libreoffice-online/loolwsd/ChildSession.hpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#ifndef INCLUDED_CHILDSESSION_HPP
#define INCLUDED_CHILDSESSION_HPP

#include <mutex>

#include <Poco/Thread.h>
#include <Poco/NotificationQueue.h>

#include "Common.hpp"
#include "LOOLSession.hpp"
#include "LibreOfficeKit.hpp"

class CallbackWorker;
typedef std::function<std::shared_ptr<lok::Document>(const std::string&, const std::string&, const std::string&, const std::string&, bool)> OnLoadCallback;
typedef std::function<void(const std::string&)> OnUnloadCallback;

class ChildSession final : public LOOLSession
{
public:
    /// Create a new ChildSession
    /// ws The socket between master and kit (jailed).
    /// loKit The LOKit instance.
    /// loKitDocument The instance to an existing document (when opening
    ///                 a new view) or nullptr (when first view).
    /// jailId The JailID of the jail root directory,
    //         used by downloadas to construct jailed path.
    ChildSession(const std::string& id,
                 std::shared_ptr<Poco::Net::WebSocket> ws,
                 const std::string& jailId,
                 OnLoadCallback onLoad,
                 OnUnloadCallback onUnload);
    virtual ~ChildSession();

    bool getStatus(const char *buffer, int length);
    bool getPartPageRectangles(const char *buffer, int length);
    virtual void disconnect() override;

    int getViewId() const  { return _viewId; }

    const std::string& getDocType() const { return _docType; }

    LibreOfficeKitDocument *getLoKitDocument() const { return (_loKitDocument ? _loKitDocument->get() : nullptr); }

    void loKitCallback(const int nType, const char* pPayload);

    static std::unique_lock<std::recursive_mutex> getLock() { return std::unique_lock<std::recursive_mutex>(Mutex); }

    void setDocState(const int type, const std::string& payload) { _lastDocStates[type] = payload; }

 protected:
    bool loadDocument(const char *buffer, int length, Poco::StringTokenizer& tokens);

    bool sendFontRendering(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool getCommandValues(const char *buffer, int length, Poco::StringTokenizer& tokens);

    bool clientZoom(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool clientVisibleArea(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool downloadAs(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool getChildId();
    bool getTextSelection(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool paste(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool insertFile(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool keyEvent(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool mouseEvent(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool unoCommand(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool selectText(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool selectGraphic(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool resetSelection(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool saveAs(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool setClientPart(const char *buffer, int length, Poco::StringTokenizer& tokens);
    bool setPage(const char *buffer, int length, Poco::StringTokenizer& tokens);

private:

    virtual bool _handleInput(const char *buffer, int length) override;

private:
    std::shared_ptr<lok::Document> _loKitDocument;
    std::string _docType;
    const bool _multiView;
    const std::string _jailId;
    /// View ID, returned by createView() or 0 by default.
    int _viewId;
    std::map<int, std::string> _lastDocStates;
    OnLoadCallback _onLoad;
    OnUnloadCallback _onUnload;

    std::unique_ptr<CallbackWorker> _callbackWorker;
    Poco::Thread _callbackThread;
    Poco::NotificationQueue _callbackQueue;

    /// Synchronize _loKitDocument acess.
    /// This should be owned by Document.
    static std::recursive_mutex Mutex;
};

#endif

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