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 "exporter.h"
  26 #include "funcrequest.h"
  27 #include "gettext.h"
  28 #include "LaTeXFeatures.h"
  29 #include "lyx_main.h"
  30 #include "lyxlex.h"
  31 #include "lyxrc.h"
  32 #include "metricsinfo.h"
  33 #include "outputparams.h"
  34
  35 #include "frontends/lyx_gui.h"
  36 #include "frontends/LyXView.h"
  37
  38 #include "graphics/PreviewLoader.h"
  39
  40 #include "support/filetools.h"
  41 #include "support/lstrings.h"
  42 #include "support/lyxlib.h"
  43 #include "support/convert.h"
  44 #include "support/translator.h"
  45
  46 #include <boost/bind.hpp>
  47
  48 #include <sstream>
  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 " << convert<string>(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.adjAngle() << '\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                 double const scl = convert<double>(resizedata.scale);
 231                 if (!float_equal(scl, 0.0, 0.05)) {
 232                         if (!float_equal(scl, 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.getString();
 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.getString();
 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(this))
 414 {}
 415
 416
 417 auto_ptr<InsetBase> InsetExternal::doClone() const
 418 {
 419         return auto_ptr<InsetBase>(new InsetExternal(*this));
 420 }
 421
 422
 423 InsetExternal::~InsetExternal()
 424 {
 425         InsetExternalMailer(*this).hideDialog();
 426 }
 427
 428
 429 void InsetExternal::statusChanged() const
 430 {
 431         LyX::cref().updateInset(this);
 432 }
 433
 434
 435 void InsetExternal::doDispatch(LCursor & cur, FuncRequest & cmd)
 436 {
 437         switch (cmd.action) {
 438
 439         case LFUN_EXTERNAL_EDIT: {
 440                 Buffer const & buffer = cur.buffer();
 441                 InsetExternalParams p;
 442                 InsetExternalMailer::string2params(cmd.argument, buffer, p);
 443                 external::editExternal(p, buffer);
 444                 break;
 445         }
 446
 447         case LFUN_INSET_MODIFY: {
 448                 Buffer const & buffer = cur.buffer();
 449                 InsetExternalParams p;
 450                 InsetExternalMailer::string2params(cmd.argument, buffer, p);
 451                 setParams(p, buffer);
 452                 break;
 453         }
 454
 455         case LFUN_INSET_DIALOG_UPDATE:
 456                 InsetExternalMailer(*this).updateDialog(&cur.bv());
 457                 break;
 458
 459         case LFUN_MOUSE_RELEASE:
 460                 InsetExternalMailer(*this).showDialog(&cur.bv());
 461                 break;
 462
 463         default:
 464                 InsetBase::doDispatch(cur, cmd);
 465         }
 466 }
 467
 468
 469 void InsetExternal::edit(LCursor & cur, bool)
 470 {
 471         InsetExternalMailer(*this).showDialog(&cur.bv());
 472 }
 473
 474
 475 void InsetExternal::metrics(MetricsInfo & mi, Dimension & dim) const
 476 {
 477         renderer_->metrics(mi, dim);
 478         dim_ = dim;
 479 }
 480
 481
 482 void InsetExternal::draw(PainterInfo & pi, int x, int y) const
 483 {
 484         setPosCache(pi, x, y);
 485         renderer_->draw(pi, x, y);
 486 }
 487
 488
 489 namespace {
 490
 491 enum RenderType {
 492         RENDERBUTTON,
 493         RENDERGRAPHIC,
 494         RENDERPREVIEW
 495 };
 496
 497
 498 RenderType getRenderType(InsetExternalParams const & p)
 499 {
 500         if (!external::getTemplatePtr(p) ||
 501             p.filename.empty() ||
 502             p.display == external::NoDisplay)
 503                 return RENDERBUTTON;
 504
 505         if (p.display == external::PreviewDisplay) {
 506                 if (RenderPreview::status() != LyXRC::PREVIEW_OFF)
 507                         return RENDERPREVIEW;
 508                 return RENDERBUTTON;
 509         }
 510
 511         if (p.display == external::DefaultDisplay &&
 512             lyxrc.display_graphics == graphics::NoDisplay)
 513                 return RENDERBUTTON;
 514         return RENDERGRAPHIC;
 515 }
 516
 517
 518 graphics::Params get_grfx_params(InsetExternalParams const & eparams)
 519 {
 520         graphics::Params gparams;
 521
 522         gparams.filename = eparams.filename.absFilename();
 523         gparams.scale = eparams.lyxscale;
 524         if (eparams.clipdata.clip)
 525                 gparams.bb = eparams.clipdata.bbox;
 526         gparams.angle = convert<double>(eparams.rotationdata.adjAngle());
 527
 528         switch (eparams.display) {
 529         case external::DefaultDisplay:
 530                 gparams.display = graphics::DefaultDisplay;
 531                 break;
 532         case external::MonochromeDisplay:
 533                 gparams.display = graphics::MonochromeDisplay;
 534                 break;
 535         case external::GrayscaleDisplay:
 536                 gparams.display = graphics::GrayscaleDisplay;
 537                 break;
 538         case external::ColorDisplay:
 539                 gparams.display = graphics::ColorDisplay;
 540                 break;
 541         case external::NoDisplay:
 542                 gparams.display = graphics::NoDisplay;
 543                 break;
 544         default:
 545                 BOOST_ASSERT(false);
 546         }
 547         if (gparams.display == graphics::DefaultDisplay)
 548                 gparams.display = lyxrc.display_graphics;
 549         // Override the above if we're not using a gui
 550         if (!lyx_gui::use_gui)
 551                 gparams.display = graphics::NoDisplay;
 552
 553         return gparams;
 554 }
 555
 556
 557 string const getScreenLabel(InsetExternalParams const & params,
 558                             Buffer const & buffer)
 559 {
 560         external::Template const * const ptr =
 561                 external::getTemplatePtr(params);
 562         if (!ptr)
 563                 return support::bformat(_("External template %1$s is not installed"),
 564                                         params.templatename());
 565         return external::doSubstitution(params, buffer, ptr->guiName, false);
 566 }
 567
 568 void add_preview_and_start_loading(RenderMonitoredPreview &,
 569                                    InsetExternal const &,
 570                                    Buffer const &);
 571
 572 } // namespace anon
 573
 574
 575 InsetExternalParams const & InsetExternal::params() const
 576 {
 577         return params_;
 578 }
 579
 580
 581 void InsetExternal::setParams(InsetExternalParams const & p,
 582                               Buffer const & buffer)
 583 {
 584         params_ = p;
 585
 586         // Subsequent calls to the InsetExternal::Params default constructor
 587         // will use this.
 588         defaultTemplateName = params_.templatename();
 589
 590         switch (getRenderType(params_)) {
 591         case RENDERBUTTON: {
 592                 RenderButton * button_ptr = renderer_->asButton();
 593                 if (!button_ptr) {
 594                         renderer_.reset(new RenderButton);
 595                         button_ptr = renderer_->asButton();
 596                 }
 597
 598                 button_ptr->update(getScreenLabel(params_, buffer), true);
 599                 break;
 600
 601         } case RENDERGRAPHIC: {
 602                 RenderGraphic * graphic_ptr = renderer_->asGraphic();
 603                 if (!graphic_ptr) {
 604                         renderer_.reset(new RenderGraphic(this));
 605                         graphic_ptr = renderer_->asGraphic();
 606                 }
 607
 608                 graphic_ptr->update(get_grfx_params(params_));
 609
 610                 break;
 611
 612         } case RENDERPREVIEW: {
 613                 RenderMonitoredPreview * preview_ptr =
 614                         renderer_->asMonitoredPreview();
 615                 if (!preview_ptr) {
 616                         renderer_.reset(new RenderMonitoredPreview(this));
 617                         preview_ptr = renderer_->asMonitoredPreview();
 618                         preview_ptr->fileChanged(
 619                                 boost::bind(&InsetExternal::fileChanged, this));
 620                 }
 621
 622                 if (preview_ptr->monitoring())
 623                         preview_ptr->stopMonitoring();
 624                 add_preview_and_start_loading(*preview_ptr, *this, buffer);
 625
 626                 break;
 627         }
 628         }
 629 }
 630
 631
 632 void InsetExternal::fileChanged() const
 633 {
 634         Buffer const * const buffer_ptr = LyX::cref().updateInset(this);
 635         if (!buffer_ptr)
 636                 return;
 637
 638         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 639         BOOST_ASSERT(ptr);
 640
 641         Buffer const & buffer = *buffer_ptr;
 642         ptr->removePreview(buffer);
 643         add_preview_and_start_loading(*ptr, *this, buffer);
 644 }
 645
 646
 647 void InsetExternal::write(Buffer const & buffer, ostream & os) const
 648 {
 649         params_.write(buffer, os);
 650 }
 651
 652
 653 void InsetExternal::read(Buffer const & buffer, LyXLex & lex)
 654 {
 655         InsetExternalParams params;
 656         if (params.read(buffer, lex))
 657                 setParams(params, buffer);
 658 }
 659
 660
 661 int InsetExternal::latex(Buffer const & buf, ostream & os,
 662                          OutputParams const & runparams) const
 663 {
 664         if (params_.draft) {
 665                 os << "\\fbox{\\ttfamily{}"
 666                    << params_.filename.outputFilename(buf.filePath())
 667                    << "}\n";
 668                 return 1;
 669         }
 670
 671         // "nice" means that the buffer is exported to LaTeX format but not
 672         // run through the LaTeX compiler.
 673         // If we're running through the LaTeX compiler, we should write the
 674         // generated files in the bufer's temporary directory.
 675         bool const external_in_tmpdir = !runparams.nice;
 676
 677         // If the template has specified a PDFLaTeX output, then we try and
 678         // use that.
 679         if (runparams.flavor == OutputParams::PDFLATEX) {
 680                 external::Template const * const et_ptr =
 681                         external::getTemplatePtr(params_);
 682                 if (!et_ptr)
 683                         return 0;
 684                 external::Template const & et = *et_ptr;
 685
 686                 external::Template::Formats::const_iterator cit =
 687                         et.formats.find("PDFLaTeX");
 688                 if (cit != et.formats.end())
 689                         return external::writeExternal(params_, "PDFLaTeX",
 690                                                        buf, os,
 691                                                        *(runparams.exportdata),
 692                                                        external_in_tmpdir);
 693         }
 694         return external::writeExternal(params_, "LaTeX", buf, os,
 695                                        *(runparams.exportdata),
 696                                        external_in_tmpdir);
 697 }
 698
 699
 700 int InsetExternal::plaintext(Buffer const & buf, ostream & os,
 701                          OutputParams const & runparams) const
 702 {
 703         return external::writeExternal(params_, "Ascii", buf, os,
 704                                        *(runparams.exportdata));
 705 }
 706
 707
 708 int InsetExternal::linuxdoc(Buffer const & buf, ostream & os,
 709                             OutputParams const & runparams) const
 710 {
 711         return external::writeExternal(params_, "LinuxDoc", buf, os,
 712                                        *(runparams.exportdata));
 713 }
 714
 715
 716 int InsetExternal::docbook(Buffer const & buf, ostream & os,
 717                            OutputParams const & runparams) const
 718 {
 719         return external::writeExternal(params_, "DocBook", buf, os,
 720                                        *(runparams.exportdata));
 721 }
 722
 723
 724 void InsetExternal::validate(LaTeXFeatures & features) const
 725 {
 726         if (params_.draft)
 727                 return;
 728
 729         external::Template const * const et_ptr =
 730                 external::getTemplatePtr(params_);
 731         if (!et_ptr)
 732                 return;
 733         external::Template const & et = *et_ptr;
 734
 735         external::Template::Formats::const_iterator cit =
 736                 et.formats.find("LaTeX");
 737         if (cit == et.formats.end())
 738                 return;
 739
 740         vector<string>::const_iterator it  = cit->second.requirements.begin();
 741         vector<string>::const_iterator end = cit->second.requirements.end();
 742         for (; it != end; ++it)
 743                 features.require(*it);
 744
 745         external::TemplateManager & etm = external::TemplateManager::get();
 746
 747         it  = cit->second.preambleNames.begin();
 748         end = cit->second.preambleNames.end();
 749         for (; it != end; ++it) {
 750                 string const preamble = etm.getPreambleDefByName(*it);
 751                 if (!preamble.empty())
 752                         features.addExternalPreamble(preamble);
 753         }
 754 }
 755
 756
 757 //
 758 // preview stuff
 759 //
 760
 761 namespace {
 762
 763 bool preview_wanted(InsetExternalParams const & params)
 764 {
 765         string const included_file = params.filename.absFilename();
 766
 767         return params.display == external::PreviewDisplay &&
 768                 support::IsFileReadable(included_file);
 769 }
 770
 771
 772 string const latex_string(InsetExternal const & inset, Buffer const & buffer)
 773 {
 774         ostringstream os;
 775         OutputParams runparams;
 776         runparams.flavor = OutputParams::LATEX;
 777         inset.latex(buffer, os, runparams);
 778
 779         return os.str();
 780 }
 781
 782
 783 void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
 784                                    InsetExternal const & inset,
 785                                    Buffer const & buffer)
 786 {
 787         InsetExternalParams const & params = inset.params();
 788
 789         if (RenderPreview::status() != LyXRC::PREVIEW_OFF &&
 790             preview_wanted(params)) {
 791                 renderer.setAbsFile(params.filename.absFilename());
 792                 string const snippet = latex_string(inset, buffer);
 793                 renderer.addPreview(snippet, buffer);
 794                 renderer.startLoading(buffer);
 795         }
 796 }
 797
 798 } // namespace anon
 799
 800
 801 void InsetExternal::addPreview(graphics::PreviewLoader & ploader) const
 802 {
 803         RenderMonitoredPreview * const ptr = renderer_->asMonitoredPreview();
 804         if (!ptr)
 805                 return;
 806
 807         if (preview_wanted(params())) {
 808                 ptr->setAbsFile(params_.filename.absFilename());
 809                 string const snippet = latex_string(*this, ploader.buffer());
 810                 ptr->addPreview(snippet, ploader);
 811         }
 812 }
 813
 814
 815 /// Mailer stuff
 816
 817 string const InsetExternalMailer::name_("external");
 818
 819 InsetExternalMailer::InsetExternalMailer(InsetExternal & inset)
 820         : inset_(inset)
 821 {}
 822
 823
 824 string const InsetExternalMailer::inset2string(Buffer const & buffer) const
 825 {
 826         return params2string(inset_.params(), buffer);
 827 }
 828
 829
 830 void InsetExternalMailer::string2params(string const & in,
 831                                         Buffer const & buffer,
 832                                         InsetExternalParams & params)
 833 {
 834         params = InsetExternalParams();
 835         if (in.empty())
 836                 return;
 837
 838         istringstream data(in);
 839         LyXLex lex(0,0);
 840         lex.setStream(data);
 841
 842         string name;
 843         lex >> name;
 844         if (!lex || name != name_)
 845                 return print_mailer_error("InsetExternalMailer", in, 1, name_);
 846
 847         // This is part of the inset proper that is usually swallowed
 848         // by LyXText::readInset
 849         string id;
 850         lex >> id;
 851         if (!lex || id != "External")
 852                 return print_mailer_error("InsetBoxMailer", in, 2, "External");
 853
 854         params.read(buffer, lex);
 855 }
 856
 857
 858 string const
 859 InsetExternalMailer::params2string(InsetExternalParams const & params,
 860                                    Buffer const & buffer)
 861 {
 862         ostringstream data;
 863         data << name_ << ' ';
 864         params.write(buffer, data);
 865         data << "\\end_inset\n";
 866         return data.str();
 867 }