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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 "ConfigDescription.h"
     21 #include "ResourceTable.h"
     22 #include "filter/ConfigFilter.h"
     23 #include "process/IResourceTableConsumer.h"
     24 
     25 #include <android-base/macros.h>
     26 #include <set>
     27 #include <vector>
     28 
     29 namespace aapt {
     30 
     31 struct SplitConstraints {
     32     std::set<ConfigDescription> configs;
     33 };
     34 
     35 struct TableSplitterOptions {
     36     /**
     37      * The preferred density to keep in the table, stripping out all others.
     38      */
     39     Maybe<uint16_t> preferredDensity;
     40 
     41     /**
     42      * Configuration filter that determines which resource configuration values end up in
     43      * the final table.
     44      */
     45     IConfigFilter* configFilter = nullptr;
     46 };
     47 
     48 class TableSplitter {
     49 public:
     50     TableSplitter(const std::vector<SplitConstraints>& splits,
     51                   const TableSplitterOptions& options) :
     52             mSplitConstraints(splits), mPreferredDensity(options.preferredDensity),
     53             mConfigFilter(options.configFilter) {
     54         for (size_t i = 0; i < mSplitConstraints.size(); i++) {
     55             mSplits.push_back(util::make_unique<ResourceTable>());
     56         }
     57     }
     58 
     59     bool verifySplitConstraints(IAaptContext* context);
     60 
     61     void splitTable(ResourceTable* originalTable);
     62 
     63     const std::vector<std::unique_ptr<ResourceTable>>& getSplits() {
     64         return mSplits;
     65     }
     66 
     67 private:
     68     std::vector<SplitConstraints> mSplitConstraints;
     69     std::vector<std::unique_ptr<ResourceTable>> mSplits;
     70     Maybe<uint16_t> mPreferredDensity;
     71     IConfigFilter* mConfigFilter;
     72 
     73     DISALLOW_COPY_AND_ASSIGN(TableSplitter);
     74 };
     75 
     76 }
     77 
     78 #endif /* AAPT_SPLIT_TABLESPLITTER_H */
     79