/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.

For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "media/view/media_view_overlay_widget.h"

#include "apiwrap.h"
#include "lang/lang_keys.h"
#include "mainwidget.h"
#include "mainwindow.h"
#include "core/application.h"
#include "core/file_utilities.h"
#include "core/mime_type.h"
#include "ui/widgets/popup_menu.h"
#include "ui/widgets/buttons.h"
#include "ui/image/image.h"
#include "ui/text_options.h"
#include "boxes/confirm_box.h"
#include "media/audio/media_audio.h"
#include "media/view/media_view_playback_controls.h"
#include "media/view/media_view_group_thumbs.h"
#include "media/streaming/media_streaming_player.h"
#include "media/streaming/media_streaming_loader.h"
#include "media/player/media_player_instance.h"
#include "lottie/lottie_animation.h"
#include "history/history.h"
#include "history/history_message.h"
#include "data/data_media_types.h"
#include "data/data_session.h"
#include "data/data_channel.h"
#include "data/data_chat.h"
#include "data/data_user.h"
#include "window/themes/window_theme_preview.h"
#include "window/window_peer_menu.h"
#include "observer_peer.h"
#include "auth_session.h"
#include "layout.h"
#include "storage/file_download.h"
#include "lottie/lottie_animation.h"
#include "calls/calls_instance.h"
#include "styles/style_mediaview.h"
#include "styles/style_history.h"

namespace Media {
namespace View {
namespace {

constexpr auto kGoodThumbnailQuality = 87;
constexpr auto kWaitingFastDuration = crl::time(200);
constexpr auto kWaitingShowDuration = crl::time(500);
constexpr auto kWaitingShowDelay = crl::time(500);
constexpr auto kPreloadCount = 4;

// macOS OpenGL renderer fails to render larger texture
// even though it reports that max texture size is 16384.
constexpr auto kMaxDisplayImageSize = 4096;

// Preload X message ids before and after current.
constexpr auto kIdsLimit = 48;

// Preload next messages if we went further from current than that.
constexpr auto kIdsPreloadAfter = 28;

Images::Options VideoThumbOptions(not_null<DocumentData*> document) {
	const auto result = Images::Option::Smooth | Images::Option::Blurred;
	return (document && document->isVideoMessage())
		? (result | Images::Option::Circled)
		: result;
}

void PaintImageProfile(QPainter &p, const QImage &image, QRect rect, QRect fill) {
	const auto argb = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
	const auto rgb = image.convertToFormat(QImage::Format_RGB32);
	const auto argbp = QPixmap::fromImage(argb);
	const auto rgbp = QPixmap::fromImage(rgb);
	const auto width = image.width();
	const auto height = image.height();
	const auto xcopies = (fill.width() + width - 1) / width;
	const auto ycopies = (fill.height() + height - 1) / height;
	const auto copies = xcopies * ycopies;
	auto times = QStringList();
	const auto bench = [&](QString label, auto &&paint) {
		const auto single = [&](QString label) {
			auto now = crl::now();
			const auto push = [&] {
				times.push_back(QString("%1").arg(crl::now() - now, 4, 10, QChar(' ')));
				now = crl::now();
			};
			paint(rect);
			push();
			{
				PainterHighQualityEnabler hq(p);
				paint(rect);
			}
			push();
			for (auto i = 0; i < xcopies; ++i) {
				for (auto j = 0; j < ycopies; ++j) {
					paint(QRect(
						fill.topLeft() + QPoint(i * width, j * height),
						QSize(width, height)));
				}
			}
			push();
			LOG(("FRAME (%1): %2 (copies: %3)").arg(label).arg(times.join(' ')).arg(copies));
			times = QStringList();
			now = crl::now();
		};
		p.setCompositionMode(QPainter::CompositionMode_Source);
		single(label + " S");
		p.setCompositionMode(QPainter::CompositionMode_SourceOver);
		single(label + " O");
	};
	bench("ARGB I", [&](QRect rect) {
		p.drawImage(rect, argb);
	});
	bench("RGB  I", [&](QRect rect) {
		p.drawImage(rect, rgb);
	});
	bench("ARGB P", [&](QRect rect) {
		p.drawPixmap(rect, argbp);
	});
	bench("RGB  P", [&](QRect rect) {
		p.drawPixmap(rect, rgbp);
	});
}

QPixmap PrepareStaticImage(const QString &path) {
	auto image = App::readImage(path, nullptr, false);
#if defined Q_OS_MAC && !defined OS_MAC_OLD
	if (image.width() > kMaxDisplayImageSize
		|| image.height() > kMaxDisplayImageSize) {
		image = image.scaled(
			kMaxDisplayImageSize,
			kMaxDisplayImageSize,
			Qt::KeepAspectRatio,
			Qt::SmoothTransformation);
	}
#endif // Q_OS_MAC && !OS_MAC_OLD
	return App::pixmapFromImageInPlace(std::move(image));
}

} // namespace

struct OverlayWidget::SharedMedia {
	SharedMedia(SharedMediaKey key) : key(key) {
	}

	SharedMediaKey key;
	rpl::lifetime lifetime;
};

struct OverlayWidget::UserPhotos {
	UserPhotos(UserPhotosKey key) : key(key) {
	}

	UserPhotosKey key;
	rpl::lifetime lifetime;
};

struct OverlayWidget::Collage {
	Collage(CollageKey key) : key(key) {
	}

	CollageKey key;
};

struct OverlayWidget::Streamed {
	template <typename Callback>
	Streamed(
		not_null<Data::Session*> owner,
		std::unique_ptr<Streaming::Loader> loader,
		QWidget *controlsParent,
		not_null<PlaybackControls::Delegate*> controlsDelegate,
		Callback &&loadingCallback);

	Streaming::Player player;
	Streaming::Information info;
	PlaybackControls controls;

	bool waiting = false;
	Ui::InfiniteRadialAnimation radial;
	Ui::Animations::Simple fading;
	base::Timer timer;
	QImage frameForDirectPaint;

	bool withSound = false;
	bool pausedBySeek = false;
	bool resumeOnCallEnd = false;
};

struct OverlayWidget::LottieFile {
	LottieFile(std::unique_ptr<Lottie::Animation> data);

	std::unique_ptr<Lottie::Animation> data;
};

template <typename Callback>
OverlayWidget::Streamed::Streamed(
	not_null<Data::Session*> owner,
	std::unique_ptr<Streaming::Loader> loader,
	QWidget *controlsParent,
	not_null<PlaybackControls::Delegate*> controlsDelegate,
	Callback &&loadingCallback)
: player(owner, std::move(loader))
, controls(controlsParent, controlsDelegate)
, radial(
	std::forward<Callback>(loadingCallback),
	st::mediaviewStreamingRadial) {
}

OverlayWidget::LottieFile::LottieFile(
	std::unique_ptr<Lottie::Animation> data)
: data(std::move(data)) {
}

OverlayWidget::OverlayWidget()
: OverlayParent(nullptr)
, _transparentBrush(style::transparentPlaceholderBrush())
, _docDownload(this, lang(lng_media_download), st::mediaviewFileLink)
, _docSaveAs(this, lang(lng_mediaview_save_as), st::mediaviewFileLink)
, _docCancel(this, lang(lng_cancel), st::mediaviewFileLink)
, _radial([=](crl::time now) { return radialAnimationCallback(now); })
, _lastAction(-st::mediaviewDeltaFromLastAction, -st::mediaviewDeltaFromLastAction)
, _stateAnimation([=](crl::time now) { return stateAnimationCallback(now); })
, _dropdown(this, st::mediaviewDropdownMenu)
, _dropdownShowTimer(this) {
	subscribe(Lang::Current().updated(), [this] { refreshLang(); });

	setWindowIcon(Window::CreateIcon());
	setWindowTitle(qsl("Media viewer"));

	TextCustomTagsMap custom;
	custom.insert(QChar('c'), qMakePair(textcmdStartLink(1), textcmdStopLink()));
	_saveMsgText.setRichText(st::mediaviewSaveMsgStyle, lang(lng_mediaview_saved), Ui::DialogTextOptions(), custom);
	_saveMsg = QRect(0, 0, _saveMsgText.maxWidth() + st::mediaviewSaveMsgPadding.left() + st::mediaviewSaveMsgPadding.right(), st::mediaviewSaveMsgStyle.font->height + st::mediaviewSaveMsgPadding.top() + st::mediaviewSaveMsgPadding.bottom());
	_saveMsgText.setLink(1, std::make_shared<LambdaClickHandler>([this] { showSaveMsgFile(); }));

	connect(QApplication::desktop(), SIGNAL(resized(int)), this, SLOT(onScreenResized(int)));

	// While we have one mediaview for all authsessions we have to do this.
	auto handleAuthSessionChange = [this] {
		if (AuthSession::Exists()) {
			subscribe(Auth().downloaderTaskFinished(), [this] {
				if (!isHidden()) {
					updateControls();
				}
			});
			subscribe(Auth().calls().currentCallChanged(), [this](Calls::Call *call) {
				if (!_streamed) {
					return;
				}
				if (call) {
					playbackPauseOnCall();
				} else {
					playbackResumeOnCall();
				}
			});
			subscribe(Auth().documentUpdated, [this](DocumentData *document) {
				if (!isHidden()) {
					documentUpdated(document);
				}
			});
			subscribe(Auth().messageIdChanging, [this](std::pair<not_null<HistoryItem*>, MsgId> update) {
				changingMsgId(update.first, update.second);
			});
		} else {
			_sharedMedia = nullptr;
			_userPhotos = nullptr;
			_collage = nullptr;
		}
	};
	subscribe(Core::App().authSessionChanged(), [handleAuthSessionChange] {
		handleAuthSessionChange();
	});
	handleAuthSessionChange();

#ifdef Q_OS_LINUX
	setWindowFlags(Qt::FramelessWindowHint | Qt::MaximizeUsingFullscreenGeometryHint);
#else // Q_OS_LINUX
	setWindowFlags(Qt::FramelessWindowHint);
#endif // Q_OS_LINUX
	moveToScreen();
	setAttribute(Qt::WA_NoSystemBackground, true);
	setAttribute(Qt::WA_TranslucentBackground, true);
	setMouseTracking(true);

	hide();
	createWinId();
	if (cPlatform() == dbipLinux32 || cPlatform() == dbipLinux64) {
		windowHandle()->setTransientParent(App::wnd()->windowHandle());
		setWindowModality(Qt::WindowModal);
	}
	if (cPlatform() != dbipMac && cPlatform() != dbipMacOld) {
		setWindowState(Qt::WindowFullScreen);
	}

	_saveMsgUpdater.setSingleShot(true);
	connect(&_saveMsgUpdater, SIGNAL(timeout()), this, SLOT(updateImage()));

	setAttribute(Qt::WA_AcceptTouchEvents);
	_touchTimer.setSingleShot(true);
	connect(&_touchTimer, SIGNAL(timeout()), this, SLOT(onTouchTimer()));

	_controlsHideTimer.setSingleShot(true);
	connect(&_controlsHideTimer, SIGNAL(timeout()), this, SLOT(onHideControls()));

	connect(_docDownload, SIGNAL(clicked()), this, SLOT(onDownload()));
	connect(_docSaveAs, SIGNAL(clicked()), this, SLOT(onSaveAs()));
	connect(_docCancel, SIGNAL(clicked()), this, SLOT(onSaveCancel()));

	_dropdown->setHiddenCallback([this] { dropdownHidden(); });
	_dropdownShowTimer->setSingleShot(true);
	connect(_dropdownShowTimer, SIGNAL(timeout()), this, SLOT(onDropdown()));
}

void OverlayWidget::refreshLang() {
	InvokeQueued(this, [this] { updateThemePreviewGeometry(); });
}

void OverlayWidget::moveToScreen(bool force) {
	const auto widgetScreen = [&](auto &&widget) -> QScreen* {
		if (auto handle = widget ? widget->windowHandle() : nullptr) {
			return handle->screen();
		}
		return nullptr;
	};
	const auto activeWindow = Core::App().getActiveWindow();
	const auto activeWindowScreen = widgetScreen(activeWindow);
	const auto myScreen = widgetScreen(this);
	if (activeWindowScreen && myScreen && myScreen != activeWindowScreen) {
		windowHandle()->setScreen(activeWindowScreen);
	}
	const auto screen = activeWindowScreen
		? activeWindowScreen
		: QApplication::primaryScreen();
	const auto available = screen->geometry();
	if (!force && geometry() == available) {
		return;
	}
	setGeometry(available);

	auto navSkip = 2 * st::mediaviewControlMargin + st::mediaviewControlSize;
	_closeNav = myrtlrect(width() - st::mediaviewControlMargin - st::mediaviewControlSize, st::mediaviewControlMargin, st::mediaviewControlSize, st::mediaviewControlSize);
	_closeNavIcon = centerrect(_closeNav, st::mediaviewClose);
	_leftNav = myrtlrect(st::mediaviewControlMargin, navSkip, st::mediaviewControlSize, height() - 2 * navSkip);
	_leftNavIcon = centerrect(_leftNav, st::mediaviewLeft);
	_rightNav = myrtlrect(width() - st::mediaviewControlMargin - st::mediaviewControlSize, navSkip, st::mediaviewControlSize, height() - 2 * navSkip);
	_rightNavIcon = centerrect(_rightNav, st::mediaviewRight);

	_saveMsg.moveTo((width() - _saveMsg.width()) / 2, (height() - _saveMsg.height()) / 2);
	_photoRadialRect = QRect(QPoint((width() - st::radialSize.width()) / 2, (height() - st::radialSize.height()) / 2), st::radialSize);

	resizeContentByScreenSize();
	update();
}

bool OverlayWidget::videoShown() const {
	return _streamed && !_streamed->info.video.cover.isNull();
}

QSize OverlayWidget::videoSize() const {
	Expects(videoShown());

	return _streamed->info.video.size;
}

bool OverlayWidget::videoIsGifv() const {
	return _streamed && _doc->isAnimation() && !_doc->isVideoMessage();
}

QImage OverlayWidget::videoFrame() const {
	Expects(videoShown());

	auto request = Streaming::FrameRequest();
	//request.radius = (_doc && _doc->isVideoMessage())
	//	? ImageRoundRadius::Ellipse
	//	: ImageRoundRadius::None;
	return _streamed->player.ready()
		? _streamed->player.frame(request)
		: _streamed->info.video.cover;
}

QImage OverlayWidget::videoFrameForDirectPaint() const {
	Expects(_streamed != nullptr);

	const auto result = videoFrame();

#ifdef USE_OPENGL_OVERLAY_WIDGET
	const auto bytesPerLine = result.bytesPerLine();
	if (bytesPerLine == result.width() * 4) {
		return result;
	}

	// On macOS 10.8+ we use QOpenGLWidget as OverlayWidget base class.
	// The OpenGL painter can't paint textures where byte data is with strides.
	// So in that case we prepare a compact copy of the frame to render.
	//
	// See Qt commit ed557c037847e343caa010562952b398f806adcd
	//
	auto &cache = _streamed->frameForDirectPaint;
	if (cache.size() != result.size()) {
		cache = QImage(result.size(), result.format());
	}
	const auto height = result.height();
	const auto line = cache.bytesPerLine();
	Assert(line == result.width() * 4);
	Assert(line < bytesPerLine);

	auto from = result.bits();
	auto to = cache.bits();
	for (auto y = 0; y != height; ++y) {
		memcpy(to, from, line);
		to += line;
		from += bytesPerLine;
	}
	return cache;
#endif // USE_OPENGL_OVERLAY_WIDGET

	return result;
}

bool OverlayWidget::documentContentShown() const {
	return _doc && (!_current.isNull() || videoShown());
}

bool OverlayWidget::documentBubbleShown() const {
	return (!_photo && !_doc)
		|| (_doc
			&& !_themePreviewShown
			&& !_streamed
			&& !_lottie
			&& _current.isNull());
}

void OverlayWidget::clearStreaming() {
	_fullScreenVideo = false;
	_streamed = nullptr;
}

void OverlayWidget::clearLottie() {
	_lottie = nullptr;
}

void OverlayWidget::documentUpdated(DocumentData *doc) {
	if (documentBubbleShown() && _doc && _doc == doc) {
		if ((_doc->loading() && _docCancel->isHidden()) || (!_doc->loading() && !_docCancel->isHidden())) {
			updateControls();
		} else if (_doc->loading()) {
			updateDocSize();
			update(_docRect);
		}
	}
}

void OverlayWidget::changingMsgId(not_null<HistoryItem*> row, MsgId newId) {
	if (row->fullId() == _msgid) {
		_msgid = FullMsgId(_msgid.channel, newId);
		refreshMediaViewer();
	}
}

void OverlayWidget::updateDocSize() {
	if (!_doc || !documentBubbleShown()) return;

	if (_doc->loading()) {
		quint64 ready = _doc->loadOffset(), total = _doc->size;
		QString readyStr, totalStr, mb;
		if (total >= 1024 * 1024) { // more than 1 mb
			qint64 readyTenthMb = (ready * 10 / (1024 * 1024)), totalTenthMb = (total * 10 / (1024 * 1024));
			readyStr = QString::number(readyTenthMb / 10) + '.' + QString::number(readyTenthMb % 10);
			totalStr = QString::number(totalTenthMb / 10) + '.' + QString::number(totalTenthMb % 10);
			mb = qsl("MB");
		} else if (total >= 1024) {
			qint64 readyKb = (ready / 1024), totalKb = (total / 1024);
			readyStr = QString::number(readyKb);
			totalStr = QString::number(totalKb);
			mb = qsl("KB");
		} else {
			readyStr = QString::number(ready);
			totalStr = QString::number(total);
			mb = qsl("B");
		}
		_docSize = lng_media_save_progress(lt_ready, readyStr, lt_total, totalStr, lt_mb, mb);
	} else {
		_docSize = formatSizeText(_doc->size);
	}
	_docSizeWidth = st::mediaviewFont->width(_docSize);
	int32 maxw = st::mediaviewFileSize.width() - st::mediaviewFileIconSize - st::mediaviewFilePadding * 3;
	if (_docSizeWidth > maxw) {
		_docSize = st::mediaviewFont->elided(_docSize, maxw);
		_docSizeWidth = st::mediaviewFont->width(_docSize);
	}
}

void OverlayWidget::refreshNavVisibility() {
	if (_sharedMediaData) {
		_leftNavVisible = _index && (*_index > 0);
		_rightNavVisible = _index && (*_index + 1 < _sharedMediaData->size());
	} else if (_userPhotosData) {
		_leftNavVisible = _index && (*_index > 0);
		_rightNavVisible = _index && (*_index + 1 < _userPhotosData->size());
	} else if (_collageData) {
		_leftNavVisible = _index && (*_index > 0);
		_rightNavVisible = _index && (*_index + 1 < _collageData->items.size());
	} else {
		_leftNavVisible = false;
		_rightNavVisible = false;
	}
}

void OverlayWidget::updateControls() {
	if (_doc && documentBubbleShown()) {
		if (_doc->loading()) {
			_docDownload->hide();
			_docSaveAs->hide();
			_docCancel->moveToLeft(_docRect.x() + 2 * st::mediaviewFilePadding + st::mediaviewFileIconSize, _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileLinksTop);
			_docCancel->show();
		} else {
			if (_doc->loaded(DocumentData::FilePathResolve::Checked)) {
				_docDownload->hide();
				_docSaveAs->moveToLeft(_docRect.x() + 2 * st::mediaviewFilePadding + st::mediaviewFileIconSize, _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileLinksTop);
				_docSaveAs->show();
				_docCancel->hide();
			} else {
				_docDownload->moveToLeft(_docRect.x() + 2 * st::mediaviewFilePadding + st::mediaviewFileIconSize, _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileLinksTop);
				_docDownload->show();
				_docSaveAs->moveToLeft(_docRect.x() + 2.5 * st::mediaviewFilePadding + st::mediaviewFileIconSize + _docDownload->width(), _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileLinksTop);
				_docSaveAs->show();
				_docCancel->hide();
			}
		}
		updateDocSize();
	} else {
		_docDownload->hide();
		_docSaveAs->hide();
		_docCancel->hide();
	}
	radialStart();

	updateThemePreviewGeometry();

	_saveVisible = (_photo && _photo->loaded())
		|| (_doc && _doc->filepath(DocumentData::FilePathResolve::Checked).isEmpty());
	_saveNav = myrtlrect(width() - st::mediaviewIconSize.width() * 2, height() - st::mediaviewIconSize.height(), st::mediaviewIconSize.width(), st::mediaviewIconSize.height());
	_saveNavIcon = centerrect(_saveNav, st::mediaviewSave);
	_moreNav = myrtlrect(width() - st::mediaviewIconSize.width(), height() - st::mediaviewIconSize.height(), st::mediaviewIconSize.width(), st::mediaviewIconSize.height());
	_moreNavIcon = centerrect(_moreNav, st::mediaviewMore);

	const auto dNow = QDateTime::currentDateTime();
	const auto d = [&] {
		if (const auto item = Auth().data().message(_msgid)) {
			return ItemDateTime(item);
		} else if (_photo) {
			return ParseDateTime(_photo->date);
		} else if (_doc) {
			return ParseDateTime(_doc->date);
		}
		return dNow;
	}();
	if (d.date() == dNow.date()) {
		_dateText = lng_mediaview_today(lt_time, d.time().toString(cTimeFormat()));
	} else if (d.date().addDays(1) == dNow.date()) {
		_dateText = lng_mediaview_yesterday(lt_time, d.time().toString(cTimeFormat()));
	} else {
		_dateText = lng_mediaview_date_time(lt_date, d.date().toString(qsl("dd.MM.yy")), lt_time, d.time().toString(cTimeFormat()));
	}
	if (!_fromName.isEmpty()) {
		_fromNameLabel.setText(st::mediaviewTextStyle, _fromName, Ui::NameTextOptions());
		_nameNav = myrtlrect(st::mediaviewTextLeft, height() - st::mediaviewTextTop, qMin(_fromNameLabel.maxWidth(), width() / 3), st::mediaviewFont->height);
		_dateNav = myrtlrect(st::mediaviewTextLeft + _nameNav.width() + st::mediaviewTextSkip, height() - st::mediaviewTextTop, st::mediaviewFont->width(_dateText), st::mediaviewFont->height);
	} else {
		_nameNav = QRect();
		_dateNav = myrtlrect(st::mediaviewTextLeft, height() - st::mediaviewTextTop, st::mediaviewFont->width(_dateText), st::mediaviewFont->height);
	}
	updateHeader();
	refreshNavVisibility();
	resizeCenteredControls();

	updateOver(mapFromGlobal(QCursor::pos()));
	update();
}

void OverlayWidget::resizeCenteredControls() {
	const auto bottomSkip = std::max(
		_dateNav.left() + _dateNav.width(),
		_headerNav.left() + _headerNav.width())
		+ st::mediaviewCaptionMargin.width();
	_groupThumbsAvailableWidth = std::max(
		width() - 2 * bottomSkip,
		st::msgMinWidth
		+ st::mediaviewCaptionPadding.left()
		+ st::mediaviewCaptionPadding.right());
	_groupThumbsLeft = (width() - _groupThumbsAvailableWidth) / 2;
	refreshGroupThumbs();
	_groupThumbsTop = _groupThumbs ? (height() - _groupThumbs->height()) : 0;

	refreshClipControllerGeometry();
	refreshCaptionGeometry();
}

void OverlayWidget::refreshCaptionGeometry() {
	if (_caption.isEmpty()) {
		_captionRect = QRect();
		return;
	}

	if (_groupThumbs && _groupThumbs->hiding()) {
		_groupThumbs = nullptr;
		_groupThumbsRect = QRect();
	}
	const auto captionBottom = (_streamed && !videoIsGifv())
		? (_streamed->controls.y() - st::mediaviewCaptionMargin.height())
		: _groupThumbs
		? _groupThumbsTop
		: height() - st::mediaviewCaptionMargin.height();
	const auto captionWidth = std::min(
		_groupThumbsAvailableWidth
		- st::mediaviewCaptionPadding.left()
		- st::mediaviewCaptionPadding.right(),
		_caption.maxWidth());
	const auto captionHeight = std::min(
		_caption.countHeight(captionWidth),
		height() / 4
		- st::mediaviewCaptionPadding.top()
		- st::mediaviewCaptionPadding.bottom()
		- 2 * st::mediaviewCaptionMargin.height());
	_captionRect = QRect(
		(width() - captionWidth) / 2,
		captionBottom
		- captionHeight
		- st::mediaviewCaptionPadding.bottom(),
		captionWidth,
		captionHeight);
}

void OverlayWidget::updateActions() {
	_actions.clear();

	if (_doc && _doc->loading()) {
		_actions.push_back({ lang(lng_cancel), SLOT(onSaveCancel()) });
	}
	if (IsServerMsgId(_msgid.msg)) {
		_actions.push_back({ lang(lng_context_to_msg), SLOT(onToMessage()) });
	}
	if (_doc && !_doc->filepath(DocumentData::FilePathResolve::Checked).isEmpty()) {
		_actions.push_back({ lang((cPlatform() == dbipMac || cPlatform() == dbipMacOld) ? lng_context_show_in_finder : lng_context_show_in_folder), SLOT(onShowInFolder()) });
	}
	if ((_doc && documentContentShown()) || (_photo && _photo->loaded())) {
		_actions.push_back({ lang(lng_mediaview_copy), SLOT(onCopy()) });
	}
	if (_photo && _photo->hasSticker) {
		_actions.push_back({ lang(lng_context_attached_stickers), SLOT(onAttachedStickers()) });
	}
	if (_canForwardItem) {
		_actions.push_back({ lang(lng_mediaview_forward), SLOT(onForward()) });
	}
	auto canDelete = [&] {
		if (_canDeleteItem) {
			return true;
		} else if (!_msgid && _photo && _user && _user == Auth().user()) {
			return _userPhotosData && _fullIndex && _fullCount;
		} else if (_photo && _photo->peer && _photo->peer->userpicPhotoId() == _photo->id) {
			if (auto chat = _photo->peer->asChat()) {
				return chat->canEditInformation();
			} else if (auto channel = _photo->peer->asChannel()) {
				return channel->canEditInformation();
			}
		}
		return false;
	}();
	if (canDelete) {
		_actions.push_back({ lang(lng_mediaview_delete), SLOT(onDelete()) });
	}
	_actions.push_back({ lang(lng_mediaview_save_as), SLOT(onSaveAs()) });

	if (const auto overviewType = computeOverviewType()) {
		_actions.push_back({ lang(_doc ? lng_mediaview_files_all : lng_mediaview_photos_all), SLOT(onOverview()) });
	}
}

auto OverlayWidget::computeOverviewType() const
-> std::optional<SharedMediaType> {
	if (const auto mediaType = sharedMediaType()) {
		if (const auto overviewType = SharedMediaOverviewType(*mediaType)) {
			return overviewType;
		} else if (mediaType == SharedMediaType::PhotoVideo) {
			if (_photo) {
				return SharedMediaOverviewType(SharedMediaType::Photo);
			} else if (_doc) {
				return SharedMediaOverviewType(SharedMediaType::Video);
			}
		}
	}
	return std::nullopt;
}

bool OverlayWidget::stateAnimationCallback(crl::time now) {
	if (anim::Disabled()) {
		now += st::mediaviewShowDuration + st::mediaviewHideDuration;
	}
	for (auto i = begin(_animations); i != end(_animations);) {
		const auto [state, started] = *i;
		updateOverRect(state);
		const auto dt = float64(now - started) / st::mediaviewFadeDuration;
		if (dt >= 1) {
			_animationOpacities.erase(state);
			i = _animations.erase(i);
		} else {
			_animationOpacities[state].update(dt, anim::linear);
			++i;
		}
	}
	return !_animations.empty() || updateControlsAnimation(now);
}

bool OverlayWidget::updateControlsAnimation(crl::time now) {
	if (_controlsState != ControlsShowing
		&& _controlsState != ControlsHiding) {
		return false;
	}
	const auto duration = (_controlsState == ControlsShowing)
		? st::mediaviewShowDuration
		: st::mediaviewHideDuration;
	const auto dt = float64(now - _controlsAnimStarted)
		/ duration;
	if (dt >= 1) {
		_controlsOpacity.finish();
		_controlsState = (_controlsState == ControlsShowing)
			? ControlsShown
			: ControlsHidden;
		updateCursor();
	} else {
		_controlsOpacity.update(dt, anim::linear);
	}
	const auto toUpdate = QRegion()
		+ (_over == OverLeftNav ? _leftNav : _leftNavIcon)
		+ (_over == OverRightNav ? _rightNav : _rightNavIcon)
		+ (_over == OverClose ? _closeNav : _closeNavIcon)
		+ _saveNavIcon
		+ _moreNavIcon
		+ _headerNav
		+ _nameNav
		+ _dateNav
		+ _captionRect.marginsAdded(st::mediaviewCaptionPadding)
		+ _groupThumbsRect;
	update(toUpdate);
	return (dt < 1);
}

void OverlayWidget::waitingAnimationCallback() {
	if (!anim::Disabled()) {
		update(radialRect());
	}
}

void OverlayWidget::updateCursor() {
	setCursor(_controlsState == ControlsHidden
		? Qt::BlankCursor
		: (_over == OverNone ? style::cur_default : style::cur_pointer));
}

QRect OverlayWidget::contentRect() const {
	return { _x, _y, _w, _h };
}

void OverlayWidget::contentSizeChanged() {
	_width = _w;
	_height = _h;
	resizeContentByScreenSize();
}

void OverlayWidget::resizeContentByScreenSize() {
	if (_w > 0 && _h > 0) {
		_zoomToScreen = float64(width()) / _w;
		if (_h * _zoomToScreen > height()) {
			_zoomToScreen = float64(height()) / _h;
		}
		if (_zoomToScreen >= 1.) {
			_zoomToScreen -= 1.;
		} else {
			_zoomToScreen = 1. - (1. / _zoomToScreen);
		}
	} else {
		_zoomToScreen = 0;
	}
	if ((_w > width()) || (_h > height()) || _fullScreenVideo) {
		_zoom = ZoomToScreenLevel;
		if (_zoomToScreen >= 0) {
			_w = qRound(_w * (_zoomToScreen + 1));
			_h = qRound(_h * (_zoomToScreen + 1));
		} else {
			_w = qRound(_w / (-_zoomToScreen + 1));
			_h = qRound(_h / (-_zoomToScreen + 1));
		}
	} else {
		_zoom = 0;
		_w = _width;
		_h = _height;
	}
	_x = (width() - _w) / 2;
	_y = (height() - _h) / 2;
}

float64 OverlayWidget::radialProgress() const {
	if (_doc) {
		return _doc->progress();
	} else if (_photo) {
		return _photo->large()->progress();
	}
	return 1.;
}

bool OverlayWidget::radialLoading() const {
	if (_doc) {
		return _doc->loading() && !_streamed;
	} else if (_photo) {
		return _photo->large()->loading();
	}
	return false;
}

QRect OverlayWidget::radialRect() const {
	if (_photo) {
		return _photoRadialRect;
	} else if (_doc) {
		return QRect(
			QPoint(
				_docIconRect.x() + ((_docIconRect.width() - st::radialSize.width()) / 2),
				_docIconRect.y() + ((_docIconRect.height() - st::radialSize.height()) / 2)),
			st::radialSize);
	}
	return QRect();
}

void OverlayWidget::radialStart() {
	if (radialLoading() && !_radial.animating()) {
		_radial.start(radialProgress());
		if (auto shift = radialTimeShift()) {
			_radial.update(radialProgress(), !radialLoading(), crl::now() + shift);
		}
	}
}

crl::time OverlayWidget::radialTimeShift() const {
	return _photo ? st::radialDuration : 0;
}

bool OverlayWidget::radialAnimationCallback(crl::time now) {
	if ((!_doc && !_photo) || _streamed) {
		return false;
	}
	const auto wasAnimating = _radial.animating();
	const auto updated = _radial.update(
		radialProgress(),
		!radialLoading(),
		now + radialTimeShift());
	if ((wasAnimating || _radial.animating())
		&& (!anim::Disabled() || updated)) {
		update(radialRect());
	}
	const auto ready = _doc && _doc->loaded();
	const auto streamVideo = ready && _doc->canBePlayed();
	const auto tryOpenImage = ready && (_doc->size < App::kImageSizeLimit);
	if (ready && ((tryOpenImage && !_radial.animating()) || streamVideo)) {
		_streamingStartPaused = false;
		if (streamVideo) {
			redisplayContent();
		} else {
			auto &location = _doc->location(true);
			if (location.accessEnable()) {
				if (_doc->isTheme()
					|| QImageReader(location.name()).canRead()) {
					redisplayContent();
				}
				location.accessDisable();
			}
		}
	}
	return true;
}

void OverlayWidget::zoomIn() {
	int32 newZoom = _zoom;
	if (newZoom == ZoomToScreenLevel) {
		if (qCeil(_zoomToScreen) <= MaxZoomLevel) {
			newZoom = qCeil(_zoomToScreen);
		}
	} else {
		if (newZoom < _zoomToScreen && (newZoom + 1 > _zoomToScreen || (_zoomToScreen > MaxZoomLevel && newZoom == MaxZoomLevel))) {
			newZoom = ZoomToScreenLevel;
		} else if (newZoom < MaxZoomLevel) {
			++newZoom;
		}
	}
	zoomUpdate(newZoom);
}

void OverlayWidget::zoomOut() {
	int32 newZoom = _zoom;
	if (newZoom == ZoomToScreenLevel) {
		if (qFloor(_zoomToScreen) >= -MaxZoomLevel) {
			newZoom = qFloor(_zoomToScreen);
		}
	} else {
		if (newZoom > _zoomToScreen && (newZoom - 1 < _zoomToScreen || (_zoomToScreen < -MaxZoomLevel && newZoom == -MaxZoomLevel))) {
			newZoom = ZoomToScreenLevel;
		} else if (newZoom > -MaxZoomLevel) {
			--newZoom;
		}
	}
	zoomUpdate(newZoom);
}

void OverlayWidget::zoomReset() {
	int32 newZoom = _zoom;
	if (_zoom == 0) {
		if (qFloor(_zoomToScreen) == qCeil(_zoomToScreen) && qRound(_zoomToScreen) >= -MaxZoomLevel && qRound(_zoomToScreen) <= MaxZoomLevel) {
			newZoom = qRound(_zoomToScreen);
		} else {
			newZoom = ZoomToScreenLevel;
		}
	} else {
		newZoom = 0;
	}
	_x = -_width / 2;
	_y = -_height / 2;
	float64 z = (_zoom == ZoomToScreenLevel) ? _zoomToScreen : _zoom;
	if (z >= 0) {
		_x = qRound(_x * (z + 1));
		_y = qRound(_y * (z + 1));
	} else {
		_x = qRound(_x / (-z + 1));
		_y = qRound(_y / (-z + 1));
	}
	_x += width() / 2;
	_y += height() / 2;
	update();
	zoomUpdate(newZoom);
}

void OverlayWidget::zoomUpdate(int32 &newZoom) {
	if (newZoom != ZoomToScreenLevel) {
		while ((newZoom < 0 && (-newZoom + 1) > _w) || (-newZoom + 1) > _h) {
			++newZoom;
		}
	}
	setZoomLevel(newZoom);
}

void OverlayWidget::clearData() {
	if (!isHidden()) {
		hide();
	}
	if (!_animations.empty()) {
		_animations.clear();
		_stateAnimation.stop();
	}
	if (!_animationOpacities.empty()) {
		_animationOpacities.clear();
	}
	clearStreaming();
	clearLottie();
	delete _menu;
	_menu = nullptr;
	setContext(std::nullopt);
	_from = nullptr;
	_fromName = QString();
	_photo = nullptr;
	_doc = nullptr;
	_fullScreenVideo = false;
	_caption.clear();
}

OverlayWidget::~OverlayWidget() {
	delete base::take(_menu);
}

void OverlayWidget::clickHandlerActiveChanged(const ClickHandlerPtr &p, bool active) {
	setCursor((active || ClickHandler::getPressed()) ? style::cur_pointer : style::cur_default);
	update(QRegion(_saveMsg) + _captionRect);
}

void OverlayWidget::clickHandlerPressedChanged(const ClickHandlerPtr &p, bool pressed) {
	setCursor((pressed || ClickHandler::getActive()) ? style::cur_pointer : style::cur_default);
	update(QRegion(_saveMsg) + _captionRect);
}

void OverlayWidget::showSaveMsgFile() {
	File::ShowInFolder(_saveMsgFilename);
}

void OverlayWidget::updateMixerVideoVolume() const {
	if (_streamed) {
		Player::mixer()->setVideoVolume(Global::VideoVolume());
	}
}

void OverlayWidget::close() {
	Core::App().hideMediaView();
}

void OverlayWidget::activateControls() {
	if (!_menu && !_mousePressed) {
		_controlsHideTimer.start(int(st::mediaviewWaitHide));
	}
	if (_fullScreenVideo) {
		if (_streamed) {
			_streamed->controls.showAnimated();
		}
	}
	if (_controlsState == ControlsHiding || _controlsState == ControlsHidden) {
		_controlsState = ControlsShowing;
		_controlsAnimStarted = crl::now();
		_controlsOpacity.start(1);
		if (!_stateAnimation.animating()) {
			_stateAnimation.start();
		}
	}
}

void OverlayWidget::onHideControls(bool force) {
	if (!force) {
		if (!_dropdown->isHidden()
			|| _menu
			|| _mousePressed
			|| (_fullScreenVideo
				&& !videoIsGifv()
				&& _streamed->controls.geometry().contains(_lastMouseMovePos))) {
			return;
		}
	}
	if (_fullScreenVideo) {
		_streamed->controls.hideAnimated();
	}
	if (_controlsState == ControlsHiding || _controlsState == ControlsHidden) return;

	_lastMouseMovePos = mapFromGlobal(QCursor::pos());
	_controlsState = ControlsHiding;
	_controlsAnimStarted = crl::now();
	_controlsOpacity.start(0);
	if (!_stateAnimation.animating()) {
		_stateAnimation.start();
	}
}

void OverlayWidget::dropdownHidden() {
	setFocus();
	_ignoringDropdown = true;
	_lastMouseMovePos = mapFromGlobal(QCursor::pos());
	updateOver(_lastMouseMovePos);
	_ignoringDropdown = false;
	if (!_controlsHideTimer.isActive()) {
		onHideControls(true);
	}
}

void OverlayWidget::onScreenResized(int screen) {
	if (isHidden()) {
		return;
	}

	const auto screens = QApplication::screens();
	const auto changed = (screen >= 0 && screen < screens.size())
		? screens[screen]
		: nullptr;
	if (!windowHandle()
		|| !windowHandle()->screen()
		|| !changed
		|| windowHandle()->screen() == changed) {
		moveToScreen();
	}
}

void OverlayWidget::onToMessage() {
	if (const auto item = Auth().data().message(_msgid)) {
		close();
		Ui::showPeerHistoryAtItem(item);
	}
}

void OverlayWidget::onSaveAs() {
	QString file;
	if (_doc) {
		const FileLocation &location(_doc->location(true));
		if (!_doc->data().isEmpty() || location.accessEnable()) {
			QFileInfo alreadyInfo(location.name());
			QDir alreadyDir(alreadyInfo.dir());
			QString name = alreadyInfo.fileName(), filter;
			const auto mimeType = Core::MimeTypeForName(_doc->mimeString());
			QStringList p = mimeType.globPatterns();
			QString pattern = p.isEmpty() ? QString() : p.front();
			if (name.isEmpty()) {
				name = pattern.isEmpty() ? qsl(".unknown") : pattern.replace('*', QString());
			}

			if (pattern.isEmpty()) {
				filter = QString();
			} else {
				filter = mimeType.filterString() + qsl(";;") + FileDialog::AllFilesFilter();
			}

			psBringToBack(this);
			file = FileNameForSave(lang(lng_save_file), filter, qsl("doc"), name, true, alreadyDir);
			psShowOverAll(this);
			if (!file.isEmpty() && file != location.name()) {
				if (_doc->data().isEmpty()) {
					QFile(file).remove();
					QFile(location.name()).copy(file);
				} else {
					QFile f(file);
					f.open(QIODevice::WriteOnly);
					f.write(_doc->data());
				}
			}

			if (_doc->data().isEmpty()) location.accessDisable();
		} else {
			DocumentSaveClickHandler::Save(
				fileOrigin(),
				_doc,
				DocumentSaveClickHandler::Mode::ToNewFile);
			updateControls();
			updateOver(_lastMouseMovePos);
		}
	} else {
		if (!_photo || !_photo->loaded()) return;

		psBringToBack(this);
		auto filter = qsl("JPEG Image (*.jpg);;") + FileDialog::AllFilesFilter();
		FileDialog::GetWritePath(
			this,
			lang(lng_save_photo),
			filter,
			filedialogDefaultName(
				qsl("photo"),
				qsl(".jpg"),
				QString(),
				false,
				_photo->date),
			crl::guard(this, [this, photo = _photo](const QString &result) {
				if (!result.isEmpty() && _photo == photo && photo->loaded()) {
					photo->large()->original().save(result, "JPG");
				}
				psShowOverAll(this);
			}), crl::guard(this, [this] {
				psShowOverAll(this);
			}));
	}
	activateWindow();
	QApplication::setActiveWindow(this);
	setFocus();
}

void OverlayWidget::onDocClick() {
	if (_doc->loading()) {
		onSaveCancel();
	} else {
		DocumentOpenClickHandler::Open(
			fileOrigin(),
			_doc,
			Auth().data().message(_msgid));
		if (_doc->loading() && !_radial.animating()) {
			_radial.start(_doc->progress());
		}
	}
}

PeerData *OverlayWidget::ui_getPeerForMouseAction() {
	return _history ? _history->peer.get() : nullptr;
}

void OverlayWidget::onDownload() {
	if (Global::AskDownloadPath()) {
		return onSaveAs();
	}

	QString path;
	if (Global::DownloadPath().isEmpty()) {
		path = File::DefaultDownloadPath();
	} else if (Global::DownloadPath() == qsl("tmp")) {
		path = cTempDir();
	} else {
		path = Global::DownloadPath();
	}
	QString toName;
	if (_doc) {
		const auto &location = _doc->location(true);
		if (location.accessEnable()) {
			if (!QDir().exists(path)) QDir().mkpath(path);
			toName = filedialogNextFilename(
				_doc->filename(),
				location.name(),
				path);
			if (!toName.isEmpty() && toName != location.name()) {
				QFile(toName).remove();
				if (!QFile(location.name()).copy(toName)) {
					toName = QString();
				}
			}
			location.accessDisable();
		} else {
			if (_doc->filepath(DocumentData::FilePathResolve::Checked).isEmpty()) {
				DocumentSaveClickHandler::Save(
					fileOrigin(),
					_doc,
					DocumentSaveClickHandler::Mode::ToFile);
				updateControls();
			} else {
				_saveVisible = false;
				update(_saveNav);
			}
			updateOver(_lastMouseMovePos);
		}
	} else {
		if (!_photo || !_photo->loaded()) {
			_saveVisible = false;
			update(_saveNav);
		} else {
			if (!QDir().exists(path)) QDir().mkpath(path);
			toName = filedialogDefaultName(qsl("photo"), qsl(".jpg"), path);
			if (!_photo->large()->original().save(toName, "JPG")) {
				toName = QString();
			}
		}
	}
	if (!toName.isEmpty()) {
		_saveMsgFilename = toName;
		_saveMsgStarted = crl::now();
		_saveMsgOpacity.start(1);
		updateImage();
	}
}

void OverlayWidget::onSaveCancel() {
	if (_doc && _doc->loading()) {
		_doc->cancel();
		if (_doc->canBePlayed()) {
			redisplayContent();
		}
	}
}

void OverlayWidget::onShowInFolder() {
	if (!_doc) return;

	auto filepath = _doc->filepath(DocumentData::FilePathResolve::Checked);
	if (!filepath.isEmpty()) {
		File::ShowInFolder(filepath);
	}
}

void OverlayWidget::onForward() {
	auto item = Auth().data().message(_msgid);
	if (!item || !IsServerMsgId(item->id) || item->serviceMsg()) {
		return;
	}

	close();
	Window::ShowForwardMessagesBox({ 1, item->fullId() });
}

void OverlayWidget::onDelete() {
	close();
	const auto deletingPeerPhoto = [this] {
		if (!_msgid) {
			return true;
		}
		if (_photo && _history) {
			if (_history->peer->userpicPhotoId() == _photo->id) {
				return _firstOpenedPeerPhoto;
			}
		}
		return false;
	};

	if (deletingPeerPhoto()) {
		App::main()->deletePhotoLayer(_photo);
	} else if (const auto item = Auth().data().message(_msgid)) {
		const auto suggestModerateActions = true;
		Ui::show(Box<DeleteMessagesBox>(item, suggestModerateActions));
	}
}

void OverlayWidget::onOverview() {
	if (_menu) _menu->hideMenu(true);
	update();
	if (const auto overviewType = computeOverviewType()) {
		close();
		SharedMediaShowOverview(*overviewType, _history);
	}
}

void OverlayWidget::onCopy() {
	_dropdown->hideAnimated(Ui::DropdownMenu::HideOption::IgnoreShow);
	if (_doc) {
		if (videoShown()) {
			QApplication::clipboard()->setImage(
				transformVideoFrame(videoFrame()));
		} else if (!_current.isNull()) {
			QApplication::clipboard()->setPixmap(_current);
		}
	} else if (_photo && _photo->loaded()) {
		QApplication::clipboard()->setPixmap(_photo->large()->pix(fileOrigin()));
	}
}

void OverlayWidget::onAttachedStickers() {
	close();
	Auth().api().requestAttachedStickerSets(_photo);
}

std::optional<OverlayWidget::SharedMediaType> OverlayWidget::sharedMediaType() const {
	using Type = SharedMediaType;
	if (const auto item = Auth().data().message(_msgid)) {
		if (const auto media = item->media()) {
			if (media->webpage()) {
				return std::nullopt;
			}
		}
		if (_photo) {
			if (item->toHistoryMessage()) {
				return Type::PhotoVideo;
			}
			return Type::ChatPhoto;
		} else if (_doc) {
			if (_doc->isGifv()) {
				return Type::GIF;
			} else if (_doc->isVideoFile()) {
				return Type::PhotoVideo;
			}
			return Type::File;
		}
	}
	return std::nullopt;
}

std::optional<OverlayWidget::SharedMediaKey> OverlayWidget::sharedMediaKey() const {
	if (!_msgid && _peer && !_user && _photo && _peer->userpicPhotoId() == _photo->id) {
		return SharedMediaKey {
			_history->peer->id,
			_migrated ? _migrated->peer->id : 0,
			SharedMediaType::ChatPhoto,
			_peer->userpicPhotoId()
		};
	}
	if (!IsServerMsgId(_msgid.msg)) {
		return std::nullopt;
	}
	auto keyForType = [this](SharedMediaType type) -> SharedMediaKey {
		return {
			_history->peer->id,
			_migrated ? _migrated->peer->id : 0,
			type,
			(_msgid.channel == _history->channelId()) ? _msgid.msg : (_msgid.msg - ServerMaxMsgId) };
	};
	return
		sharedMediaType()
		| keyForType;
}

Data::FileOrigin OverlayWidget::fileOrigin() const {
	if (_msgid) {
		return _msgid;
	} else if (_photo && _user) {
		return Data::FileOriginUserPhoto(_user->bareId(), _photo->id);
	} else if (_photo && _peer && _peer->userpicPhotoId() == _photo->id) {
		return Data::FileOriginPeerPhoto(_peer->id);
	}
	return Data::FileOrigin();
}

bool OverlayWidget::validSharedMedia() const {
	if (auto key = sharedMediaKey()) {
		if (!_sharedMedia) {
			return false;
		}
		using Key = SharedMediaWithLastSlice::Key;
		auto inSameDomain = [](const Key &a, const Key &b) {
			return (a.type == b.type)
				&& (a.peerId == b.peerId)
				&& (a.migratedPeerId == b.migratedPeerId);
		};
		auto countDistanceInData = [&](const Key &a, const Key &b) {
			return [&](const SharedMediaWithLastSlice &data) {
				return inSameDomain(a, b)
					? data.distance(a, b)
					: std::optional<int>();
			};
		};

		if (key == _sharedMedia->key) {
			return true;
		} else if (!_sharedMediaDataKey
			|| _sharedMedia->key != *_sharedMediaDataKey) {
			return false;
		}
		auto distance = _sharedMediaData
			| countDistanceInData(*key, _sharedMedia->key)
			| func::abs;
		if (distance) {
			return (*distance < kIdsPreloadAfter);
		}
	}
	return (_sharedMedia == nullptr);
}

void OverlayWidget::validateSharedMedia() {
	if (auto key = sharedMediaKey()) {
		_sharedMedia = std::make_unique<SharedMedia>(*key);
		auto viewer = (key->type == SharedMediaType::ChatPhoto)
			? SharedMediaWithLastReversedViewer
			: SharedMediaWithLastViewer;
		viewer(
			*key,
			kIdsLimit,
			kIdsLimit
		) | rpl::start_with_next([this](
				SharedMediaWithLastSlice &&update) {
			handleSharedMediaUpdate(std::move(update));
		}, _sharedMedia->lifetime);
	} else {
		_sharedMedia = nullptr;
		_sharedMediaData = std::nullopt;
		_sharedMediaDataKey = std::nullopt;
	}
}

void OverlayWidget::handleSharedMediaUpdate(SharedMediaWithLastSlice &&update) {
	if ((!_photo && !_doc) || !_sharedMedia) {
		_sharedMediaData = std::nullopt;
		_sharedMediaDataKey = std::nullopt;
	} else {
		_sharedMediaData = std::move(update);
		_sharedMediaDataKey = _sharedMedia->key;
	}
	findCurrent();
	updateControls();
	preloadData(0);
}

std::optional<OverlayWidget::UserPhotosKey> OverlayWidget::userPhotosKey() const {
	if (!_msgid && _user && _photo) {
		return UserPhotosKey {
			_user->bareId(),
			_photo->id
		};
	}
	return std::nullopt;
}

bool OverlayWidget::validUserPhotos() const {
	if (const auto key = userPhotosKey()) {
		if (!_userPhotos) {
			return false;
		}
		const auto countDistanceInData = [](const auto &a, const auto &b) {
			return [&](const UserPhotosSlice &data) {
				return data.distance(a, b);
			};
		};

		const auto distance = (key == _userPhotos->key) ? 0 :
			_userPhotosData
			| countDistanceInData(*key, _userPhotos->key)
			| func::abs;
		if (distance) {
			return (*distance < kIdsPreloadAfter);
		}
	}
	return (_userPhotos == nullptr);
}

void OverlayWidget::validateUserPhotos() {
	if (const auto key = userPhotosKey()) {
		_userPhotos = std::make_unique<UserPhotos>(*key);
		UserPhotosReversedViewer(
			*key,
			kIdsLimit,
			kIdsLimit
		) | rpl::start_with_next([this](
				UserPhotosSlice &&update) {
			handleUserPhotosUpdate(std::move(update));
		}, _userPhotos->lifetime);
	} else {
		_userPhotos = nullptr;
		_userPhotosData = std::nullopt;
	}
}

void OverlayWidget::handleUserPhotosUpdate(UserPhotosSlice &&update) {
	if (!_photo || !_userPhotos) {
		_userPhotosData = std::nullopt;
	} else {
		_userPhotosData = std::move(update);
	}
	findCurrent();
	updateControls();
	preloadData(0);
}

std::optional<OverlayWidget::CollageKey> OverlayWidget::collageKey() const {
	if (const auto item = Auth().data().message(_msgid)) {
		if (const auto media = item->media()) {
			if (const auto page = media->webpage()) {
				for (const auto &item : page->collage.items) {
					if (item == _photo || item == _doc) {
						return item;
					}
				}
			}
		}
	}
	return std::nullopt;
}

bool OverlayWidget::validCollage() const {
	if (const auto key = collageKey()) {
		if (!_collage) {
			return false;
		}
		const auto countDistanceInData = [](const auto &a, const auto &b) {
			return [&](const WebPageCollage &data) {
				const auto i = ranges::find(data.items, a);
				const auto j = ranges::find(data.items, b);
				return (i != end(data.items) && j != end(data.items))
					? std::make_optional(i - j)
					: std::nullopt;
			};
		};

		if (key == _collage->key) {
			return true;
		} else if (_collageData) {
			const auto &items = _collageData->items;
			if (ranges::find(items, *key) != end(items)
				&& ranges::find(items, _collage->key) != end(items)) {
				return true;
			}
		}
	}
	return (_collage == nullptr);
}

void OverlayWidget::validateCollage() {
	if (const auto key = collageKey()) {
		_collage = std::make_unique<Collage>(*key);
		_collageData = WebPageCollage();
		if (const auto item = Auth().data().message(_msgid)) {
			if (const auto media = item->media()) {
				if (const auto page = media->webpage()) {
					_collageData = page->collage;
				}
			}
		}
	} else {
		_collage = nullptr;
		_collageData = std::nullopt;
	}
}

void OverlayWidget::refreshMediaViewer() {
	if (!validSharedMedia()) {
		validateSharedMedia();
	}
	if (!validUserPhotos()) {
		validateUserPhotos();
	}
	if (!validCollage()) {
		validateCollage();
	}
	findCurrent();
	updateControls();
	preloadData(0);
}

void OverlayWidget::refreshFromLabel(HistoryItem *item) {
	if (_msgid && item) {
		_from = item->senderOriginal();
		if (const auto info = item->hiddenForwardedInfo()) {
			_fromName = info->name;
		} else {
			Assert(_from != nullptr);
			_fromName = App::peerName(
				_from->migrateTo() ? _from->migrateTo() : _from);
		}
	} else {
		_from = _user;
		_fromName = _user ? App::peerName(_user) : QString();
	}
}

void OverlayWidget::refreshCaption(HistoryItem *item) {
	_caption = Text();
	if (!item) {
		return;
	} else if (const auto media = item->media()) {
		if (media->webpage()) {
			return;
		}
	}
	const auto caption = item->originalText();
	if (caption.text.isEmpty()) {
		return;
	}
	const auto asBot = [&] {
		if (const auto author = item->author()->asUser()) {
			return author->botInfo != nullptr;
		}
		return false;
	}();
	_caption = Text(st::msgMinWidth);
	_caption.setMarkedText(
		st::mediaviewCaptionStyle,
		caption,
		Ui::ItemTextOptions(item));
}

void OverlayWidget::refreshGroupThumbs() {
	const auto existed = (_groupThumbs != nullptr);
	if (_index && _sharedMediaData) {
		View::GroupThumbs::Refresh(
			_groupThumbs,
			*_sharedMediaData,
			*_index,
			_groupThumbsAvailableWidth);
	} else if (_index && _userPhotosData) {
		View::GroupThumbs::Refresh(
			_groupThumbs,
			*_userPhotosData,
			*_index,
			_groupThumbsAvailableWidth);
	} else if (_index && _collageData) {
		View::GroupThumbs::Refresh(
			_groupThumbs,
			{ _msgid, &*_collageData },
			*_index,
			_groupThumbsAvailableWidth);
	} else if (_groupThumbs) {
		_groupThumbs->clear();
		_groupThumbs->resizeToWidth(_groupThumbsAvailableWidth);
	}
	if (_groupThumbs && !existed) {
		initGroupThumbs();
	}
}

void OverlayWidget::initGroupThumbs() {
	Expects(_groupThumbs != nullptr);

	_groupThumbs->updateRequests(
	) | rpl::start_with_next([this](QRect rect) {
		const auto shift = (width() / 2);
		_groupThumbsRect = QRect(
			shift + rect.x(),
			_groupThumbsTop,
			rect.width(),
			_groupThumbs->height());
		update(_groupThumbsRect);
	}, _groupThumbs->lifetime());

	_groupThumbs->activateRequests(
	) | rpl::start_with_next([this](View::GroupThumbs::Key key) {
		using CollageKey = View::GroupThumbs::CollageKey;
		if (const auto photoId = base::get_if<PhotoId>(&key)) {
			const auto photo = Auth().data().photo(*photoId);
			moveToEntity({ photo, nullptr });
		} else if (const auto itemId = base::get_if<FullMsgId>(&key)) {
			moveToEntity(entityForItemId(*itemId));
		} else if (const auto collageKey = base::get_if<CollageKey>(&key)) {
			if (_collageData) {
				moveToEntity(entityForCollage(collageKey->index));
			}
		}
	}, _groupThumbs->lifetime());

	_groupThumbsRect = QRect(
		_groupThumbsLeft,
		_groupThumbsTop,
		width() - 2 * _groupThumbsLeft,
		height() - _groupThumbsTop);
}

void OverlayWidget::clearControlsState() {
	_saveMsgStarted = 0;
	_loadRequest = 0;
	_over = _down = OverNone;
	_pressed = false;
	_dragging = 0;
	setCursor(style::cur_default);
	if (!_animations.empty()) {
		_animations.clear();
		_stateAnimation.stop();
	}
	if (!_animationOpacities.empty()) {
		_animationOpacities.clear();
	}
}

void OverlayWidget::showPhoto(not_null<PhotoData*> photo, HistoryItem *context) {
	if (context) {
		setContext(context);
	} else {
		setContext(std::nullopt);
	}

	clearControlsState();
	_firstOpenedPeerPhoto = false;
	_photo = photo;

	refreshMediaViewer();

	displayPhoto(photo, context);
	preloadData(0);
	activateControls();
}

void OverlayWidget::showPhoto(not_null<PhotoData*> photo, not_null<PeerData*> context) {
	setContext(context);

	clearControlsState();
	_firstOpenedPeerPhoto = true;
	_photo = photo;

	refreshMediaViewer();

	displayPhoto(photo, nullptr);
	preloadData(0);
	activateControls();
}

void OverlayWidget::showDocument(not_null<DocumentData*> document, HistoryItem *context) {
	if (context) {
		setContext(context);
	} else {
		setContext(std::nullopt);
	}

	clearControlsState();
	_photo = nullptr;

	_streamingStartPaused = false;
	displayDocument(document, context);
	preloadData(0);
	activateControls();
}

void OverlayWidget::displayPhoto(not_null<PhotoData*> photo, HistoryItem *item) {
	if (photo->isNull()) {
		displayDocument(nullptr, item);
		return;
	}
	if (isHidden()) {
		moveToScreen();
	}

	clearStreaming();
	clearLottie();
	destroyThemePreview();
	_doc = nullptr;
	_fullScreenVideo = false;
	_photo = photo;
	_radial.stop();

	refreshMediaViewer();
	refreshCaption(item);

	_zoom = 0;
	_zoomToScreen = 0;
	Auth().downloader().clearPriorities();
	_blurred = true;
	_current = QPixmap();
	_down = OverNone;
	_w = ConvertScale(photo->width());
	_h = ConvertScale(photo->height());
	contentSizeChanged();
	refreshFromLabel(item);
	_photo->download(fileOrigin());
	displayFinished();
}

void OverlayWidget::destroyThemePreview() {
	_themePreviewId = 0;
	_themePreviewShown = false;
	_themePreview.reset();
	_themeApply.destroy();
	_themeCancel.destroy();
}

void OverlayWidget::redisplayContent() {
	if (isHidden()) {
		return;
	}
	const auto item = Auth().data().message(_msgid);
	if (_photo) {
		displayPhoto(_photo, item);
	} else {
		displayDocument(_doc, item);
	}
}

// Empty messages shown as docs: doc can be nullptr.
void OverlayWidget::displayDocument(DocumentData *doc, HistoryItem *item) {
	if (isHidden()) {
		moveToScreen();
	}
	_fullScreenVideo = false;
	_current = QPixmap();
	clearStreaming();
	clearLottie();
	destroyThemePreview();
	_doc = doc;
	_photo = nullptr;
	_radial.stop();

	refreshMediaViewer();
	refreshCaption(item);
	if (_doc) {
		if (_doc->sticker()) {
			if (const auto image = _doc->getStickerLarge()) {
				_current = image->pix(fileOrigin());
			} else if (_doc->hasThumbnail()) {
				_current = _doc->thumbnail()->pixBlurred(
					fileOrigin(),
					_doc->dimensions.width(),
					_doc->dimensions.height());
			}
		} else {
			_doc->automaticLoad(fileOrigin(), item);

			if (_doc->canBePlayed() && !_doc->loading()) {
				initStreaming();
			} else if (_doc->isVideoFile()) {
				initStreamingThumbnail();
			} else if (_doc->isTheme()) {
				initThemePreview();
			} else {
				auto &location = _doc->location(true);
				if (location.accessEnable()) {
					const auto &path = location.name();
					if (QImageReader(path).canRead()) {
						_current = PrepareStaticImage(path);
					//} else if (auto lottie = Lottie::FromFile(path)) {
					//	_lottie = std::make_unique<LottieFile>(
					//		std::move(lottie));
					//	_lottie->data->updates(
					//	) | rpl::start_with_next([=] {
					//		update();
					//	}, lifetime());
					}
				}
				location.accessDisable();
			}
		}
	}

	_docIconRect = QRect((width() - st::mediaviewFileIconSize) / 2, (height() - st::mediaviewFileIconSize) / 2, st::mediaviewFileIconSize, st::mediaviewFileIconSize);
	if (documentBubbleShown()) {
		if (!_doc || !_doc->hasThumbnail()) {
			int32 colorIndex = documentColorIndex(_doc, _docExt);
			_docIconColor = documentColor(colorIndex);
			const style::icon *(thumbs[]) = { &st::mediaviewFileBlue, &st::mediaviewFileGreen, &st::mediaviewFileRed, &st::mediaviewFileYellow };
			_docIcon = thumbs[colorIndex];

			int32 extmaxw = (st::mediaviewFileIconSize - st::mediaviewFileExtPadding * 2);
			_docExtWidth = st::mediaviewFileExtFont->width(_docExt);
			if (_docExtWidth > extmaxw) {
				_docExt = st::mediaviewFileExtFont->elided(_docExt, extmaxw, Qt::ElideMiddle);
				_docExtWidth = st::mediaviewFileExtFont->width(_docExt);
			}
		} else {
			_doc->loadThumbnail(fileOrigin());
			int32 tw = _doc->thumbnail()->width(), th = _doc->thumbnail()->height();
			if (!tw || !th) {
				_docThumbx = _docThumby = _docThumbw = 0;
			} else if (tw > th) {
				_docThumbw = (tw * st::mediaviewFileIconSize) / th;
				_docThumbx = (_docThumbw - st::mediaviewFileIconSize) / 2;
				_docThumby = 0;
			} else {
				_docThumbw = st::mediaviewFileIconSize;
				_docThumbx = 0;
				_docThumby = ((th * _docThumbw) / tw - st::mediaviewFileIconSize) / 2;
			}
		}

		int32 maxw = st::mediaviewFileSize.width() - st::mediaviewFileIconSize - st::mediaviewFilePadding * 3;

		if (_doc) {
			_docName = (_doc->type == StickerDocument)
				? lang(lng_in_dlg_sticker)
				: (_doc->type == AnimatedDocument
					? qsl("GIF")
					: (_doc->filename().isEmpty()
						? lang(lng_mediaview_doc_image)
						: _doc->filename()));
		} else {
			_docName = lang(lng_message_empty);
		}
		_docNameWidth = st::mediaviewFileNameFont->width(_docName);
		if (_docNameWidth > maxw) {
			_docName = st::mediaviewFileNameFont->elided(_docName, maxw, Qt::ElideMiddle);
			_docNameWidth = st::mediaviewFileNameFont->width(_docName);
		}

		// _docSize is updated in updateControls()

		_docRect = QRect((width() - st::mediaviewFileSize.width()) / 2, (height() - st::mediaviewFileSize.height()) / 2, st::mediaviewFileSize.width(), st::mediaviewFileSize.height());
		_docIconRect = myrtlrect(_docRect.x() + st::mediaviewFilePadding, _docRect.y() + st::mediaviewFilePadding, st::mediaviewFileIconSize, st::mediaviewFileIconSize);
	} else if (_themePreviewShown) {
		updateThemePreviewGeometry();
	} else if (!_current.isNull()) {
		_current.setDevicePixelRatio(cRetinaFactor());
		_w = ConvertScale(_current.width());
		_h = ConvertScale(_current.height());
	} else if (videoShown()) {
		const auto contentSize = ConvertScale(videoSize());
		_w = contentSize.width();
		_h = contentSize.height();
	}
	contentSizeChanged();
	refreshFromLabel(item);
	_blurred = false;
	displayFinished();
}

void OverlayWidget::updateThemePreviewGeometry() {
	if (_themePreviewShown) {
		auto previewRect = QRect((width() - st::themePreviewSize.width()) / 2, (height() - st::themePreviewSize.height()) / 2, st::themePreviewSize.width(), st::themePreviewSize.height());
		_themePreviewRect = previewRect.marginsAdded(st::themePreviewMargin);
		if (_themeApply) {
			auto right = qMax(width() - _themePreviewRect.x() - _themePreviewRect.width(), 0) + st::themePreviewMargin.right();
			auto bottom = qMin(height(), _themePreviewRect.y() + _themePreviewRect.height());
			_themeApply->moveToRight(right, bottom - st::themePreviewMargin.bottom() + (st::themePreviewMargin.bottom() - _themeApply->height()) / 2);
			right += _themeApply->width() + st::themePreviewButtonsSkip;
			_themeCancel->moveToRight(right, _themeApply->y());
		}

		// For context menu event.
		_x = _themePreviewRect.x();
		_y = _themePreviewRect.y();
		_w = _themePreviewRect.width();
		_h = _themePreviewRect.height();
	}
}

void OverlayWidget::displayFinished() {
	updateControls();
	if (isHidden()) {
		psUpdateOverlayed(this);
#ifdef Q_OS_LINUX
		showFullScreen();
#else // Q_OS_LINUX
		show();
#endif // Q_OS_LINUX
		psShowOverAll(this);
		activateWindow();
		QApplication::setActiveWindow(this);
		setFocus();
	}
}

void OverlayWidget::initStreaming() {
	Expects(_doc != nullptr);
	Expects(_doc->canBePlayed());

	if (_streamed) {
		return;
	}
	initStreamingThumbnail();
	createStreamingObjects();

	Core::App().updateNonIdle();
	_streamed->player.updates(
	) | rpl::start_with_next_error([=](Streaming::Update &&update) {
		handleStreamingUpdate(std::move(update));
	}, [=](Streaming::Error &&error) {
		handleStreamingError(std::move(error));
	}, _streamed->player.lifetime());

	restartAtSeekPosition(0);
}

void OverlayWidget::initStreamingThumbnail() {
	Expects(_doc != nullptr);

	const auto good = _doc->goodThumbnail();
	const auto useGood = (good && good->loaded());
	const auto thumb = _doc->thumbnail();
	const auto useThumb = (thumb && thumb->loaded());
	const auto blurred = _doc->thumbnailInline();
	if (good && !useGood) {
		good->load({});
	} else if (thumb && !useThumb) {
		thumb->load(fileOrigin());
	}
	const auto size = useGood ? good->size() : _doc->dimensions;
	if (!useGood && !thumb && !blurred) {
		return;
	} else if (size.isEmpty()) {
		return;
	}
	const auto w = size.width();
	const auto h = size.height();
	const auto options = VideoThumbOptions(_doc);
	const auto goodOptions = (options & ~Images::Option::Blurred);
	_current = (useGood
		? good
		: useThumb
		? thumb
		: blurred
		? blurred
		: Image::BlankMedia().get())->pixNoCache(
			fileOrigin(),
			w,
			h,
			useGood ? goodOptions : options,
			w / cIntRetinaFactor(),
			h / cIntRetinaFactor());
	_current.setDevicePixelRatio(cRetinaFactor());
}

void OverlayWidget::streamingReady(Streaming::Information &&info) {
	_streamed->info = std::move(info);
	validateStreamedGoodThumbnail();
	if (videoShown()) {
		const auto contentSize = ConvertScale(videoSize());
		if (contentSize != QSize(_width, _height)) {
			update(contentRect());
			_w = contentSize.width();
			_h = contentSize.height();
			contentSizeChanged();
		}
	}
	this->update(contentRect());
	playbackWaitingChange(false);
}

void OverlayWidget::createStreamingObjects() {
	_streamed = std::make_unique<Streamed>(
		&_doc->owner(),
		_doc->createStreamingLoader(fileOrigin()),
		this,
		static_cast<PlaybackControls::Delegate*>(this),
		[=] { waitingAnimationCallback(); });
	_streamed->withSound = _doc->isAudioFile()
		|| _doc->isVideoFile()
		|| _doc->isVoiceMessage()
		|| _doc->isVideoMessage();

	if (videoIsGifv()) {
		_streamed->controls.hide();
	} else {
		refreshClipControllerGeometry();
		_streamed->controls.show();
	}
}

QImage OverlayWidget::transformVideoFrame(QImage frame) const {
	Expects(videoShown());

	if (_streamed->info.video.rotation != 0) {
		auto transform = QTransform();
		transform.rotate(_streamed->info.video.rotation);
		frame = frame.transformed(transform);
	}
	if (frame.size() != _streamed->info.video.size) {
		frame = frame.scaled(
			_streamed->info.video.size,
			Qt::IgnoreAspectRatio,
			Qt::SmoothTransformation);
	}
	return frame;
}

void OverlayWidget::validateStreamedGoodThumbnail() {
	Expects(_streamed != nullptr);
	Expects(_doc != nullptr);

	const auto good = _doc->goodThumbnail();
	if (!videoShown() || (good && good->loaded()) || _doc->uploading()) {
		return;
	}
	auto image = transformVideoFrame(_streamed->info.video.cover);
	auto bytes = QByteArray();
	{
		auto buffer = QBuffer(&bytes);
		image.save(&buffer, "JPG", kGoodThumbnailQuality);
	}
	const auto length = bytes.size();
	if (!length || length > Storage::kMaxFileInMemory) {
		LOG(("App Error: Bad thumbnail data for saving to cache."));
	} else if (_doc->uploading()) {
		_doc->setGoodThumbnailOnUpload(
			std::move(image),
			std::move(bytes));
	} else {
		_doc->owner().cache().putIfEmpty(
			_doc->goodThumbnailCacheKey(),
			Storage::Cache::Database::TaggedValue(
				std::move(bytes),
				Data::kImageCacheTag));
		_doc->refreshGoodThumbnail();
	}
}

void OverlayWidget::handleStreamingUpdate(Streaming::Update &&update) {
	using namespace Streaming;

	update.data.match([&](Information &update) {
		streamingReady(std::move(update));
	}, [&](const PreloadedVideo &update) {
		_streamed->info.video.state.receivedTill = update.till;
		updatePlaybackState();
	}, [&](const UpdateVideo &update) {
		_streamed->info.video.state.position = update.position;
		this->update(contentRect());
		Core::App().updateNonIdle();
		updatePlaybackState();
	}, [&](const PreloadedAudio &update) {
		_streamed->info.audio.state.receivedTill = update.till;
		updatePlaybackState();
	}, [&](const UpdateAudio &update) {
		_streamed->info.audio.state.position = update.position;
		updatePlaybackState();
	}, [&](const WaitingForData &update) {
		playbackWaitingChange(update.waiting);
	}, [&](MutedByOther) {
	}, [&](Finished) {
		const auto finishTrack = [](Streaming::TrackState &state) {
			state.position = state.receivedTill = state.duration;
		};
		finishTrack(_streamed->info.audio.state);
		finishTrack(_streamed->info.video.state);
		updatePlaybackState();
	});
}

void OverlayWidget::handleStreamingError(Streaming::Error &&error) {
	if (error == Streaming::Error::NotStreamable) {
		_doc->setNotSupportsStreaming();
	} else if (error == Streaming::Error::OpenFailed) {
		_doc->setInappPlaybackFailed();
	}
	if (!_doc->canBePlayed()) {
		redisplayContent();
	} else {
		playbackWaitingChange(false);
		updatePlaybackState();
	}
}

void OverlayWidget::playbackWaitingChange(bool waiting) {
	Expects(_streamed != nullptr);

	if (_streamed->waiting == waiting) {
		return;
	}
	_streamed->waiting = waiting;
	const auto fade = [=](crl::time duration) {
		if (!_streamed->radial.animating()) {
			_streamed->radial.start(
				st::defaultInfiniteRadialAnimation.sineDuration);
		}
		_streamed->fading.start(
			[=] { update(radialRect()); },
			_streamed->waiting ? 0. : 1.,
			_streamed->waiting ? 1. : 0.,
			duration);
	};
	if (waiting) {
		if (_streamed->radial.animating()) {
			_streamed->timer.cancel();
			fade(kWaitingFastDuration);
		} else {
			_streamed->timer.callOnce(kWaitingShowDelay);
			_streamed->timer.setCallback([=] {
				fade(kWaitingShowDuration);
			});
		}
	} else {
		_streamed->timer.cancel();
		if (_streamed->radial.animating()) {
			fade(kWaitingFastDuration);
		}
	}
}

void OverlayWidget::initThemePreview() {
	Assert(_doc && _doc->isTheme());

	auto &location = _doc->location();
	if (location.isEmpty() || !location.accessEnable()) {
		return;
	}
	_themePreviewShown = true;

	Window::Theme::CurrentData current;
	current.backgroundId = Window::Theme::Background()->id();
	current.backgroundImage = Window::Theme::Background()->createCurrentImage();
	current.backgroundTiled = Window::Theme::Background()->tile();

	const auto path = _doc->location().name();
	const auto id = _themePreviewId = rand_value<uint64>();
	const auto weak = make_weak(this);
	crl::async([=, data = std::move(current)]() mutable {
		auto preview = Window::Theme::GeneratePreview(
			path,
			std::move(data));
		crl::on_main(weak, [=, result = std::move(preview)]() mutable {
			if (id != _themePreviewId) {
				return;
			}
			_themePreviewId = 0;
			_themePreview = std::move(result);
			if (_themePreview) {
				_themeApply.create(
					this,
					langFactory(lng_theme_preview_apply),
					st::themePreviewApplyButton);
				_themeApply->show();
				_themeApply->setClickedCallback([this] {
					auto preview = std::move(_themePreview);
					close();
					Window::Theme::Apply(std::move(preview));
				});
				_themeCancel.create(
					this,
					langFactory(lng_cancel),
					st::themePreviewCancelButton);
				_themeCancel->show();
				_themeCancel->setClickedCallback([this] { close(); });
				updateControls();
			}
			update();
		});
	});
	location.accessDisable();
}

void OverlayWidget::refreshClipControllerGeometry() {
	if (!_streamed || videoIsGifv()) {
		return;
	}

	if (_groupThumbs && _groupThumbs->hiding()) {
		_groupThumbs = nullptr;
		_groupThumbsRect = QRect();
	}
	const auto controllerBottom = _groupThumbs
		? _groupThumbsTop
		: height();
	_streamed->controls.resize(st::mediaviewControllerSize);
	_streamed->controls.move(
		(width() - _streamed->controls.width()) / 2,
		controllerBottom - _streamed->controls.height() - st::mediaviewCaptionPadding.bottom() - st::mediaviewCaptionMargin.height());
	Ui::SendPendingMoveResizeEvents(&_streamed->controls);
}

void OverlayWidget::playbackControlsPlay() {
	playbackPauseResume();
}

void OverlayWidget::playbackControlsPause() {
	playbackPauseResume();
}

void OverlayWidget::playbackControlsToFullScreen() {
	playbackToggleFullScreen();
}

void OverlayWidget::playbackControlsFromFullScreen() {
	playbackToggleFullScreen();
}

void OverlayWidget::playbackPauseResume() {
	Expects(_streamed != nullptr);

	_streamed->resumeOnCallEnd = false;
	if (const auto item = Auth().data().message(_msgid)) {
		if (_streamed->player.failed()) {
			clearStreaming();
			initStreaming();
		} else if (_streamed->player.finished()) {
			_streamingStartPaused = false;
			restartAtSeekPosition(0);
		} else if (_streamed->player.paused()) {
			_streamed->player.resume();
			updatePlaybackState();
			playbackPauseMusic();
		} else {
			_streamed->player.pause();
			updatePlaybackState();
		}
	} else {
		clearStreaming();
		updateControls();
		update();
	}
}

void OverlayWidget::restartAtSeekPosition(crl::time position) {
	Expects(_streamed != nullptr);
	Expects(_doc != nullptr);

	if (videoShown()) {
		_streamed->info.video.cover = videoFrame();
		_current = Images::PixmapFast(transformVideoFrame(videoFrame()));
		update(contentRect());
	}
	auto options = Streaming::PlaybackOptions();
	options.position = position;
	options.audioId = AudioMsgId(_doc, _msgid);
	if (!_streamed->withSound) {
		options.mode = Streaming::Mode::Video;
		options.loop = true;
	}
	_streamed->player.play(options);
	if (_streamingStartPaused) {
		_streamed->player.pause();
	} else {
		playbackPauseMusic();
	}
	_streamed->pausedBySeek = false;

	_streamed->info.audio.state.position
		= _streamed->info.video.state.position
		= position;
	updatePlaybackState();
	playbackWaitingChange(true);
}

void OverlayWidget::playbackControlsSeekProgress(crl::time position) {
	Expects(_streamed != nullptr);

	if (!_streamed->player.paused() && !_streamed->player.finished()) {
		_streamed->pausedBySeek = true;
		playbackControlsPause();
	}
}

void OverlayWidget::playbackControlsSeekFinished(crl::time position) {
	Expects(_streamed != nullptr);

	_streamingStartPaused = !_streamed->pausedBySeek
		&& !_streamed->player.finished();
	restartAtSeekPosition(position);
}

void OverlayWidget::playbackControlsVolumeChanged(float64 volume) {
	Global::SetVideoVolume(volume);
	updateMixerVideoVolume();
	Global::RefVideoVolumeChanged().notify();
	Auth().saveSettingsDelayed();
}

float64 OverlayWidget::playbackControlsCurrentVolume() {
	return Global::VideoVolume();
}

void OverlayWidget::playbackToggleFullScreen() {
	Expects(_streamed != nullptr);

	if (!videoShown() || (videoIsGifv() && !_fullScreenVideo)) {
		return;
	}
	_fullScreenVideo = !_fullScreenVideo;
	if (_fullScreenVideo) {
		_fullScreenZoomCache = _zoom;
		setZoomLevel(ZoomToScreenLevel);
	} else {
		setZoomLevel(_fullScreenZoomCache);
		_streamed->controls.showAnimated();
	}

	_streamed->controls.setInFullScreen(_fullScreenVideo);
	updateControls();
	update();
}

void OverlayWidget::playbackPauseOnCall() {
	Expects(_streamed != nullptr);

	if (_streamed->player.finished() || _streamed->player.paused()) {
		return;
	}
	_streamed->resumeOnCallEnd = true;
	_streamed->player.pause();
	updatePlaybackState();
}

void OverlayWidget::playbackResumeOnCall() {
	Expects(_streamed != nullptr);

	if (_streamed->resumeOnCallEnd) {
		_streamed->resumeOnCallEnd = false;
		_streamed->player.resume();
		updatePlaybackState();
		playbackPauseMusic();
	}
}

void OverlayWidget::playbackPauseMusic() {
	Expects(_streamed != nullptr);

	if (!_streamed->withSound) {
		return;
	}
	Player::instance()->pause(AudioMsgId::Type::Voice);
	Player::instance()->pause(AudioMsgId::Type::Song);
}

void OverlayWidget::updatePlaybackState() {
	Expects(_streamed != nullptr);

	if (videoIsGifv()) {
		return;
	}
	const auto state = _streamed->player.prepareLegacyState();
	if (state.position != kTimeUnknown && state.length != kTimeUnknown) {
		_streamed->controls.updatePlayback(state);
	}
}

void OverlayWidget::validatePhotoImage(Image *image, bool blurred) {
	if (!image || !image->loaded()) {
		if (!blurred) {
			image->load(fileOrigin());
		}
		return;
	} else if (!_current.isNull() && (blurred || !_blurred)) {
		return;
	}
	const auto w = _width * cIntRetinaFactor();
	const auto h = _height * cIntRetinaFactor();
	_current = image->pixNoCache(
		fileOrigin(),
		w,
		h,
		Images::Option::Smooth
		| (blurred ? Images::Option::Blurred : Images::Option(0)));
	_current.setDevicePixelRatio(cRetinaFactor());
	_blurred = blurred;
}

void OverlayWidget::validatePhotoCurrentImage() {
	validatePhotoImage(_photo->large(), false);
	validatePhotoImage(_photo->thumbnail(), true);
	validatePhotoImage(_photo->thumbnailSmall(), true);
	validatePhotoImage(_photo->thumbnailInline(), true);
	if (_current.isNull()) {
		_photo->loadThumbnailSmall(fileOrigin());
	}
}

void OverlayWidget::checkLoadingWhileStreaming() {
	if (_streamed && _doc->loading()) {
		crl::on_main(this, [=, doc = _doc] {
			if (!isHidden() && _doc == doc) {
				redisplayContent();
			}
		});
	}
}

void OverlayWidget::paintEvent(QPaintEvent *e) {
	checkLoadingWhileStreaming();

	const auto r = e->rect();
	const auto &region = e->region();
	const auto rects = region.rects();

	const auto contentShown = _photo || documentContentShown();
	const auto bgRects = contentShown
		? (region - contentRect()).rects()
		: rects;

	auto ms = crl::now();

	Painter p(this);

	bool name = false;

	p.setClipRegion(region);

	// main bg
	const auto m = p.compositionMode();
	p.setCompositionMode(QPainter::CompositionMode_Source);
	const auto bgColor = _fullScreenVideo ? st::mediaviewVideoBg : st::mediaviewBg;
	for (const auto &rect : bgRects) {
		p.fillRect(rect, bgColor);
	}
	p.setCompositionMode(m);

	// photo
	if (_photo) {
		validatePhotoCurrentImage();
	}
	p.setOpacity(1);
	if (contentShown) {
		const auto rect = contentRect();
		if (rect.intersects(r)) {
			if (videoShown()) {
				paintTransformedVideoFrame(p);
			} else {
				if ((!_doc || !_doc->getStickerLarge())
					&& (_current.isNull() || _current.hasAlpha())) {
					p.fillRect(rect, _transparentBrush);
				}
				if (!_current.isNull()) {
					PainterHighQualityEnabler hq(p);
					p.drawPixmap(rect, _current);
				}
			}

			const auto radial = _radial.animating();
			const auto radialOpacity = radial ? _radial.opacity() : 0.;
			paintRadialLoading(p, radial, radialOpacity);
		}
		if (_saveMsgStarted && _saveMsg.intersects(r)) {
			float64 dt = float64(ms) - _saveMsgStarted, hidingDt = dt - st::mediaviewSaveMsgShowing - st::mediaviewSaveMsgShown;
			if (dt < st::mediaviewSaveMsgShowing + st::mediaviewSaveMsgShown + st::mediaviewSaveMsgHiding) {
				if (hidingDt >= 0 && _saveMsgOpacity.to() > 0.5) {
					_saveMsgOpacity.start(0);
				}
				float64 progress = (hidingDt >= 0) ? (hidingDt / st::mediaviewSaveMsgHiding) : (dt / st::mediaviewSaveMsgShowing);
				_saveMsgOpacity.update(qMin(progress, 1.), anim::linear);
                if (_saveMsgOpacity.current() > 0) {
					p.setOpacity(_saveMsgOpacity.current());
					App::roundRect(p, _saveMsg, st::mediaviewSaveMsgBg, MediaviewSaveCorners);
					st::mediaviewSaveMsgCheck.paint(p, _saveMsg.topLeft() + st::mediaviewSaveMsgCheckPos, width());

					p.setPen(st::mediaviewSaveMsgFg);
					p.setTextPalette(st::mediaviewTextPalette);
					_saveMsgText.draw(p, _saveMsg.x() + st::mediaviewSaveMsgPadding.left(), _saveMsg.y() + st::mediaviewSaveMsgPadding.top(), _saveMsg.width() - st::mediaviewSaveMsgPadding.left() - st::mediaviewSaveMsgPadding.right());
					p.restoreTextPalette();
					p.setOpacity(1);
				}
				if (!_blurred) {
                    auto nextFrame = (dt < st::mediaviewSaveMsgShowing || hidingDt >= 0) ? int(AnimationTimerDelta) : (st::mediaviewSaveMsgShowing + st::mediaviewSaveMsgShown + 1 - dt);
					_saveMsgUpdater.start(nextFrame);
				}
			} else {
				_saveMsgStarted = 0;
			}
		}
	} else if (_themePreviewShown) {
		paintThemePreview(p, r);
	} else if (_lottie) {
		paintLottieFrame(p, r);
	} else if (documentBubbleShown()) {
		if (_docRect.intersects(r)) {
			p.fillRect(_docRect, st::mediaviewFileBg);
			if (_docIconRect.intersects(r)) {
				const auto radial = _radial.animating();
				const auto radialOpacity = radial ? _radial.opacity() : 0.;
				if (!_doc || !_doc->hasThumbnail()) {
					p.fillRect(_docIconRect, _docIconColor);
					if ((!_doc || _doc->loaded()) && (!radial || radialOpacity < 1) && _docIcon) {
						_docIcon->paint(p, _docIconRect.x() + (_docIconRect.width() - _docIcon->width()), _docIconRect.y(), width());
						p.setPen(st::mediaviewFileExtFg);
						p.setFont(st::mediaviewFileExtFont);
						if (!_docExt.isEmpty()) {
							p.drawText(_docIconRect.x() + (_docIconRect.width() - _docExtWidth) / 2, _docIconRect.y() + st::mediaviewFileExtTop + st::mediaviewFileExtFont->ascent, _docExt);
						}
					}
				} else {
					int32 rf(cIntRetinaFactor());
					p.drawPixmap(_docIconRect.topLeft(), _doc->thumbnail()->pix(fileOrigin(), _docThumbw), QRect(_docThumbx * rf, _docThumby * rf, st::mediaviewFileIconSize * rf, st::mediaviewFileIconSize * rf));
				}

				paintRadialLoading(p, radial, radialOpacity);
			}

			if (!_docIconRect.contains(r)) {
				name = true;
				p.setPen(st::mediaviewFileNameFg);
				p.setFont(st::mediaviewFileNameFont);
				p.drawTextLeft(_docRect.x() + 2 * st::mediaviewFilePadding + st::mediaviewFileIconSize, _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileNameTop, width(), _docName, _docNameWidth);

				p.setPen(st::mediaviewFileSizeFg);
				p.setFont(st::mediaviewFont);
				p.drawTextLeft(_docRect.x() + 2 * st::mediaviewFilePadding + st::mediaviewFileIconSize, _docRect.y() + st::mediaviewFilePadding + st::mediaviewFileSizeTop, width(), _docSize, _docSizeWidth);
			}
		}
	}

	float64 co = _fullScreenVideo ? 0. : _controlsOpacity.current();
	if (co > 0) {
		// left nav bar
		if (_leftNav.intersects(r) && _leftNavVisible) {
			auto o = overLevel(OverLeftNav);
			if (o > 0) {
				p.setOpacity(o * co);
				for (const auto &rect : rects) {
					const auto fill = _leftNav.intersected(rect);
					if (!fill.isEmpty()) p.fillRect(fill, st::mediaviewControlBg);
				}
			}
			if (_leftNavIcon.intersects(r)) {
				p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
				st::mediaviewLeft.paintInCenter(p, _leftNavIcon);
			}
		}

		// right nav bar
		if (_rightNav.intersects(r) && _rightNavVisible) {
			auto o = overLevel(OverRightNav);
			if (o > 0) {
				p.setOpacity(o * co);
				for (const auto &rect : rects) {
					const auto fill = _rightNav.intersected(rect);
					if (!fill.isEmpty()) p.fillRect(fill, st::mediaviewControlBg);
				}
			}
			if (_rightNavIcon.intersects(r)) {
				p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
				st::mediaviewRight.paintInCenter(p, _rightNavIcon);
			}
		}

		// close button
		if (_closeNav.intersects(r)) {
			auto o = overLevel(OverClose);
			if (o > 0) {
				p.setOpacity(o * co);
				for (const auto &rect : rects) {
					const auto fill = _closeNav.intersected(rect);
					if (!fill.isEmpty()) p.fillRect(fill, st::mediaviewControlBg);
				}
			}
			if (_closeNavIcon.intersects(r)) {
				p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
				st::mediaviewClose.paintInCenter(p, _closeNavIcon);
			}
		}

		// save button
		if (_saveVisible && _saveNavIcon.intersects(r)) {
			auto o = overLevel(OverSave);
			p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
			st::mediaviewSave.paintInCenter(p, _saveNavIcon);
		}

		// more area
		if (_moreNavIcon.intersects(r)) {
			auto o = overLevel(OverMore);
			p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
			st::mediaviewMore.paintInCenter(p, _moreNavIcon);
		}

		p.setPen(st::mediaviewControlFg);
		p.setFont(st::mediaviewThickFont);

		// header
		if (_headerNav.intersects(r)) {
			auto o = _headerHasLink ? overLevel(OverHeader) : 0;
			p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
			p.drawText(_headerNav.left(), _headerNav.top() + st::mediaviewThickFont->ascent, _headerText);

			if (o > 0) {
				p.setOpacity(o * co);
				p.drawLine(_headerNav.left(), _headerNav.top() + st::mediaviewThickFont->ascent + 1, _headerNav.right(), _headerNav.top() + st::mediaviewThickFont->ascent + 1);
			}
		}

		p.setFont(st::mediaviewFont);

		// name
		if (_nameNav.isValid() && _nameNav.intersects(r)) {
			float64 o = _from ? overLevel(OverName) : 0.;
			p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
			_fromNameLabel.drawElided(p, _nameNav.left(), _nameNav.top(), _nameNav.width());

			if (o > 0) {
				p.setOpacity(o * co);
				p.drawLine(_nameNav.left(), _nameNav.top() + st::mediaviewFont->ascent + 1, _nameNav.right(), _nameNav.top() + st::mediaviewFont->ascent + 1);
			}
		}

		// date
		if (_dateNav.intersects(r)) {
			float64 o = overLevel(OverDate);
			p.setOpacity((o * st::mediaviewIconOverOpacity + (1 - o) * st::mediaviewIconOpacity) * co);
			p.drawText(_dateNav.left(), _dateNav.top() + st::mediaviewFont->ascent, _dateText);

			if (o > 0) {
				p.setOpacity(o * co);
				p.drawLine(_dateNav.left(), _dateNav.top() + st::mediaviewFont->ascent + 1, _dateNav.right(), _dateNav.top() + st::mediaviewFont->ascent + 1);
			}
		}

		// caption
		if (!_caption.isEmpty()) {
			QRect outer(_captionRect.marginsAdded(st::mediaviewCaptionPadding));
			if (outer.intersects(r)) {
				p.setOpacity(co);
				p.setBrush(st::mediaviewCaptionBg);
				p.setPen(Qt::NoPen);
				p.drawRoundedRect(outer, st::mediaviewCaptionRadius, st::mediaviewCaptionRadius);
				if (_captionRect.intersects(r)) {
					p.setTextPalette(st::mediaviewTextPalette);
					p.setPen(st::mediaviewCaptionFg);
					_caption.drawElided(p, _captionRect.x(), _captionRect.y(), _captionRect.width(), _captionRect.height() / st::mediaviewCaptionStyle.font->height);
					p.restoreTextPalette();
				}
			}
		}

		if (_groupThumbs && _groupThumbsRect.intersects(r)) {
			p.setOpacity(co);
			_groupThumbs->paint(
				p,
				_groupThumbsLeft,
				_groupThumbsTop,
				width());
			if (_groupThumbs->hidden()) {
				_groupThumbs = nullptr;
				_groupThumbsRect = QRect();
			}
		}
	}
	checkGroupThumbsAnimation();
}

void OverlayWidget::checkGroupThumbsAnimation() {
	if (_groupThumbs && (!_streamed || _streamed->player.ready())) {
		_groupThumbs->checkForAnimationStart();
	}
}

void OverlayWidget::paintTransformedVideoFrame(Painter &p) {
	const auto rect = contentRect();
	const auto image = videoFrameForDirectPaint();
	//if (_fullScreenVideo) {
	//	const auto fill = rect.intersected(this->rect());
	//	PaintImageProfile(p, image, rect, fill);
	//} else {
	const auto rotation = _streamed->info.video.rotation;
	const auto rotated = [](QRect rect, int rotation) {
		switch (rotation) {
		case 0: return rect;
		case 90: return QRect(
			rect.y(),
			-rect.x() - rect.width(),
			rect.height(),
			rect.width());
		case 180: return QRect(
			-rect.x() - rect.width(),
			-rect.y() - rect.height(),
			rect.width(),
			rect.height());
		case 270: return QRect(
			-rect.y() - rect.height(),
			rect.x(),
			rect.height(),
			rect.width());
		}
		Unexpected("Rotation in OverlayWidget::paintTransformedVideoFrame");
	};

	PainterHighQualityEnabler hq(p);
	if (rotation) {
		p.save();
		p.rotate(rotation);
	}
	p.drawImage(rotated(rect, rotation), image);
	if (rotation) {
		p.restore();
	}
	//}
}

void OverlayWidget::paintRadialLoading(
		Painter &p,
		bool radial,
		float64 radialOpacity) {
	if (_streamed) {
		if (!_streamed->radial.animating()) {
			return;
		}
		if (!_streamed->fading.animating() && !_streamed->waiting) {
			if (!_streamed->waiting) {
				_streamed->radial.stop(anim::type::instant);
			}
			return;
		}
	} else if (!radial && (!_doc || _doc->loaded())) {
		return;
	}

	const auto inner = radialRect();
	Assert(!inner.isEmpty());

#ifdef USE_OPENGL_OVERLAY_WIDGET
	{
		if (_radialCache.size() != inner.size() * cIntRetinaFactor()) {
			_radialCache = QImage(
				inner.size() * cIntRetinaFactor(),
				QImage::Format_ARGB32_Premultiplied);
			_radialCache.setDevicePixelRatio(cRetinaFactor());
		}
		_radialCache.fill(Qt::transparent);

		Painter q(&_radialCache);
		const auto moved = inner.translated(-inner.topLeft());
		paintRadialLoadingContent(q, moved, radial, radialOpacity);
	}
	p.drawImage(inner.topLeft(), _radialCache);
#else // USE_OPENGL_OVERLAY_WIDGET
	paintRadialLoadingContent(p, inner, radial, radialOpacity);
#endif // USE_OPENGL_OVERLAY_WIDGET
}

void OverlayWidget::paintRadialLoadingContent(
		Painter &p,
		QRect inner,
		bool radial,
		float64 radialOpacity) const {
	const auto arc = inner.marginsRemoved(QMargins(
		st::radialLine,
		st::radialLine,
		st::radialLine,
		st::radialLine));
	const auto paintBg = [&](float64 opacity, QBrush brush) {
		p.setOpacity(opacity);
		p.setPen(Qt::NoPen);
		p.setBrush(brush);
		{
			PainterHighQualityEnabler hq(p);
			p.drawEllipse(inner);
		}
		p.setOpacity(1.);
	};

	if (_streamed) {
		paintBg(
			_streamed->fading.value(_streamed->waiting ? 1. : 0.),
			st::radialBg);
		_streamed->radial.draw(p, arc.topLeft(), arc.size(), width());
		return;
	}
	if (_photo) {
		paintBg(radialOpacity, st::radialBg);
	} else {
		const auto o = overLevel(OverIcon);
		paintBg(
			_doc->loaded() ? radialOpacity : 1.,
			anim::brush(st::msgDateImgBg, st::msgDateImgBgOver, o));

		const auto icon = [&]() -> const style::icon * {
			if (radial || _doc->loading()) {
				return &st::historyFileThumbCancel;
			}
			return &st::historyFileThumbDownload;
		}();
		if (icon) {
			icon->paintInCenter(p, inner);
		}
	}
	if (radial) {
		p.setOpacity(1);
		_radial.draw(p, arc, st::radialLine, st::radialFg);
	}
}

void OverlayWidget::paintThemePreview(Painter &p, QRect clip) {
	auto fill = _themePreviewRect.intersected(clip);
	if (!fill.isEmpty()) {
		if (_themePreview) {
			p.drawImage(
				myrtlrect(_themePreviewRect).topLeft(),
				_themePreview->preview);
		} else {
			p.fillRect(fill, st::themePreviewBg);
			p.setFont(st::themePreviewLoadingFont);
			p.setPen(st::themePreviewLoadingFg);
			p.drawText(
				_themePreviewRect,
				lang(_themePreviewId
					? lng_theme_preview_generating
					: lng_theme_preview_invalid),
				QTextOption(style::al_center));
		}
	}

	auto fillOverlay = [&](QRect fill) {
		auto clipped = fill.intersected(clip);
		if (!clipped.isEmpty()) {
			p.setOpacity(st::themePreviewOverlayOpacity);
			p.fillRect(clipped, st::themePreviewBg);
			p.setOpacity(1.);
		}
	};
	auto titleRect = QRect(_themePreviewRect.x(), _themePreviewRect.y(), _themePreviewRect.width(), st::themePreviewMargin.top());
	if (titleRect.x() < 0) {
		titleRect = QRect(0, _themePreviewRect.y(), width(), st::themePreviewMargin.top());
	}
	if (auto fillTitleRect = (titleRect.y() < 0)) {
		titleRect.moveTop(0);
		fillOverlay(titleRect);
	}
	titleRect = titleRect.marginsRemoved(QMargins(st::themePreviewMargin.left(), st::themePreviewTitleTop, st::themePreviewMargin.right(), titleRect.height() - st::themePreviewTitleTop - st::themePreviewTitleFont->height));
	if (titleRect.intersects(clip)) {
		p.setFont(st::themePreviewTitleFont);
		p.setPen(st::themePreviewTitleFg);
		p.drawTextLeft(titleRect.x(), titleRect.y(), width(), lang(lng_theme_preview_title));
	}

	auto buttonsRect = QRect(_themePreviewRect.x(), _themePreviewRect.y() + _themePreviewRect.height() - st::themePreviewMargin.bottom(), _themePreviewRect.width(), st::themePreviewMargin.bottom());
	if (auto fillButtonsRect = (buttonsRect.y() + buttonsRect.height() > height())) {
		buttonsRect.moveTop(height() - buttonsRect.height());
		fillOverlay(buttonsRect);
	}
}

void OverlayWidget::paintLottieFrame(Painter &p, QRect clip) {
	Expects(_lottie != nullptr);

	if (_lottie->data->ready()) {
		_lottie->data->markFrameShown();
		const auto frame = _lottie->data->frame(Lottie::FrameRequest());
		const auto x = (width() - frame.width()) / 2;
		const auto y = (height() - frame.height()) / 2;
		const auto background = _lottieDark ? Qt::black : Qt::white;
		p.fillRect(x, y, frame.width(), frame.height(), background);
		p.drawImage(x, y, frame);
	}
}

void OverlayWidget::keyPressEvent(QKeyEvent *e) {
	const auto ctrl = e->modifiers().testFlag(Qt::ControlModifier);
	if (_streamed) {
		// Ctrl + F for full screen toggle is in eventFilter().
		const auto toggleFull = (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return)
			&& (e->modifiers().testFlag(Qt::AltModifier) || ctrl);
		if (toggleFull) {
			playbackToggleFullScreen();
			return;
		} else if (e->key() == Qt::Key_Space) {
			playbackPauseResume();
			return;
		} else if (_fullScreenVideo) {
			if (e->key() == Qt::Key_Escape) {
				playbackToggleFullScreen();
			}
			return;
		}
	}
	if (!_menu && e->key() == Qt::Key_Escape) {
		if (_doc && _doc->loading()) {
			onDocClick();
		} else {
			close();
		}
	} else if (e == QKeySequence::Save || e == QKeySequence::SaveAs) {
		onSaveAs();
	} else if (e->key() == Qt::Key_Copy || (e->key() == Qt::Key_C && ctrl)) {
		onCopy();
	} else if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return || e->key() == Qt::Key_Space) {
		if (_doc && !_doc->loading() && (documentBubbleShown() || !_doc->loaded())) {
			onDocClick();
		} else if (_streamed) {
			playbackPauseResume();
		}
	} else if (e->key() == Qt::Key_Left) {
		if (_controlsHideTimer.isActive()) {
			activateControls();
		}
		moveToNext(-1);
	} else if (e->key() == Qt::Key_Right) {
		if (_controlsHideTimer.isActive()) {
			activateControls();
		}
		moveToNext(1);
	} else if (ctrl) {
		if (e->key() == Qt::Key_Plus || e->key() == Qt::Key_Equal || e->key() == Qt::Key_Asterisk || e->key() == ']') {
			zoomIn();
		} else if (e->key() == Qt::Key_Minus || e->key() == Qt::Key_Underscore) {
			zoomOut();
		} else if (e->key() == Qt::Key_0) {
			zoomReset();
		} else if (e->key() == Qt::Key_I) {
			_lottieDark = !_lottieDark;
			update();
		}
	}
}

void OverlayWidget::wheelEvent(QWheelEvent *e) {
#ifdef OS_MAC_OLD
	constexpr auto step = 120;
#else // OS_MAC_OLD
	constexpr auto step = static_cast<int>(QWheelEvent::DefaultDeltasPerStep);
#endif // OS_MAC_OLD

	_verticalWheelDelta += e->angleDelta().y();
	while (qAbs(_verticalWheelDelta) >= step) {
		if (_verticalWheelDelta < 0) {
			_verticalWheelDelta += step;
			if (e->modifiers().testFlag(Qt::ControlModifier)) {
				zoomOut();
			} else {
#ifndef OS_MAC_OLD
				if (e->source() == Qt::MouseEventNotSynthesized) {
					moveToNext(1);
				}
#endif // OS_MAC_OLD
			}
		} else {
			_verticalWheelDelta -= step;
			if (e->modifiers().testFlag(Qt::ControlModifier)) {
				zoomIn();
			} else {
#ifndef OS_MAC_OLD
				if (e->source() == Qt::MouseEventNotSynthesized) {
					moveToNext(-1);
				}
#endif // OS_MAC_OLD
			}
		}
	}
}

void OverlayWidget::setZoomLevel(int newZoom) {
	if (_zoom == newZoom) return;

	float64 nx, ny, z = (_zoom == ZoomToScreenLevel) ? _zoomToScreen : _zoom;
	const auto contentSize = videoShown()
		? ConvertScale(videoSize())
		: QSize(_width, _height);
	_w = contentSize.width();
	_h = contentSize.height();
	if (z >= 0) {
		nx = (_x - width() / 2.) / (z + 1);
		ny = (_y - height() / 2.) / (z + 1);
	} else {
		nx = (_x - width() / 2.) * (-z + 1);
		ny = (_y - height() / 2.) * (-z + 1);
	}
	_zoom = newZoom;
	z = (_zoom == ZoomToScreenLevel) ? _zoomToScreen : _zoom;
	if (z > 0) {
		_w = qRound(_w * (z + 1));
		_h = qRound(_h * (z + 1));
		_x = qRound(nx * (z + 1) + width() / 2.);
		_y = qRound(ny * (z + 1) + height() / 2.);
	} else {
		_w = qRound(_w / (-z + 1));
		_h = qRound(_h / (-z + 1));
		_x = qRound(nx / (-z + 1) + width() / 2.);
		_y = qRound(ny / (-z + 1) + height() / 2.);
	}
	snapXY();
	update();
}

OverlayWidget::Entity OverlayWidget::entityForUserPhotos(int index) const {
	Expects(_userPhotosData.has_value());

	if (index < 0 || index >= _userPhotosData->size()) {
		return { std::nullopt, nullptr };
	}
	if (auto photo = Auth().data().photo((*_userPhotosData)[index])) {
		return { photo, nullptr };
	}
	return { std::nullopt, nullptr };
}

OverlayWidget::Entity OverlayWidget::entityForSharedMedia(int index) const {
	Expects(_sharedMediaData.has_value());

	if (index < 0 || index >= _sharedMediaData->size()) {
		return { std::nullopt, nullptr };
	}
	auto value = (*_sharedMediaData)[index];
	if (const auto photo = base::get_if<not_null<PhotoData*>>(&value)) {
		// Last peer photo.
		return { *photo, nullptr };
	} else if (const auto itemId = base::get_if<FullMsgId>(&value)) {
		return entityForItemId(*itemId);
	}
	return { std::nullopt, nullptr };
}

OverlayWidget::Entity OverlayWidget::entityForCollage(int index) const {
	Expects(_collageData.has_value());

	const auto item = Auth().data().message(_msgid);
	const auto &items = _collageData->items;
	if (!item || index < 0 || index >= items.size()) {
		return { std::nullopt, nullptr };
	}
	if (const auto document = base::get_if<DocumentData*>(&items[index])) {
		return { *document, item };
	} else if (const auto photo = base::get_if<PhotoData*>(&items[index])) {
		return { *photo, item };
	}
	return { std::nullopt, nullptr };
}

OverlayWidget::Entity OverlayWidget::entityForItemId(const FullMsgId &itemId) const {
	if (const auto item = Auth().data().message(itemId)) {
		if (const auto media = item->media()) {
			if (const auto photo = media->photo()) {
				return { photo, item };
			} else if (const auto document = media->document()) {
				return { document, item };
			}
		}
		return { std::nullopt, item };
	}
	return { std::nullopt, nullptr };
}

OverlayWidget::Entity OverlayWidget::entityByIndex(int index) const {
	if (_sharedMediaData) {
		return entityForSharedMedia(index);
	} else if (_userPhotosData) {
		return entityForUserPhotos(index);
	} else if (_collageData) {
		return entityForCollage(index);
	}
	return { std::nullopt, nullptr };
}

void OverlayWidget::setContext(base::optional_variant<
		not_null<HistoryItem*>,
		not_null<PeerData*>> context) {
	if (auto item = base::get_if<not_null<HistoryItem*>>(&context)) {
		_msgid = (*item)->fullId();
		_canForwardItem = (*item)->allowsForward();
		_canDeleteItem = (*item)->canDelete();
		_history = (*item)->history();
		_peer = _history->peer;
	} else if (auto peer = base::get_if<not_null<PeerData*>>(&context)) {
		_msgid = FullMsgId();
		_canForwardItem = _canDeleteItem = false;
		_history = (*peer)->owner().history(*peer);
		_peer = *peer;
	} else {
		_msgid = FullMsgId();
		_canForwardItem = _canDeleteItem = false;
		_history = nullptr;
		_peer = nullptr;
	}
	_migrated = nullptr;
	if (_history) {
		if (_history->peer->migrateFrom()) {
			_migrated = _history->owner().history(_history->peer->migrateFrom());
		} else if (_history->peer->migrateTo()) {
			_migrated = _history;
			_history = _history->owner().history(_history->peer->migrateTo());
		}
	}
	_user = _peer ? _peer->asUser() : nullptr;
}

bool OverlayWidget::moveToNext(int delta) {
	if (!_index) {
		return false;
	}
	auto newIndex = *_index + delta;
	return moveToEntity(entityByIndex(newIndex));
}

bool OverlayWidget::moveToEntity(const Entity &entity, int preloadDelta) {
	if (!entity.data && !entity.item) {
		return false;
	}
	if (const auto item = entity.item) {
		setContext(item);
	} else if (_peer) {
		setContext(_peer);
	} else {
		setContext(std::nullopt);
	}
	clearStreaming();
	clearLottie();
	_streamingStartPaused = false;
	if (auto photo = base::get_if<not_null<PhotoData*>>(&entity.data)) {
		displayPhoto(*photo, entity.item);
	} else if (auto document = base::get_if<not_null<DocumentData*>>(&entity.data)) {
		displayDocument(*document, entity.item);
	} else {
		displayDocument(nullptr, entity.item);
	}
	preloadData(preloadDelta);
	return true;
}

void OverlayWidget::preloadData(int delta) {
	if (!_index) {
		return;
	}
	auto from = *_index + (delta ? delta : -1);
	auto till = *_index + (delta ? delta * kPreloadCount : 1);
	if (from > till) std::swap(from, till);

	if (delta != 0) {
		auto forgetIndex = *_index - delta * 2;
		auto entity = entityByIndex(forgetIndex);
		if (auto photo = base::get_if<not_null<PhotoData*>>(&entity.data)) {
			(*photo)->unload();
		} else if (auto document = base::get_if<not_null<DocumentData*>>(&entity.data)) {
			(*document)->unload();
		}
	}

	for (auto index = from; index != till; ++index) {
		auto entity = entityByIndex(index);
		if (auto photo = base::get_if<not_null<PhotoData*>>(&entity.data)) {
			(*photo)->download(fileOrigin());
		} else if (auto document = base::get_if<not_null<DocumentData*>>(&entity.data)) {
			if (const auto image = (*document)->getStickerLarge()) {
				image->load(fileOrigin());
			} else {
				(*document)->loadThumbnail(fileOrigin());
				(*document)->automaticLoad(fileOrigin(), entity.item);
			}
		}
	}
}

void OverlayWidget::mousePressEvent(QMouseEvent *e) {
	updateOver(e->pos());
	if (_menu || !_receiveMouse) return;

	ClickHandler::pressed();

	if (e->button() == Qt::LeftButton) {
		_down = OverNone;
		if (!ClickHandler::getPressed()) {
			if (_over == OverLeftNav && moveToNext(-1)) {
				_lastAction = e->pos();
			} else if (_over == OverRightNav && moveToNext(1)) {
				_lastAction = e->pos();
			} else if (_over == OverName
				|| _over == OverDate
				|| _over == OverHeader
				|| _over == OverSave
				|| _over == OverIcon
				|| _over == OverMore
				|| _over == OverClose
				|| _over == OverVideo) {
				_down = _over;
			} else if (!_saveMsg.contains(e->pos()) || !_saveMsgStarted) {
				_pressed = true;
				_dragging = 0;
				updateCursor();
				_mStart = e->pos();
				_xStart = _x;
				_yStart = _y;
			}
		}
	} else if (e->button() == Qt::MiddleButton) {
		zoomReset();
	}
	activateControls();
}

void OverlayWidget::mouseDoubleClickEvent(QMouseEvent *e) {
	updateOver(e->pos());

	if (_over == OverVideo) {
		playbackToggleFullScreen();
		playbackPauseResume();
	} else {
		e->ignore();
		return OverlayParent::mouseDoubleClickEvent(e);
	}
}

void OverlayWidget::snapXY() {
	int32 xmin = width() - _w, xmax = 0;
	int32 ymin = height() - _h, ymax = 0;
	if (xmin > (width() - _w) / 2) xmin = (width() - _w) / 2;
	if (xmax < (width() - _w) / 2) xmax = (width() - _w) / 2;
	if (ymin > (height() - _h) / 2) ymin = (height() - _h) / 2;
	if (ymax < (height() - _h) / 2) ymax = (height() - _h) / 2;
	if (_x < xmin) _x = xmin;
	if (_x > xmax) _x = xmax;
	if (_y < ymin) _y = ymin;
	if (_y > ymax) _y = ymax;
}

void OverlayWidget::mouseMoveEvent(QMouseEvent *e) {
	updateOver(e->pos());
	if (_lastAction.x() >= 0 && (e->pos() - _lastAction).manhattanLength() >= st::mediaviewDeltaFromLastAction) {
		_lastAction = QPoint(-st::mediaviewDeltaFromLastAction, -st::mediaviewDeltaFromLastAction);
	}
	if (_pressed) {
		if (!_dragging && (e->pos() - _mStart).manhattanLength() >= QApplication::startDragDistance()) {
			_dragging = QRect(_x, _y, _w, _h).contains(_mStart) ? 1 : -1;
			if (_dragging > 0) {
				if (_w > width() || _h > height()) {
					setCursor(style::cur_sizeall);
				} else {
					setCursor(style::cur_default);
				}
			}
		}
		if (_dragging > 0) {
			_x = _xStart + (e->pos() - _mStart).x();
			_y = _yStart + (e->pos() - _mStart).y();
			snapXY();
			update();
		}
	}
}

void OverlayWidget::updateOverRect(OverState state) {
	switch (state) {
	case OverLeftNav: update(_leftNav); break;
	case OverRightNav: update(_rightNav); break;
	case OverName: update(_nameNav); break;
	case OverDate: update(_dateNav); break;
	case OverSave: update(_saveNavIcon); break;
	case OverIcon: update(_docIconRect); break;
	case OverHeader: update(_headerNav); break;
	case OverClose: update(_closeNav); break;
	case OverMore: update(_moreNavIcon); break;
	}
}

bool OverlayWidget::updateOverState(OverState newState) {
	bool result = true;
	if (_over != newState) {
		if (newState == OverMore && !_ignoringDropdown) {
			_dropdownShowTimer->start(0);
		} else {
			_dropdownShowTimer->stop();
		}
		updateOverRect(_over);
		updateOverRect(newState);
		if (_over != OverNone) {
			_animations[_over] = crl::now();
			const auto i = _animationOpacities.find(_over);
			if (i != end(_animationOpacities)) {
				i->second.start(0);
			} else {
				_animationOpacities.emplace(_over, anim::value(1, 0));
			}
			if (!_stateAnimation.animating()) {
				_stateAnimation.start();
			}
		} else {
			result = false;
		}
		_over = newState;
		if (newState != OverNone) {
			_animations[_over] = crl::now();
			const auto i = _animationOpacities.find(_over);
			if (i != end(_animationOpacities)) {
				i->second.start(1);
			} else {
				_animationOpacities.emplace(_over, anim::value(0, 1));
			}
			if (!_stateAnimation.animating()) {
				_stateAnimation.start();
			}
		}
		updateCursor();
	}
	return result;
}

void OverlayWidget::updateOver(QPoint pos) {
	ClickHandlerPtr lnk;
	ClickHandlerHost *lnkhost = nullptr;
	if (_saveMsgStarted && _saveMsg.contains(pos)) {
		auto textState = _saveMsgText.getState(pos - _saveMsg.topLeft() - QPoint(st::mediaviewSaveMsgPadding.left(), st::mediaviewSaveMsgPadding.top()), _saveMsg.width() - st::mediaviewSaveMsgPadding.left() - st::mediaviewSaveMsgPadding.right());
		lnk = textState.link;
		lnkhost = this;
	} else if (_captionRect.contains(pos)) {
		auto textState = _caption.getState(pos - _captionRect.topLeft(), _captionRect.width());
		lnk = textState.link;
		lnkhost = this;
	} else if (_groupThumbs && _groupThumbsRect.contains(pos)) {
		const auto point = pos - QPoint(_groupThumbsLeft, _groupThumbsTop);
		lnk = _groupThumbs->getState(point);
		lnkhost = this;
	}


	// retina
	if (pos.x() == width()) {
		pos.setX(pos.x() - 1);
	}
	if (pos.y() == height()) {
		pos.setY(pos.y() - 1);
	}

	ClickHandler::setActive(lnk, lnkhost);

	if (_pressed || _dragging) return;

	if (_fullScreenVideo) {
		updateOverState(OverVideo);
	} else if (_leftNavVisible && _leftNav.contains(pos)) {
		updateOverState(OverLeftNav);
	} else if (_rightNavVisible && _rightNav.contains(pos)) {
		updateOverState(OverRightNav);
	} else if (_from && _nameNav.contains(pos)) {
		updateOverState(OverName);
	} else if (IsServerMsgId(_msgid.msg) && _dateNav.contains(pos)) {
		updateOverState(OverDate);
	} else if (_headerHasLink && _headerNav.contains(pos)) {
		updateOverState(OverHeader);
	} else if (_saveVisible && _saveNav.contains(pos)) {
		updateOverState(OverSave);
	} else if (_doc && documentBubbleShown() && _docIconRect.contains(pos)) {
		updateOverState(OverIcon);
	} else if (_moreNav.contains(pos)) {
		updateOverState(OverMore);
	} else if (_closeNav.contains(pos)) {
		updateOverState(OverClose);
	} else if (documentContentShown() && contentRect().contains(pos)) {
		if ((_doc->isVideoFile() || _doc->isVideoMessage()) && _streamed) {
			updateOverState(OverVideo);
		} else if (!_doc->loaded()) {
			updateOverState(OverIcon);
		} else if (_over != OverNone) {
			updateOverState(OverNone);
		}
	} else if (_over != OverNone) {
		updateOverState(OverNone);
	}
}

void OverlayWidget::mouseReleaseEvent(QMouseEvent *e) {
	updateOver(e->pos());

	if (ClickHandlerPtr activated = ClickHandler::unpressed()) {
		App::activateClickHandler(activated, e->button());
		return;
	}

	if (_over == OverName && _down == OverName) {
		if (_from) {
			close();
			Ui::showPeerProfile(_from);
		}
	} else if (_over == OverDate && _down == OverDate) {
		onToMessage();
	} else if (_over == OverHeader && _down == OverHeader) {
		onOverview();
	} else if (_over == OverSave && _down == OverSave) {
		onDownload();
	} else if (_over == OverIcon && _down == OverIcon) {
		onDocClick();
	} else if (_over == OverMore && _down == OverMore) {
		QTimer::singleShot(0, this, SLOT(onDropdown()));
	} else if (_over == OverClose && _down == OverClose) {
		close();
	} else if (_over == OverVideo && _down == OverVideo) {
		if (_streamed) {
			playbackPauseResume();
		}
	} else if (_pressed) {
		if (_dragging) {
			if (_dragging > 0) {
				_x = _xStart + (e->pos() - _mStart).x();
				_y = _yStart + (e->pos() - _mStart).y();
				snapXY();
				update();
			}
			_dragging = 0;
			setCursor(style::cur_default);
		} else if ((e->pos() - _lastAction).manhattanLength() >= st::mediaviewDeltaFromLastAction) {
			if (_themePreviewShown) {
				if (!_themePreviewRect.contains(e->pos())) {
					close();
				}
			} else if (!_doc
				|| documentContentShown()
				|| !documentBubbleShown()
				|| !_docRect.contains(e->pos())) {
				close();
			}
		}
		_pressed = false;
	}
	_down = OverNone;
	if (!isHidden()) {
		activateControls();
	}
}

void OverlayWidget::contextMenuEvent(QContextMenuEvent *e) {
	if (e->reason() != QContextMenuEvent::Mouse || QRect(_x, _y, _w, _h).contains(e->pos())) {
		if (_menu) {
			_menu->deleteLater();
			_menu = nullptr;
		}
		_menu = new Ui::PopupMenu(this, st::mediaviewPopupMenu);
		updateActions();
		for_const (auto &action, _actions) {
			_menu->addAction(action.text, this, action.member);
		}
		connect(_menu, SIGNAL(destroyed(QObject*)), this, SLOT(onMenuDestroy(QObject*)));
		_menu->popup(e->globalPos());
		e->accept();
		activateControls();
	}
}

void OverlayWidget::touchEvent(QTouchEvent *e) {
	switch (e->type()) {
	case QEvent::TouchBegin: {
		if (_touchPress || e->touchPoints().isEmpty()) return;
		_touchTimer.start(QApplication::startDragTime());
		_touchPress = true;
		_touchMove = _touchRightButton = false;
		_touchStart = e->touchPoints().cbegin()->screenPos().toPoint();
	} break;

	case QEvent::TouchUpdate: {
		if (!_touchPress || e->touchPoints().isEmpty()) return;
		if (!_touchMove && (e->touchPoints().cbegin()->screenPos().toPoint() - _touchStart).manhattanLength() >= QApplication::startDragDistance()) {
			_touchMove = true;
		}
	} break;

	case QEvent::TouchEnd: {
		if (!_touchPress) return;
		auto weak = make_weak(this);
		if (!_touchMove) {
			Qt::MouseButton btn(_touchRightButton ? Qt::RightButton : Qt::LeftButton);
			auto mapped = mapFromGlobal(_touchStart);

			QMouseEvent pressEvent(QEvent::MouseButtonPress, mapped, mapped, _touchStart, btn, Qt::MouseButtons(btn), Qt::KeyboardModifiers());
			pressEvent.accept();
			if (weak) mousePressEvent(&pressEvent);

			QMouseEvent releaseEvent(QEvent::MouseButtonRelease, mapped, mapped, _touchStart, btn, Qt::MouseButtons(btn), Qt::KeyboardModifiers());
			if (weak) mouseReleaseEvent(&releaseEvent);

			if (weak && _touchRightButton) {
				QContextMenuEvent contextEvent(QContextMenuEvent::Mouse, mapped, _touchStart);
				contextMenuEvent(&contextEvent);
			}
		} else if (_touchMove) {
			if ((!_leftNavVisible || !_leftNav.contains(mapFromGlobal(_touchStart))) && (!_rightNavVisible || !_rightNav.contains(mapFromGlobal(_touchStart)))) {
				QPoint d = (e->touchPoints().cbegin()->screenPos().toPoint() - _touchStart);
				if (d.x() * d.x() > d.y() * d.y() && (d.x() > st::mediaviewSwipeDistance || d.x() < -st::mediaviewSwipeDistance)) {
					moveToNext(d.x() > 0 ? -1 : 1);
				}
			}
		}
		if (weak) {
			_touchTimer.stop();
			_touchPress = _touchMove = _touchRightButton = false;
		}
	} break;

	case QEvent::TouchCancel: {
		_touchPress = false;
		_touchTimer.stop();
	} break;
	}
}

bool OverlayWidget::eventHook(QEvent *e) {
	if (e->type() == QEvent::UpdateRequest) {
		_wasRepainted = true;
	} else if (e->type() == QEvent::TouchBegin || e->type() == QEvent::TouchUpdate || e->type() == QEvent::TouchEnd || e->type() == QEvent::TouchCancel) {
		QTouchEvent *ev = static_cast<QTouchEvent*>(e);
		if (ev->device()->type() == QTouchDevice::TouchScreen) {
			if (ev->type() != QEvent::TouchBegin || ev->touchPoints().isEmpty() || !childAt(mapFromGlobal(ev->touchPoints().cbegin()->screenPos().toPoint()))) {
				touchEvent(ev);
				return true;
			}
		}
	} else if (e->type() == QEvent::Wheel) {
		QWheelEvent *ev = static_cast<QWheelEvent*>(e);
		if (ev->phase() == Qt::ScrollBegin) {
			_accumScroll = ev->angleDelta();
		} else {
			_accumScroll += ev->angleDelta();
			if (ev->phase() == Qt::ScrollEnd) {
				if (ev->orientation() == Qt::Horizontal) {
					if (_accumScroll.x() * _accumScroll.x() > _accumScroll.y() * _accumScroll.y() && _accumScroll.x() != 0) {
						moveToNext(_accumScroll.x() > 0 ? -1 : 1);
					}
					_accumScroll = QPoint();
				}
			}
		}
	}
	return OverlayParent::eventHook(e);
}

bool OverlayWidget::eventFilter(QObject *obj, QEvent *e) {
	auto type = e->type();
	if (type == QEvent::ShortcutOverride) {
		const auto keyEvent = static_cast<QKeyEvent*>(e);
		const auto ctrl = keyEvent->modifiers().testFlag(Qt::ControlModifier);
		if (keyEvent->key() == Qt::Key_F && ctrl && _streamed) {
			playbackToggleFullScreen();
		}
		return true;
	}
	if ((type == QEvent::MouseMove || type == QEvent::MouseButtonPress || type == QEvent::MouseButtonRelease) && obj->isWidgetType()) {
		if (isAncestorOf(static_cast<QWidget*>(obj))) {
			const auto mouseEvent = static_cast<QMouseEvent*>(e);
			const auto mousePosition = mapFromGlobal(mouseEvent->globalPos());
			const auto delta = (mousePosition - _lastMouseMovePos);
			auto activate = delta.manhattanLength() >= st::mediaviewDeltaFromLastAction;
			if (activate) {
				_lastMouseMovePos = mousePosition;
			}
			if (type == QEvent::MouseButtonPress) {
				_mousePressed = true;
				activate = true;
			} else if (type == QEvent::MouseButtonRelease) {
				_mousePressed = false;
				activate = true;
			}
			if (activate) {
				activateControls();
			}
		}
	}
	return OverlayParent::eventFilter(obj, e);
}

void OverlayWidget::setVisibleHook(bool visible) {
	if (!visible) {
		_sharedMedia = nullptr;
		_sharedMediaData = std::nullopt;
		_sharedMediaDataKey = std::nullopt;
		_userPhotos = nullptr;
		_userPhotosData = std::nullopt;
		_collage = nullptr;
		_collageData = std::nullopt;
		if (_menu) _menu->hideMenu(true);
		_controlsHideTimer.stop();
		_controlsState = ControlsShown;
		_controlsOpacity = anim::value(1, 1);
		_groupThumbs = nullptr;
		_groupThumbsRect = QRect();
#ifdef USE_OPENGL_OVERLAY_WIDGET
		// QOpenGLWidget can't properly destroy a child widget if
		// it is hidden exactly after that, so it must be repainted
		// before it is hidden without the child widget.
		if (!isHidden()) {
			_dropdown->hideFast();
			hideChildren();
			_wasRepainted = false;
			repaint();
			if (!_wasRepainted) {
				// Qt has some optimization to prevent too frequent repaints.
				// If the previous repaint was less than 1/60 second it silently
				// converts repaint() call to an update() call. But we have to
				// repaint right now, before hide(), with _streamingControls destroyed.
				auto event = QEvent(QEvent::UpdateRequest);
				QApplication::sendEvent(this, &event);
			}
		}
#endif // USE_OPENGL_OVERLAY_WIDGET
	}
	OverlayParent::setVisibleHook(visible);
	if (visible) {
		QCoreApplication::instance()->installEventFilter(this);
	} else {
		QCoreApplication::instance()->removeEventFilter(this);

		clearStreaming();
		clearLottie();
		destroyThemePreview();
		_radial.stop();
		_current = QPixmap();
		_themePreview = nullptr;
		_themeApply.destroyDelayed();
		_themeCancel.destroyDelayed();
	}
}

void OverlayWidget::onMenuDestroy(QObject *obj) {
	if (_menu == obj) {
		_menu = nullptr;
		activateControls();
	}
	_receiveMouse = false;
	QTimer::singleShot(0, this, SLOT(receiveMouse()));
}

void OverlayWidget::receiveMouse() {
	_receiveMouse = true;
}

void OverlayWidget::onDropdown() {
	updateActions();
	_dropdown->clearActions();
	for_const (auto &action, _actions) {
		_dropdown->addAction(action.text, this, action.member);
	}
	_dropdown->moveToRight(0, height() - _dropdown->height());
	_dropdown->showAnimated(Ui::PanelAnimation::Origin::BottomRight);
	_dropdown->setFocus();
}

void OverlayWidget::onTouchTimer() {
	_touchRightButton = true;
}

void OverlayWidget::updateImage() {
	update(_saveMsg);
}

void OverlayWidget::findCurrent() {
	using namespace rpl::mappers;
	if (_sharedMediaData) {
		_index = _msgid
			? _sharedMediaData->indexOf(_msgid)
			: _photo ? _sharedMediaData->indexOf(_photo) : std::nullopt;
		_fullIndex = _sharedMediaData->skippedBefore()
			? (_index | func::add(*_sharedMediaData->skippedBefore()))
			: std::nullopt;
		_fullCount = _sharedMediaData->fullCount();
	} else if (_userPhotosData) {
		_index = _photo ? _userPhotosData->indexOf(_photo->id) : std::nullopt;
		_fullIndex = _userPhotosData->skippedBefore()
			? (_index | func::add(*_userPhotosData->skippedBefore()))
			: std::nullopt;
		_fullCount = _userPhotosData->fullCount();
	} else if (_collageData) {
		const auto item = _photo ? WebPageCollage::Item(_photo) : _doc;
		const auto &items = _collageData->items;
		const auto i = ranges::find(items, item);
		_index = (i != end(items))
			? std::make_optional(int(i - begin(items)))
			: std::nullopt;
		_fullIndex = _index;
		_fullCount = items.size();
	} else {
		_index = _fullIndex = _fullCount = std::nullopt;
	}
}

void OverlayWidget::updateHeader() {
	auto index = _fullIndex ? *_fullIndex : -1;
	auto count = _fullCount ? *_fullCount : -1;
	if (index >= 0 && index < count && count > 1) {
		if (_doc) {
			_headerText = lng_mediaview_file_n_of_count(lt_file, _doc->filename().isEmpty() ? lang(lng_mediaview_doc_image) : _doc->filename(), lt_n, QString::number(index + 1), lt_count, QString::number(count));
		} else {
			_headerText = lng_mediaview_n_of_count(lt_n, QString::number(index + 1), lt_count, QString::number(count));
		}
	} else {
		if (_doc) {
			_headerText = _doc->filename().isEmpty() ? lang(lng_mediaview_doc_image) : _doc->filename();
		} else if (_msgid) {
			_headerText = lang(lng_mediaview_single_photo);
		} else if (_user) {
			_headerText = lang(lng_mediaview_profile_photo);
		} else if ((_history && _history->channelId() && !_history->isMegagroup())
			|| (_peer && _peer->isChannel() && !_peer->isMegagroup())) {
			_headerText = lang(lng_mediaview_channel_photo);
		} else if (_peer) {
			_headerText = lang(lng_mediaview_group_photo);
		} else {
			_headerText = lang(lng_mediaview_single_photo);
		}
	}
	_headerHasLink = computeOverviewType() != std::nullopt;
	auto hwidth = st::mediaviewThickFont->width(_headerText);
	if (hwidth > width() / 3) {
		hwidth = width() / 3;
		_headerText = st::mediaviewThickFont->elided(_headerText, hwidth, Qt::ElideMiddle);
	}
	_headerNav = myrtlrect(st::mediaviewTextLeft, height() - st::mediaviewHeaderTop, hwidth, st::mediaviewThickFont->height);
}

float64 OverlayWidget::overLevel(OverState control) const {
	auto i = _animationOpacities.find(control);
	return (i == end(_animationOpacities))
		? (_over == control ? 1. : 0.)
		: i->second.current();
}

} // namespace View
} // namespace Media
