1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "util/Maybe.h"
18 #include "util/Util.h"
19 #include "xml/XmlUtil.h"
20
21 #include <string>
22
23 namespace aapt {
24 namespace xml {
25
extractPackageFromNamespace(const std::u16string & namespaceUri)26 Maybe<ExtractedPackage> extractPackageFromNamespace(const std::u16string& namespaceUri) {
27 if (util::stringStartsWith<char16_t>(namespaceUri, kSchemaPublicPrefix)) {
28 StringPiece16 schemaPrefix = kSchemaPublicPrefix;
29 StringPiece16 package = namespaceUri;
30 package = package.substr(schemaPrefix.size(), package.size() - schemaPrefix.size());
31 if (package.empty()) {
32 return {};
33 }
34 return ExtractedPackage{ package.toString(), false /* isPrivate */ };
35
36 } else if (util::stringStartsWith<char16_t>(namespaceUri, kSchemaPrivatePrefix)) {
37 StringPiece16 schemaPrefix = kSchemaPrivatePrefix;
38 StringPiece16 package = namespaceUri;
39 package = package.substr(schemaPrefix.size(), package.size() - schemaPrefix.size());
40 if (package.empty()) {
41 return {};
42 }
43 return ExtractedPackage{ package.toString(), true /* isPrivate */ };
44
45 } else if (namespaceUri == kSchemaAuto) {
46 return ExtractedPackage{ std::u16string(), true /* isPrivate */ };
47 }
48 return {};
49 }
50
transformReferenceFromNamespace(IPackageDeclStack * declStack,const StringPiece16 & localPackage,Reference * inRef)51 void transformReferenceFromNamespace(IPackageDeclStack* declStack,
52 const StringPiece16& localPackage, Reference* inRef) {
53 if (inRef->name) {
54 if (Maybe<ExtractedPackage> transformedPackage =
55 declStack->transformPackageAlias(inRef->name.value().package, localPackage)) {
56 ExtractedPackage& extractedPackage = transformedPackage.value();
57 inRef->name.value().package = std::move(extractedPackage.package);
58
59 // If the reference was already private (with a * prefix) and the namespace is public,
60 // we keep the reference private.
61 inRef->privateReference |= extractedPackage.privateNamespace;
62 }
63 }
64 }
65
66 } // namespace xml
67 } // namespace aapt
68