1 files changed, 706 insertions, 0 deletions
diff --git a/backend/djvu/djvu-document.c b/backend/djvu/djvu-document.c
new file mode 100644
index 00000000..aa0e595d
--- /dev/null
+++ b/backend/djvu/djvu-document.c
@@ -0,0 +1,706 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/*
+ * Copyright (C) 2005, Nickolay V. Shmyrev <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <config.h>
+#include "djvu-document.h"
+#include "djvu-text-page.h"
+#include "djvu-links.h"
+#include "djvu-document-private.h"
+#include "ev-document-thumbnails.h"
+#include "ev-file-exporter.h"
+#include "ev-document-misc.h"
+#include "ev-document-find.h"
+#include "ev-document-links.h"
+#include "ev-selection.h"
+#include "ev-file-helpers.h"
+
+#include <glib.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <glib/gi18n-lib.h>
+#include <string.h>
+
+#define SCALE_FACTOR 0.2
+
+enum {
+ PROP_0,
+ PROP_TITLE
+};
+
+struct _DjvuDocumentClass
+{
+ EvDocumentClass parent_class;
+};
+
+typedef struct _DjvuDocumentClass DjvuDocumentClass;
+
+static void djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
+static void djvu_document_file_exporter_iface_init (EvFileExporterInterface *iface);
+static void djvu_document_find_iface_init (EvDocumentFindInterface *iface);
+static void djvu_document_document_links_iface_init (EvDocumentLinksInterface *iface);
+static void djvu_selection_iface_init (EvSelectionInterface *iface);
+
+EV_BACKEND_REGISTER_WITH_CODE (DjvuDocument, djvu_document,
+ {
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, djvu_document_document_thumbnails_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, djvu_document_file_exporter_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND, djvu_document_find_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS, djvu_document_document_links_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_SELECTION, djvu_selection_iface_init);
+ });
+
+
+#define EV_DJVU_ERROR ev_djvu_error_quark ()
+
+static GQuark
+ev_djvu_error_quark (void)
+{
+ static GQuark q = 0;
+ if (q == 0)
+ q = g_quark_from_string ("ev-djvu-quark");
+ 
+ return q;
+}
+
+static void
+handle_message (const ddjvu_message_t *msg, GError **error)
+{
+ switch (msg->m_any.tag) {
+ case DDJVU_ERROR: {
+ gchar *error_str;
+ 
+ if (msg->m_error.filename) {
+ error_str = g_strdup_printf ("DjvuLibre error: %s:%d",
+ msg->m_error.filename,
+ msg->m_error.lineno);
+ } else {
+ error_str = g_strdup_printf ("DjvuLibre error: %s",
+ msg->m_error.message);
+ }
+ 
+ if (error) {
+ g_set_error_literal (error, EV_DJVU_ERROR, 0, error_str);
+ } else {
+ g_warning ("%s", error_str);
+ }
+ 
+ g_free (error_str);
+ return;
+ } 
+ break;
+ default:
+ break;
+ }
+}
+
+void
+djvu_handle_events (DjvuDocument *djvu_document, int wait, GError **error)
+{
+ ddjvu_context_t *ctx = djvu_document->d_context;
+ const ddjvu_message_t *msg;
+ 
+ if (!ctx)
+ return;
+
+ if (wait)
+ ddjvu_message_wait (ctx);
+
+ while ((msg = ddjvu_message_peek (ctx))) {
+ handle_message (msg, error);
+ ddjvu_message_pop (ctx);
+ if (error && *error)
+ return;
+ }
+}
+
+static void
+djvu_wait_for_message (DjvuDocument *djvu_document, ddjvu_message_tag_t message, GError **error)
+{
+ ddjvu_context_t *ctx = djvu_document->d_context;
+ const ddjvu_message_t *msg;
+
+ ddjvu_message_wait (ctx);
+ while ((msg = ddjvu_message_peek (ctx)) && (msg->m_any.tag != message)) {
+ handle_message (msg, error);
+ ddjvu_message_pop (ctx);
+ if (error && *error)
+ return;
+ }
+ if (msg && msg->m_any.tag == message)
+ ddjvu_message_pop (ctx);
+}
+
+static gboolean
+djvu_document_load (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ ddjvu_document_t *doc;
+ gchar *filename;
+ gboolean missing_files = FALSE;
+ GError *djvu_error = NULL;
+
+ /* FIXME: We could actually load uris */
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+ 
+ doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
+
+ if (!doc) {
+ g_free (filename);
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("DjVu document has incorrect format"));
+ return FALSE;
+ }
+
+ if (djvu_document->d_document)
+ ddjvu_document_release (djvu_document->d_document);
+
+ djvu_document->d_document = doc;
+
+ djvu_wait_for_message (djvu_document, DDJVU_DOCINFO, &djvu_error);
+ if (djvu_error) {
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ djvu_error->message);
+ g_error_free (djvu_error);
+ g_free (filename);
+ ddjvu_document_release (djvu_document->d_document);
+ djvu_document->d_document = NULL;
+
+ return FALSE;
+ }
+
+ if (ddjvu_document_decoding_error (djvu_document->d_document))
+ djvu_handle_events (djvu_document, TRUE, &djvu_error);
+
+ if (djvu_error) {
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ djvu_error->message);
+ g_error_free (djvu_error);
+ g_free (filename);
+ ddjvu_document_release (djvu_document->d_document);
+ djvu_document->d_document = NULL;
+ 
+ return FALSE;
+ }
+ 
+ g_free (djvu_document->uri);
+ djvu_document->uri = g_strdup (uri);
+
+ if (ddjvu_document_get_type (djvu_document->d_document) == DDJVU_DOCTYPE_INDIRECT) {
+ gint n_files;
+ gint i;
+ gchar *base;
+
+ base = g_path_get_dirname (filename);
+
+ n_files = ddjvu_document_get_filenum (djvu_document->d_document);
+ for (i = 0; i < n_files; i++) {
+ struct ddjvu_fileinfo_s fileinfo;
+ gchar *file;
+ 
+ ddjvu_document_get_fileinfo (djvu_document->d_document,
+ i, &fileinfo);
+
+ if (fileinfo.type != 'P')
+ continue;
+
+ file = g_build_filename (base, fileinfo.id, NULL);
+ if (!g_file_test (file, G_FILE_TEST_EXISTS)) {
+ missing_files = TRUE;
+ g_free (file);
+ 
+ break;
+ }
+ g_free (file);
+ }
+ g_free (base);
+ }
+ g_free (filename);
+
+ if (missing_files) {
+ g_set_error_literal (error,
+ G_FILE_ERROR,
+ G_FILE_ERROR_EXIST,
+ _("The document is composed of several files. "
+ "One or more of these files cannot be accessed."));
+
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
+static gboolean
+djvu_document_save (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+
+ return ev_xfer_uri_simple (djvu_document->uri, uri, error);
+}
+
+int
+djvu_document_get_n_pages (EvDocument *document)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ 
+ g_return_val_if_fail (djvu_document->d_document, 0);
+ 
+ return ddjvu_document_get_pagenum (djvu_document->d_document);
+}
+
+static void
+document_get_page_size (DjvuDocument *djvu_document,
+ gint page,
+ double *width,
+ double *height)
+{
+ ddjvu_pageinfo_t info;
+ ddjvu_status_t r;
+ 
+ while ((r = ddjvu_document_get_pageinfo(djvu_document->d_document, page, &info)) < DDJVU_JOB_OK)
+ djvu_handle_events(djvu_document, TRUE, NULL);
+ 
+ if (r >= DDJVU_JOB_FAILED)
+ djvu_handle_events(djvu_document, TRUE, NULL);
+
+ *width = info.width * SCALE_FACTOR; 
+ *height = info.height * SCALE_FACTOR;
+}
+
+static void
+djvu_document_get_page_size (EvDocument *document,
+ EvPage *page,
+ double *width,
+ double *height)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+
+ g_return_if_fail (djvu_document->d_document);
+
+ document_get_page_size (djvu_document, page->index,
+ width, height);
+}
+
+static cairo_surface_t *
+djvu_document_render (EvDocument *document, 
+ EvRenderContext *rc)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ cairo_surface_t *surface;
+ gchar *pixels;
+ gint rowstride;
+ ddjvu_rect_t rrect;
+ ddjvu_rect_t prect;
+ ddjvu_page_t *d_page;
+ ddjvu_page_rotation_t rotation;
+ double page_width, page_height, tmp;
+
+ d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, rc->page->index);
+ 
+ while (!ddjvu_page_decoding_done (d_page))
+ djvu_handle_events(djvu_document, TRUE, NULL);
+
+ page_width = ddjvu_page_get_width (d_page) * rc->scale * SCALE_FACTOR + 0.5;
+ page_height = ddjvu_page_get_height (d_page) * rc->scale * SCALE_FACTOR + 0.5;
+ 
+ switch (rc->rotation) {
+ case 90:
+ rotation = DDJVU_ROTATE_90;
+ tmp = page_height;
+ page_height = page_width;
+ page_width = tmp;
+ 
+ break;
+ case 180:
+ rotation = DDJVU_ROTATE_180;
+ 
+ break;
+ case 270:
+ rotation = DDJVU_ROTATE_270;
+ tmp = page_height;
+ page_height = page_width;
+ page_width = tmp;
+ 
+ break;
+ default:
+ rotation = DDJVU_ROTATE_0;
+ }
+
+ surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+ page_width, page_height);
+ rowstride = cairo_image_surface_get_stride (surface);
+ pixels = (gchar *)cairo_image_surface_get_data (surface);
+
+ prect.x = 0;
+ prect.y = 0;
+ prect.w = page_width;
+ prect.h = page_height;
+ rrect = prect;
+
+ ddjvu_page_set_rotation (d_page, rotation);
+ 
+ ddjvu_page_render (d_page, DDJVU_RENDER_COLOR,
+ &prect,
+ &rrect,
+ djvu_document->d_format,
+ rowstride,
+ pixels);
+
+ cairo_surface_mark_dirty (surface);
+
+ return surface;
+}
+
+static void
+djvu_document_finalize (GObject *object)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
+
+ if (djvu_document->d_document)
+ ddjvu_document_release (djvu_document->d_document);
+ 
+ if (djvu_document->opts)
+ g_string_free (djvu_document->opts, TRUE);
+
+ if (djvu_document->ps_filename)
+ g_free (djvu_document->ps_filename);
+ 
+ ddjvu_context_release (djvu_document->d_context);
+ ddjvu_format_release (djvu_document->d_format);
+ ddjvu_format_release (djvu_document->thumbs_format);
+ g_free (djvu_document->uri);
+ 
+ G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
+}
+
+static void
+djvu_document_class_init (DjvuDocumentClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
+
+ gobject_class->finalize = djvu_document_finalize;
+
+ ev_document_class->load = djvu_document_load;
+ ev_document_class->save = djvu_document_save;
+ ev_document_class->get_n_pages = djvu_document_get_n_pages;
+ ev_document_class->get_page_size = djvu_document_get_page_size;
+ ev_document_class->render = djvu_document_render;
+}
+
+static gchar *
+djvu_text_copy (DjvuDocument *djvu_document,
+ gint page,
+ EvRectangle *rectangle)
+{
+ miniexp_t page_text;
+ gchar *text = NULL;
+
+ while ((page_text =
+ ddjvu_document_get_pagetext (djvu_document->d_document,
+ page, "char")) == miniexp_dummy)
+ djvu_handle_events (djvu_document, TRUE, NULL);
+
+ if (page_text != miniexp_nil) {
+ DjvuTextPage *page = djvu_text_page_new (page_text);
+ 
+ text = djvu_text_page_copy (page, rectangle);
+ djvu_text_page_free (page);
+ ddjvu_miniexp_release (djvu_document->d_document, page_text);
+ }
+
+ return text;
+}
+
+static gchar *
+djvu_selection_get_selected_text (EvSelection *selection,
+ EvPage *page,
+ EvSelectionStyle style,
+ EvRectangle *points)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (selection);
+ double width, height;
+ EvRectangle rectangle;
+ gchar *text;
+ 
+ djvu_document_get_page_size (EV_DOCUMENT (djvu_document),
+ page, &width, &height);
+ rectangle.x1 = points->x1 / SCALE_FACTOR;
+ rectangle.y1 = (height - points->y2) / SCALE_FACTOR;
+ rectangle.x2 = points->x2 / SCALE_FACTOR;
+ rectangle.y2 = (height - points->y1) / SCALE_FACTOR;
+ 
+ text = djvu_text_copy (djvu_document, page->index, &rectangle);
+ 
+ if (text == NULL)
+ text = g_strdup ("");
+ 
+ return text;
+}
+
+static void
+djvu_selection_iface_init (EvSelectionInterface *iface)
+{
+ iface->get_selected_text = djvu_selection_get_selected_text;
+}
+
+static void
+djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
+ EvRenderContext *rc, 
+ gint *width,
+ gint *height)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document); 
+ gdouble page_width, page_height;
+ 
+ djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
+ &page_width, &page_height);
+
+ if (rc->rotation == 90 || rc->rotation == 270) {
+ *width = (gint) (page_height * rc->scale);
+ *height = (gint) (page_width * rc->scale);
+ } else {
+ *width = (gint) (page_width * rc->scale);
+ *height = (gint) (page_height * rc->scale);
+ }
+}
+
+static GdkPixbuf *
+djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
+ EvRenderContext *rc,
+ gboolean border)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ GdkPixbuf *pixbuf, *rotated_pixbuf;
+ gdouble page_width, page_height;
+ gint thumb_width, thumb_height;
+ guchar *pixels;
+ 
+ g_return_val_if_fail (djvu_document->d_document, NULL);
+
+ djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
+ &page_width, &page_height);
+ 
+ thumb_width = (gint) (page_width * rc->scale);
+ thumb_height = (gint) (page_height * rc->scale);
+
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
+ thumb_width, thumb_height);
+ gdk_pixbuf_fill (pixbuf, 0xffffffff);
+ pixels = gdk_pixbuf_get_pixels (pixbuf);
+ 
+ while (ddjvu_thumbnail_status (djvu_document->d_document, rc->page->index, 1) < DDJVU_JOB_OK)
+ djvu_handle_events(djvu_document, TRUE, NULL);
+ 
+ ddjvu_thumbnail_render (djvu_document->d_document, rc->page->index, 
+ &thumb_width, &thumb_height,
+ djvu_document->thumbs_format,
+ gdk_pixbuf_get_rowstride (pixbuf), 
+ (gchar *)pixels);
+
+ rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
+ g_object_unref (pixbuf);
+
+ if (border) {
+ GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
+ 
+ rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
+ g_object_unref (tmp_pixbuf);
+ }
+ 
+ return rotated_pixbuf;
+}
+
+static void
+djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
+{
+ iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
+ iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
+}
+
+/* EvFileExporterIface */
+static void
+djvu_document_file_exporter_begin (EvFileExporter *exporter,
+ EvFileExporterContext *fc)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
+ 
+ if (djvu_document->ps_filename)
+ g_free (djvu_document->ps_filename); 
+ djvu_document->ps_filename = g_strdup (fc->filename);
+
+ g_string_assign (djvu_document->opts, "-page=");
+}
+
+static void
+djvu_document_file_exporter_do_page (EvFileExporter *exporter,
+ EvRenderContext *rc)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
+ 
+ g_string_append_printf (djvu_document->opts, "%d,", (rc->page->index) + 1); 
+}
+
+static void
+djvu_document_file_exporter_end (EvFileExporter *exporter)
+{
+ int d_optc = 1; 
+ const char *d_optv[d_optc];
+
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
+
+ FILE *fn = fopen (djvu_document->ps_filename, "w");
+ if (fn == NULL) {
+ g_warning ("Cannot open file “%s”.", djvu_document->ps_filename);
+ return;
+ }
+ 
+ d_optv[0] = djvu_document->opts->str; 
+
+ ddjvu_job_t * job = ddjvu_document_print(djvu_document->d_document, fn, d_optc, d_optv);
+ while (!ddjvu_job_done(job)) { 
+ djvu_handle_events (djvu_document, TRUE, NULL);
+ }
+
+ fclose(fn); 
+}
+
+static EvFileExporterCapabilities
+djvu_document_file_exporter_get_capabilities (EvFileExporter *exporter)
+{
+ return EV_FILE_EXPORTER_CAN_PAGE_SET |
+ EV_FILE_EXPORTER_CAN_COPIES |
+ EV_FILE_EXPORTER_CAN_COLLATE |
+ EV_FILE_EXPORTER_CAN_REVERSE |
+ EV_FILE_EXPORTER_CAN_GENERATE_PS;
+}
+
+static void
+djvu_document_file_exporter_iface_init (EvFileExporterInterface *iface)
+{
+ iface->begin = djvu_document_file_exporter_begin;
+ iface->do_page = djvu_document_file_exporter_do_page;
+ iface->end = djvu_document_file_exporter_end;
+ iface->get_capabilities = djvu_document_file_exporter_get_capabilities;
+}
+
+static void
+djvu_document_init (DjvuDocument *djvu_document)
+{
+ guint masks[4] = { 0xff0000, 0xff00, 0xff, 0xff000000 };
+ 
+ djvu_document->d_context = ddjvu_context_create ("Evince");
+ djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGBMASK32, 4, masks);
+ ddjvu_format_set_row_order (djvu_document->d_format, 1);
+
+ djvu_document->thumbs_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
+ ddjvu_format_set_row_order (djvu_document->thumbs_format, 1);
+
+ djvu_document->ps_filename = NULL;
+ djvu_document->opts = g_string_new ("");
+ 
+ djvu_document->d_document = NULL;
+}
+
+static GList *
+djvu_document_find_find_text (EvDocumentFind *document,
+ EvPage *page,
+ const char *text,
+ gboolean case_sensitive)
+{
+ DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
+ miniexp_t page_text;
+ gdouble width, height;
+ GList *matches = NULL, *l;
+
+ g_return_val_if_fail (text != NULL, NULL);
+
+ while ((page_text = ddjvu_document_get_pagetext (djvu_document->d_document,
+ page->index,
+ "char")) == miniexp_dummy)
+ djvu_handle_events (djvu_document, TRUE, NULL);
+
+ if (page_text != miniexp_nil) {
+ DjvuTextPage *tpage = djvu_text_page_new (page_text);
+ 
+ djvu_text_page_prepare_search (tpage, case_sensitive);
+ if (tpage->links->len > 0) {
+ djvu_text_page_search (tpage, text);
+ matches = tpage->results;
+ }
+ djvu_text_page_free (tpage);
+ ddjvu_miniexp_release (djvu_document->d_document, page_text);
+ }
+
+ if (!matches)
+ return NULL;
+
+ document_get_page_size (djvu_document, page->index, &width, &height);
+ for (l = matches; l && l->data; l = g_list_next (l)) {
+ EvRectangle *r = (EvRectangle *)l->data;
+ gdouble tmp;
+
+ tmp = r->y1;
+ 
+ r->x1 *= SCALE_FACTOR;
+ r->x2 *= SCALE_FACTOR;
+
+ tmp = r->y1;
+ r->y1 = height - r->y2 * SCALE_FACTOR;
+ r->y2 = height - tmp * SCALE_FACTOR;
+ }
+ 
+
+ return matches;
+}
+
+static void
+djvu_document_find_iface_init (EvDocumentFindInterface *iface)
+{
+ iface->find_text = djvu_document_find_find_text;
+}
+
+static EvMappingList *
+djvu_document_links_get_links (EvDocumentLinks *document_links,
+ EvPage *page)
+{
+ return djvu_links_get_links (document_links, page->index, SCALE_FACTOR);
+}
+
+static void
+djvu_document_document_links_iface_init (EvDocumentLinksInterface *iface)
+{
+ iface->has_document_links = djvu_links_has_document_links;
+ iface->get_links_model = djvu_links_get_links_model;
+ iface->get_links = djvu_document_links_get_links;
+ iface->find_link_dest = djvu_links_find_link_dest;
+}