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 #include "TocBackend.h"
  34
  35 #include "frontends/alert.h"
  36 #include "frontends/Application.h"
  37
  38 #include "graphics/PreviewLoader.h"
  39
  40 #include "support/bind.h"
  41 #include "support/convert.h"
  42 #include "support/debug.h"
  43 #include "support/ExceptionMessage.h"
  44 #include "support/filetools.h"
  45 #include "support/gettext.h"
  46 #include "support/lassert.h"
  47 #include "support/lstrings.h"
  48 #include "support/lyxlib.h"
  49 #include "support/TempFile.h"
  50
  51 #include <sstream>
  52 #include <vector>
  53
  54 using namespace std;
  55 using namespace lyx::support;
  56
  57 namespace {
  58
  59 unsigned int const defaultLyxScale = 100;
  60
  61 string defaultTemplateName;
  62
  63 } // namespace anon
  64
  65
  66 namespace lyx {
  67
  68 namespace Alert = frontend::Alert;
  69
  70 namespace external {
  71
  72 TempName::TempName() : tempfile_(new support::TempFile("lyxextXXXXXX.tmp"))
  73 {
  74         // must have an extension for the converter code to work correctly.
  75 }
  76
  77
  78 TempName::TempName(TempName const & that) : tempfile_(0)
  79 {
  80         *this = that;
  81 }
  82
  83
  84 TempName::~TempName()
  85 {
  86         delete tempfile_;
  87 }
  88
  89
  90 TempName & TempName::operator=(TempName const & other)
  91 {
  92         if (this != &other) {
  93                 delete tempfile_;
  94                 tempfile_ = new support::TempFile("lyxextXXXXXX.tmp");
  95         }
  96         return *this;
  97 }
  98
  99
 100 support::FileName TempName::operator()() const
 101 {
 102         return tempfile_->name();
 103 }
 104
 105 } // namespace external
 106
 107
 108 InsetExternalParams::InsetExternalParams()
 109         : display(true),
 110           lyxscale(defaultLyxScale),
 111           draft(false)
 112 {
 113         if (defaultTemplateName.empty()) {
 114                 external::TemplateManager const & etm =
 115                         external::TemplateManager::get();
 116                 if (!etm.getTemplates().empty())
 117                         templatename_ = etm.getTemplates().begin()->first;
 118         } else
 119                 templatename_ = defaultTemplateName;
 120 }
 121
 122
 123 namespace {
 124
 125 template <typename T>
 126 void clearIfNotFound(T & data, external::TransformID value,
 127                      vector<external::TransformID> const & ids)
 128 {
 129         typedef vector<external::TransformID>::const_iterator
 130                 const_iterator;
 131
 132         const_iterator it  = ids.begin();
 133         const_iterator end = ids.end();
 134         it = find(it, end, value);
 135         if (it == end)
 136                 data = T();
 137 }
 138
 139 } // namespace anon
 140
 141
 142 void InsetExternalParams::settemplate(string const & name)
 143 {
 144         templatename_ = name;
 145
 146         external::TemplateManager const & etm =
 147                 external::TemplateManager::get();
 148         external::Template const * const et = etm.getTemplateByName(name);
 149         if (!et)
 150                 // Be safe. Don't lose data.
 151                 return;
 152
 153         // Ascertain which transforms the template supports.
 154         // Empty all those that it doesn't.
 155         vector<external::TransformID> const & ids = et->transformIds;
 156         clearIfNotFound(clipdata,     external::Clip,   ids);
 157         clearIfNotFound(extradata,    external::Extra,  ids);
 158         clearIfNotFound(resizedata,   external::Resize, ids);
 159         clearIfNotFound(rotationdata, external::Rotate, ids);
 160
 161         //
 162         preview_mode = et->preview_mode;
 163 }
 164
 165
 166 void InsetExternalParams::write(Buffer const & buf, ostream & os) const
 167 {
 168         os << "External\n"
 169            << "\ttemplate " << templatename() << '\n';
 170
 171         if (!filename.empty())
 172                 os << "\tfilename " << filename.outputFileName(buf.filePath()) << '\n';
 173
 174         if (!display)
 175                 os << "\tdisplay false\n";
 176
 177         if (lyxscale != defaultLyxScale)
 178                 os << "\tlyxscale " << convert<string>(lyxscale) << '\n';
 179
 180         if (draft)
 181                 os << "\tdraft\n";
 182
 183         if (!clipdata.bbox.empty())
 184                 os << "\tboundingBox " << clipdata.bbox << '\n';
 185         if (clipdata.clip)
 186                 os << "\tclip\n";
 187
 188         external::ExtraData::const_iterator it  = extradata.begin();
 189         external::ExtraData::const_iterator end = extradata.end();
 190         for (; it != end; ++it) {
 191                 if (!it->second.empty())
 192                         os << "\textra " << it->first << " \""
 193                            << it->second << "\"\n";
 194         }
 195
 196         if (!rotationdata.no_rotation()) {
 197                 os << "\trotateAngle " << rotationdata.adjAngle() << '\n';
 198                 if (rotationdata.origin() != external::RotationData::DEFAULT)
 199                         os << "\trotateOrigin "
 200                            << rotationdata.originString() << '\n';
 201         }
 202
 203         if (!resizedata.no_resize()) {
 204                 double const scl = convert<double>(resizedata.scale);
 205                 if (!float_equal(scl, 0.0, 0.05)) {
 206                         if (!float_equal(scl, 100.0, 0.05))
 207                                 os << "\tscale "
 208                                    << resizedata.scale << '\n';
 209                 } else {
 210                         if (!resizedata.width.zero())
 211                                 os << "\twidth "
 212                                    << resizedata.width.asString() << '\n';
 213                         if (!resizedata.height.zero())
 214                                 os << "\theight "
 215                                    << resizedata.height.asString() << '\n';
 216                 }
 217                 if (resizedata.keepAspectRatio)
 218                         os << "\tkeepAspectRatio\n";
 219         }
 220 }
 221
 222
 223 bool InsetExternalParams::read(Buffer const & buffer, Lexer & lex)
 224 {
 225         enum {
 226                 EX_TEMPLATE = 1,
 227                 EX_FILENAME,
 228                 EX_DISPLAY,
 229                 EX_LYXSCALE,
 230                 EX_DRAFT,
 231                 EX_BOUNDINGBOX,
 232                 EX_CLIP,
 233                 EX_EXTRA,
 234                 EX_HEIGHT,
 235                 EX_KEEPASPECTRATIO,
 236                 EX_ROTATEANGLE,
 237                 EX_ROTATEORIGIN,
 238                 EX_SCALE,
 239                 EX_WIDTH,
 240                 EX_END
 241         };
 242
 243         LexerKeyword external_tags[] = {
 244                 { "\\end_inset",     EX_END },
 245                 { "boundingBox",     EX_BOUNDINGBOX },
 246                 { "clip",            EX_CLIP },
 247                 { "display",         EX_DISPLAY},
 248                 { "draft",           EX_DRAFT},
 249                 { "extra",           EX_EXTRA },
 250                 { "filename",        EX_FILENAME},
 251                 { "height",          EX_HEIGHT },
 252                 { "keepAspectRatio", EX_KEEPASPECTRATIO },
 253                 { "lyxscale",        EX_LYXSCALE},
 254                 { "rotateAngle",     EX_ROTATEANGLE },
 255                 { "rotateOrigin",    EX_ROTATEORIGIN },
 256                 { "scale",           EX_SCALE },
 257                 { "template",        EX_TEMPLATE },
 258                 { "width",           EX_WIDTH }
 259         };
 260
 261         PushPopHelper pph(lex, external_tags);
 262
 263         bool found_end  = false;
 264         bool read_error = false;
 265
 266         while (lex.isOK()) {
 267                 switch (lex.lex()) {
 268                 case EX_TEMPLATE:
 269                         lex.next();
 270                         templatename_ = lex.getString();
 271                         break;
 272
 273                 case EX_FILENAME: {
 274                         lex.eatLine();
 275                         string const name = lex.getString();
 276                         filename.set(name, buffer.originFilePath());
 277                         break;
 278                 }
 279
 280                 case EX_DISPLAY: {
 281                         lex.next();
 282                         display = lex.getString() != "false";
 283                         break;
 284                 }
 285
 286                 case EX_LYXSCALE:
 287                         lex.next();
 288                         lyxscale = lex.getInteger();
 289                         break;
 290
 291                 case EX_DRAFT:
 292                         draft = true;
 293                         break;
 294
 295                 case EX_BOUNDINGBOX:
 296                         lex.next();
 297                         clipdata.bbox.xl = Length(lex.getString());
 298                         lex.next();
 299                         clipdata.bbox.yb = Length(lex.getString());
 300                         lex.next();
 301                         clipdata.bbox.xr = Length(lex.getString());
 302                         lex.next();
 303                         clipdata.bbox.yt = Length(lex.getString());
 304                         break;
 305
 306                 case EX_CLIP:
 307                         clipdata.clip = true;
 308                         break;
 309
 310                 case EX_EXTRA: {
 311                         lex.next();
 312                         string const name = lex.getString();
 313                         lex.next();
 314                         extradata.set(name, lex.getString());
 315                         break;
 316                 }
 317
 318                 case EX_HEIGHT:
 319                         lex.next();
 320                         resizedata.height = Length(lex.getString());
 321                         break;
 322
 323                 case EX_KEEPASPECTRATIO:
 324                         resizedata.keepAspectRatio = true;
 325                         break;
 326
 327                 case EX_ROTATEANGLE:
 328                         lex.next();
 329                         rotationdata.angle = lex.getString();
 330                         break;
 331
 332                 case EX_ROTATEORIGIN:
 333                         lex.next();
 334                         rotationdata.origin(lex.getString());
 335                         break;
 336
 337                 case EX_SCALE:
 338                         lex.next();
 339                         resizedata.scale = lex.getString();
 340                         break;
 341
 342                 case EX_WIDTH:
 343                         lex.next();
 344                         resizedata.width = Length(lex.getString());
 345                         break;
 346
 347                 case EX_END:
 348                         found_end = true;
 349                         break;
 350
 351                 default:
 352                         lex.printError("ExternalInset::read: Wrong tag: $$Token");
 353                         read_error = true;
 354                         break;
 355                 }
 356
 357                 if (found_end || read_error)
 358                         break;
 359         }
 360
 361         if (!found_end)
 362                 lex.printError("ExternalInsetParams::read: Missing \\end_inset.");
 363
 364         // This is a trick to make sure that the data are self-consistent.
 365         settemplate(templatename_);
 366
 367         if (lyxerr.debugging(Debug::EXTERNAL)) {
 368                 lyxerr  << "InsetExternalParams::read:\n";
 369                 write(buffer, lyxerr);
 370         }
 371
 372         return !read_error;
 373 }
 374
 375
 376 namespace {
 377
 378 docstring screenLabel(InsetExternalParams const & params,
 379                             Buffer const & buffer)
 380 {
 381         external::Template const * const ptr =
 382                 external::getTemplatePtr(params);
 383         if (!ptr)
 384                 // FIXME UNICODE
 385                 return bformat((_("External template %1$s is not installed")),
 386                                         from_utf8(params.templatename()));
 387         // FIXME UNICODE
 388         docstring gui = _(ptr->guiName);
 389         gui += ": ";
 390
 391         if (params.filename.empty())
 392                 gui += "???";
 393         else
 394                 gui += from_utf8(params.filename.relFileName(buffer.filePath()));
 395
 396         return gui;
 397 }
 398
 399 } // namespace anon
 400
 401
 402
 403 InsetExternal::InsetExternal(Buffer * buf)
 404         : Inset(buf), renderer_(new RenderButton)
 405 {
 406 }
 407
 408
 409 // Mouse hover is not copied and remains empty
 410 InsetExternal::InsetExternal(InsetExternal const & other)
 411         : Inset(other),
 412           boost::signals::trackable(),
 413           params_(other.params_),
 414           renderer_(other.renderer_->clone(this))
 415 {}
 416
 417
 418 InsetExternal::~InsetExternal()
 419 {
 420         hideDialogs("external", this);
 421
 422         map<BufferView const *, bool>::iterator it = mouse_hover_.begin();
 423         map<BufferView const *, bool>::iterator end = mouse_hover_.end();
 424         for (; it != end; ++it)
 425                 if (it->second)
 426                         it->first->clearLastInset(this);
 427 }
 428
 429
 430 bool InsetExternal::setMouseHover(BufferView const * bv, bool mouse_hover) const
 431 {
 432         mouse_hover_[bv] = mouse_hover;
 433         return true;
 434 }
 435
 436
 437 void InsetExternal::statusChanged() const
 438 {
 439         updateFrontend();
 440 }
 441
 442
 443 void InsetExternal::doDispatch(Cursor & cur, FuncRequest & cmd)
 444 {
 445         switch (cmd.action()) {
 446
 447         case LFUN_INSET_EDIT: {
 448                 InsetExternalParams p =  params();
 449                 if (!cmd.argument().empty())
 450                         string2params(to_utf8(cmd.argument()), buffer(), p);
 451                 external::editExternal(p, buffer());
 452                 break;
 453         }
 454
 455         case LFUN_INSET_MODIFY: {
 456                 InsetExternalParams p;
 457                 string2params(to_utf8(cmd.argument()), buffer(), p);
 458                 cur.recordUndo();
 459                 setParams(p);
 460                 break;
 461         }
 462
 463         case LFUN_INSET_DIALOG_UPDATE:
 464                 cur.bv().updateDialog("external",
 465                         params2string(params(), cur.bv().buffer()));
 466                 break;
 467
 468         default:
 469                 Inset::doDispatch(cur, cmd);
 470         }
 471 }
 472
 473
 474 bool InsetExternal::getStatus(Cursor & cur, FuncRequest const & cmd,
 475                 FuncStatus & flag) const
 476 {
 477         switch (cmd.action()) {
 478
 479         case LFUN_INSET_EDIT:
 480         case LFUN_INSET_MODIFY:
 481         case LFUN_INSET_DIALOG_UPDATE:
 482                 flag.setEnabled(true);
 483                 return true;
 484
 485         default:
 486                 return Inset::getStatus(cur, cmd, flag);
 487         }
 488 }
 489
 490
 491 void InsetExternal::addToToc(DocIterator const & cpit, bool output_active,
 492                                                          UpdateType) const
 493 {
 494         DocIterator pit = cpit;
 495         pit.push_back(CursorSlice(const_cast<InsetExternal &>(*this)));
 496         shared_ptr<Toc> toc = buffer().tocBackend().toc("external");
 497         docstring str = screenLabel(params_, buffer());
 498         toc->push_back(TocItem(pit, 0, str, output_active));
 499 }
 500
 501
 502 bool InsetExternal::showInsetDialog(BufferView * bv) const
 503 {
 504         bv->showDialog("external", params2string(params(), bv->buffer()),
 505                 const_cast<InsetExternal *>(this));
 506         return true;
 507 }
 508
 509
 510 void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 511 {
 512         renderer_->metrics(mi, dim);
 513 }
 514
 515
 516 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 517 {
 518         if (renderer_->asButton())
 519                 renderer_->setRenderState(mouse_hover_[pi.base.bv]);
 520         renderer_->draw(pi, x, y);
 521 }
 522
 523
 524 namespace {
 525
 526 graphics::Params get_grfx_params(InsetExternalParams const & eparams)
 527 {
 528         graphics::Params gparams;
 529
 530         gparams.filename = eparams.filename;
 531         gparams.scale = eparams.lyxscale;
 532         if (eparams.clipdata.clip)
 533                 gparams.bb = eparams.clipdata.bbox;
 534         gparams.angle = convert<double>(eparams.rotationdata.adjAngle());
 535         gparams.display = eparams.display;
 536
 537         return gparams;
 538 }
 539
 540 } // namespace anon
 541
 542
 543 static bool isPreviewWanted(InsetExternalParams const & params)
 544 {
 545         return params.display && params.filename.isReadableFile();
 546 }
 547
 548
 549 static docstring latexString(InsetExternal const & inset)
 550 {
 551         TexRow texrow;
 552         odocstringstream ods;
 553         otexstream os(ods, texrow);
 554         // We don't need to set runparams.encoding since it is not used by
 555         // latex().
 556         OutputParams runparams(0);
 557         runparams.flavor = OutputParams::LATEX;
 558         inset.latex(os, runparams);
 559         return ods.str();
 560 }
 561
 562
 563 static void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
 564                                    InsetExternal const & inset,
 565                                    Buffer const & buffer)
 566 {
 567         InsetExternalParams const & params = inset.params();
 568
 569         if (RenderPreview::previewText() && isPreviewWanted(params)) {
 570                 renderer.setAbsFile(params.filename);
 571                 docstring const snippet = latexString(inset);
 572                 renderer.addPreview(snippet, buffer);
 573                 renderer.startLoading(buffer);
 574         }
 575 }
 576
 577
 578 InsetExternalParams const & InsetExternal::params() const
 579 {
 580         return params_;
 581 }
 582
 583
 584 void InsetExternal::updatePreview()
 585 {
 586         setParams(params_);
 587 }
 588
 589
 590 void InsetExternal::setParams(InsetExternalParams const & p)
 591 {
 592         params_ = p;
 593
 594         // Subsequent calls to the InsetExternal::Params default constructor
 595         // will use this.
 596         defaultTemplateName = params_.templatename();
 597
 598         if (!external::getTemplatePtr(params_) || params_.filename.empty()
 599                 || !params_.display
 600                 || !lyxrc.display_graphics
 601                 || params_.preview_mode == PREVIEW_OFF
 602                 || (params_.preview_mode == PREVIEW_INSTANT
 603                     && !RenderPreview::previewText())) {
 604                 RenderButton * button_ptr = renderer_->asButton();
 605                 if (!button_ptr) {
 606                         renderer_.reset(new RenderButton);
 607                         button_ptr = renderer_->asButton();
 608                 }
 609                 button_ptr->update(screenLabel(params_, buffer()), true);
 610                 return;
 611         }
 612
 613         switch (params_.preview_mode) {
 614         case PREVIEW_OFF:
 615                 // Already taken care of above.
 616                 LASSERT(false, return);
 617                 break;
 618         case PREVIEW_INSTANT: {
 619                 renderer_.reset(new RenderMonitoredPreview(this));
 620                 RenderMonitoredPreview * preview_ptr = preview_ptr = renderer_->asMonitoredPreview();
 621                 preview_ptr->fileChanged(bind(&InsetExternal::fileChanged, this));
 622                 if (preview_ptr->monitoring())
 623                         preview_ptr->stopMonitoring();
 624                 add_preview_and_start_loading(*preview_ptr, *this, buffer());
 625                 break;
 626         }
 627         case PREVIEW_GRAPHICS: {
 628                 RenderGraphic * graphic_ptr = renderer_->asGraphic();
 629                 if (!graphic_ptr) {
 630                         renderer_.reset(new RenderGraphic(this));
 631                         graphic_ptr = renderer_->asGraphic();
 632                 }
 633                 graphic_ptr->update(get_grfx_params(params_));
 634                 break;
 635         }
 636         }
 637 }
 638
 639
 640 void InsetExternal::fileChanged() const
 641 {
 642         Buffer const * const buffer = updateFrontend();
 643         if (!buffer)
 644                 return;
 645
 646         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 647         LASSERT(ptr, return);
 648
 649         ptr->removePreview(*buffer);
 650         add_preview_and_start_loading(*ptr, *this, *buffer);
 651 }
 652
 653
 654 void InsetExternal::write(ostream & os) const
 655 {
 656         params_.write(buffer(), os);
 657 }
 658
 659
 660 void InsetExternal::read(Lexer & lex)
 661 {
 662         InsetExternalParams params;
 663         if (params.read(buffer(), lex))
 664                 setParams(params);
 665 }
 666
 667
 668 void InsetExternal::latex(otexstream & os, OutputParams const & runparams) const
 669 {
 670         if (params_.draft) {
 671                 // FIXME UNICODE
 672                 os << "\\fbox{\\ttfamily{}"
 673                    << from_utf8(params_.filename.outputFileName(buffer().filePath()))
 674                    << "}\n";
 675                 return;
 676         }
 677
 678         // "nice" means that the buffer is exported to LaTeX format but not
 679         // run through the LaTeX compiler.
 680         // If we're running through the LaTeX compiler, we should write the
 681         // generated files in the buffer's temporary directory.
 682         bool const external_in_tmpdir = !runparams.nice;
 683         bool const dryrun = runparams.dryrun || runparams.inComment;
 684
 685         // If the template has specified a PDFLaTeX output, then we try and
 686         // use that.
 687         if (runparams.flavor == OutputParams::PDFLATEX) {
 688                 external::Template const * const et_ptr =
 689                         external::getTemplatePtr(params_);
 690                 if (!et_ptr)
 691                         return;
 692                 external::Template const & et = *et_ptr;
 693
 694                 external::Template::Formats::const_iterator cit =
 695                         et.formats.find("PDFLaTeX");
 696
 697                 if (cit != et.formats.end()) {
 698                         external::writeExternal(params_, "PDFLaTeX",
 699                                                 buffer(), os,
 700                                                 *(runparams.exportdata),
 701                                                 external_in_tmpdir,
 702                                                 dryrun);
 703                         return;
 704                 }
 705         }
 706
 707         external::writeExternal(params_, "LaTeX", buffer(), os,
 708                                 *(runparams.exportdata),
 709                                 external_in_tmpdir,
 710                                 dryrun);
 711 }
 712
 713
 714 int InsetExternal::plaintext(odocstringstream & os,
 715                              OutputParams const & runparams, size_t) const
 716 {
 717         // this is too slow for constant use
 718         if (runparams.for_tooltip)
 719                 return 0;
 720
 721         TexRow texrow;
 722         otexstream ots(os, texrow);
 723         ots << '\n'; // output external material on a new line
 724         external::writeExternal(params_, "Ascii", buffer(), ots,
 725                                 *(runparams.exportdata), false,
 726                                 runparams.dryrun || runparams.inComment);
 727         return PLAINTEXT_NEWLINE;
 728 }
 729
 730
 731 int InsetExternal::docbook(odocstream & os,
 732                            OutputParams const & runparams) const
 733 {
 734         TexRow texrow;
 735         odocstringstream ods;
 736         otexstream ots(ods, texrow);
 737         external::writeExternal(params_, "DocBook", buffer(), ots,
 738                                 *(runparams.exportdata), false,
 739                                 runparams.dryrun || runparams.inComment);
 740         os << ods.str();
 741         return int(count(ods.str().begin(), ods.str().end(), '\n'));
 742 }
 743
 744
 745 docstring InsetExternal::xhtml(XHTMLStream  & /*xs*/,
 746                         OutputParams const & /*rp*/) const
 747 {
 748 //      external::writeExternal(params_, "XHTML", buffer(), os,
 749 //                                     *(runparams.exportdata), false,
 750 //                                     runparams.dryrun || runparams.inComment);
 751         return docstring();
 752 }
 753
 754
 755 void InsetExternal::validate(LaTeXFeatures & features) const
 756 {
 757         if (params_.draft)
 758                 return;
 759
 760         external::Template const * const et_ptr =
 761                 external::getTemplatePtr(params_);
 762         if (!et_ptr)
 763                 return;
 764         external::Template const & et = *et_ptr;
 765
 766         string format;
 767         switch (features.runparams().flavor) {
 768         case OutputParams::LATEX:
 769         case OutputParams::DVILUATEX:
 770                 format = "LaTeX";
 771                 break;
 772         case OutputParams::LUATEX:
 773         case OutputParams::PDFLATEX:
 774         case OutputParams::XETEX:
 775                 format = "PDFLaTeX";
 776                 break;
 777         case OutputParams::XML:
 778                 format = "DocBook";
 779                 break;
 780         case OutputParams::HTML:
 781                 format = "html";
 782                 break;
 783         case OutputParams::TEXT:
 784                 format = "text";
 785                 break;
 786         case OutputParams::LYX:
 787                 format = "lyx";
 788                 break;
 789         }
 790         external::Template::Formats::const_iterator cit =
 791                 et.formats.find(format);
 792
 793         if (cit == et.formats.end()) {
 794                 // If the template has not specified a PDFLaTeX output,
 795                 // we try the LaTeX format.
 796                 if (format == "PDFLaTeX") {
 797                         cit = et.formats.find("LaTeX");
 798                         if (cit == et.formats.end())
 799                                 return;
 800                 } else
 801                         return;
 802         }
 803
 804         // FIXME: We don't need that always, see InsetGraphics
 805         features.require("lyxdot");
 806
 807         vector<string>::const_iterator it  = cit->second.requirements.begin();
 808         vector<string>::const_iterator end = cit->second.requirements.end();
 809         for (; it != end; ++it)
 810                 features.require(*it);
 811
 812         external::TemplateManager & etm = external::TemplateManager::get();
 813
 814         it  = cit->second.preambleNames.begin();
 815         end = cit->second.preambleNames.end();
 816         for (; it != end; ++it) {
 817                 string const preamble = etm.getPreambleDefByName(*it);
 818                 if (!preamble.empty())
 819                         features.addPreambleSnippet(preamble);
 820         }
 821 }
 822
 823
 824 void InsetExternal::addPreview(DocIterator const & /*inset_pos*/,
 825         graphics::PreviewLoader & ploader) const
 826 {
 827         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 828         if (!ptr)
 829                 return;
 830
 831         if (isPreviewWanted(params())) {
 832                 ptr->setAbsFile(params_.filename);
 833                 docstring const snippet = latexString(*this);
 834                 ptr->addPreview(snippet, ploader);
 835         }
 836 }
 837
 838
 839 string InsetExternal::contextMenuName() const
 840 {
 841         return "context-external";
 842 }
 843
 844
 845 void InsetExternal::string2params(string const & in, Buffer const & buffer,
 846         InsetExternalParams & params)
 847 {
 848         params = InsetExternalParams();
 849         if (in.empty())
 850                 return;
 851
 852         istringstream data(in);
 853         Lexer lex;
 854         lex.setStream(data);
 855
 856         string name;
 857         lex >> name;
 858         if (!lex || name != "external") {
 859                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 860                                           "Expected arg 1 to be \"external\"\n");
 861                 return;
 862         }
 863
 864         // This is part of the inset proper that is usually swallowed
 865         // by Text::readInset
 866         string id;
 867         lex >> id;
 868         if (!lex || id != "External") {
 869                 LYXERR0("InsetExternal::string2params(" << in << ")\n"
 870                                           "Expected arg 2 to be \"External\"\n");
 871                 return;
 872         }
 873
 874         params.read(buffer, lex);
 875 }
 876
 877
 878 string InsetExternal::params2string(InsetExternalParams const & params,
 879         Buffer const & buffer)
 880 {
 881         ostringstream data;
 882         data << "external" << ' ';
 883         params.write(buffer, data);
 884         data << "\\end_inset\n";
 885         return data.str();
 886 }
 887
 888 } // namespace lyx