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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:critical reason:data-parser
#include "qqmlimportresolver_p.h"
#include <QtCore/qstringlist.h>
#include <QtCore/qstringview.h>
QT_BEGIN_NAMESPACE
enum ImportVersion { FullyVersioned, PartiallyVersioned, Unversioned };
/*
Forms complete paths to a module, from a list of base paths,
a module URI and version specification.
For example, QtQml.Models 2.0:
- base/QtQml/Models.2.0
- base/QtQml.2.0/Models
- base/QtQml/Models.2
- base/QtQml.2/Models
- base/QtQml/Models
*/
QStringList qQmlResolveImportPaths(QStringView uri, const QStringList &basePaths,
QTypeRevision version)
{
static const QLatin1Char Slash('/');
static const QLatin1Char Backslash('\\');
const QList<QStringView> parts = uri.split(u'.', Qt::SkipEmptyParts);
QStringList importPaths;
// fully & partially versioned parts + 1 unversioned for each base path
importPaths.reserve(2 * parts.size() + 1);
auto versionString = [](QTypeRevision version, ImportVersion mode)
{
if (mode == FullyVersioned) {
// extension with fully encoded version number (eg. MyModule.3.2)
return QString::fromLatin1(".%1.%2").arg(version.majorVersion())
.arg(version.minorVersion());
}
if (mode == PartiallyVersioned) {
// extension with encoded version major (eg. MyModule.3)
return QString::fromLatin1(".%1").arg(version.majorVersion());
}
// else extension without version number (eg. MyModule)
return QString();
};
auto joinStringRefs = [](const QList<QStringView> &refs, const QChar &sep) {
QString str;
for (auto it = refs.cbegin(); it != refs.cend(); ++it) {
if (it != refs.cbegin())
str += sep;
str += *it;
}
return str;
};
const ImportVersion initial = (version.hasMinorVersion())
? FullyVersioned
: (version.hasMajorVersion() ? PartiallyVersioned : Unversioned);
for (int mode = initial; mode <= Unversioned; ++mode) {
const QString ver = versionString(version, ImportVersion(mode));
for (const QString &path : basePaths) {
QString dir = path;
if (!dir.endsWith(Slash) && !dir.endsWith(Backslash))
dir += Slash;
// append to the end
importPaths += dir + joinStringRefs(parts, Slash) + ver;
if (mode != Unversioned) {
// insert in the middle
for (int index = parts.size() - 2; index >= 0; --index) {
importPaths += dir + joinStringRefs(parts.mid(0, index + 1), Slash)
+ ver + Slash
+ joinStringRefs(parts.mid(index + 1), Slash);
}
}
}
}
return importPaths;
}
QT_END_NAMESPACE