src/output_plaintext.cpp

   1 /**
   2  * \file output_plaintext.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "output_plaintext.h"
  14
  15 #include "Buffer.h"
  16 #include "BufferParams.h"
  17 #include "Layout.h"
  18 #include "output.h"
  19 #include "OutputParams.h"
  20 #include "Paragraph.h"
  21 #include "ParagraphList.h"
  22 #include "ParagraphParameters.h"
  23
  24 #include "support/debug.h"
  25 #include "support/gettext.h"
  26 #include "support/lstrings.h"
  27
  28 using namespace std;
  29 using namespace lyx::support;
  30
  31 namespace lyx {
  32
  33
  34 void writePlaintextFile(Buffer const & buf, FileName const & fname,
  35         OutputParams const & runparams)
  36 {
  37         odocfstream ofs;
  38         if (!openFileWrite(ofs, fname))
  39                 return;
  40         writePlaintextFile(buf, ofs, runparams);
  41 }
  42
  43
  44 void writePlaintextFile(Buffer const & buf, odocstream & os,
  45         OutputParams const & runparams)
  46 {
  47         bool ref_printed = false;
  48         ParagraphList const par = buf.paragraphs();
  49         ParagraphList::const_iterator beg = par.begin();
  50         ParagraphList::const_iterator end = par.end();
  51         ParagraphList::const_iterator it = beg;
  52         for (; it != end; ++it) {
  53                 writePlaintextParagraph(buf, *it, os, runparams, ref_printed);
  54                 os << "\n";
  55                 if (runparams.linelen > 0)
  56                         os << "\n";
  57         }
  58 }
  59
  60
  61 static pair<int, docstring> addDepth(int depth, int ldepth)
  62 {
  63         int d = depth * 2;
  64         if (ldepth > depth)
  65                 d += (ldepth - depth) * 2;
  66         return make_pair(d, docstring(d, ' '));
  67 }
  68
  69 void writePlaintextParagraph(Buffer const & buf,
  70                     Paragraph const & par,
  71                     odocstream & os,
  72                     OutputParams const & runparams,
  73                     bool & ref_printed)
  74 {
  75         int ltype = 0;
  76         depth_type ltype_depth = 0;
  77         depth_type depth = par.params().depth();
  78
  79         // First write the layout
  80         string const tmp = to_utf8(par.layout().name());
  81         if (compare_ascii_no_case(tmp, "itemize") == 0) {
  82                 ltype = 1;
  83                 ltype_depth = depth + 1;
  84         } else if (compare_ascii_no_case(tmp, "enumerate") == 0) {
  85                 ltype = 2;
  86                 ltype_depth = depth + 1;
  87         } else if (contains(ascii_lowercase(tmp), "ection")) {
  88                 ltype = 3;
  89                 ltype_depth = depth + 1;
  90         } else if (contains(ascii_lowercase(tmp), "aragraph")) {
  91                 ltype = 4;
  92                 ltype_depth = depth + 1;
  93         } else if (compare_ascii_no_case(tmp, "description") == 0) {
  94                 ltype = 5;
  95                 ltype_depth = depth + 1;
  96         } else if (compare_ascii_no_case(tmp, "abstract") == 0) {
  97                 ltype = 6;
  98                 ltype_depth = 0;
  99         } else if (compare_ascii_no_case(tmp, "bibliography") == 0) {
 100                 ltype = 7;
 101                 ltype_depth = 0;
 102         } else {
 103                 ltype = 0;
 104                 ltype_depth = 0;
 105         }
 106
 107         /* the labelwidthstring used in lists */
 108
 109         /* noindent ? */
 110
 111         /* what about the alignment */
 112
 113         // runparams.linelen == 0 is special and means we don't have paragraph breaks
 114
 115         string::size_type currlinelen = 0;
 116
 117         os << docstring(depth * 2, ' ');
 118         currlinelen += depth * 2;
 119
 120         //--
 121         // we should probably change to the paragraph language in the
 122         // support/gettext.here (if possible) so that strings are output in
 123         // the correct language! (20012712 Jug)
 124         //--
 125         switch (ltype) {
 126         case 0: // Standard
 127         case 4: // (Sub)Paragraph
 128         case 5: // Description
 129                 break;
 130
 131         case 6: // Abstract
 132                 if (runparams.linelen > 0) {
 133                         os << buf.B_("Abstract") << "\n\n";
 134                         currlinelen = 0;
 135                 } else {
 136                         docstring const abst = buf.B_("Abstract: ");
 137                         os << abst;
 138                         currlinelen += abst.length();
 139                 }
 140                 break;
 141
 142         case 7: // Bibliography
 143                 if (!ref_printed) {
 144                         if (runparams.linelen > 0) {
 145                                 os << buf.B_("References") << "\n\n";
 146                                 currlinelen = 0;
 147                         } else {
 148                                 docstring const refs = buf.B_("References: ");
 149                                 os << refs;
 150                                 currlinelen += refs.length();
 151                         }
 152                         ref_printed = true;
 153                 }
 154                 break;
 155
 156         default: {
 157                 docstring const label = par.params().labelString();
 158                 if (!label.empty()) {
 159                         os << label << ' ';
 160                         currlinelen += label.length() + 1;
 161                 }
 162                 break;
 163         }
 164
 165         }
 166
 167         if (currlinelen == 0) {
 168                 pair<int, docstring> p = addDepth(depth, ltype_depth);
 169                 os << p.second;
 170                 currlinelen += p.first;
 171         }
 172
 173         docstring word;
 174
 175         for (pos_type i = 0; i < par.size(); ++i) {
 176                 // deleted characters don't make much sense in plain text output
 177                 if (par.isDeleted(i))
 178                         continue;
 179
 180                 char_type c = par.getUChar(buf.params(), i);
 181
 182                 if (par.isInset(i) || c == ' ') {
 183                         if (runparams.linelen > 0 &&
 184                             currlinelen + word.length() > runparams.linelen) {
 185                                 os << '\n';
 186                                 pair<int, docstring> p = addDepth(depth, ltype_depth);
 187                                 os << p.second;
 188                                 currlinelen = p.first;
 189                         }
 190                         os << word;
 191                         currlinelen += word.length();
 192                         word.erase();
 193                 }
 194
 195                 if (par.isInset(i)) {
 196                         OutputParams rp = runparams;
 197                         rp.depth = par.params().depth();
 198                         int len = par.getInset(i)->plaintext(os, rp);
 199                         if (len >= Inset::PLAINTEXT_NEWLINE)
 200                                 currlinelen = len - Inset::PLAINTEXT_NEWLINE;
 201                         else
 202                                 currlinelen += len;
 203                         continue;
 204                 }
 205
 206                 switch (c) {
 207                 case ' ':
 208                         os << ' ';
 209                         currlinelen++;
 210                         break;
 211
 212                 case '\0':
 213                         LYXERR(Debug::INFO, "writePlaintextFile: NUL char in structure.");
 214                         break;
 215
 216                 default:
 217                         word += c;
 218                         break;
 219                 }
 220         }
 221
 222         // currlinelen may be greater than runparams.linelen!
 223         // => check whether word is empty and do nothing in this case
 224         if (!word.empty()) {
 225                 if (runparams.linelen > 0 &&
 226                     currlinelen + word.length() > runparams.linelen) {
 227                         os << '\n';
 228                         pair<int, docstring> p = addDepth(depth, ltype_depth);
 229                         os << p.second;
 230                         currlinelen = p.first;
 231                 }
 232                 os << word;
 233         }
 234 }
 235
 236
 237 } // namespace lyx