1 | // Copyright (C) 2020 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #include "qqmlimportresolver_p.h" |
5 | |
6 | QT_BEGIN_NAMESPACE |
7 | |
8 | enum ImportVersion { FullyVersioned, PartiallyVersioned, Unversioned }; |
9 | |
10 | /* |
11 | Forms complete paths to a module, from a list of base paths, |
12 | a module URI and version specification. |
13 | |
14 | For example, QtQml.Models 2.0: |
15 | - base/QtQml/Models.2.0 |
16 | - base/QtQml.2.0/Models |
17 | - base/QtQml/Models.2 |
18 | - base/QtQml.2/Models |
19 | - base/QtQml/Models |
20 | */ |
21 | QStringList qQmlResolveImportPaths(QStringView uri, const QStringList &basePaths, |
22 | QTypeRevision version) |
23 | { |
24 | static const QLatin1Char Slash('/'); |
25 | static const QLatin1Char Backslash('\\'); |
26 | |
27 | const QVector<QStringView> parts = uri.split(sep: u'.', behavior: Qt::SkipEmptyParts); |
28 | |
29 | QStringList importPaths; |
30 | // fully & partially versioned parts + 1 unversioned for each base path |
31 | importPaths.reserve(asize: 2 * parts.size() + 1); |
32 | |
33 | auto versionString = [](QTypeRevision version, ImportVersion mode) |
34 | { |
35 | if (mode == FullyVersioned) { |
36 | // extension with fully encoded version number (eg. MyModule.3.2) |
37 | return QString::fromLatin1(ba: ".%1.%2" ).arg(a: version.majorVersion()) |
38 | .arg(a: version.minorVersion()); |
39 | } |
40 | if (mode == PartiallyVersioned) { |
41 | // extension with encoded version major (eg. MyModule.3) |
42 | return QString::fromLatin1(ba: ".%1" ).arg(a: version.majorVersion()); |
43 | } |
44 | // else extension without version number (eg. MyModule) |
45 | return QString(); |
46 | }; |
47 | |
48 | auto joinStringRefs = [](const QVector<QStringView> &refs, const QChar &sep) { |
49 | QString str; |
50 | for (auto it = refs.cbegin(); it != refs.cend(); ++it) { |
51 | if (it != refs.cbegin()) |
52 | str += sep; |
53 | str += *it; |
54 | } |
55 | return str; |
56 | }; |
57 | |
58 | const ImportVersion initial = (version.hasMinorVersion()) |
59 | ? FullyVersioned |
60 | : (version.hasMajorVersion() ? PartiallyVersioned : Unversioned); |
61 | for (int mode = initial; mode <= Unversioned; ++mode) { |
62 | const QString ver = versionString(version, ImportVersion(mode)); |
63 | |
64 | for (const QString &path : basePaths) { |
65 | QString dir = path; |
66 | if (!dir.endsWith(c: Slash) && !dir.endsWith(c: Backslash)) |
67 | dir += Slash; |
68 | |
69 | // append to the end |
70 | importPaths += dir + joinStringRefs(parts, Slash) + ver; |
71 | |
72 | if (mode != Unversioned) { |
73 | // insert in the middle |
74 | for (int index = parts.size() - 2; index >= 0; --index) { |
75 | importPaths += dir + joinStringRefs(parts.mid(pos: 0, len: index + 1), Slash) |
76 | + ver + Slash |
77 | + joinStringRefs(parts.mid(pos: index + 1), Slash); |
78 | } |
79 | } |
80 | } |
81 | } |
82 | |
83 | return importPaths; |
84 | } |
85 | |
86 | QT_END_NAMESPACE |
87 | |