external/bsd/bind/dist/unit/atf-src/atf-c++/detail/ui.cpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 extern "C" {
  31 #include <sys/ioctl.h>
  32
  33 #include <termios.h>
  34 #include <unistd.h>
  35 }
  36
  37 #include <sstream>
  38
  39 #include "env.hpp"
  40 #include "text.hpp"
  41 #include "sanity.hpp"
  42 #include "text.hpp"
  43 #include "ui.hpp"
  44
  45 namespace impl = atf::ui;
  46 #define IMPL_NAME "atf::ui"
  47
  48 static
  49 size_t
  50 terminal_width(void)
  51 {
  52     static bool done = false;
  53     static size_t width = 0;
  54
  55     if (!done) {
  56         if (atf::env::has("COLUMNS")) {
  57             const std::string cols = atf::env::get("COLUMNS");
  58             if (cols.length() > 0) {
  59                 width = atf::text::to_type< size_t >(cols);
  60             }
  61         } else {
  62             struct winsize ws;
  63             if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1)
  64                 width = ws.ws_col;
  65         }
  66
  67         if (width >= 80)
  68             width -= 5;
  69
  70         done = true;
  71     }
  72
  73     return width;
  74 }
  75
  76 static
  77 std::string
  78 format_paragraph(const std::string& text,
  79                  const std::string& tag,
  80                  const bool first,
  81                  const bool repeat,
  82                  const size_t col)
  83 {
  84     PRE(text.find('\n') == std::string::npos);
  85
  86     const std::string pad(col - tag.length(), ' ');
  87     const std::string fullpad(col, ' ');
  88
  89     std::string formatted;
  90     if (first || repeat)
  91         formatted = tag + pad;
  92     else
  93         formatted = fullpad;
  94     INV(formatted.length() == col);
  95     size_t curcol = col;
  96
  97     const size_t maxcol = terminal_width();
  98
  99     std::vector< std::string > words = atf::text::split(text, " ");
 100     for (std::vector< std::string >::const_iterator iter = words.begin();
 101          iter != words.end(); iter++) {
 102         const std::string& word = *iter;
 103
 104         if (iter != words.begin() && maxcol > 0 &&
 105             curcol + word.length() + 1 > maxcol) {
 106             if (repeat)
 107                 formatted += '\n' + tag + pad;
 108             else
 109                 formatted += '\n' + fullpad;
 110             curcol = col;
 111         } else if (iter != words.begin()) {
 112             formatted += ' ';
 113             curcol++;
 114         }
 115
 116         formatted += word;
 117         curcol += word.length();
 118     }
 119
 120     return formatted;
 121 }
 122
 123 std::string
 124 impl::format_error(const std::string& prog_name, const std::string& error)
 125 {
 126     return format_text_with_tag("ERROR: " + error, prog_name + ": ", true);
 127 }
 128
 129 std::string
 130 impl::format_info(const std::string& prog_name, const std::string& msg)
 131 {
 132     return format_text_with_tag(msg, prog_name + ": ", true);
 133 }
 134
 135 std::string
 136 impl::format_text(const std::string& text)
 137 {
 138     return format_text_with_tag(text, "", false, 0);
 139 }
 140
 141 std::string
 142 impl::format_text_with_tag(const std::string& text, const std::string& tag,
 143                            bool repeat, size_t col)
 144 {
 145     PRE(col == 0 || col >= tag.length());
 146     if (col == 0)
 147         col = tag.length();
 148
 149     std::string formatted;
 150
 151     std::vector< std::string > lines = atf::text::split(text, "\n");
 152     for (std::vector< std::string >::const_iterator iter = lines.begin();
 153          iter != lines.end(); iter++) {
 154         const std::string& line = *iter;
 155
 156         formatted += format_paragraph(line, tag, iter == lines.begin(),
 157                                       repeat, col);
 158         if (iter + 1 != lines.end()) {
 159             if (repeat)
 160                 formatted += "\n" + tag + "\n";
 161             else
 162                 formatted += "\n\n";
 163         }
 164     }
 165
 166     return formatted;
 167 }
 168
 169 std::string
 170 impl::format_warning(const std::string& prog_name, const std::string& error)
 171 {
 172     return format_text_with_tag("WARNING: " + error, prog_name + ": ", true);
 173 }