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