1 /*
2  * Copyright (C) 2016 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_SPLIT_TABLESPLITTER_H
18 #define AAPT_SPLIT_TABLESPLITTER_H
19 
20 #include <set>
21 #include <vector>
22 #include "android-base/macros.h"
23 
24 #include "ConfigDescription.h"
25 #include "ResourceTable.h"
26 #include "filter/ConfigFilter.h"
27 #include "process/IResourceTableConsumer.h"
28 
29 namespace aapt {
30 
31 struct SplitConstraints {
32   std::set<ConfigDescription> configs;
33 };
34 
35 struct TableSplitterOptions {
36   /**
37    * The preferred densities to keep in the table, stripping out all others.
38    * If empty, no stripping is done.
39    */
40   std::vector<uint16_t> preferred_densities;
41 
42   /**
43    * Configuration filter that determines which resource configuration values
44    * end up in the final table.
45    */
46   IConfigFilter* config_filter = nullptr;
47 };
48 
49 class TableSplitter {
50  public:
TableSplitter(const std::vector<SplitConstraints> & splits,const TableSplitterOptions & options)51   TableSplitter(const std::vector<SplitConstraints>& splits,
52                 const TableSplitterOptions& options)
53       : split_constraints_(splits), options_(options) {
54     for (size_t i = 0; i < split_constraints_.size(); i++) {
55       splits_.push_back(util::make_unique<ResourceTable>());
56     }
57   }
58 
59   bool VerifySplitConstraints(IAaptContext* context);
60 
61   void SplitTable(ResourceTable* original_table);
62 
splits()63   std::vector<std::unique_ptr<ResourceTable>>& splits() { return splits_; }
64 
65  private:
66   std::vector<SplitConstraints> split_constraints_;
67   std::vector<std::unique_ptr<ResourceTable>> splits_;
68   TableSplitterOptions options_;
69 
70   DISALLOW_COPY_AND_ASSIGN(TableSplitter);
71 };
72 }
73 
74 #endif /* AAPT_SPLIT_TABLESPLITTER_H */
75