src/mathed/MathAutoCorrect.cpp

   1 /**
   2  * \file MathAutoCorrect.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "MathAutoCorrect.h"
  14 #include "MathData.h"
  15 #include "InsetMath.h"
  16 #include "MathSupport.h"
  17 #include "MathParser.h"
  18
  19 #include "support/debug.h"
  20 #include "support/FileName.h"
  21 #include "support/filetools.h" //  LibFileSearch
  22 #include "support/docstream.h"
  23
  24 #include <fstream>
  25 #include <sstream>
  26
  27 using namespace std;
  28
  29 namespace lyx {
  30
  31 using support::libFileSearch;
  32
  33 namespace {
  34
  35 class Correction {
  36 public:
  37         ///
  38         Correction() {}
  39         ///
  40         bool correct(MathAtom & at, char_type c) const;
  41         ///
  42         bool read(idocstream & is);
  43         ///
  44         void write(odocstream & os) const;
  45 private:
  46         ///
  47         MathAtom from1_;
  48         ///
  49         char_type from2_;
  50         ///
  51         MathAtom to_;
  52 };
  53
  54
  55 bool Correction::read(idocstream & is)
  56 {
  57         docstring s1, s2, s3;
  58         is >> s1 >> s2 >> s3;
  59         if (!is)
  60                 return false;
  61         if (s2.size() != 1)
  62                 return false;
  63         MathData ar1, ar3;
  64         mathed_parse_cell(ar1, s1);
  65         mathed_parse_cell(ar3, s3);
  66         if (ar1.size() != 1 || ar3.size() != 1)
  67                 return false;
  68         from1_ = ar1.front();
  69         from2_ = s2[0];
  70         to_    = ar3.front();
  71         return true;
  72 }
  73
  74
  75 void Correction::write(odocstream & os) const
  76 {
  77         os << "from: '" << from1_ << "' and '" << from2_
  78            << "' to '" << to_ << '\'' << endl;
  79 }
  80
  81
  82 bool Correction::correct(MathAtom & at, char_type c) const
  83 {
  84         //LYXERR(Debug::MATHED,
  85         //      "trying to correct ar: " << at << " from: '" << from1_ << '\'');
  86         if (from2_ != c)
  87                 return false;
  88         if (asString(at) != asString(from1_))
  89                 return false;
  90         LYXERR(Debug::MATHED, "match found! subst in " << at
  91                 << " from: '" << from1_ << "' to '" << to_ << '\'');
  92         at = to_;
  93         return true;
  94 }
  95
  96
  97 idocstream & operator>>(idocstream & is, Correction & corr)
  98 {
  99         corr.read(is);
 100         return is;
 101 }
 102
 103
 104 odocstream & operator<<(odocstream & os, Correction & corr)
 105 {
 106         corr.write(os);
 107         return os;
 108 }
 109
 110
 111
 112
 113 class Corrections {
 114 public:
 115         ///
 116         typedef vector<Correction>::const_iterator const_iterator;
 117         ///
 118         Corrections() {}
 119         ///
 120         void insert(const Correction & corr) { data_.push_back(corr); }
 121         ///
 122         bool correct(MathAtom & at, char_type c) const;
 123 private:
 124         ///
 125         vector<Correction> data_;
 126 };
 127
 128
 129 bool Corrections::correct(MathAtom & at, char_type c) const
 130 {
 131         for (const_iterator it = data_.begin(); it != data_.end(); ++it)
 132                 if (it->correct(at, c))
 133                         return true;
 134         return false;
 135 }
 136
 137
 138 Corrections theCorrections;
 139
 140 void initAutoCorrect()
 141 {
 142         LYXERR(Debug::MATHED, "reading autocorrect file");
 143         support::FileName const file = libFileSearch(string(), "autocorrect");
 144         if (file.empty()) {
 145                 lyxerr << "Could not find autocorrect file" << endl;
 146                 return;
 147         }
 148
 149         string line;
 150         ifstream is(file.toFilesystemEncoding().c_str());
 151         while (getline(is, line)) {
 152                 if (line.size() == 0 || line[0] == '#') {
 153                         //LYXERR(Debug::MATHED, "ignoring line '" << line << '\'');
 154                         continue;
 155                 }
 156                 idocstringstream il(from_utf8(line));
 157
 158                 //LYXERR(Debug::MATHED, "line '" << line << '\'');
 159                 Correction corr;
 160                 if (corr.read(il)) {
 161                         //LYXERR(Debug::MATHED, "parsed: '" << corr << '\'');
 162                         theCorrections.insert(corr);
 163                 }
 164         }
 165
 166         LYXERR(Debug::MATHED, "done reading autocorrections.");
 167 }
 168
 169
 170 } // namespace anon
 171
 172
 173 bool math_autocorrect(MathAtom & at, char_type c)
 174 {
 175         static bool initialized = false;
 176
 177         if (!initialized) {
 178                 initAutoCorrect();
 179                 initialized = true;
 180         }
 181
 182         return theCorrections.correct(at, c);
 183 }
 184
 185
 186 } // namespace lyx