backend/xps/xps-document.c

   1 /* this file is part of evince, a gnome document viewer
   2  *
   3  * Copyright (C) 2010 Carlos Garcia Campos <carlosgc@gnome.org>
   4  *
   5  * Evince is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * Evince is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include <config.h>
  21
  22 #include <glib/gi18n-lib.h>
  23 #include <libgxps/gxps.h>
  24
  25 #include "xps-document.h"
  26 #include "ev-document-links.h"
  27 #include "ev-document-print.h"
  28 #include "ev-document-misc.h"
  29
  30 struct _XPSDocument {
  31         EvDocument    object;
  32
  33         GFile        *file;
  34         GXPSFile     *xps;
  35         GXPSDocument *doc;
  36 };
  37
  38 struct _XPSDocumentClass {
  39         EvDocumentClass parent_class;
  40 };
  41
  42 static void xps_document_document_links_iface_init (EvDocumentLinksInterface *iface);
  43 static void xps_document_document_print_iface_init (EvDocumentPrintInterface *iface);
  44
  45 EV_BACKEND_REGISTER_WITH_CODE (XPSDocument, xps_document,
  46                {
  47                        EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS,
  48                                                        xps_document_document_links_iface_init);
  49                        EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_PRINT,
  50                                                        xps_document_document_print_iface_init);
  51                })
  52
  53 /* XPSDocument */
  54 static void
  55 xps_document_init (XPSDocument *ps_document)
  56 {
  57 }
  58
  59 static void
  60 xps_document_dispose (GObject *object)
  61 {
  62         XPSDocument *xps = XPS_DOCUMENT (object);
  63
  64         if (xps->file) {
  65                 g_object_unref (xps->file);
  66                 xps->file = NULL;
  67         }
  68
  69         if (xps->xps) {
  70                 g_object_unref (xps->xps);
  71                 xps->xps = NULL;
  72         }
  73
  74         if (xps->doc) {
  75                 g_object_unref (xps->doc);
  76                 xps->doc = NULL;
  77         }
  78
  79         G_OBJECT_CLASS (xps_document_parent_class)->dispose (object);
  80 }
  81
  82 /* EvDocumentIface */
  83 static gboolean
  84 xps_document_load (EvDocument *document,
  85                    const char *uri,
  86                    GError    **error)
  87 {
  88         XPSDocument *xps = XPS_DOCUMENT (document);
  89
  90         xps->file = g_file_new_for_uri (uri);
  91         xps->xps = gxps_file_new (xps->file, error);
  92
  93         if (!xps->xps)
  94                 return FALSE;
  95
  96         /* FIXME: what if there are multiple docs? */
  97         xps->doc = gxps_file_get_document (xps->xps, 0, error);
  98         if (!xps->doc) {
  99                 g_object_unref (xps->xps);
 100                 xps->xps = NULL;
 101
 102                 return FALSE;
 103         }
 104
 105         return TRUE;
 106 }
 107
 108 static gboolean
 109 xps_document_save (EvDocument *document,
 110                    const char *uri,
 111                    GError    **error)
 112 {
 113         XPSDocument *xps = XPS_DOCUMENT (document);
 114         GFile       *dest;
 115         gboolean     retval;
 116
 117         dest = g_file_new_for_uri (uri);
 118         retval = g_file_copy (xps->file, dest,
 119                               G_FILE_COPY_TARGET_DEFAULT_PERMS |
 120                               G_FILE_COPY_OVERWRITE,
 121                               NULL, NULL, NULL, error);
 122         g_object_unref (dest);
 123
 124         return retval;
 125 }
 126
 127 static gint
 128 xps_document_get_n_pages (EvDocument *document)
 129 {
 130         XPSDocument *xps = XPS_DOCUMENT (document);
 131
 132         return gxps_document_get_n_pages (xps->doc);
 133 }
 134
 135 static EvPage *
 136 xps_document_get_page (EvDocument *document,
 137                        gint        index)
 138 {
 139         XPSDocument *xps = XPS_DOCUMENT (document);
 140         GXPSPage    *xps_page;
 141         EvPage      *page;
 142
 143         xps_page = gxps_document_get_page (xps->doc, index, NULL);
 144         page = ev_page_new (index);
 145         if (xps_page) {
 146                 page->backend_page = (EvBackendPage)xps_page;
 147                 page->backend_destroy_func = (EvBackendPageDestroyFunc)g_object_unref;
 148         }
 149
 150         return page;
 151 }
 152
 153 static void
 154 xps_document_get_page_size (EvDocument *document,
 155                             EvPage     *page,
 156                             double     *width,
 157                             double     *height)
 158 {
 159         GXPSPage *xps_page;
 160         guint     w, h;
 161
 162         xps_page = GXPS_PAGE (page->backend_page);
 163
 164         gxps_page_get_size (xps_page, &w, &h);
 165
 166         if (width)
 167                 *width = (gdouble)w;
 168         if (height)
 169                 *height = (gdouble)h;
 170 }
 171
 172 static EvDocumentInfo *
 173 xps_document_get_info (EvDocument *document)
 174 {
 175         XPSDocument    *xps = XPS_DOCUMENT (document);
 176         EvDocumentInfo *info;
 177
 178         info = g_new0 (EvDocumentInfo, 1);
 179         info->fields_mask =
 180                 EV_DOCUMENT_INFO_N_PAGES |
 181                 EV_DOCUMENT_INFO_PAPER_SIZE;
 182
 183
 184         if (gxps_document_get_n_pages (xps->doc) > 0) {
 185                 ev_document_get_page_size (document, 0,
 186                                            &(info->paper_width),
 187                                            &(info->paper_height));
 188                 info->paper_width  = info->paper_width / 96.0f * 25.4f;
 189                 info->paper_height = info->paper_height / 96.0f * 25.4f;
 190         }
 191
 192         info->n_pages = gxps_document_get_n_pages (xps->doc);
 193
 194         return info;
 195 }
 196
 197 static gboolean
 198 xps_document_get_backend_info (EvDocument            *document,
 199                                EvDocumentBackendInfo *info)
 200 {
 201         info->name = "libgxps";
 202         /* FIXME */
 203         info->version = "";
 204
 205         return TRUE;
 206 }
 207
 208 static cairo_surface_t *
 209 xps_document_render (EvDocument      *document,
 210                      EvRenderContext *rc)
 211 {
 212         GXPSPage        *xps_page;
 213         guint            page_width, page_height;
 214         guint            width, height;
 215         cairo_surface_t *surface;
 216         cairo_t         *cr;
 217         GError          *error = NULL;
 218
 219         xps_page = GXPS_PAGE (rc->page->backend_page);
 220
 221         gxps_page_get_size (xps_page, &page_width, &page_height);
 222         if (rc->rotation == 90 || rc->rotation == 270) {
 223                 width = (guint) ((page_height * rc->scale) + 0.5);
 224                 height = (guint) ((page_width * rc->scale) + 0.5);
 225         } else {
 226                 width = (guint) ((page_width * rc->scale) + 0.5);
 227                 height = (guint) ((page_height * rc->scale) + 0.5);
 228         }
 229
 230         surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
 231                                               width, height);
 232         cr = cairo_create (surface);
 233
 234         cairo_set_source_rgb (cr, 1., 1., 1.);
 235         cairo_paint (cr);
 236
 237         switch (rc->rotation) {
 238         case 90:
 239                 cairo_translate (cr, width, 0);
 240                 break;
 241         case 180:
 242                 cairo_translate (cr, width, height);
 243                 break;
 244         case 270:
 245                 cairo_translate (cr, 0, height);
 246                 break;
 247         default:
 248                 cairo_translate (cr, 0, 0);
 249         }
 250
 251         cairo_scale (cr, rc->scale, rc->scale);
 252         cairo_rotate (cr, rc->rotation * G_PI / 180.0);
 253         gxps_page_render (xps_page, cr, &error);
 254         cairo_destroy (cr);
 255
 256         if (error) {
 257                 g_warning ("Error rendering page %d: %s\n",
 258                            rc->page->index, error->message);
 259                 g_error_free (error);
 260         }
 261
 262         return surface;
 263 }
 264
 265 static void
 266 xps_document_class_init (XPSDocumentClass *klass)
 267 {
 268         GObjectClass    *object_class = G_OBJECT_CLASS (klass);
 269         EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
 270
 271         object_class->dispose = xps_document_dispose;
 272
 273         ev_document_class->load = xps_document_load;
 274         ev_document_class->save = xps_document_save;
 275         ev_document_class->get_n_pages = xps_document_get_n_pages;
 276         ev_document_class->get_page = xps_document_get_page;
 277         ev_document_class->get_page_size = xps_document_get_page_size;
 278         ev_document_class->get_info = xps_document_get_info;
 279         ev_document_class->get_backend_info = xps_document_get_backend_info;
 280         ev_document_class->render = xps_document_render;
 281 }
 282
 283 /* EvDocumentLinks */
 284 static gboolean
 285 xps_document_links_has_document_links (EvDocumentLinks *document_links)
 286 {
 287         XPSDocument           *xps_document = XPS_DOCUMENT (document_links);
 288         GXPSDocumentStructure *structure;
 289         gboolean               retval;
 290
 291         structure = gxps_document_get_structure (xps_document->doc);
 292         if (!structure)
 293                 return FALSE;
 294
 295         retval = gxps_document_structure_has_outline (structure);
 296         g_object_unref (structure);
 297
 298         return retval;
 299 }
 300
 301 static EvLink *
 302 ev_link_from_target (XPSDocument    *xps_document,
 303                      GXPSLinkTarget *target)
 304 {
 305         EvLinkAction *ev_action;
 306
 307         if (gxps_link_target_is_internal (target)) {
 308                 EvLinkDest  *dest = NULL;
 309                 guint        doc;
 310                 const gchar *anchor;
 311
 312                 anchor = gxps_link_target_get_anchor (target);
 313
 314                 /* FIXME: multidoc */
 315                 doc = gxps_file_get_document_for_link_target (xps_document->xps, target);
 316                 if (doc == 0) {
 317                         if (!anchor)
 318                                 return NULL;
 319
 320                         dest = ev_link_dest_new_named (anchor);
 321                         ev_action = ev_link_action_new_dest (dest);
 322                 } else {
 323                         gchar *filename;
 324
 325                         /* FIXME: remote uri? */
 326                         filename = g_file_get_path (xps_document->file);
 327
 328                         if (anchor)
 329                                 dest = ev_link_dest_new_named (anchor);
 330                         ev_action = ev_link_action_new_remote (dest, filename);
 331                         g_free (filename);
 332                 }
 333         } else {
 334                 const gchar *uri;
 335
 336                 uri = gxps_link_target_get_uri (target);
 337                 ev_action = ev_link_action_new_external_uri (uri);
 338         }
 339
 340         return ev_link_new (NULL, ev_action);
 341 }
 342
 343 static void
 344 build_tree (XPSDocument     *xps_document,
 345             GtkTreeModel    *model,
 346             GtkTreeIter     *parent,
 347             GXPSOutlineIter *iter)
 348 {
 349         do {
 350                 GtkTreeIter     tree_iter;
 351                 GXPSOutlineIter child_iter;
 352                 EvLink         *link;
 353                 GXPSLinkTarget *target;
 354                 gchar          *title;
 355
 356                 target = gxps_outline_iter_get_target (iter);
 357                 title = g_markup_escape_text (gxps_outline_iter_get_description (iter), -1);
 358                 link = ev_link_from_target (xps_document, target);
 359                 gxps_link_target_free (target);
 360
 361                 gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
 362                 gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
 363                                     EV_DOCUMENT_LINKS_COLUMN_MARKUP, title,
 364                                     EV_DOCUMENT_LINKS_COLUMN_LINK, link,
 365                                     EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
 366                                     -1);
 367                 g_object_unref (link);
 368                 g_free (title);
 369
 370                 if (gxps_outline_iter_children (&child_iter, iter))
 371                         build_tree (xps_document, model, &tree_iter, &child_iter);
 372         } while (gxps_outline_iter_next (iter));
 373 }
 374
 375 static GtkTreeModel *
 376 xps_document_links_get_links_model (EvDocumentLinks *document_links)
 377 {
 378         XPSDocument           *xps_document = XPS_DOCUMENT (document_links);
 379         GXPSDocumentStructure *structure;
 380         GXPSOutlineIter        iter;
 381         GtkTreeModel          *model = NULL;
 382
 383         structure = gxps_document_get_structure (xps_document->doc);
 384         if (!structure)
 385                 return NULL;
 386
 387         if (gxps_document_structure_outline_iter_init (&iter, structure)) {
 388                 model = (GtkTreeModel *) gtk_tree_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 389                                                              G_TYPE_STRING,
 390                                                              G_TYPE_OBJECT,
 391                                                              G_TYPE_BOOLEAN,
 392                                                              G_TYPE_STRING);
 393                 build_tree (xps_document, model, NULL, &iter);
 394         }
 395
 396         g_object_unref (structure);
 397
 398         return model;
 399 }
 400
 401 static EvMappingList *
 402 xps_document_links_get_links (EvDocumentLinks *document_links,
 403                               EvPage          *page)
 404 {
 405         XPSDocument *xps_document = XPS_DOCUMENT (document_links);
 406         GXPSPage    *xps_page;
 407         GList       *retval = NULL;
 408         GList       *mapping_list;
 409         GList       *list;
 410
 411         xps_page = GXPS_PAGE (page->backend_page);
 412         mapping_list = gxps_page_get_links (xps_page, NULL);
 413
 414         for (list = mapping_list; list; list = list->next) {
 415                 GXPSLink *xps_link;
 416                 GXPSLinkTarget *target;
 417                 EvMapping *ev_link_mapping;
 418                 cairo_rectangle_t area;
 419
 420                 xps_link = (GXPSLink *)list->data;
 421                 ev_link_mapping = g_new (EvMapping, 1);
 422                 gxps_link_get_area (xps_link, &area);
 423                 target = gxps_link_get_target (xps_link);
 424                 gxps_link_get_area (xps_link, &area);
 425                 ev_link_mapping->data = ev_link_from_target (xps_document, target);
 426
 427                 ev_link_mapping->area.x1 = area.x;
 428                 ev_link_mapping->area.x2 = area.x + area.width;
 429                 ev_link_mapping->area.y1 = area.y;
 430                 ev_link_mapping->area.y2 = area.y + area.height;
 431
 432                 retval = g_list_prepend (retval, ev_link_mapping);
 433                 gxps_link_free (xps_link);
 434         }
 435
 436         g_list_free (mapping_list);
 437
 438         return ev_mapping_list_new (page->index, g_list_reverse (retval), (GDestroyNotify)g_object_unref);
 439 }
 440
 441 static EvLinkDest *
 442 xps_document_links_find_link_dest (EvDocumentLinks *document_links,
 443                                    const gchar     *link_name)
 444 {
 445         XPSDocument       *xps_document = XPS_DOCUMENT (document_links);
 446         GXPSPage          *xps_page;
 447         gint               page;
 448         cairo_rectangle_t  area;
 449         EvLinkDest        *dest = NULL;
 450
 451         page = gxps_document_get_page_for_anchor (xps_document->doc, link_name);
 452         if (page == -1)
 453                 return NULL;
 454
 455         xps_page = gxps_document_get_page (xps_document->doc, page, NULL);
 456         if (!xps_page)
 457                 return NULL;
 458
 459         if (gxps_page_get_anchor_destination (xps_page, link_name, &area, NULL))
 460                 dest = ev_link_dest_new_xyz (page, area.x, area.y, 1., TRUE, TRUE, FALSE);
 461
 462         g_object_unref (xps_page);
 463
 464         return dest;
 465 }
 466
 467 static gint
 468 xps_document_links_find_link_page (EvDocumentLinks *document_links,
 469                                    const gchar     *link_name)
 470 {
 471         XPSDocument *xps_document = XPS_DOCUMENT (document_links);
 472
 473         return gxps_document_get_page_for_anchor (xps_document->doc, link_name);
 474 }
 475
 476 static void
 477 xps_document_document_links_iface_init (EvDocumentLinksInterface *iface)
 478 {
 479         iface->has_document_links = xps_document_links_has_document_links;
 480         iface->get_links_model = xps_document_links_get_links_model;
 481         iface->get_links = xps_document_links_get_links;
 482         iface->find_link_dest = xps_document_links_find_link_dest;
 483         iface->find_link_page = xps_document_links_find_link_page;
 484 }
 485
 486 /* EvDocumentPrint */
 487 static void
 488 xps_document_print_print_page (EvDocumentPrint *document,
 489                                EvPage          *page,
 490                                cairo_t         *cr)
 491 {
 492         GError *error = NULL;
 493
 494         gxps_page_render (GXPS_PAGE (page->backend_page), cr, &error);
 495         if (error) {
 496                 g_warning ("Error rendering page %d for printing: %s\n",
 497                            page->index, error->message);
 498                 g_error_free (error);
 499         }
 500 }
 501
 502 static void
 503 xps_document_document_print_iface_init (EvDocumentPrintInterface *iface)
 504 {
 505         iface->print_page = xps_document_print_print_page;
 506 }