src/insets/InsetExternal.cpp

   1 /**
   2  * \file InsetExternal.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup Nielsen
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetExternal.h"
  14 #include "insets/ExternalSupport.h"
  15 #include "insets/RenderButton.h"
  16 #include "insets/RenderGraphic.h"
  17 #include "insets/RenderPreview.h"
  18
  19 #include "Buffer.h"
  20 #include "BufferView.h"
  21 #include "Cursor.h"
  22 #include "DispatchResult.h"
  23 #include "Exporter.h"
  24 #include "FuncStatus.h"
  25 #include "FuncRequest.h"
  26 #include "LaTeXFeatures.h"
  27 #include "Lexer.h"
  28 #include "LyX.h" // use_gui
  29 #include "LyXRC.h"
  30 #include "MetricsInfo.h"
  31 #include "OutputParams.h"
  32
  33 #include "frontends/alert.h"
  34 #include "frontends/Application.h"
  35
  36 #include "graphics/PreviewLoader.h"
  37
  38 #include "support/convert.h"
  39 #include "support/debug.h"
  40 #include "support/ExceptionMessage.h"
  41 #include "support/filetools.h"
  42 #include "support/gettext.h"
  43 #include "support/lstrings.h"
  44 #include "support/lyxlib.h"
  45 #include "support/Translator.h"
  46
  47 #include <boost/bind.hpp>
  48
  49 #include <sstream>
  50
  51 using namespace std;
  52 using namespace lyx::support;
  53
  54 namespace {
  55
  56 unsigned int const defaultLyxScale = 100;
  57
  58 string defaultTemplateName;
  59
  60 } // namespace anon
  61
  62
  63 namespace lyx {
  64
  65 namespace Alert = frontend::Alert;
  66
  67 namespace external {
  68
  69 TempName::TempName()
  70 {
  71         FileName const tempname = FileName::tempName("lyxext");
  72         // FIXME: This is unsafe
  73         tempname.removeFile();
  74         // must have an extension for the converter code to work correctly.
  75         tempname_ = FileName(tempname.absFilename() + ".tmp");
  76 }
  77
  78
  79 TempName::TempName(TempName const &)
  80 {
  81         tempname_ = TempName()();
  82 }
  83
  84
  85 TempName::~TempName()
  86 {
  87         tempname_.removeFile();
  88 }
  89
  90
  91 TempName & TempName::operator=(TempName const & other)
  92 {
  93         if (this != &other)
  94                 tempname_ = TempName()();
  95         return *this;
  96 }
  97
  98 } // namespace external
  99
 100
 101 InsetExternalParams::InsetExternalParams()
 102         : display(true),
 103           lyxscale(defaultLyxScale),
 104           draft(false)
 105 {
 106         if (defaultTemplateName.empty()) {
 107                 external::TemplateManager const & etm =
 108                         external::TemplateManager::get();
 109                 templatename_ = etm.getTemplates().begin()->first;
 110         } else
 111                 templatename_ = defaultTemplateName;
 112 }
 113
 114
 115 namespace {
 116
 117 template <typename T>
 118 void clearIfNotFound(T & data, external::TransformID value,
 119                      vector<external::TransformID> const & ids)
 120 {
 121         typedef vector<external::TransformID>::const_iterator
 122                 const_iterator;
 123
 124         const_iterator it  = ids.begin();
 125         const_iterator end = ids.end();
 126         it = find(it, end, value);
 127         if (it == end)
 128                 data = T();
 129 }
 130
 131 } // namespace anon
 132
 133
 134 void InsetExternalParams::settemplate(string const & name)
 135 {
 136         templatename_ = name;
 137
 138         external::TemplateManager const & etm =
 139                 external::TemplateManager::get();
 140         external::Template const * const et = etm.getTemplateByName(name);
 141         if (!et)
 142                 // Be safe. Don't lose data.
 143                 return;
 144
 145         // Ascertain which transforms the template supports.
 146         // Empty all those that it doesn't.
 147         vector<external::TransformID> const & ids = et->transformIds;
 148         clearIfNotFound(clipdata,     external::Clip,   ids);
 149         clearIfNotFound(extradata,    external::Extra,  ids);
 150         clearIfNotFound(resizedata,   external::Resize, ids);
 151         clearIfNotFound(rotationdata, external::Rotate, ids);
 152
 153         //
 154         preview_mode = et->preview_mode;
 155 }
 156
 157
 158 void InsetExternalParams::write(Buffer const & buf, ostream & os) const
 159 {
 160         os << "External\n"
 161            << "\ttemplate " << templatename() << '\n';
 162
 163         if (!filename.empty())
 164                 os << "\tfilename " << filename.outputFilename(buf.filePath()) << '\n';
 165
 166         if (!display)
 167                 os << "\tdisplay false\n";
 168
 169         if (lyxscale != defaultLyxScale)
 170                 os << "\tlyxscale " << convert<string>(lyxscale) << '\n';
 171
 172         if (draft)
 173                 os << "\tdraft\n";
 174
 175         if (!clipdata.bbox.empty())
 176                 os << "\tboundingBox " << clipdata.bbox << '\n';
 177         if (clipdata.clip)
 178                 os << "\tclip\n";
 179
 180         external::ExtraData::const_iterator it  = extradata.begin();
 181         external::ExtraData::const_iterator end = extradata.end();
 182         for (; it != end; ++it) {
 183                 if (!it->second.empty())
 184                         os << "\textra " << it->first << " \""
 185                            << it->second << "\"\n";
 186         }
 187
 188         if (!rotationdata.no_rotation()) {
 189                 os << "\trotateAngle " << rotationdata.adjAngle() << '\n';
 190                 if (rotationdata.origin() != external::RotationData::DEFAULT)
 191                         os << "\trotateOrigin "
 192                            << rotationdata.originString() << '\n';
 193         }
 194
 195         if (!resizedata.no_resize()) {
 196                 double const scl = convert<double>(resizedata.scale);
 197                 if (!float_equal(scl, 0.0, 0.05)) {
 198                         if (!float_equal(scl, 100.0, 0.05))
 199                                 os << "\tscale "
 200                                    << resizedata.scale << '\n';
 201                 } else {
 202                         if (!resizedata.width.zero())
 203                                 os << "\twidth "
 204                                    << resizedata.width.asString() << '\n';
 205                         if (!resizedata.height.zero())
 206                                 os << "\theight "
 207                                    << resizedata.height.asString() << '\n';
 208                 }
 209                 if (resizedata.keepAspectRatio)
 210                         os << "\tkeepAspectRatio\n";
 211         }
 212 }
 213
 214
 215 bool InsetExternalParams::read(Buffer const & buffer, Lexer & lex)
 216 {
 217         enum {
 218                 EX_TEMPLATE = 1,
 219                 EX_FILENAME,
 220                 EX_DISPLAY,
 221                 EX_LYXSCALE,
 222                 EX_DRAFT,
 223                 EX_BOUNDINGBOX,
 224                 EX_CLIP,
 225                 EX_EXTRA,
 226                 EX_HEIGHT,
 227                 EX_KEEPASPECTRATIO,
 228                 EX_ROTATEANGLE,
 229                 EX_ROTATEORIGIN,
 230                 EX_SCALE,
 231                 EX_WIDTH,
 232                 EX_END
 233         };
 234
 235         LexerKeyword external_tags[] = {
 236                 { "\\end_inset",     EX_END },
 237                 { "boundingBox",     EX_BOUNDINGBOX },
 238                 { "clip",            EX_CLIP },
 239                 { "display",         EX_DISPLAY},
 240                 { "draft",           EX_DRAFT},
 241                 { "extra",           EX_EXTRA },
 242                 { "filename",        EX_FILENAME},
 243                 { "height",          EX_HEIGHT },
 244                 { "keepAspectRatio", EX_KEEPASPECTRATIO },
 245                 { "lyxscale",        EX_LYXSCALE},
 246                 { "rotateAngle",     EX_ROTATEANGLE },
 247                 { "rotateOrigin",    EX_ROTATEORIGIN },
 248                 { "scale",           EX_SCALE },
 249                 { "template",        EX_TEMPLATE },
 250                 { "width",           EX_WIDTH }
 251         };
 252
 253         PushPopHelper pph(lex, external_tags);
 254
 255         bool found_end  = false;
 256         bool read_error = false;
 257
 258         while (lex.isOK()) {
 259                 switch (lex.lex()) {
 260                 case EX_TEMPLATE:
 261                         lex.next();
 262                         templatename_ = lex.getString();
 263                         break;
 264
 265                 case EX_FILENAME: {
 266                         lex.eatLine();
 267                         string const name = lex.getString();
 268                         filename.set(name, buffer.filePath());
 269                         break;
 270                 }
 271
 272                 case EX_DISPLAY: {
 273                         lex.next();
 274                         display = lex.getString() != "false";
 275                         break;
 276                 }
 277
 278                 case EX_LYXSCALE:
 279                         lex.next();
 280                         lyxscale = lex.getInteger();
 281                         break;
 282
 283                 case EX_DRAFT:
 284                         draft = true;
 285                         break;
 286
 287                 case EX_BOUNDINGBOX:
 288                         lex.next();
 289                         clipdata.bbox.xl = lex.getInteger();
 290                         lex.next();
 291                         clipdata.bbox.yb = lex.getInteger();
 292                         lex.next();
 293                         clipdata.bbox.xr = lex.getInteger();
 294                         lex.next();
 295                         clipdata.bbox.yt = lex.getInteger();
 296                         break;
 297
 298                 case EX_CLIP:
 299                         clipdata.clip = true;
 300                         break;
 301
 302                 case EX_EXTRA: {
 303                         lex.next();
 304                         string const name = lex.getString();
 305                         lex.next();
 306                         extradata.set(name, lex.getString());
 307                         break;
 308                 }
 309
 310                 case EX_HEIGHT:
 311                         lex.next();
 312                         resizedata.height = Length(lex.getString());
 313                         break;
 314
 315                 case EX_KEEPASPECTRATIO:
 316                         resizedata.keepAspectRatio = true;
 317                         break;
 318
 319                 case EX_ROTATEANGLE:
 320                         lex.next();
 321                         rotationdata.angle = lex.getString();
 322                         break;
 323
 324                 case EX_ROTATEORIGIN:
 325                         lex.next();
 326                         rotationdata.origin(lex.getString());
 327                         break;
 328
 329                 case EX_SCALE:
 330                         lex.next();
 331                         resizedata.scale = lex.getString();
 332                         break;
 333
 334                 case EX_WIDTH:
 335                         lex.next();
 336                         resizedata.width = Length(lex.getString());
 337                         break;
 338
 339                 case EX_END:
 340                         found_end = true;
 341                         break;
 342
 343                 default:
 344                         lex.printError("ExternalInset::read: Wrong tag: $$Token");
 345                         read_error = true;
 346                         break;
 347                 }
 348
 349                 if (found_end || read_error)
 350                         break;
 351         }
 352
 353         if (!found_end)
 354                 lex.printError("ExternalInsetParams::read: Missing \\end_inset.");
 355
 356         // This is a trick to make sure that the data are self-consistent.
 357         settemplate(templatename_);
 358
 359         if (lyxerr.debugging(Debug::EXTERNAL)) {
 360                 lyxerr  << "InsetExternalParams::read:\n";
 361                 write(buffer, lyxerr);
 362         }
 363
 364         return !read_error;
 365 }
 366
 367
 368 InsetExternal::InsetExternal(Buffer & buf)
 369         : renderer_(new RenderButton)
 370 {
 371         Inset::setBuffer(buf);
 372 }
 373
 374
 375 InsetExternal::InsetExternal(InsetExternal const & other)
 376         : Inset(other),
 377           boost::signals::trackable(),
 378           params_(other.params_),
 379           renderer_(other.renderer_->clone(this))
 380 {}
 381
 382
 383 InsetExternal::~InsetExternal()
 384 {
 385         hideDialogs("external", this);
 386 }
 387
 388
 389 void InsetExternal::statusChanged() const
 390 {
 391         updateFrontend();
 392 }
 393
 394
 395 void InsetExternal::doDispatch(Cursor & cur, FuncRequest & cmd)
 396 {
 397         switch (cmd.action) {
 398
 399         case LFUN_INSET_EDIT: {
 400                 InsetExternalParams p =  params();
 401                 if (!cmd.argument().empty())
 402                         string2params(to_utf8(cmd.argument()), buffer(), p);
 403                 external::editExternal(p, buffer());
 404                 break;
 405         }
 406
 407         case LFUN_INSET_MODIFY: {
 408                 InsetExternalParams p;
 409                 string2params(to_utf8(cmd.argument()), buffer(), p);
 410                 setParams(p);
 411                 break;
 412         }
 413
 414         case LFUN_INSET_DIALOG_UPDATE:
 415                 cur.bv().updateDialog("external",
 416                         params2string(params(), cur.bv().buffer()));
 417                 break;
 418
 419         case LFUN_MOUSE_RELEASE:
 420                 if (!cur.selection() && cmd.button() == mouse_button::button1)
 421                         cur.bv().showDialog("external",
 422                                 params2string(params(), cur.bv().buffer()),
 423                                 this);
 424                 break;
 425
 426         default:
 427                 Inset::doDispatch(cur, cmd);
 428         }
 429 }
 430
 431
 432 bool InsetExternal::getStatus(Cursor & cur, FuncRequest const & cmd,
 433                 FuncStatus & flag) const
 434 {
 435         switch (cmd.action) {
 436
 437         case LFUN_INSET_EDIT:
 438         case LFUN_INSET_MODIFY:
 439         case LFUN_INSET_DIALOG_UPDATE:
 440                 flag.setEnabled(true);
 441                 return true;
 442
 443         default:
 444                 return Inset::getStatus(cur, cmd, flag);
 445         }
 446 }
 447
 448
 449 void InsetExternal::edit(Cursor & cur, bool, EntryDirection)
 450 {
 451         cur.bv().showDialog("external",
 452                 params2string(params(), cur.bv().buffer()),
 453                 this);
 454 }
 455
 456
 457 void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 458 {
 459         renderer_->metrics(mi, dim);
 460 }
 461
 462
 463 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 464 {
 465         renderer_->draw(pi, x, y);
 466 }
 467
 468
 469 namespace {
 470
 471 graphics::Params get_grfx_params(InsetExternalParams const & eparams)
 472 {
 473         graphics::Params gparams;
 474
 475         gparams.filename = eparams.filename;
 476         gparams.scale = eparams.lyxscale;
 477         if (eparams.clipdata.clip)
 478                 gparams.bb = eparams.clipdata.bbox;
 479         gparams.angle = convert<double>(eparams.rotationdata.adjAngle());
 480         gparams.display = eparams.display;
 481
 482         return gparams;
 483 }
 484
 485
 486 docstring screenLabel(InsetExternalParams const & params,
 487                             Buffer const & buffer)
 488 {
 489         external::Template const * const ptr =
 490                 external::getTemplatePtr(params);
 491         if (!ptr)
 492                 // FIXME UNICODE
 493                 return bformat((_("External template %1$s is not installed")),
 494                                         from_utf8(params.templatename()));
 495         // FIXME UNICODE
 496         docstring gui = _(ptr->guiName);
 497         return from_utf8(external::doSubstitution(params, buffer,
 498                                 to_utf8(gui), false));
 499 }
 500
 501 } // namespace anon
 502
 503
 504 static bool isPreviewWanted(InsetExternalParams const & params)
 505 {
 506         return params.display && params.filename.isReadableFile();
 507 }
 508
 509
 510 static docstring latexString(InsetExternal const & inset)
 511 {
 512         odocstringstream os;
 513         // We don't need to set runparams.encoding since it is not used by
 514         // latex().
 515         OutputParams runparams(0);
 516         runparams.flavor = OutputParams::LATEX;
 517         inset.latex(os, runparams);
 518         return os.str();
 519 }
 520
 521
 522 static void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
 523                                    InsetExternal const & inset,
 524                                    Buffer const & buffer)
 525 {
 526         InsetExternalParams const & params = inset.params();
 527
 528         if (RenderPreview::status() != LyXRC::PREVIEW_OFF &&
 529             isPreviewWanted(params)) {
 530                 renderer.setAbsFile(params.filename);
 531                 docstring const snippet = latexString(inset);
 532                 renderer.addPreview(snippet, buffer);
 533                 renderer.startLoading(buffer);
 534         }
 535 }
 536
 537
 538 InsetExternalParams const & InsetExternal::params() const
 539 {
 540         return params_;
 541 }
 542
 543
 544 void InsetExternal::setParams(InsetExternalParams const & p)
 545 {
 546         params_ = p;
 547
 548         // Subsequent calls to the InsetExternal::Params default constructor
 549         // will use this.
 550         defaultTemplateName = params_.templatename();
 551
 552         if (!external::getTemplatePtr(params_) || params_.filename.empty()
 553                 || !params_.display
 554                 || !lyxrc.display_graphics
 555                 || params_.preview_mode == PREVIEW_OFF
 556                 || (params_.preview_mode == PREVIEW_INSTANT
 557                     && RenderPreview::status() == LyXRC::PREVIEW_OFF)) {
 558                 RenderButton * button_ptr = renderer_->asButton();
 559                 if (!button_ptr) {
 560                         renderer_.reset(new RenderButton);
 561                         button_ptr = renderer_->asButton();
 562                 }
 563                 button_ptr->update(screenLabel(params_, buffer()), true);
 564                 return;
 565         }
 566
 567         switch (params_.preview_mode) {
 568         case PREVIEW_OFF:
 569                 // Already taken care of above.
 570                 LASSERT(false, return);
 571                 break;
 572         case PREVIEW_INSTANT: {
 573                 RenderMonitoredPreview * preview_ptr = renderer_->asMonitoredPreview();
 574                 renderer_.reset(new RenderMonitoredPreview(this));
 575                 preview_ptr = renderer_->asMonitoredPreview();
 576                 preview_ptr->fileChanged(boost::bind(&InsetExternal::fileChanged, this));
 577                 if (preview_ptr->monitoring())
 578                         preview_ptr->stopMonitoring();
 579                 add_preview_and_start_loading(*preview_ptr, *this, buffer());
 580                 break;
 581         }
 582         case PREVIEW_GRAPHICS: {
 583                 RenderGraphic * graphic_ptr = renderer_->asGraphic();
 584                 if (!graphic_ptr) {
 585                         renderer_.reset(new RenderGraphic(this));
 586                         graphic_ptr = renderer_->asGraphic();
 587                 }
 588                 graphic_ptr->update(get_grfx_params(params_));
 589                 break;
 590         }
 591         }
 592 }
 593
 594
 595 void InsetExternal::fileChanged() const
 596 {
 597         Buffer const * const buffer = updateFrontend();
 598         if (!buffer)
 599                 return;
 600
 601         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 602         LASSERT(ptr, /**/);
 603
 604         ptr->removePreview(*buffer);
 605         add_preview_and_start_loading(*ptr, *this, *buffer);
 606 }
 607
 608
 609 void InsetExternal::write(ostream & os) const
 610 {
 611         params_.write(buffer(), os);
 612 }
 613
 614
 615 void InsetExternal::read(Lexer & lex)
 616 {
 617         InsetExternalParams params;
 618         if (params.read(buffer(), lex))
 619                 setParams(params);
 620 }
 621
 622
 623 int InsetExternal::latex(odocstream & os, OutputParams const & runparams) const
 624 {
 625         if (params_.draft) {
 626                 // FIXME UNICODE
 627                 os << "\\fbox{\\ttfamily{}"
 628                    << from_utf8(params_.filename.outputFilename(buffer().filePath()))
 629                    << "}\n";
 630                 return 1;
 631         }
 632
 633         // "nice" means that the buffer is exported to LaTeX format but not
 634         // run through the LaTeX compiler.
 635         // If we're running through the LaTeX compiler, we should write the
 636         // generated files in the buffer's temporary directory.
 637         bool const external_in_tmpdir = !runparams.nice;
 638         bool const dryrun = runparams.dryrun || runparams.inComment;
 639
 640         // If the template has specified a PDFLaTeX output, then we try and
 641         // use that.
 642         if (runparams.flavor == OutputParams::PDFLATEX) {
 643                 external::Template const * const et_ptr =
 644                         external::getTemplatePtr(params_);
 645                 if (!et_ptr)
 646                         return 0;
 647                 external::Template const & et = *et_ptr;
 648
 649                 external::Template::Formats::const_iterator cit =
 650                         et.formats.find("PDFLaTeX");
 651
 652                 if (cit != et.formats.end()) {
 653                         return external::writeExternal(params_, "PDFLaTeX",
 654                                                        buffer(), os,
 655                                                        *(runparams.exportdata),
 656                                                        external_in_tmpdir,
 657                                                        dryrun);
 658                 }
 659         }
 660
 661         return external::writeExternal(params_, "LaTeX", buffer(), os,
 662                                        *(runparams.exportdata),
 663                                        external_in_tmpdir,
 664                                        dryrun);
 665 }
 666
 667
 668 int InsetExternal::plaintext(odocstream & os,
 669                              OutputParams const & runparams) const
 670 {
 671         os << '\n'; // output external material on a new line
 672         external::writeExternal(params_, "Ascii", buffer(), os,
 673                                 *(runparams.exportdata), false,
 674                                 runparams.dryrun || runparams.inComment);
 675         return PLAINTEXT_NEWLINE;
 676 }
 677
 678
 679 int InsetExternal::docbook(odocstream & os,
 680                            OutputParams const & runparams) const
 681 {
 682         return external::writeExternal(params_, "DocBook", buffer(), os,
 683                                        *(runparams.exportdata), false,
 684                                        runparams.dryrun || runparams.inComment);
 685 }
 686
 687
 688 void InsetExternal::validate(LaTeXFeatures & features) const
 689 {
 690         if (params_.draft)
 691                 return;
 692
 693         external::Template const * const et_ptr =
 694                 external::getTemplatePtr(params_);
 695         if (!et_ptr)
 696                 return;
 697         external::Template const & et = *et_ptr;
 698
 699         string format;
 700         switch (features.runparams().flavor) {
 701         case OutputParams::LATEX:
 702                 format = "LaTeX";
 703                 break;
 704         case OutputParams::PDFLATEX:
 705                 format = "PDFLaTeX";
 706                 break;
 707         case OutputParams::XML:
 708                 format = "DocBook";
 709                 break;
 710         }
 711         external::Template::Formats::const_iterator cit =
 712                 et.formats.find(format);
 713
 714         if (cit == et.formats.end()) {
 715                 // If the template has not specified a PDFLaTeX output,
 716                 // we try the LaTeX format.
 717                 if (format == "PDFLaTeX") {
 718                         cit = et.formats.find("LaTeX");
 719                         if (cit == et.formats.end())
 720                                 return;
 721                 } else
 722                         return;
 723         }
 724
 725         // FIXME: We don't need that always
 726         features.require("lyxdot");
 727
 728         vector<string>::const_iterator it  = cit->second.requirements.begin();
 729         vector<string>::const_iterator end = cit->second.requirements.end();
 730         for (; it != end; ++it)
 731                 features.require(*it);
 732
 733         external::TemplateManager & etm = external::TemplateManager::get();
 734
 735         it  = cit->second.preambleNames.begin();
 736         end = cit->second.preambleNames.end();
 737         for (; it != end; ++it) {
 738                 string const preamble = etm.getPreambleDefByName(*it);
 739                 if (!preamble.empty())
 740                         features.addPreambleSnippet(preamble);
 741         }
 742 }
 743
 744
 745 void InsetExternal::addPreview(graphics::PreviewLoader & ploader) const
 746 {
 747         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 748         if (!ptr)
 749                 return;
 750
 751         if (isPreviewWanted(params())) {
 752                 ptr->setAbsFile(params_.filename);
 753                 docstring const snippet = latexString(*this);
 754                 ptr->addPreview(snippet, ploader);
 755         }
 756 }
 757
 758
 759 docstring InsetExternal::contextMenu(BufferView const &, int, int) const
 760 {
 761         return from_ascii("context-external");
 762 }
 763
 764
 765 void InsetExternal::string2params(string const & in, Buffer const & buffer,
 766         InsetExternalParams & params)
 767 {
 768         params = InsetExternalParams();
 769         if (in.empty())
 770                 return;
 771
 772         istringstream data(in);
 773         Lexer lex;
 774         lex.setStream(data);
 775
 776         string name;
 777         lex >> name;
 778         if (!lex || name != "external") {
 779                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 780                                           "Expected arg 1 to be \"external\"\n");
 781                 return;
 782         }
 783
 784         // This is part of the inset proper that is usually swallowed
 785         // by Text::readInset
 786         string id;
 787         lex >> id;
 788         if (!lex || id != "External") {
 789                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 790                                           "Expected arg 2 to be \"External\"\n");
 791                 return;
 792         }
 793
 794         params.read(buffer, lex);
 795 }
 796
 797
 798 string InsetExternal::params2string(InsetExternalParams const & params,
 799         Buffer const & buffer)
 800 {
 801         ostringstream data;
 802         data << "external" << ' ';
 803         params.write(buffer, data);
 804         data << "\\end_inset\n";
 805         return data.str();
 806 }
 807
 808 } // namespace lyx