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