src/insets/insetexternal.C

   1 /**
   2  * \file insetexternal.C
   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/ExternalTemplate.h"
  16 #include "insets/render_button.h"
  17 #include "insets/render_graphic.h"
  18 #include "insets/render_preview.h"
  19
  20 #include "buffer.h"
  21 #include "cursor.h"
  22 #include "debug.h"
  23 #include "dispatchresult.h"
  24 #include "exporter.h"
  25 #include "funcrequest.h"
  26 #include "gettext.h"
  27 #include "LaTeXFeatures.h"
  28 #include "lyx_main.h"
  29 #include "lyxlex.h"
  30 #include "lyxrc.h"
  31 #include "metricsinfo.h"
  32 #include "outputparams.h"
  33
  34 #include "frontends/lyx_gui.h"
  35
  36 #include "graphics/PreviewLoader.h"
  37
  38 #include "support/filetools.h"
  39 #include "support/lstrings.h"
  40 #include "support/lyxlib.h"
  41 #include "support/convert.h"
  42 #include "support/translator.h"
  43
  44 #include <boost/bind.hpp>
  45
  46 #include <sstream>
  47
  48 namespace support = lyx::support;
  49 namespace external = lyx::external;
  50 namespace graphics = lyx::graphics;
  51
  52 using std::endl;
  53 using std::string;
  54 using std::auto_ptr;
  55 using std::istringstream;
  56 using std::ostream;
  57 using std::ostringstream;
  58 using std::vector;
  59
  60
  61 namespace {
  62
  63 external::DisplayType const defaultDisplayType = external::NoDisplay;
  64
  65 unsigned int const defaultLyxScale = 100;
  66
  67 string defaultTemplateName = "RasterImage";
  68
  69 } // namespace anon
  70
  71
  72 namespace lyx {
  73 namespace external {
  74
  75 TempName::TempName()
  76 {
  77         tempname_ = support::tempName(string(), "lyxext");
  78         // FIXME: This is unsafe
  79         support::unlink(tempname_);
  80         // must have an extension for the converter code to work correctly.
  81         tempname_ += ".tmp";
  82 }
  83
  84
  85 TempName::TempName(TempName const &)
  86 {
  87         tempname_ = TempName()();
  88 }
  89
  90
  91 TempName::~TempName()
  92 {
  93         support::unlink(tempname_);
  94 }
  95
  96
  97 TempName &
  98 TempName::operator=(TempName const & other)
  99 {
 100         if (this != &other)
 101                 tempname_ = TempName()();
 102         return *this;
 103 }
 104
 105
 106 namespace {
 107
 108 /// The translator between the Display enum and corresponding lyx string.
 109 Translator<DisplayType, string> const initTranslator()
 110 {
 111         Translator<DisplayType, string> translator(DefaultDisplay, "default");
 112
 113         // Fill the display translator
 114         translator.addPair(MonochromeDisplay, "monochrome");
 115         translator.addPair(GrayscaleDisplay, "grayscale");
 116         translator.addPair(ColorDisplay, "color");
 117         translator.addPair(PreviewDisplay, "preview");
 118         translator.addPair(NoDisplay, "none");
 119
 120         return translator;
 121 }
 122
 123 } // namespace anon
 124
 125
 126 Translator<DisplayType, string> const & displayTranslator()
 127 {
 128         static Translator<DisplayType, string> const translator =
 129                 initTranslator();
 130         return translator;
 131 }
 132
 133 } // namespace external
 134 } // namespace lyx
 135
 136
 137 InsetExternalParams::InsetExternalParams()
 138         : display(defaultDisplayType),
 139           lyxscale(defaultLyxScale),
 140           draft(false),
 141           templatename_(defaultTemplateName)
 142 {}
 143
 144
 145 namespace {
 146
 147 template <typename T>
 148 void clearIfNotFound(T & data, external::TransformID value,
 149                      vector<external::TransformID> const & ids)
 150 {
 151         typedef vector<external::TransformID>::const_iterator
 152                 const_iterator;
 153
 154         const_iterator it  = ids.begin();
 155         const_iterator end = ids.end();
 156         it = std::find(it, end, value);
 157         if (it == end)
 158                 data = T();
 159 }
 160
 161 } // namespace anon
 162
 163
 164 void InsetExternalParams::settemplate(string const & name)
 165 {
 166         templatename_ = name;
 167
 168         external::TemplateManager const & etm =
 169                 external::TemplateManager::get();
 170         external::Template const * const et = etm.getTemplateByName(name);
 171         if (!et)
 172                 // Be safe. Don't lose data.
 173                 return;
 174
 175         // Ascertain which transforms the template supports.
 176         // Empty all those that it doesn't.
 177         vector<external::TransformID> const & ids = et->transformIds;
 178         clearIfNotFound(clipdata,     external::Clip,   ids);
 179         clearIfNotFound(extradata,    external::Extra,  ids);
 180         clearIfNotFound(resizedata,   external::Resize, ids);
 181         clearIfNotFound(rotationdata, external::Rotate, ids);
 182 }
 183
 184
 185 void InsetExternalParams::write(Buffer const & buffer, ostream & os) const
 186 {
 187         os << "External\n"
 188            << "\ttemplate " << templatename() << '\n';
 189
 190         if (!filename.empty())
 191                 os << "\tfilename "
 192                    << filename.outputFilename(buffer.filePath())
 193                    << '\n';
 194
 195         if (display != defaultDisplayType)
 196                 os << "\tdisplay "
 197                    << external::displayTranslator().find(display)
 198                    << '\n';
 199
 200         if (lyxscale != defaultLyxScale)
 201                 os << "\tlyxscale " << convert<string>(lyxscale) << '\n';
 202
 203         if (draft)
 204                 os << "\tdraft\n";
 205
 206         if (!clipdata.bbox.empty())
 207                 os << "\tboundingBox " << clipdata.bbox << '\n';
 208         if (clipdata.clip)
 209                 os << "\tclip\n";
 210
 211         external::ExtraData::const_iterator it  = extradata.begin();
 212         external::ExtraData::const_iterator end = extradata.end();
 213         for (; it != end; ++it) {
 214                 if (!it->second.empty())
 215                         os << "\textra " << it->first << " \""
 216                            << it->second << "\"\n";
 217         }
 218
 219         if (!rotationdata.no_rotation()) {
 220                 os << "\trotateAngle " << rotationdata.adjAngle() << '\n';
 221                 if (rotationdata.origin() != external::RotationData::DEFAULT)
 222                         os << "\trotateOrigin "
 223                            << rotationdata.originString() << '\n';
 224         }
 225
 226         if (!resizedata.no_resize()) {
 227                 using support::float_equal;
 228                 double const scl = convert<double>(resizedata.scale);
 229                 if (!float_equal(scl, 0.0, 0.05)) {
 230                         if (!float_equal(scl, 100.0, 0.05))
 231                                 os << "\tscale "
 232                                    << resizedata.scale << '\n';
 233                 } else {
 234                         if (!resizedata.width.zero())
 235                                 os << "\twidth "
 236                                    << resizedata.width.asString() << '\n';
 237                         if (!resizedata.height.zero())
 238                                 os << "\theight "
 239                                    << resizedata.height.asString() << '\n';
 240                 }
 241                 if (resizedata.keepAspectRatio)
 242                         os << "\tkeepAspectRatio\n";
 243         }
 244 }
 245
 246
 247 bool InsetExternalParams::read(Buffer const & buffer, LyXLex & lex)
 248 {
 249         enum ExternalTags {
 250                 EX_TEMPLATE = 1,
 251                 EX_FILENAME,
 252                 EX_DISPLAY,
 253                 EX_LYXSCALE,
 254                 EX_DRAFT,
 255                 EX_BOUNDINGBOX,
 256                 EX_CLIP,
 257                 EX_EXTRA,
 258                 EX_HEIGHT,
 259                 EX_KEEPASPECTRATIO,
 260                 EX_ROTATEANGLE,
 261                 EX_ROTATEORIGIN,
 262                 EX_SCALE,
 263                 EX_WIDTH,
 264                 EX_END
 265         };
 266
 267         keyword_item external_tags[] = {
 268                 { "\\end_inset",     EX_END },
 269                 { "boundingBox",     EX_BOUNDINGBOX },
 270                 { "clip",            EX_CLIP },
 271                 { "display",         EX_DISPLAY},
 272                 { "draft",           EX_DRAFT},
 273                 { "extra",           EX_EXTRA },
 274                 { "filename",        EX_FILENAME},
 275                 { "height",          EX_HEIGHT },
 276                 { "keepAspectRatio", EX_KEEPASPECTRATIO },
 277                 { "lyxscale",        EX_LYXSCALE},
 278                 { "rotateAngle",     EX_ROTATEANGLE },
 279                 { "rotateOrigin",    EX_ROTATEORIGIN },
 280                 { "scale",           EX_SCALE },
 281                 { "template",        EX_TEMPLATE },
 282                 { "width",           EX_WIDTH }
 283         };
 284
 285         pushpophelper pph(lex, external_tags, EX_END);
 286
 287         bool found_end  = false;
 288         bool read_error = false;
 289
 290         while (lex.isOK()) {
 291                 switch (lex.lex()) {
 292                 case EX_TEMPLATE:
 293                         lex.next();
 294                         templatename_ = lex.getString();
 295                         break;
 296
 297                 case EX_FILENAME: {
 298                         lex.next();
 299                         string const name = lex.getString();
 300                         filename.set(name, buffer.filePath());
 301                         break;
 302                 }
 303
 304                 case EX_DISPLAY: {
 305                         lex.next();
 306                         string const name = lex.getString();
 307                         display = external::displayTranslator().find(name);
 308                         break;
 309                 }
 310
 311                 case EX_LYXSCALE:
 312                         lex.next();
 313                         lyxscale = lex.getInteger();
 314                         break;
 315
 316                 case EX_DRAFT:
 317                         draft = true;
 318                         break;
 319
 320                 case EX_BOUNDINGBOX:
 321                         lex.next();
 322                         clipdata.bbox.xl = lex.getInteger();
 323                         lex.next();
 324                         clipdata.bbox.yb = lex.getInteger();
 325                         lex.next();
 326                         clipdata.bbox.xr = lex.getInteger();
 327                         lex.next();
 328                         clipdata.bbox.yt = lex.getInteger();
 329                         break;
 330
 331                 case EX_CLIP:
 332                         clipdata.clip = true;
 333                         break;
 334
 335                 case EX_EXTRA: {
 336                         lex.next();
 337                         string const name = lex.getString();
 338                         lex.next();
 339                         extradata.set(name, lex.getString());
 340                         break;
 341                 }
 342
 343                 case EX_HEIGHT:
 344                         lex.next();
 345                         resizedata.height = LyXLength(lex.getString());
 346                         break;
 347
 348                 case EX_KEEPASPECTRATIO:
 349                         resizedata.keepAspectRatio = true;
 350                         break;
 351
 352                 case EX_ROTATEANGLE:
 353                         lex.next();
 354                         rotationdata.angle = lex.getString();
 355                         break;
 356
 357                 case EX_ROTATEORIGIN:
 358                         lex.next();
 359                         rotationdata.origin(lex.getString());
 360                         break;
 361
 362                 case EX_SCALE:
 363                         lex.next();
 364                         resizedata.scale = lex.getString();
 365                         break;
 366
 367                 case EX_WIDTH:
 368                         lex.next();
 369                         resizedata.width = LyXLength(lex.getString());
 370                         break;
 371
 372                 case EX_END:
 373                         found_end = true;
 374                         break;
 375
 376                 default:
 377                         lex.printError("ExternalInset::read: "
 378                                        "Wrong tag: $$Token");
 379                         read_error = true;
 380                         break;
 381                 }
 382
 383                 if (found_end || read_error)
 384                         break;
 385         }
 386
 387         if (!found_end)
 388                 lex.printError("ExternalInsetParams::read: Missing \\end_inset.");
 389
 390         // This is a trick to make sure that the data are self-consistent.
 391         settemplate(templatename_);
 392
 393         if (lyxerr.debugging(Debug::EXTERNAL)) {
 394                 lyxerr  << "InsetExternalParams::read:\n";
 395                 write(buffer, lyxerr);
 396         }
 397
 398         return !read_error;
 399 }
 400
 401
 402 InsetExternal::InsetExternal()
 403         : renderer_(new RenderButton)
 404 {}
 405
 406
 407 InsetExternal::InsetExternal(InsetExternal const & other)
 408         : InsetOld(other),
 409           boost::signals::trackable(),
 410           params_(other.params_),
 411           renderer_(other.renderer_->clone(this))
 412 {}
 413
 414
 415 auto_ptr<InsetBase> InsetExternal::doClone() const
 416 {
 417         return auto_ptr<InsetBase>(new InsetExternal(*this));
 418 }
 419
 420
 421 InsetExternal::~InsetExternal()
 422 {
 423         InsetExternalMailer(*this).hideDialog();
 424 }
 425
 426
 427 void InsetExternal::statusChanged() const
 428 {
 429         LyX::cref().updateInset(this);
 430 }
 431
 432
 433 void InsetExternal::doDispatch(LCursor & cur, FuncRequest & cmd)
 434 {
 435         switch (cmd.action) {
 436
 437         case LFUN_EXTERNAL_EDIT: {
 438                 Buffer const & buffer = cur.buffer();
 439                 InsetExternalParams p;
 440                 InsetExternalMailer::string2params(lyx::to_utf8(cmd.argument()), buffer, p);
 441                 external::editExternal(p, buffer);
 442                 break;
 443         }
 444
 445         case LFUN_INSET_MODIFY: {
 446                 Buffer const & buffer = cur.buffer();
 447                 InsetExternalParams p;
 448                 InsetExternalMailer::string2params(lyx::to_utf8(cmd.argument()), buffer, p);
 449                 setParams(p, buffer);
 450                 break;
 451         }
 452
 453         case LFUN_INSET_DIALOG_UPDATE:
 454                 InsetExternalMailer(*this).updateDialog(&cur.bv());
 455                 break;
 456
 457         case LFUN_MOUSE_RELEASE:
 458                 InsetExternalMailer(*this).showDialog(&cur.bv());
 459                 break;
 460
 461         default:
 462                 InsetBase::doDispatch(cur, cmd);
 463         }
 464 }
 465
 466
 467 bool InsetExternal::getStatus(LCursor & cur, FuncRequest const & cmd,
 468                 FuncStatus & flag) const
 469 {
 470         switch (cmd.action) {
 471
 472         case LFUN_EXTERNAL_EDIT:
 473         case LFUN_INSET_MODIFY:
 474         case LFUN_INSET_DIALOG_UPDATE:
 475                 flag.enabled(true);
 476                 return true;
 477
 478         default:
 479                 return InsetBase::getStatus(cur, cmd, flag);
 480         }
 481 }
 482
 483
 484 void InsetExternal::edit(LCursor & cur, bool)
 485 {
 486         InsetExternalMailer(*this).showDialog(&cur.bv());
 487 }
 488
 489
 490 void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 491 {
 492         renderer_->metrics(mi, dim);
 493         dim_ = dim;
 494 }
 495
 496
 497 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 498 {
 499         setPosCache(pi, x, y);
 500         renderer_->draw(pi, x, y);
 501 }
 502
 503
 504 namespace {
 505
 506 enum RenderType {
 507         RENDERBUTTON,
 508         RENDERGRAPHIC,
 509         RENDERPREVIEW
 510 };
 511
 512
 513 RenderType getRenderType(InsetExternalParams const & p)
 514 {
 515         if (!external::getTemplatePtr(p) ||
 516             p.filename.empty() ||
 517             p.display == external::NoDisplay)
 518                 return RENDERBUTTON;
 519
 520         if (p.display == external::PreviewDisplay) {
 521                 if (RenderPreview::status() != LyXRC::PREVIEW_OFF)
 522                         return RENDERPREVIEW;
 523                 return RENDERBUTTON;
 524         }
 525
 526         if (p.display == external::DefaultDisplay &&
 527             lyxrc.display_graphics == graphics::NoDisplay)
 528                 return RENDERBUTTON;
 529         return RENDERGRAPHIC;
 530 }
 531
 532
 533 graphics::Params get_grfx_params(InsetExternalParams const & eparams)
 534 {
 535         graphics::Params gparams;
 536
 537         gparams.filename = eparams.filename.absFilename();
 538         gparams.scale = eparams.lyxscale;
 539         if (eparams.clipdata.clip)
 540                 gparams.bb = eparams.clipdata.bbox;
 541         gparams.angle = convert<double>(eparams.rotationdata.adjAngle());
 542
 543         switch (eparams.display) {
 544         case external::DefaultDisplay:
 545                 gparams.display = graphics::DefaultDisplay;
 546                 break;
 547         case external::MonochromeDisplay:
 548                 gparams.display = graphics::MonochromeDisplay;
 549                 break;
 550         case external::GrayscaleDisplay:
 551                 gparams.display = graphics::GrayscaleDisplay;
 552                 break;
 553         case external::ColorDisplay:
 554                 gparams.display = graphics::ColorDisplay;
 555                 break;
 556         case external::NoDisplay:
 557                 gparams.display = graphics::NoDisplay;
 558                 break;
 559         default:
 560                 BOOST_ASSERT(false);
 561         }
 562         if (gparams.display == graphics::DefaultDisplay)
 563                 gparams.display = lyxrc.display_graphics;
 564         // Override the above if we're not using a gui
 565         if (!lyx_gui::use_gui)
 566                 gparams.display = graphics::NoDisplay;
 567
 568         return gparams;
 569 }
 570
 571
 572 string const getScreenLabel(InsetExternalParams const & params,
 573                             Buffer const & buffer)
 574 {
 575         external::Template const * const ptr =
 576                 external::getTemplatePtr(params);
 577         if (!ptr)
 578                 // FIXME UNICODE
 579                 return lyx::to_utf8(support::bformat(_("External template %1$s is not installed"),
 580                                         lyx::from_utf8(params.templatename())));
 581         return external::doSubstitution(params, buffer, ptr->guiName, false);
 582 }
 583
 584 void add_preview_and_start_loading(RenderMonitoredPreview &,
 585                                    InsetExternal const &,
 586                                    Buffer const &);
 587
 588 } // namespace anon
 589
 590
 591 InsetExternalParams const & InsetExternal::params() const
 592 {
 593         return params_;
 594 }
 595
 596
 597 void InsetExternal::setParams(InsetExternalParams const & p,
 598                               Buffer const & buffer)
 599 {
 600         params_ = p;
 601
 602         // Subsequent calls to the InsetExternal::Params default constructor
 603         // will use this.
 604         defaultTemplateName = params_.templatename();
 605
 606         switch (getRenderType(params_)) {
 607         case RENDERBUTTON: {
 608                 RenderButton * button_ptr = renderer_->asButton();
 609                 if (!button_ptr) {
 610                         renderer_.reset(new RenderButton);
 611                         button_ptr = renderer_->asButton();
 612                 }
 613
 614                 button_ptr->update(getScreenLabel(params_, buffer), true);
 615                 break;
 616
 617         } case RENDERGRAPHIC: {
 618                 RenderGraphic * graphic_ptr = renderer_->asGraphic();
 619                 if (!graphic_ptr) {
 620                         renderer_.reset(new RenderGraphic(this));
 621                         graphic_ptr = renderer_->asGraphic();
 622                 }
 623
 624                 graphic_ptr->update(get_grfx_params(params_));
 625
 626                 break;
 627
 628         } case RENDERPREVIEW: {
 629                 RenderMonitoredPreview * preview_ptr =
 630                         renderer_->asMonitoredPreview();
 631                 if (!preview_ptr) {
 632                         renderer_.reset(new RenderMonitoredPreview(this));
 633                         preview_ptr = renderer_->asMonitoredPreview();
 634                         preview_ptr->fileChanged(
 635                                 boost::bind(&InsetExternal::fileChanged, this));
 636                 }
 637
 638                 if (preview_ptr->monitoring())
 639                         preview_ptr->stopMonitoring();
 640                 add_preview_and_start_loading(*preview_ptr, *this, buffer);
 641
 642                 break;
 643         }
 644         }
 645 }
 646
 647
 648 void InsetExternal::fileChanged() const
 649 {
 650         Buffer const * const buffer_ptr = LyX::cref().updateInset(this);
 651         if (!buffer_ptr)
 652                 return;
 653
 654         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 655         BOOST_ASSERT(ptr);
 656
 657         Buffer const & buffer = *buffer_ptr;
 658         ptr->removePreview(buffer);
 659         add_preview_and_start_loading(*ptr, *this, buffer);
 660 }
 661
 662
 663 void InsetExternal::write(Buffer const & buffer, ostream & os) const
 664 {
 665         params_.write(buffer, os);
 666 }
 667
 668
 669 void InsetExternal::read(Buffer const & buffer, LyXLex & lex)
 670 {
 671         InsetExternalParams params;
 672         if (params.read(buffer, lex))
 673                 setParams(params, buffer);
 674 }
 675
 676
 677 int InsetExternal::latex(Buffer const & buf, ostream & os,
 678                          OutputParams const & runparams) const
 679 {
 680         if (params_.draft) {
 681                 os << "\\fbox{\\ttfamily{}"
 682                    << params_.filename.outputFilename(buf.filePath())
 683                    << "}\n";
 684                 return 1;
 685         }
 686
 687         // "nice" means that the buffer is exported to LaTeX format but not
 688         // run through the LaTeX compiler.
 689         // If we're running through the LaTeX compiler, we should write the
 690         // generated files in the bufer's temporary directory.
 691         bool const external_in_tmpdir = !runparams.nice && !runparams.dryrun;
 692
 693         // If the template has specified a PDFLaTeX output, then we try and
 694         // use that.
 695         if (runparams.flavor == OutputParams::PDFLATEX) {
 696                 external::Template const * const et_ptr =
 697                         external::getTemplatePtr(params_);
 698                 if (!et_ptr)
 699                         return 0;
 700                 external::Template const & et = *et_ptr;
 701
 702                 external::Template::Formats::const_iterator cit =
 703                         et.formats.find("PDFLaTeX");
 704                 if (cit != et.formats.end())
 705                         return external::writeExternal(params_, "PDFLaTeX",
 706                                                        buf, os,
 707                                                        *(runparams.exportdata),
 708                                                        external_in_tmpdir,
 709                                                        runparams.inComment);
 710         }
 711         return external::writeExternal(params_, "LaTeX", buf, os,
 712                                        *(runparams.exportdata),
 713                                        external_in_tmpdir,
 714                                        runparams.inComment);
 715 }
 716
 717
 718 int InsetExternal::plaintext(Buffer const & buf, ostream & os,
 719                          OutputParams const & runparams) const
 720 {
 721         return external::writeExternal(params_, "Ascii", buf, os,
 722                                        *(runparams.exportdata), false,
 723                                        runparams.inComment);
 724 }
 725
 726
 727 int InsetExternal::docbook(Buffer const & buf, ostream & os,
 728                            OutputParams const & runparams) const
 729 {
 730         return external::writeExternal(params_, "DocBook", buf, os,
 731                                        *(runparams.exportdata), false,
 732                                        runparams.inComment);
 733 }
 734
 735
 736 void InsetExternal::validate(LaTeXFeatures & features) const
 737 {
 738         if (params_.draft)
 739                 return;
 740
 741         external::Template const * const et_ptr =
 742                 external::getTemplatePtr(params_);
 743         if (!et_ptr)
 744                 return;
 745         external::Template const & et = *et_ptr;
 746
 747         string format;
 748         switch (features.runparams().flavor) {
 749         case OutputParams::LATEX:
 750                 format = "LaTeX";
 751                 break;
 752         case OutputParams::PDFLATEX:
 753                 format = "PDFLaTeX";
 754                 break;
 755         case OutputParams::XML:
 756                 format = "DocBook";
 757                 break;
 758         }
 759         external::Template::Formats::const_iterator cit =
 760                 et.formats.find(format);
 761         if (cit == et.formats.end())
 762                 return;
 763
 764         // FIXME: We don't need that always
 765         features.require("lyxdot");
 766
 767         vector<string>::const_iterator it  = cit->second.requirements.begin();
 768         vector<string>::const_iterator end = cit->second.requirements.end();
 769         for (; it != end; ++it)
 770                 features.require(*it);
 771
 772         external::TemplateManager & etm = external::TemplateManager::get();
 773
 774         it  = cit->second.preambleNames.begin();
 775         end = cit->second.preambleNames.end();
 776         for (; it != end; ++it) {
 777                 string const preamble = etm.getPreambleDefByName(*it);
 778                 if (!preamble.empty())
 779                         features.addExternalPreamble(preamble);
 780         }
 781 }
 782
 783
 784 //
 785 // preview stuff
 786 //
 787
 788 namespace {
 789
 790 bool preview_wanted(InsetExternalParams const & params)
 791 {
 792         string const included_file = params.filename.absFilename();
 793
 794         return params.display == external::PreviewDisplay &&
 795                 support::isFileReadable(included_file);
 796 }
 797
 798
 799 string const latex_string(InsetExternal const & inset, Buffer const & buffer)
 800 {
 801         ostringstream os;
 802         OutputParams runparams;
 803         runparams.flavor = OutputParams::LATEX;
 804         inset.latex(buffer, os, runparams);
 805
 806         return os.str();
 807 }
 808
 809
 810 void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
 811                                    InsetExternal const & inset,
 812                                    Buffer const & buffer)
 813 {
 814         InsetExternalParams const & params = inset.params();
 815
 816         if (RenderPreview::status() != LyXRC::PREVIEW_OFF &&
 817             preview_wanted(params)) {
 818                 renderer.setAbsFile(params.filename.absFilename());
 819                 string const snippet = latex_string(inset, buffer);
 820                 renderer.addPreview(snippet, buffer);
 821                 renderer.startLoading(buffer);
 822         }
 823 }
 824
 825 } // namespace anon
 826
 827
 828 void InsetExternal::addPreview(graphics::PreviewLoader & ploader) const
 829 {
 830         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 831         if (!ptr)
 832                 return;
 833
 834         if (preview_wanted(params())) {
 835                 ptr->setAbsFile(params_.filename.absFilename());
 836                 string const snippet = latex_string(*this, ploader.buffer());
 837                 ptr->addPreview(snippet, ploader);
 838         }
 839 }
 840
 841
 842 /// Mailer stuff
 843
 844 string const InsetExternalMailer::name_("external");
 845
 846 InsetExternalMailer::InsetExternalMailer(InsetExternal & inset)
 847         : inset_(inset)
 848 {}
 849
 850
 851 string const InsetExternalMailer::inset2string(Buffer const & buffer) const
 852 {
 853         return params2string(inset_.params(), buffer);
 854 }
 855
 856
 857 void InsetExternalMailer::string2params(string const & in,
 858                                         Buffer const & buffer,
 859                                         InsetExternalParams & params)
 860 {
 861         params = InsetExternalParams();
 862         if (in.empty())
 863                 return;
 864
 865         istringstream data(in);
 866         LyXLex lex(0,0);
 867         lex.setStream(data);
 868
 869         string name;
 870         lex >> name;
 871         if (!lex || name != name_)
 872                 return print_mailer_error("InsetExternalMailer", in, 1, name_);
 873
 874         // This is part of the inset proper that is usually swallowed
 875         // by LyXText::readInset
 876         string id;
 877         lex >> id;
 878         if (!lex || id != "External")
 879                 return print_mailer_error("InsetBoxMailer", in, 2, "External");
 880
 881         params.read(buffer, lex);
 882 }
 883
 884
 885 string const
 886 InsetExternalMailer::params2string(InsetExternalParams const & params,
 887                                    Buffer const & buffer)
 888 {
 889         ostringstream data;
 890         data << name_ << ' ';
 891         params.write(buffer, data);
 892         data << "\\end_inset\n";
 893         return data.str();
 894 }