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Start: Implement Thumbnail Managing Standard

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as specified here: https://specifications.freedesktop.org/thumbnail-spec/0.8.0/

The changes are:
* use MD5 as hashing algorithm
* write thumbnails to ~/.cache/thumbnails/normal
This commit is contained in:
wmayer
2024-11-23 18:43:50 +01:00
committed by Chris Hennes
parent 0a5c5ee101
commit 09772749f2
2 changed files with 20 additions and 11 deletions
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29
src/Mod/Start/App/DisplayedFilesModel.cpp
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@@ -30,6 +30,8 @@
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QStandardPaths>
#include <QUrl>
#endif
#include "DisplayedFilesModel.h"
@@ -93,12 +95,16 @@ std::string getThumbnailsImage()
QString getThumbnailsName()
{
#if defined(Q_OS_LINUX)
return QString::fromLatin1("thumbnails/normal");
#else
return QString::fromLatin1("FreeCADStartThumbnails");
#endif
}
QDir getThumnailsParentDir()
{
return QDir::temp();
return {QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation)};
}
QString getThumbnailsDir()
@@ -116,22 +122,23 @@ void createThumbnailsDir()
}
}
QString getSha1Hash(const std::string& path)
QString getMD5Hash(const std::string& path)
{
QCryptographicHash hash(QCryptographicHash::Sha1);
hash.addData(path.c_str(), static_cast<int>(path.size()));
QByteArray ba1 = hash.result().toHex();
hash.reset();
hash.addData(ba1);
QByteArray ba2 = hash.result().toHex();
return QString::fromLatin1(ba2);
// Use MD5 hash as specified here:
// https://specifications.freedesktop.org/thumbnail-spec/0.8.0/thumbsave.html
QUrl url(QString::fromStdString(path));
url.setScheme(QString::fromLatin1("file"));
QCryptographicHash hash(QCryptographicHash::Md5);
hash.addData(url.toEncoded());
QByteArray ba = hash.result().toHex();
return QString::fromLatin1(ba);
}
QString getUniquePNG(const std::string& path)
{
QDir dir = getThumbnailsDir();
QString sha1 = getSha1Hash(path) + QLatin1String(".png");
return dir.absoluteFilePath(sha1);
QString md5 = getMD5Hash(path) + QLatin1String(".png");
return dir.absoluteFilePath(md5);
}
bool useCachedPNG(const std::string& image, const std::string& project)

2
src/Mod/Start/App/PreCompiled.h
View File

@@ -52,6 +52,8 @@
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QStandardPaths>
#include <QUrl>
#endif // _PreComp_
#endif // START_PRECOMPILED_H