142 lines
4.1 KiB
C++
142 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "config.h"
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#include <fstream>
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#include <iostream>
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#include <memory>
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#include <Poco/File.h>
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#include <Poco/Path.h>
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#include <Poco/SHA1Engine.h>
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#include "TileCache.hpp"
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TileCache::TileCache(const std::string& docURL) :
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_docURL(docURL)
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{
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Poco::File dir(cacheDirName());
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// TODO: get last modified time of docURL if it *is* some kind of URL and not a local file
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if (dir.exists() && dir.isDirectory() && Poco::File(_docURL).exists() && Poco::File(_docURL).isFile())
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{
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if (getLastModified() != Poco::File(_docURL).getLastModified())
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{
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dir.remove(true);
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}
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}
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}
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std::unique_ptr<std::fstream> TileCache::lookupTile(int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight)
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{
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std::string dirName = cacheDirName();
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if (!Poco::File(dirName).exists() || !Poco::File(dirName).isDirectory())
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return nullptr;
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std::string fileName = dirName + "/" + cacheFileName(width, height, tilePosX, tilePosY, tileWidth, tileHeight);
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std::unique_ptr<std::fstream> result(new std::fstream(fileName, std::ios::in));
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return result;
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}
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void TileCache::saveTile(int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight, const char *data, size_t size)
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{
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std::string dirName = cacheDirName();
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Poco::File(dirName).createDirectories();
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std::string fileName = dirName + "/" + cacheFileName(width, height, tilePosX, tilePosY, tileWidth, tileHeight);
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std::fstream outStream(fileName, std::ios::out);
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outStream.write(data, size);
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outStream.close();
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std::fstream modTimeFile(dirName + "/modtime.txt", std::ios::out);
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modTimeFile << Poco::File(_docURL).getLastModified().raw() << std::endl;
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modTimeFile.close();
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}
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std::string TileCache::getStatus()
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{
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std::string dirName = cacheDirName();
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if (!Poco::File(dirName).exists() || !Poco::File(dirName).isDirectory())
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return "";
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std::string fileName = dirName + "/status.txt";
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std::fstream statusStream(fileName, std::ios::in);
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if (!statusStream.is_open())
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return "";
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std::vector<char> result;
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statusStream.seekg(0, std::ios_base::end);
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std::streamsize size = statusStream.tellg();
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result.resize(size);
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statusStream.seekg(0, std::ios_base::beg);
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statusStream.read(result.data(), size);
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statusStream.close();
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if (result[result.size()-1] == '\n')
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result.resize(result.size() - 1);
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return std::string(result.data(), result.size());
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}
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void TileCache::saveStatus(const std::string& status)
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{
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std::string dirName = cacheDirName();
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Poco::File(dirName).createDirectories();
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std::string fileName = dirName + "/status.txt";
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std::fstream statusStream(fileName, std::ios::out);
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if (!statusStream.is_open())
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return;
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statusStream << status << std::endl;
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statusStream.close();
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}
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std::string TileCache::cacheDirName()
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{
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Poco::SHA1Engine digestEngine;
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digestEngine.update(_docURL.c_str(), _docURL.size());
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return (LOOLWSD_CACHEDIR "/" +
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Poco::DigestEngine::digestToHex(digestEngine.digest()).insert(3, "/").insert(2, "/").insert(1, "/"));
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}
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std::string TileCache::cacheFileName(int width, int height, int tilePosX, int tilePosY, int tileWidth, int tileHeight)
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{
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return (std::to_string(width) + "x" + std::to_string(height) + "." +
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std::to_string(tilePosX) + "," + std::to_string(tilePosY) + "." +
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std::to_string(tileWidth) + "x" + std::to_string(tileHeight) + ".png");
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}
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Poco::Timestamp TileCache::getLastModified()
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{
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std::fstream modTimeFile(cacheDirName() + "/modtime.txt", std::ios::in);
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if (!modTimeFile.is_open())
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return 0;
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Poco::Timestamp::TimeVal result;
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modTimeFile >> result;
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modTimeFile.close();
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return result;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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