Let [Photo|Document]Media outlive message view.

Telegram/SourceFiles/data/data_document.cpp

@@ -1601,13 +1601,9 @@ void DocumentData::collectLocalData(not_null<DocumentData*> local) {
 
 	_owner->cache().copyIfEmpty(local->cacheKey(), cacheKey());
 	if (const auto localMedia = local->activeMediaView()) {
-		const auto media = createMediaView();
+		auto media = createMediaView();
 		media->collectLocalData(localMedia.get());
-
-		// Keep DocumentMedia alive for some more time.
-		// NB! This allows DocumentMedia to outlive Main::Session!
-		// In case this is a problem this code should be rewritten.
-		crl::on_main(&session(), [media] {});
+		_owner->keepAlive(std::move(media));
 	}
 	if (!local->_location.inMediaCache() && !local->_location.isEmpty()) {
 		_location = local->_location;

Telegram/SourceFiles/data/data_photo.cpp

@@ -230,13 +230,9 @@ void PhotoData::collectLocalData(not_null<PhotoData*> local) {
 		}
 	}
 	if (const auto localMedia = local->activeMediaView()) {
-		const auto media = createMediaView();
+		auto media = createMediaView();
 		media->collectLocalData(localMedia.get());
-
-		// Keep DocumentMedia alive for some more time.
-		// NB! This allows DocumentMedia to outlive Main::Session!
-		// In case this is a problem this code should be rewritten.
-		crl::on_main(&session(), [media] {});
+		_owner->keepAlive(std::move(media));
 	}
 }
 

Telegram/SourceFiles/data/data_reply_preview.cpp

@@ -79,7 +79,7 @@ Image *ReplyPreview::image(Data::FileOrigin origin) {
 					prepare(image, option | Images::Option::Blurred);
 				}
 			}
-			if (thumbnail || !_document->hasThumbnail()) {
+			if (_good || !_document->hasThumbnail()) {
 				_checked = true;
 				_documentMedia = nullptr;
 			}
@@ -101,6 +101,10 @@ Image *ReplyPreview::image(Data::FileOrigin origin) {
 					prepare(blurred, Images::Option::Blurred);
 				}
 			}
+			if (_good) {
+				_checked = true;
+				_photoMedia = nullptr;
+			}
 		}
 	}
 	return _image.get();

Telegram/SourceFiles/data/data_session.cpp

@@ -268,6 +268,18 @@ void Session::clear() {
 	_photos.clear();
 }
 
+void Session::keepAlive(std::shared_ptr<PhotoMedia> media) {
+	// NB! This allows PhotoMedia to outlive Main::Session!
+	// In case this is a problem this code should be rewritten.
+	crl::on_main(&session(), [media = std::move(media)]{});
+}
+
+void Session::keepAlive(std::shared_ptr<DocumentMedia> media) {
+	// NB! This allows DocumentMedia to outlive Main::Session!
+	// In case this is a problem this code should be rewritten.
+	crl::on_main(&session(), [media = std::move(media)] {});
+}
+
 not_null<PeerData*> Session::peer(PeerId id) {
 	const auto i = _peers.find(id);
 	if (i != _peers.cend()) {
@@ -3335,6 +3347,9 @@ void Session::registerItemView(not_null<ViewElement*> view) {
 }
 
 void Session::unregisterItemView(not_null<ViewElement*> view) {
+	Expects(!_playingVideoFiles.contains(view));
+	Expects(!_heavyViewParts.contains(view));
+
 	const auto i = _views.find(view->data());
 	if (i != end(_views)) {
 		auto &list = i->second;

Telegram/SourceFiles/data/data_session.h

@@ -63,6 +63,8 @@ class CloudThemes;
 class Streaming;
 class MediaRotation;
 class Histories;
+class DocumentMedia;
+class PhotoMedia;
 
 class Session final {
 public:
@@ -110,6 +112,9 @@ public:
 
 	void clear();
 
+	void keepAlive(std::shared_ptr<PhotoMedia> media);
+	void keepAlive(std::shared_ptr<DocumentMedia> media);
+
 	void startExport(PeerData *peer = nullptr);
 	void startExport(const MTPInputPeer &singlePeer);
 	void suggestStartExport(TimeId availableAt);

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -607,7 +607,7 @@ auto Element::verticalRepaintRange() const -> VerticalRepaintRange {
 }
 
 void Element::checkHeavyPart() {
-	if (_media && !_media->hasHeavyPart()) {
+	if (!_media || !_media->hasHeavyPart()) {
 		history()->owner().unregisterHeavyViewPart(this);
 	}
 }
@@ -746,7 +746,7 @@ void Element::clickHandlerPressedChanged(
 
 Element::~Element() {
 	// Delete media while owner still exists.
-	_media = nullptr;
+	base::take(_media);
 	if (_data->mainView() == this) {
 		_data->clearMainView();
 	}

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

@@ -86,7 +86,7 @@ Document::Document(
 
 Document::~Document() {
 	if (_dataMedia) {
-		_dataMedia = nullptr;
+		_data->owner().keepAlive(base::take(_dataMedia));
 		_parent->checkHeavyPart();
 	}
 }

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

@@ -101,7 +101,9 @@ Gif::~Gif() {
 			_data->owner().streaming().keepAlive(_data);
 			setStreamed(nullptr);
 		}
-		_dataMedia = nullptr;
+		if (_dataMedia) {
+			_data->owner().keepAlive(base::take(_dataMedia));
+		}
 		_parent->checkHeavyPart();
 	}
 }
@@ -479,7 +481,8 @@ void Gif::draw(Painter &p, const QRect &r, TextSelection selection, crl::time ms
 			auto over = _animation->a_thumbOver.value(1.);
 			p.setBrush(anim::brush(st::msgDateImgBg, st::msgDateImgBgOver, over));
 		} else {
-			auto over = ClickHandler::showAsActive(_data->loading() ? _cancell : _savel);
+			const auto over = ClickHandler::showAsActive(
+				(_data->loading() || _data->uploading()) ? _cancell : _savel);
 			p.setBrush(over ? st::msgDateImgBgOver : st::msgDateImgBg);
 		}
 		p.setOpacity(radialOpacity * p.opacity());
@@ -1013,7 +1016,8 @@ void Gif::drawGrouped(
 			auto over = _animation->a_thumbOver.value(1.);
 			p.setBrush(anim::brush(st::msgDateImgBg, st::msgDateImgBgOver, over));
 		} else {
-			auto over = ClickHandler::showAsActive(_data->loading() ? _cancell : _savel);
+			auto over = ClickHandler::showAsActive(
+				(_data->loading() || _data->uploading()) ? _cancell : _savel);
 			p.setBrush(over ? st::msgDateImgBgOver : st::msgDateImgBg);
 		}
 		p.setOpacity(radialOpacity * p.opacity());

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

@@ -63,7 +63,7 @@ GroupedMedia::GroupedMedia(
 
 GroupedMedia::~GroupedMedia() {
 	// Destroy all parts while the media object is still not destroyed.
-	base::take(_parts).clear();
+	base::take(_parts);
 }
 
 QSize GroupedMedia::countOptimalSize() {

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

@@ -24,8 +24,6 @@ constexpr auto kMaxForwardedBarLines = 4;
 
 } // namespace
 
-UnwrappedMedia::Content::~Content() = default;
-
 UnwrappedMedia::UnwrappedMedia(
 	not_null<Element*> parent,
 	std::unique_ptr<Content> content)

Telegram/SourceFiles/history/view/media/history_view_media_unwrapped.h

@@ -47,7 +47,7 @@ public:
 		[[nodiscard]] virtual bool alwaysShowOutTimestamp() {
 			return false;
 		}
-		virtual ~Content() = 0;
+		virtual ~Content() = default;
 	};
 
 	UnwrappedMedia(

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

@@ -14,6 +14,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/history_view_element.h"
 #include "history/view/history_view_cursor_state.h"
 #include "history/view/media/history_view_media_common.h"
+#include "main/main_session.h"
 #include "ui/image/image.h"
 #include "ui/grouped_layout.h"
 #include "data/data_session.h"
@@ -54,7 +55,7 @@ Photo::Photo(
 
 Photo::~Photo() {
 	if (_dataMedia) {
-		_dataMedia = nullptr;
+		_data->owner().keepAlive(base::take(_dataMedia));
 		_parent->checkHeavyPart();
 	}
 }

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

@@ -67,7 +67,9 @@ Sticker::Sticker(
 Sticker::~Sticker() {
 	if (_lottie || _dataMedia) {
 		unloadLottie();
-		_dataMedia = nullptr;
+		if (_dataMedia) {
+			_data->owner().keepAlive(base::take(_dataMedia));
+		}
 		_parent->checkHeavyPart();
 	}
 }

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

@@ -42,7 +42,7 @@ ThemeDocument::ThemeDocument(
 
 ThemeDocument::~ThemeDocument() {
 	if (_dataMedia) {
-		_dataMedia = nullptr;
+		_data->owner().keepAlive(base::take(_dataMedia));
 		_parent->checkHeavyPart();
 	}
 }

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

@@ -820,7 +820,7 @@ QString WebPage::displayedSiteName() const {
 WebPage::~WebPage() {
 	history()->owner().unregisterWebPageView(_data, _parent);
 	if (_photoMedia) {
-		_photoMedia = nullptr;
+		history()->owner().keepAlive(base::take(_photoMedia));
 		_parent->checkHeavyPart();
 	}
 }