Adam Lesinski | c744ae8 | 2017-05-17 19:28:38 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | #ifndef AAPT_LINKER_XMLCOMPATVERSIONER_H |
| 18 | #define AAPT_LINKER_XMLCOMPATVERSIONER_H |
| 19 | |
| 20 | #include <set> |
| 21 | #include <unordered_map> |
| 22 | #include <vector> |
| 23 | |
| 24 | #include "android-base/macros.h" |
| 25 | |
| 26 | #include "Resource.h" |
| 27 | #include "SdkConstants.h" |
| 28 | #include "process/IResourceTableConsumer.h" |
| 29 | #include "util/Util.h" |
| 30 | #include "xml/XmlDom.h" |
| 31 | |
| 32 | namespace aapt { |
| 33 | |
| 34 | class IDegradeRule; |
| 35 | |
| 36 | struct DegradeResult { |
| 37 | xml::Attribute attr; |
| 38 | ApiVersion attr_api_version; |
| 39 | }; |
| 40 | |
| 41 | class IDegradeRule { |
| 42 | public: |
| 43 | IDegradeRule() = default; |
| 44 | virtual ~IDegradeRule() = default; |
| 45 | |
| 46 | virtual std::vector<DegradeResult> Degrade(const xml::Element& src_el, |
| 47 | const xml::Attribute& src_attr, |
| 48 | StringPool* out_string_pool) const = 0; |
| 49 | |
| 50 | private: |
| 51 | DISALLOW_COPY_AND_ASSIGN(IDegradeRule); |
| 52 | }; |
| 53 | |
| 54 | class XmlCompatVersioner { |
| 55 | public: |
| 56 | using Rules = std::unordered_map<ResourceId, std::unique_ptr<IDegradeRule>>; |
| 57 | |
| 58 | XmlCompatVersioner(const Rules* rules); |
| 59 | |
| 60 | std::vector<std::unique_ptr<xml::XmlResource>> Process(IAaptContext* context, |
| 61 | xml::XmlResource* doc, |
| 62 | util::Range<ApiVersion> api_range); |
| 63 | |
| 64 | private: |
| 65 | DISALLOW_COPY_AND_ASSIGN(XmlCompatVersioner); |
| 66 | |
| 67 | std::unique_ptr<xml::XmlResource> ProcessDoc(ApiVersion target_api, ApiVersion max_api, |
| 68 | xml::XmlResource* doc, |
| 69 | std::set<ApiVersion>* out_apis_referenced); |
| 70 | void ProcessRule(const xml::Element& src_el, const xml::Attribute& src_attr, |
| 71 | const ApiVersion& src_attr_version, const IDegradeRule* rule, |
| 72 | const util::Range<ApiVersion>& api_range, bool generated, xml::Element* dst_el, |
| 73 | std::set<ApiVersion>* out_apis_referenced, StringPool* out_string_pool); |
| 74 | |
| 75 | const Rules* rules_; |
| 76 | }; |
| 77 | |
| 78 | struct ReplacementAttr { |
| 79 | std::string name; |
| 80 | ResourceId id; |
| 81 | Attribute attr; |
| 82 | }; |
| 83 | |
| 84 | class DegradeToManyRule : public IDegradeRule { |
| 85 | public: |
| 86 | DegradeToManyRule(std::vector<ReplacementAttr> attrs); |
| 87 | virtual ~DegradeToManyRule() = default; |
| 88 | |
| 89 | std::vector<DegradeResult> Degrade(const xml::Element& src_el, const xml::Attribute& src_attr, |
| 90 | StringPool* out_string_pool) const override; |
| 91 | |
| 92 | private: |
| 93 | DISALLOW_COPY_AND_ASSIGN(DegradeToManyRule); |
| 94 | |
| 95 | std::vector<ReplacementAttr> attrs_; |
| 96 | }; |
| 97 | |
| 98 | } // namespace aapt |
| 99 | |
| 100 | #endif // AAPT_LINKER_XMLCOMPATVERSIONER_H |