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