Support markup in TranslateBox.

Server will translate with markup for premium users.

Telegram/SourceFiles/boxes/translate_box.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "boxes/translate_box.h"
 
+#include "api/api_text_entities.h" // Api::EntitiesToMTP / EntitiesFromMTP.
 #include "core/application.h"
 #include "core/core_settings.h"
 #include "core/ui_integration.h"
@@ -22,6 +23,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/boxes/choose_language_box.h"
 #include "ui/effects/loading_element.h"
 #include "ui/layers/generic_box.h"
+#include "ui/text/text_utilities.h"
 #include "ui/toasts/common_toasts.h"
 #include "ui/painter.h"
 #include "ui/widgets/buttons.h"
@@ -111,12 +113,6 @@ void TranslateBox(
 	const auto state = box->lifetime().make_state<State>(&peer->session());
 	state->to = ChooseTranslateTo(peer->owner().history(peer));
 
-	text.entities = ranges::views::all(
-		text.entities
-	) | ranges::views::filter([](const EntityInText &e) {
-		return e.type() != EntityType::Spoiler;
-	}) | ranges::to<EntitiesInText>();
-
 	if (!IsServerMsgId(msgId)) {
 		msgId = 0;
 	}
@@ -212,8 +208,14 @@ void TranslateBox(
 				return id.locale().textDirection() == Qt::RightToLeft;
 			}))));
 
-	const auto showText = [=](const QString &text) {
-		translated->entity()->setText(text);
+	const auto showText = [=](TextWithEntities text) {
+		const auto label = translated->entity();
+		label->setMarkedText(
+			text,
+			Core::MarkedTextContext{
+				.session = &peer->session(),
+				.customEmojiRepaint = [=] { label->update(); },
+			});
 		translated->show(anim::type::instant);
 		loading->hide(anim::type::instant);
 	};
@@ -231,16 +233,28 @@ void TranslateBox(
 				? MTPVector<MTPTextWithEntities>()
 				: MTP_vector<MTPTextWithEntities>(1, MTP_textWithEntities(
 					MTP_string(text.text),
-					MTP_vector<MTPMessageEntity>()))),
+					Api::EntitiesToMTP(
+						&peer->session(),
+						text.entities,
+						Api::ConvertOption::SkipLocal)))),
 			MTP_string(to.twoLetterCode())
 		)).done([=](const MTPmessages_TranslatedText &result) {
 			const auto &data = result.data();
 			const auto &list = data.vresult().v;
-			showText(list.isEmpty()
-				? tr::lng_translate_box_error(tr::now)
-				: qs(list.front().data().vtext()));
+			if (list.isEmpty()) {
+				showText(
+					Ui::Text::Italic(tr::lng_translate_box_error(tr::now)));
+			} else {
+				showText(TextWithEntities{
+					.text = qs(list.front().data().vtext()),
+					.entities = Api::EntitiesFromMTP(
+						&peer->session(),
+						list.front().data().ventities().v),
+				});
+			}
 		}).fail([=](const MTP::Error &error) {
-			showText(tr::lng_translate_box_error(tr::now));
+			showText(
+				Ui::Text::Italic(tr::lng_translate_box_error(tr::now)));
 		}).send();
 	};
 	state->to.value() | rpl::start_with_next(send, box->lifetime());