added stickers preview

Telegram/SourceFiles/facades.h

@@ -0,0 +1,56 @@
+/*
+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) 2014-2015 John Preston, https://desktop.telegram.org
+*/
+#pragma once
+
+class LayeredWidget;
+
+namespace App {
+
+	void sendBotCommand(const QString &cmd, MsgId replyTo = 0);
+	void insertBotCommand(const QString &cmd);
+	void searchByHashtag(const QString &tag, PeerData *inPeer);
+	void openPeerByName(const QString &username, bool toProfile = false, const QString &startToken = QString());
+	void joinGroupByHash(const QString &hash);
+	void stickersBox(const QString &name);
+	void openLocalUrl(const QString &url);
+	bool forward(const PeerId &peer, ForwardWhatMessages what);
+	void removeDialog(History *history);
+	void showSettings();
+	void showLayer(LayeredWidget *w, bool forceFast = false);
+	void replaceLayer(LayeredWidget *w);
+	void showLayerLast(LayeredWidget *w);
+
+};
+
+namespace Ui { // it doesn't allow me to use UI :(
+
+	void showStickerPreview(DocumentData *sticker);
+	void hideStickerPreview();
+
+};
+
+namespace Notify {
+
+	void userIsBotChanged(UserData *user);
+	void botCommandsChanged(UserData *user);
+	void migrateUpdated(PeerData *peer);
+
+};