libreoffice-online/loolwsd/TileCache.hpp
Tor Lillqvist 0092414470 Handle LOK_CALLBACK_DOCUMENT_SIZE_CHANGED callbacks more cleverly
When a child process sends a documentsizechanged: message to the parent, to be
forwarded to the client, parse it and update a cached status of the doucment,
if available, and send an updated status: message to the client instead.

Note that clients should not rely on getting only status: messages and never
documentsizechanged: messages, though; the cache might be cleaned at any time
even while the server is running. If there is no cached status of the document
to update and re-use, we have to forward the documentsizechanged: message as
such to the client.
2015-05-28 12:53:14 +03:00

44 lines
1.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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_TILECACHE_HPP
#define INCLUDED_TILECACHE_HPP
#include <fstream>
#include <memory>
#include <string>
#include <Poco/Timestamp.h>
class TileCache
{
public:
TileCache(const std::string& docURL);
std::unique_ptr<std::fstream> lookupTile(int part, int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight);
void saveTile(int part, int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight, const char *data, size_t size);
std::string getStatus();
// The parameter is a status: message
void saveStatus(const std::string& status);
// The parameter is a documentsizechanged: message
bool updateSizeInStatus(const std::string& status, std::string& newStatus);
private:
std::string cacheDirName();
std::string cacheFileName(int part, int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight);
Poco::Timestamp getLastModified();
const std::string& _docURL;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */