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 #ifndef AAPT_FORMAT_BINARY_TABLEFLATTENER_H 18 #define AAPT_FORMAT_BINARY_TABLEFLATTENER_H 19 20 #include "android-base/macros.h" 21 22 #include "ResourceTable.h" 23 #include "process/IResourceTableConsumer.h" 24 #include "util/BigBuffer.h" 25 26 namespace aapt { 27 28 // The percentage of used entries for a type for which using a sparse encoding is 29 // preferred. 30 constexpr const size_t kSparseEncodingThreshold = 60; 31 32 struct TableFlattenerOptions { 33 // When true, types for configurations with a sparse set of entries are encoded 34 // as a sparse map of entry ID and offset to actual data. 35 // This is only available on platforms O+ and will only be respected when 36 // minSdk is O+. 37 bool use_sparse_entries = false; 38 39 // When true, the key string pool in the final ResTable 40 // is collapsed to a single entry. All resource entries 41 // have name indices that point to this single value 42 bool collapse_key_stringpool = false; 43 44 // Set of whitelisted resource names to avoid altering in key stringpool 45 std::set<std::string> whitelisted_resources; 46 }; 47 48 class TableFlattener : public IResourceTableConsumer { 49 public: TableFlattener(const TableFlattenerOptions & options,BigBuffer * buffer)50 explicit TableFlattener(const TableFlattenerOptions& options, BigBuffer* buffer) 51 : options_(options), buffer_(buffer) { 52 } 53 54 bool Consume(IAaptContext* context, ResourceTable* table) override; 55 56 private: 57 DISALLOW_COPY_AND_ASSIGN(TableFlattener); 58 59 TableFlattenerOptions options_; 60 BigBuffer* buffer_; 61 }; 62 63 } // namespace aapt 64 65 #endif /* AAPT_FORMAT_BINARY_TABLEFLATTENER_H */ 66