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     _labelTotalPages = Gtk::manage(new class Gtk::Label());
  67     hbox2 = Gtk::manage(new class Gtk::HBox(false, 0));
  68     // Disable the page selector when there's only one page
  69     int num_pages = _pdf_doc->getCatalog()->getNumPages();
  70     if ( num_pages == 1 ) {
  71         _pageNumberSpin->set_sensitive(false);
  72     } else {
  73         // Display total number of pages
  74         gchar *label_text = g_strdup_printf("/ %i", num_pages);
  75         _labelTotalPages->set_label(label_text);
  76         g_free(label_text);
  77     }
  78
  79     // Crop settings
  80     _cropCheck = Gtk::manage(new class Gtk::CheckButton(_("Crop to:")));
  81     _cropTypeCombo = Gtk::manage(new class Gtk::ComboBoxText());
  82     int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
  83     for ( int i = 0 ; i < num_crop_choices ; i++ ) {
  84         _cropTypeCombo->append_text(crop_setting_choices[i]);
  85     }
  86     _cropTypeCombo->set_active_text(crop_setting_choices[0]);
  87     _cropTypeCombo->set_sensitive(false);
  88
  89     hbox3 = Gtk::manage(new class Gtk::HBox(false, 0));
  90     vbox2 = Gtk::manage(new class Gtk::VBox(false, 0));
  91     alignment3 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
  92     _labelPageSettings = Gtk::manage(new class Gtk::Label(_("Page Settings")));
  93     _pageSettingsFrame = Gtk::manage(new class Gtk::Frame());
  94     _labelPrecision = Gtk::manage(new class Gtk::Label(_("Precision of approximation for gradient meshes:")));
  95
  96     _fallbackPrecisionSlider_adj = Gtk::manage(new class Gtk::Adjustment(2, 1, 256, 1, 10, 10));
  97     _fallbackPrecisionSlider = Gtk::manage(new class Gtk::HScale(*_fallbackPrecisionSlider_adj));
  98     _fallbackPrecisionSlider->set_value(2.0);
  99     _labelPrecisionComment = Gtk::manage(new class Gtk::Label(_("rough")));
 100     hbox6 = Gtk::manage(new class Gtk::HBox(false, 0));
 101
 102     // Text options
 103     _labelText = Gtk::manage(new class Gtk::Label(_("Text handling:")));
 104     _textHandlingCombo = Gtk::manage(new class Gtk::ComboBoxText());
 105     _textHandlingCombo->append_text(_("import text as text"));
 106     _textHandlingCombo->set_active_text(_("import text as text"));
 107
 108     hbox5 = Gtk::manage(new class Gtk::HBox(false, 0));
 109     _embedImagesCheck = Gtk::manage(new class Gtk::CheckButton(_("Embed images")));
 110     vbox3 = Gtk::manage(new class Gtk::VBox(false, 0));
 111     alignment4 = Gtk::manage(new class Gtk::Alignment(0.5, 0.5, 1, 1));
 112     _labelImportSettings = Gtk::manage(new class Gtk::Label(_("Import Settings")));
 113     _importSettingsFrame = Gtk::manage(new class Gtk::Frame());
 114     vbox1 = Gtk::manage(new class Gtk::VBox(false, 0));
 115     _previewArea = Gtk::manage(new class Gtk::DrawingArea());
 116     hbox1 = Gtk::manage(new class Gtk::HBox(false, 0));
 117     cancelbutton->set_flags(Gtk::CAN_FOCUS);
 118     cancelbutton->set_flags(Gtk::CAN_DEFAULT);
 119     cancelbutton->set_relief(Gtk::RELIEF_NORMAL);
 120     okbutton->set_flags(Gtk::CAN_FOCUS);
 121     okbutton->set_flags(Gtk::CAN_DEFAULT);
 122     okbutton->set_relief(Gtk::RELIEF_NORMAL);
 123     this->get_action_area()->property_layout_style().set_value(Gtk::BUTTONBOX_END);
 124     _labelSelect->set_alignment(0.5,0.5);
 125     _labelSelect->set_padding(0,0);
 126     _labelSelect->set_justify(Gtk::JUSTIFY_LEFT);
 127     _labelSelect->set_line_wrap(false);
 128     _labelSelect->set_use_markup(false);
 129     _labelSelect->set_selectable(false);
 130     _pageNumberSpin->set_flags(Gtk::CAN_FOCUS);
 131     _pageNumberSpin->set_update_policy(Gtk::UPDATE_ALWAYS);
 132     _pageNumberSpin->set_numeric(true);
 133     _pageNumberSpin->set_digits(0);
 134     _pageNumberSpin->set_wrap(false);
 135     _labelTotalPages->set_alignment(0.5,0.5);
 136     _labelTotalPages->set_padding(0,0);
 137     _labelTotalPages->set_justify(Gtk::JUSTIFY_LEFT);
 138     _labelTotalPages->set_line_wrap(false);
 139     _labelTotalPages->set_use_markup(false);
 140     _labelTotalPages->set_selectable(false);
 141     hbox2->pack_start(*_labelSelect, Gtk::PACK_SHRINK, 0);
 142     hbox2->pack_start(*_pageNumberSpin, Gtk::PACK_SHRINK, 4);
 143     hbox2->pack_start(*_labelTotalPages, Gtk::PACK_SHRINK, 0);
 144     _cropCheck->set_flags(Gtk::CAN_FOCUS);
 145     _cropCheck->set_relief(Gtk::RELIEF_NORMAL);
 146     _cropCheck->set_mode(true);
 147     _cropCheck->set_active(false);
 148     _cropTypeCombo->set_border_width(1);
 149     hbox3->pack_start(*_cropCheck, Gtk::PACK_SHRINK, 0);
 150     hbox3->pack_start(*_cropTypeCombo, Gtk::PACK_SHRINK, 4);
 151     vbox2->pack_start(*hbox2);
 152     vbox2->pack_start(*hbox3);
 153     alignment3->add(*vbox2);
 154     _labelPageSettings->set_alignment(0.5,0.5);
 155     _labelPageSettings->set_padding(0,0);
 156     _labelPageSettings->set_justify(Gtk::JUSTIFY_LEFT);
 157     _labelPageSettings->set_line_wrap(false);
 158     _labelPageSettings->set_use_markup(true);
 159     _labelPageSettings->set_selectable(false);
 160     _pageSettingsFrame->set_border_width(4);
 161     _pageSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 162     _pageSettingsFrame->set_label_align(0,0.5);
 163     _pageSettingsFrame->add(*alignment3);
 164     _pageSettingsFrame->set_label_widget(*_labelPageSettings);
 165     _labelPrecision->set_alignment(0.5,0.5);
 166     _labelPrecision->set_padding(0,0);
 167     _labelPrecision->set_justify(Gtk::JUSTIFY_LEFT);
 168     _labelPrecision->set_line_wrap(false);
 169     _labelPrecision->set_use_markup(false);
 170     _labelPrecision->set_selectable(false);
 171     _fallbackPrecisionSlider->set_size_request(180,-1);
 172     _fallbackPrecisionSlider->set_flags(Gtk::CAN_FOCUS);
 173     _fallbackPrecisionSlider->set_update_policy(Gtk::UPDATE_CONTINUOUS);
 174     _fallbackPrecisionSlider->set_inverted(false);
 175     _fallbackPrecisionSlider->set_digits(1);
 176     _fallbackPrecisionSlider->set_draw_value(true);
 177     _fallbackPrecisionSlider->set_value_pos(Gtk::POS_TOP);
 178     _labelPrecisionComment->set_size_request(90,-1);
 179     _labelPrecisionComment->set_alignment(0.5,0.5);
 180     _labelPrecisionComment->set_padding(0,0);
 181     _labelPrecisionComment->set_justify(Gtk::JUSTIFY_LEFT);
 182     _labelPrecisionComment->set_line_wrap(false);
 183     _labelPrecisionComment->set_use_markup(false);
 184     _labelPrecisionComment->set_selectable(false);
 185     hbox6->pack_start(*_fallbackPrecisionSlider, Gtk::PACK_SHRINK, 4);
 186     hbox6->pack_start(*_labelPrecisionComment, Gtk::PACK_SHRINK, 4);
 187     _labelText->set_alignment(0.5,0.5);
 188     _labelText->set_padding(0,0);
 189     _labelText->set_justify(Gtk::JUSTIFY_LEFT);
 190     _labelText->set_line_wrap(false);
 191     _labelText->set_use_markup(false);
 192     _labelText->set_selectable(false);
 193     hbox5->pack_start(*_labelText, Gtk::PACK_SHRINK, 0);
 194     hbox5->pack_start(*_textHandlingCombo, Gtk::PACK_SHRINK, 0);
 195     _embedImagesCheck->set_flags(Gtk::CAN_FOCUS);
 196     _embedImagesCheck->set_relief(Gtk::RELIEF_NORMAL);
 197     _embedImagesCheck->set_mode(true);
 198     _embedImagesCheck->set_active(true);
 199     vbox3->pack_start(*_labelPrecision, Gtk::PACK_SHRINK, 4);
 200     vbox3->pack_start(*hbox6, Gtk::PACK_SHRINK, 0);
 201     vbox3->pack_start(*hbox5);
 202     vbox3->pack_start(*_embedImagesCheck, Gtk::PACK_SHRINK, 0);
 203     alignment4->add(*vbox3);
 204     _labelImportSettings->set_alignment(0.5,0.5);
 205     _labelImportSettings->set_padding(0,0);
 206     _labelImportSettings->set_justify(Gtk::JUSTIFY_LEFT);
 207     _labelImportSettings->set_line_wrap(false);
 208     _labelImportSettings->set_use_markup(true);
 209     _labelImportSettings->set_selectable(false);
 210     _importSettingsFrame->set_border_width(4);
 211     _importSettingsFrame->set_shadow_type(Gtk::SHADOW_ETCHED_IN);
 212     _importSettingsFrame->set_label_align(0,0.5);
 213     _importSettingsFrame->add(*alignment4);
 214     _importSettingsFrame->set_label_widget(*_labelImportSettings);
 215     vbox1->pack_start(*_pageSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 216     vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_EXPAND_PADDING, 0);
 217     hbox1->pack_start(*vbox1);
 218     hbox1->pack_start(*_previewArea, Gtk::PACK_EXPAND_WIDGET, 4);
 219     this->get_vbox()->set_homogeneous(false);
 220     this->get_vbox()->set_spacing(0);
 221     this->get_vbox()->pack_start(*hbox1);
 222     this->set_title(_("PDF Import Settings"));
 223     this->set_modal(true);
 224     this->property_window_position().set_value(Gtk::WIN_POS_NONE);
 225     this->set_resizable(true);
 226     this->property_destroy_with_parent().set_value(false);
 227     this->set_has_separator(true);
 228     this->add_action_widget(*cancelbutton, -6);
 229     this->add_action_widget(*okbutton, -5);
 230     cancelbutton->show();
 231     okbutton->show();
 232     _labelSelect->show();
 233     _pageNumberSpin->show();
 234     _labelTotalPages->show();
 235     hbox2->show();
 236     _cropCheck->show();
 237     _cropTypeCombo->show();
 238     hbox3->show();
 239     vbox2->show();
 240     alignment3->show();
 241     _labelPageSettings->show();
 242     _pageSettingsFrame->show();
 243     _labelPrecision->show();
 244     _fallbackPrecisionSlider->show();
 245     _labelPrecisionComment->show();
 246     hbox6->show();
 247     _labelText->show();
 248     _textHandlingCombo->show();
 249     hbox5->show();
 250     _embedImagesCheck->show();
 251     vbox3->show();
 252     alignment4->show();
 253     _labelImportSettings->show();
 254     _importSettingsFrame->show();
 255     vbox1->show();
 256     _previewArea->show();
 257     hbox1->show();
 258
 259     // Connect signals
 260     _previewArea->signal_expose_event().connect(sigc::mem_fun(*this, &PdfImportDialog::_onExposePreview));
 261     _pageNumberSpin_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPageNumberChanged));
 262     _cropCheck->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleCropping));
 263     _fallbackPrecisionSlider_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPrecisionChanged));
 264
 265     _render_thumb = false;
 266 #ifdef HAVE_POPPLER_CAIRO
 267     // Create an OutputDev
 268     _preview_output_dev = new CairoOutputDev();
 269     _preview_output_dev->startDoc(_pdf_doc->getXRef());
 270     _cairo_surface = NULL;
 271     _render_thumb = true;
 272 #endif
 273
 274     // Set default preview size
 275     _preview_width = 200;
 276     _preview_height = 300;
 277
 278     // Init preview
 279     _thumb_data = NULL;
 280     _pageNumberSpin_adj->set_value(1.0);
 281     _current_page = 1;
 282     _setPreviewPage(_current_page);
 283 }
 284
 285 PdfImportDialog::~PdfImportDialog() {
 286 #ifdef HAVE_POPPLER_CAIRO
 287     if (_preview_output_dev) {
 288         delete _preview_output_dev;
 289     }
 290     if (_cairo_surface) {
 291         cairo_surface_destroy(_cairo_surface);
 292     }
 293 #endif
 294     if (_thumb_data) {
 295         if (_render_thumb) {
 296             delete _thumb_data;
 297         } else {
 298             gfree(_thumb_data);
 299         }
 300     }
 301 }
 302
 303 bool PdfImportDialog::showDialog() {
 304     show();
 305     gint b = run();
 306     hide();
 307     if ( b == Gtk::RESPONSE_OK ) {
 308         return TRUE;
 309     } else {
 310         return FALSE;
 311     }
 312 }
 313
 314 int PdfImportDialog::getSelectedPage() {
 315     return _current_page;
 316 }
 317
 318 /**
 319  * \brief Retrieves the current settings into a repr which SvgBuilder will use
 320  *        for determining the behaviour desired by the user
 321  */
 322 void PdfImportDialog::getImportSettings(Inkscape::XML::Node *prefs) {
 323     sp_repr_set_svg_double(prefs, "selectedPage", (double)_current_page);
 324     if (_cropCheck->get_active()) {
 325         Glib::ustring current_choice = _cropTypeCombo->get_active_text();
 326         int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]);
 327         int i = 0;
 328         for ( ; i < num_crop_choices ; i++ ) {
 329             if ( current_choice == crop_setting_choices[i] ) {
 330                 break;
 331             }
 332         }
 333         sp_repr_set_svg_double(prefs, "cropTo", (double)i);
 334     } else {
 335         sp_repr_set_svg_double(prefs, "cropTo", -1.0);
 336     }
 337     sp_repr_set_svg_double(prefs, "approximationPrecision",
 338                            _fallbackPrecisionSlider->get_value());
 339     if (_embedImagesCheck->get_active()) {
 340         prefs->setAttribute("embedImages", "1");
 341     } else {
 342         prefs->setAttribute("embedImages", "0");
 343     }
 344 }
 345
 346 /**
 347  * \brief Redisplay the comment on the current approximation precision setting
 348  * Evenly divides the interval of possible values between the available labels.
 349  */
 350 void PdfImportDialog::_onPrecisionChanged() {
 351
 352     static Glib::ustring precision_comments[] = {
 353         Glib::ustring(_("rough")),
 354         Glib::ustring(_("medium")),
 355         Glib::ustring(_("fine")),
 356         Glib::ustring(_("very fine"))
 357     };
 358
 359     double min = _fallbackPrecisionSlider_adj->get_lower();
 360     double max = _fallbackPrecisionSlider_adj->get_upper();
 361     int num_intervals = sizeof(precision_comments) / sizeof(precision_comments[0]);
 362     double interval_len = ( max - min ) / (double)num_intervals;
 363     double value = _fallbackPrecisionSlider_adj->get_value();
 364     int comment_idx = (int)floor( ( value - min ) / interval_len );
 365     _labelPrecisionComment->set_label(precision_comments[comment_idx]);
 366 }
 367
 368 void PdfImportDialog::_onToggleCropping() {
 369     _cropTypeCombo->set_sensitive(_cropCheck->get_active());
 370 }
 371
 372 void PdfImportDialog::_onPageNumberChanged() {
 373     int page = _pageNumberSpin->get_value_as_int();
 374     _current_page = CLAMP(page, 1, _pdf_doc->getCatalog()->getNumPages());
 375     _setPreviewPage(_current_page);
 376 }
 377
 378 #ifdef HAVE_POPPLER_CAIRO
 379 /**
 380  * \brief Copies image data from a Cairo surface to a pixbuf
 381  *
 382  * Borrowed from libpoppler, from the file poppler-page.cc
 383  * Copyright (C) 2005, Red Hat, Inc.
 384  *
 385  */
 386 static void copy_cairo_surface_to_pixbuf (cairo_surface_t *surface,
 387                                           unsigned char   *data,
 388                                           GdkPixbuf       *pixbuf)
 389 {
 390     int cairo_width, cairo_height, cairo_rowstride;
 391     unsigned char *pixbuf_data, *dst, *cairo_data;
 392     int pixbuf_rowstride, pixbuf_n_channels;
 393     unsigned int *src;
 394     int x, y;
 395
 396     cairo_width = cairo_image_surface_get_width (surface);
 397     cairo_height = cairo_image_surface_get_height (surface);
 398     cairo_rowstride = cairo_width * 4;
 399     cairo_data = data;
 400
 401     pixbuf_data = gdk_pixbuf_get_pixels (pixbuf);
 402     pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 403     pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
 404
 405     if (cairo_width > gdk_pixbuf_get_width (pixbuf))
 406         cairo_width = gdk_pixbuf_get_width (pixbuf);
 407     if (cairo_height > gdk_pixbuf_get_height (pixbuf))
 408         cairo_height = gdk_pixbuf_get_height (pixbuf);
 409     for (y = 0; y < cairo_height; y++)
 410     {
 411         src = (unsigned int *) (cairo_data + y * cairo_rowstride);
 412         dst = pixbuf_data + y * pixbuf_rowstride;
 413         for (x = 0; x < cairo_width; x++)
 414         {
 415             dst[0] = (*src >> 16) & 0xff;
 416             dst[1] = (*src >> 8) & 0xff;
 417             dst[2] = (*src >> 0) & 0xff;
 418             if (pixbuf_n_channels == 4)
 419                 dst[3] = (*src >> 24) & 0xff;
 420             dst += pixbuf_n_channels;
 421             src++;
 422         }
 423     }
 424 }
 425 #endif
 426
 427 /**
 428  * \brief Updates the preview area with the previously rendered thumbnail
 429  */
 430 bool PdfImportDialog::_onExposePreview(GdkEventExpose *event) {
 431
 432     // Check if we have a thumbnail at all
 433     if (!_thumb_data) {
 434         return true;
 435     }
 436
 437     // Create the pixbuf for the thumbnail
 438     Glib::RefPtr<Gdk::Pixbuf> thumb;
 439     if (_render_thumb) {
 440         thumb = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true,
 441                                     8, _thumb_width, _thumb_height);
 442     } else {
 443         thumb = Gdk::Pixbuf::create_from_data(_thumb_data, Gdk::COLORSPACE_RGB,
 444             false, 8, _thumb_width, _thumb_height, _thumb_rowstride);
 445     }
 446     if (!thumb) {
 447         return true;
 448     }
 449
 450     // Set background to white
 451     if (_render_thumb) {
 452         thumb->fill(0xffffffff);
 453         Glib::RefPtr<Gdk::Pixmap> back_pixmap = Gdk::Pixmap::create(
 454                 _previewArea->get_window(), _thumb_width, _thumb_height, -1);
 455         if (!back_pixmap) {
 456             return true;
 457         }
 458         back_pixmap->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb, 0, 0, 0, 0,
 459                                  _thumb_width, _thumb_height,
 460                                  Gdk::RGB_DITHER_NONE, 0, 0);
 461         _previewArea->get_window()->set_back_pixmap(back_pixmap, false);
 462         _previewArea->get_window()->clear();
 463     }
 464 #ifdef HAVE_POPPLER_CAIRO
 465     // Copy the thumbnail image from the Cairo surface
 466     if (_render_thumb) {
 467         copy_cairo_surface_to_pixbuf(_cairo_surface, _thumb_data, thumb->gobj());
 468     }
 469 #endif
 470     _previewArea->get_window()->draw_pixbuf(Glib::RefPtr<Gdk::GC>(), thumb,
 471                                             0, 0, 0, _render_thumb ? 0 : 20,
 472                                             -1, -1, Gdk::RGB_DITHER_NONE, 0, 0);
 473
 474     return true;
 475 }
 476
 477 /**
 478  * \brief Renders the given page's thumbnail using Cairo
 479  */
 480 void PdfImportDialog::_setPreviewPage(int page) {
 481
 482     _previewed_page = _pdf_doc->getCatalog()->getPage(page);
 483     // Try to get a thumbnail from the PDF if possible
 484     if (!_render_thumb) {
 485         if (_thumb_data) {
 486             gfree(_thumb_data);
 487             _thumb_data = NULL;
 488         }
 489         if (!_previewed_page->loadThumb(&_thumb_data,
 490              &_thumb_width, &_thumb_height, &_thumb_rowstride)) {
 491             return;
 492         }
 493         // Redraw preview area
 494         _previewArea->set_size_request(_thumb_width, _thumb_height + 20);
 495         _previewArea->queue_draw();
 496         return;
 497     }
 498 #ifdef HAVE_POPPLER_CAIRO
 499     // Get page size by accounting for rotation
 500     double width, height;
 501     int rotate = _previewed_page->getRotate();
 502     if ( rotate == 90 || rotate == 270 ) {
 503         height = _previewed_page->getCropWidth();
 504         width = _previewed_page->getCropHeight();
 505     } else {
 506         width = _previewed_page->getCropWidth();
 507         height = _previewed_page->getCropHeight();
 508     }
 509     // Calculate the needed scaling for the page
 510     double scale_x = (double)_preview_width / width;
 511     double scale_y = (double)_preview_height / height;
 512     double scale_factor = ( scale_x > scale_y ) ? scale_y : scale_x;
 513     // Create new Cairo surface
 514     _thumb_width = (int)ceil( width * scale_factor );
 515     _thumb_height = (int)ceil( height * scale_factor );
 516     _thumb_rowstride = _thumb_width * 4;
 517     if (_thumb_data) {
 518         delete _thumb_data;
 519     }
 520     _thumb_data = new unsigned char[ _thumb_rowstride * _thumb_height ];
 521     if (_cairo_surface) {
 522         cairo_surface_destroy(_cairo_surface);
 523     }
 524     _cairo_surface = cairo_image_surface_create_for_data(_thumb_data,
 525             CAIRO_FORMAT_ARGB32, _thumb_width, _thumb_height, _thumb_rowstride);
 526     cairo_t *cr = cairo_create(_cairo_surface);
 527     cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);  // Set fill color to white
 528     cairo_paint(cr);    // Clear it
 529     cairo_scale(cr, scale_factor, scale_factor);    // Use Cairo for resizing the image
 530     _preview_output_dev->setCairo(cr);
 531     // Render page
 532     _previewed_page->displaySlice(_preview_output_dev,
 533                        72.0, 72.0, 0,
 534                        FALSE, /* useMediaBox */
 535                        TRUE, /* crop */
 536                        0, 0,
 537                        (int)ceil(_previewed_page->getCropWidth()),
 538                        (int)ceil(_previewed_page->getCropHeight()),
 539                        FALSE, /* printing */
 540                        _pdf_doc->getCatalog());
 541     // Clean up
 542     _preview_output_dev->setCairo(NULL);
 543     cairo_destroy(cr);
 544     // Redraw preview area
 545     _previewArea->set_size_request(_preview_width, _preview_height);
 546     _previewArea->queue_draw();
 547 #endif
 548 }
 549
 550 ////////////////////////////////////////////////////////////////////////////////
 551
 552 /**
 553  * Parses the selected page of the given PDF document using PdfParser.
 554  */
 555 SPDocument *
 556 PdfInput::open(::Inkscape::Extension::Input * mod, const gchar * uri) {
 557
 558     // Initialize the globalParams variable for poppler
 559     if (!globalParams) {
 560         globalParams = new GlobalParams();
 561     }
 562     GooString *filename_goo = new GooString(uri);
 563     PDFDoc *pdf_doc = new PDFDoc(filename_goo, NULL, NULL, NULL);   // TODO: Could ask for password
 564     if (!pdf_doc->isOk()) {
 565         int error = pdf_doc->getErrorCode();
 566         delete pdf_doc;
 567         if (error == errEncrypted) {
 568             g_message("Document is encrypted.");
 569         } else {
 570             g_message("Failed to load document from data (error %d)", error);
 571         }
 572
 573         return NULL;
 574     }
 575     PdfImportDialog *dlg = new PdfImportDialog(pdf_doc);
 576     if (!dlg->showDialog()) {
 577         delete dlg;
 578         delete pdf_doc;
 579
 580         return NULL;
 581     }
 582
 583     // Get needed page
 584     int page_num = dlg->getSelectedPage();
 585     Catalog *catalog = pdf_doc->getCatalog();
 586     Page *page = catalog->getPage(page_num);
 587
 588     SPDocument *doc = sp_document_new(NULL, TRUE, TRUE);
 589     bool saved = sp_document_get_undo_sensitive(doc);
 590     sp_document_set_undo_sensitive(doc, false); // No need to undo in this temporary document
 591
 592     // Create builder
 593     gchar *docname = g_path_get_basename(uri);
 594     gchar *dot = g_strrstr(docname, ".");
 595     if (dot) {
 596         *dot = 0;
 597     }
 598     SvgBuilder *builder = new SvgBuilder(doc, docname, pdf_doc->getXRef());
 599
 600     // Get preferences
 601     Inkscape::XML::Node *prefs = builder->getPreferences();
 602     dlg->getImportSettings(prefs);
 603
 604     // Apply crop settings
 605     PDFRectangle *clipToBox = NULL;
 606     double crop_setting;
 607     sp_repr_get_double(prefs, "cropTo", &crop_setting);
 608     if ( crop_setting >= 0.0 ) {    // Do page clipping
 609         int crop_choice = (int)crop_setting;
 610         switch (crop_choice) {
 611             case 0: // Media box
 612                 clipToBox = page->getMediaBox();
 613                 break;
 614             case 1: // Crop box
 615                 clipToBox = page->getCropBox();
 616                 break;
 617             case 2: // Bleed box
 618                 clipToBox = page->getBleedBox();
 619                 break;
 620             case 3: // Trim box
 621                 clipToBox = page->getTrimBox();
 622                 break;
 623             case 4: // Art box
 624                 clipToBox = page->getArtBox();
 625                 break;
 626             default:
 627                 break;
 628         }
 629     }
 630
 631     // Create parser
 632     PdfParser *pdf_parser = new PdfParser(pdf_doc->getXRef(), builder, page_num-1, page->getRotate(),
 633                                           page->getResourceDict(), page->getCropBox(), clipToBox);
 634
 635     // Set up approximation precision for parser
 636     double color_delta;
 637     sp_repr_get_double(prefs, "approximationPrecision", &color_delta);
 638     if ( color_delta <= 0.0 ) {
 639         color_delta = 1.0 / 2.0;
 640     } else {
 641         color_delta = 1.0 / color_delta;
 642     }
 643     for ( int i = 1 ; i <= pdfNumShadingTypes ; i++ ) {
 644         pdf_parser->setApproximationPrecision(i, color_delta, 6);
 645     }
 646
 647     // Parse the document structure
 648     Object obj;
 649     page->getContents(&obj);
 650     if (!obj.isNull()) {
 651         pdf_parser->parse(&obj);
 652     }
 653
 654     // Cleanup
 655     obj.free();
 656     delete pdf_parser;
 657     delete builder;
 658     g_free(docname);
 659     delete pdf_doc;
 660
 661     // Restore undo
 662     sp_document_set_undo_sensitive(doc, saved);
 663
 664     return doc;
 665 }
 666
 667 #include "../clear-n_.h"
 668
 669 void
 670 PdfInput::init(void) {
 671     Inkscape::Extension::Extension * ext;
 672
 673     /* PDF in */
 674     ext = Inkscape::Extension::build_from_mem(
 675         "<inkscape-extension>\n"
 676             "<name>PDF Input</name>\n"
 677             "<id>org.inkscape.input.pdf</id>\n"
 678             "<input>\n"
 679                 "<extension>.pdf</extension>\n"
 680                 "<mimetype>application/pdf</mimetype>\n"
 681                 "<filetypename>Adobe PDF (*.pdf) [via poppler]</filetypename>\n"
 682                 "<filetypetooltip>Adobe Portable Document Format</filetypetooltip>\n"
 683             "</input>\n"
 684         "</inkscape-extension>", new PdfInput());
 685
 686     /* AI in */
 687     ext = Inkscape::Extension::build_from_mem(
 688         "<inkscape-extension>\n"
 689             "<name>AI Input</name>\n"
 690             "<id>org.inkscape.input.ai</id>\n"
 691             "<input>\n"
 692                 "<extension>.ai</extension>\n"
 693                 "<mimetype>image/x-adobe-illustrator</mimetype>\n"
 694                 "<filetypename>Adobe Illustrator (*.ai) [PDF-based]</filetypename>\n"
 695                 "<filetypetooltip>Open files saved with recent versions of Adobe Illustrator</filetypetooltip>\n"
 696             "</input>\n"
 697         "</inkscape-extension>", new PdfInput());
 698 } // init
 699
 700 } } }  /* namespace Inkscape, Extension, Implementation */
 701
 702 #endif /* HAVE_POPPLER */
 703
 704 /*
 705   Local Variables:
 706   mode:c++
 707   c-file-style:"stroustrup"
 708   c-file-offsets:((innamespace . 0)(inline-open . 0))
 709   indent-tabs-mode:nil
 710   fill-column:99
 711   End:
 712 */
 713 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :