Remove integration with removed MobileFrontend talk page tools

* Remove the hook we used to disable that feature
* Remove CSS that only applied when it was enabled
* Update code comments that referred to it

Bug: T319145
Change-Id: If21a04f6a087289d8249a786f7c991e5e12c9bed

extension.json

@@ -425,7 +425,6 @@
 		"BeforeCreateEchoEvent": "\\MediaWiki\\Extension\\DiscussionTools\\Hooks\\EchoHooks::onBeforeCreateEchoEvent",
 		"EchoGetBundleRules": "\\MediaWiki\\Extension\\DiscussionTools\\Hooks\\EchoHooks::onEchoGetBundleRules",
 		"EchoGetEventsForRevision": "\\MediaWiki\\Extension\\DiscussionTools\\Hooks\\EchoHooks::onEchoGetEventsForRevision",
-		"MinervaNeueTalkPageOverlay": "\\MediaWiki\\Extension\\DiscussionTools\\Hooks\\MobileHooks::onMinervaNeueTalkPageOverlay",
 		"RevisionDataUpdates": "dataupdates",
 		"LoadExtensionSchemaUpdates": "installer",
 		"GetDoubleUnderscoreIDs": "parser",

includes/Hooks/HookUtils.php

@@ -456,8 +456,7 @@ class HookUtils {
 		$dtConfig = MediaWikiServices::getInstance()->getConfigFactory()->makeConfig( 'discussiontools' );
 
 		if ( $isMobile ) {
-			// Enabling mobile removes MobileFrontend's reply and new topic tools, so always
-			// enable these tools as a replacement.
+			// DiscussionToolsEnableMobile controls all features on mobile
 			return (
 				$dtConfig->get( 'DiscussionToolsEnableMobile' ) ||
 				static::determineUserABTestBucket( $output->getUser(), 'mobile' ) === 'test'

includes/Hooks/MobileHooks.php

@@ -1,26 +0,0 @@
-<?php
-/**
- * DiscussionTools mobile hooks
- *
- * @file
- * @ingroup Extensions
- * @license MIT
- */
-
-namespace MediaWiki\Extension\DiscussionTools\Hooks;
-
-class MobileHooks {
-	/**
-	 * Decide whether mobile frontend should be allowed to activate
-	 *
-	 * @param \Title $title
-	 * @param \OutputPage $output
-	 * @return bool|void This hook can return false to abort, causing the talk overlay to not be shown
-	 */
-	public static function onMinervaNeueTalkPageOverlay( $title, $output ) {
-		if ( HookUtils::isFeatureEnabledForOutput( $output ) ) {
-			return false;
-		}
-		return true;
-	}
-}

includes/Hooks/PageHooks.php

@@ -232,8 +232,7 @@ class PageHooks implements
 				] );
 				$output->addBodyClasses( 'ext-discussiontools-init-new-topic-opened' );
 
-				// Minerva doesn't show a new topic button by default, unless the MobileFrontend
-				// talk page feature is enabled, but we shouldn't depend on code from there.
+				// Minerva doesn't show a new topic button.
 				$output->addHTML( Html::rawElement( 'div',
 					[ 'class' => 'ext-discussiontools-init-new-topic' ],
 					( new ButtonWidget( [
@@ -244,7 +243,7 @@ class PageHooks implements
 						'flags' => [ 'progressive', 'primary' ],
 						'infusable' => true,
 					] ) )
-						// For compatibility with Minerva click tracking (T295490)
+						// For compatibility with MobileWebUIActionsTracking logging (T295490)
 						->setAttributes( [ 'data-event-name' => 'talkpage.add-topic' ] )
 				) );
 			}

modules/dt.init.less

@@ -47,12 +47,6 @@ h1, h2, h3, h4, h5, h6 {
 		display: none;
 	}
 
-	// No support for reply links in the mobile talk overlay
-	// stylelint-disable-next-line selector-class-pattern
-	.talk-overlay & {
-		display: none;
-	}
-
 	.ext-discussiontools-init-replylink {
 		&-reply {
 			cursor: pointer;
@@ -389,13 +383,6 @@ h1, h2, h3, h4, h5, h6 {
 	> h2 {
 		flex-grow: 1;
 	}
-
-	// stylelint-disable-next-line selector-class-pattern
-	.client-js .skin-minerva--talk-simplified&.section-heading > h2 {
-		font: inherit;
-		margin: 0;
-		padding: 0;
-	}
 }
 
 .ext-discussiontools-visualenhancements-enabled {
@@ -636,10 +623,8 @@ h1, h2, h3, h4, h5, h6 {
 }
 
 .skin-minerva.ext-discussiontools-emptystate-shown {
-	// The Minerva "Add topic" button is very eye-catching.
+	// The mobile "Add topic" button is very eye-catching.
 	// No need to show it when the empty state banner is shown.
-	// stylelint-disable-next-line selector-class-pattern
-	.minerva-talk-add-button,
 	.ext-discussiontools-init-new-topic {
 		display: none;
 	}
@@ -748,18 +733,10 @@ h1, h2, h3, h4, h5, h6 {
 	}
 }
 
-// DiscussionToolsEnableMobile disables the Minerva simplified talk page
-// (SkinMinerva::isSimplifiedTalkPageEnabled). This is enabled on all pages
-// in the talk namespace (with wikitext content model, but this file is not
-// loaded on non-wikitext pages).
-//
 // DiscussionToolsEnableMobile enables multiple features, including the reply tool.
-//
-// Whenever we detect that DiscussionToolsEnableMobile is disabling the Minerva
-// simplified talk page, hide the lede section, and show a "Read as wiki page" button
+// When we detect that it's enabled, hide the lede section, and show a "Read as wiki page" button
 // to reveal it.
-//
-// The button will disable all DT features byt remove feature CSS classes.
+// The button will disable all DT features by removing feature CSS classes.
 // stylelint-disable-next-line selector-class-pattern
 .skin-minerva.ns-talk.ext-discussiontools-replytool-enabled {
 	&.ext-discussiontools-init-lede-hidden {

modules/mobile.js

@@ -25,7 +25,7 @@ function onViewportChange() {
 }
 
 function init( $container ) {
-	// For compatibility with Minerva click tracking (T295490)
+	// For compatibility with MobileWebUIActionsTracking logging (T295490)
 	$container.find( '.section-heading' ).attr( 'data-event-name', 'talkpage.section' );
 
 	// Keyboard body classes
@@ -92,7 +92,7 @@ function init( $container ) {
 	) {
 		// eslint-disable-next-line no-jquery/no-global-selector
 		newTopicButton = OO.ui.infuse( $( '.ext-discussiontools-init-new-topic-button' ) );
-		// For compatibility with Minerva click tracking (T295490)
+		// For compatibility with MobileWebUIActionsTracking logging (T295490)
 		newTopicButton.$element.attr( 'data-event-name', 'talkpage.add-topic' );
 		// eslint-disable-next-line no-jquery/no-global-selector
 		var $newTopicWrapper = $( '.ext-discussiontools-init-new-topic' );
@@ -135,7 +135,7 @@ function init( $container ) {
 		}, 200 ) );
 	}
 	if ( !$readAsWikiPage ) {
-		// Read as wiki page button, copied from renderReadAsWikiPageButton in Minerva
+		// Read as wiki page button, copied from old MobileFrontend/Minerva feature (removed in T319145)
 		$readAsWikiPage = $( '<button>' )
 			.addClass( 'ext-discussiontools-init-readAsWikiPage' )
 			.attr( 'data-event-name', 'talkpage.readAsWiki' )