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      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:
     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 
     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