Fixed timestamp highlighting in albums.

Fixed #17078.

Telegram/SourceFiles/history/view/media/history_view_media_grouped.cpp

@@ -12,6 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history.h"
 #include "history/view/history_view_element.h"
 #include "history/view/history_view_cursor_state.h"
+#include "data/data_document.h"
 #include "data/data_media_types.h"
 #include "data/data_session.h"
 #include "storage/storage_shared_media.h"
@@ -652,26 +653,53 @@ HistoryMessageEdited *GroupedMedia::displayedEditBadge() const {
 }
 
 void GroupedMedia::updateNeedBubbleState() {
-	const auto captionItem = [&]() -> HistoryItem* {
+	using PartPtrOpt = std::optional<const Part*>;
+	const auto captionPart = [&]() -> PartPtrOpt {
 		if (_mode == Mode::Column) {
-			return nullptr;
+			return std::nullopt;
 		}
-		auto result = (HistoryItem*)nullptr;
+		auto result = PartPtrOpt();
 		for (const auto &part : _parts) {
 			if (!part.item->emptyText()) {
 				if (result) {
-					return nullptr;
+					return std::nullopt;
 				} else {
-					result = part.item;
+					result = &part;
 				}
 			}
 		}
 		return result;
 	}();
-	if (captionItem) {
+	if (captionPart) {
-		_caption = createCaption(captionItem);
+		const auto &part = (*captionPart);
+		struct Timestamp {
+			int duration = 0;
+			QString base;
+		};
+		const auto timestamp = [&]() -> Timestamp {
+			const auto &document = part->content->getDocument();
+			if (!document || document->isAnimation()) {
+				return {};
+			}
+			const auto duration = document->getDuration();
+			return {
+				.duration = duration,
+				.base = duration
+					? DocumentTimestampLinkBase(
+						document,
+						part->item->fullId())
+					: QString(),
+			};
+		}();
+		_caption = createCaption(
+			part->item,
+			timestamp.duration,
+			timestamp.base);
+
+		_captionItem = part->item;
+	} else {
+		_captionItem = nullptr;
 	}
-	_captionItem = captionItem;
 	_needBubble = computeNeedBubble();
 }