File size: 4,227 Bytes
985c397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | // SPDX-License-Identifier: LGPL-2.1-or-later
/****************************************************************************
* *
* Copyright (c) 2025 The FreeCAD Project Association AISBL *
* *
* This file is part of FreeCAD. *
* *
* FreeCAD is free software: you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 2.1 of the *
* License, or (at your option) any later version. *
* *
* FreeCAD 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with FreeCAD. If not, see *
* <https://www.gnu.org/licenses/>. *
* *
***************************************************************************/
#include <QCryptographicHash>
#include <QDateTime>
#include <QFileInfo>
#include <QString>
#include <QTimeZone>
#include <QUrl>
#include <fmt/format.h>
#include "FileUtilities.h"
#include <Base/TimeInfo.h>
void Start::createThumbnailsDir()
{
if (!thumbnailsParentDir.exists(defaultThumbnailName)) {
thumbnailsParentDir.mkpath(defaultThumbnailName);
}
}
QString Start::getMD5Hash(const QString& path)
{
// Use MD5 hash as specified here:
// https://specifications.freedesktop.org/thumbnail-spec/0.8.0/thumbsave.html
QUrl url(path);
url.setScheme(QStringLiteral("file"));
QCryptographicHash hash(QCryptographicHash::Md5);
hash.addData(url.toEncoded());
const QByteArray ba = hash.result().toHex();
return QString::fromLatin1(ba);
}
QString Start::getPathToCachedThumbnail(const QString& path)
{
const QString md5 = getMD5Hash(path) + QLatin1String(".png");
return thumbnailsDir.absoluteFilePath(md5);
}
bool Start::useCachedThumbnail(const QString& image, const QString& project)
{
const QFileInfo f1(image);
const QFileInfo f2(project);
if (!f1.exists()) {
return false;
}
if (!f2.exists()) {
return false;
}
return f1.lastModified() > f2.lastModified();
}
std::string Start::humanReadableSize(uint64_t bytes)
{
if (bytes == 0) {
return "0 B";
}
// uint64_t can't express numbers higher than the EB range (< 20 EB)
constexpr std::array units {"B", "kB", "MB", "GB", "TB", "PB", "EB"};
constexpr double unitFactor = 1000.0;
const double logBaseFactor = std::log10(unitFactor); // change to constexpr on c++26
const auto unitIndex = static_cast<size_t>(std::log10(bytes) / logBaseFactor);
// unitIndex can't be out of range because uint64_t can't express numbers higher than the EB
// range
const auto unit = units.at(unitIndex);
const double scaledValue = static_cast<double>(bytes) / std::pow(unitFactor, unitIndex);
const bool isByteUnit = unitIndex == 0;
const size_t precision = isByteUnit ? 0 : 1;
return fmt::format("{:.{}f} {}", scaledValue, precision, unit);
}
std::string Start::getLastModifiedAsString(const Base::FileInfo& file)
{
Base::TimeInfo lastModified = file.lastModified();
return QDateTime::fromSecsSinceEpoch(lastModified.getTime_t())
.toTimeZone(QTimeZone::utc())
.toString(Qt::ISODate)
.toStdString();
}
|