mi2mu/mudela-stream.cc

   1 //
   2 // mudela-stream.cc
   3 //
   4 // source file of the LilyPond music typesetter
   5 //
   6 // (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
   7
   8 #include <assert.h>
   9 #include <time.h>
  10 #include <fstream.h>
  11 #include "mi2mu-global.hh"
  12 #include "mudela-item.hh"
  13 #include "mudela-stream.hh"
  14
  15 extern String filename_str_g;
  16
  17 static int const INDENT_i = 8;
  18
  19 Mudela_stream::Mudela_stream (String filename_str)
  20 {
  21   filename_str_ = filename_str;
  22   pending_indent_i_ = 0;
  23   os_p_ = 0;
  24   indent_i_ = 0;
  25   comment_mode_b_ = false;
  26   column_i_ = 0;
  27   wrap_column_i_ = 68;
  28   open();
  29   header();
  30 }
  31
  32 Mudela_stream::~Mudela_stream()
  33 {
  34   delete os_p_;
  35   if  (indent_i_)
  36     warning ("lily indent level: " + String (indent_i_));
  37 }
  38
  39 Mudela_stream&
  40 Mudela_stream::operator << (String str)
  41 {
  42   static String word_sep_str = "{} \t\n";
  43   while  (str.length_i())
  44     {
  45       int i = str.index_any_i (word_sep_str) + 1;
  46       if  (!i)
  47         i = str.length_i();
  48       String word = str.left_str (i);
  49       str = str.mid_str (i, str.length_i());
  50       output_wrapped (word);
  51     }
  52   return *this;
  53 }
  54
  55 Mudela_stream&
  56 Mudela_stream::operator << (Mudela_item& mudela_item_r)
  57 {
  58   mudela_item_r.output (*this);
  59   *os_p_ << flush;
  60   return *this;
  61 }
  62
  63 void
  64 Mudela_stream::handle_pending_indent()
  65 {
  66   *os_p_ << String ('\t', pending_indent_i_);
  67   column_i_ += pending_indent_i_ * INDENT_i;
  68   pending_indent_i_ = 0;
  69 }
  70
  71 void
  72 Mudela_stream::header()
  73 {
  74   *os_p_ << "% Creator: " << mi2mu_version_str() << "\n";
  75   *os_p_ << "% Automatically generated, at ";
  76   time_t t (time (0));
  77   *os_p_ << ctime (&t);
  78   *os_p_ << "% from input file: ";
  79   //  *os_p_ << midi_parser_l_g->filename_str_;
  80   // ugh
  81   *os_p_ << filename_str_g;
  82   *os_p_ << "\n\n";
  83   // ugh
  84   *os_p_ << "\\version \"0.1.2\";\n";
  85 }
  86
  87 void
  88 Mudela_stream::open()
  89 {
  90   os_p_ = new ofstream (filename_str_.ch_C ());
  91   if  (!*os_p_)
  92     error  ("can't open: `" + filename_str_ + "\'");
  93 }
  94
  95 void
  96 Mudela_stream::output (String str)
  97 {
  98   for  (int i = 0; i < str.length_i(); i++)
  99     {
 100       char c = str[ i ];
 101       switch  (c)
 102         {
 103         case '{' :
 104         case '<' :
 105           handle_pending_indent();
 106           if  (column_i_ == indent_i_ * INDENT_i)
 107             output ("\t");
 108           indent_i_++;
 109           *os_p_ << c;
 110           column_i_++;
 111           break;
 112         case '}' :
 113         case '>' :
 114           assert (indent_i_);
 115           indent_i_--;
 116           if  (pending_indent_i_)
 117             pending_indent_i_--;
 118           handle_pending_indent();
 119           *os_p_ << c;
 120           column_i_++;
 121           break;
 122         case '%' :
 123           handle_pending_indent();
 124           comment_mode_b_ = true;
 125           *os_p_ << c;
 126           column_i_++;
 127           break;
 128         case '\t' :
 129           handle_pending_indent();
 130           *os_p_ << c;
 131           column_i_ += INDENT_i;
 132           break;
 133         case '\n' :
 134           *os_p_ << endl;
 135           pending_indent_i_ = indent_i_;
 136           column_i_ = 0;
 137           comment_mode_b_ = false;
 138           break;
 139         default :
 140           handle_pending_indent();
 141           *os_p_ << c;
 142           column_i_++;
 143           break;
 144         }
 145     }
 146 }
 147
 148 void
 149 Mudela_stream::output_wrapped (String str)
 150 {
 151   // enough room left -> doit
 152   if  (column_i_ + str.length_i() <= wrap_column_i_)
 153     {
 154       output (str);
 155       return;
 156     }
 157
 158   // we're at BOL already; this will never fit -> doit
 159   if  (column_i_ == indent_i_ * INDENT_i)
 160     {
 161       output (str);
 162       return;
 163     }
 164
 165   // ok, let's wrap
 166   // preserve comment mode
 167   if  (comment_mode_b_)
 168     output (String ("\n%"));
 169   else
 170     output (String ("\n"));
 171
 172   output (str);
 173 }
 174
 175