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 #ifdef HAVE_POPPLER_CAIRO
  27 #include <poppler/glib/poppler.h>
  28 #include <poppler/glib/poppler-document.h>
  29 #include <poppler/glib/poppler-page.h>
  30 #endif
  31
  32 #include "pdf-input.h"
  33 #include "extension/system.h"
  34 #include "extension/input.h"
  35 #include "svg-builder.h"
  36 #include "pdf-parser.h"
  37
  38 #include "document-private.h"
  39
  40 #include "dialogs/dialog-events.h"
  41 #include <gtk/gtkdialog.h>
  42
  43 namespace Inkscape {
  44 namespace Extension {
  45 namespace Internal {
  46
  47 /**
  48  * \brief The PDF import dialog
  49  * FIXME: Probably this should be placed into src/ui/dialog
  50  */
  51
  52 static const gchar * crop_setting_choices[] = {
  53         //TRANSLATORS: The following are document crop settings for PDF import
  54         // more info: http://www.acrobatusers.com/tech_corners/javascript_corner/tips/2006/page_bounds/
  55     N_("media box"),
  56     N_("crop box"),
  57     N_("trim box"),
  58     N_("bleed box"),
  59     N_("art box")
  60 };
  61
  62 PdfImportDialog::PdfImportDialog(PDFDoc *doc, const gchar *uri)
  63 {
  64 #ifdef HAVE_POPPLER_CAIRO
  65     _poppler_doc = NULL;
  66 #endif // HAVE_POPPLER_CAIRO
  67     _pdf_doc = doc;
  68
  69     cancelbutton = Gtk::manage(new class Gtk::Button(Gtk::StockID("gtk-cancel")));
  70     okbutton = Gtk::manage(new class Gtk::Button(Gtk::StockID("gtk-ok")));
  71     _labelSelect = Gtk::manage(new class Gtk::Label(_("Select page:")));
  72
  73     // Page number
  74     Gtk::Adjustment *_pageNumberSpin_adj = Gtk::manage(
  75             new class Gtk::Adjustment(1, 1, _pdf_doc->getNumPages(), 1, 10, 0));
  76     _pageNumberSpin = Gtk::manage(new class Gtk::SpinButton(*_pageNumberSpin_adj, 1, 1));
  77     _labelTotalPages = Gtk::manage(new class Gtk::Label());
  78     hbox2 = Gtk::manage(new class Gtk::HBox(false, 0));
  79     // Disable the page selector when there's only one page
  80     int num_pages = _pdf_doc->getCatalog()->getNumPages();
  81     if ( num_pages == 1 ) {
  82         _pageNumberSpin->set_sensitive(false);
  83     } else {
  84         // Display total number of pages
  85         gchar *label_text = g_strdup_printf(_("out of %i"), num_pages);
  86         _labelTotalPages->set_label(label_text);
  87         g_free(label_text);
  88     }
  89
  90     // Crop settings
  91     _cropCheck = Gtk::manage(new class Gtk::CheckButton(_("Clip to:")));
  92     _cropTypeCombo = Gtk::manage(new class Gtk::ComboBoxText());
  93     int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
  94     for ( int i = 0 ; i < num_crop_choices ; i++ ) {
  95         _cropTypeCombo->append_text(_(crop_setting_choices[i]));
  96     }
  97     _cropTypeCombo->set_active_text(_(crop_setting_choices[0]));
  98     _cropTypeCombo->set_sensitive(false);
  99
 100     hbox3 = Gtk::manage(new class Gtk::HBox(false, 4));
 101     vbox2 = Gtk::manage(new class Gtk::VBox(false, 4));
 102     alignment3 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
 103     _labelPageSettings = Gtk::manage(new class Gtk::Label(_("Page settings")));
 104     _pageSettingsFrame = Gtk::manage(new class Gtk::Frame());
 105     _labelPrecision = Gtk::manage(new class Gtk::Label(_("Precision of approximating gradient meshes:")));
 106     _labelPrecisionWarning = Gtk::manage(new class Gtk::Label(_("<b>Note</b>: setting the precision too high may result in a large SVG file and slow performance.")));
 107
 108     _fallbackPrecisionSlider_adj = Gtk::manage(new class Gtk::Adjustment(2, 1, 256, 1, 10, 10));
 109     _fallbackPrecisionSlider = Gtk::manage(new class Gtk::HScale(*_fallbackPrecisionSlider_adj));
 110     _fallbackPrecisionSlider->set_value(2.0);
 111     _labelPrecisionComment = Gtk::manage(new class Gtk::Label(_("rough")));
 112     hbox6 = Gtk::manage(new class Gtk::HBox(false, 4));
 113
 114     // Text options
 115     _labelText = Gtk::manage(new class Gtk::Label(_("Text handling:")));
 116     _textHandlingCombo = Gtk::manage(new class Gtk::ComboBoxText());
 117     _textHandlingCombo->append_text(_("Import text as text"));
 118     _textHandlingCombo->set_active_text(_("Import text as text"));
 119
 120     hbox5 = Gtk::manage(new class Gtk::HBox(false, 4));
 121     _embedImagesCheck = Gtk::manage(new class Gtk::CheckButton(_("Embed images")));
 122     vbox3 = Gtk::manage(new class Gtk::VBox(false, 4));
 123     alignment4 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
 124     _labelImportSettings = Gtk::manage(new class Gtk::Label(_("Import settings")));
 125     _importSettingsFrame = Gtk::manage(new class Gtk::Frame());
 126     vbox1 = Gtk::manage(new class Gtk::VBox(false, 4));
 127     _previewArea = Gtk::manage(new class Gtk::DrawingArea());
 128     hbox1 = Gtk::manage(new class Gtk::HBox(false, 4));
 129     cancelbutton->set_flags(Gtk::CAN_FOCUS);
 130     cancelbutton->set_flags(Gtk::CAN_DEFAULT);
 131     cancelbutton->set_relief(Gtk::RELIEF_NORMAL);
 132     okbutton->set_flags(Gtk::CAN_FOCUS);
 133     okbutton->set_flags(Gtk::CAN_DEFAULT);
 134     okbutton->set_relief(Gtk::RELIEF_NORMAL);
 135     this->get_action_area()->property_layout_style().set_value(Gtk::BUTTONBOX_END);
 136     _labelSelect->set_alignment(0.5,0.5);
 137     _labelSelect->set_padding(4,0);
 138     _labelSelect->set_justify(Gtk::JUSTIFY_LEFT);
 139     _labelSelect->set_line_wrap(false);
 140     _labelSelect->set_use_markup(false);
 141     _labelSelect->set_selectable(false);
 142     _pageNumberSpin->set_flags(Gtk::CAN_FOCUS);
 143     _pageNumberSpin->set_update_policy(Gtk::UPDATE_ALWAYS);
 144     _pageNumberSpin->set_numeric(true);
 145     _pageNumberSpin->set_digits(0);
 146     _pageNumberSpin->set_wrap(false);
 147     _labelTotalPages->set_alignment(0.5,0.5);
 148     _labelTotalPages->set_padding(4,0);
 149     _labelTotalPages->set_justify(Gtk::JUSTIFY_LEFT);
 150     _labelTotalPages->set_line_wrap(false);
 151     _labelTotalPages->set_use_markup(false);
 152     _labelTotalPages->set_selectable(false);
 153     hbox2->pack_start(*_labelSelect, Gtk::PACK_SHRINK, 4);
 154     hbox2->pack_start(*_pageNumberSpin, Gtk::PACK_SHRINK, 4);
 155     hbox2->pack_start(*_labelTotalPages, Gtk::PACK_SHRINK, 4);
 156     _cropCheck->set_flags(Gtk::CAN_FOCUS);
 157     _cropCheck->set_relief(Gtk::RELIEF_NORMAL);
 158     _cropCheck->set_mode(true);
 159     _cropCheck->set_active(false);
 160     _cropTypeCombo->set_border_width(1);
 161     hbox3->pack_start(*_cropCheck, Gtk::PACK_SHRINK, 4);
 162     hbox3->pack_start(*_cropTypeCombo, Gtk::PACK_SHRINK, 0);
 163     vbox2->pack_start(*hbox2);
 164     vbox2->pack_start(*hbox3);
 165     alignment3->add(*vbox2);
 166     _labelPageSettings->set_alignment(0.5,0.5);
 167     _labelPageSettings->set_padding(4,0);
 168     _labelPageSettings->set_justify(Gtk::JUSTIFY_LEFT);
 169     _labelPageSettings->set_line_wrap(false);
 170     _labelPageSettings->set_use_markup(true);
 171     _labelPageSettings->set_selectable(false);
 172     _pageSettingsFrame->set_border_width(4);
 173     _pageSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 174     _pageSettingsFrame->set_label_align(0,0.5);
 175     _pageSettingsFrame->add(*alignment3);
 176     _pageSettingsFrame->set_label_widget(*_labelPageSettings);
 177     _labelPrecision->set_alignment(0,0.5);
 178     _labelPrecision->set_padding(4,0);
 179     _labelPrecision->set_justify(Gtk::JUSTIFY_LEFT);
 180     _labelPrecision->set_line_wrap(true);
 181     _labelPrecision->set_use_markup(false);
 182     _labelPrecision->set_selectable(false);
 183     _labelPrecisionWarning->set_alignment(0,0.5);
 184     _labelPrecisionWarning->set_padding(4,0);
 185     _labelPrecisionWarning->set_justify(Gtk::JUSTIFY_LEFT);
 186     _labelPrecisionWarning->set_line_wrap(true);
 187     _labelPrecisionWarning->set_use_markup(true);
 188     _labelPrecisionWarning->set_selectable(false);
 189     _fallbackPrecisionSlider->set_size_request(180,-1);
 190     _fallbackPrecisionSlider->set_flags(Gtk::CAN_FOCUS);
 191     _fallbackPrecisionSlider->set_update_policy(Gtk::UPDATE_CONTINUOUS);
 192     _fallbackPrecisionSlider->set_inverted(false);
 193     _fallbackPrecisionSlider->set_digits(1);
 194     _fallbackPrecisionSlider->set_draw_value(true);
 195     _fallbackPrecisionSlider->set_value_pos(Gtk::POS_TOP);
 196     _labelPrecisionComment->set_size_request(90,-1);
 197     _labelPrecisionComment->set_alignment(0.5,0.5);
 198     _labelPrecisionComment->set_padding(4,0);
 199     _labelPrecisionComment->set_justify(Gtk::JUSTIFY_LEFT);
 200     _labelPrecisionComment->set_line_wrap(false);
 201     _labelPrecisionComment->set_use_markup(false);
 202     _labelPrecisionComment->set_selectable(false);
 203     hbox6->pack_start(*_fallbackPrecisionSlider, Gtk::PACK_SHRINK, 4);
 204     hbox6->pack_start(*_labelPrecisionComment, Gtk::PACK_SHRINK, 0);
 205     _labelText->set_alignment(0.5,0.5);
 206     _labelText->set_padding(4,0);
 207     _labelText->set_justify(Gtk::JUSTIFY_LEFT);
 208     _labelText->set_line_wrap(false);
 209     _labelText->set_use_markup(false);
 210     _labelText->set_selectable(false);
 211     hbox5->pack_start(*_labelText, Gtk::PACK_SHRINK, 0);
 212     hbox5->pack_start(*_textHandlingCombo, Gtk::PACK_SHRINK, 0);
 213     _embedImagesCheck->set_flags(Gtk::CAN_FOCUS);
 214     _embedImagesCheck->set_relief(Gtk::RELIEF_NORMAL);
 215     _embedImagesCheck->set_mode(true);
 216     _embedImagesCheck->set_active(true);
 217     vbox3->pack_start(*_labelPrecision, Gtk::PACK_SHRINK, 0);
 218     vbox3->pack_start(*hbox6, Gtk::PACK_SHRINK, 0);
 219     vbox3->pack_start(*_labelPrecisionWarning, Gtk::PACK_SHRINK, 0);
 220     vbox3->pack_start(*hbox5, Gtk::PACK_SHRINK, 4);
 221     vbox3->pack_start(*_embedImagesCheck, Gtk::PACK_SHRINK, 0);
 222     alignment4->add(*vbox3);
 223     _labelImportSettings->set_alignment(0.5,0.5);
 224     _labelImportSettings->set_padding(4,0);
 225     _labelImportSettings->set_justify(Gtk::JUSTIFY_LEFT);
 226     _labelImportSettings->set_line_wrap(false);
 227     _labelImportSettings->set_use_markup(true);
 228     _labelImportSettings->set_selectable(false);
 229     _importSettingsFrame->set_border_width(4);
 230     _importSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 231     _importSettingsFrame->set_label_align(0,0.5);
 232     _importSettingsFrame->add(*alignment4);
 233     _importSettingsFrame->set_label_widget(*_labelImportSettings);
 234     vbox1->pack_start(*_pageSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 235     vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 236     hbox1->pack_start(*vbox1);
 237     hbox1->pack_start(*_previewArea, Gtk::PACK_EXPAND_WIDGET, 4);
 238     this->get_vbox()->set_homogeneous(false);
 239     this->get_vbox()->set_spacing(0);
 240     this->get_vbox()->pack_start(*hbox1);
 241     this->set_title(_("PDF Import Settings"));
 242     this->set_modal(true);
 243     sp_transientize((GtkWidget *)this->gobj());  //Make transient
 244     this->property_window_position().set_value(Gtk::WIN_POS_NONE);
 245     this->set_resizable(true);
 246     this->property_destroy_with_parent().set_value(false);
 247     this->set_has_separator(true);
 248     this->add_action_widget(*cancelbutton, -6);
 249     this->add_action_widget(*okbutton, -5);
 250     cancelbutton->show();
 251     okbutton->show();
 252     _labelSelect->show();
 253     _pageNumberSpin->show();
 254     _labelTotalPages->show();
 255     hbox2->show();
 256     _cropCheck->show();
 257     _cropTypeCombo->show();
 258     hbox3->show();
 259     vbox2->show();
 260     alignment3->show();
 261     _labelPageSettings->show();
 262     _pageSettingsFrame->show();
 263     _labelPrecision->show();
 264     _labelPrecisionWarning->show();
 265     _fallbackPrecisionSlider->show();
 266     _labelPrecisionComment->show();
 267     hbox6->show();
 268     _labelText->show();
 269     _textHandlingCombo->show();
 270     hbox5->show();
 271     _embedImagesCheck->show();
 272     vbox3->show();
 273     alignment4->show();
 274     _labelImportSettings->show();
 275     _importSettingsFrame->show();
 276     vbox1->show();
 277     _previewArea->show();
 278     hbox1->show();
 279
 280     // Connect signals
 281     _previewArea->signal_expose_event().connect(sigc::mem_fun(*this, &PdfImportDialog::_onExposePreview));
 282     _pageNumberSpin_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPageNumberChanged));
 283     _cropCheck->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleCropping));
 284     _fallbackPrecisionSlider_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPrecisionChanged));
 285
 286     _render_thumb = false;
 287 #ifdef HAVE_POPPLER_CAIRO
 288     _cairo_surface = NULL;
 289     _render_thumb = true;
 290     // Create PopplerDocument
 291     gchar *doc_uri = g_filename_to_uri(uri, NULL, NULL);
 292     if (doc_uri) {
 293         _poppler_doc = poppler_document_new_from_file(doc_uri, NULL, NULL);
 294         g_free(doc_uri);
 295     }
 296 #endif
 297
 298     // Set default preview size
 299     _preview_width = 200;
 300     _preview_height = 300;
 301
 302     // Init preview
 303     _thumb_data = NULL;
 304     _pageNumberSpin_adj->set_value(1.0);
 305     _current_page = 1;
 306     _setPreviewPage(_current_page);
 307
 308     set_default (*okbutton);
 309     set_focus (*okbutton);
 310 }
 311
 312 PdfImportDialog::~PdfImportDialog() {
 313 #ifdef HAVE_POPPLER_CAIRO
 314     if (_cairo_surface) {
 315         cairo_surface_destroy(_cairo_surface);
 316     }
 317     if (_poppler_doc) {
 318         g_object_unref(G_OBJECT(_poppler_doc));
 319     }
 320 #endif
 321     if (_thumb_data) {
 322         if (_render_thumb) {
 323             delete _thumb_data;
 324         } else {
 325             gfree(_thumb_data);
 326         }
 327     }
 328 }
 329
 330 bool PdfImportDialog::showDialog() {
 331     show();
 332     gint b = run();
 333     hide();
 334     if ( b == Gtk::RESPONSE_OK ) {
 335         return TRUE;
 336     } else {
 337         return FALSE;
 338     }
 339 }
 340
 341 int PdfImportDialog::getSelectedPage() {
 342     return _current_page;
 343 }
 344
 345 /**
 346  * \brief Retrieves the current settings into a repr which SvgBuilder will use
 347  *        for determining the behaviour desired by the user
 348  */
 349 void PdfImportDialog::getImportSettings(Inkscape::XML::Node *prefs) {
 350     sp_repr_set_svg_double(prefs, "selectedPage", (double)_current_page);
 351     if (_cropCheck->get_active()) {
 352         Glib::ustring current_choice = _cropTypeCombo->get_active_text();
 353         int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
 354         int i = 0;
 355         for ( ; i < num_crop_choices ; i++ ) {
 356             if ( current_choice == _(crop_setting_choices[i]) ) {
 357                 break;
 358             }
 359         }
 360         sp_repr_set_svg_double(prefs, "cropTo", (double)i);
 361     } else {
 362         sp_repr_set_svg_double(prefs, "cropTo", -1.0);
 363     }
 364     sp_repr_set_svg_double(prefs, "approximationPrecision",
 365                            _fallbackPrecisionSlider->get_value());
 366     if (_embedImagesCheck->get_active()) {
 367         prefs->setAttribute("embedImages", "1");
 368     } else {
 369         prefs->setAttribute("embedImages", "0");
 370     }
 371 }
 372
 373 /**
 374  * \brief Redisplay the comment on the current approximation precision setting
 375  * Evenly divides the interval of possible values between the available labels.
 376  */
 377 void PdfImportDialog::_onPrecisionChanged() {
 378
 379     static Glib::ustring precision_comments[] = {
 380         Glib::ustring(_("rough")),
 381         Glib::ustring(Q_("pdfinput|medium")),
 382         Glib::ustring(_("fine")),
 383         Glib::ustring(_("very fine"))
 384     };
 385
 386     double min = _fallbackPrecisionSlider_adj->get_lower();
 387     double max = _fallbackPrecisionSlider_adj->get_upper();
 388     int num_intervals = sizeof(precision_comments) / sizeof(precision_comments[0]);
 389     double interval_len = ( max - min ) / (double)num_intervals;
 390     double value = _fallbackPrecisionSlider_adj->get_value();
 391     int comment_idx = (int)floor( ( value - min ) / interval_len );
 392     _labelPrecisionComment->set_label(precision_comments[comment_idx]);
 393 }
 394
 395 void PdfImportDialog::_onToggleCropping() {
 396     _cropTypeCombo->set_sensitive(_cropCheck->get_active());
 397 }
 398
 399 void PdfImportDialog::_onPageNumberChanged() {
 400     int page = _pageNumberSpin->get_value_as_int();
 401     _current_page = CLAMP(page, 1, _pdf_doc->getCatalog()->getNumPages());
 402     _setPreviewPage(_current_page);
 403 }
 404
 405 #ifdef HAVE_POPPLER_CAIRO
 406 /**
 407  * \brief Copies image data from a Cairo surface to a pixbuf
 408  *
 409  * Borrowed from libpoppler, from the file poppler-page.cc
 410  * Copyright (C) 2005, Red Hat, Inc.
 411  *
 412  */
 413 static void copy_cairo_surface_to_pixbuf (cairo_surface_t *surface,
 414                                           unsigned char   *data,
 415                                           GdkPixbuf       *pixbuf)
 416 {
 417     int cairo_width, cairo_height, cairo_rowstride;
 418     unsigned char *pixbuf_data, *dst, *cairo_data;
 419     int pixbuf_rowstride, pixbuf_n_channels;
 420     unsigned int *src;
 421     int x, y;
 422
 423     cairo_width = cairo_image_surface_get_width (surface);
 424     cairo_height = cairo_image_surface_get_height (surface);
 425     cairo_rowstride = cairo_width * 4;
 426     cairo_data = data;
 427
 428     pixbuf_data = gdk_pixbuf_get_pixels (pixbuf);
 429     pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 430     pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
 431
 432     if (cairo_width > gdk_pixbuf_get_width (pixbuf))
 433         cairo_width = gdk_pixbuf_get_width (pixbuf);
 434     if (cairo_height > gdk_pixbuf_get_height (pixbuf))
 435         cairo_height = gdk_pixbuf_get_height (pixbuf);
 436     for (y = 0; y < cairo_height; y++)
 437     {
 438         src = (unsigned int *) (cairo_data + y * cairo_rowstride);
 439         dst = pixbuf_data + y * pixbuf_rowstride;
 440         for (x = 0; x < cairo_width; x++)
 441         {
 442             dst[0] = (*src >> 16) & 0xff;
 443             dst[1] = (*src >> 8) & 0xff;
 444             dst[2] = (*src >> 0) & 0xff;
 445             if (pixbuf_n_channels == 4)
 446                 dst[3] = (*src >> 24) & 0xff;
 447             dst += pixbuf_n_channels;
 448             src++;
 449         }
 450     }
 451 }
 452
 453 #endif
 454
 455 /**
 456  * \brief Updates the preview area with the previously rendered thumbnail
 457  */
 458 bool PdfImportDialog::_onExposePreview(GdkEventExpose */*event*/) {
 459
 460     // Check if we have a thumbnail at all
 461     if (!_thumb_data) {
 462         return true;
 463     }
 464
 465     // Create the pixbuf for the thumbnail
 466     Glib::RefPtr<Gdk::Pixbuf> thumb;
 467     if (_render_thumb) {
 468         thumb = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true,
 469                                     8, _thumb_width, _thumb_height);
 470     } else {
 471         thumb = Gdk::Pixbuf::create_from_data(_thumb_data, Gdk::COLORSPACE_RGB,
 472             false, 8, _thumb_width, _thumb_height, _thumb_rowstride);
 473     }
 474     if (!thumb) {
 475         return true;
 476     }
 477
 478     // Set background to white
 479     if (_render_thumb) {
 480         thumb->fill(0xffffffff);
 481         Glib::RefPtr<Gdk::Pixmap> back_pixmap = Gdk::Pixmap::create(
 482                 _previewArea->get_window(), _thumb_width, _thumb_height, -1);
 483         if (!back_pixmap) {
 484             return true;
 485         }
 486         back_pixmap->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb, 0, 0, 0, 0,
 487                                  _thumb_width, _thumb_height,
 488                                  Gdk::RGB_DITHER_NONE, 0, 0);
 489         _previewArea->get_window()->set_back_pixmap(back_pixmap, false);
 490         _previewArea->get_window()->clear();
 491     }
 492 #ifdef HAVE_POPPLER_CAIRO
 493     // Copy the thumbnail image from the Cairo surface
 494     if (_render_thumb) {
 495         copy_cairo_surface_to_pixbuf(_cairo_surface, _thumb_data, thumb->gobj());
 496     }
 497 #endif
 498     _previewArea->get_window()->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb,
 499                                             0, 0, 0, _render_thumb ? 0 : 20,
 500                                             -1, -1, Gdk::RGB_DITHER_NONE, 0, 0);
 501
 502     return true;
 503 }
 504
 505 /**
 506  * \brief Renders the given page's thumbnail using Cairo
 507  */
 508 void PdfImportDialog::_setPreviewPage(int page) {
 509
 510     _previewed_page = _pdf_doc->getCatalog()->getPage(page);
 511     // Try to get a thumbnail from the PDF if possible
 512     if (!_render_thumb) {
 513         if (_thumb_data) {
 514             gfree(_thumb_data);
 515             _thumb_data = NULL;
 516         }
 517         if (!_previewed_page->loadThumb(&_thumb_data,
 518              &_thumb_width, &_thumb_height, &_thumb_rowstride)) {
 519             return;
 520         }
 521         // Redraw preview area
 522         _previewArea->set_size_request(_thumb_width, _thumb_height + 20);
 523         _previewArea->queue_draw();
 524         return;
 525     }
 526 #ifdef HAVE_POPPLER_CAIRO
 527     // Get page size by accounting for rotation
 528     double width, height;
 529     int rotate = _previewed_page->getRotate();
 530     if ( rotate == 90 || rotate == 270 ) {
 531         height = _previewed_page->getCropWidth();
 532         width = _previewed_page->getCropHeight();
 533     } else {
 534         width = _previewed_page->getCropWidth();
 535         height = _previewed_page->getCropHeight();
 536     }
 537     // Calculate the needed scaling for the page
 538     double scale_x = (double)_preview_width / width;
 539     double scale_y = (double)_preview_height / height;
 540     double scale_factor = ( scale_x > scale_y ) ? scale_y : scale_x;
 541     // Create new Cairo surface
 542     _thumb_width = (int)ceil( width * scale_factor );
 543     _thumb_height = (int)ceil( height * scale_factor );
 544     _thumb_rowstride = _thumb_width * 4;
 545     if (_thumb_data) {
 546         delete _thumb_data;
 547     }
 548     _thumb_data = new unsigned char[ _thumb_rowstride * _thumb_height ];
 549     if (_cairo_surface) {
 550         cairo_surface_destroy(_cairo_surface);
 551     }
 552     _cairo_surface = cairo_image_surface_create_for_data(_thumb_data,
 553             CAIRO_FORMAT_ARGB32, _thumb_width, _thumb_height, _thumb_rowstride);
 554     cairo_t *cr = cairo_create(_cairo_surface);
 555     cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);  // Set fill color to white
 556     cairo_paint(cr);    // Clear it
 557     cairo_scale(cr, scale_factor, scale_factor);    // Use Cairo for resizing the image
 558     // Render page
 559     if (_poppler_doc != NULL) {
 560         PopplerPage *poppler_page = poppler_document_get_page(_poppler_doc, page-1);
 561         poppler_page_render(poppler_page, cr);
 562         g_object_unref(G_OBJECT(poppler_page));
 563     }
 564     // Clean up
 565     cairo_destroy(cr);
 566     // Redraw preview area
 567     _previewArea->set_size_request(_preview_width, _preview_height);
 568     _previewArea->queue_draw();
 569 #endif
 570 }
 571
 572 ////////////////////////////////////////////////////////////////////////////////
 573
 574 /**
 575  * Parses the selected page of the given PDF document using PdfParser.
 576  */
 577 SPDocument *
 578 PdfInput::open(::Inkscape::Extension::Input * /*mod*/, const gchar * uri) {
 579
 580     // Initialize the globalParams variable for poppler
 581     if (!globalParams) {
 582         globalParams = new GlobalParams();
 583     }
 584     // poppler does not use glib g_open. So on win32 we must use unicode call. code was copied from glib gstdio.c
 585 #ifndef WIN32
 586     GooString *filename_goo = new GooString(uri);
 587     PDFDoc *pdf_doc = new PDFDoc(filename_goo, NULL, NULL, NULL);   // TODO: Could ask for password
 588     //delete filename_goo;
 589 #else
 590     wchar_t *wfilename = (wchar_t*)g_utf8_to_utf16 (uri, -1, NULL, NULL, NULL);
 591
 592     if (wfilename == NULL) {
 593       return NULL;
 594     }
 595
 596     PDFDoc *pdf_doc = new PDFDoc(wfilename, wcslen(wfilename), NULL, NULL, NULL);   // TODO: Could ask for password
 597     g_free (wfilename);
 598 #endif
 599
 600     if (!pdf_doc->isOk()) {
 601         int error = pdf_doc->getErrorCode();
 602         delete pdf_doc;
 603         if (error == errEncrypted) {
 604             g_message("Document is encrypted.");
 605         } else if (error == errOpenFile) {
 606             g_message("couldn't open the PDF file.");
 607         } else if (error == errBadCatalog) {
 608             g_message("couldn't read the page catalog.");
 609         } else if (error == errDamaged) {
 610             g_message("PDF file was damaged and couldn't be repaired.");
 611         } else if (error == errHighlightFile) {
 612             g_message("nonexistent or invalid highlight file.");
 613         } else if (error == errBadPrinter) {
 614             g_message("invalid printer.");
 615         } else if (error == errPrinting) {
 616             g_message("Error during printing.");
 617         } else if (error == errPermission) {
 618             g_message("PDF file does not allow that operation.");
 619         } else if (error == errBadPageNum) {
 620             g_message("invalid page number.");
 621         } else if (error == errFileIO) {
 622             g_message("file IO error.");
 623         } else {
 624             g_message("Failed to load document from data (error %d)", error);
 625         }
 626
 627         return NULL;
 628     }
 629     PdfImportDialog *dlg = new PdfImportDialog(pdf_doc, uri);
 630     if (!dlg->showDialog()) {
 631         delete dlg;
 632         delete pdf_doc;
 633
 634         return NULL;
 635     }
 636
 637     // Get needed page
 638     int page_num = dlg->getSelectedPage();
 639     Catalog *catalog = pdf_doc->getCatalog();
 640     Page *page = catalog->getPage(page_num);
 641
 642     SPDocument *doc = sp_document_new(NULL, TRUE, TRUE);
 643     bool saved = sp_document_get_undo_sensitive(doc);
 644     sp_document_set_undo_sensitive(doc, false); // No need to undo in this temporary document
 645
 646     // Create builder
 647     gchar *docname = g_path_get_basename(uri);
 648     gchar *dot = g_strrstr(docname, ".");
 649     if (dot) {
 650         *dot = 0;
 651     }
 652     SvgBuilder *builder = new SvgBuilder(doc, docname, pdf_doc->getXRef());
 653
 654     // Get preferences
 655     Inkscape::XML::Node *prefs = builder->getPreferences();
 656     dlg->getImportSettings(prefs);
 657
 658     // Apply crop settings
 659     PDFRectangle *clipToBox = NULL;
 660     double crop_setting;
 661     sp_repr_get_double(prefs, "cropTo", &crop_setting);
 662     if ( crop_setting >= 0.0 ) {    // Do page clipping
 663         int crop_choice = (int)crop_setting;
 664         switch (crop_choice) {
 665             case 0: // Media box
 666                 clipToBox = page->getMediaBox();
 667                 break;
 668             case 1: // Crop box
 669                 clipToBox = page->getCropBox();
 670                 break;
 671             case 2: // Bleed box
 672                 clipToBox = page->getBleedBox();
 673                 break;
 674             case 3: // Trim box
 675                 clipToBox = page->getTrimBox();
 676                 break;
 677             case 4: // Art box
 678                 clipToBox = page->getArtBox();
 679                 break;
 680             default:
 681                 break;
 682         }
 683     }
 684
 685     // Create parser
 686     PdfParser *pdf_parser = new PdfParser(pdf_doc->getXRef(), builder, page_num-1, page->getRotate(),
 687                                           page->getResourceDict(), page->getCropBox(), clipToBox);
 688
 689     // Set up approximation precision for parser
 690     double color_delta;
 691     sp_repr_get_double(prefs, "approximationPrecision", &color_delta);
 692     if ( color_delta <= 0.0 ) {
 693         color_delta = 1.0 / 2.0;
 694     } else {
 695         color_delta = 1.0 / color_delta;
 696     }
 697     for ( int i = 1 ; i <= pdfNumShadingTypes ; i++ ) {
 698         pdf_parser->setApproximationPrecision(i, color_delta, 6);
 699     }
 700
 701     // Parse the document structure
 702     Object obj;
 703     page->getContents(&obj);
 704     if (!obj.isNull()) {
 705         pdf_parser->parse(&obj);
 706     }
 707
 708     // Cleanup
 709     obj.free();
 710     delete pdf_parser;
 711     delete builder;
 712     g_free(docname);
 713     delete pdf_doc;
 714
 715     // Restore undo
 716     sp_document_set_undo_sensitive(doc, saved);
 717
 718     return doc;
 719 }
 720
 721 #include "../clear-n_.h"
 722
 723 void
 724 PdfInput::init(void) {
 725     Inkscape::Extension::Extension * ext;
 726
 727     /* PDF in */
 728     ext = Inkscape::Extension::build_from_mem(
 729         "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
 730             "<name>" N_("PDF Input") "</name>\n"
 731             "<id>org.inkscape.input.pdf</id>\n"
 732             "<input>\n"
 733                 "<extension>.pdf</extension>\n"
 734                 "<mimetype>application/pdf</mimetype>\n"
 735                 "<filetypename>" N_("Adobe PDF (*.pdf)") "</filetypename>\n"
 736                 "<filetypetooltip>" N_("Adobe Portable Document Format") "</filetypetooltip>\n"
 737             "</input>\n"
 738         "</inkscape-extension>", new PdfInput());
 739
 740     /* AI in */
 741     ext = Inkscape::Extension::build_from_mem(
 742         "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
 743             "<name>" N_("AI Input") "</name>\n"
 744             "<id>org.inkscape.input.ai</id>\n"
 745             "<input>\n"
 746                 "<extension>.ai</extension>\n"
 747                 "<mimetype>image/x-adobe-illustrator</mimetype>\n"
 748                 "<filetypename>" N_("Adobe Illustrator 9.0 and above (*.ai)") "</filetypename>\n"
 749                 "<filetypetooltip>" N_("Open files saved in Adobe Illustrator 9.0 and newer versions") "</filetypetooltip>\n"
 750             "</input>\n"
 751         "</inkscape-extension>", new PdfInput());
 752 } // init
 753
 754 } } }  /* namespace Inkscape, Extension, Implementation */
 755
 756 #endif /* HAVE_POPPLER */
 757
 758 /*
 759   Local Variables:
 760   mode:c++
 761   c-file-style:"stroustrup"
 762   c-file-offsets:((innamespace . 0)(inline-open . 0))
 763   indent-tabs-mode:nil
 764   fill-column:99
 765   End:
 766 */
 767 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :