src/TexStream.cpp

   1 /**
   2  * \file TexStream.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * Full author contact details are available in file CREDITS.
   7  *
   8  * Inspired by Dietmar Kuehl's prefix iostreams found on
   9  * http://www.inf.uni-konstanz.de/~kuehl/
  10  */
  11
  12 #include <config.h>
  13
  14 #include "TexStream.h"
  15 #include "TexRow.h"
  16
  17 #include <iostream>
  18 #include <streambuf>
  19
  20 namespace lyx {
  21
  22 ////////////////////////////////////////////////////////////////
  23 //
  24 // TexStreamBuffer
  25 //
  26 ////////////////////////////////////////////////////////////////
  27
  28
  29 class TexStreamBuffer : public TexStreamBase
  30 {
  31 public:
  32         TexStreamBuffer(TexStreamBase * sbuf, TexRow * texrow);
  33         int line() const { return line_; }
  34         int column() const { return column_; }
  35
  36 protected:
  37         int overflow(int);
  38         int sync();
  39
  40 private:
  41         TexStreamBase * sbuf_;
  42         TexRow * texrow_;
  43         int column_;
  44         int line_;
  45 };
  46
  47
  48 TexStreamBuffer::TexStreamBuffer(TexStreamBase *sb, TexRow * texrow)
  49   : sbuf_(sb), texrow_(texrow), line_(0)
  50 {
  51         setp(0, 0);
  52         setg(0, 0, 0);
  53 }
  54
  55 int TexStreamBuffer::overflow(int c)
  56 {
  57         if (c == '\n') {
  58                 ++line_;
  59                 column_ = 0;
  60         } else {
  61                 ++column_;
  62         }
  63         return c;
  64 }
  65
  66
  67 int TexStreamBuffer::sync()
  68 {
  69         sbuf_->pubsync();
  70         return 0;
  71 }
  72
  73
  74 ////////////////////////////////////////////////////////////////
  75 //
  76 // TexStream
  77 //
  78 ////////////////////////////////////////////////////////////////
  79
  80 TexStream::TexStream(TexStreamBase * sbuf, TexRow * texrow)
  81                 : std::basic_ostream<char_type>(sbuf_ = new TexStreamBuffer(sbuf, texrow))
  82 {}
  83
  84
  85 TexStream::~TexStream()
  86 {
  87         delete sbuf_;
  88 }
  89
  90
  91 int TexStream::line() const
  92 {
  93         return sbuf_->line();
  94 }
  95
  96
  97 ////////////////////////////////////////////////////////////////
  98 //
  99 // Test
 100 //
 101 ////////////////////////////////////////////////////////////////
 102
 103 #if 0
 104
 105 int main(int argc, char *argv[])
 106 {
 107         TexStream out(cout.rdbuf());
 108         char c;
 109         while (cin) {
 110                 if (cin.get(c))
 111                         out.put(c);
 112         }
 113         cout << "line count: " << out.line() << endl;
 114
 115         return 0;
 116 }
 117
 118 #endif
 119
 120 }
 121