Support spoilers in chats list media previews.

Telegram/SourceFiles/data/data_media_types.cpp

@@ -101,7 +101,8 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 
 [[nodiscard]] QImage PreparePreviewImage(
 		not_null<const Image*> image,
-		ImageRoundRadius radius = ImageRoundRadius::Small) {
+		ImageRoundRadius radius,
+		bool spoiler) {
 	const auto original = image->original();
 	if (original.width() * 10 < original.height()
 		|| original.height() * 10 < original.width()) {
@@ -119,6 +120,11 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 		size,
 		size
 	).convertToFormat(QImage::Format_ARGB32_Premultiplied);
+	if (spoiler) {
+		square = Images::BlurLargeImage(
+			std::move(square),
+			style::ConvertScale(3) * factor);
+	}
 	if (radius == ImageRoundRadius::Small) {
 		struct Cache {
 			base::flat_map<int, std::array<QImage, 4>> all;
@@ -146,27 +152,33 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 	return square;
 }
 
+template <typename MediaType>
+[[nodiscard]] uint64 CountCacheKey(not_null<MediaType*> data, bool spoiler) {
+	return (reinterpret_cast<uint64>(data.get()) & ~1) | (spoiler ? 1 : 0);
+}
+
 [[nodiscard]] ItemPreviewImage PreparePhotoPreview(
 		not_null<const HistoryItem*> item,
 		const std::shared_ptr<PhotoMedia> &media,
-		ImageRoundRadius radius) {
+		ImageRoundRadius radius,
+		bool spoiler) {
 	const auto photo = media->owner();
-	const auto readyCacheKey = reinterpret_cast<uint64>(photo.get());
+	const auto counted = CountCacheKey(photo, spoiler);
 	if (const auto small = media->image(PhotoSize::Small)) {
-		return { PreparePreviewImage(small, radius), readyCacheKey };
+		return { PreparePreviewImage(small, radius, spoiler), counted };
 	} else if (const auto thumbnail = media->image(PhotoSize::Thumbnail)) {
-		return { PreparePreviewImage(thumbnail, radius), readyCacheKey };
+		return { PreparePreviewImage(thumbnail, radius, spoiler), counted };
 	} else if (const auto large = media->image(PhotoSize::Large)) {
-		return { PreparePreviewImage(large, radius), readyCacheKey };
+		return { PreparePreviewImage(large, radius, spoiler), counted };
 	}
 	const auto allowedToDownload = media->autoLoadThumbnailAllowed(
 		item->history()->peer);
-	const auto cacheKey = allowedToDownload ? 0 : readyCacheKey;
+	const auto cacheKey = allowedToDownload ? 0 : counted;
 	if (allowedToDownload) {
 		media->owner()->load(PhotoSize::Small, item->fullId());
 	}
 	if (const auto blurred = media->thumbnailInline()) {
-		return { PreparePreviewImage(blurred, radius), cacheKey };
+		return { PreparePreviewImage(blurred, radius, spoiler), cacheKey };
 	}
 	return { QImage(), allowedToDownload ? 0 : cacheKey };
 }
@@ -174,17 +186,21 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 [[nodiscard]] ItemPreviewImage PrepareFilePreviewImage(
 		not_null<const HistoryItem*> item,
 		const std::shared_ptr<DocumentMedia> &media,
-		ImageRoundRadius radius) {
+		ImageRoundRadius radius,
+		bool spoiler) {
 	Expects(media->owner()->hasThumbnail());
 
 	const auto document = media->owner();
-	const auto readyCacheKey = reinterpret_cast<uint64>(document.get());
+	const auto readyCacheKey = CountCacheKey(document, spoiler);
 	if (const auto thumbnail = media->thumbnail()) {
-		return { PreparePreviewImage(thumbnail, radius), readyCacheKey };
+		return {
+			PreparePreviewImage(thumbnail, radius, spoiler),
+			readyCacheKey,
+		};
 	}
 	document->loadThumbnail(item->fullId());
 	if (const auto blurred = media->thumbnailInline()) {
-		return { PreparePreviewImage(blurred, radius), 0 };
+		return { PreparePreviewImage(blurred, radius, spoiler), 0 };
 	}
 	return { QImage(), 0 };
 }
@@ -204,8 +220,9 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 [[nodiscard]] ItemPreviewImage PrepareFilePreview(
 		not_null<const HistoryItem*> item,
 		const std::shared_ptr<DocumentMedia> &media,
-		ImageRoundRadius radius) {
+		ImageRoundRadius radius,
-	auto result = PrepareFilePreviewImage(item, media, radius);
+		bool spoiler) {
+	auto result = PrepareFilePreviewImage(item, media, radius, spoiler);
 	const auto document = media->owner();
 	if (!result.data.isNull()
 		&& (document->isVideoFile() || document->isVideoMessage())) {
@@ -223,13 +240,14 @@ using ItemPreviewImage = HistoryView::ItemPreviewImage;
 template <typename MediaType>
 [[nodiscard]] ItemPreviewImage FindCachedPreview(
 		const std::vector<ItemPreviewImage> *existing,
-		not_null<MediaType*> data) {
+		not_null<MediaType*> data,
+		bool spoiler) {
 	if (!existing) {
 		return {};
 	}
 	const auto i = ranges::find(
 		*existing,
-		reinterpret_cast<uint64>(data.get()),
+		CountCacheKey(data, spoiler),
 		&ItemPreviewImage::cacheKey);
 	return (i != end(*existing)) ? *i : ItemPreviewImage();
 }
@@ -619,14 +637,18 @@ ItemPreview MediaPhoto::toPreview(ToPreviewOptions options) const {
 	}
 	auto images = std::vector<ItemPreviewImage>();
 	auto context = std::any();
-	if (auto cached = FindCachedPreview(options.existing, _photo)) {
+	if (auto found = FindCachedPreview(options.existing, _photo, _spoiler)) {
-		images.push_back(std::move(cached));
+		images.push_back(std::move(found));
 	} else {
 		const auto media = _photo->createMediaView();
 		const auto radius = _chat
 			? ImageRoundRadius::Ellipse
 			: ImageRoundRadius::Small;
-		if (auto prepared = PreparePhotoPreview(parent(), media, radius)
+		if (auto prepared = PreparePhotoPreview(
+				parent(),
+				media,
+				radius,
+				_spoiler)
 			; prepared || !prepared.cacheKey) {
 			images.push_back(std::move(prepared));
 			if (!prepared.cacheKey) {
@@ -848,14 +870,19 @@ ItemPreview MediaFile::toPreview(ToPreviewOptions options) const {
 	}
 	auto images = std::vector<ItemPreviewImage>();
 	auto context = std::any();
-	if (auto cached = FindCachedPreview(options.existing, _document)) {
+	const auto existing = options.existing;
-		images.push_back(std::move(cached));
+	if (auto found = FindCachedPreview(existing, _document, _spoiler)) {
+		images.push_back(std::move(found));
 	} else if (TryFilePreview(_document)) {
 		const auto media = _document->createMediaView();
 		const auto radius = _document->isVideoMessage()
 			? ImageRoundRadius::Ellipse
 			: ImageRoundRadius::Small;
-		if (auto prepared = PrepareFilePreview(parent(), media, radius)
+		if (auto prepared = PrepareFilePreview(
+				parent(),
+				media,
+				radius,
+				_spoiler)
 			; prepared || !prepared.cacheKey) {
 			images.push_back(std::move(prepared));
 			if (!prepared.cacheKey) {

Telegram/SourceFiles/dialogs/ui/dialogs_message_view.cpp

@@ -13,6 +13,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "main/main_session.h"
 #include "dialogs/ui/dialogs_layout.h"
 #include "dialogs/ui/dialogs_topics_view.h"
+#include "ui/effects/spoiler_mess.h"
 #include "ui/text/text_options.h"
 #include "ui/text/text_utilities.h"
 #include "ui/image/image.h"
@@ -185,6 +186,11 @@ void MessageView::prepare(
 		context);
 	_textCachedFor = item;
 	_imagesCache = std::move(preview.images);
+	if (!ranges::any_of(_imagesCache, &ItemPreviewImage::hasSpoiler)) {
+		_spoiler = nullptr;
+	} else if (!_spoiler) {
+		_spoiler = std::make_unique<SpoilerAnimation>(customEmojiRepaint);
+	}
 	if (preview.loadingContext.has_value()) {
 		if (!_loadingContext) {
 			_loadingContext = std::make_unique<LoadingContext>();
@@ -302,10 +308,19 @@ void MessageView::paint(
 		if (rect.width() < st::dialogsMiniPreview) {
 			break;
 		}
-		p.drawImage(
+		const auto mini = QRect(
 			rect.x(),
 			rect.y() + st::dialogsMiniPreviewTop,
-			image.data);
+			st::dialogsMiniPreview,
+			st::dialogsMiniPreview);
+		if (!image.data.isNull()) {
+			p.drawImage(mini, image.data);
+			if (image.hasSpoiler()) {
+				const auto frame = DefaultImageSpoiler().frame(
+					_spoiler->index(context.now, context.paused));
+				FillSpoilerRect(p, mini, frame);
+			}
+		}
 		rect.setLeft(rect.x()
 			+ st::dialogsMiniPreview
 			+ st::dialogsMiniPreviewSkip);

Telegram/SourceFiles/dialogs/ui/dialogs_message_view.h

@@ -18,6 +18,7 @@ struct DialogRow;
 } // namespace style
 
 namespace Ui {
+class SpoilerAnimation;
 } // namespace Ui
 
 namespace Data {
@@ -88,6 +89,7 @@ private:
 	mutable std::unique_ptr<TopicsView> _topics;
 	mutable Text::String _textCache;
 	mutable std::vector<ItemPreviewImage> _imagesCache;
+	mutable std::unique_ptr<SpoilerAnimation> _spoiler;
 	mutable std::unique_ptr<LoadingContext> _loadingContext;
 
 };

Telegram/SourceFiles/history/view/history_view_item_preview.h

@@ -13,6 +13,10 @@ struct ItemPreviewImage {
 	QImage data;
 	uint64 cacheKey = 0;
 
+	[[nodiscard]] bool hasSpoiler() const {
+		return (cacheKey & 1);
+	}
+
 	explicit operator bool() const {
 		return !data.isNull();
 	}