src/insets/InsetListings.cpp

   1 /**
   2  * \file InsetListings.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Bo Peng
   7  * \author Jürgen Spitzmüller
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "InsetListings.h"
  15
  16 #include "Buffer.h"
  17 #include "BufferView.h"
  18 #include "BufferParams.h"
  19 #include "Counters.h"
  20 #include "Cursor.h"
  21 #include "DispatchResult.h"
  22 #include "Encoding.h"
  23 #include "FuncRequest.h"
  24 #include "FuncStatus.h"
  25 #include "InsetCaption.h"
  26 #include "Language.h"
  27 #include "MetricsInfo.h"
  28 #include "output_latex.h"
  29 #include "TextClass.h"
  30
  31 #include "support/debug.h"
  32 #include "support/docstream.h"
  33 #include "support/gettext.h"
  34 #include "support/lstrings.h"
  35 #include "support/lassert.h"
  36
  37 #include "frontends/alert.h"
  38 #include "frontends/Application.h"
  39
  40 #include <boost/regex.hpp>
  41
  42 #include <sstream>
  43
  44 using namespace std;
  45 using namespace lyx::support;
  46
  47 namespace lyx {
  48
  49 using boost::regex;
  50
  51 char const lstinline_delimiters[] =
  52         "!*()-=+|;:'\"`,<.>/?QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm";
  53
  54 InsetListings::InsetListings(Buffer const & buf, InsetListingsParams const & par)
  55         : InsetCollapsable(buf)
  56 {
  57         status_ = par.status();
  58 }
  59
  60
  61 InsetListings::~InsetListings()
  62 {
  63         hideDialogs("listings", this);
  64 }
  65
  66
  67 Inset::DisplayType InsetListings::display() const
  68 {
  69         return params().isInline() || params().isFloat() ? Inline : AlignLeft;
  70 }
  71
  72
  73 void InsetListings::updateLabels(ParIterator const & it)
  74 {
  75         Counters & cnts = buffer().masterBuffer()->params().documentClass().counters();
  76         string const saveflt = cnts.current_float();
  77
  78         // Tell to captions what the current float is
  79         cnts.current_float("listing");
  80
  81         InsetCollapsable::updateLabels(it);
  82
  83         //reset afterwards
  84         cnts.current_float(saveflt);
  85 }
  86
  87
  88 void InsetListings::write(ostream & os) const
  89 {
  90         os << "listings" << "\n";
  91         InsetListingsParams const & par = params();
  92         // parameter string is encoded to be a valid lyx token.
  93         string opt = par.encodedString();
  94         if (!opt.empty())
  95                 os << "lstparams \"" << opt << "\"\n";
  96         if (par.isInline())
  97                 os << "inline true\n";
  98         else
  99                 os << "inline false\n";
 100         InsetCollapsable::write(os);
 101 }
 102
 103
 104 void InsetListings::read(Lexer & lex)
 105 {
 106         while (lex.isOK()) {
 107                 lex.next();
 108                 string token = lex.getString();
 109                 if (token == "lstparams") {
 110                         lex.next();
 111                         string const value = lex.getString();
 112                         params().fromEncodedString(value);
 113                 } else if (token == "inline") {
 114                         lex.next();
 115                         params().setInline(lex.getBool());
 116                 } else {
 117                         // no special option, push back 'status' etc
 118                         lex.pushToken(token);
 119                         break;
 120                 }
 121         }
 122         InsetCollapsable::read(lex);
 123 }
 124
 125
 126 docstring InsetListings::editMessage() const
 127 {
 128         return _("Opened Listing Inset");
 129 }
 130
 131
 132 int InsetListings::latex(odocstream & os, OutputParams const & runparams) const
 133 {
 134         string param_string = params().params();
 135         // NOTE: I use {} to quote text, which is an experimental feature
 136         // of the listings package (see page 25 of the manual)
 137         int lines = 0;
 138         bool isInline = params().isInline();
 139         // get the paragraphs. We can not output them directly to given odocstream
 140         // because we can not yet determine the delimiter character of \lstinline
 141         docstring code;
 142         docstring uncodable;
 143         ParagraphList::const_iterator par = paragraphs().begin();
 144         ParagraphList::const_iterator end = paragraphs().end();
 145
 146         bool encoding_switched = false;
 147         Encoding const * const save_enc = runparams.encoding;
 148
 149         if (!runparams.encoding->hasFixedWidth()) {
 150                 // We need to switch to a singlebyte encoding, since the listings
 151                 // package cannot deal with multiple-byte-encoded glyphs
 152                 Language const * const outer_language =
 153                         (runparams.local_font != 0) ?
 154                                 runparams.local_font->language()
 155                                 : buffer().params().language;
 156                 // We try if there's a singlebyte encoding for the current
 157                 // language; if not, fall back to latin1.
 158                 Encoding const * const lstenc =
 159                         (outer_language->encoding()->hasFixedWidth()) ?
 160                                 outer_language->encoding()
 161                                 : encodings.fromLyXName("iso8859-1");
 162                 pair<bool, int> const c = switchEncoding(os, buffer().params(),
 163                                 runparams, *lstenc, true);
 164                 runparams.encoding = lstenc;
 165                 encoding_switched = true;
 166         }
 167
 168         while (par != end) {
 169                 pos_type siz = par->size();
 170                 bool captionline = false;
 171                 for (pos_type i = 0; i < siz; ++i) {
 172                         if (i == 0 && par->isInset(i) && i + 1 == siz)
 173                                 captionline = true;
 174                         // ignore all struck out text and (caption) insets
 175                         if (par->isDeleted(i) || par->isInset(i))
 176                                 continue;
 177                         char_type c = par->getChar(i);
 178                         // we can only output characters covered by the current
 179                         // encoding!
 180                         try {
 181                                 if (runparams.encoding->latexChar(c) == docstring(1, c))
 182                                         code += c;
 183                                 else if (runparams.dryrun) {
 184                                         code += "<" + _("LyX Warning: ")
 185                                            + _("uncodable character") + " '";
 186                                         code += docstring(1, c);
 187                                         code += "'>";
 188                                 } else
 189                                         uncodable += c;
 190                         } catch (EncodingException & /* e */) {
 191                                 if (runparams.dryrun) {
 192                                         code += "<" + _("LyX Warning: ")
 193                                            + _("uncodable character") + " '";
 194                                         code += docstring(1, c);
 195                                         code += "'>";
 196                                 } else
 197                                         uncodable += c;
 198                         }
 199                 }
 200                 ++par;
 201                 // for the inline case, if there are multiple paragraphs
 202                 // they are simply joined. Otherwise, expect latex errors.
 203                 if (par != end && !isInline && !captionline) {
 204                         code += "\n";
 205                         ++lines;
 206                 }
 207         }
 208         if (isInline) {
 209                 char const * delimiter = lstinline_delimiters;
 210                 for (; delimiter != '\0'; ++delimiter)
 211                         if (!contains(code, *delimiter))
 212                                 break;
 213                 // This code piece contains all possible special character? !!!
 214                 // Replace ! with a warning message and use ! as delimiter.
 215                 if (*delimiter == '\0') {
 216                         docstring delim_error = "<" + _("LyX Warning: ")
 217                                 + _("no more lstline delimiters available") + ">";
 218                         code = subst(code, from_ascii("!"), delim_error);
 219                         delimiter = lstinline_delimiters;
 220                         if (!runparams.dryrun) {
 221                                 // FIXME: warning should be passed to the error dialog
 222                                 frontend::Alert::warning(_("Running out of delimiters"),
 223                                 _("For inline program listings, one character must be reserved\n"
 224                                   "as a delimiter. One of the listings, however, uses all available\n"
 225                                   "characters, so none is left for delimiting purposes.\n"
 226                                   "For the time being, I have replaced '!' by a warning, but you\n"
 227                                   "must investigate!"));
 228                         }
 229                 }
 230                 if (param_string.empty())
 231                         os << "\\lstinline" << *delimiter;
 232                 else
 233                         os << "\\lstinline[" << from_utf8(param_string) << "]" << *delimiter;
 234                 os << code
 235                    << *delimiter;
 236         } else {
 237                 OutputParams rp = runparams;
 238                 rp.moving_arg = true;
 239                 docstring const caption = getCaption(rp);
 240                 if (param_string.empty() && caption.empty())
 241                         os << "\n\\begin{lstlisting}\n";
 242                 else {
 243                         os << "\n\\begin{lstlisting}[";
 244                         if (!caption.empty()) {
 245                                 os << "caption={" << caption << '}';
 246                                 if (!param_string.empty())
 247                                         os << ',';
 248                         }
 249                         os << from_utf8(param_string) << "]\n";
 250                 }
 251                 lines += 2;
 252                 os << code << "\n\\end{lstlisting}\n";
 253                 lines += 2;
 254         }
 255
 256         if (encoding_switched){
 257                 // Switch back
 258                 pair<bool, int> const c = switchEncoding(os, buffer().params(),
 259                                 runparams, *save_enc, true);
 260                 runparams.encoding = save_enc;
 261         }
 262
 263         if (!uncodable.empty()) {
 264                 // issue a warning about omitted characters
 265                 // FIXME: should be passed to the error dialog
 266                 frontend::Alert::warning(_("Uncodable characters in listings inset"),
 267                         bformat(_("The following characters in one of the program listings are\n"
 268                                   "not representable in the current encoding and have been omitted:\n%1$s."),
 269                         uncodable));
 270         }
 271
 272         return lines;
 273 }
 274
 275
 276 docstring InsetListings::contextMenu(BufferView const &, int, int) const
 277 {
 278         return from_ascii("context-listings");
 279 }
 280
 281
 282 void InsetListings::doDispatch(Cursor & cur, FuncRequest & cmd)
 283 {
 284         switch (cmd.action) {
 285
 286         case LFUN_INSET_MODIFY: {
 287                 InsetListings::string2params(to_utf8(cmd.argument()), params());
 288                 break;
 289         }
 290
 291         case LFUN_INSET_DIALOG_UPDATE:
 292                 cur.bv().updateDialog("listings", params2string(params()));
 293                 break;
 294
 295         case LFUN_TAB_INSERT: {
 296                 bool const multi_par_selection = cur.selection() &&
 297                         cur.selBegin().pit() != cur.selEnd().pit();
 298                 if (multi_par_selection) {
 299                         // If there is a multi-paragraph selection, a tab is inserted
 300                         // at the beginning of each paragraph.
 301                         cur.recordUndoSelection();
 302                         pit_type const pit_end = cur.selEnd().pit();
 303                         for (pit_type pit = cur.selBegin().pit(); pit <= pit_end; pit++) {
 304                                 paragraphs()[pit].insertChar(0, '\t',
 305                                         buffer().params().trackChanges);
 306                                 // Update the selection pos to make sure the selection does not
 307                                 // change as the inserted tab will increase the logical pos.
 308                                 if (cur.anchor_.pit() == pit)
 309                                         cur.anchor_.forwardPos();
 310                                 if (cur.pit() == pit)
 311                                         cur.forwardPos();
 312                         }
 313                         cur.finishUndo();
 314                 } else {
 315                         // Maybe we shouldn't allow tabs within a line, because they
 316                         // are not (yet) aligned as one might do expect.
 317                         FuncRequest cmd(LFUN_SELF_INSERT, from_ascii("\t"));
 318                         dispatch(cur, cmd);
 319                 }
 320                 break;
 321         }
 322
 323         case LFUN_TAB_DELETE:
 324                 if (cur.selection()) {
 325                         // If there is a selection, a tab (if present) is removed from
 326                         // the beginning of each paragraph.
 327                         cur.recordUndoSelection();
 328                         pit_type const pit_end = cur.selEnd().pit();
 329                         for (pit_type pit = cur.selBegin().pit(); pit <= pit_end; pit++) {
 330                                 Paragraph & par = paragraphs()[pit];
 331                                 if (par.getChar(0) == '\t') {
 332                                         if (cur.pit() == pit)
 333                                                 cur.posBackward();
 334                                         if (cur.anchor_.pit() == pit && cur.anchor_.pos() > 0 )
 335                                                 cur.anchor_.backwardPos();
 336
 337                                         par.eraseChar(0, buffer().params().trackChanges);
 338                                 } else
 339                                         // If no tab was present, try to remove up to four spaces.
 340                                         for (int n_spaces = 0;
 341                                                 par.getChar(0) == ' ' && n_spaces < 4; ++n_spaces) {
 342                                                         if (cur.pit() == pit)
 343                                                                 cur.posBackward();
 344                                                         if (cur.anchor_.pit() == pit && cur.anchor_.pos() > 0 )
 345                                                                 cur.anchor_.backwardPos();
 346
 347                                                         par.eraseChar(0, buffer().params().trackChanges);
 348                                         }
 349                         }
 350                         cur.finishUndo();
 351                 } else {
 352                         // If there is no selection, try to remove a tab or some spaces
 353                         // before the position of the cursor.
 354                         Paragraph & par = paragraphs()[cur.pit()];
 355                         pos_type const pos = cur.pos();
 356
 357                         if (pos == 0)
 358                                 break;
 359
 360                         char_type const c = par.getChar(pos - 1);
 361                         cur.recordUndo();
 362                         if (c == '\t') {
 363                                 cur.posBackward();
 364                                 par.eraseChar(cur.pos(), buffer().params().trackChanges);
 365                         } else
 366                                 for (int n_spaces = 0; cur.pos() > 0
 367                                         && par.getChar(cur.pos() - 1) == ' ' && n_spaces < 4;
 368                                         ++n_spaces) {
 369                                                 cur.posBackward();
 370                                                 par.eraseChar(cur.pos(), buffer().params().trackChanges);
 371                                 }
 372                                 cur.finishUndo();
 373                 }
 374                 break;
 375         default:
 376                 InsetCollapsable::doDispatch(cur, cmd);
 377                 break;
 378         }
 379 }
 380
 381
 382 bool InsetListings::getStatus(Cursor & cur, FuncRequest const & cmd,
 383         FuncStatus & status) const
 384 {
 385         switch (cmd.action) {
 386                 case LFUN_INSET_MODIFY:
 387                 case LFUN_INSET_DIALOG_UPDATE:
 388                         status.setEnabled(true);
 389                         return true;
 390                 case LFUN_CAPTION_INSERT:
 391                         status.setEnabled(!params().isInline());
 392                         return true;
 393                         case LFUN_TAB_INSERT:
 394                         case LFUN_TAB_DELETE:
 395                                 status.setEnabled(true);
 396                                 return true;
 397                 default:
 398                         return InsetCollapsable::getStatus(cur, cmd, status);
 399         }
 400 }
 401
 402
 403 docstring const InsetListings::buttonLabel(BufferView const & bv) const
 404 {
 405         // FIXME UNICODE
 406         if (decoration() == InsetLayout::CLASSIC)
 407                 return isOpen(bv) ? _("Listing") : getNewLabel(_("Listing"));
 408         else
 409                 return getNewLabel(_("Listing"));
 410 }
 411
 412
 413 void InsetListings::validate(LaTeXFeatures & features) const
 414 {
 415         features.require("listings");
 416         string param_string = params().params();
 417         if (param_string.find("\\color") != string::npos)
 418                 features.require("color");
 419         InsetCollapsable::validate(features);
 420 }
 421
 422
 423 bool InsetListings::showInsetDialog(BufferView * bv) const
 424 {
 425         bv->showDialog("listings", params2string(params()),
 426                 const_cast<InsetListings *>(this));
 427         return true;
 428 }
 429
 430
 431 docstring InsetListings::getCaption(OutputParams const & runparams) const
 432 {
 433         if (paragraphs().empty())
 434                 return docstring();
 435
 436         InsetCaption const * ins = getCaptionInset();
 437         if (ins == 0)
 438                 return docstring();
 439
 440         odocstringstream ods;
 441         ins->getOptArg(ods, runparams);
 442         ins->getArgument(ods, runparams);
 443         // the caption may contain \label{} but the listings
 444         // package prefer caption={}, label={}
 445         docstring cap = ods.str();
 446         if (!contains(to_utf8(cap), "\\label{"))
 447                 return cap;
 448         // convert from
 449         //     blah1\label{blah2} blah3
 450         // to
 451         //     blah1 blah3},label={blah2
 452         // to form options
 453         //     caption={blah1 blah3},label={blah2}
 454         //
 455         // NOTE that } is not allowed in blah2.
 456         regex const reg("(.*)\\\\label\\{(.*?)\\}(.*)");
 457         string const new_cap("\\1\\3},label={\\2");
 458         return from_utf8(regex_replace(to_utf8(cap), reg, new_cap));
 459 }
 460
 461
 462 void InsetListings::string2params(string const & in,
 463                                    InsetListingsParams & params)
 464 {
 465         params = InsetListingsParams();
 466         if (in.empty())
 467                 return;
 468         istringstream data(in);
 469         Lexer lex;
 470         lex.setStream(data);
 471         // discard "listings", which is only used to determine inset
 472         lex.next();
 473         params.read(lex);
 474 }
 475
 476
 477 string InsetListings::params2string(InsetListingsParams const & params)
 478 {
 479         ostringstream data;
 480         data << "listings" << ' ';
 481         params.write(data);
 482         return data.str();
 483 }
 484
 485
 486 } // namespace lyx