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 FRAMEWORK_NATIVE_CMDS_LSHAL_TEXT_TABLE_H_ 18 #define FRAMEWORK_NATIVE_CMDS_LSHAL_TEXT_TABLE_H_ 19 20 #include <iostream> 21 #include <string> 22 #include <vector> 23 24 namespace android { 25 namespace lshal { 26 27 // An element in TextTable. This is either an actual row (an array of cells 28 // in this row), or a string of explanatory text. 29 // To see if this is an actual row, test fields().empty(). 30 class TextTableRow { 31 public: 32 // An empty line. TextTableRow()33 TextTableRow() {} 34 35 // A row of cells. TextTableRow(std::vector<std::string> && v)36 explicit TextTableRow(std::vector<std::string>&& v) : mFields(std::move(v)) {} 37 38 // A single comment string. TextTableRow(std::string && s)39 explicit TextTableRow(std::string&& s) : mLine(std::move(s)) {} TextTableRow(const std::string & s)40 explicit TextTableRow(const std::string& s) : mLine(s) {} 41 42 // Whether this row is an actual row of cells. isRow()43 bool isRow() const { return !fields().empty(); } 44 45 // Get all cells. fields()46 const std::vector<std::string>& fields() const { return mFields; } 47 48 // Get the single comment string. line()49 const std::string& line() const { return mLine; } 50 51 private: 52 std::vector<std::string> mFields; 53 std::string mLine; 54 }; 55 56 // A TextTable is a 2D array of strings. 57 class TextTable { 58 public: 59 60 // Add a TextTableRow. add()61 void add() { mTable.emplace_back(); } add(std::vector<std::string> && v)62 void add(std::vector<std::string>&& v) { 63 computeWidth(v); 64 mTable.emplace_back(std::move(v)); 65 } add(const std::string & s)66 void add(const std::string& s) { mTable.emplace_back(s); } add(std::string && s)67 void add(std::string&& s) { mTable.emplace_back(std::move(s)); } 68 69 void addAll(TextTable&& other); 70 71 // Prints the table to out, with column widths adjusted appropriately according 72 // to the content. 73 void dump(std::ostream& out) const; 74 75 private: 76 void computeWidth(const std::vector<std::string>& v); 77 std::vector<size_t> mWidths; 78 std::vector<TextTableRow> mTable; 79 }; 80 81 } // namespace lshal 82 } // namespace android 83 84 #endif // FRAMEWORK_NATIVE_CMDS_LSHAL_TEXT_TABLE_H_ 85