src/extension/internal/pdfinput/pdf-input.cpp

   1  /** \file
   2  * Native PDF import using libpoppler.
   3  *
   4  * Authors:
   5  *   miklos erdelyi
   6  *
   7  * Copyright (C) 2007 Authors
   8  *
   9  * Released under GNU GPL, read the file 'COPYING' for more information
  10  *
  11  */
  12
  13 #ifdef HAVE_CONFIG_H
  14 # include <config.h>
  15 #endif
  16
  17 #ifdef HAVE_POPPLER
  18
  19 #include "goo/GooString.h"
  20 #include "ErrorCodes.h"
  21 #include "GlobalParams.h"
  22 #include "PDFDoc.h"
  23 #include "Page.h"
  24 #include "Catalog.h"
  25
  26 #include "pdf-input.h"
  27 #include "extension/system.h"
  28 #include "extension/input.h"
  29 #include "svg-builder.h"
  30 #include "pdf-parser.h"
  31
  32 #include "document-private.h"
  33
  34 #include <gtk/gtkdialog.h>
  35
  36 namespace Inkscape {
  37 namespace Extension {
  38 namespace Internal {
  39
  40 /**
  41  * \brief The PDF import dialog
  42  * FIXME: Probably this should be placed into src/ui/dialog
  43  */
  44
  45 static Glib::ustring crop_setting_choices[] = {
  46     Glib::ustring(_("media box")),
  47     Glib::ustring(_("crop box")),
  48     Glib::ustring(_("trim box")),
  49     Glib::ustring(_("bleed box")),
  50     Glib::ustring(_("art box"))
  51 };
  52
  53 PdfImportDialog::PdfImportDialog(PDFDoc *doc)
  54 {
  55
  56     _pdf_doc = doc;
  57
  58     cancelbutton = Gtk::manage(new class Gtk::Button(Gtk::StockID("gtk-cancel")));
  59     okbutton = Gtk::manage(new class Gtk::Button(Gtk::StockID("gtk-ok")));
  60     _labelSelect = Gtk::manage(new class Gtk::Label(_("Select page:")));
  61
  62     // Page number
  63     Gtk::Adjustment *_pageNumberSpin_adj = Gtk::manage(
  64             new class Gtk::Adjustment(1, 1, _pdf_doc->getNumPages(), 1, 10, 0));
  65     _pageNumberSpin = Gtk::manage(new class Gtk::SpinButton(*_pageNumberSpin_adj, 1, 1));
  66     hbox2 = Gtk::manage(new class Gtk::HBox(false, 0));
  67     // Disable the page selector when there's only one page
  68     if ( _pdf_doc->getCatalog()->getNumPages() == 1 ) {
  69         _pageNumberSpin->set_sensitive(false);
  70     }
  71
  72     // Crop settings
  73     _cropCheck = Gtk::manage(new class Gtk::CheckButton(_("Crop to:")));
  74     _cropTypeCombo = Gtk::manage(new class Gtk::ComboBoxText());
  75     int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
  76     for ( int i = 0 ; i < num_crop_choices ; i++ ) {
  77         _cropTypeCombo->append_text(crop_setting_choices[i]);
  78     }
  79     _cropTypeCombo->set_active_text(crop_setting_choices[0]);
  80     _cropTypeCombo->set_sensitive(false);
  81
  82     hbox3 = Gtk::manage(new class Gtk::HBox(false, 0));
  83     vbox2 = Gtk::manage(new class Gtk::VBox(false, 0));
  84     alignment3 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
  85     _labelPageSettings = Gtk::manage(new class Gtk::Label(_("Page Settings")));
  86     _pageSettingsFrame = Gtk::manage(new class Gtk::Frame());
  87     _labelPrecision = Gtk::manage(new class Gtk::Label(_("Precision of approximation for gradient meshes:")));
  88
  89     _fallbackPrecisionSlider_adj = Gtk::manage(new class Gtk::Adjustment(2, 1, 256, 1, 10, 10));
  90     _fallbackPrecisionSlider = Gtk::manage(new class Gtk::HScale(*_fallbackPrecisionSlider_adj));
  91     _fallbackPrecisionSlider->set_value(2.0);
  92     _labelPrecisionComment = Gtk::manage(new class Gtk::Label(_("rough")));
  93     hbox6 = Gtk::manage(new class Gtk::HBox(false, 0));
  94
  95     // Text options
  96     _labelText = Gtk::manage(new class Gtk::Label(_("Text handling:")));
  97     _textHandlingCombo = Gtk::manage(new class Gtk::ComboBoxText());
  98     _textHandlingCombo->append_text(_("import text as text"));
  99     _textHandlingCombo->set_active_text(_("import text as text"));
 100
 101     hbox5 = Gtk::manage(new class Gtk::HBox(false, 0));
 102     _embedImagesCheck = Gtk::manage(new class Gtk::CheckButton(_("Embed images")));
 103     vbox3 = Gtk::manage(new class Gtk::VBox(false, 0));
 104     alignment4 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
 105     _labelImportSettings = Gtk::manage(new class Gtk::Label(_("Import Settings")));
 106     _importSettingsFrame = Gtk::manage(new class Gtk::Frame());
 107     vbox1 = Gtk::manage(new class Gtk::VBox(false, 0));
 108     _previewArea = Gtk::manage(new class Gtk::DrawingArea());
 109     hbox1 = Gtk::manage(new class Gtk::HBox(false, 0));
 110     cancelbutton->set_flags(Gtk::CAN_FOCUS);
 111     cancelbutton->set_flags(Gtk::CAN_DEFAULT);
 112     cancelbutton->set_relief(Gtk::RELIEF_NORMAL);
 113     okbutton->set_flags(Gtk::CAN_FOCUS);
 114     okbutton->set_flags(Gtk::CAN_DEFAULT);
 115     okbutton->set_relief(Gtk::RELIEF_NORMAL);
 116     this->get_action_area()->property_layout_style().set_value(Gtk::BUTTONBOX_END);
 117     _labelSelect->set_alignment(0.5,0.5);
 118     _labelSelect->set_padding(0,0);
 119     _labelSelect->set_justify(Gtk::JUSTIFY_LEFT);
 120     _labelSelect->set_line_wrap(false);
 121     _labelSelect->set_use_markup(false);
 122     _labelSelect->set_selectable(false);
 123     _pageNumberSpin->set_flags(Gtk::CAN_FOCUS);
 124     _pageNumberSpin->set_update_policy(Gtk::UPDATE_ALWAYS);
 125     _pageNumberSpin->set_numeric(true);
 126     _pageNumberSpin->set_digits(0);
 127     _pageNumberSpin->set_wrap(false);
 128     hbox2->pack_start(*_labelSelect, Gtk::PACK_SHRINK, 0);
 129     hbox2->pack_start(*_pageNumberSpin, Gtk::PACK_SHRINK, 4);
 130     _cropCheck->set_flags(Gtk::CAN_FOCUS);
 131     _cropCheck->set_relief(Gtk::RELIEF_NORMAL);
 132     _cropCheck->set_mode(true);
 133     _cropCheck->set_active(false);
 134     _cropTypeCombo->set_border_width(1);
 135     hbox3->pack_start(*_cropCheck, Gtk::PACK_SHRINK, 0);
 136     hbox3->pack_start(*_cropTypeCombo, Gtk::PACK_SHRINK, 4);
 137     vbox2->pack_start(*hbox2);
 138     vbox2->pack_start(*hbox3);
 139     alignment3->add(*vbox2);
 140     _labelPageSettings->set_alignment(0.5,0.5);
 141     _labelPageSettings->set_padding(0,0);
 142     _labelPageSettings->set_justify(Gtk::JUSTIFY_LEFT);
 143     _labelPageSettings->set_line_wrap(false);
 144     _labelPageSettings->set_use_markup(true);
 145     _labelPageSettings->set_selectable(false);
 146     _pageSettingsFrame->set_border_width(4);
 147     _pageSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 148     _pageSettingsFrame->set_label_align(0,0.5);
 149     _pageSettingsFrame->add(*alignment3);
 150     _pageSettingsFrame->set_label_widget(*_labelPageSettings);
 151     _labelPrecision->set_alignment(0.5,0.5);
 152     _labelPrecision->set_padding(0,0);
 153     _labelPrecision->set_justify(Gtk::JUSTIFY_LEFT);
 154     _labelPrecision->set_line_wrap(false);
 155     _labelPrecision->set_use_markup(false);
 156     _labelPrecision->set_selectable(false);
 157     _fallbackPrecisionSlider->set_size_request(180,-1);
 158     _fallbackPrecisionSlider->set_flags(Gtk::CAN_FOCUS);
 159     _fallbackPrecisionSlider->set_update_policy(Gtk::UPDATE_CONTINUOUS);
 160     _fallbackPrecisionSlider->set_inverted(false);
 161     _fallbackPrecisionSlider->set_digits(1);
 162     _fallbackPrecisionSlider->set_draw_value(true);
 163     _fallbackPrecisionSlider->set_value_pos(Gtk::POS_TOP);
 164     _labelPrecisionComment->set_size_request(90,-1);
 165     _labelPrecisionComment->set_alignment(0.5,0.5);
 166     _labelPrecisionComment->set_padding(0,0);
 167     _labelPrecisionComment->set_justify(Gtk::JUSTIFY_LEFT);
 168     _labelPrecisionComment->set_line_wrap(false);
 169     _labelPrecisionComment->set_use_markup(false);
 170     _labelPrecisionComment->set_selectable(false);
 171     hbox6->pack_start(*_fallbackPrecisionSlider, Gtk::PACK_SHRINK, 4);
 172     hbox6->pack_start(*_labelPrecisionComment, Gtk::PACK_SHRINK, 4);
 173     _labelText->set_alignment(0.5,0.5);
 174     _labelText->set_padding(0,0);
 175     _labelText->set_justify(Gtk::JUSTIFY_LEFT);
 176     _labelText->set_line_wrap(false);
 177     _labelText->set_use_markup(false);
 178     _labelText->set_selectable(false);
 179     hbox5->pack_start(*_labelText, Gtk::PACK_SHRINK, 0);
 180     hbox5->pack_start(*_textHandlingCombo, Gtk::PACK_SHRINK, 0);
 181     _embedImagesCheck->set_flags(Gtk::CAN_FOCUS);
 182     _embedImagesCheck->set_relief(Gtk::RELIEF_NORMAL);
 183     _embedImagesCheck->set_mode(true);
 184     _embedImagesCheck->set_active(true);
 185     vbox3->pack_start(*_labelPrecision, Gtk::PACK_SHRINK, 4);
 186     vbox3->pack_start(*hbox6, Gtk::PACK_SHRINK, 0);
 187     vbox3->pack_start(*hbox5);
 188     vbox3->pack_start(*_embedImagesCheck, Gtk::PACK_SHRINK, 0);
 189     alignment4->add(*vbox3);
 190     _labelImportSettings->set_alignment(0.5,0.5);
 191     _labelImportSettings->set_padding(0,0);
 192     _labelImportSettings->set_justify(Gtk::JUSTIFY_LEFT);
 193     _labelImportSettings->set_line_wrap(false);
 194     _labelImportSettings->set_use_markup(true);
 195     _labelImportSettings->set_selectable(false);
 196     _importSettingsFrame->set_border_width(4);
 197     _importSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 198     _importSettingsFrame->set_label_align(0,0.5);
 199     _importSettingsFrame->add(*alignment4);
 200     _importSettingsFrame->set_label_widget(*_labelImportSettings);
 201     vbox1->pack_start(*_pageSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 202     vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 203     hbox1->pack_start(*vbox1);
 204     hbox1->pack_start(*_previewArea, Gtk::PACK_EXPAND_WIDGET, 4);
 205     this->get_vbox()->set_homogeneous(false);
 206     this->get_vbox()->set_spacing(0);
 207     this->get_vbox()->pack_start(*hbox1);
 208     this->set_title(_("PDF Import Settings"));
 209     this->set_modal(true);
 210     this->property_window_position().set_value(Gtk::WIN_POS_NONE);
 211     this->set_resizable(true);
 212     this->property_destroy_with_parent().set_value(false);
 213     this->set_has_separator(true);
 214     this->add_action_widget(*cancelbutton, -6);
 215     this->add_action_widget(*okbutton, -5);
 216     cancelbutton->show();
 217     okbutton->show();
 218     _labelSelect->show();
 219     _pageNumberSpin->show();
 220     hbox2->show();
 221     _cropCheck->show();
 222     _cropTypeCombo->show();
 223     hbox3->show();
 224     vbox2->show();
 225     alignment3->show();
 226     _labelPageSettings->show();
 227     _pageSettingsFrame->show();
 228     _labelPrecision->show();
 229     _fallbackPrecisionSlider->show();
 230     _labelPrecisionComment->show();
 231     hbox6->show();
 232     _labelText->show();
 233     _textHandlingCombo->show();
 234     hbox5->show();
 235     _embedImagesCheck->show();
 236     vbox3->show();
 237     alignment4->show();
 238     _labelImportSettings->show();
 239     _importSettingsFrame->show();
 240     vbox1->show();
 241     _previewArea->show();
 242     hbox1->show();
 243
 244     // Connect signals
 245     _previewArea->signal_expose_event().connect(sigc::mem_fun(*this, &PdfImportDialog::_onExposePreview));
 246     _pageNumberSpin_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPageNumberChanged));
 247     _cropCheck->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleCropping));
 248     _fallbackPrecisionSlider_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPrecisionChanged));
 249
 250     _render_thumb = false;
 251 #ifdef HAVE_POPPLER_CAIRO
 252     // Create an OutputDev
 253     _preview_output_dev = new CairoOutputDev();
 254     _preview_output_dev->startDoc(_pdf_doc->getXRef());
 255     _cairo_surface = NULL;
 256     _render_thumb = true;
 257 #endif
 258
 259     // Set default preview size
 260     _preview_width = 200;
 261     _preview_height = 300;
 262
 263     // Init preview
 264     _thumb_data = NULL;
 265     _pageNumberSpin_adj->set_value(1.0);
 266 }
 267
 268 PdfImportDialog::~PdfImportDialog() {
 269 #ifdef HAVE_POPPLER_CAIRO
 270     if (_preview_output_dev) {
 271         delete _preview_output_dev;
 272     }
 273     if (_cairo_surface) {
 274         cairo_surface_destroy(_cairo_surface);
 275     }
 276 #endif
 277     if (_thumb_data) {
 278         if (_render_thumb) {
 279             delete _thumb_data;
 280         } else {
 281             gfree(_thumb_data);
 282         }
 283     }
 284 }
 285
 286 bool PdfImportDialog::showDialog() {
 287     show();
 288     gint b = run();
 289     hide();
 290     if ( b == Gtk::RESPONSE_OK ) {
 291         return TRUE;
 292     } else {
 293         return FALSE;
 294     }
 295 }
 296
 297 int PdfImportDialog::getSelectedPage() {
 298     return _current_page;
 299 }
 300
 301 /**
 302  * \brief Retrieves the current settings into a repr which SvgBuilder will use
 303  *        for determining the behaviour desired by the user
 304  */
 305 void PdfImportDialog::getImportSettings(Inkscape::XML::Node *prefs) {
 306     sp_repr_set_svg_double(prefs, "selectedPage", (double)_current_page);
 307     if (_cropCheck->get_active()) {
 308         Glib::ustring current_choice = _cropTypeCombo->get_active_text();
 309         int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
 310         int i = 0;
 311         for ( ; i < num_crop_choices ; i++ ) {
 312             if ( current_choice == crop_setting_choices[i] ) {
 313                 break;
 314             }
 315         }
 316         sp_repr_set_svg_double(prefs, "cropTo", (double)i);
 317     } else {
 318         sp_repr_set_svg_double(prefs, "cropTo", -1.0);
 319     }
 320     sp_repr_set_svg_double(prefs, "approximationPrecision",
 321                            _fallbackPrecisionSlider->get_value());
 322     if (_embedImagesCheck->get_active()) {
 323         prefs->setAttribute("embedImages", "1");
 324     } else {
 325         prefs->setAttribute("embedImages", "0");
 326     }
 327 }
 328
 329 /**
 330  * \brief Redisplay the comment on the current approximation precision setting
 331  * Evenly divides the interval of possible values between the available labels.
 332  */
 333 void PdfImportDialog::_onPrecisionChanged() {
 334
 335     static Glib::ustring precision_comments[] = {
 336         Glib::ustring(_("rough")),
 337         Glib::ustring(_("medium")),
 338         Glib::ustring(_("fine")),
 339         Glib::ustring(_("very fine"))
 340     };
 341
 342     double min = _fallbackPrecisionSlider_adj->get_lower();
 343     double max = _fallbackPrecisionSlider_adj->get_upper();
 344     int num_intervals = sizeof(precision_comments) / sizeof(precision_comments[0]);
 345     double interval_len = ( max - min ) / (double)num_intervals;
 346     double value = _fallbackPrecisionSlider_adj->get_value();
 347     int comment_idx = (int)floor( ( value - min ) / interval_len );
 348     _labelPrecisionComment->set_label(precision_comments[comment_idx]);
 349 }
 350
 351 void PdfImportDialog::_onToggleCropping() {
 352     _cropTypeCombo->set_sensitive(_cropCheck->get_active());
 353 }
 354
 355 void PdfImportDialog::_onPageNumberChanged() {
 356     int page = _pageNumberSpin->get_value_as_int();
 357     _current_page = CLAMP(page, 1, _pdf_doc->getCatalog()->getNumPages());
 358     _setPreviewPage(_current_page);
 359 }
 360
 361 #ifdef HAVE_POPPLER_CAIRO
 362 /**
 363  * \brief Copies image data from a Cairo surface to a pixbuf
 364  *
 365  * Borrowed from libpoppler, from the file poppler-page.cc
 366  * Copyright (C) 2005, Red Hat, Inc.
 367  *
 368  */
 369 static void copy_cairo_surface_to_pixbuf (cairo_surface_t *surface,
 370                                           unsigned char   *data,
 371                                           GdkPixbuf       *pixbuf)
 372 {
 373     int cairo_width, cairo_height, cairo_rowstride;
 374     unsigned char *pixbuf_data, *dst, *cairo_data;
 375     int pixbuf_rowstride, pixbuf_n_channels;
 376     unsigned int *src;
 377     int x, y;
 378
 379     cairo_width = cairo_image_surface_get_width (surface);
 380     cairo_height = cairo_image_surface_get_height (surface);
 381     cairo_rowstride = cairo_width * 4;
 382     cairo_data = data;
 383
 384     pixbuf_data = gdk_pixbuf_get_pixels (pixbuf);
 385     pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 386     pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
 387
 388     if (cairo_width > gdk_pixbuf_get_width (pixbuf))
 389         cairo_width = gdk_pixbuf_get_width (pixbuf);
 390     if (cairo_height > gdk_pixbuf_get_height (pixbuf))
 391         cairo_height = gdk_pixbuf_get_height (pixbuf);
 392     for (y = 0; y < cairo_height; y++)
 393     {
 394         src = (unsigned int *) (cairo_data + y * cairo_rowstride);
 395         dst = pixbuf_data + y * pixbuf_rowstride;
 396         for (x = 0; x < cairo_width; x++)
 397         {
 398             dst[0] = (*src >> 16) & 0xff;
 399             dst[1] = (*src >> 8) & 0xff;
 400             dst[2] = (*src >> 0) & 0xff;
 401             if (pixbuf_n_channels == 4)
 402                 dst[3] = (*src >> 24) & 0xff;
 403             dst += pixbuf_n_channels;
 404             src++;
 405         }
 406     }
 407 }
 408 #endif
 409
 410 /**
 411  * \brief Updates the preview area with the previously rendered thumbnail
 412  */
 413 bool PdfImportDialog::_onExposePreview(GdkEventExpose *event) {
 414
 415     // Check if we have a thumbnail at all
 416     if (!_thumb_data) {
 417         return true;
 418     }
 419
 420     // Create the pixbuf for the thumbnail
 421     Glib::RefPtr<Gdk::Pixbuf> thumb;
 422     if (_render_thumb) {
 423         thumb = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true,
 424                                     8, _thumb_width, _thumb_height);
 425     } else {
 426         thumb = Gdk::Pixbuf::create_from_data(_thumb_data, Gdk::COLORSPACE_RGB,
 427             false, 8, _thumb_width, _thumb_height, _thumb_rowstride);
 428     }
 429     if (!thumb) {
 430         return true;
 431     }
 432
 433     // Set background to white
 434     if (_render_thumb) {
 435         thumb->fill(0xffffffff);
 436         Glib::RefPtr<Gdk::Pixmap> back_pixmap = Gdk::Pixmap::create(
 437                 _previewArea->get_window(), _thumb_width, _thumb_height, -1);
 438         if (!back_pixmap) {
 439             return true;
 440         }
 441         back_pixmap->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb, 0, 0, 0, 0,
 442                                  _thumb_width, _thumb_height,
 443                                  Gdk::RGB_DITHER_NONE, 0, 0);
 444         _previewArea->get_window()->set_back_pixmap(back_pixmap, false);
 445         _previewArea->get_window()->clear();
 446     }
 447 #ifdef HAVE_POPPLER_CAIRO
 448     // Copy the thumbnail image from the Cairo surface
 449     if (_render_thumb) {
 450         copy_cairo_surface_to_pixbuf(_cairo_surface, _thumb_data, thumb->gobj());
 451     }
 452 #endif
 453     _previewArea->get_window()->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb,
 454                                             0, 0, 0, _render_thumb ? 0 : 20,
 455                                             -1, -1, Gdk::RGB_DITHER_NONE, 0, 0);
 456
 457     return true;
 458 }
 459
 460 /**
 461  * \brief Renders the given page's thumbnail using Cairo
 462  */
 463 void PdfImportDialog::_setPreviewPage(int page) {
 464
 465     _previewed_page = _pdf_doc->getCatalog()->getPage(page);
 466     // Try to get a thumbnail from the PDF if possible
 467     if (!_render_thumb) {
 468         if (_thumb_data) {
 469             gfree(_thumb_data);
 470             _thumb_data = NULL;
 471         }
 472         if (!_previewed_page->loadThumb(&_thumb_data,
 473              &_thumb_width, &_thumb_height, &_thumb_rowstride)) {
 474             return;
 475         }
 476         // Redraw preview area
 477         _previewArea->set_size_request(_thumb_width, _thumb_height + 20);
 478         _previewArea->queue_draw();
 479         return;
 480     }
 481 #ifdef HAVE_POPPLER_CAIRO
 482     // Get page size by accounting for rotation
 483     double width, height;
 484     int rotate = _previewed_page->getRotate();
 485     if ( rotate == 90 || rotate == 270 ) {
 486         height = _previewed_page->getCropWidth();
 487         width = _previewed_page->getCropHeight();
 488     } else {
 489         width = _previewed_page->getCropWidth();
 490         height = _previewed_page->getCropHeight();
 491     }
 492     // Calculate the needed scaling for the page
 493     double scale_x = (double)_preview_width / width;
 494     double scale_y = (double)_preview_height / height;
 495     double scale_factor = ( scale_x > scale_y ) ? scale_y : scale_x;
 496     // Create new Cairo surface
 497     _thumb_width = (int)ceil( width * scale_factor );
 498     _thumb_height = (int)ceil( height * scale_factor );
 499     _thumb_rowstride = _thumb_width * 4;
 500     if (_thumb_data) {
 501         delete _thumb_data;
 502     }
 503     _thumb_data = new unsigned char[ _thumb_rowstride * _thumb_height ];
 504     if (_cairo_surface) {
 505         cairo_surface_destroy(_cairo_surface);
 506     }
 507     _cairo_surface = cairo_image_surface_create_for_data(_thumb_data,
 508             CAIRO_FORMAT_ARGB32, _thumb_width, _thumb_height, _thumb_rowstride);
 509     cairo_t *cr = cairo_create(_cairo_surface);
 510     cairo_scale(cr, scale_factor, scale_factor);    // Use Cairo for resizing the image
 511     _preview_output_dev->setCairo(cr);
 512     // Render page
 513     _previewed_page->displaySlice(_preview_output_dev,
 514                        72.0, 72.0, 0,
 515                        FALSE, /* useMediaBox */
 516                        TRUE, /* crop */
 517                        0, 0,
 518                        (int)ceil(_previewed_page->getCropWidth()),
 519                        (int)ceil(_previewed_page->getCropHeight()),
 520                        FALSE, /* printing */
 521                        _pdf_doc->getCatalog());
 522     // Clean up
 523     _preview_output_dev->setCairo(NULL);
 524     cairo_destroy(cr);
 525     // Redraw preview area
 526     _previewArea->set_size_request(_preview_width, _preview_height);
 527     _previewArea->queue_draw();
 528 #endif
 529 }
 530
 531 ////////////////////////////////////////////////////////////////////////////////
 532
 533 /**
 534  * Parses the selected page of the given PDF document using PdfParser.
 535  */
 536 SPDocument *
 537 PdfInput::open(::Inkscape::Extension::Input * mod, const gchar * uri) {
 538
 539     // Initialize the globalParams variable for poppler
 540     if (!globalParams) {
 541         globalParams = new GlobalParams();
 542     }
 543     GooString *filename_goo = new GooString(uri);
 544     PDFDoc *pdf_doc = new PDFDoc(filename_goo, NULL, NULL, NULL);   // TODO: Could ask for password
 545     if (!pdf_doc->isOk()) {
 546         int error = pdf_doc->getErrorCode();
 547         delete pdf_doc;
 548         if (error == errEncrypted) {
 549             g_message("Document is encrypted.");
 550         } else {
 551             g_message("Failed to load document from data (error %d)", error);
 552         }
 553
 554         return NULL;
 555     }
 556     PdfImportDialog *dlg = new PdfImportDialog(pdf_doc);
 557     if (!dlg->showDialog()) {
 558         delete dlg;
 559         delete pdf_doc;
 560
 561         return NULL;
 562     }
 563
 564     // Get needed page
 565     int page_num = dlg->getSelectedPage();
 566     Catalog *catalog = pdf_doc->getCatalog();
 567     Page *page = catalog->getPage(page_num);
 568
 569     SPDocument *doc = sp_document_new(NULL, TRUE, TRUE);
 570     bool saved = sp_document_get_undo_sensitive(doc);
 571     sp_document_set_undo_sensitive(doc, false); // No need to undo in this temporary document
 572
 573     // Create builder
 574     gchar *docname = g_path_get_basename(uri);
 575     gchar *dot = g_strrstr(docname, ".");
 576     if (dot) {
 577         *dot = 0;
 578     }
 579     SvgBuilder *builder = new SvgBuilder(doc, docname, pdf_doc->getXRef());
 580
 581     // Get preferences
 582     Inkscape::XML::Node *prefs = builder->getPreferences();
 583     dlg->getImportSettings(prefs);
 584
 585     // Apply crop settings
 586     PDFRectangle *clipToBox = NULL;
 587     double crop_setting;
 588     sp_repr_get_double(prefs, "cropTo", &crop_setting);
 589     if ( crop_setting >= 0.0 ) {    // Do page clipping
 590         int crop_choice = (int)crop_setting;
 591         switch (crop_choice) {
 592             case 0: // Media box
 593                 clipToBox = page->getMediaBox();
 594                 break;
 595             case 1: // Crop box
 596                 clipToBox = page->getCropBox();
 597                 break;
 598             case 2: // Bleed box
 599                 clipToBox = page->getBleedBox();
 600                 break;
 601             case 3: // Trim box
 602                 clipToBox = page->getTrimBox();
 603                 break;
 604             case 4: // Art box
 605                 clipToBox = page->getArtBox();
 606                 break;
 607             default:
 608                 break;
 609         }
 610     }
 611
 612     // Create parser
 613     PdfParser *pdf_parser = new PdfParser(pdf_doc->getXRef(), builder, page_num-1, page->getRotate(),
 614                                           page->getResourceDict(), page->getCropBox(), clipToBox);
 615
 616     // Set up approximation precision for parser
 617     double color_delta;
 618     sp_repr_get_double(prefs, "approximationPrecision", &color_delta);
 619     if ( color_delta <= 0.0 ) {
 620         color_delta = 1.0 / 2.0;
 621     } else {
 622         color_delta = 1.0 / color_delta;
 623     }
 624     for ( int i = 1 ; i <= pdfNumShadingTypes ; i++ ) {
 625         pdf_parser->setApproximationPrecision(i, color_delta, 6);
 626     }
 627
 628     // Parse the document structure
 629     Object obj;
 630     page->getContents(&obj);
 631     if (!obj.isNull()) {
 632         pdf_parser->parse(&obj);
 633     }
 634
 635     // Cleanup
 636     obj.free();
 637     delete pdf_parser;
 638     delete builder;
 639     g_free(docname);
 640     delete pdf_doc;
 641
 642     // Restore undo
 643     sp_document_set_undo_sensitive(doc, saved);
 644
 645     return doc;
 646 }
 647
 648 #include "../clear-n_.h"
 649
 650 void
 651 PdfInput::init(void) {
 652     Inkscape::Extension::Extension * ext;
 653
 654     /* PDF in */
 655     ext = Inkscape::Extension::build_from_mem(
 656         "<inkscape-extension>\n"
 657             "<name>PDF Input</name>\n"
 658             "<id>org.inkscape.input.pdf</id>\n"
 659             "<input>\n"
 660                 "<extension>.pdf</extension>\n"
 661                 "<mimetype>application/pdf</mimetype>\n"
 662                 "<filetypename>Adobe PDF (*.pdf) [via poppler]</filetypename>\n"
 663                 "<filetypetooltip>Adobe Portable Document Format</filetypetooltip>\n"
 664             "</input>\n"
 665         "</inkscape-extension>", new PdfInput());
 666
 667     /* AI in */
 668     ext = Inkscape::Extension::build_from_mem(
 669         "<inkscape-extension>\n"
 670             "<name>AI Input</name>\n"
 671             "<id>org.inkscape.input.ai</id>\n"
 672             "<input>\n"
 673                 "<extension>.ai</extension>\n"
 674                 "<mimetype>image/x-adobe-illustrator</mimetype>\n"
 675                 "<filetypename>Adobe Illustrator (*.ai) [PDF-based]</filetypename>\n"
 676                 "<filetypetooltip>Open files saved with recent versions of Adobe Illustrator</filetypetooltip>\n"
 677             "</input>\n"
 678         "</inkscape-extension>", new PdfInput());
 679 } // init
 680
 681 } } }  /* namespace Inkscape, Extension, Implementation */
 682
 683 #endif /* HAVE_POPPLER */
 684
 685 /*
 686   Local Variables:
 687   mode:c++
 688   c-file-style:"stroustrup"
 689   c-file-offsets:((innamespace . 0)(inline-open . 0))
 690   indent-tabs-mode:nil
 691   fill-column:99
 692   End:
 693 */
 694 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :