tdesktop/Telegram/SourceFiles/window/window_controller.h

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once

#include "base/flags.h"

class MainWidget;

namespace Window {

enum class GifPauseReason {
	Any           = 0,
	InlineResults = (1 << 0),
	SavedGifs     = (1 << 1),
	Layer         = (1 << 2),
	RoundPlaying  = (1 << 3),
	MediaPreview  = (1 << 4),
};
using GifPauseReasons = base::flags<GifPauseReason>;
inline constexpr bool is_flag_type(GifPauseReason) { return true; };

class MainWindow;
class SectionMemento;

class Controller {
public:
	static constexpr auto kDefaultDialogsWidthRatio = 5. / 14;

	Controller(not_null<MainWindow*> window) : _window(window) {
	}

	not_null<MainWindow*> window() const {
		return _window;
	}

	// This is needed for History TopBar updating when searchInPeer
	// is changed in the DialogsWidget of the current window.
	base::Observable<PeerData*> &searchInPeerChanged() {
		return _searchInPeerChanged;
	}

	// This is needed while we have one HistoryWidget and one TopBarWidget
	// for all histories we show in a window. Once each history is shown
	// in its own HistoryWidget with its own TopBarWidget this can be removed.
	base::Observable<PeerData*> &historyPeerChanged() {
		return _historyPeerChanged;
	}

	void enableGifPauseReason(GifPauseReason reason);
	void disableGifPauseReason(GifPauseReason reason);
	base::Observable<void> &gifPauseLevelChanged() {
		return _gifPauseLevelChanged;
	}
	bool isGifPausedAtLeastFor(GifPauseReason reason) const;
	base::Observable<void> &floatPlayerAreaUpdated() {
		return _floatPlayerAreaUpdated;
	}

	struct ColumnLayout {
		int bodyWidth;
		int dialogsWidth;
		int chatWidth;
		int thirdWidth;
		Adaptive::WindowLayout windowLayout;
	};
	ColumnLayout computeColumnLayout() const;
	int dialogsSmallColumnWidth() const;
	void updateColumnLayout();
	bool canShowThirdSection() const;
	void resizeForThirdSection();
	void closeThirdSection();
	void showSection(
		SectionMemento &&memento,
		anim::type animated = anim::type::normal);
	void showBackFromStack();
	void showSpecialLayer(
		object_ptr<LayerWidget> &&layer,
		LayerOptions options = LayerOption::Animated);
	void hideSpecialLayer(
		LayerOptions options = LayerOption::Animated);

	void showPeerHistory(
		PeerId peerId,
		Ui::ShowWay way = Ui::ShowWay::ClearStack,
		MsgId msgId = ShowAtUnreadMsgId);
	void showPeerHistory(
		not_null<PeerData*> peer,
		Ui::ShowWay way = Ui::ShowWay::ClearStack,
		MsgId msgId = ShowAtUnreadMsgId);
	void showPeerHistory(
		not_null<History*> history,
		Ui::ShowWay way = Ui::ShowWay::ClearStack,
		MsgId msgId = ShowAtUnreadMsgId);

	void showPeerInfo(
		PeerId peerId,
		anim::type animated = anim::type::normal);
	void showPeerInfo(
		not_null<PeerData*> peer,
		anim::type animated = anim::type::normal);
	void showPeerInfo(
		not_null<History*> history,
		anim::type animated = anim::type::normal);

	void showJumpToDate(not_null<PeerData*> peer, QDate requestedDate);

	base::Variable<float64> &dialogsWidthRatio() {
		return _dialogsWidthRatio;
	}
	const base::Variable<float64> &dialogsWidthRatio() const {
		return _dialogsWidthRatio;
	}
	base::Variable<bool> &dialogsListFocused() {
		return _dialogsListFocused;
	}
	const base::Variable<bool> &dialogsListFocused() const {
		return _dialogsListFocused;
	}
	base::Variable<bool> &dialogsListDisplayForced() {
		return _dialogsListDisplayForced;
	}
	const base::Variable<bool> &dialogsListDisplayForced() const {
		return _dialogsListDisplayForced;
	}

private:
	int minimalThreeColumnWidth() const;
	not_null<MainWidget*> chats() const;

	not_null<MainWindow*> _window;

	base::Observable<PeerData*> _searchInPeerChanged;
	base::Observable<PeerData*> _historyPeerChanged;

	GifPauseReasons _gifPauseReasons = 0;
	base::Observable<void> _gifPauseLevelChanged;
	base::Observable<void> _floatPlayerAreaUpdated;

	base::Variable<float64> _dialogsWidthRatio = { kDefaultDialogsWidthRatio };
	base::Variable<bool> _dialogsListFocused = { false };
	base::Variable<bool> _dialogsListDisplayForced = { false };

};

} // namespace Window