/*
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) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "dialogswidget.h"

#include "dialogs/dialogs_indexed_list.h"
#include "dialogs/dialogs_layout.h"
#include "styles/style_dialogs.h"
#include "styles/style_stickers.h"
#include "styles/style_history.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/popup_menu.h"
#include "data/data_drafts.h"
#include "lang.h"
#include "application.h"
#include "mainwindow.h"
#include "dialogswidget.h"
#include "mainwidget.h"
#include "boxes/addcontactbox.h"
#include "boxes/contactsbox.h"
#include "boxes/confirmbox.h"
#include "boxes/aboutbox.h"
#include "localstorage.h"
#include "apiwrap.h"
#include "ui/widgets/dropdown_menu.h"
#include "ui/widgets/input_fields.h"
#include "autoupdater.h"

DialogsInner::DialogsInner(QWidget *parent, QWidget *main) : SplittedWidget(parent)
, dialogs(std_::make_unique<Dialogs::IndexedList>(Dialogs::SortMode::Date))
, contactsNoDialogs(std_::make_unique<Dialogs::IndexedList>(Dialogs::SortMode::Name))
, contacts(std_::make_unique<Dialogs::IndexedList>(Dialogs::SortMode::Name))
, _addContactLnk(this, lang(lng_add_contact_button))
, _cancelSearchInPeer(this, st::dialogsCancelSearchInPeer) {
	if (Global::DialogsModeEnabled()) {
		importantDialogs = std_::make_unique<Dialogs::IndexedList>(Dialogs::SortMode::Date);
	}
	connect(main, SIGNAL(peerNameChanged(PeerData*, const PeerData::Names&, const PeerData::NameFirstChars&)), this, SLOT(onPeerNameChanged(PeerData*, const PeerData::Names&, const PeerData::NameFirstChars&)));
	connect(main, SIGNAL(peerPhotoChanged(PeerData*)), this, SLOT(onPeerPhotoChanged(PeerData*)));
	connect(main, SIGNAL(dialogRowReplaced(Dialogs::Row*,Dialogs::Row*)), this, SLOT(onDialogRowReplaced(Dialogs::Row*,Dialogs::Row*)));
	connect(_addContactLnk, SIGNAL(clicked()), App::wnd(), SLOT(onShowAddContact()));
	connect(_cancelSearchInPeer, SIGNAL(clicked()), this, SIGNAL(cancelSearchInPeer()));
	_cancelSearchInPeer->hide();

	subscribe(FileDownload::ImageLoaded(), [this] { update(); });
	subscribe(Global::RefItemRemoved(), [this](HistoryItem *item) {
		itemRemoved(item);
	});

	refresh();
}

int DialogsInner::dialogsOffset() const {
	return importantDialogs ? st::dialogsImportantBarHeight : 0;
}

int DialogsInner::filteredOffset() const {
	return _hashtagResults.size() * st::mentionHeight;
}

int DialogsInner::peopleOffset() const {
	return filteredOffset() + (_filterResults.size() * st::dialogsRowHeight) + st::searchedBarHeight;
}

int DialogsInner::searchedOffset() const {
	int result = peopleOffset() + (_peopleResults.isEmpty() ? 0 : ((_peopleResults.size() * st::dialogsRowHeight) + st::searchedBarHeight));
	if (_searchInPeer) result += st::dialogsRowHeight;
	return result;
}

void DialogsInner::paintRegion(Painter &p, const QRegion &region, bool paintingOther) {
	QRegion original(rtl() ? region.translated(-otherWidth(), 0) : region);
	if (App::wnd() && App::wnd()->contentOverlapped(this, original)) return;

	if (!App::main()) return;

	QRect r(region.boundingRect());
	if (!paintingOther) {
		p.setClipRect(r);
	}

	if (_state == DefaultState) {
		QRect dialogsClip = r;
		if (importantDialogs) {
			Dialogs::Layout::paintImportantSwitch(p, Global::DialogsMode(), fullWidth(), _importantSwitchSel, paintingOther);
			dialogsClip.translate(0, -st::dialogsImportantBarHeight);
			p.translate(0, st::dialogsImportantBarHeight);
		}
		int32 otherStart = shownDialogs()->size() * st::dialogsRowHeight;
		PeerData *active = App::main()->activePeer(), *selected = _menuPeer ? _menuPeer : (_sel ? _sel->history()->peer : 0);
		if (otherStart) {
			shownDialogs()->all().paint(p, fullWidth(), dialogsClip.top(), dialogsClip.top() + dialogsClip.height(), active, selected, paintingOther);
		}
		if (!otherStart) {
			p.fillRect(dialogsClip, st::dialogsBg);
			if (!paintingOther) {
				p.setFont(st::noContactsFont);
				p.setPen(st::noContactsColor);
				p.drawText(QRect(0, 0, fullWidth(), st::noContactsHeight - (cContactsReceived() ? st::noContactsFont->height : 0)), lang(cContactsReceived() ? lng_no_chats : lng_contacts_loading), style::al_center);
			}
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (!_hashtagResults.isEmpty()) {
			int32 from = floorclamp(r.y(), st::mentionHeight, 0, _hashtagResults.size());
			int32 to = ceilclamp(r.y() + r.height(), st::mentionHeight, 0, _hashtagResults.size());
			p.translate(0, from * st::mentionHeight);
			if (from < _hashtagResults.size()) {
				int32 w = fullWidth(), htagwidth = w - st::dialogsPadding.x() * 2;

				p.setFont(st::mentionFont);
				for (; from < to; ++from) {
					bool selected = (from == _hashtagSel);
					p.fillRect(0, 0, w, st::mentionHeight, selected ? st::mentionBgOver : st::dialogsBg);
					if (!paintingOther) {
						if (selected) {
							int skip = (st::mentionHeight - st::simpleCloseIconOver.height()) / 2;
							st::simpleCloseIconOver.paint(p, QPoint(w - st::simpleCloseIconOver.width() - skip, skip), width());
						}
						QString first = (_hashtagFilter.size() < 2) ? QString() : ('#' + _hashtagResults.at(from).mid(0, _hashtagFilter.size() - 1)), second = (_hashtagFilter.size() < 2) ? ('#' + _hashtagResults.at(from)) : _hashtagResults.at(from).mid(_hashtagFilter.size() - 1);
						int32 firstwidth = st::mentionFont->width(first), secondwidth = st::mentionFont->width(second);
						if (htagwidth < firstwidth + secondwidth) {
							if (htagwidth < firstwidth + st::mentionFont->elidew) {
								first = st::mentionFont->elided(first + second, htagwidth);
								second = QString();
							} else {
								second = st::mentionFont->elided(second, htagwidth - firstwidth);
							}
						}

						p.setFont(st::mentionFont->f);
						if (!first.isEmpty()) {
							p.setPen((selected ? st::mentionFgOverActive : st::mentionFgActive)->p);
							p.drawText(st::dialogsPadding.x(), st::mentionTop + st::mentionFont->ascent, first);
						}
						if (!second.isEmpty()) {
							p.setPen((selected ? st::mentionFgOver : st::mentionFg)->p);
							p.drawText(st::dialogsPadding.x() + firstwidth, st::mentionTop + st::mentionFont->ascent, second);
						}
					}
					p.translate(0, st::mentionHeight);
				}
			}
		}
		if (!_filterResults.isEmpty()) {
			int32 skip = filteredOffset();
			int32 from = floorclamp(r.y() - skip, st::dialogsRowHeight, 0, _filterResults.size());
			int32 to = ceilclamp(r.y() + r.height() - skip, st::dialogsRowHeight, 0, _filterResults.size());
			p.translate(0, from * st::dialogsRowHeight);
			if (from < _filterResults.size()) {
				int32 w = fullWidth();
				PeerData *act = App::main()->activePeer();
				MsgId actId = App::main()->activeMsgId();
				for (; from < to; ++from) {
					bool active = ((_filterResults[from]->history()->peer == act) || (_filterResults[from]->history()->peer->migrateTo() && _filterResults[from]->history()->peer->migrateTo() == act)) && !actId;
					bool selected = (from == _filteredSel) || (_filterResults[from]->history()->peer == _menuPeer);
					Dialogs::Layout::RowPainter::paint(p, _filterResults[from], w, active, selected, paintingOther);
					p.translate(0, st::dialogsRowHeight);
				}
			}
		}

		if (!_peopleResults.isEmpty()) {
			p.fillRect(0, 0, fullWidth(), st::searchedBarHeight, st::searchedBarBG->b);
			if (!paintingOther) {
				p.setFont(st::searchedBarFont->f);
				p.setPen(st::searchedBarColor->p);
				p.drawText(QRect(0, 0, fullWidth(), st::searchedBarHeight), lang(lng_search_global_results), style::al_center);
			}
			p.translate(0, st::searchedBarHeight);

			int32 skip = peopleOffset();
			int32 from = floorclamp(r.y() - skip, st::dialogsRowHeight, 0, _peopleResults.size());
			int32 to = ceilclamp(r.y() + r.height() - skip, st::dialogsRowHeight, 0, _peopleResults.size());
			p.translate(0, from * st::dialogsRowHeight);
			if (from < _peopleResults.size()) {
				int32 w = fullWidth();
				PeerData *act = App::main()->activePeer();
				MsgId actId = App::main()->activeMsgId();
				for (; from < to; ++from) {
					bool active = ((_peopleResults[from] == act) || (_peopleResults[from]->migrateTo() && _peopleResults[from]->migrateTo() == act)) && !actId;
					bool selected = (from == _peopleSel);
					peopleResultPaint(_peopleResults[from], p, w, active, selected, paintingOther);
					p.translate(0, st::dialogsRowHeight);
				}
			}
		}

		if (_searchInPeer) {
			searchInPeerPaint(p, fullWidth(), paintingOther);
			p.translate(0, st::dialogsRowHeight);
			if (_state == FilteredState && _searchResults.isEmpty()) {
				p.fillRect(0, 0, fullWidth(), st::searchedBarHeight, st::searchedBarBG->b);
				if (!paintingOther) {
					p.setFont(st::searchedBarFont->f);
					p.setPen(st::searchedBarColor->p);
					p.drawText(QRect(0, 0, fullWidth(), st::searchedBarHeight), lang(lng_dlg_search_for_messages), style::al_center);
				}
				p.translate(0, st::searchedBarHeight);
			}
		}

		if (_state == SearchedState || !_searchResults.isEmpty()) {
			QString text = lng_search_found_results(lt_count, _searchResults.isEmpty() ? 0 : (_searchedMigratedCount + _searchedCount));
			p.fillRect(0, 0, fullWidth(), st::searchedBarHeight, st::searchedBarBG->b);
			if (!paintingOther) {
				p.setFont(st::searchedBarFont->f);
				p.setPen(st::searchedBarColor->p);
				p.drawText(QRect(0, 0, fullWidth(), st::searchedBarHeight), text, style::al_center);
			}
			p.translate(0, st::searchedBarHeight);

			int32 skip = searchedOffset();
			int32 from = floorclamp(r.y() - skip, st::dialogsRowHeight, 0, _searchResults.size());
			int32 to = ceilclamp(r.y() + r.height() - skip, st::dialogsRowHeight, 0, _searchResults.size());
			p.translate(0, from * st::dialogsRowHeight);
			if (from < _searchResults.size()) {
				int32 w = fullWidth();
				PeerData *act = App::main()->activePeer();
				MsgId actId = App::main()->activeMsgId();
				for (; from < to; ++from) {
					auto result = _searchResults[from];
					auto item = result->item();
					auto history = item->history();
					bool active = (history->peer == act && item->id == actId) || (history->peer->migrateTo() && history->peer->migrateTo() == act && item->id == -actId);
					bool selected = (from == _searchedSel);
					Dialogs::Layout::RowPainter::paint(p, result, w, active, selected, paintingOther);
					p.translate(0, st::dialogsRowHeight);
				}
			}
		}
	}
}

void DialogsInner::peopleResultPaint(PeerData *peer, Painter &p, int32 w, bool active, bool selected, bool onlyBackground) const {
	QRect fullRect(0, 0, w, st::dialogsRowHeight);
	p.fillRect(fullRect, active ? st::dialogsBgActive : (selected ? st::dialogsBgOver : st::dialogsBg));
	if (onlyBackground) return;

	PeerData *userpicPeer = (peer->migrateTo() ? peer->migrateTo() : peer);
	userpicPeer->paintUserpicLeft(p, st::dialogsPhotoSize, st::dialogsPadding.x(), st::dialogsPadding.y(), fullWidth());

	int32 nameleft = st::dialogsPadding.x() + st::dialogsPhotoSize + st::dialogsPhotoPadding;
	int32 namewidth = w - nameleft - st::dialogsPadding.x();
	QRect rectForName(nameleft, st::dialogsPadding.y() + st::dialogsNameTop, namewidth, st::msgNameFont->height);

	// draw chat icon
	if (auto chatTypeIcon = Dialogs::Layout::ChatTypeIcon(peer, active, selected)) {
		chatTypeIcon->paint(p, rectForName.topLeft(), w);
		rectForName.setLeft(rectForName.left() + st::dialogsChatTypeSkip);
	}
	if (peer->isVerified()) {
		auto icon = &(active ? st::dialogsVerifiedIconActive : (selected ? st::dialogsVerifiedIconOver : st::dialogsVerifiedIcon));
		rectForName.setWidth(rectForName.width() - icon->width());
		icon->paint(p, rectForName.topLeft() + QPoint(qMin(peer->dialogName().maxWidth(), rectForName.width()), 0), w);
	}

	QRect tr(nameleft, st::dialogsPadding.y() + st::msgNameFont->height + st::dialogsSkip, namewidth, st::dialogsTextFont->height);
	p.setFont(st::dialogsTextFont);
	QString username = peer->userName();
	if (!active && username.toLower().startsWith(_peopleQuery)) {
		QString first = '@' + username.mid(0, _peopleQuery.size()), second = username.mid(_peopleQuery.size());
		int32 w = st::dialogsTextFont->width(first);
		if (w >= tr.width()) {
			p.setPen(st::dialogsTextFgService);
			p.drawText(tr.left(), tr.top() + st::dialogsTextFont->ascent, st::dialogsTextFont->elided(first, tr.width()));
		} else {
			p.setPen(st::dialogsTextFgService);
			p.drawText(tr.left(), tr.top() + st::dialogsTextFont->ascent, first);
			p.setPen(st::dialogsTextFg);
			p.drawText(tr.left() + w, tr.top() + st::dialogsTextFont->ascent, st::dialogsTextFont->elided(second, tr.width() - w));
		}
	} else {
		p.setPen(active ? st::dialogsTextFgActive : st::dialogsTextFgService);
		p.drawText(tr.left(), tr.top() + st::dialogsTextFont->ascent, st::dialogsTextFont->elided('@' + username, tr.width()));
	}

	p.setPen(active ? st::dialogsTextFgActive : st::dialogsNameFg);
	peer->dialogName().drawElided(p, rectForName.left(), rectForName.top(), rectForName.width());
}

void DialogsInner::searchInPeerPaint(Painter &p, int32 w, bool onlyBackground) const {
	QRect fullRect(0, 0, w, st::dialogsRowHeight);
	p.fillRect(fullRect, st::dialogsBg);
	if (onlyBackground) return;

	_searchInPeer->paintUserpicLeft(p, st::dialogsPhotoSize, st::dialogsPadding.x(), st::dialogsPadding.y(), fullWidth());

	int32 nameleft = st::dialogsPadding.x() + st::dialogsPhotoSize + st::dialogsPhotoPadding;
	int32 namewidth = w - nameleft - st::dialogsPadding.x() * 2 - st::dialogsCancelSearch.width;
	QRect rectForName(nameleft, st::dialogsPadding.y() + st::dialogsNameTop, namewidth, st::msgNameFont->height);

	if (auto chatTypeIcon = Dialogs::Layout::ChatTypeIcon(_searchInPeer, false, false)) {
		chatTypeIcon->paint(p, rectForName.topLeft(), w);
		rectForName.setLeft(rectForName.left() + st::dialogsChatTypeSkip);
	}

	QRect tr(nameleft, st::dialogsPadding.y() + st::msgNameFont->height + st::dialogsSkip, namewidth, st::dialogsTextFont->height);
	p.setFont(st::dialogsTextFont);
	p.setPen(st::dialogsTextFg);
	p.drawText(tr.left(), tr.top() + st::dialogsTextFont->ascent, st::dialogsTextFont->elided(lang((_searchInPeer->isChannel() && !_searchInPeer->isMegagroup()) ? lng_dlg_search_channel : lng_dlg_search_chat), tr.width()));

	p.setPen(st::dialogsNameFg);
	_searchInPeer->nameText.drawElided(p, rectForName.left(), rectForName.top(), rectForName.width());
}

void DialogsInner::activate() {
}

void DialogsInner::mouseMoveEvent(QMouseEvent *e) {
	lastMousePos = mapToGlobal(e->pos());
	_selByMouse = true;
	onUpdateSelected(true);
}

void DialogsInner::onUpdateSelected(bool force) {
	QPoint mouse(mapFromGlobal(lastMousePos));
	if ((!force && !rect().contains(mouse)) || !_selByMouse) return;

	int w = width(), mouseY = mouse.y();
	_overDelete = false;
	if (_state == DefaultState) {
		auto newImportantSwitchSel = (importantDialogs && mouseY >= 0 && mouseY < dialogsOffset());
		mouseY -= dialogsOffset();
		auto newSel = newImportantSwitchSel ? nullptr : shownDialogs()->rowAtY(mouseY, st::dialogsRowHeight);
		if (newSel != _sel || newImportantSwitchSel != _importantSwitchSel) {
			updateSelectedRow();
			_sel = newSel;
			_importantSwitchSel = newImportantSwitchSel;
			updateSelectedRow();
			setCursor(_sel ? style::cur_pointer : style::cur_default);
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (!_hashtagResults.isEmpty()) {
			int32 skip = 0, newHashtagSel = (mouseY >= skip) ? ((mouseY - skip) / int32(st::mentionHeight)) : -1;
			if (newHashtagSel < 0 || newHashtagSel >= _hashtagResults.size()) {
				newHashtagSel = -1;
			}
			if (newHashtagSel != _hashtagSel) {
				updateSelectedRow();
				_hashtagSel = newHashtagSel;
				updateSelectedRow();
				setCursor((_hashtagSel >= 0) ? style::cur_pointer : style::cur_default);
			}
			if (_hashtagSel >= 0) {
				_overDelete = (mouse.x() >= w - st::mentionHeight);
			}
		}
		if (!_filterResults.isEmpty()) {
			int32 skip = filteredOffset(), newFilteredSel = (mouseY >= skip) ? ((mouseY - skip) / int32(st::dialogsRowHeight)) : -1;
			if (newFilteredSel < 0 || newFilteredSel >= _filterResults.size()) {
				newFilteredSel = -1;
			}
			if (newFilteredSel != _filteredSel) {
				updateSelectedRow();
				_filteredSel = newFilteredSel;
				updateSelectedRow();
				setCursor((_filteredSel >= 0) ? style::cur_pointer : style::cur_default);
			}
		}
		if (!_peopleResults.isEmpty()) {
			int32 skip = peopleOffset(), newPeopleSel = (mouseY >= skip) ? ((mouseY - skip) / int32(st::dialogsRowHeight)) : -1;
			if (newPeopleSel < 0 || newPeopleSel >= _peopleResults.size()) {
				newPeopleSel = -1;
			}
			if (newPeopleSel != _peopleSel) {
				updateSelectedRow();
				_peopleSel = newPeopleSel;
				updateSelectedRow();
				setCursor((_peopleSel >= 0) ? style::cur_pointer : style::cur_default);
			}
		}
		if (_state == SearchedState && !_searchResults.isEmpty()) {
			int32 skip = searchedOffset(), newSearchedSel = (mouseY >= skip) ? ((mouseY - skip) / int32(st::dialogsRowHeight)) : -1;
			if (newSearchedSel < 0 || newSearchedSel >= _searchResults.size()) {
				newSearchedSel = -1;
			}
			if (newSearchedSel != _searchedSel) {
				updateSelectedRow();
				_searchedSel = newSearchedSel;
				updateSelectedRow();
				setCursor((_searchedSel >= 0) ? style::cur_pointer : style::cur_default);
			}
		}
	}
}

void DialogsInner::mousePressEvent(QMouseEvent *e) {
	lastMousePos = mapToGlobal(e->pos());
	_selByMouse = true;
	onUpdateSelected(true);
	if (e->button() == Qt::LeftButton) {
		choosePeer();
	}
}

void DialogsInner::resizeEvent(QResizeEvent *e) {
	_addContactLnk->move((width() - _addContactLnk->width()) / 2, (st::noContactsHeight + st::noContactsFont->height) / 2);
	_cancelSearchInPeer->moveToRight(st::dialogsFilterSkip + st::dialogsFilterPadding.x() - otherWidth(), (st::dialogsRowHeight - st::dialogsCancelSearchInPeer.height) / 2);
}

void DialogsInner::onDialogRowReplaced(Dialogs::Row *oldRow, Dialogs::Row *newRow) {
	if (_state == FilteredState || _state == SearchedState) {
		for (FilteredDialogs::iterator i = _filterResults.begin(); i != _filterResults.end();) {
			if (*i == oldRow) { // this row is shown in filtered and maybe is in contacts!
				if (newRow) {
					*i = newRow;
					++i;
				} else {
					i = _filterResults.erase(i);
				}
			} else {
				++i;
			}
		}
	}
	if (_sel == oldRow) {
		_sel = newRow;
	}
}

void DialogsInner::createDialog(History *history) {
	if (history->peer->loadedStatus != PeerData::LoadedStatus::FullLoaded) {
		LOG(("API Error: DialogsInner::createDialog() called for a non loaded peer!"));
		return;
	}

	bool creating = !history->inChatList(Dialogs::Mode::All);
	if (creating) {
		auto mainRow = history->addToChatList(Dialogs::Mode::All, dialogs.get());
		contactsNoDialogs->del(history->peer, mainRow);
	}
	if (importantDialogs && !history->inChatList(Dialogs::Mode::Important) && !history->mute()) {
		if (Global::DialogsMode() == Dialogs::Mode::Important) {
			creating = true;
		}
		history->addToChatList(Dialogs::Mode::Important, importantDialogs.get());
	}

	auto changed = history->adjustByPosInChatList(Dialogs::Mode::All, dialogs.get());

	if (importantDialogs) {
		if (history->mute()) {
			if (Global::DialogsMode() == Dialogs::Mode::Important) {
				return;
			}
		} else {
			auto importantChanged = history->adjustByPosInChatList(Dialogs::Mode::Important, importantDialogs.get());
			if (Global::DialogsMode() == Dialogs::Mode::Important) {
				changed = importantChanged;
			}
		}
	}

	int from = dialogsOffset() + changed.movedFrom * st::dialogsRowHeight;
	int to = dialogsOffset() + changed.movedTo * st::dialogsRowHeight;
	emit dialogMoved(from, to);

	if (creating) {
		refresh();
	} else if (_state == DefaultState && changed.movedFrom != changed.movedTo) {
		update(0, qMin(from, to), fullWidth(), qAbs(from - to) + st::dialogsRowHeight);
	}
}

void DialogsInner::removeDialog(History *history) {
	if (!history) return;
	if (history->peer == _menuPeer && _menu) {
		_menu->deleteLater();
	}
	if (_sel && _sel->history() == history) {
		_sel = nullptr;
	}
	history->removeFromChatList(Dialogs::Mode::All, dialogs.get());
	if (importantDialogs) {
		history->removeFromChatList(Dialogs::Mode::Important, importantDialogs.get());
	}
	if (App::wnd()) App::wnd()->notifyClear(history);
	if (contacts->contains(history->peer->id)) {
		if (!contactsNoDialogs->contains(history->peer->id)) {
			contactsNoDialogs->addByName(history);
		}
	}

	Local::removeSavedPeer(history->peer);

	emit App::main()->dialogsUpdated();

	refresh();
}

void DialogsInner::dlgUpdated(Dialogs::Mode list, Dialogs::Row *row) {
	if (_state == DefaultState) {
		if (Global::DialogsMode() == list) {
			update(0, dialogsOffset() + row->pos() * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (list == Dialogs::Mode::All) {
			for (int32 i = 0, l = _filterResults.size(); i < l; ++i) {
				if (_filterResults.at(i)->history() == row->history()) {
					update(0, i * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
					break;
				}
			}
		}
	}
}

void DialogsInner::dlgUpdated(History *history, MsgId msgId) {
	if (_state == DefaultState) {
		if (auto row = shownDialogs()->getRow(history->peer->id)) {
			update(0, dialogsOffset() + row->pos() * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		int32 cnt = 0, add = filteredOffset();
		for (FilteredDialogs::const_iterator i = _filterResults.cbegin(), e = _filterResults.cend(); i != e; ++i) {
			if ((*i)->history() == history) {
				update(0, add + cnt * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
				break;
			}
			++cnt;
		}
		if (!_peopleResults.isEmpty()) {
			int32 cnt = 0, add = peopleOffset();
			for (PeopleResults::const_iterator i = _peopleResults.cbegin(), e = _peopleResults.cend(); i != e; ++i) {
				if ((*i) == history->peer) {
					update(0, add + cnt * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
					break;
				}
				++cnt;
			}
		}
		if (!_searchResults.isEmpty()) {
			int32 cnt = 0, add = searchedOffset();
			for (SearchResults::const_iterator i = _searchResults.cbegin(), e = _searchResults.cend(); i != e; ++i) {
				if ((*i)->item()->history() == history && (*i)->item()->id == msgId) {
					update(0, add + cnt * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
					break;
				}
				++cnt;
			}
		}
	}
}

void DialogsInner::enterEvent(QEvent *e) {
	setMouseTracking(true);
	lastMousePos = QCursor::pos();
	onUpdateSelected(true);
}

void DialogsInner::updateSelectedRow(PeerData *peer) {
	if (_state == DefaultState) {
		if (peer) {
			if (History *h = App::historyLoaded(peer->id)) {
				if (h->inChatList(Global::DialogsMode())) {
					update(0, dialogsOffset() + h->posInChatList(Global::DialogsMode()) * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
				}
			}
		} else if (_sel) {
			update(0, dialogsOffset() + _sel->pos() * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		} else if (_importantSwitchSel) {
			update(0, 0, fullWidth(), st::dialogsImportantBarHeight);
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (peer) {
			for (int32 i = 0, l = _filterResults.size(); i != l; ++i) {
				if (_filterResults.at(i)->history()->peer == peer) {
					update(0, filteredOffset() + i * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
					break;
				}
			}
		} else if (_hashtagSel >= 0) {
			update(0, _hashtagSel * st::mentionHeight, fullWidth(), st::mentionHeight);
		} else if (_filteredSel >= 0) {
			update(0, filteredOffset() + _filteredSel * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		} else if (_peopleSel >= 0) {
			update(0, peopleOffset() + _peopleSel * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		} else if (_searchedSel >= 0) {
			update(0, searchedOffset() + _searchedSel * st::dialogsRowHeight, fullWidth(), st::dialogsRowHeight);
		}
	}

}

void DialogsInner::leaveEvent(QEvent *e) {
	setMouseTracking(false);
	clearSelection();
}

void DialogsInner::clearSelection() {
	_selByMouse = false;
	if (_importantSwitchSel || _sel || _filteredSel >= 0 || _hashtagSel >= 0 || _searchedSel >= 0 || _peopleSel >= 0) {
		updateSelectedRow();
		_sel = nullptr;
		_importantSwitchSel = false;
		_filteredSel = _searchedSel = _peopleSel = _hashtagSel = -1;
		setCursor(style::cur_default);
	}
}

void DialogsInner::contextMenuEvent(QContextMenuEvent *e) {
	if (_menu) {
		_menu->deleteLater();
		_menu = nullptr;
	}
	if (_menuPeer) {
		updateSelectedRow(_menuPeer);
		_menuPeer = nullptr;
	}

	if (e->reason() == QContextMenuEvent::Mouse) {
		lastMousePos = e->globalPos();
		_selByMouse = true;
		onUpdateSelected(true);
	}

	History *history = nullptr;
	if (_state == DefaultState) {
		if (_sel) history = _sel->history();
	} else if (_state == FilteredState || _state == SearchedState) {
		if (_filteredSel >= 0 && _filteredSel < _filterResults.size()) {
			history = _filterResults[_filteredSel]->history();
		}
	}
	if (!history) return;
	_menuPeer = history->peer;

	_menu = new Ui::PopupMenu();
	App::main()->fillPeerMenu(_menuPeer, [this](const QString &text, base::lambda<void()> &&callback) {
		return _menu->addAction(text, std_::move(callback));
	});
	connect(_menu, SIGNAL(destroyed(QObject*)), this, SLOT(onMenuDestroyed(QObject*)));
	_menu->popup(e->globalPos());
	e->accept();
}

void DialogsInner::onMenuDestroyed(QObject *obj) {
	if (_menu == obj) {
		_menu = nullptr;
		if (_menuPeer) {
			updateSelectedRow(base::take(_menuPeer));
		}
		lastMousePos = QCursor::pos();
		if (rect().contains(mapFromGlobal(lastMousePos))) {
			_selByMouse = true;
			setMouseTracking(true);
			onUpdateSelected(true);
		}
	}
}

void DialogsInner::onParentGeometryChanged() {
	lastMousePos = QCursor::pos();
	if (rect().contains(mapFromGlobal(lastMousePos))) {
		setMouseTracking(true);
		onUpdateSelected(true);
	}
}

void DialogsInner::onPeerNameChanged(PeerData *peer, const PeerData::Names &oldNames, const PeerData::NameFirstChars &oldChars) {
	dialogs->peerNameChanged(Dialogs::Mode::All, peer, oldNames, oldChars);
	if (importantDialogs) {
		importantDialogs->peerNameChanged(Dialogs::Mode::Important, peer, oldNames, oldChars);
	}
	contactsNoDialogs->peerNameChanged(peer, oldNames, oldChars);
	contacts->peerNameChanged(peer, oldNames, oldChars);
	update();
}

void DialogsInner::onPeerPhotoChanged(PeerData *peer) {
	update();
}

void DialogsInner::onFilterUpdate(QString newFilter, bool force) {
	newFilter = textSearchKey(newFilter);
	if (newFilter != _filter || force) {
		QStringList f;
		if (!newFilter.isEmpty()) {
			QStringList filterList = newFilter.split(cWordSplit(), QString::SkipEmptyParts);
			int l = filterList.size();

			f.reserve(l);
			for (int i = 0; i < l; ++i) {
				QString filterName = filterList[i].trimmed();
				if (filterName.isEmpty()) continue;
				f.push_back(filterName);
			}
			newFilter = f.join(' ');
		}
		if (newFilter != _filter || force) {
			_filter = newFilter;
			if (!_searchInPeer && _filter.isEmpty()) {
				_state = DefaultState;
				_hashtagResults.clear();
				_filterResults.clear();
				_peopleResults.clear();
				_searchResults.clear();
				_lastSearchDate = 0;
				_lastSearchPeer = 0;
				_lastSearchId = _lastSearchMigratedId = 0;
			} else {
				QStringList::const_iterator fb = f.cbegin(), fe = f.cend(), fi;

				_state = FilteredState;
				_filterResults.clear();
				if (!_searchInPeer && !f.isEmpty()) {
					const Dialogs::List *toFilter = nullptr;
					if (!dialogs->isEmpty()) {
						for (fi = fb; fi != fe; ++fi) {
							auto found = dialogs->filtered(fi->at(0));
							if (found->isEmpty()) {
								toFilter = nullptr;
								break;
							}
							if (!toFilter || toFilter->size() > found->size()) {
								toFilter = found;
							}
						}
					}
					const Dialogs::List *toFilterContacts = nullptr;
					if (!contactsNoDialogs->isEmpty()) {
						for (fi = fb; fi != fe; ++fi) {
							auto found = contactsNoDialogs->filtered(fi->at(0));
							if (found->isEmpty()) {
								toFilterContacts = nullptr;
								break;
							}
							if (!toFilterContacts || toFilterContacts->size() > found->size()) {
								toFilterContacts = found;
							}
						}
					}
					_filterResults.reserve((toFilter ? toFilter->size() : 0) + (toFilterContacts ? toFilterContacts->size() : 0));
					if (toFilter) {
						for_const (auto row, *toFilter) {
							const PeerData::Names &names(row->history()->peer->names);
							PeerData::Names::const_iterator nb = names.cbegin(), ne = names.cend(), ni;
							for (fi = fb; fi != fe; ++fi) {
								QString filterName(*fi);
								for (ni = nb; ni != ne; ++ni) {
									if (ni->startsWith(*fi)) {
										break;
									}
								}
								if (ni == ne) {
									break;
								}
							}
							if (fi == fe) {
								_filterResults.push_back(row);
							}
						}
					}
					if (toFilterContacts) {
						for_const (auto row, *toFilterContacts) {
							const PeerData::Names &names(row->history()->peer->names);
							PeerData::Names::const_iterator nb = names.cbegin(), ne = names.cend(), ni;
							for (fi = fb; fi != fe; ++fi) {
								QString filterName(*fi);
								for (ni = nb; ni != ne; ++ni) {
									if (ni->startsWith(*fi)) {
										break;
									}
								}
								if (ni == ne) {
									break;
								}
							}
							if (fi == fe) {
								_filterResults.push_back(row);
							}
						}
					}
				}
			}
		}
		refresh(true);
		setMouseSel(false, true);
	}
	if (_state != DefaultState) {
		emit searchMessages();
	}
}

void DialogsInner::onHashtagFilterUpdate(QStringRef newFilter) {
	if (newFilter.isEmpty() || newFilter.at(0) != '#' || _searchInPeer) {
		_hashtagFilter = QString();
		if (!_hashtagResults.isEmpty()) {
			_hashtagResults.clear();
			refresh(true);
			setMouseSel(false, true);
		}
		return;
	}
	_hashtagFilter = newFilter.toString();
	if (cRecentSearchHashtags().isEmpty() && cRecentWriteHashtags().isEmpty()) {
		Local::readRecentHashtagsAndBots();
	}
	const RecentHashtagPack &recent(cRecentSearchHashtags());
	_hashtagResults.clear();
	if (!recent.isEmpty()) {
		_hashtagResults.reserve(qMin(recent.size(), 5));
		for (RecentHashtagPack::const_iterator i = recent.cbegin(), e = recent.cend(); i != e; ++i) {
			if (i->first.startsWith(_hashtagFilter.midRef(1), Qt::CaseInsensitive) && i->first.size() + 1 != newFilter.size()) {
				_hashtagResults.push_back(i->first);
				if (_hashtagResults.size() == 5) break;
			}
		}
	}
	refresh(true);
	setMouseSel(false, true);
}

DialogsInner::~DialogsInner() {
	clearSearchResults();
}

void DialogsInner::clearSearchResults(bool clearPeople) {
	if (clearPeople) _peopleResults.clear();
	if (!_searchResults.isEmpty()) {
		for (SearchResults::const_iterator i = _searchResults.cbegin(), e = _searchResults.cend(); i != e; ++i) {
			delete *i;
		}
		_searchResults.clear();
	}
	_searchedCount = _searchedMigratedCount = 0;
	_lastSearchDate = 0;
	_lastSearchPeer = 0;
	_lastSearchId = _lastSearchMigratedId = 0;
}

PeerData *DialogsInner::updateFromParentDrag(QPoint globalPos) {
	lastMousePos = globalPos;
	_selByMouse = true;
	onUpdateSelected(true);
	if (_state == DefaultState) {
		if (_sel) return _sel->history()->peer;
	} else if (_state == FilteredState || _state == SearchedState) {
		if (_filteredSel >= 0 && _filteredSel < _filterResults.size()) {
			return _filterResults[_filteredSel]->history()->peer;
		} else if (_peopleSel >= 0 && _peopleSel < _peopleResults.size()) {
			return _peopleResults[_peopleSel];
		} else if (_searchedSel >= 0 && _searchedSel < _searchResults.size()) {
			return _searchResults[_searchedSel]->item()->history()->peer;
		}
	}
	return 0;
}

void DialogsInner::itemRemoved(HistoryItem *item) {
	int wasCount = _searchResults.size();
	for (int i = 0; i < _searchResults.size();) {
		if (_searchResults[i]->item() == item) {
			_searchResults.remove(i);
			if (item->history()->peer == _searchInMigrated) {
				if (_searchedMigratedCount > 0) --_searchedMigratedCount;
			} else {
				if (_searchedCount > 0) --_searchedCount;
			}
		} else {
			++i;
		}
	}
	if (wasCount != _searchResults.size()) {
		refresh();
	}
}

void DialogsInner::dialogsReceived(const QVector<MTPDialog> &added) {
	for_const (auto &dialog, added) {
		if (dialog.type() != mtpc_dialog) {
			continue;
		}

		auto &d = dialog.c_dialog();
		auto peerId = peerFromMTP(d.vpeer);
		if (!peerId) {
			continue;
		}

		auto history = App::historyFromDialog(peerId, d.vunread_count.v, d.vread_inbox_max_id.v, d.vread_outbox_max_id.v);
		auto peer = history->peer;
		if (auto channel = peer->asChannel()) {
			if (d.has_pts()) {
				channel->ptsReceived(d.vpts.v);
			}
			if (!channel->amCreator()) {
				if (auto topMsg = App::histItemById(channel, d.vtop_message.v)) {
					if (topMsg->date <= date(channel->date) && App::api()) {
						App::api()->requestSelfParticipant(channel);
					}
				}
			}
		}
		App::main()->applyNotifySetting(MTP_notifyPeer(d.vpeer), d.vnotify_settings, history);

		if (!history->lastMsgDate.isNull()) {
			addSavedPeersAfter(history->lastMsgDate);
		}
		contactsNoDialogs->del(peer);
		if (peer->migrateFrom()) {
			removeDialog(App::historyLoaded(peer->migrateFrom()->id));
		} else if (peer->migrateTo() && peer->migrateTo()->amIn()) {
			removeDialog(history);
		}

		if (d.has_draft() && d.vdraft.type() == mtpc_draftMessage) {
			auto &draft = d.vdraft.c_draftMessage();
			Data::applyPeerCloudDraft(peerId, draft);
		}
	}
	Notify::unreadCounterUpdated();
	refresh();
}

void DialogsInner::addSavedPeersAfter(const QDateTime &date) {
	SavedPeersByTime &saved(cRefSavedPeersByTime());
	while (!saved.isEmpty() && (date.isNull() || date < saved.lastKey())) {
		History *history = App::history(saved.last()->id);
		history->setChatsListDate(saved.lastKey());
		contactsNoDialogs->del(history->peer);
		saved.remove(saved.lastKey(), saved.last());
	}
}

void DialogsInner::addAllSavedPeers() {
	addSavedPeersAfter(QDateTime());
}

bool DialogsInner::searchReceived(const QVector<MTPMessage> &messages, DialogsSearchRequestType type, int32 fullCount) {
	if (type == DialogsSearchFromStart || type == DialogsSearchPeerFromStart) {
		clearSearchResults(false);
	}
	auto isGlobalSearch = (type == DialogsSearchFromStart || type == DialogsSearchFromOffset);
	auto isMigratedSearch = (type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset);

	TimeId lastDateFound = 0;
	for_const (auto message, messages) {
		if (auto msgId = idFromMessage(message)) {
			auto peerId = peerFromMessage(message);
			auto lastDate = dateFromMessage(message);
			if (auto peer = App::peerLoaded(peerId)) {
				if (lastDate) {
					auto item = App::histories().addNewMessage(message, NewMessageExisting);
					_searchResults.push_back(new Dialogs::FakeRow(item));
					lastDateFound = lastDate;
					if (isGlobalSearch) {
						_lastSearchDate = lastDateFound;
					}
				}
				if (isGlobalSearch) {
					_lastSearchPeer = peer;
				}
			} else {
				LOG(("API Error: a search results with not loaded peer %1").arg(peerId));
			}
			if (isMigratedSearch) {
				_lastSearchMigratedId = msgId;
			} else {
				_lastSearchId = msgId;
			}
		} else {
			LOG(("API Error: a search results with not message id"));
		}
	}
	if (isMigratedSearch) {
		_searchedMigratedCount = fullCount;
	} else {
		_searchedCount = fullCount;
	}
	if (_state == FilteredState && (!_searchResults.isEmpty() || !_searchInMigrated || type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset)) {
		_state = SearchedState;
	}
	refresh();
	return lastDateFound != 0;
}

void DialogsInner::peopleReceived(const QString &query, const QVector<MTPPeer> &people) {
	_peopleQuery = query.toLower().trimmed();
	_peopleResults.clear();
	_peopleResults.reserve(people.size());
	for (auto i = people.cbegin(), e = people.cend(); i != e; ++i) {
		auto peerId = peerFromMTP(*i);
		if (auto history = App::historyLoaded(peerId)) {
			if (history->inChatList(Dialogs::Mode::All)) {
				continue; // skip existing chats
			}
		}
		if (auto peer = App::peerLoaded(peerId)) {
			_peopleResults.push_back(App::peer(peerId));
		} else {
			LOG(("API Error: user %1 was not loaded in DialogsInner::peopleReceived()").arg(peerId));
		}
	}
	refresh();
}

void DialogsInner::contactsReceived(const QVector<MTPContact> &contacts) {
	for (QVector<MTPContact>::const_iterator i = contacts.cbegin(), e = contacts.cend(); i != e; ++i) {
		int32 uid = i->c_contact().vuser_id.v;
		if (uid == MTP::authedId() && App::self()) {
			if (App::self()->contact < 1) {
				App::self()->contact = 1;
				Notify::userIsContactChanged(App::self());
			}
		}
	}
	refresh();
}

void DialogsInner::notify_userIsContactChanged(UserData *user, bool fromThisApp) {
	if (user->loadedStatus != PeerData::FullLoaded) {
		LOG(("API Error: notify_userIsContactChanged() called for a not loaded user!"));
		return;
	}
	if (user->contact > 0) {
		auto history = App::history(user->id);
		contacts->addByName(history);
		if (auto row = shownDialogs()->getRow(user->id)) {
			if (fromThisApp) {
				_sel = row;
				_importantSwitchSel = false;
			}
		} else if (!dialogs->contains(user->id)) {
			contactsNoDialogs->addByName(history);
		}
	} else {
		if (_sel && _sel->history()->peer == user) {
			_sel = nullptr;
		}
		contactsNoDialogs->del(user);
		contacts->del(user);
	}
	refresh();
}

void DialogsInner::notify_historyMuteUpdated(History *history) {
	if (!importantDialogs || !history->inChatList(Dialogs::Mode::All)) return;

	if (history->mute()) {
		if (_sel && _sel->history() == history && Global::DialogsMode() == Dialogs::Mode::Important) {
			_sel = nullptr;
		}
		history->removeFromChatList(Dialogs::Mode::Important, importantDialogs.get());
		if (Global::DialogsMode() != Dialogs::Mode::Important) {
			return;
		}
		refresh();
	} else {
		bool creating = !history->inChatList(Dialogs::Mode::Important);
		if (creating) {
			history->addToChatList(Dialogs::Mode::Important, importantDialogs.get());
		}

		auto changed = history->adjustByPosInChatList(Dialogs::Mode::All, dialogs.get());

		if (Global::DialogsMode() != Dialogs::Mode::Important) {
			return;
		}

		int from = dialogsOffset() + changed.movedFrom * st::dialogsRowHeight;
		int to = dialogsOffset() + changed.movedTo * st::dialogsRowHeight;
		emit dialogMoved(from, to);

		if (creating) {
			refresh();
		} else if (_state == DefaultState && changed.movedFrom != changed.movedTo) {
			update(0, qMin(from, to), fullWidth(), qAbs(from - to) + st::dialogsRowHeight);
		}
	}
}

void DialogsInner::refresh(bool toTop) {
	int32 h = 0;
	if (_state == DefaultState) {
		if (shownDialogs()->isEmpty()) {
			h = st::noContactsHeight;
			if (cContactsReceived()) {
				if (_addContactLnk->isHidden()) _addContactLnk->show();
			} else {
				if (!_addContactLnk->isHidden()) _addContactLnk->hide();
			}
		} else {
			h = dialogsOffset() + shownDialogs()->size() * st::dialogsRowHeight;
			if (!_addContactLnk->isHidden()) _addContactLnk->hide();
		}
	} else {
		if (!_addContactLnk->isHidden()) _addContactLnk->hide();
		if (_state == FilteredState) {
			h = searchedOffset() + (_searchResults.count() * st::dialogsRowHeight) + ((_searchResults.isEmpty() && !_searchInPeer) ? -st::searchedBarHeight : 0);
		} else if (_state == SearchedState) {
			h = searchedOffset() + (_searchResults.count() * st::dialogsRowHeight);
		}
	}
	setHeight(h);
	if (toTop) {
		emit mustScrollTo(0, 0);
		loadPeerPhotos(0);
	}
	update();
}

void DialogsInner::setMouseSel(bool msel, bool toTop) {
	_selByMouse = msel;
	if (!_selByMouse && toTop) {
		if (_state == DefaultState) {
			_sel = nullptr;
			_importantSwitchSel = false;
		} else if (_state == FilteredState || _state == SearchedState) { // don't select first elem in search
			_filteredSel = _peopleSel = _searchedSel = _hashtagSel = -1;
			setCursor(style::cur_default);
		}
	}
}

void DialogsInner::setState(State newState) {
	_state = newState;
	if (_state == DefaultState) {
		clearSearchResults();
		_searchedSel = _peopleSel = _filteredSel = _hashtagSel = -1;
	} else if (_state == DefaultState || _state == SearchedState) {
		_hashtagResults.clear();
		_hashtagSel = -1;
		_filterResults.clear();
		_filteredSel = -1;
	}
	onFilterUpdate(_filter, true);
}

DialogsInner::State DialogsInner::state() const {
	return _state;
}

bool DialogsInner::hasFilteredResults() const {
	return !_filterResults.isEmpty() && _hashtagResults.isEmpty();
}

void DialogsInner::searchInPeer(PeerData *peer) {
	_searchInPeer = peer ? (peer->migrateTo() ? peer->migrateTo() : peer) : nullptr;
	_searchInMigrated = _searchInPeer ? _searchInPeer->migrateFrom() : nullptr;
	if (_searchInPeer) {
		onHashtagFilterUpdate(QStringRef());
		_cancelSearchInPeer->show();
	} else {
		_cancelSearchInPeer->hide();
	}
}

void DialogsInner::clearFilter() {
	if (_state == FilteredState || _state == SearchedState) {
		if (_searchInPeer) {
			_state = FilteredState;
		} else {
			_state = DefaultState;
		}
		_hashtagResults.clear();
		_filterResults.clear();
		_peopleResults.clear();
		_searchResults.clear();
		_lastSearchDate = 0;
		_lastSearchPeer = 0;
		_lastSearchId = _lastSearchMigratedId = 0;
		_filter = QString();
		refresh(true);
	}
}

void DialogsInner::selectSkip(int32 direction) {
	if (_state == DefaultState) {
		if (_importantSwitchSel) {
			if (!shownDialogs()->isEmpty() && direction > 0) {
				_sel = *shownDialogs()->cbegin();
				_importantSwitchSel = false;
			} else {
				return;
			}
		} else if (!_sel) {
			if (importantDialogs) {
				_importantSwitchSel = true;
			} else if (!shownDialogs()->isEmpty() && direction > 0) {
				_sel = *shownDialogs()->cbegin();
			} else {
				return;
			}
		} else if (direction > 0) {
			auto next = shownDialogs()->cfind(_sel);
			if (++next != shownDialogs()->cend()) {
				_sel = *next;
			}
		} else {
			auto prev = shownDialogs()->cfind(_sel);
			if (prev != shownDialogs()->cbegin()) {
				_sel = *(--prev);
			} else if (importantDialogs) {
				_importantSwitchSel = true;
				_sel = nullptr;
			}
		}
		if (_importantSwitchSel || _sel) {
			int fromY = _importantSwitchSel ? 0 : (dialogsOffset() + _sel->pos() * st::dialogsRowHeight);
			emit mustScrollTo(fromY, fromY + st::dialogsRowHeight);
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (_hashtagResults.isEmpty() && _filterResults.isEmpty() && _peopleResults.isEmpty() && _searchResults.isEmpty()) return;
		if ((_hashtagSel < 0 || _hashtagSel >= _hashtagResults.size()) &&
			(_filteredSel < 0 || _filteredSel >= _filterResults.size()) &&
			(_peopleSel < 0 || _peopleSel >= _peopleResults.size()) &&
			(_searchedSel < 0 || _searchedSel >= _searchResults.size())) {
			if (_hashtagResults.isEmpty() && _filterResults.isEmpty() && _peopleResults.isEmpty()) {
				_searchedSel = 0;
			} else if (_hashtagResults.isEmpty() && _filterResults.isEmpty()) {
				_peopleSel = 0;
			} else if (_hashtagResults.isEmpty()) {
				_filteredSel = 0;
			} else {
				_hashtagSel = 0;
			}
		} else {
			int32 cur = (_hashtagSel >= 0 && _hashtagSel < _hashtagResults.size()) ? _hashtagSel : ((_filteredSel >= 0 && _filteredSel < _filterResults.size()) ? (_hashtagResults.size() + _filteredSel) : ((_peopleSel >= 0 && _peopleSel < _peopleResults.size()) ? (_peopleSel + _filterResults.size() + _hashtagResults.size()) : (_searchedSel + _peopleResults.size() + _filterResults.size() + _hashtagResults.size())));
			cur = snap(cur + direction, 0, _hashtagResults.size() + _filterResults.size() + _peopleResults.size() + _searchResults.size() - 1);
			if (cur < _hashtagResults.size()) {
				_hashtagSel = cur;
				_filteredSel = _peopleSel = _searchedSel = -1;
			} else if (cur < _hashtagResults.size() + _filterResults.size()) {
				_filteredSel = cur - _hashtagResults.size();
				_hashtagSel = _peopleSel = _searchedSel = -1;
			} else if (cur < _hashtagResults.size() + _filterResults.size() + _peopleResults.size()) {
				_peopleSel = cur - _hashtagResults.size() - _filterResults.size();
				_hashtagSel = _filteredSel = _searchedSel = -1;
			} else {
				_hashtagSel = _filteredSel = _peopleSel = -1;
				_searchedSel = cur - _hashtagResults.size() - _filterResults.size() - _peopleResults.size();
			}
		}
		if (_hashtagSel >= 0 && _hashtagSel < _hashtagResults.size()) {
			emit mustScrollTo(_hashtagSel * st::mentionHeight, (_hashtagSel + 1) * st::mentionHeight);
		} else if (_filteredSel >= 0 && _filteredSel < _filterResults.size()) {
			emit mustScrollTo(filteredOffset() + _filteredSel * st::dialogsRowHeight, filteredOffset() + (_filteredSel + 1) * st::dialogsRowHeight);
		} else if (_peopleSel >= 0 && _peopleSel < _peopleResults.size()) {
			emit mustScrollTo(peopleOffset() + _peopleSel * st::dialogsRowHeight + (_peopleSel ? 0 : -st::searchedBarHeight), peopleOffset() + (_peopleSel + 1) * st::dialogsRowHeight);
		} else {
			emit mustScrollTo(searchedOffset() + _searchedSel * st::dialogsRowHeight + (_searchedSel ? 0 : -st::searchedBarHeight), searchedOffset() + (_searchedSel + 1) * st::dialogsRowHeight);
		}
	}
	update();
}

void DialogsInner::scrollToPeer(const PeerId &peer, MsgId msgId) {
	int32 fromY = -1;
	if (_state == DefaultState) {
		if (auto row = shownDialogs()->getRow(peer)) {
			fromY = dialogsOffset() + row->pos() * st::dialogsRowHeight;
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (msgId) {
			for (int32 i = 0, c = _searchResults.size(); i < c; ++i) {
				if (_searchResults[i]->item()->history()->peer->id == peer && _searchResults[i]->item()->id == msgId) {
					fromY = searchedOffset() + i * st::dialogsRowHeight;
					break;
				}
			}
		}
		if (fromY < 0) {
			for (int32 i = 0, c = _filterResults.size(); i < c; ++i) {
				if (_filterResults[i]->history()->peer->id == peer) {
					fromY = filteredOffset() + (i * st::dialogsRowHeight);
					break;
				}
			}
		}
	}
	if (fromY >= 0) {
		emit mustScrollTo(fromY, fromY + st::dialogsRowHeight);
	}
}

void DialogsInner::selectSkipPage(int32 pixels, int32 direction) {
	int toSkip = pixels / int(st::dialogsRowHeight);
	if (_state == DefaultState) {
		if (!_sel) {
			if (direction > 0 && !shownDialogs()->isEmpty()) {
				_sel = *shownDialogs()->cbegin();
				_importantSwitchSel = false;
			} else {
				return;
			}
		}
		if (direction > 0) {
			for (auto i = shownDialogs()->cfind(_sel), end = shownDialogs()->cend(); i != end && (toSkip--); ++i) {
				_sel = *i;
			}
		} else {
			for (auto i = shownDialogs()->cfind(_sel), b = shownDialogs()->cbegin(); i != b && (toSkip--);) {
				_sel = *(--i);
			}
			if (toSkip && importantDialogs) {
				_importantSwitchSel = true;
				_sel = nullptr;
			}
		}
		if (_importantSwitchSel || _sel) {
			int fromY = (_importantSwitchSel ? 0 : (dialogsOffset() + _sel->pos() * st::dialogsRowHeight));
			emit mustScrollTo(fromY, fromY + st::dialogsRowHeight);
		}
	} else {
		return selectSkip(direction * toSkip);
	}
	update();
}

void DialogsInner::loadPeerPhotos(int32 yFrom) {
	if (!parentWidget()) return;

	int32 yTo = yFrom + parentWidget()->height() * 5;
	MTP::clearLoaderPriorities();
	if (_state == DefaultState) {
		int32 otherStart = shownDialogs()->size() * st::dialogsRowHeight;
		if (yFrom < otherStart) {
			for (auto i = shownDialogs()->cfind(yFrom, st::dialogsRowHeight), end = shownDialogs()->cend(); i != end; ++i) {
				if (((*i)->pos() * st::dialogsRowHeight) >= yTo) {
					break;
				}
				(*i)->history()->peer->loadUserpic();
			}
			yFrom = 0;
		} else {
			yFrom -= otherStart;
		}
		yTo -= otherStart;
	} else if (_state == FilteredState || _state == SearchedState) {
		int32 from = (yFrom - filteredOffset()) / st::dialogsRowHeight;
		if (from < 0) from = 0;
		if (from < _filterResults.size()) {
			int32 to = (yTo / int32(st::dialogsRowHeight)) + 1, w = width();
			if (to > _filterResults.size()) to = _filterResults.size();

			for (; from < to; ++from) {
				_filterResults[from]->history()->peer->loadUserpic();
			}
		}

		from = (yFrom > filteredOffset() + st::searchedBarHeight ? ((yFrom - filteredOffset() - st::searchedBarHeight) / int32(st::dialogsRowHeight)) : 0) - _filterResults.size();
		if (from < 0) from = 0;
		if (from < _peopleResults.size()) {
			int32 to = (yTo > filteredOffset() + st::searchedBarHeight ? ((yTo - filteredOffset() - st::searchedBarHeight) / int32(st::dialogsRowHeight)) : 0) - _filterResults.size() + 1, w = width();
			if (to > _peopleResults.size()) to = _peopleResults.size();

			for (; from < to; ++from) {
				_peopleResults[from]->loadUserpic();
			}
		}
		from = (yFrom > filteredOffset() + ((_peopleResults.isEmpty() ? 0 : st::searchedBarHeight) + st::searchedBarHeight) ? ((yFrom - filteredOffset() - (_peopleResults.isEmpty() ? 0 : st::searchedBarHeight) - st::searchedBarHeight) / int32(st::dialogsRowHeight)) : 0) - _filterResults.size() - _peopleResults.size();
		if (from < 0) from = 0;
		if (from < _searchResults.size()) {
			int32 to = (yTo > filteredOffset() + (_peopleResults.isEmpty() ? 0 : st::searchedBarHeight) + st::searchedBarHeight ? ((yTo - filteredOffset() - (_peopleResults.isEmpty() ? 0 : st::searchedBarHeight) - st::searchedBarHeight) / int32(st::dialogsRowHeight)) : 0) - _filterResults.size() - _peopleResults.size() + 1, w = width();
			if (to > _searchResults.size()) to = _searchResults.size();

			for (; from < to; ++from) {
				_searchResults[from]->item()->history()->peer->loadUserpic();
			}
		}
	}
}

bool DialogsInner::choosePeer() {
	History *history = nullptr;
	MsgId msgId = ShowAtUnreadMsgId;
	if (_state == DefaultState) {
		if (_importantSwitchSel && importantDialogs) {
			clearSelection();
			if (Global::DialogsMode() == Dialogs::Mode::All) {
				Global::SetDialogsMode(Dialogs::Mode::Important);
			} else {
				Global::SetDialogsMode(Dialogs::Mode::All);
			}
			Local::writeUserSettings();
			refresh();
			_importantSwitchSel = true;
			return true;
		} else if (_sel) {
			history = _sel->history();
		}
	} else if (_state == FilteredState || _state == SearchedState) {
		if (_hashtagSel >= 0 && _hashtagSel < _hashtagResults.size()) {
			QString hashtag = _hashtagResults.at(_hashtagSel);
			if (_overDelete) {
				lastMousePos = QCursor::pos();

				RecentHashtagPack recent(cRecentSearchHashtags());
				for (RecentHashtagPack::iterator i = recent.begin(); i != recent.cend();) {
					if (i->first == hashtag) {
						i = recent.erase(i);
					} else {
						++i;
					}
				}
				cSetRecentSearchHashtags(recent);
				Local::writeRecentHashtagsAndBots();
				emit refreshHashtags();

				_selByMouse = true;
				onUpdateSelected(true);
			} else {
				saveRecentHashtags('#' + hashtag);
				emit completeHashtag(hashtag);
			}
			return true;
		}
		if (_filteredSel >= 0 && _filteredSel < _filterResults.size()) {
			history = _filterResults[_filteredSel]->history();
		} else if (_peopleSel >= 0 && _peopleSel < _peopleResults.size()) {
			history = App::history(_peopleResults[_peopleSel]->id);
		} else if (_searchedSel >= 0 && _searchedSel < _searchResults.size()) {
			history = _searchResults[_searchedSel]->item()->history();
			msgId = _searchResults[_searchedSel]->item()->id;
		}
	}
	if (history) {
		if (msgId > 0) {
			saveRecentHashtags(_filter);
		}
		bool chosen = (!App::main()->selectingPeer(true) && (_state == FilteredState || _state == SearchedState) && _filteredSel >= 0 && _filteredSel < _filterResults.size());
		App::main()->choosePeer(history->peer->id, msgId);
		if (chosen) {
			emit searchResultChosen();
		}
		updateSelectedRow();
		_sel = nullptr;
		_filteredSel = _peopleSel = _searchedSel = _hashtagSel = -1;
		return true;
	}
	return false;
}

void DialogsInner::saveRecentHashtags(const QString &text) {
	bool found = false;
	QRegularExpressionMatch m;
	RecentHashtagPack recent(cRecentSearchHashtags());
	for (int32 i = 0, next = 0; (m = reHashtag().match(text, i)).hasMatch(); i = next) {
		i = m.capturedStart();
		next = m.capturedEnd();
		if (m.hasMatch()) {
			if (!m.capturedRef(1).isEmpty()) {
				++i;
			}
			if (!m.capturedRef(2).isEmpty()) {
				--next;
			}
		}
		if (!found && cRecentWriteHashtags().isEmpty() && cRecentSearchHashtags().isEmpty()) {
			Local::readRecentHashtagsAndBots();
			recent = cRecentSearchHashtags();
		}
		found = true;
		incrementRecentHashtag(recent, text.mid(i + 1, next - i - 1));
	}
	if (found) {
		cSetRecentSearchHashtags(recent);
		Local::writeRecentHashtagsAndBots();
	}
}

void DialogsInner::destroyData() {
	_sel = nullptr;
	_hashtagSel = -1;
	_hashtagResults.clear();
	_filteredSel = -1;
	_filterResults.clear();
	_filter.clear();
	_searchedSel = _peopleSel = -1;
	clearSearchResults();
	contacts = nullptr;
	contactsNoDialogs = nullptr;
	dialogs = nullptr;
	if (importantDialogs) {
		importantDialogs = nullptr;
	}
}

void DialogsInner::peerBefore(const PeerData *inPeer, MsgId inMsg, PeerData *&outPeer, MsgId &outMsg) const {
	if (!inPeer) {
		outPeer = nullptr;
		outMsg = 0;
		return;
	}
	if (_state == DefaultState) {
		if (auto row = shownDialogs()->getRow(inPeer->id)) {
			auto i = shownDialogs()->cfind(row);
			if (i != shownDialogs()->cbegin()) {
				outPeer = (*(--i))->history()->peer;
				outMsg = ShowAtUnreadMsgId;
				return;
			}
		}
		outPeer = nullptr;
		outMsg = 0;
		return;
	} else if (_state == FilteredState || _state == SearchedState) {
		if (inMsg && !_searchResults.isEmpty()) {
			for (SearchResults::const_iterator b = _searchResults.cbegin(), i = b + 1, e = _searchResults.cend(); i != e; ++i) {
				if ((*i)->item()->history()->peer == inPeer && (*i)->item()->id == inMsg) {
					SearchResults::const_iterator j = i - 1;
					outPeer = (*j)->item()->history()->peer;
					outMsg = (*j)->item()->id;
					return;
				}
			}
			if (_searchResults.at(0)->item()->history()->peer == inPeer && _searchResults.at(0)->item()->id == inMsg) {
				outMsg = ShowAtUnreadMsgId;
				if (_peopleResults.isEmpty()) {
					if (_filterResults.isEmpty()) {
						outPeer = nullptr;
					} else {
						outPeer = _filterResults.back()->history()->peer;
					}
				} else {
					outPeer = _peopleResults.back();
				}
				return;
			}
		}
		if (!_peopleResults.isEmpty() && _peopleResults.at(0) == inPeer) {
			outPeer = _filterResults.isEmpty() ? 0 : _filterResults.back()->history()->peer;
			outMsg = ShowAtUnreadMsgId;
			return;
		}
		if (!_peopleResults.isEmpty()) {
			for (PeopleResults::const_iterator b = _peopleResults.cbegin(), i = b + 1, e = _peopleResults.cend(); i != e; ++i) {
				if ((*i) == inPeer) {
					outPeer = (*(i - 1));
					outMsg = ShowAtUnreadMsgId;
					return;
				}
			}
		}
		if (_filterResults.isEmpty() || _filterResults.at(0)->history()->peer == inPeer) {
			outPeer = nullptr;
			outMsg = 0;
			return;
		}

		for (FilteredDialogs::const_iterator b = _filterResults.cbegin(), i = b + 1, e = _filterResults.cend(); i != e; ++i) {
			if ((*i)->history()->peer == inPeer) {
				outPeer = (*(i - 1))->history()->peer;
				outMsg = ShowAtUnreadMsgId;
				return;
			}
		}
	}
	outPeer = nullptr;
	outMsg = 0;
}

void DialogsInner::peerAfter(const PeerData *inPeer, MsgId inMsg, PeerData *&outPeer, MsgId &outMsg) const {
	if (!inPeer) {
		outPeer = nullptr;
		outMsg = 0;
		return;
	}
	if (_state == DefaultState) {
		if (auto row = shownDialogs()->getRow(inPeer->id)) {
			auto i = shownDialogs()->cfind(row) + 1;
			if (i != shownDialogs()->cend()) {
				outPeer = (*i)->history()->peer;
				outMsg = ShowAtUnreadMsgId;
				return;
			}
		}
		outPeer = nullptr;
		outMsg = 0;
		return;
	} else if (_state == FilteredState || _state == SearchedState) {
		if (inMsg) {
			for (SearchResults::const_iterator i = _searchResults.cbegin(), e = _searchResults.cend(); i != e; ++i) {
				if ((*i)->item()->history()->peer == inPeer && (*i)->item()->id == inMsg) {
					++i;
					outPeer = (i == e) ? nullptr : (*i)->item()->history()->peer;
					outMsg = (i == e) ? 0 : (*i)->item()->id;
					return;
				}
			}
		}
		for (PeopleResults::const_iterator i = _peopleResults.cbegin(), e = _peopleResults.cend(); i != e; ++i) {
			if ((*i) == inPeer) {
				++i;
				if (i == e && !_searchResults.isEmpty()) {
					outPeer = _searchResults.front()->item()->history()->peer;
					outMsg = _searchResults.front()->item()->id;
				} else {
					outPeer = (i == e) ? nullptr : (*i);
					outMsg = ShowAtUnreadMsgId;
				}
				return;
			}
		}
		for (FilteredDialogs::const_iterator i = _filterResults.cbegin(), e = _filterResults.cend(); i != e; ++i) {
			if ((*i)->history()->peer == inPeer) {
				++i;
				if (i == e && !_peopleResults.isEmpty()) {
					outPeer = _peopleResults.front();
					outMsg = ShowAtUnreadMsgId;
				} else if (i == e && !_searchResults.isEmpty()) {
					outPeer = _searchResults.front()->item()->history()->peer;
					outMsg = _searchResults.front()->item()->id;
				} else {
					outPeer = (i == e) ? nullptr : (*i)->history()->peer;
					outMsg = ShowAtUnreadMsgId;
				}
				return;
			}
		}
	}
	outPeer = nullptr;
	outMsg = 0;
}

Dialogs::IndexedList *DialogsInner::contactsList() {
	return contacts.get();
}

Dialogs::IndexedList *DialogsInner::dialogsList() {
	return dialogs.get();
}

DialogsInner::FilteredDialogs &DialogsInner::filteredList() {
	return _filterResults;
}

DialogsInner::PeopleResults &DialogsInner::peopleList() {
	return _peopleResults;
}

DialogsInner::SearchResults &DialogsInner::searchList() {
	return _searchResults;
}

int32 DialogsInner::lastSearchDate() const {
	return _lastSearchDate;
}

PeerData *DialogsInner::lastSearchPeer() const {
	return _lastSearchPeer;
}

MsgId DialogsInner::lastSearchId() const {
	return _lastSearchId;
}

MsgId DialogsInner::lastSearchMigratedId() const {
	return _lastSearchMigratedId;
}

DialogsWidget::DialogsWidget(QWidget *parent) : TWidget(parent)
, _mainMenuToggle(this, st::dialogsMenuToggle)
, _filter(this, st::dialogsFilter, lang(lng_dlg_filter))
, _cancelSearch(this, st::dialogsCancelSearch)
, _lockUnlock(this, st::dialogsLock)
, _scroll(this, st::dialogsScroll)
, _inner(this, parent)
, _a_show(animation(this, &DialogsWidget::step_show)) {
	_scroll->setOwnedWidget(_inner);
	connect(_inner, SIGNAL(mustScrollTo(int,int)), _scroll, SLOT(scrollToY(int,int)));
	connect(_inner, SIGNAL(dialogMoved(int,int)), this, SLOT(onDialogMoved(int,int)));
	connect(_inner, SIGNAL(searchMessages()), this, SLOT(onNeedSearchMessages()));
	connect(_inner, SIGNAL(searchResultChosen()), this, SLOT(onCancel()));
	connect(_inner, SIGNAL(completeHashtag(QString)), this, SLOT(onCompleteHashtag(QString)));
	connect(_inner, SIGNAL(refreshHashtags()), this, SLOT(onFilterCursorMoved()));
	connect(_inner, SIGNAL(cancelSearchInPeer()), this, SLOT(onCancelSearchInPeer()));
	connect(_scroll, SIGNAL(geometryChanged()), _inner, SLOT(onParentGeometryChanged()));
	connect(_scroll, SIGNAL(scrolled()), this, SLOT(onListScroll()));
	connect(_filter, SIGNAL(cancelled()), this, SLOT(onCancel()));
	connect(_filter, SIGNAL(changed()), this, SLOT(onFilterUpdate()));
	connect(_filter, SIGNAL(cursorPositionChanged(int,int)), this, SLOT(onFilterCursorMoved(int,int)));

#ifndef TDESKTOP_DISABLE_AUTOUPDATE
	Sandbox::connect(SIGNAL(updateLatest()), this, SLOT(onCheckUpdateStatus()));
	Sandbox::connect(SIGNAL(updateFailed()), this, SLOT(onCheckUpdateStatus()));
	Sandbox::connect(SIGNAL(updateReady()), this, SLOT(onCheckUpdateStatus()));
	onCheckUpdateStatus();
#endif // !TDESKTOP_DISABLE_AUTOUPDATE

	subscribe(Adaptive::Changed(), [this] { updateForwardBar(); });

	_cancelSearch->setClickedCallback([this] { onCancelSearch(); });
	_lockUnlock->setVisible(Global::LocalPasscode());
	subscribe(Global::RefLocalPasscodeChanged(), [this] { updateLockUnlockVisibility(); });
	_lockUnlock->setClickedCallback([this] {
		_lockUnlock->setIcon(&st::dialogsUnlockIcon, &st::dialogsUnlockIconOver);
		App::wnd()->setupPasscode();
		_lockUnlock->setIcon(nullptr);
	});
	_mainMenuToggle->setClickedCallback([this] { showMainMenu(); });

	_chooseByDragTimer.setSingleShot(true);
	connect(&_chooseByDragTimer, SIGNAL(timeout()), this, SLOT(onChooseByDrag()));

	setAcceptDrops(true);

	_searchTimer.setSingleShot(true);
	connect(&_searchTimer, SIGNAL(timeout()), this, SLOT(onSearchMessages()));

	_filter->setFocusPolicy(Qt::StrongFocus);
	_filter->customUpDown(true);
	_cancelSearch->hide();
}

#ifndef TDESKTOP_DISABLE_AUTOUPDATE
void DialogsWidget::onCheckUpdateStatus() {
	if (Sandbox::updatingState() == Application::UpdatingReady) {
		if (_updateTelegram) return;
		_updateTelegram.create(this, lang(lng_update_telegram).toUpper(), st::dialogsUpdateButton);
		_updateTelegram->show();
		_updateTelegram->setClickedCallback([] {
			checkReadyUpdate();
			App::restart();
		});
	} else {
		if (!_updateTelegram) return;
		_updateTelegram.destroy();
	}
	updateControlsGeometry();
}
#endif // TDESKTOP_DISABLE_AUTOUPDATE

void DialogsWidget::activate() {
	_filter->setFocus();
	_inner->activate();
}

void DialogsWidget::createDialog(History *history) {
	auto creating = !history->inChatList(Dialogs::Mode::All);
	_inner->createDialog(history);
	if (creating && history->peer->migrateFrom()) {
		if (auto migrated = App::historyLoaded(history->peer->migrateFrom()->id)) {
			if (migrated->inChatList(Dialogs::Mode::All)) {
				removeDialog(migrated);
			}
		}
	}
}

void DialogsWidget::dlgUpdated(Dialogs::Mode list, Dialogs::Row *row) {
	_inner->dlgUpdated(list, row);
}

void DialogsWidget::dlgUpdated(History *row, MsgId msgId) {
	_inner->dlgUpdated(row, msgId);
}

void DialogsWidget::dialogsToUp() {
	if (_filter->getLastText().trimmed().isEmpty()) {
		_scroll->scrollToY(0);
	}
}

void DialogsWidget::showFast() {
	show();
	updateForwardBar();
}

void DialogsWidget::showAnimated(Window::SlideDirection direction, const Window::SectionSlideParams &params) {
	if (App::app()) App::app()->mtpPause();

	_cacheUnder = params.oldContentCache;
	show();
	updateForwardBar();
	_cacheOver = App::main()->grabForShowAnimation(params);

	_a_show.stop();

	_scroll->hide();
	_mainMenuToggle->hide();
	if (_forwardCancel) _forwardCancel->hide();
	_filter->hide();
	_cancelSearch->hide();
	_lockUnlock->hide();

	int delta = st::slideShift;
	if (direction == Window::SlideDirection::FromLeft) {
		a_progress = anim::fvalue(1, 0);
		std::swap(_cacheUnder, _cacheOver);
		a_coordUnder = anim::ivalue(-delta, 0);
		a_coordOver = anim::ivalue(0, width());
	} else {
		a_progress = anim::fvalue(0, 1);
		a_coordUnder = anim::ivalue(0, -delta);
		a_coordOver = anim::ivalue(width(), 0);
	}
	_a_show.start();
}

void DialogsWidget::step_show(float64 ms, bool timer) {
	float64 dt = ms / st::slideDuration;
	if (dt >= 1) {
		_a_show.stop();

		a_coordUnder.finish();
		a_coordOver.finish();
		a_progress.finish();

		_cacheUnder = _cacheOver = QPixmap();

		_scroll->show();
		_mainMenuToggle->show();
		if (_forwardCancel) _forwardCancel->show();
		_filter->show();
		updateLockUnlockVisibility();
		_a_show.stop();

		onFilterUpdate();
		if (App::wnd()) App::wnd()->setInnerFocus();

		if (App::app()) App::app()->mtpUnpause();
	} else {
		a_coordUnder.update(dt, Window::SlideAnimation::transition());
		a_coordOver.update(dt, Window::SlideAnimation::transition());
		a_progress.update(dt, Window::SlideAnimation::transition());
	}
	if (timer) update();
}

void DialogsWidget::onCancel() {
	if (!onCancelSearch() || (!_searchInPeer && !App::main()->selectingPeer())) {
		emit cancelled();
	}
}

void DialogsWidget::notify_userIsContactChanged(UserData *user, bool fromThisApp) {
	if (fromThisApp) {
		_filter->setText(QString());
		_filter->updatePlaceholder();
		onFilterUpdate();
	}
	_inner->notify_userIsContactChanged(user, fromThisApp);
}

void DialogsWidget::notify_historyMuteUpdated(History *history) {
	_inner->notify_historyMuteUpdated(history);
}

void DialogsWidget::unreadCountsReceived(const QVector<MTPDialog> &dialogs) {
}

void DialogsWidget::dialogsReceived(const MTPmessages_Dialogs &dialogs, mtpRequestId req) {
	if (_dialogsRequest != req) return;

	const QVector<MTPDialog> *dialogsList = 0;
	const QVector<MTPMessage> *messagesList = 0;
	switch (dialogs.type()) {
	case mtpc_messages_dialogs: {
		const auto &data(dialogs.c_messages_dialogs());
		App::feedUsers(data.vusers);
		App::feedChats(data.vchats);
		messagesList = &data.vmessages.c_vector().v;
		dialogsList = &data.vdialogs.c_vector().v;
		_dialogsFull = true;
	} break;
	case mtpc_messages_dialogsSlice: {
		const auto &data(dialogs.c_messages_dialogsSlice());
		App::feedUsers(data.vusers);
		App::feedChats(data.vchats);
		messagesList = &data.vmessages.c_vector().v;
		dialogsList = &data.vdialogs.c_vector().v;
	} break;
	}

	if (!_contactsRequest) {
		_contactsRequest = MTP::send(MTPcontacts_GetContacts(MTP_string("")), rpcDone(&DialogsWidget::contactsReceived), rpcFail(&DialogsWidget::contactsFailed));
	}

	if (messagesList) {
		App::feedMsgs(*messagesList, NewMessageLast);
	}
	if (dialogsList) {
		unreadCountsReceived(*dialogsList);
		_inner->dialogsReceived(*dialogsList);
		onListScroll();

		TimeId lastDate = 0;
		PeerId lastPeer = 0;
		MsgId lastMsgId = 0;
		for (int i = dialogsList->size(); i > 0;) {
			auto &dialog = dialogsList->at(--i);
			if (dialog.type() != mtpc_dialog) {
				continue;
			}

			if (auto peer = peerFromMTP(dialog.c_dialog().vpeer)) {
				if (!lastPeer) lastPeer = peer;
				if (auto msgId = dialog.c_dialog().vtop_message.v) {
					if (!lastMsgId) lastMsgId = msgId;
					for (int j = messagesList->size(); j > 0;) {
						auto &message = messagesList->at(--j);
						if (idFromMessage(message) == msgId && peerFromMessage(message) == peer) {
							if (auto date = dateFromMessage(message)) {
								lastDate = date;
							}
							break;
						}
					}
					if (lastDate) break;
				}
			}
		}
		if (lastDate) {
			_dialogsOffsetDate = lastDate;
			_dialogsOffsetId = lastMsgId;
			_dialogsOffsetPeer = App::peer(lastPeer);
		} else {
			_dialogsFull = true;
		}
	} else {
		_dialogsFull = true;
	}

	_dialogsRequest = 0;
	loadDialogs();
}

bool DialogsWidget::dialogsFailed(const RPCError &error, mtpRequestId req) {
	if (MTP::isDefaultHandledError(error)) return false;

	LOG(("RPC Error: %1 %2: %3").arg(error.code()).arg(error.type()).arg(error.description()));
	if (_dialogsRequest == req) {
		_dialogsRequest = 0;
	}
	return true;
}

bool DialogsWidget::onSearchMessages(bool searchCache) {
	QString q = _filter->getLastText().trimmed();
	if (q.isEmpty()) {
		if (_searchRequest) {
			MTP::cancel(_searchRequest);
			_searchRequest = 0;
		}
		if (_peopleRequest) {
			MTP::cancel(_peopleRequest);
			_peopleRequest = 0;
		}
		return true;
	}
	if (searchCache) {
		SearchCache::const_iterator i = _searchCache.constFind(q);
		if (i != _searchCache.cend()) {
			_searchQuery = q;
			_searchFull = _searchFullMigrated = false;
			if (_searchRequest) {
				MTP::cancel(_searchRequest);
				_searchRequest = 0;
			}
			searchReceived(_searchInPeer ? DialogsSearchPeerFromStart : DialogsSearchFromStart, i.value(), 0);
			return true;
		}
	} else if (_searchQuery != q) {
		_searchQuery = q;
		_searchFull = _searchFullMigrated = false;
		if (_searchRequest) {
			MTP::cancel(_searchRequest);
		}
		if (_searchInPeer) {
			MTPmessages_Search::Flags flags = 0;
			_searchRequest = MTP::send(MTPmessages_Search(MTP_flags(flags), _searchInPeer->input, MTP_string(_searchQuery), MTP_inputMessagesFilterEmpty(), MTP_int(0), MTP_int(0), MTP_int(0), MTP_int(0), MTP_int(SearchPerPage)), rpcDone(&DialogsWidget::searchReceived, DialogsSearchPeerFromStart), rpcFail(&DialogsWidget::searchFailed, DialogsSearchPeerFromStart));
		} else {
			_searchRequest = MTP::send(MTPmessages_SearchGlobal(MTP_string(_searchQuery), MTP_int(0), MTP_inputPeerEmpty(), MTP_int(0), MTP_int(SearchPerPage)), rpcDone(&DialogsWidget::searchReceived, DialogsSearchFromStart), rpcFail(&DialogsWidget::searchFailed, DialogsSearchFromStart));
		}
		_searchQueries.insert(_searchRequest, _searchQuery);
	}
	if (!_searchInPeer && q.size() >= MinUsernameLength) {
		if (searchCache) {
			auto i = _peopleCache.constFind(q);
			if (i != _peopleCache.cend()) {
				_peopleQuery = q;
				_peopleRequest = 0;
				peopleReceived(i.value(), 0);
				return true;
			}
		} else if (_peopleQuery != q) {
			_peopleQuery = q;
			_peopleFull = false;
			_peopleRequest = MTP::send(MTPcontacts_Search(MTP_string(_peopleQuery), MTP_int(SearchPeopleLimit)), rpcDone(&DialogsWidget::peopleReceived), rpcFail(&DialogsWidget::peopleFailed));
			_peopleQueries.insert(_peopleRequest, _peopleQuery);
		}
	}
	return false;
}

void DialogsWidget::onNeedSearchMessages() {
	if (!onSearchMessages(true)) {
		_searchTimer.start(AutoSearchTimeout);
	}
}

void DialogsWidget::onChooseByDrag() {
	_inner->choosePeer();
}

void DialogsWidget::showMainMenu() {
	App::wnd()->showMainMenu();
}

void DialogsWidget::searchMessages(const QString &query, PeerData *inPeer) {
	if ((_filter->getLastText() != query) || (inPeer && inPeer != _searchInPeer && inPeer->migrateTo() != _searchInPeer)) {
		if (inPeer) {
			onCancelSearch();
			setSearchInPeer(inPeer);
		}
		_filter->setText(query);
		_filter->updatePlaceholder();
		onFilterUpdate(true);
		_searchTimer.stop();
		onSearchMessages();

		_inner->saveRecentHashtags(query);
	}
}

void DialogsWidget::onSearchMore() {
	if (!_searchRequest) {
		if (!_searchFull) {
			int32 offsetDate = _inner->lastSearchDate();
			PeerData *offsetPeer = _inner->lastSearchPeer();
			MsgId offsetId = _inner->lastSearchId();
			if (_searchInPeer) {
				MTPmessages_Search::Flags flags = 0;
				_searchRequest = MTP::send(MTPmessages_Search(MTP_flags(flags), _searchInPeer->input, MTP_string(_searchQuery), MTP_inputMessagesFilterEmpty(), MTP_int(0), MTP_int(0), MTP_int(0), MTP_int(offsetId), MTP_int(SearchPerPage)), rpcDone(&DialogsWidget::searchReceived, offsetId ? DialogsSearchPeerFromOffset : DialogsSearchPeerFromStart), rpcFail(&DialogsWidget::searchFailed, offsetId ? DialogsSearchPeerFromOffset : DialogsSearchPeerFromStart));
			} else {
				_searchRequest = MTP::send(MTPmessages_SearchGlobal(MTP_string(_searchQuery), MTP_int(offsetDate), offsetPeer ? offsetPeer->input : MTP_inputPeerEmpty(), MTP_int(offsetId), MTP_int(SearchPerPage)), rpcDone(&DialogsWidget::searchReceived, offsetId ? DialogsSearchFromOffset : DialogsSearchFromStart), rpcFail(&DialogsWidget::searchFailed, offsetId ? DialogsSearchFromOffset : DialogsSearchFromStart));
			}
			if (!offsetId) {
				_searchQueries.insert(_searchRequest, _searchQuery);
			}
		} else if (_searchInMigrated && !_searchFullMigrated) {
			MsgId offsetMigratedId = _inner->lastSearchMigratedId();
			MTPmessages_Search::Flags flags = 0;
			_searchRequest = MTP::send(MTPmessages_Search(MTP_flags(flags), _searchInMigrated->input, MTP_string(_searchQuery), MTP_inputMessagesFilterEmpty(), MTP_int(0), MTP_int(0), MTP_int(0), MTP_int(offsetMigratedId), MTP_int(SearchPerPage)), rpcDone(&DialogsWidget::searchReceived, offsetMigratedId ? DialogsSearchMigratedFromOffset : DialogsSearchMigratedFromStart), rpcFail(&DialogsWidget::searchFailed, offsetMigratedId ? DialogsSearchMigratedFromOffset : DialogsSearchMigratedFromStart));
		}
	}
}

void DialogsWidget::loadDialogs() {
	if (_dialogsRequest) return;
	if (_dialogsFull) {
		_inner->addAllSavedPeers();
		cSetDialogsReceived(true);
		return;
	}

	int32 loadCount = _dialogsOffsetDate ? DialogsPerPage : DialogsFirstLoad;
	_dialogsRequest = MTP::send(MTPmessages_GetDialogs(MTP_int(_dialogsOffsetDate), MTP_int(_dialogsOffsetId), _dialogsOffsetPeer ? _dialogsOffsetPeer->input : MTP_inputPeerEmpty(), MTP_int(loadCount)), rpcDone(&DialogsWidget::dialogsReceived), rpcFail(&DialogsWidget::dialogsFailed));
}

void DialogsWidget::contactsReceived(const MTPcontacts_Contacts &contacts) {
	cSetContactsReceived(true);
	if (contacts.type() == mtpc_contacts_contacts) {
		const auto &d(contacts.c_contacts_contacts());
		App::feedUsers(d.vusers);
		_inner->contactsReceived(d.vcontacts.c_vector().v);
	}
	if (App::main()) App::main()->contactsReceived();
}

bool DialogsWidget::contactsFailed(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	return true;
}

void DialogsWidget::searchReceived(DialogsSearchRequestType type, const MTPmessages_Messages &result, mtpRequestId req) {
	if (_inner->state() == DialogsInner::FilteredState || _inner->state() == DialogsInner::SearchedState) {
		if (type == DialogsSearchFromStart || type == DialogsSearchPeerFromStart) {
			SearchQueries::iterator i = _searchQueries.find(req);
			if (i != _searchQueries.cend()) {
				_searchCache[i.value()] = result;
				_searchQueries.erase(i);
			}
		}
	}

	if (_searchRequest == req) {
		switch (result.type()) {
		case mtpc_messages_messages: {
			auto &d(result.c_messages_messages());
			App::feedUsers(d.vusers);
			App::feedChats(d.vchats);
			auto &msgs(d.vmessages.c_vector().v);
			if (!_inner->searchReceived(msgs, type, msgs.size())) {
				if (type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset) {
					_searchFullMigrated = true;
				} else {
					_searchFull = true;
				}
			}
		} break;

		case mtpc_messages_messagesSlice: {
			auto &d(result.c_messages_messagesSlice());
			App::feedUsers(d.vusers);
			App::feedChats(d.vchats);
			auto &msgs(d.vmessages.c_vector().v);
			if (!_inner->searchReceived(msgs, type, d.vcount.v)) {
				if (type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset) {
					_searchFullMigrated = true;
				} else {
					_searchFull = true;
				}
			}
		} break;

		case mtpc_messages_channelMessages: {
			auto &d(result.c_messages_channelMessages());
			if (_searchInPeer && _searchInPeer->isChannel()) {
				_searchInPeer->asChannel()->ptsReceived(d.vpts.v);
			} else {
				LOG(("API Error: received messages.channelMessages when no channel was passed! (DialogsWidget::searchReceived)"));
			}
			App::feedUsers(d.vusers);
			App::feedChats(d.vchats);
			auto &msgs(d.vmessages.c_vector().v);
			if (!_inner->searchReceived(msgs, type, d.vcount.v)) {
				if (type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset) {
					_searchFullMigrated = true;
				} else {
					_searchFull = true;
				}
			}
		} break;
		}

		_searchRequest = 0;
		onListScroll();
		update();
	}
}

void DialogsWidget::peopleReceived(const MTPcontacts_Found &result, mtpRequestId req) {
	auto q = _peopleQuery;
	if (_inner->state() == DialogsInner::FilteredState || _inner->state() == DialogsInner::SearchedState) {
		auto i = _peopleQueries.find(req);
		if (i != _peopleQueries.cend()) {
			q = i.value();
			_peopleCache[q] = result;
			_peopleQueries.erase(i);
		}
	}
	if (_peopleRequest == req) {
		switch (result.type()) {
		case mtpc_contacts_found: {
			auto &d = result.c_contacts_found();
			App::feedUsers(d.vusers);
			App::feedChats(d.vchats);
			_inner->peopleReceived(q, d.vresults.c_vector().v);
		} break;
		}

		_peopleRequest = 0;
		onListScroll();
	}
}

bool DialogsWidget::searchFailed(DialogsSearchRequestType type, const RPCError &error, mtpRequestId req) {
	if (MTP::isDefaultHandledError(error)) return false;

	if (_searchRequest == req) {
		_searchRequest = 0;
		if (type == DialogsSearchMigratedFromStart || type == DialogsSearchMigratedFromOffset) {
			_searchFullMigrated = true;
		} else {
			_searchFull = true;
		}
	}
	return true;
}

bool DialogsWidget::peopleFailed(const RPCError &error, mtpRequestId req) {
	if (MTP::isDefaultHandledError(error)) return false;

	if (_peopleRequest == req) {
		_peopleRequest = 0;
		_peopleFull = true;
	}
	return true;
}

void DialogsWidget::dragEnterEvent(QDragEnterEvent *e) {
	if (App::main()->selectingPeer()) return;

	_dragInScroll = false;
	_dragForward = e->mimeData()->hasFormat(qsl("application/x-td-forward-selected"));
	if (!_dragForward) _dragForward = e->mimeData()->hasFormat(qsl("application/x-td-forward-pressed-link"));
	if (!_dragForward) _dragForward = e->mimeData()->hasFormat(qsl("application/x-td-forward-pressed"));
	if (_dragForward && Adaptive::OneColumn()) _dragForward = false;
	if (_dragForward) {
		e->setDropAction(Qt::CopyAction);
		e->accept();
		updateDragInScroll(_scroll->geometry().contains(e->pos()));
	} else if (App::main() && App::main()->getDragState(e->mimeData()) != DragStateNone) {
		e->setDropAction(Qt::CopyAction);
		e->accept();
	}
	_chooseByDragTimer.stop();
}

void DialogsWidget::dragMoveEvent(QDragMoveEvent *e) {
	if (_scroll->geometry().contains(e->pos())) {
		if (_dragForward) {
			updateDragInScroll(true);
		} else {
			_chooseByDragTimer.start(ChoosePeerByDragTimeout);
		}
		PeerData *p = _inner->updateFromParentDrag(mapToGlobal(e->pos()));
		if (p) {
			e->setDropAction(Qt::CopyAction);
		} else {
			e->setDropAction(Qt::IgnoreAction);
		}
	} else {
		if (_dragForward) updateDragInScroll(false);
		_inner->leaveEvent(0);
		e->setDropAction(Qt::IgnoreAction);
	}
	e->accept();
}

void DialogsWidget::dragLeaveEvent(QDragLeaveEvent *e) {
	if (_dragForward) {
		updateDragInScroll(false);
	} else {
		_chooseByDragTimer.stop();
	}
	_inner->leaveEvent(0);
	e->accept();
}

void DialogsWidget::updateDragInScroll(bool inScroll) {
	if (_dragInScroll != inScroll) {
		_dragInScroll = inScroll;
		if (_dragInScroll) {
			App::main()->forwardLayer(1);
		} else {
			App::main()->dialogsCancelled();
		}
	}
}

void DialogsWidget::dropEvent(QDropEvent *e) {
	_chooseByDragTimer.stop();
	if (_scroll->geometry().contains(e->pos())) {
		PeerData *p = _inner->updateFromParentDrag(mapToGlobal(e->pos()));
		if (p) {
			e->acceptProposedAction();
			App::main()->onFilesOrForwardDrop(p->id, e->mimeData());
		}
	}
}

void DialogsWidget::onListScroll() {
//	if (!App::self()) return;

	_inner->loadPeerPhotos(_scroll->scrollTop());
	if (_inner->state() == DialogsInner::SearchedState || (_inner->state() == DialogsInner::FilteredState && _searchInMigrated && _searchFull && !_searchFullMigrated)) {
		if (_scroll->scrollTop() > (_inner->searchList().size() + _inner->filteredList().size() + _inner->peopleList().size()) * st::dialogsRowHeight - PreloadHeightsCount * _scroll->height()) {
			onSearchMore();
		}
	} else if (_scroll->scrollTop() > _inner->dialogsList()->size() * st::dialogsRowHeight - PreloadHeightsCount * _scroll->height()) {
		loadDialogs();
	}
}

void DialogsWidget::onFilterUpdate(bool force) {
	if (_a_show.animating() && !force) return;

	QString filterText = _filter->getLastText();
	_inner->onFilterUpdate(filterText, force);
	if (filterText.isEmpty()) {
		_searchCache.clear();
		_searchQueries.clear();
		_searchQuery = QString();
		_cancelSearch->hide();
	} else if (_cancelSearch->isHidden()) {
		_cancelSearch->show();
	}
	if (filterText.size() < MinUsernameLength) {
		_peopleCache.clear();
		_peopleQueries.clear();
		_peopleQuery = QString();
	}
}

void DialogsWidget::searchInPeer(PeerData *peer) {
	onCancelSearch();
	setSearchInPeer(peer);
	onFilterUpdate(true);
}

void DialogsWidget::setSearchInPeer(PeerData *peer) {
	auto newSearchInPeer = peer ? (peer->migrateTo() ? peer->migrateTo() : peer) : nullptr;
	_searchInMigrated = newSearchInPeer ? newSearchInPeer->migrateFrom() : nullptr;
	if (newSearchInPeer != _searchInPeer) {
		_searchInPeer = newSearchInPeer;
		App::main()->searchInPeerChanged().notify(_searchInPeer, true);
	}
	_inner->searchInPeer(_searchInPeer);
}

void DialogsWidget::onFilterCursorMoved(int from, int to) {
	if (to < 0) to = _filter->cursorPosition();
	QString t = _filter->getLastText();
	QStringRef r;
	for (int start = to; start > 0;) {
		--start;
		if (t.size() <= start) break;
		if (t.at(start) == '#') {
			r = t.midRef(start, to - start);
			break;
		}
		if (!t.at(start).isLetterOrNumber() && t.at(start) != '_') break;
	}
	_inner->onHashtagFilterUpdate(r);
}

void DialogsWidget::onCompleteHashtag(QString tag) {
	QString t = _filter->getLastText(), r;
	int cur = _filter->cursorPosition();
	for (int start = cur; start > 0;) {
		--start;
		if (t.size() <= start) break;
		if (t.at(start) == '#') {
			if (cur == start + 1 || t.midRef(start + 1, cur - start - 1) == tag.midRef(0, cur - start - 1)) {
				for (; cur < t.size() && cur - start - 1 < tag.size(); ++cur) {
					if (t.at(cur) != tag.at(cur - start - 1)) break;
				}
				if (cur - start - 1 == tag.size() && cur < t.size() && t.at(cur) == ' ') ++cur;
				r = t.mid(0, start + 1) + tag + ' ' + t.mid(cur);
				_filter->setText(r);
				_filter->setCursorPosition(start + 1 + tag.size() + 1);
				onFilterUpdate(true);
				return;
			}
			break;
		}
		if (!t.at(start).isLetterOrNumber() && t.at(start) != '_') break;
	}
	_filter->setText(t.mid(0, cur) + '#' + tag + ' ' + t.mid(cur));
	_filter->setCursorPosition(cur + 1 + tag.size() + 1);
	onFilterUpdate(true);
}

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

void DialogsWidget::updateLockUnlockVisibility() {
	if (!_a_show.animating()) {
		_lockUnlock->setVisible(Global::LocalPasscode());
	}
	updateControlsGeometry();
}

void DialogsWidget::updateControlsGeometry() {
	auto filterAreaTop = 0;
	if (_forwardCancel) {
		_forwardCancel->moveToLeft(0, filterAreaTop);
		filterAreaTop += st::dialogsForwardHeight;
	}
	auto filterLeft = st::dialogsFilterPadding.x() + _mainMenuToggle->width() + st::dialogsFilterPadding.x();
	auto filterRight = (Global::LocalPasscode() ? (st::dialogsFilterPadding.x() + _lockUnlock->width()) : st::dialogsFilterSkip) + st::dialogsFilterPadding.x();
	auto filterWidth = width() - filterLeft - filterRight;
	auto filterAreaHeight = st::dialogsFilterPadding.y() + _mainMenuToggle->height() + st::dialogsFilterPadding.y();
	auto filterTop = filterAreaTop + (filterAreaHeight - _filter->height()) / 2;
	_filter->setGeometryToLeft(filterLeft, filterTop, filterWidth, _filter->height());
	_mainMenuToggle->moveToLeft(st::dialogsFilterPadding.x(), filterAreaTop + st::dialogsFilterPadding.y());
	_lockUnlock->moveToRight(st::dialogsFilterPadding.x(), filterAreaTop + st::dialogsFilterPadding.y());
	_cancelSearch->moveToLeft(filterLeft + filterWidth - _cancelSearch->width(), _filter->y());

	auto scrollTop = filterAreaTop + filterAreaHeight;
	auto addToScroll = App::main() ? App::main()->contentScrollAddToY() : 0;
	auto newScrollTop = _scroll->scrollTop() + addToScroll;
	auto scrollHeight = height() - scrollTop;
	if (_updateTelegram) {
		auto updateHeight = _updateTelegram->height();
		_updateTelegram->setGeometry(0, height() - updateHeight, width(), updateHeight);
		scrollHeight -= updateHeight;
	} else {
		scrollHeight -= st::dialogsPadding.y();
	}
	_scroll->setGeometry(0, scrollTop, width(), scrollHeight);
	if (addToScroll) {
		_scroll->scrollToY(newScrollTop);
	} else {
		onListScroll();
	}
}

void DialogsWidget::updateForwardBar() {
	auto selecting = App::main()->selectingPeer();
	auto oneColumnSelecting = (Adaptive::OneColumn() && selecting);
	if (!oneColumnSelecting == !_forwardCancel) {
		return;
	}
	if (oneColumnSelecting) {
		_forwardCancel.create(this, st::dialogsForwardCancel);
		_forwardCancel->setClickedCallback([] { Global::RefPeerChooseCancel().notify(true); });
		if (!_a_show.animating()) _forwardCancel->show();
	} else {
		_forwardCancel.destroyDelayed();
	}
	updateControlsGeometry();
	update();
}

void DialogsWidget::keyPressEvent(QKeyEvent *e) {
	if (e->key() == Qt::Key_Escape) {
		e->ignore();
	} else if (e->key() == Qt::Key_Return || e->key() == Qt::Key_Enter) {
		if (!_inner->choosePeer()) {
			if (_inner->state() == DialogsInner::DefaultState || _inner->state() == DialogsInner::SearchedState || (_inner->state() == DialogsInner::FilteredState && _inner->hasFilteredResults())) {
				_inner->selectSkip(1);
				_inner->choosePeer();
			} else {
				onSearchMessages();
			}
		}
	} else if (e->key() == Qt::Key_Down) {
		_inner->setMouseSel(false);
		_inner->selectSkip(1);
	} else if (e->key() == Qt::Key_Up) {
		_inner->setMouseSel(false);
		_inner->selectSkip(-1);
	} else if (e->key() == Qt::Key_PageDown) {
		_inner->setMouseSel(false);
		_inner->selectSkipPage(_scroll->height(), 1);
	} else if (e->key() == Qt::Key_PageUp) {
		_inner->setMouseSel(false);
		_inner->selectSkipPage(_scroll->height(), -1);
	} else {
		e->ignore();
	}
}

void DialogsWidget::paintEvent(QPaintEvent *e) {
	if (App::wnd() && App::wnd()->contentOverlapped(this, e)) return;

	Painter p(this);
	QRect r(e->rect());
	if (r != rect()) {
		p.setClipRect(r);
	}
	if (_a_show.animating()) {
		int retina = cIntRetinaFactor();
		if (a_coordOver.current() > 0) {
			p.drawPixmap(QRect(0, 0, a_coordOver.current(), _cacheUnder.height() / retina), _cacheUnder, QRect(-a_coordUnder.current() * retina, 0, a_coordOver.current() * retina, _cacheUnder.height()));
			p.setOpacity(a_progress.current());
			p.fillRect(0, 0, a_coordOver.current(), _cacheUnder.height() / retina, st::slideFadeOutBg);
			p.setOpacity(1);
		}
		p.drawPixmap(QRect(a_coordOver.current(), 0, _cacheOver.width() / retina, _cacheOver.height() / retina), _cacheOver, QRect(0, 0, _cacheOver.width(), _cacheOver.height()));
		p.setOpacity(a_progress.current());
		st::slideShadow.fill(p, QRect(a_coordOver.current() - st::slideShadow.width(), 0, st::slideShadow.width(), _cacheOver.height() / retina));
		return;
	}
	auto aboveTop = 0;
	if (_forwardCancel) {
		p.fillRect(0, aboveTop, width(), st::dialogsForwardHeight, st::dialogsForwardBg);
		p.setPen(st::dialogsForwardFg);
		p.setFont(st::dialogsForwardFont);
		p.drawTextLeft(st::dialogsForwardTextLeft, st::dialogsForwardTextTop, width(), lang(lng_forward_choose));
		aboveTop += st::dialogsForwardHeight;
	}
	auto above = QRect(0, aboveTop, width(), _scroll->y());
	if (above.intersects(r)) {
		p.fillRect(above.intersected(r), st::dialogsBg);
	}
	auto below = QRect(0, _scroll->y() + qMin(_scroll->height(), _inner->height()), width(), height());
	if (below.intersects(r)) {
		p.fillRect(below.intersected(r), st::dialogsBg);
	}
}

void DialogsWidget::destroyData() {
	_inner->destroyData();
}

void DialogsWidget::peerBefore(const PeerData *inPeer, MsgId inMsg, PeerData *&outPeer, MsgId &outMsg) const {
	return _inner->peerBefore(inPeer, inMsg, outPeer, outMsg);
}

void DialogsWidget::peerAfter(const PeerData *inPeer, MsgId inMsg, PeerData *&outPeer, MsgId &outMsg) const {
	return _inner->peerAfter(inPeer, inMsg, outPeer, outMsg);
}

void DialogsWidget::scrollToPeer(const PeerId &peer, MsgId msgId) {
	_inner->scrollToPeer(peer, msgId);
}

void DialogsWidget::removeDialog(History *history) {
	_inner->removeDialog(history);
	onFilterUpdate();
}

Dialogs::IndexedList *DialogsWidget::contactsList() {
	return _inner->contactsList();
}

Dialogs::IndexedList *DialogsWidget::dialogsList() {
	return _inner->dialogsList();
}

bool DialogsWidget::onCancelSearch() {
	bool clearing = !_filter->getLastText().isEmpty();
	if (_searchRequest) {
		MTP::cancel(_searchRequest);
		_searchRequest = 0;
	}
	if (_searchInPeer && !clearing) {
		if (Adaptive::OneColumn()) {
			Ui::showPeerHistory(_searchInPeer, ShowAtUnreadMsgId);
		}
		setSearchInPeer(nullptr);
		clearing = true;
	}
	_inner->clearFilter();
	_filter->clear();
	_filter->updatePlaceholder();
	onFilterUpdate();
	return clearing;
}

void DialogsWidget::onCancelSearchInPeer() {
	if (_searchRequest) {
		MTP::cancel(_searchRequest);
		_searchRequest = 0;
	}
	if (_searchInPeer) {
		if (Adaptive::OneColumn() && !App::main()->selectingPeer()) {
			Ui::showPeerHistory(_searchInPeer, ShowAtUnreadMsgId);
		}
		setSearchInPeer(nullptr);
	}
	_inner->clearFilter();
	_filter->clear();
	_filter->updatePlaceholder();
	onFilterUpdate();
	if (!Adaptive::OneColumn() && !App::main()->selectingPeer()) {
		emit cancelled();
	}
}

void DialogsWidget::onDialogMoved(int movedFrom, int movedTo) {
	int32 st = _scroll->scrollTop();
	if (st > movedTo && st < movedFrom) {
		_scroll->scrollToY(st + st::dialogsRowHeight);
	}
}