git://cygwin.com / cygwin-apps / setup.git / blame
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1 | /* |
| 2 | * Copyright (c) 2003 Robert Collins. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation; either version 2 of the License, or | |
| 7 | * (at your option) any later version. | |
| 8 | * | |
| 9 | * A copy of the GNU General Public License can be found at | |
| 10 | * http://www.gnu.org/ | |
| 11 | * | |
| 12 | * Written by Robert Collins <robertc@hotmail.com> | |
| 13 | * | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef _GETOPT___DEFAULTFORMATTER_H_ | |
| 17 | #define _GETOPT___DEFAULTFORMATTER_H_ | |
| 18 | ||
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19 | #include <iostream> |
| 20 | #include <vector> | |
| 21 | #include "getopt++/Option.h" | |
| 22 | ||
| 23 | /* Show the options on the left, the short description on the right. | |
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24 | * Option display must be < o_len characters in length. |
| 25 | * Descriptions must be < h_len characters in length. | |
| 26 | * For compatibility with default terminal width o_len + h_len <= 80. | |
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27 | */ |
| 28 | class DefaultFormatter { | |
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29 | private: |
| 30 | const unsigned int o_len; | |
| 31 | const unsigned int h_len; | |
| 32 | const std::string s_lead; | |
| 33 | const std::string l_lead; | |
| 20e315e1 | 34 | public: |
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35 | DefaultFormatter (std::ostream &aStream) |
| 36 | : o_len(35), h_len(45), | |
| 37 | s_lead(" -"), l_lead(" --"), | |
| 38 | theStream(aStream) | |
| 39 | {} | |
| 40 | DefaultFormatter (std::ostream &aStream, | |
| 41 | unsigned int o_len, unsigned int h_len, | |
| 42 | std::string s_lead, std::string l_lead) | |
| 43 | : o_len(o_len), h_len(h_len), | |
| 44 | s_lead(s_lead), l_lead(l_lead), | |
| 45 | theStream(aStream) | |
| 46 | {} | |
| 20e315e1 | 47 | void operator () (Option *anOption) { |
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48 | if (anOption->shortOption ()[0] == '\0') |
| 49 | theStream << " "; | |
| 50 | else | |
| 51 | theStream << s_lead << anOption->shortOption ()[0]; | |
| 52 | theStream << l_lead << anOption->longOption () | |
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53 | << std::string (o_len |
| 54 | - s_lead.size () - 1 - l_lead.size () | |
| 55 | - anOption->longOption ().size (), ' '); | |
| 20e315e1 | 56 | std::string helpmsg = anOption->shortHelp(); |
| e8bec9e7 | 57 | while (helpmsg.size() > h_len) |
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58 | { |
| 59 | // TODO: consider using a line breaking strategy here. | |
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60 | int pos = helpmsg.substr(0,h_len).find_last_of(" "); |
| 61 | theStream << helpmsg.substr(0,pos) | |
| 62 | << std::endl << std::string (o_len, ' '); | |
| 20e315e1 | 63 | helpmsg.erase (0,pos+1); |
| 20e315e1 | 64 | } |
| e8bec9e7 | 65 | theStream << helpmsg << std::endl; |
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66 | } |
| 67 | std::ostream &theStream; | |
| 68 | }; | |
| 69 | ||
| 20e315e1 | 70 | #endif // _GETOPT___DEFAULTFORMATTER_H_ |