Panda3D
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00001 // Filename: indent.I 00002 // Created by: drose (15Feb99) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 //////////////////////////////////////////////////////////////////// 00016 // Function: write_long_list 00017 // Description: Writes a list of things to the indicated output 00018 // stream, with a space separating each item. One or 00019 // more lines will be written, and the lines will 00020 // automatically be broken such that no line exceeds 00021 // max_col columns if possible. 00022 //////////////////////////////////////////////////////////////////// 00023 template<class InputIterator> 00024 void 00025 write_long_list(ostream &out, int indent_level, 00026 InputIterator first, InputIterator last, 00027 string first_prefix, string later_prefix, 00028 int max_col) { 00029 if (later_prefix.empty()) { 00030 later_prefix = first_prefix; 00031 } 00032 00033 if (first != last) { 00034 // We have to use an intermediate strstream object so we can 00035 // count the number of characters the item will have when it is 00036 // output. 00037 ostringstream item; 00038 item << *first; 00039 string str = item.str(); 00040 00041 indent(out, indent_level) << first_prefix << str; 00042 int col = indent_level + first_prefix.length() + str.length(); 00043 00044 ++first; 00045 00046 while (first != last) { 00047 ostringstream item; 00048 item << *first; 00049 string str = item.str(); 00050 00051 col += 1 + str.length(); 00052 if (col > max_col) { 00053 out << "\n"; 00054 indent(out, indent_level) << later_prefix << str; 00055 col = indent_level + later_prefix.length() + str.length(); 00056 00057 } else { 00058 out << " " << str; 00059 } 00060 00061 ++first; 00062 } 00063 out << "\n"; 00064 } 00065 }