tdesktop/Telegram/SourceFiles/boxes/send_files_box.cpp

/*
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 "boxes/send_files_box.h"

#include "platform/platform_specific.h"
#include "lang/lang_keys.h"
#include "storage/localstorage.h"
#include "storage/storage_media_prepare.h"
#include "mainwidget.h"
#include "main/main_session.h"
#include "mtproto/mtproto_config.h"
#include "chat_helpers/message_field.h"
#include "chat_helpers/send_context_menu.h"
#include "chat_helpers/emoji_suggestions_widget.h"
#include "chat_helpers/tabbed_panel.h"
#include "chat_helpers/tabbed_selector.h"
#include "confirm_box.h"
#include "history/history_drag_area.h"
#include "history/view/history_view_schedule_box.h"
#include "core/file_utilities.h"
#include "core/mime_type.h"
#include "base/event_filter.h"
#include "ui/effects/animations.h"
#include "ui/widgets/checkbox.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/input_fields.h"
#include "ui/widgets/scroll_area.h"
#include "ui/wrap/fade_wrap.h"
#include "ui/chat/attach/attach_prepare.h"
#include "ui/chat/attach/attach_album_preview.h"
#include "ui/chat/attach/attach_single_file_preview.h"
#include "ui/text/format_values.h"
#include "ui/grouped_layout.h"
#include "ui/text/text_options.h"
#include "ui/controls/emoji_button.h"
#include "lottie/lottie_single_player.h"
#include "data/data_document.h"
#include "media/clip/media_clip_reader.h"
#include "api/api_common.h"
#include "window/window_session_controller.h"
#include "core/application.h"
#include "core/core_settings.h"
#include "facades.h" // App::LambdaDelayed.
#include "app.h"
#include "styles/style_chat.h"
#include "styles/style_layers.h"
#include "styles/style_boxes.h"
#include "styles/style_chat_helpers.h"

#include <QtCore/QMimeData>

namespace {

constexpr auto kMinPreviewWidth = 20;

using Ui::SendFilesWay;

inline bool CanAddUrls(const QList<QUrl> &urls) {
	return !urls.isEmpty() && ranges::all_of(urls, &QUrl::isLocalFile);
}

inline bool IsFirstAlbumItem(const Ui::PreparedList &list) {
	using AlbumType = Ui::PreparedFile::AlbumType;
	return (list.files.size() > 0)
		&& (list.files.front().type != AlbumType::None);
}

inline bool IsSingleItem(const Ui::PreparedList &list) {
	return list.files.size() == 1;
}

void FileDialogCallback(
	FileDialog::OpenResult &&result,
	bool isAlbum,
	Fn<void(Ui::PreparedList)> callback) {
	auto showBoxErrorCallback = [](tr::phrase<> text) {
		Ui::show(Box<InformBox>(text(tr::now)), Ui::LayerOption::KeepOther);
	};

	auto list = Storage::PreparedFileFromFilesDialog(
		std::move(result),
		isAlbum,
		std::move(showBoxErrorCallback),
		st::sendMediaPreviewSize);

	if (!list) {
		return;
	}

	callback(std::move(*list));
}

class SingleMediaPreview : public Ui::RpWidget {
public:
	static SingleMediaPreview *Create(
		QWidget *parent,
		not_null<Window::SessionController*> controller,
		const Ui::PreparedFile &file);

	SingleMediaPreview(
		QWidget *parent,
		not_null<Window::SessionController*> controller,
		QImage preview,
		bool animated,
		bool sticker,
		const QString &animatedPreviewPath);

	bool canSendAsPhoto() const {
		return _canSendAsPhoto;
	}

	rpl::producer<int> desiredHeightValue() const override;

protected:
	void paintEvent(QPaintEvent *e) override;

private:
	void preparePreview(
		QImage preview,
		const QString &animatedPreviewPath);
	void prepareAnimatedPreview(const QString &animatedPreviewPath);
	void clipCallback(Media::Clip::Notification notification);

	not_null<Window::SessionController*> _controller;
	bool _animated = false;
	bool _sticker = false;
	bool _canSendAsPhoto = false;
	QPixmap _preview;
	int _previewLeft = 0;
	int _previewWidth = 0;
	int _previewHeight = 0;
	Media::Clip::ReaderPointer _gifPreview;
	std::unique_ptr<Lottie::SinglePlayer> _lottiePreview;

};

SingleMediaPreview *SingleMediaPreview::Create(
		QWidget *parent,
		not_null<Window::SessionController*> controller,
		const Ui::PreparedFile &file) {
	auto preview = QImage();
	bool animated = false;
	bool animationPreview = false;
	if (const auto image = std::get_if<Ui::PreparedFileInformation::Image>(
			&file.information->media)) {
		preview = image->data;
		animated = animationPreview = image->animated;
	} else if (const auto video = std::get_if<Ui::PreparedFileInformation::Video>(
			&file.information->media)) {
		preview = video->thumbnail;
		animated = true;
		animationPreview = video->isGifv;
	}
	if (preview.isNull()) {
		return nullptr;
	} else if (!animated && !Storage::ValidateThumbDimensions(
			preview.width(),
			preview.height())) {
		return nullptr;
	}
	return Ui::CreateChild<SingleMediaPreview>(
		parent,
		controller,
		preview,
		animated,
		Core::IsMimeSticker(file.information->filemime),
		animationPreview ? file.path : QString());
}

SingleMediaPreview::SingleMediaPreview(
	QWidget *parent,
	not_null<Window::SessionController*> controller,
	QImage preview,
	bool animated,
	bool sticker,
	const QString &animatedPreviewPath)
: RpWidget(parent)
, _controller(controller)
, _animated(animated)
, _sticker(sticker) {
	Expects(!preview.isNull());

	_canSendAsPhoto = !_animated
		&& !_sticker
		&& Storage::ValidateThumbDimensions(
			preview.width(),
			preview.height());

	preparePreview(preview, animatedPreviewPath);
}

void SingleMediaPreview::preparePreview(
		QImage preview,
		const QString &animatedPreviewPath) {
	auto maxW = 0;
	auto maxH = 0;
	if (_animated && !_sticker) {
		auto limitW = st::sendMediaPreviewSize;
		auto limitH = st::confirmMaxHeight;
		maxW = qMax(preview.width(), 1);
		maxH = qMax(preview.height(), 1);
		if (maxW * limitH > maxH * limitW) {
			if (maxW < limitW) {
				maxH = maxH * limitW / maxW;
				maxW = limitW;
			}
		} else {
			if (maxH < limitH) {
				maxW = maxW * limitH / maxH;
				maxH = limitH;
			}
		}
		preview = Images::prepare(
			preview,
			maxW * cIntRetinaFactor(),
			maxH * cIntRetinaFactor(),
			Images::Option::Smooth | Images::Option::Blurred,
			maxW,
			maxH);
	}
	auto originalWidth = preview.width();
	auto originalHeight = preview.height();
	if (!originalWidth || !originalHeight) {
		originalWidth = originalHeight = 1;
	}
	_previewWidth = st::sendMediaPreviewSize;
	if (preview.width() < _previewWidth) {
		_previewWidth = qMax(preview.width(), kMinPreviewWidth);
	}
	auto maxthumbh = qMin(qRound(1.5 * _previewWidth), st::confirmMaxHeight);
	_previewHeight = qRound(originalHeight * float64(_previewWidth) / originalWidth);
	if (_previewHeight > maxthumbh) {
		_previewWidth = qRound(_previewWidth * float64(maxthumbh) / _previewHeight);
		accumulate_max(_previewWidth, kMinPreviewWidth);
		_previewHeight = maxthumbh;
	}
	_previewLeft = (st::boxWideWidth - _previewWidth) / 2;

	preview = std::move(preview).scaled(
		_previewWidth * cIntRetinaFactor(),
		_previewHeight * cIntRetinaFactor(),
		Qt::IgnoreAspectRatio,
		Qt::SmoothTransformation);
	preview = Images::prepareOpaque(std::move(preview));
	_preview = App::pixmapFromImageInPlace(std::move(preview));
	_preview.setDevicePixelRatio(cRetinaFactor());

	prepareAnimatedPreview(animatedPreviewPath);
}

void SingleMediaPreview::prepareAnimatedPreview(
		const QString &animatedPreviewPath) {
	if (_sticker && _animated) {
		const auto box = QSize(_previewWidth, _previewHeight)
			* cIntRetinaFactor();
		_lottiePreview = std::make_unique<Lottie::SinglePlayer>(
			Lottie::ReadContent(QByteArray(), animatedPreviewPath),
			Lottie::FrameRequest{ box });
		_lottiePreview->updates(
		) | rpl::start_with_next([=] {
			update();
		}, lifetime());
	} else if (!animatedPreviewPath.isEmpty()) {
		auto callback = [=](Media::Clip::Notification notification) {
			clipCallback(notification);
		};
		_gifPreview = Media::Clip::MakeReader(
			animatedPreviewPath,
			std::move(callback));
	}
}

void SingleMediaPreview::clipCallback(Media::Clip::Notification notification) {
	using namespace Media::Clip;
	switch (notification) {
	case NotificationReinit: {
		if (_gifPreview && _gifPreview->state() == State::Error) {
			_gifPreview.setBad();
		}

		if (_gifPreview && _gifPreview->ready() && !_gifPreview->started()) {
			auto s = QSize(_previewWidth, _previewHeight);
			_gifPreview->start(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, RectPart::None);
		}

		update();
	} break;

	case NotificationRepaint: {
		if (_gifPreview && !_gifPreview->currentDisplayed()) {
			update();
		}
	} break;
	}
}

void SingleMediaPreview::paintEvent(QPaintEvent *e) {
	Painter p(this);

	if (!_sticker) {
		if (_previewLeft > st::boxPhotoPadding.left()) {
			p.fillRect(st::boxPhotoPadding.left(), st::boxPhotoPadding.top(), _previewLeft - st::boxPhotoPadding.left(), _previewHeight, st::confirmBg);
		}
		if (_previewLeft + _previewWidth < width() - st::boxPhotoPadding.right()) {
			p.fillRect(_previewLeft + _previewWidth, st::boxPhotoPadding.top(), width() - st::boxPhotoPadding.right() - _previewLeft - _previewWidth, _previewHeight, st::confirmBg);
		}
	}
	if (_gifPreview && _gifPreview->started()) {
		auto s = QSize(_previewWidth, _previewHeight);
		auto paused = _controller->isGifPausedAtLeastFor(Window::GifPauseReason::Layer);
		auto frame = _gifPreview->current(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, RectPart::None, paused ? 0 : crl::now());
		p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), frame);
	} else if (_lottiePreview && _lottiePreview->ready()) {
		const auto frame = _lottiePreview->frame();
		const auto size = frame.size() / cIntRetinaFactor();
		p.drawImage(
			QRect(
				_previewLeft + (_previewWidth - size.width()) / 2,
				st::boxPhotoPadding.top() + (_previewHeight - size.height()) / 2,
				size.width(),
				size.height()),
			frame);
		_lottiePreview->markFrameShown();
	} else {
		p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), _preview);
	}
	if (_animated && !_gifPreview && !_lottiePreview) {
		auto inner = QRect(_previewLeft + (_previewWidth - st::msgFileSize) / 2, st::boxPhotoPadding.top() + (_previewHeight - st::msgFileSize) / 2, st::msgFileSize, st::msgFileSize);
		p.setPen(Qt::NoPen);
		p.setBrush(st::msgDateImgBg);

		{
			PainterHighQualityEnabler hq(p);
			p.drawEllipse(inner);
		}

		auto icon = &st::historyFileInPlay;
		icon->paintInCenter(p, inner);
	}
}

rpl::producer<int> SingleMediaPreview::desiredHeightValue() const {
	return rpl::single(st::boxPhotoPadding.top() + _previewHeight);
}

rpl::producer<QString> FieldPlaceholder(
		const Ui::PreparedList &list,
		SendFilesWay way) {
	const auto isAlbum = (way == SendFilesWay::Album);
	const auto compressImages = (way != SendFilesWay::Files);
	return list.canAddCaption(isAlbum, compressImages)
		? tr::lng_photo_caption()
		: tr::lng_photos_comment();
}

} // namespace

SendFilesBox::SendFilesBox(
	QWidget*,
	not_null<Window::SessionController*> controller,
	Ui::PreparedList &&list,
	const TextWithTags &caption,
	CompressConfirm compressed,
	SendLimit limit,
	Api::SendType sendType,
	SendMenu::Type sendMenuType)
: _controller(controller)
, _sendType(sendType)
, _list(std::move(list))
, _compressConfirmInitial(compressed)
, _compressConfirm(compressed)
, _sendLimit(limit)
, _sendMenuType(sendMenuType)
, _caption(
	this,
	st::confirmCaptionArea,
	Ui::InputField::Mode::MultiLine,
	nullptr,
	caption) {
}

void SendFilesBox::initPreview(rpl::producer<int> desiredPreviewHeight) {
	setupControls();

	updateBoxSize();

	using namespace rpl::mappers;
	rpl::combine(
		std::move(desiredPreviewHeight),
		_footerHeight.value(),
		_titleHeight + _1 + _2
	) | rpl::start_with_next([=](int height) {
		setDimensions(
			st::boxWideWidth,
			std::min(st::sendMediaPreviewHeightMax, height),
			true);
	}, lifetime());

	if (_preview) {
		_preview->show();
	}
}

void SendFilesBox::prepareSingleFilePreview() {
	Expects(IsSingleItem(_list));

	const auto &file = _list.files[0];
	const auto media = SingleMediaPreview::Create(this, _controller, file);
	if (media) {
		if (!media->canSendAsPhoto()) {
			_compressConfirm = CompressConfirm::None;
		}
		_preview = media;
		initPreview(media->desiredHeightValue());
	} else {
		const auto preview = Ui::CreateChild<Ui::SingleFilePreview>(this, file);
		_compressConfirm = CompressConfirm::None;
		_preview = preview;
		initPreview(preview->desiredHeightValue());
	}
}

void SendFilesBox::prepareAlbumPreview() {
	Expects(_sendWay != nullptr);

	const auto wrap = Ui::CreateChild<Ui::ScrollArea>(
		this,
		st::boxScroll);
	_albumPreview = wrap->setOwnedWidget(object_ptr<Ui::AlbumPreview>(
		this,
		_list,
		_sendWay->value()));

	addThumbButtonHandlers(wrap);

	_preview = wrap;
	_albumPreview->show();
	setupShadows(wrap, _albumPreview);

	initPreview(_albumPreview->desiredHeightValue());

	crl::on_main([=] {
		wrap->scrollToY(_lastScrollTop);
		_lastScrollTop = 0;
	});
}

void SendFilesBox::addThumbButtonHandlers(not_null<Ui::ScrollArea*> wrap) {
	_albumPreview->thumbDeleted(
	) | rpl::start_with_next([=](auto index) {
		_lastScrollTop = wrap->scrollTop();

		_list.files.erase(_list.files.begin() + index);
		applyAlbumOrder();

		if (_preview) {
			_preview->deleteLater();
		}
		_albumPreview = nullptr;

		if (IsSingleItem(_list)) {
			_list.albumIsPossible = false;
			if (_sendWay->value() == SendFilesWay::Album) {
				_sendWay->setValue(SendFilesWay::Photos);
			}
		}

		_compressConfirm = _compressConfirmInitial;
		refreshAllAfterAlbumChanges();

	}, _albumPreview->lifetime());

	_albumPreview->thumbChanged(
	) | rpl::start_with_next([=](auto index) {
		_lastScrollTop = wrap->scrollTop();

		const auto callback = [=](FileDialog::OpenResult &&result) {
			FileDialogCallback(
				std::move(result),
				true,
				[=] (auto list) {
					_list.files[index] = std::move(list.files.front());
					applyAlbumOrder();

					if (_preview) {
						_preview->deleteLater();
					}
					_albumPreview = nullptr;

					refreshAllAfterAlbumChanges();
				});
		};

		FileDialog::GetOpenPath(
			this,
			tr::lng_choose_file(tr::now),
			FileDialog::AlbumFilesFilter(),
			crl::guard(this, callback));

	}, _albumPreview->lifetime());
}

void SendFilesBox::setupShadows(
		not_null<Ui::ScrollArea*> wrap,
		not_null<Ui::AlbumPreview*> content) {
	using namespace rpl::mappers;

	const auto topShadow = Ui::CreateChild<Ui::FadeShadow>(this);
	const auto bottomShadow = Ui::CreateChild<Ui::FadeShadow>(this);
	wrap->geometryValue(
	) | rpl::start_with_next_done([=](const QRect &geometry) {
		topShadow->resizeToWidth(geometry.width());
		topShadow->move(
			geometry.x(),
			geometry.y());
		bottomShadow->resizeToWidth(geometry.width());
		bottomShadow->move(
			geometry.x(),
			geometry.y() + geometry.height() - st::lineWidth);
	}, [t = Ui::MakeWeak(topShadow), b = Ui::MakeWeak(bottomShadow)] {
		Ui::DestroyChild(t.data());
		Ui::DestroyChild(b.data());
	}, topShadow->lifetime());

	topShadow->toggleOn(wrap->scrollTopValue() | rpl::map(_1 > 0));
	bottomShadow->toggleOn(rpl::combine(
		wrap->scrollTopValue(),
		wrap->heightValue(),
		content->heightValue(),
		_1 + _2 < _3));
}

void SendFilesBox::prepare() {
	_send = addButton(tr::lng_send_button(), [=] { send({}); });
	if (_sendType == Api::SendType::Normal) {
		SendMenu::SetupMenuAndShortcuts(
			_send,
			[=] { return _sendMenuType; },
			[=] { sendSilent(); },
			[=] { sendScheduled(); });
	}
	addButton(tr::lng_cancel(), [=] { closeBox(); });
	initSendWay();
	setupCaption();
	preparePreview();
	boxClosing() | rpl::start_with_next([=] {
		if (!_confirmed && _cancelledCallback) {
			_cancelledCallback();
		}
	}, lifetime());

	_addFileToAlbum = addLeftButton(
		tr::lng_stickers_featured_add(),
		App::LambdaDelayed(st::historyAttach.ripple.hideDuration, this, [=] {
			openDialogToAddFileToAlbum();
		}));

	updateLeftButtonVisibility();
	setupDragArea();
}

void SendFilesBox::setupDragArea() {
	// Avoid both drag areas appearing at one time.
	auto computeState = [=](const QMimeData *data) {
		using DragState = Storage::MimeDataState;
		const auto state = Storage::ComputeMimeDataState(data);
		return (state == DragState::PhotoFiles)
			? DragState::Image
			: (state == DragState::Files
				&& !Storage::ValidateDragData(data, true))
			? DragState::None
			: state;
	};
	const auto areas = DragArea::SetupDragAreaToContainer(
		this,
		[=](not_null<const QMimeData*> d) { return canAddFiles(d); },
		[=](bool f) { _caption->setAcceptDrops(f); },
		[=] { updateControlsGeometry(); },
		std::move(computeState));

	const auto droppedCallback = [=](bool compress) {
		return [=](const QMimeData *data) {
			addFiles(data);
			Window::ActivateWindow(_controller);
		};
	};
	areas.document->setDroppedCallback(droppedCallback(false));
	areas.photo->setDroppedCallback(droppedCallback(true));
	_albumChanged.events(
	) | rpl::start_with_next([=] {
		areas.document->raise();
		areas.photo->raise();
	}, lifetime());
}

void SendFilesBox::updateLeftButtonVisibility() {
	const auto isAlbum = _list.albumIsPossible
		&& (_list.files.size() < Ui::MaxAlbumItems());
	if (isAlbum || (IsSingleItem(_list) && IsFirstAlbumItem(_list))) {
		_addFileToAlbum->show();
	} else {
		_addFileToAlbum->hide();
	}
}

void SendFilesBox::refreshAllAfterAlbumChanges() {
	refreshAlbumMediaCount();
	preparePreview();
	captionResized();
	updateLeftButtonVisibility();
	_albumChanged.fire({});
}

void SendFilesBox::openDialogToAddFileToAlbum() {
	const auto callback = [=](FileDialog::OpenResult &&result) {
		FileDialogCallback(
			std::move(result),
			true,
			[=] (auto list) {
				addFiles(std::move(list));
			});
	};

	FileDialog::GetOpenPaths(
		this,
		tr::lng_choose_file(tr::now),
		FileDialog::AlbumFilesFilter(),
		crl::guard(this, callback));
}

void SendFilesBox::initSendWay() {
	refreshAlbumMediaCount();
	const auto value = [&] {
		if (_sendLimit == SendLimit::One
			&& _list.albumIsPossible
			&& _list.files.size() > 1) {
			return SendFilesWay::Album;
		}
		if (_compressConfirm == CompressConfirm::None) {
			return SendFilesWay::Files;
		} else if (_compressConfirm == CompressConfirm::No) {
			return SendFilesWay::Files;
		} else if (_compressConfirm == CompressConfirm::Yes) {
			return _list.albumIsPossible
				? SendFilesWay::Album
				: SendFilesWay::Photos;
		}
		const auto way = Core::App().settings().sendFilesWay();
		if (way == SendFilesWay::Files) {
			return way;
		} else if (way == SendFilesWay::Album) {
			return _list.albumIsPossible
				? SendFilesWay::Album
				: SendFilesWay::Photos;
		}
		return (_list.albumIsPossible && !_albumPhotosCount)
			? SendFilesWay::Album
			: SendFilesWay::Photos;
	}();
	_sendWay = std::make_shared<Ui::RadioenumGroup<SendFilesWay>>(value);
	_sendWay->setChangedCallback([=](SendFilesWay value) {
		updateCaptionPlaceholder();
		applyAlbumOrder();
		if (_albumPreview) {
			_albumPreview->setSendWay(value);
		}
		updateEmojiPanelGeometry();
		setInnerFocus();
	});
}

void SendFilesBox::updateCaptionPlaceholder() {
	if (!_caption) {
		return;
	}
	const auto sendWay = _sendWay->value();
	const auto isAlbum = (sendWay == SendFilesWay::Album);
	const auto compressImages = (sendWay != SendFilesWay::Files);
	if (!_list.canAddCaption(isAlbum, compressImages)
		&& _sendLimit == SendLimit::One) {
		_caption->hide();
		if (_emojiToggle) {
			_emojiToggle->hide();
		}
	} else {
		_caption->setPlaceholder(FieldPlaceholder(_list, sendWay));
		_caption->show();
		if (_emojiToggle) {
			_emojiToggle->show();
		}
	}
}

void SendFilesBox::refreshAlbumMediaCount() {
	_albumVideosCount = _list.albumIsPossible
		? ranges::count(
			_list.files,
			Ui::PreparedFile::AlbumType::Video,
			[](const Ui::PreparedFile &file) { return file.type; })
		: 0;
	_albumPhotosCount = _list.albumIsPossible
		? (_list.files.size() - _albumVideosCount)
		: 0;
}

void SendFilesBox::preparePreview() {
	if (IsSingleItem(_list)) {
		prepareSingleFilePreview();
	} else {
		if (_list.albumIsPossible) {
			prepareAlbumPreview();
		} else {
			auto desiredPreviewHeight = rpl::single(0);
			initPreview(std::move(desiredPreviewHeight));
		}
	}
}

void SendFilesBox::setupControls() {
	setupTitleText();
	setupSendWayControls();
}

void SendFilesBox::setupSendWayControls() {
	_sendAlbum.destroy();
	_sendPhotos.destroy();
	_sendFiles.destroy();
	if (_compressConfirm == CompressConfirm::None
		|| _sendLimit == SendLimit::One) {
		return;
	}
	const auto addRadio = [&](
			object_ptr<Ui::Radioenum<SendFilesWay>> &button,
			SendFilesWay value,
			const QString &text) {
		const auto &style = st::defaultBoxCheckbox;
		button.create(this, _sendWay, value, text, style);
		button->show();
	};
	if (_list.albumIsPossible) {
		addRadio(_sendAlbum, SendFilesWay::Album, tr::lng_send_album(tr::now));
	}
	if (!_list.albumIsPossible || _albumPhotosCount > 0) {
		addRadio(_sendPhotos, SendFilesWay::Photos, IsSingleItem(_list)
			? tr::lng_send_photo(tr::now)
			: (_albumVideosCount > 0)
			? tr::lng_send_separate_photos_videos(tr::now)
			: (_list.albumIsPossible
				? tr::lng_send_separate_photos(tr::now)
				: tr::lng_send_photos(tr::now, lt_count, _list.files.size())));
	}
	addRadio(_sendFiles, SendFilesWay::Files, (IsSingleItem(_list))
		? tr::lng_send_file(tr::now)
		: tr::lng_send_files(tr::now, lt_count, _list.files.size()));
}

void SendFilesBox::applyAlbumOrder() {
	if (!_albumPreview) {
		return;
	}

	const auto order = _albumPreview->takeOrder();
	const auto isDefault = [&] {
		for (auto i = 0, count = int(order.size()); i != count; ++i) {
			if (order[i] != i) {
				return false;
			}
		}
		return true;
	}();
	if (isDefault) {
		return;
	}

	_list = Ui::PreparedList::Reordered(std::move(_list), order);
}

void SendFilesBox::setupCaption() {
	_caption->setMaxLength(
		_controller->session().serverConfig().captionLengthMax);
	_caption->setSubmitSettings(
		Core::App().settings().sendSubmitWay());
	connect(_caption, &Ui::InputField::resized, [=] {
		captionResized();
	});
	connect(_caption, &Ui::InputField::submitted, [=](
			Qt::KeyboardModifiers modifiers) {
		const auto ctrlShiftEnter = modifiers.testFlag(Qt::ShiftModifier)
			&& (modifiers.testFlag(Qt::ControlModifier)
				|| modifiers.testFlag(Qt::MetaModifier));
		send({}, ctrlShiftEnter);
	});
	connect(_caption, &Ui::InputField::cancelled, [=] { closeBox(); });
	_caption->setMimeDataHook([=](
			not_null<const QMimeData*> data,
			Ui::InputField::MimeAction action) {
		if (action == Ui::InputField::MimeAction::Check) {
			return canAddFiles(data);
		} else if (action == Ui::InputField::MimeAction::Insert) {
			return addFiles(data);
		}
		Unexpected("action in MimeData hook.");
	});
	_caption->setInstantReplaces(Ui::InstantReplaces::Default());
	_caption->setInstantReplacesEnabled(
		Core::App().settings().replaceEmojiValue());
	_caption->setMarkdownReplacesEnabled(rpl::single(true));
	_caption->setEditLinkCallback(
		DefaultEditLinkCallback(_controller, _caption));
	Ui::Emoji::SuggestionsController::Init(
		getDelegate()->outerContainer(),
		_caption,
		&_controller->session());

	InitSpellchecker(_controller, _caption);

	updateCaptionPlaceholder();
	setupEmojiPanel();
}

void SendFilesBox::setupEmojiPanel() {
	Expects(_caption != nullptr);

	const auto container = getDelegate()->outerContainer();
	_emojiPanel = base::make_unique_q<ChatHelpers::TabbedPanel>(
		container,
		_controller,
		object_ptr<ChatHelpers::TabbedSelector>(
			nullptr,
			_controller,
			ChatHelpers::TabbedSelector::Mode::EmojiOnly));
	_emojiPanel->setDesiredHeightValues(
		1.,
		st::emojiPanMinHeight / 2,
		st::emojiPanMinHeight);
	_emojiPanel->hide();
	_emojiPanel->selector()->emojiChosen(
	) | rpl::start_with_next([=](EmojiPtr emoji) {
		Ui::InsertEmojiAtCursor(_caption->textCursor(), emoji);
	}, lifetime());

	const auto filterCallback = [=](not_null<QEvent*> event) {
		emojiFilterForGeometry(event);
		return base::EventFilterResult::Continue;
	};
	_emojiFilter.reset(base::install_event_filter(container, filterCallback));

	_emojiToggle.create(this, st::boxAttachEmoji);
	_emojiToggle->setVisible(!_caption->isHidden());
	_emojiToggle->installEventFilter(_emojiPanel);
	_emojiToggle->addClickHandler([=] {
		_emojiPanel->toggleAnimated();
	});
}

void SendFilesBox::emojiFilterForGeometry(not_null<QEvent*> event) {
	const auto type = event->type();
	if (type == QEvent::Move || type == QEvent::Resize) {
		// updateEmojiPanelGeometry uses not only container geometry, but
		// also container children geometries that will be updated later.
		crl::on_main(this, [=] { updateEmojiPanelGeometry(); });
	}
}

void SendFilesBox::updateEmojiPanelGeometry() {
	const auto parent = _emojiPanel->parentWidget();
	const auto global = _emojiToggle->mapToGlobal({ 0, 0 });
	const auto local = parent->mapFromGlobal(global);
	_emojiPanel->moveBottomRight(
		local.y(),
		local.x() + _emojiToggle->width() * 3);
}

void SendFilesBox::captionResized() {
	updateBoxSize();
	updateControlsGeometry();
	updateEmojiPanelGeometry();
	update();
}

bool SendFilesBox::canAddFiles(not_null<const QMimeData*> data) const {
	const auto urls = data->hasUrls() ? data->urls() : QList<QUrl>();
	auto filesCount = CanAddUrls(urls) ? urls.size() : 0;
	if (!filesCount && data->hasImage()) {
		++filesCount;
	}

	if (_list.files.size() + filesCount > Ui::MaxAlbumItems()) {
		return false;
	} else if (_list.files.size() > 1 && !_albumPreview) {
		return false;
	} else if (!IsFirstAlbumItem(_list)) {
		return false;
	}
	return true;
}

bool SendFilesBox::addFiles(not_null<const QMimeData*> data) {
	auto list = [&] {
		const auto urls = data->hasUrls() ? data->urls() : QList<QUrl>();
		auto result = CanAddUrls(urls)
			? Storage::PrepareMediaList(urls, st::sendMediaPreviewSize)
			: Ui::PreparedList(
				Ui::PreparedList::Error::EmptyFile,
				QString());
		if (result.error == Ui::PreparedList::Error::None) {
			return result;
		} else if (data->hasImage()) {
			auto image = Platform::GetImageFromClipboard();
			if (image.isNull()) {
				image = qvariant_cast<QImage>(data->imageData());
			}
			if (!image.isNull()) {
				return Storage::PrepareMediaFromImage(
					std::move(image),
					QByteArray(),
					st::sendMediaPreviewSize);
			}
		}
		return result;
	}();
	return addFiles(std::move(list));
}

bool SendFilesBox::addFiles(Ui::PreparedList list) {
	const auto sumFiles = _list.files.size() + list.files.size();
	const auto cutToAlbumSize = (sumFiles > Ui::MaxAlbumItems());
	if (list.error != Ui::PreparedList::Error::None) {
		return false;
	} else if (!IsSingleItem(list) && !list.albumIsPossible) {
		return false;
	} else if (!IsFirstAlbumItem(list)) {
		return false;
	} else if (_list.files.size() > 1 && !_albumPreview) {
		return false;
	} else if (!IsFirstAlbumItem(_list)) {
		return false;
	}
	applyAlbumOrder();
	delete base::take(_preview);
	_albumPreview = nullptr;

	if (IsSingleItem(_list)
		&& _sendWay->value() == SendFilesWay::Photos) {
		_sendWay->setValue(SendFilesWay::Album);
	}
	_list.mergeToEnd(std::move(list), cutToAlbumSize);

	_compressConfirm = _compressConfirmInitial;
	refreshAllAfterAlbumChanges();
	return true;
}

void SendFilesBox::setupTitleText() {
	if (_list.files.size() > 1) {
		const auto onlyImages = (_compressConfirm != CompressConfirm::None)
			&& (_albumVideosCount == 0);
		_titleText = onlyImages
			? tr::lng_send_images_selected(tr::now, lt_count, _list.files.size())
			: tr::lng_send_files_selected(tr::now, lt_count, _list.files.size());
		_titleHeight = st::boxTitleHeight;
	} else {
		_titleText = QString();
		_titleHeight = 0;
	}
}

void SendFilesBox::updateBoxSize() {
	auto footerHeight = 0;
	if (_caption) {
		footerHeight += st::boxPhotoCaptionSkip + _caption->height();
	}
	const auto pointers = {
		_sendAlbum.data(),
		_sendPhotos.data(),
		_sendFiles.data()
	};
	for (auto pointer : pointers) {
		if (pointer) {
			footerHeight += st::boxPhotoCompressedSkip
				+ pointer->heightNoMargins();
		}
	}
	_footerHeight = footerHeight;
}

void SendFilesBox::keyPressEvent(QKeyEvent *e) {
	if (e->matches(QKeySequence::Open) && !_addFileToAlbum->isHidden()) {
		openDialogToAddFileToAlbum();
	} else if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return) {
		const auto modifiers = e->modifiers();
		const auto ctrl = modifiers.testFlag(Qt::ControlModifier)
			|| modifiers.testFlag(Qt::MetaModifier);
		const auto shift = modifiers.testFlag(Qt::ShiftModifier);
		send({}, ctrl && shift);
	} else {
		BoxContent::keyPressEvent(e);
	}
}

void SendFilesBox::paintEvent(QPaintEvent *e) {
	BoxContent::paintEvent(e);

	if (!_titleText.isEmpty()) {
		Painter p(this);

		p.setFont(st::boxPhotoTitleFont);
		p.setPen(st::boxTitleFg);
		p.drawTextLeft(
			st::boxPhotoTitlePosition.x(),
			st::boxPhotoTitlePosition.y(),
			width(),
			_titleText);
	}
}

void SendFilesBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);
	updateControlsGeometry();
}

void SendFilesBox::updateControlsGeometry() {
	auto bottom = height();
	if (_caption) {
		_caption->resize(st::sendMediaPreviewSize, _caption->height());
		_caption->moveToLeft(
			st::boxPhotoPadding.left(),
			bottom - _caption->height());
		bottom -= st::boxPhotoCaptionSkip + _caption->height();

		if (_emojiToggle) {
			_emojiToggle->moveToLeft(
				(st::boxPhotoPadding.left()
					+ st::sendMediaPreviewSize
					- _emojiToggle->width()),
				_caption->y() + st::boxAttachEmojiTop);
		}
	}
	const auto pointers = {
		_sendAlbum.data(),
		_sendPhotos.data(),
		_sendFiles.data()
	};
	for (const auto pointer : ranges::view::reverse(pointers)) {
		if (pointer) {
			pointer->moveToLeft(
				st::boxPhotoPadding.left(),
				bottom - pointer->heightNoMargins());
			bottom -= st::boxPhotoCompressedSkip + pointer->heightNoMargins();
		}
	}
	if (_preview) {
		_preview->resize(width(), bottom - _titleHeight);
		_preview->move(0, _titleHeight);
	}
}

void SendFilesBox::setInnerFocus() {
	if (!_caption || _caption->isHidden()) {
		setFocus();
	} else {
		_caption->setFocusFast();
	}
}

void SendFilesBox::send(
		Api::SendOptions options,
		bool ctrlShiftEnter) {
	if ((_sendType == Api::SendType::Scheduled
		|| _sendType == Api::SendType::ScheduledToUser)
		&& !options.scheduled) {
		return sendScheduled();
	}

	using Way = SendFilesWay;
	const auto way = _sendWay ? _sendWay->value() : Way::Files;

	if (_compressConfirm == CompressConfirm::Auto) {
		const auto oldWay = Core::App().settings().sendFilesWay();
		if (way != oldWay) {
			// Check if the user _could_ use the old value, but didn't.
			if ((oldWay == Way::Album && _sendAlbum)
				|| (oldWay == Way::Photos && _sendPhotos)
				|| (oldWay == Way::Files && _sendFiles)
				|| (way == Way::Files && (_sendAlbum || _sendPhotos))) {
				// And in that case save it to settings.
				Core::App().settings().setSendFilesWay(way);
				Core::App().saveSettingsDelayed();
			}
		}
	}

	applyAlbumOrder();
	_confirmed = true;
	if (_confirmedCallback) {
		auto caption = (_caption && !_caption->isHidden())
			? _caption->getTextWithAppliedMarkdown()
			: TextWithTags();
		_confirmedCallback(
			std::move(_list),
			way,
			std::move(caption),
			options,
			ctrlShiftEnter);
	}
	closeBox();
}

void SendFilesBox::sendSilent() {
	auto options = Api::SendOptions();
	options.silent = true;
	send(options);
}

void SendFilesBox::sendScheduled() {
	const auto type = (_sendType == Api::SendType::ScheduledToUser)
		? SendMenu::Type::ScheduledToUser
		: _sendMenuType;
	const auto callback = [=](Api::SendOptions options) { send(options); };
	Ui::show(
		HistoryView::PrepareScheduleBox(this, type, callback),
		Ui::LayerOption::KeepOther);
}

SendFilesBox::~SendFilesBox() = default;