1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
3 * Copyright (C) 2005, Nickolay V. Shmyrev <nshmyrev@yandex.ru>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include "djvu-document.h"
24 #include "djvu-text-page.h"
25 #include "djvu-links.h"
26 #include "djvu-document-private.h"
27 #include "ev-document-thumbnails.h"
28 #include "ev-file-exporter.h"
29 #include "ev-document-misc.h"
30 #include "ev-document-find.h"
31 #include "ev-document-links.h"
32 #include "ev-selection.h"
33 #include "ev-file-helpers.h"
36 #include <gdk-pixbuf/gdk-pixbuf.h>
37 #include <glib/gi18n-lib.h>
40 #define SCALE_FACTOR 0.2
47 struct _DjvuDocumentClass
49 EvDocumentClass parent_class;
52 typedef struct _DjvuDocumentClass DjvuDocumentClass;
54 static void djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
55 static void djvu_document_file_exporter_iface_init (EvFileExporterIface *iface);
56 static void djvu_document_find_iface_init (EvDocumentFindIface *iface);
57 static void djvu_document_document_links_iface_init (EvDocumentLinksIface *iface);
58 static void djvu_selection_iface_init (EvSelectionIface *iface);
60 EV_BACKEND_REGISTER_WITH_CODE (DjvuDocument, djvu_document,
62 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, djvu_document_document_thumbnails_iface_init);
63 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, djvu_document_file_exporter_iface_init);
64 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND, djvu_document_find_iface_init);
65 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS, djvu_document_document_links_iface_init);
66 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_SELECTION, djvu_selection_iface_init);
70 #define EV_DJVU_ERROR ev_djvu_error_quark ()
73 ev_djvu_error_quark (void)
77 q = g_quark_from_string ("ev-djvu-quark");
83 handle_message (const ddjvu_message_t *msg, GError **error)
85 switch (msg->m_any.tag) {
89 if (msg->m_error.filename) {
90 error_str = g_strdup_printf ("DjvuLibre error: %s:%d",
91 msg->m_error.filename,
94 error_str = g_strdup_printf ("DjvuLibre error: %s",
95 msg->m_error.message);
99 g_set_error_literal (error, EV_DJVU_ERROR, 0, error_str);
101 g_warning ("%s", error_str);
114 djvu_handle_events (DjvuDocument *djvu_document, int wait, GError **error)
116 ddjvu_context_t *ctx = djvu_document->d_context;
117 const ddjvu_message_t *msg;
123 ddjvu_message_wait (ctx);
125 while ((msg = ddjvu_message_peek (ctx))) {
126 handle_message (msg, error);
127 ddjvu_message_pop (ctx);
134 djvu_wait_for_message (DjvuDocument *djvu_document, ddjvu_message_tag_t message, GError **error)
136 ddjvu_context_t *ctx = djvu_document->d_context;
137 const ddjvu_message_t *msg;
139 ddjvu_message_wait (ctx);
140 while ((msg = ddjvu_message_peek (ctx)) && (msg->m_any.tag != message)) {
141 handle_message (msg, error);
142 ddjvu_message_pop (ctx);
146 if (msg && msg->m_any.tag == message)
147 ddjvu_message_pop (ctx);
151 djvu_document_load (EvDocument *document,
155 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
156 ddjvu_document_t *doc;
158 gboolean missing_files = FALSE;
159 GError *djvu_error = NULL;
161 /* FIXME: We could actually load uris */
162 filename = g_filename_from_uri (uri, NULL, error);
166 doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
170 g_set_error_literal (error,
172 EV_DOCUMENT_ERROR_INVALID,
173 _("DjVu document has incorrect format"));
177 if (djvu_document->d_document)
178 ddjvu_document_release (djvu_document->d_document);
180 djvu_document->d_document = doc;
182 djvu_wait_for_message (djvu_document, DDJVU_DOCINFO, &djvu_error);
184 g_set_error_literal (error,
186 EV_DOCUMENT_ERROR_INVALID,
187 djvu_error->message);
188 g_error_free (djvu_error);
190 ddjvu_document_release (djvu_document->d_document);
191 djvu_document->d_document = NULL;
196 if (ddjvu_document_decoding_error (djvu_document->d_document))
197 djvu_handle_events (djvu_document, TRUE, &djvu_error);
200 g_set_error_literal (error,
202 EV_DOCUMENT_ERROR_INVALID,
203 djvu_error->message);
204 g_error_free (djvu_error);
206 ddjvu_document_release (djvu_document->d_document);
207 djvu_document->d_document = NULL;
212 g_free (djvu_document->uri);
213 djvu_document->uri = g_strdup (uri);
215 if (ddjvu_document_get_type (djvu_document->d_document) == DDJVU_DOCTYPE_INDIRECT) {
220 base = g_path_get_dirname (filename);
222 n_files = ddjvu_document_get_filenum (djvu_document->d_document);
223 for (i = 0; i < n_files; i++) {
224 struct ddjvu_fileinfo_s fileinfo;
227 ddjvu_document_get_fileinfo (djvu_document->d_document,
230 if (fileinfo.type != 'P')
233 file = g_build_filename (base, fileinfo.id, NULL);
234 if (!g_file_test (file, G_FILE_TEST_EXISTS)) {
235 missing_files = TRUE;
247 g_set_error_literal (error,
250 _("The document is composed of several files. "
251 "One or more of these files cannot be accessed."));
261 djvu_document_save (EvDocument *document,
265 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
267 return ev_xfer_uri_simple (djvu_document->uri, uri, error);
271 djvu_document_get_n_pages (EvDocument *document)
273 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
275 g_return_val_if_fail (djvu_document->d_document, 0);
277 return ddjvu_document_get_pagenum (djvu_document->d_document);
281 document_get_page_size (DjvuDocument *djvu_document,
286 ddjvu_pageinfo_t info;
289 while ((r = ddjvu_document_get_pageinfo(djvu_document->d_document, page, &info)) < DDJVU_JOB_OK)
290 djvu_handle_events(djvu_document, TRUE, NULL);
292 if (r >= DDJVU_JOB_FAILED)
293 djvu_handle_events(djvu_document, TRUE, NULL);
295 *width = info.width * SCALE_FACTOR;
296 *height = info.height * SCALE_FACTOR;
300 djvu_document_get_page_size (EvDocument *document,
305 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
307 g_return_if_fail (djvu_document->d_document);
309 document_get_page_size (djvu_document, page->index,
313 static cairo_surface_t *
314 djvu_document_render (EvDocument *document,
317 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
318 cairo_surface_t *surface;
323 ddjvu_page_t *d_page;
324 ddjvu_page_rotation_t rotation;
325 double page_width, page_height, tmp;
326 static const cairo_user_data_key_t key;
328 d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, rc->page->index);
330 while (!ddjvu_page_decoding_done (d_page))
331 djvu_handle_events(djvu_document, TRUE, NULL);
333 page_width = ddjvu_page_get_width (d_page) * rc->scale * SCALE_FACTOR + 0.5;
334 page_height = ddjvu_page_get_height (d_page) * rc->scale * SCALE_FACTOR + 0.5;
336 switch (rc->rotation) {
338 rotation = DDJVU_ROTATE_90;
340 page_height = page_width;
345 rotation = DDJVU_ROTATE_180;
349 rotation = DDJVU_ROTATE_270;
351 page_height = page_width;
356 rotation = DDJVU_ROTATE_0;
358 #ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
359 rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, page_width);
361 rowstride = page_width * 4;
363 pixels = (gchar *) g_malloc (page_height * rowstride);
364 surface = cairo_image_surface_create_for_data ((guchar *)pixels,
369 cairo_surface_set_user_data (surface, &key,
370 pixels, (cairo_destroy_func_t)g_free);
373 prect.w = page_width;
374 prect.h = page_height;
377 ddjvu_page_set_rotation (d_page, rotation);
379 ddjvu_page_render (d_page, DDJVU_RENDER_COLOR,
382 djvu_document->d_format,
390 djvu_document_finalize (GObject *object)
392 DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
394 if (djvu_document->d_document)
395 ddjvu_document_release (djvu_document->d_document);
397 if (djvu_document->opts)
398 g_string_free (djvu_document->opts, TRUE);
400 if (djvu_document->ps_filename)
401 g_free (djvu_document->ps_filename);
403 ddjvu_context_release (djvu_document->d_context);
404 ddjvu_format_release (djvu_document->d_format);
405 ddjvu_format_release (djvu_document->thumbs_format);
406 g_free (djvu_document->uri);
408 G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
412 djvu_document_class_init (DjvuDocumentClass *klass)
414 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
415 EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
417 gobject_class->finalize = djvu_document_finalize;
419 ev_document_class->load = djvu_document_load;
420 ev_document_class->save = djvu_document_save;
421 ev_document_class->get_n_pages = djvu_document_get_n_pages;
422 ev_document_class->get_page_size = djvu_document_get_page_size;
423 ev_document_class->render = djvu_document_render;
427 djvu_text_copy (DjvuDocument *djvu_document,
429 EvRectangle *rectangle)
435 ddjvu_document_get_pagetext (djvu_document->d_document,
436 page, "char")) == miniexp_dummy)
437 djvu_handle_events (djvu_document, TRUE, NULL);
439 if (page_text != miniexp_nil) {
440 DjvuTextPage *page = djvu_text_page_new (page_text);
442 text = djvu_text_page_copy (page, rectangle);
443 djvu_text_page_free (page);
444 ddjvu_miniexp_release (djvu_document->d_document, page_text);
451 djvu_selection_get_selected_text (EvSelection *selection,
453 EvSelectionStyle style,
456 DjvuDocument *djvu_document = DJVU_DOCUMENT (selection);
457 double width, height;
458 EvRectangle rectangle;
461 djvu_document_get_page_size (EV_DOCUMENT (djvu_document),
462 rc->page, &width, &height);
463 rectangle.x1 = points->x1 / SCALE_FACTOR;
464 rectangle.y1 = (height - points->y2) / SCALE_FACTOR;
465 rectangle.x2 = points->x2 / SCALE_FACTOR;
466 rectangle.y2 = (height - points->y1) / SCALE_FACTOR;
468 text = djvu_text_copy (djvu_document, rc->page->index, &rectangle);
471 text = g_strdup ("");
477 djvu_selection_iface_init (EvSelectionIface *iface)
479 iface->get_selected_text = djvu_selection_get_selected_text;
483 djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
488 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
489 gdouble page_width, page_height;
491 djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
492 &page_width, &page_height);
494 if (rc->rotation == 90 || rc->rotation == 270) {
495 *width = (gint) (page_height * rc->scale);
496 *height = (gint) (page_width * rc->scale);
498 *width = (gint) (page_width * rc->scale);
499 *height = (gint) (page_height * rc->scale);
504 djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
508 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
509 GdkPixbuf *pixbuf, *rotated_pixbuf;
510 gdouble page_width, page_height;
511 gint thumb_width, thumb_height;
514 g_return_val_if_fail (djvu_document->d_document, NULL);
516 djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
517 &page_width, &page_height);
519 thumb_width = (gint) (page_width * rc->scale);
520 thumb_height = (gint) (page_height * rc->scale);
522 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
523 thumb_width, thumb_height);
524 gdk_pixbuf_fill (pixbuf, 0xffffffff);
525 pixels = gdk_pixbuf_get_pixels (pixbuf);
527 while (ddjvu_thumbnail_status (djvu_document->d_document, rc->page->index, 1) < DDJVU_JOB_OK)
528 djvu_handle_events(djvu_document, TRUE, NULL);
530 ddjvu_thumbnail_render (djvu_document->d_document, rc->page->index,
531 &thumb_width, &thumb_height,
532 djvu_document->thumbs_format,
533 gdk_pixbuf_get_rowstride (pixbuf),
536 rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
537 g_object_unref (pixbuf);
540 GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
542 rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
543 g_object_unref (tmp_pixbuf);
546 return rotated_pixbuf;
550 djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
552 iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
553 iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
556 /* EvFileExporterIface */
558 djvu_document_file_exporter_begin (EvFileExporter *exporter,
559 EvFileExporterContext *fc)
561 DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
563 if (djvu_document->ps_filename)
564 g_free (djvu_document->ps_filename);
565 djvu_document->ps_filename = g_strdup (fc->filename);
567 g_string_assign (djvu_document->opts, "-page=");
571 djvu_document_file_exporter_do_page (EvFileExporter *exporter,
574 DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
576 g_string_append_printf (djvu_document->opts, "%d,", (rc->page->index) + 1);
580 djvu_document_file_exporter_end (EvFileExporter *exporter)
583 const char *d_optv[d_optc];
585 DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
587 FILE *fn = fopen (djvu_document->ps_filename, "w");
589 g_warning ("Cannot open file ā%sā.", djvu_document->ps_filename);
593 d_optv[0] = djvu_document->opts->str;
595 ddjvu_job_t * job = ddjvu_document_print(djvu_document->d_document, fn, d_optc, d_optv);
596 while (!ddjvu_job_done(job)) {
597 djvu_handle_events (djvu_document, TRUE, NULL);
603 static EvFileExporterCapabilities
604 djvu_document_file_exporter_get_capabilities (EvFileExporter *exporter)
606 return EV_FILE_EXPORTER_CAN_PAGE_SET |
607 EV_FILE_EXPORTER_CAN_COPIES |
608 EV_FILE_EXPORTER_CAN_COLLATE |
609 EV_FILE_EXPORTER_CAN_REVERSE |
610 EV_FILE_EXPORTER_CAN_GENERATE_PS;
614 djvu_document_file_exporter_iface_init (EvFileExporterIface *iface)
616 iface->begin = djvu_document_file_exporter_begin;
617 iface->do_page = djvu_document_file_exporter_do_page;
618 iface->end = djvu_document_file_exporter_end;
619 iface->get_capabilities = djvu_document_file_exporter_get_capabilities;
623 djvu_document_init (DjvuDocument *djvu_document)
625 guint masks[4] = { 0xff0000, 0xff00, 0xff, 0xff000000 };
627 djvu_document->d_context = ddjvu_context_create ("Evince");
628 djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGBMASK32, 4, masks);
629 ddjvu_format_set_row_order (djvu_document->d_format, 1);
631 djvu_document->thumbs_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
632 ddjvu_format_set_row_order (djvu_document->thumbs_format, 1);
634 djvu_document->ps_filename = NULL;
635 djvu_document->opts = g_string_new ("");
637 djvu_document->d_document = NULL;
641 djvu_document_find_find_text (EvDocumentFind *document,
644 gboolean case_sensitive)
646 DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
648 gdouble width, height;
649 GList *matches = NULL, *l;
651 g_return_val_if_fail (text != NULL, NULL);
653 while ((page_text = ddjvu_document_get_pagetext (djvu_document->d_document,
655 "char")) == miniexp_dummy)
656 djvu_handle_events (djvu_document, TRUE, NULL);
658 if (page_text != miniexp_nil) {
659 DjvuTextPage *tpage = djvu_text_page_new (page_text);
661 djvu_text_page_prepare_search (tpage, case_sensitive);
662 if (tpage->links->len > 0) {
663 djvu_text_page_search (tpage, text);
664 matches = tpage->results;
666 djvu_text_page_free (tpage);
667 ddjvu_miniexp_release (djvu_document->d_document, page_text);
673 document_get_page_size (djvu_document, page->index, &width, &height);
674 for (l = matches; l && l->data; l = g_list_next (l)) {
675 EvRectangle *r = (EvRectangle *)l->data;
680 r->x1 *= SCALE_FACTOR;
681 r->x2 *= SCALE_FACTOR;
684 r->y1 = height - r->y2 * SCALE_FACTOR;
685 r->y2 = height - tmp * SCALE_FACTOR;
693 djvu_document_find_iface_init (EvDocumentFindIface *iface)
695 iface->find_text = djvu_document_find_find_text;
699 djvu_document_links_get_links (EvDocumentLinks *document_links,
702 return djvu_links_get_links (document_links, page->index, SCALE_FACTOR);
706 djvu_document_document_links_iface_init (EvDocumentLinksIface *iface)
708 iface->has_document_links = djvu_links_has_document_links;
709 iface->get_links_model = djvu_links_get_links_model;
710 iface->get_links = djvu_document_links_get_links;
711 iface->find_link_dest = djvu_links_find_link_dest;