src/output_xhtml.cpp

   1 /**
   2  * \file output_xhtml.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Richard Heck
   7  *
   8  * This code is based upon output_docbook.cpp
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "output_xhtml.h"
  16
  17 #include "Buffer.h"
  18 #include "buffer_funcs.h"
  19 #include "BufferParams.h"
  20 #include "Counters.h"
  21 #include "Layout.h"
  22 #include "OutputParams.h"
  23 #include "Paragraph.h"
  24 #include "paragraph_funcs.h"
  25 #include "ParagraphList.h"
  26 #include "ParagraphParameters.h"
  27 #include "sgml.h"
  28 #include "TextClass.h"
  29
  30 #include "support/lassert.h"
  31 #include "support/debug.h"
  32 #include "support/lstrings.h"
  33
  34 #include <boost/next_prior.hpp>
  35 #include <vector>
  36
  37 using namespace std;
  38 using namespace lyx::support;
  39
  40 namespace lyx {
  41
  42 namespace html {
  43
  44 docstring escapeChar(char_type c)
  45 {
  46         docstring str;
  47         switch (c) {
  48         case ' ':
  49                 str += " ";
  50                 break;
  51         case '&':
  52                 str += "&amp;";
  53                 break;
  54         case '<':
  55                 str += "&lt;";
  56                 break;
  57         case '>':
  58                 str += "&gt;";
  59                 break;
  60         default:
  61                 str += c;
  62                 break;
  63         }
  64         return str;
  65 }
  66
  67
  68 // FIXME This needs to be protected somehow.
  69 static vector<string> taglist;
  70
  71 bool openTag(odocstream & os, string const & tag, string const & attr)
  72 {
  73         if (tag.empty())
  74                 return false;
  75         // FIXME This is completely primitive. We need something
  76         // a lot better.
  77         // Now do some checks on nesting of tags.
  78         if (tag == "p")
  79                 if (find(taglist.begin(), taglist.end(), "p") != taglist.end())
  80                         return false;
  81         os << from_ascii("<" + tag + (attr.empty() ? "" : " " + attr) + ">");
  82         taglist.push_back(tag);
  83         return true;
  84 }
  85
  86
  87 bool closeTag(odocstream & os, string const & tag)
  88 {
  89         if (tag.empty())
  90                 return false;
  91         // FIXME Check for proper nesting
  92         if (taglist.empty()){
  93                 LYXERR0("Last tag not found when closing `" << tag << "'!");
  94                 return false;
  95         }
  96         string const & lasttag = taglist.back();
  97         if (lasttag != tag)  {
  98                 LYXERR0("Last tag was `" << lasttag << "' when closing `" << tag << "'!");
  99                 return false;
 100         }
 101         taglist.pop_back();
 102         os << from_ascii("</" + tag + ">");
 103         return true;
 104 }
 105
 106
 107
 108 } // html
 109
 110 namespace {
 111
 112 bool openTag(odocstream & os, Layout const & lay)
 113 {
 114         return html::openTag(os, lay.htmltag(), lay.htmlattr());
 115 }
 116
 117
 118 bool closeTag(odocstream & os, Layout const & lay)
 119 {
 120         return html::closeTag(os, lay.htmltag());
 121 }
 122
 123
 124 bool openLabelTag(odocstream & os, Layout const & lay)
 125 {
 126         return html::openTag(os, lay.htmllabel(), lay.htmllabelattr());
 127 }
 128
 129
 130 bool closeLabelTag(odocstream & os, Layout const & lay)
 131 {
 132         return html::closeTag(os, lay.htmllabel());
 133 }
 134
 135
 136 bool openItemTag(odocstream & os, Layout const & lay)
 137 {
 138         return html::openTag(os, lay.htmlitem(), lay.htmlitemattr());
 139 }
 140
 141
 142 bool closeItemTag(odocstream & os, Layout const & lay)
 143 {
 144         return html::closeTag(os, lay.htmlitem());
 145 }
 146
 147 ParagraphList::const_iterator searchParagraph(
 148         ParagraphList::const_iterator p,
 149   ParagraphList::const_iterator const & pend)
 150 {
 151         for (++p; p != pend && p->layout().latextype == LATEX_PARAGRAPH; ++p)
 152                 ;
 153
 154         return p;
 155 }
 156
 157
 158 ParagraphList::const_iterator searchEnvironment(
 159                 ParagraphList::const_iterator p,
 160                 ParagraphList::const_iterator const & pend)
 161 {
 162         Layout const & bstyle = p->layout();
 163         size_t const depth = p->params().depth();
 164         for (++p; p != pend; ++p) {
 165                 Layout const & style = p->layout();
 166                 // It shouldn't happen that e.g. a section command occurs inside
 167                 // a quotation environment, at a higher depth, but as of 6/2009,
 168                 // it can happen. We pretend that it's just at lowest depth.
 169                 if (style.latextype == LATEX_COMMAND)
 170                         return p;
 171                 // If depth is down, we're done
 172                 if (p->params().depth() < depth)
 173                         return p;
 174                 // If depth is up, we're not done
 175                 if (p->params().depth() > depth)
 176                         continue;
 177                 // Now we know we are at the same depth
 178                 if (style.latextype == LATEX_PARAGRAPH
 179                     || style.latexname() != bstyle.latexname())
 180                         return p;
 181
 182         }
 183         return pend;
 184 }
 185
 186
 187 ParagraphList::const_iterator makeParagraphs(Buffer const & buf,
 188                                             odocstream & os,
 189                                             OutputParams const & runparams,
 190                                             ParagraphList const & paragraphs,
 191                                             ParagraphList::const_iterator const & pbegin,
 192                                             ParagraphList::const_iterator const & pend)
 193 {
 194         ParagraphList::const_iterator par = pbegin;
 195         for (; par != pend; ++par) {
 196                 Layout const & lay = par->layout();
 197                 if (!lay.counter.empty())
 198                         buf.params().documentClass().counters().step(lay.counter);
 199                 if (par != pbegin)
 200                         os << '\n';
 201                 bool const opened = openTag(os, lay);
 202                 par->simpleLyXHTMLOnePar(buf, os, runparams,
 203                                 outerFont(distance(paragraphs.begin(), par), paragraphs));
 204                 if (opened) {
 205                         closeTag(os, lay);
 206                         os << '\n';
 207                 }
 208         }
 209         return pend;
 210 }
 211
 212
 213 ParagraphList::const_iterator makeEnvironment(Buffer const & buf,
 214                                               odocstream & os,
 215                                               OutputParams const & runparams,
 216                                               ParagraphList const & paragraphs,
 217                                               ParagraphList::const_iterator const & pbegin,
 218                                               ParagraphList::const_iterator const & pend) {
 219
 220         ParagraphList::const_iterator par = pbegin;
 221         Layout const & bstyle = par->layout();
 222         depth_type const origdepth = pbegin->params().depth();
 223
 224         // Open tag for this environment
 225         bool const main_tag_opened = openTag(os, bstyle);
 226         os << '\n';
 227
 228         // we will on occasion need to remember a layout from before.
 229         Layout const * lastlay = 0;
 230
 231         while (par != pend) {
 232                 Layout const & style = par->layout();
 233                 if (!style.counter.empty())
 234                         buf.params().documentClass().counters().step(style.counter);
 235                 ParagraphList::const_iterator send;
 236                 // this will be positive, if we want to skip the initial word
 237                 // (if it's been taken for the label).
 238                 pos_type sep = 0;
 239
 240                 switch (style.latextype) {
 241                 case LATEX_ENVIRONMENT:
 242                 case LATEX_LIST_ENVIRONMENT:
 243                 case LATEX_ITEM_ENVIRONMENT: {
 244                         // There are two possiblities in this case.
 245                         // One is that we are still in the environment in which we
 246                         // started---which we will be if the depth is the same.
 247                         if (par->params().depth() == origdepth) {
 248                                 if (lastlay != 0) {
 249                                         closeItemTag(os, *lastlay);
 250                                         lastlay = 0;
 251                                 }
 252                                 Layout const & cstyle = par->layout();
 253                                 if (cstyle.labeltype == LABEL_MANUAL) {
 254                                         bool const label_tag_opened = openLabelTag(os, cstyle);
 255                                         sep = par->firstWordLyXHTML(os, runparams);
 256                                         if (label_tag_opened)
 257                                                 closeLabelTag(os, cstyle);
 258                                         os << '\n';
 259                                 } else if (style.latextype == LATEX_ENVIRONMENT
 260                                            && style.labeltype != LABEL_NO_LABEL) {
 261                                         bool const label_tag_opened = openLabelTag(os, cstyle);
 262                                         os << pbegin->expandLabel(style, buf.params(), false);
 263                                         if (label_tag_opened)
 264                                                 closeLabelTag(os, cstyle);
 265                                         os << '\n';
 266                                 }
 267
 268                                 bool const item_tag_opened = openItemTag(os, cstyle);
 269                                 par->simpleLyXHTMLOnePar(buf, os, runparams,
 270                                         outerFont(distance(paragraphs.begin(), par), paragraphs), sep);
 271                                 ++par;
 272                                 // We may not want to close the tag yet, in particular,
 273                                 if (item_tag_opened
 274                                                 // if we're not at the end...
 275                                     && par != pend
 276                                     //  and are doing items...
 277                                     && style.latextype == LATEX_ITEM_ENVIRONMENT
 278                                     // and if the depth has changed...
 279                                     && par->params().depth() != origdepth) {
 280                                                 // then we'll save this layout for later, and close it when
 281                                                 // we get another item.
 282                                                 lastlay = &cstyle;
 283                                 } else {
 284                                                 closeItemTag(os, cstyle); // FIXME
 285                                         os << '\n';
 286                                 }
 287                         }
 288                         // The other possibility is that the depth has increased, in which
 289                         // case we need to recurse.
 290                         else {
 291                                 send = searchEnvironment(par, pend);
 292                                 par = makeEnvironment(buf, os, runparams, paragraphs, par, send);
 293                         }
 294                         break;
 295                 }
 296                 case LATEX_PARAGRAPH:
 297                         send = searchParagraph(par, pend);
 298                         par = makeParagraphs(buf, os, runparams, paragraphs, par, send);
 299                         break;
 300                 // FIXME
 301                 case LATEX_BIB_ENVIRONMENT:
 302                 case LATEX_COMMAND:
 303                         break;
 304                 }
 305         }
 306
 307         if (lastlay != 0)
 308                 closeItemTag(os, *lastlay);
 309         if (main_tag_opened)
 310                 closeTag(os, bstyle);
 311         os << '\n';
 312         return pend;
 313 }
 314
 315
 316 void makeCommand(Buffer const & buf,
 317                                           odocstream & os,
 318                                           OutputParams const & runparams,
 319                                           ParagraphList const & paragraphs,
 320                                           ParagraphList::const_iterator const & pbegin)
 321 {
 322         Layout const & style = pbegin->layout();
 323         if (!style.counter.empty())
 324                 buf.params().documentClass().counters().step(style.counter);
 325
 326         bool const main_tag_opened = openTag(os, style);
 327
 328         // Label around sectioning number:
 329         if (style.labeltype != LABEL_NO_LABEL) {
 330                 bool const label_tag_opened = openLabelTag(os, style);
 331                 os << pbegin->expandLabel(style, buf.params(), false);
 332                 if (label_tag_opened)
 333                         closeLabelTag(os, style);
 334                 // Otherwise the label might run together with the text
 335                 os << ' ';
 336         }
 337
 338         pbegin->simpleLyXHTMLOnePar(buf, os, runparams,
 339                         outerFont(distance(paragraphs.begin(), pbegin), paragraphs));
 340         if (main_tag_opened)
 341                 closeTag(os, style);
 342         os << '\n';
 343 }
 344
 345 } // end anonymous namespace
 346
 347
 348 void xhtmlParagraphs(ParagraphList const & paragraphs,
 349                        Buffer const & buf,
 350                        odocstream & os,
 351                        OutputParams const & runparams)
 352 {
 353         ParagraphList::const_iterator par = paragraphs.begin();
 354         ParagraphList::const_iterator pend = paragraphs.end();
 355
 356         while (par != pend) {
 357                 LYXERR0(par->id());
 358                 Layout const & style = par->layout();
 359                 ParagraphList::const_iterator lastpar = par;
 360                 ParagraphList::const_iterator send;
 361
 362                 switch (style.latextype) {
 363                 case LATEX_COMMAND: {
 364                         // The files with which we are working never have more than
 365                         // one paragraph in a command structure.
 366                         makeCommand(buf, os, runparams, paragraphs, par);
 367                         ++par;
 368                         break;
 369                 }
 370                 case LATEX_ENVIRONMENT:
 371                 case LATEX_LIST_ENVIRONMENT:
 372                 case LATEX_ITEM_ENVIRONMENT: {
 373                         send = searchEnvironment(par, pend);
 374                         par = makeEnvironment(buf, os, runparams, paragraphs, par,send);
 375                         break;
 376                 }
 377                 case LATEX_PARAGRAPH:
 378                         send = searchParagraph(par, pend);
 379                         par = makeParagraphs(buf, os, runparams, paragraphs, par,send);
 380                         break;
 381                 case LATEX_BIB_ENVIRONMENT:
 382                         // FIXME
 383                         ++par;
 384                         break;
 385                 }
 386                 // FIXME??
 387                 // makeEnvironment may process more than one paragraphs and bypass pend
 388                 if (distance(lastpar, par) >= distance(lastpar, pend))
 389                         break;
 390         }
 391 }
 392
 393
 394 } // namespace lyx