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