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 #include "output_latex.h"
  33
  34 #include "frontends/alert.h"
  35 #include "frontends/Application.h"
  36
  37 #include "graphics/PreviewLoader.h"
  38
  39 #include "support/bind.h"
  40 #include "support/convert.h"
  41 #include "support/debug.h"
  42 #include "support/ExceptionMessage.h"
  43 #include "support/filetools.h"
  44 #include "support/gettext.h"
  45 #include "support/lassert.h"
  46 #include "support/lstrings.h"
  47 #include "support/lyxlib.h"
  48
  49 #include <sstream>
  50 #include <vector>
  51
  52 using namespace std;
  53 using namespace lyx::support;
  54
  55 namespace {
  56
  57 unsigned int const defaultLyxScale = 100;
  58
  59 string defaultTemplateName;
  60
  61 } // namespace anon
  62
  63
  64 namespace lyx {
  65
  66 namespace Alert = frontend::Alert;
  67
  68 namespace external {
  69
  70 TempName::TempName()
  71 {
  72         FileName const tempname = FileName::tempName("lyxext");
  73         // must have an extension for the converter code to work correctly.
  74         tempname_ = FileName(tempname.absFileName() + ".tmp");
  75 }
  76
  77
  78 TempName::TempName(TempName const &)
  79 {
  80         tempname_ = TempName()();
  81 }
  82
  83
  84 TempName::~TempName()
  85 {
  86         tempname_.removeFile();
  87 }
  88
  89
  90 TempName & TempName::operator=(TempName const & other)
  91 {
  92         if (this != &other)
  93                 tempname_ = TempName()();
  94         return *this;
  95 }
  96
  97 } // namespace external
  98
  99
 100 InsetExternalParams::InsetExternalParams()
 101         : display(true),
 102           lyxscale(defaultLyxScale),
 103           draft(false)
 104 {
 105         if (defaultTemplateName.empty()) {
 106                 external::TemplateManager const & etm =
 107                         external::TemplateManager::get();
 108                 if (!etm.getTemplates().empty())
 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         : Inset(buf), renderer_(new RenderButton)
 370 {
 371 }
 372
 373
 374 // Mouse hover is not copied and remains empty
 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         map<BufferView const *, bool>::iterator it = mouse_hover_.begin();
 388         map<BufferView const *, bool>::iterator end = mouse_hover_.end();
 389         for (; it != end; ++it)
 390                 if (it->second)
 391                         it->first->clearLastInset(this);
 392 }
 393
 394
 395 bool InsetExternal::setMouseHover(BufferView const * bv, bool mouse_hover)
 396 {
 397         mouse_hover_[bv] = mouse_hover;
 398         return true;
 399 }
 400
 401
 402 void InsetExternal::statusChanged() const
 403 {
 404         updateFrontend();
 405 }
 406
 407
 408 void InsetExternal::doDispatch(Cursor & cur, FuncRequest & cmd)
 409 {
 410         switch (cmd.action()) {
 411
 412         case LFUN_INSET_EDIT: {
 413                 InsetExternalParams p =  params();
 414                 if (!cmd.argument().empty())
 415                         string2params(to_utf8(cmd.argument()), buffer(), p);
 416                 external::editExternal(p, buffer());
 417                 break;
 418         }
 419
 420         case LFUN_INSET_MODIFY: {
 421                 InsetExternalParams p;
 422                 string2params(to_utf8(cmd.argument()), buffer(), p);
 423                 cur.recordUndo();
 424                 setParams(p);
 425                 break;
 426         }
 427
 428         case LFUN_INSET_DIALOG_UPDATE:
 429                 cur.bv().updateDialog("external",
 430                         params2string(params(), cur.bv().buffer()));
 431                 break;
 432
 433         default:
 434                 Inset::doDispatch(cur, cmd);
 435         }
 436 }
 437
 438
 439 bool InsetExternal::getStatus(Cursor & cur, FuncRequest const & cmd,
 440                 FuncStatus & flag) const
 441 {
 442         switch (cmd.action()) {
 443
 444         case LFUN_INSET_EDIT:
 445         case LFUN_INSET_MODIFY:
 446         case LFUN_INSET_DIALOG_UPDATE:
 447                 flag.setEnabled(true);
 448                 return true;
 449
 450         default:
 451                 return Inset::getStatus(cur, cmd, flag);
 452         }
 453 }
 454
 455
 456 bool InsetExternal::showInsetDialog(BufferView * bv) const
 457 {
 458         bv->showDialog("external", params2string(params(), bv->buffer()),
 459                 const_cast<InsetExternal *>(this));
 460         return true;
 461 }
 462
 463
 464 void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 465 {
 466         renderer_->metrics(mi, dim);
 467 }
 468
 469
 470 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 471 {
 472         if (renderer_->asButton())
 473                 renderer_->setRenderState(mouse_hover_[pi.base.bv]);
 474         renderer_->draw(pi, x, y);
 475 }
 476
 477
 478 namespace {
 479
 480 graphics::Params get_grfx_params(InsetExternalParams const & eparams)
 481 {
 482         graphics::Params gparams;
 483
 484         gparams.filename = eparams.filename;
 485         gparams.scale = eparams.lyxscale;
 486         if (eparams.clipdata.clip)
 487                 gparams.bb = eparams.clipdata.bbox;
 488         gparams.angle = convert<double>(eparams.rotationdata.adjAngle());
 489         gparams.display = eparams.display;
 490
 491         return gparams;
 492 }
 493
 494
 495 docstring screenLabel(InsetExternalParams const & params,
 496                             Buffer const & buffer)
 497 {
 498         external::Template const * const ptr =
 499                 external::getTemplatePtr(params);
 500         if (!ptr)
 501                 // FIXME UNICODE
 502                 return bformat((_("External template %1$s is not installed")),
 503                                         from_utf8(params.templatename()));
 504         // FIXME UNICODE
 505         docstring gui = _(ptr->guiName);
 506         gui += ": ";
 507
 508         if (params.filename.empty())
 509                 gui += "???";
 510         else
 511                 gui += from_utf8(params.filename.relFileName(buffer.filePath()));
 512
 513         return gui;
 514 }
 515
 516 } // namespace anon
 517
 518
 519 static bool isPreviewWanted(InsetExternalParams const & params)
 520 {
 521         return params.display && params.filename.isReadableFile();
 522 }
 523
 524
 525 static docstring latexString(InsetExternal const & inset)
 526 {
 527         TexRow texrow;
 528         odocstringstream ods;
 529         otexstream os(ods, texrow);
 530         // We don't need to set runparams.encoding since it is not used by
 531         // latex().
 532         OutputParams runparams(0);
 533         runparams.flavor = OutputParams::LATEX;
 534         inset.latex(os, runparams);
 535         return ods.str();
 536 }
 537
 538
 539 static void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
 540                                    InsetExternal const & inset,
 541                                    Buffer const & buffer)
 542 {
 543         InsetExternalParams const & params = inset.params();
 544
 545         if (RenderPreview::status() != LyXRC::PREVIEW_OFF &&
 546             isPreviewWanted(params)) {
 547                 renderer.setAbsFile(params.filename);
 548                 docstring const snippet = latexString(inset);
 549                 renderer.addPreview(snippet, buffer);
 550                 renderer.startLoading(buffer);
 551         }
 552 }
 553
 554
 555 InsetExternalParams const & InsetExternal::params() const
 556 {
 557         return params_;
 558 }
 559
 560
 561 void InsetExternal::updatePreview()
 562 {
 563         setParams(params_);
 564 }
 565
 566
 567 void InsetExternal::setParams(InsetExternalParams const & p)
 568 {
 569         params_ = p;
 570
 571         // Subsequent calls to the InsetExternal::Params default constructor
 572         // will use this.
 573         defaultTemplateName = params_.templatename();
 574
 575         if (!external::getTemplatePtr(params_) || params_.filename.empty()
 576                 || !params_.display
 577                 || !lyxrc.display_graphics
 578                 || params_.preview_mode == PREVIEW_OFF
 579                 || (params_.preview_mode == PREVIEW_INSTANT
 580                     && RenderPreview::status() == LyXRC::PREVIEW_OFF)) {
 581                 RenderButton * button_ptr = renderer_->asButton();
 582                 if (!button_ptr) {
 583                         renderer_.reset(new RenderButton);
 584                         button_ptr = renderer_->asButton();
 585                 }
 586                 button_ptr->update(screenLabel(params_, buffer()), true);
 587                 return;
 588         }
 589
 590         switch (params_.preview_mode) {
 591         case PREVIEW_OFF:
 592                 // Already taken care of above.
 593                 LASSERT(false, return);
 594                 break;
 595         case PREVIEW_INSTANT: {
 596                 RenderMonitoredPreview * preview_ptr = renderer_->asMonitoredPreview();
 597                 renderer_.reset(new RenderMonitoredPreview(this));
 598                 preview_ptr = renderer_->asMonitoredPreview();
 599                 preview_ptr->fileChanged(bind(&InsetExternal::fileChanged, this));
 600                 if (preview_ptr->monitoring())
 601                         preview_ptr->stopMonitoring();
 602                 add_preview_and_start_loading(*preview_ptr, *this, buffer());
 603                 break;
 604         }
 605         case PREVIEW_GRAPHICS: {
 606                 RenderGraphic * graphic_ptr = renderer_->asGraphic();
 607                 if (!graphic_ptr) {
 608                         renderer_.reset(new RenderGraphic(this));
 609                         graphic_ptr = renderer_->asGraphic();
 610                 }
 611                 graphic_ptr->update(get_grfx_params(params_));
 612                 break;
 613         }
 614         }
 615 }
 616
 617
 618 void InsetExternal::fileChanged() const
 619 {
 620         Buffer const * const buffer = updateFrontend();
 621         if (!buffer)
 622                 return;
 623
 624         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 625         LASSERT(ptr, /**/);
 626
 627         ptr->removePreview(*buffer);
 628         add_preview_and_start_loading(*ptr, *this, *buffer);
 629 }
 630
 631
 632 void InsetExternal::write(ostream & os) const
 633 {
 634         params_.write(buffer(), os);
 635 }
 636
 637
 638 void InsetExternal::read(Lexer & lex)
 639 {
 640         InsetExternalParams params;
 641         if (params.read(buffer(), lex))
 642                 setParams(params);
 643 }
 644
 645
 646 void InsetExternal::latex(otexstream & os, OutputParams const & runparams) const
 647 {
 648         if (params_.draft) {
 649                 // FIXME UNICODE
 650                 os << "\\fbox{\\ttfamily{}"
 651                    << from_utf8(params_.filename.outputFileName(buffer().filePath()))
 652                    << "}\n";
 653                 return;
 654         }
 655
 656         // "nice" means that the buffer is exported to LaTeX format but not
 657         // run through the LaTeX compiler.
 658         // If we're running through the LaTeX compiler, we should write the
 659         // generated files in the buffer's temporary directory.
 660         bool const external_in_tmpdir = !runparams.nice;
 661         bool const dryrun = runparams.dryrun || runparams.inComment;
 662
 663         // If the template has specified a PDFLaTeX output, then we try and
 664         // use that.
 665         if (runparams.flavor == OutputParams::PDFLATEX) {
 666                 external::Template const * const et_ptr =
 667                         external::getTemplatePtr(params_);
 668                 if (!et_ptr)
 669                         return;
 670                 external::Template const & et = *et_ptr;
 671
 672                 external::Template::Formats::const_iterator cit =
 673                         et.formats.find("PDFLaTeX");
 674
 675                 if (cit != et.formats.end()) {
 676                         int l = external::writeExternal(params_, "PDFLaTeX",
 677                                                         buffer(), os.os(),
 678                                                         *(runparams.exportdata),
 679                                                         external_in_tmpdir,
 680                                                         dryrun);
 681                         os.texrow().newlines(l);
 682                         return;
 683                 }
 684         }
 685
 686         int l = external::writeExternal(params_, "LaTeX", buffer(), os.os(),
 687                                         *(runparams.exportdata),
 688                                         external_in_tmpdir,
 689                                         dryrun);
 690         os.texrow().newlines(l);
 691 }
 692
 693
 694 int InsetExternal::plaintext(odocstream & os,
 695                              OutputParams const & runparams) const
 696 {
 697         os << '\n'; // output external material on a new line
 698         external::writeExternal(params_, "Ascii", buffer(), os,
 699                                 *(runparams.exportdata), false,
 700                                 runparams.dryrun || runparams.inComment);
 701         return PLAINTEXT_NEWLINE;
 702 }
 703
 704
 705 int InsetExternal::docbook(odocstream & os,
 706                            OutputParams const & runparams) const
 707 {
 708         return external::writeExternal(params_, "DocBook", buffer(), os,
 709                                        *(runparams.exportdata), false,
 710                                        runparams.dryrun || runparams.inComment);
 711 }
 712
 713
 714 docstring InsetExternal::xhtml(XHTMLStream  & /*xs*/,
 715                         OutputParams const & /*rp*/) const
 716 {
 717 //      external::writeExternal(params_, "XHTML", buffer(), os,
 718 //                                     *(runparams.exportdata), false,
 719 //                                     runparams.dryrun || runparams.inComment);
 720         return docstring();
 721 }
 722
 723
 724 void InsetExternal::validate(LaTeXFeatures & features) const
 725 {
 726         if (params_.draft)
 727                 return;
 728
 729         external::Template const * const et_ptr =
 730                 external::getTemplatePtr(params_);
 731         if (!et_ptr)
 732                 return;
 733         external::Template const & et = *et_ptr;
 734
 735         string format;
 736         switch (features.runparams().flavor) {
 737         case OutputParams::LATEX:
 738         case OutputParams::DVILUATEX:
 739                 format = "LaTeX";
 740                 break;
 741         case OutputParams::LUATEX:
 742         case OutputParams::PDFLATEX:
 743         case OutputParams::XETEX:
 744                 format = "PDFLaTeX";
 745                 break;
 746         case OutputParams::XML:
 747                 format = "DocBook";
 748                 break;
 749         case OutputParams::HTML:
 750                 format = "html";
 751                 break;
 752         case OutputParams::TEXT:
 753                 format = "text";
 754                 break;
 755         }
 756         external::Template::Formats::const_iterator cit =
 757                 et.formats.find(format);
 758
 759         if (cit == et.formats.end()) {
 760                 // If the template has not specified a PDFLaTeX output,
 761                 // we try the LaTeX format.
 762                 if (format == "PDFLaTeX") {
 763                         cit = et.formats.find("LaTeX");
 764                         if (cit == et.formats.end())
 765                                 return;
 766                 } else
 767                         return;
 768         }
 769
 770         // FIXME: We don't need that always
 771         features.require("lyxdot");
 772
 773         vector<string>::const_iterator it  = cit->second.requirements.begin();
 774         vector<string>::const_iterator end = cit->second.requirements.end();
 775         for (; it != end; ++it)
 776                 features.require(*it);
 777
 778         external::TemplateManager & etm = external::TemplateManager::get();
 779
 780         it  = cit->second.preambleNames.begin();
 781         end = cit->second.preambleNames.end();
 782         for (; it != end; ++it) {
 783                 string const preamble = etm.getPreambleDefByName(*it);
 784                 if (!preamble.empty())
 785                         features.addPreambleSnippet(preamble);
 786         }
 787 }
 788
 789
 790 void InsetExternal::addPreview(DocIterator const & /*inset_pos*/,
 791         graphics::PreviewLoader & ploader) const
 792 {
 793         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 794         if (!ptr)
 795                 return;
 796
 797         if (isPreviewWanted(params())) {
 798                 ptr->setAbsFile(params_.filename);
 799                 docstring const snippet = latexString(*this);
 800                 ptr->addPreview(snippet, ploader);
 801         }
 802 }
 803
 804
 805 string InsetExternal::contextMenuName() const
 806 {
 807         return "context-external";
 808 }
 809
 810
 811 void InsetExternal::string2params(string const & in, Buffer const & buffer,
 812         InsetExternalParams & params)
 813 {
 814         params = InsetExternalParams();
 815         if (in.empty())
 816                 return;
 817
 818         istringstream data(in);
 819         Lexer lex;
 820         lex.setStream(data);
 821
 822         string name;
 823         lex >> name;
 824         if (!lex || name != "external") {
 825                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 826                                           "Expected arg 1 to be \"external\"\n");
 827                 return;
 828         }
 829
 830         // This is part of the inset proper that is usually swallowed
 831         // by Text::readInset
 832         string id;
 833         lex >> id;
 834         if (!lex || id != "External") {
 835                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 836                                           "Expected arg 2 to be \"External\"\n");
 837                 return;
 838         }
 839
 840         params.read(buffer, lex);
 841 }
 842
 843
 844 string InsetExternal::params2string(InsetExternalParams const & params,
 845         Buffer const & buffer)
 846 {
 847         ostringstream data;
 848         data << "external" << ' ';
 849         params.write(buffer, data);
 850         data << "\\end_inset\n";
 851         return data.str();
 852 }
 853
 854 } // namespace lyx