	+ PhabricatorTransactions::TYPE_VIEW_POLICY => array(
	+ 'key' => 'policy.view',
	+ 'aliases' => array('view'),
	+ 'capability' => PhabricatorPolicyCapability::CAN_VIEW,
	+ ),
	+ PhabricatorTransactions::TYPE_EDIT_POLICY => array(
	+ 'key' => 'policy.edit',
	+ 'aliases' => array('edit'),
	+ 'capability' => PhabricatorPolicyCapability::CAN_EDIT,
	+ ),
	+ PhabricatorTransactions::TYPE_JOIN_POLICY => array(
	+ 'key' => 'policy.join',
	+ 'aliases' => array('join'),
	+ 'capability' => PhabricatorPolicyCapability::CAN_JOIN,
	+ ),
	+ );
	+
	+ foreach ($map as $type => $spec) {
	+ if (empty($types[$type])) {
	+ continue;
	+ }
	+
	+ $capability = $spec['capability'];
	+ $key = $spec['key'];
	+ $aliases = $spec['aliases'];
	+
	+ $policy_field = id(new PhabricatorPolicyEditField())
	+ ->setKey($key)
	+ ->setAliases($aliases)
	+ ->setCapability($capability)
	+ ->setPolicies($policies)
	+ ->setTransactionType($type)
	+ ->setValue($object->getPolicy($capability));
	+ $fields[] = $policy_field;
	+
	+ if ($object instanceof PhabricatorSpacesInterface) {
	+ if ($capability == PhabricatorPolicyCapability::CAN_VIEW) {
	+ $type_space = PhabricatorTransactions::TYPE_SPACE;
	+ if (isset($types[$type_space])) {
	+ $space_field = id(new PhabricatorSpaceEditField())
	+ ->setKey('spacePHID')
	+ ->setAliases(array('space', 'policy.space'))
	+ ->setTransactionType($type_space)
	+ ->setValue($object->getSpacePHID());
	+ $fields[] = $space_field;
	+
	+ $policy_field->setSpaceField($space_field);
	+ }
	+ }
	+ }
	+ }
	+ }
	+
	+ $edge_type = PhabricatorTransactions::TYPE_EDGE;
	+ $object_phid = $object->getPHID();
	+
	+ $project_edge_type = PhabricatorProjectObjectHasProjectEdgeType::EDGECONST;
	+
	+ if ($object instanceof PhabricatorProjectInterface) {
	+ if (isset($types[$edge_type])) {
	+ if ($object_phid) {
	+ $project_phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
	+ $object_phid,
	+ $project_edge_type);
	+ $project_phids = array_reverse($project_phids);
	+ } else {
	+ $project_phids = array();
	+ }
	+
	+ $edge_field = id(new PhabricatorDatasourceEditField())
	+ ->setKey('projectPHIDs')
	+ ->setLabel(pht('Projects'))
	+ ->setDatasource(new PhabricatorProjectDatasource())
	+ ->setAliases(array('project', 'projects'))
	+ ->setTransactionType($edge_type)
	+ ->setMetadataValue('edge:type', $project_edge_type)
	+ ->setValue($project_phids);
	+ $fields[] = $edge_field;
	+ }
	+ }
	+
	+ $subscribers_type = PhabricatorTransactions::TYPE_SUBSCRIBERS;
	+
	+ if ($object instanceof PhabricatorSubscribableInterface) {
	+ if (isset($types[$subscribers_type])) {
	+ if ($object_phid) {
	+ $sub_phids = PhabricatorSubscribersQuery::loadSubscribersForPHID(
	+ $object_phid);
	+ } else {
	+ // TODO: Allow applications to provide default subscribers; Maniphest
	+ // does this at a minimum.
	+ $sub_phids = array();
	+ }
	+
	+ $subscribers_field = id(new PhabricatorDatasourceEditField())
	+ ->setKey('subscriberPHIDs')
	+ ->setLabel(pht('Subscribers'))
	+ ->setDatasource(new PhabricatorMetaMTAMailableDatasource())
	+ ->setAliases(array('subscriber', 'subscribers'))
	+ ->setTransactionType($subscribers_type)
	+ ->setValue($sub_phids);
	+ $fields[] = $subscribers_field;
	+ }
	+ }
	+
	+ return $fields;
	+ }
	+
	+ abstract protected function newEditableObject();
	+ abstract protected function newObjectQuery();
	+ abstract protected function buildCustomEditFields($object);
	+
	+ abstract protected function getObjectCreateTitleText($object);
	+ abstract protected function getObjectEditTitleText($object);
	+ abstract protected function getObjectCreateShortText($object);
	+ abstract protected function getObjectEditShortText($object);
	+ abstract protected function getObjectViewURI($object);
	+
	+ protected function getObjectCreateCancelURI($object) {
	+ return $this->getController()->getApplicationURI();
	+ }
	+
	+ protected function getObjectEditCancelURI($object) {
	+ return $this->getObjectViewURI($object);
	+ }
	+
	+ protected function getObjectCreateButtonText($object) {
	+ return $this->getObjectCreateTitleText($object);
	+ }
	+
	+ protected function getObjectEditButtonText($object) {
	+ return pht('Save Changes');
	+ }
	+
	+ final public function buildResponse() {
	+ $controller = $this->getController();
	+ $viewer = $this->getViewer();
	+ $request = $controller->getRequest();
	+
	+ $id = $request->getURIData('id');
	+ if ($id) {
	+ $object = $this->newObjectQuery()
	+ ->setViewer($viewer)
	+ ->withIDs(array($id))
	+ ->requireCapabilities(
	+ array(
	+ PhabricatorPolicyCapability::CAN_VIEW,
	+ PhabricatorPolicyCapability::CAN_EDIT,
	+ ))
	+ ->executeOne();
	+ if (!$object) {
	+ return new Aphront404Response();
	+ }
	+
	+ $is_create = false;
	+ } else {
	+ $object = $this->newEditableObject();
	+
	+ $is_create = true;
	+ }
	+
	+ $fields = $this->buildEditFields($object);
	+
	+ foreach ($fields as $field) {
	+ $field
	+ ->setViewer($viewer)
	+ ->setObject($object);
	+ }
	+
	+ $validation_exception = null;
	+ if ($request->isFormPost()) {
	+ foreach ($fields as $field) {
	+ $field->readValueFromSubmit($request);
	+ }
	+
	+ $template = $object->getApplicationTransactionTemplate();
	+
	+ $xactions = array();
	+ foreach ($fields as $field) {
	+ $xactions[] = $field->generateTransaction(clone $template);
	+ }
	+
	+ $editor = $object->getApplicationTransactionEditor()
	+ ->setActor($viewer)
	+ ->setContentSourceFromRequest($request)
	+ ->setContinueOnNoEffect(true)
	+ ->setContinueOnMissingFields(false);
	+
	+ try {
	+
	+ $editor->applyTransactions($object, $xactions);
	+
	+ return id(new AphrontRedirectResponse())
	+ ->setURI($this->getObjectViewURI($object));
	+ } catch (PhabricatorApplicationTransactionValidationException $ex) {
	+ $validation_exception = $ex;
	+ }
	+ } else {
	+ if ($is_create) {
	+ foreach ($fields as $field) {
	+ $field->readValueFromRequest($request);
	+ }
	+ } else {
	+ foreach ($fields as $field) {
	+ $field->readValueFromObject($object);
	+ }
	+ }
	+ }
	+
	+ $box = id(new PHUIObjectBoxView())
	+ ->setUser($viewer);
	+
	+ $crumbs = $controller->buildApplicationCrumbsForEditEngine();
	+
	+ if ($is_create) {
	+ $header_text = $this->getObjectCreateTitleText($object);
	+
	+ $crumbs->addTextCrumb(
	+ $this->getObjectCreateShortText($object));
	+
	+ $cancel_uri = $this->getObjectCreateCancelURI($object);
	+ $submit_button = $this->getObjectCreateButtonText($object);
	+ } else {
	+ $header_text = $this->getObjectEditTitleText($object);
	+
	+ $crumbs->addTextCrumb(
	+ $this->getObjectEditShortText($object),
	+ $this->getObjectViewURI($object));
	+
	+ $cancel_uri = $this->getObjectEditCancelURI($object);
	+ $submit_button = $this->getObjectEditButtonText($object);
	+ }
	+
	+ $box->setHeaderText($header_text);
	+
	+ $form = id(new AphrontFormView())
	+ ->setUser($viewer);
	+
	+ foreach ($fields as $field) {
	+ $field->appendToForm($form);
	+ }
	+
	+ $form->appendControl(
	+ id(new AphrontFormSubmitControl())
	+ ->addCancelButton($cancel_uri)
	+ ->setValue($submit_button));
	+
	+ $box->appendChild($form);
	+
	+ if ($validation_exception) {
	+ $box->setValidationException($validation_exception);
	+ }
	+
	+ return $controller->newPage()
	+ ->setTitle($header_text)
	+ ->setCrumbs($crumbs)
	+ ->appendChild($box);
	+ }
	+
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorDatasourceEditField.php b/src/applications/transactions/editfield/PhabricatorDatasourceEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorDatasourceEditField.php
	@@ -0,0 +1,21 @@
	+<?php
	+
	+final class PhabricatorDatasourceEditField
	+ extends PhabricatorTokenizerEditField {
	+
	+ private $datasource;
	+
	+ public function setDatasource(PhabricatorTypeaheadDatasource $datasource) {
	+ $this->datasource = $datasource;
	+ return $this;
	+ }
	+
	+ public function getDatasource() {
	+ return $this->datasource;
	+ }
	+
	+ protected function newDatasource() {
	+ return id(clone $this->getDatasource());
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorEditField.php b/src/applications/transactions/editfield/PhabricatorEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorEditField.php
	@@ -0,0 +1,212 @@
	+<?php
	+
	+abstract class PhabricatorEditField extends Phobject {
	+
	+ private $key;
	+ private $viewer;
	+ private $label;
	+ private $aliases = array();
	+ private $value;
	+ private $hasValue = false;
	+ private $object;
	+ private $transactionType;
	+ private $metadata = array();
	+
	+ public function setKey($key) {
	+ $this->key = $key;
	+ return $this;
	+ }
	+
	+ public function getKey() {
	+ return $this->key;
	+ }
	+
	+ public function setLabel($label) {
	+ $this->label = $label;
	+ return $this;
	+ }
	+
	+ public function getLabel() {
	+ return $this->label;
	+ }
	+
	+ public function setViewer(PhabricatorUser $viewer) {
	+ $this->viewer = $viewer;
	+ return $this;
	+ }
	+
	+ public function getViewer() {
	+ return $this->viewer;
	+ }
	+
	+ public function setAliases(array $aliases) {
	+ $this->aliases = $aliases;
	+ return $this;
	+ }
	+
	+ public function getAliases() {
	+ return $this->aliases;
	+ }
	+
	+ public function setObject($object) {
	+ $this->object = $object;
	+ return $this;
	+ }
	+
	+ public function getObject() {
	+ return $this->object;
	+ }
	+
	+ abstract protected function newControl();
	+
	+ protected function renderControl() {
	+ $control = $this->newControl();
	+ if ($control === null) {
	+ return null;
	+ }
	+
	+ $control
	+ ->setValue($this->getValueForControl())
	+ ->setName($this->getKey());
	+
	+ if (!$control->getLabel()) {
	+ $control->setLabel($this->getLabel());
	+ }
	+
	+ return $control;
	+ }
	+
	+ public function appendToForm(AphrontFormView $form) {
	+ $control = $this->renderControl();
	+ if ($control !== null) {
	+ $form->appendControl($control);
	+ }
	+ return $this;
	+ }
	+
	+ protected function getValueForControl() {
	+ return $this->getValue();
	+ }
	+
	+ protected function getValue() {
	+ return $this->value;
	+ }
	+
	+ public function setValue($value) {
	+ $this->hasValue = true;
	+ $this->value = $value;
	+ return $this;
	+ }
	+
	+ public function generateTransaction(
	+ PhabricatorApplicationTransaction $xaction) {
	+
	+ $xaction
	+ ->setTransactionType($this->getTransactionType())
	+ ->setNewValue($this->getValueForTransaction());
	+
	+ foreach ($this->metadata as $key => $value) {
	+ $xaction->setMetadataValue($key, $value);
	+ }
	+
	+ return $xaction;
	+ }
	+
	+ public function setMetadataValue($key, $value) {
	+ $this->metadata[$key] = $value;
	+ return $this;
	+ }
	+
	+ protected function getValueForTransaction() {
	+ return $this->getValue();
	+ }
	+
	+ public function getTransactionType() {
	+ if (!$this->transactionType) {
	+ throw new PhutilInvalidStateException('setTransactionType');
	+ }
	+ return $this->transactionType;
	+ }
	+
	+ public function setTransactionType($type) {
	+ $this->transactionType = $type;
	+ return $this;
	+ }
	+
	+ public function readValueFromRequest(AphrontRequest $request) {
	+ $check = array_merge(array($this->getKey()), $this->getAliases());
	+ foreach ($check as $key) {
	+ if (!$this->getValueExistsInRequest($request, $key)) {
	+ continue;
	+ }
	+
	+ $this->value = $this->getValueFromRequest($request, $key);
	+ return;
	+ }
	+
	+ $this->readValueFromObject($this->getObject());
	+
	+ return $this;
	+ }
	+
	+ public function readValueFromObject($object) {
	+ $this->value = $this->getValueFromObject($object);
	+ return $this;
	+ }
	+
	+ protected function getValueFromObject($object) {
	+ if ($this->hasValue) {
	+ return $this->value;
	+ } else {
	+ return $this->getDefaultValue();
	+ }
	+ }
	+
	+ protected function getValueExistsInRequest(AphrontRequest $request, $key) {
	+ return $this->getValueExistsInSubmit($request, $key);
	+ }
	+
	+ protected function getValueFromRequest(AphrontRequest $request, $key) {
	+ return $this->getValueFromSubmit($request, $key);
	+ }
	+
	+ public function readValueFromSubmit(AphrontRequest $request) {
	+ $key = $this->getKey();
	+ if ($this->getValueExistsInSubmit($request, $key)) {
	+ $value = $this->getValueFromSubmit($request, $key);
	+ } else {
	+ $value = $this->getDefaultValue();
	+ }
	+ $this->value = $value;
	+ return $this;
	+ }
	+
	+ protected function getValueExistsInSubmit(AphrontRequest $request, $key) {
	+ return $request->getExists($key);
	+ }
	+
	+ protected function getValueFromSubmit(AphrontRequest $request, $key) {
	+ return $request->getStr($key);
	+ }
	+
	+ protected function getDefaultValue() {
	+ return null;
	+ }
	+
	+ protected function getListFromRequest(
	+ AphrontRequest $request,
	+ $key) {
	+
	+ $list = $request->getArr($key, null);
	+ if ($list === null) {
	+ $list = $request->getStrList($key);
	+ }
	+
	+ if (!$list) {
	+ return array();
	+ }
	+
	+ return $list;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorPolicyEditField.php b/src/applications/transactions/editfield/PhabricatorPolicyEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorPolicyEditField.php
	@@ -0,0 +1,54 @@
	+<?php
	+
	+final class PhabricatorPolicyEditField
	+ extends PhabricatorEditField {
	+
	+ private $policies;
	+ private $capability;
	+ private $spaceField;
	+
	+ public function setPolicies(array $policies) {
	+ $this->policies = $policies;
	+ return $this;
	+ }
	+
	+ public function getPolicies() {
	+ if ($this->policies === null) {
	+ throw new PhutilInvalidStateException('setPolicies');
	+ }
	+ return $this->policies;
	+ }
	+
	+ public function setCapability($capability) {
	+ $this->capability = $capability;
	+ return $this;
	+ }
	+
	+ public function getCapability() {
	+ return $this->capability;
	+ }
	+
	+ public function setSpaceField(PhabricatorSpaceEditField $space_field) {
	+ $this->spaceField = $space_field;
	+ return $this;
	+ }
	+
	+ public function getSpaceField() {
	+ return $this->spaceField;
	+ }
	+
	+ protected function newControl() {
	+ $control = id(new AphrontFormPolicyControl())
	+ ->setCapability($this->getCapability())
	+ ->setPolicyObject($this->getObject())
	+ ->setPolicies($this->getPolicies());
	+
	+ $space_field = $this->getSpaceField();
	+ if ($space_field) {
	+ $control->setSpacePHID($space_field->getValueForControl());
	+ }
	+
	+ return $control;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorSelectEditField.php b/src/applications/transactions/editfield/PhabricatorSelectEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorSelectEditField.php
	@@ -0,0 +1,25 @@
	+<?php
	+
	+final class PhabricatorSelectEditField
	+ extends PhabricatorEditField {
	+
	+ private $options;
	+
	+ public function setOptions(array $options) {
	+ $this->options = $options;
	+ return $this;
	+ }
	+
	+ public function getOptions() {
	+ if ($this->options === null) {
	+ throw new PhutilInvalidStateException('setOptions');
	+ }
	+ return $this->options;
	+ }
	+
	+ protected function newControl() {
	+ return id(new AphrontFormSelectControl())
	+ ->setOptions($this->getOptions());
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorSpaceEditField.php b/src/applications/transactions/editfield/PhabricatorSpaceEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorSpaceEditField.php
	@@ -0,0 +1,12 @@
	+<?php
	+
	+final class PhabricatorSpaceEditField
	+ extends PhabricatorEditField {
	+
	+ protected function newControl() {
	+ // NOTE: This field doesn't do anything on its own, it just serves as a
	+ // companion to the associated View Policy field.
	+ return null;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorTextAreaEditField.php b/src/applications/transactions/editfield/PhabricatorTextAreaEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorTextAreaEditField.php
	@@ -0,0 +1,42 @@
	+<?php
	+
	+final class PhabricatorTextAreaEditField
	+ extends PhabricatorEditField {
	+
	+ private $monospaced;
	+ private $height;
	+
	+ public function setMonospaced($monospaced) {
	+ $this->monospaced = $monospaced;
	+ return $this;
	+ }
	+
	+ public function getMonospaced() {
	+ return $this->monospaced;
	+ }
	+
	+ public function setHeight($height) {
	+ $this->height = $height;
	+ return $this;
	+ }
	+
	+ public function getHeight() {
	+ return $this->height;
	+ }
	+
	+ protected function newControl() {
	+ $control = new AphrontFormTextAreaControl();
	+
	+ if ($this->getMonospaced()) {
	+ $control->setCustomClass('PhabricatorMonospaced');
	+ }
	+
	+ $height = $this->getHeight();
	+ if ($height) {
	+ $control->setHeight($height);
	+ }
	+
	+ return $control;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorTextEditField.php b/src/applications/transactions/editfield/PhabricatorTextEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorTextEditField.php
	@@ -0,0 +1,10 @@
	+<?php
	+
	+final class PhabricatorTextEditField
	+ extends PhabricatorEditField {
	+
	+ protected function newControl() {
	+ return new AphrontFormTextControl();
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editfield/PhabricatorTokenizerEditField.php b/src/applications/transactions/editfield/PhabricatorTokenizerEditField.php
	new file mode 100644
	--- /dev/null
	+++ b/src/applications/transactions/editfield/PhabricatorTokenizerEditField.php
	@@ -0,0 +1,90 @@
	+<?php
	+
	+abstract class PhabricatorTokenizerEditField
	+ extends PhabricatorEditField {
	+
	+ private $originalValue;
	+
	+ abstract protected function newDatasource();
	+
	+ protected function newControl() {
	+ $control = id(new AphrontFormTokenizerControl())
	+ ->setDatasource($this->newDatasource());
	+
	+ if ($this->originalValue !== null) {
	+ $control->setOriginalValue($this->originalValue);
	+ }
	+
	+ return $control;
	+ }
	+
	+ public function setOriginalValue(array $value) {
	+ $this->originalValue = $value;
	+ return $this;
	+ }
	+
	+ public function setValue($value) {
	+ $this->originalValue = $value;
	+ return parent::setValue($value);
	+ }
	+
	+ protected function getValueFromSubmit(AphrontRequest $request, $key) {
	+ // TODO: Maybe move this unusual read somewhere else so subclassing this
	+ // correctly is easier?
	+ $this->originalValue = $request->getArr($key.'.original');
	+
	+ return $this->getListFromRequest($request, $key);
	+ }
	+
	+ protected function getDefaultValue() {
	+ return array();
	+ }
	+
	+ protected function getValueForTransaction() {
	+ $new = parent::getValueForTransaction();
	+
	+ $edge_types = array(
	+ PhabricatorTransactions::TYPE_EDGE => true,
	+ PhabricatorTransactions::TYPE_SUBSCRIBERS => true,
	+ );
	+
	+ if (isset($edge_types[$this->getTransactionType()])) {
	+ if ($this->originalValue !== null) {
	+ // If we're building an edge transaction and the request has data
	+ // about the original value the user saw when they loaded the form,
	+ // interpret the edit as a mixture of "+" and "-" operations instead
	+ // of a single "=" operation. This limits our exposure to race
	+ // conditions by making most concurrent edits merge correctly.
	+
	+ $new = parent::getValueForTransaction();
	+ $old = $this->originalValue;
	+
	+ $add = array_diff($new, $old);
	+ $rem = array_diff($old, $new);
	+
	+ $value = array();
	+
	+ if ($add) {
	+ $value['+'] = array_fuse($add);
	+ }
	+ if ($rem) {
	+ $value['-'] = array_fuse($rem);
	+ }
	+
	+ return $value;
	+ } else {
	+
	+ if (!is_array($new)) {
	+ throw new Exception(print_r($new, true));
	+ }
	+
	+ return array(
	+ '=' => array_fuse($new),
	+ );
	+ }
	+ }
	+
	+ return $new;
	+ }
	+
	+}
	diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
	--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
	+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
	@@ -242,6 +242,19 @@
	return $this->applicationEmail;
	}

	+ public function getTransactionTypesForObject($object) {
	+ $old = $this->object;
	+ try {
	+ $this->object = $object;
	+ $result = $this->getTransactionTypes();
	+ $this->object = $old;
	+ } catch (Exception $ex) {
	+ $this->object = $old;
	+ throw $ex;
	+ }
	+ return $result;
	+ }
	+
	public function getTransactionTypes() {
	$types = array();

	@@ -1650,7 +1663,7 @@
	throw new Exception(
	pht(
	"Invalid '%s' value for PHID transaction. Value should contain only ".
	- "keys '%s' (add PHIDs), '%' (remove PHIDs) and '%s' (set PHIDS).",
	+ "keys '%s' (add PHIDs), '%s' (remove PHIDs) and '%s' (set PHIDS).",
	'new',
	'+',
	'-',
	diff --git a/src/view/control/AphrontTokenizerTemplateView.php b/src/view/control/AphrontTokenizerTemplateView.php
	--- a/src/view/control/AphrontTokenizerTemplateView.php
	+++ b/src/view/control/AphrontTokenizerTemplateView.php
	@@ -6,6 +6,7 @@
	private $name;
	private $id;
	private $browseURI;
	+ private $originalValue;

	public function setBrowseURI($browse_uri) {
	$this->browseURI = $browse_uri;
	@@ -36,6 +37,15 @@
	return $this->name;
	}

	+ public function setOriginalValue(array $original_value) {
	+ $this->originalValue = $original_value;
	+ return $this;
	+ }
	+
	+ public function getOriginalValue() {
	+ return $this->originalValue;
	+ }
	+
	public function render() {
	require_celerity_resource('aphront-tokenizer-control-css');

	@@ -85,6 +95,20 @@
	$classes[] = 'has-browse';
	}

	+ $original = array();
	+ $original_value = $this->getOriginalValue();
	+ if ($original_value) {
	+ foreach ($this->getOriginalValue() as $value) {
	+ $original[] = phutil_tag(
	+ 'input',
	+ array(
	+ 'type' => 'hidden',
	+ 'name' => $name.'.original[]',
	+ 'value' => $value,
	+ ));
	+ }
	+ }
	+
	$frame = javelin_tag(
	'div',
	array(
	@@ -94,6 +118,7 @@
	array(
	$container,
	$browse,
	+ $original,
	));

	return $frame;
	diff --git a/src/view/form/control/AphrontFormTokenizerControl.php b/src/view/form/control/AphrontFormTokenizerControl.php
	--- a/src/view/form/control/AphrontFormTokenizerControl.php
	+++ b/src/view/form/control/AphrontFormTokenizerControl.php
	@@ -7,6 +7,7 @@
	private $limit;
	private $placeholder;
	private $handles;
	+ private $originalValue;

	public function setDatasource(PhabricatorTypeaheadDatasource $datasource) {
	$this->datasource = $datasource;
	@@ -32,6 +33,15 @@
	return $this;
	}

	+ public function setOriginalValue(array $original_value) {
	+ $this->originalValue = $original_value;
	+ return $this;
	+ }
	+
	+ public function getOriginalValue() {
	+ return $this->originalValue;
	+ }
	+
	public function willRender() {
	// Load the handles now so we'll get a bulk load later on when we actually
	// render them.
	@@ -69,10 +79,15 @@
	$token->setInputName($this->getName());
	}

	- $template = new AphrontTokenizerTemplateView();
	- $template->setName($name);
	- $template->setID($id);
	- $template->setValue($tokens);
	+ $template = id(new AphrontTokenizerTemplateView())
	+ ->setName($name)
	+ ->setID($id)
	+ ->setValue($tokens);
	+
	+ $original_value = $this->getOriginalValue();
	+ if ($original_value !== null) {
	+ $template->setOriginalValue($original_value);
	+ }

	$username = null;
	if ($this->user) {

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