[djvu] Implement document_links_find_link_page()

[evince.git] / backend / djvu / djvu-links.c

diff --git a/backend/djvu/djvu-links.c b/backend/djvu/djvu-links.c
index d13af0be49ab4ecf1a76399ad499022b6d324c4e..e4d2791ce4ebb0083f8fbeabdc49b22af923ffee 100644 (file)
--- a/backend/djvu/djvu-links.c
+++ b/backend/djvu/djvu-links.c
@@ -60,8 +60,8 @@ static gboolean number_from_string_10(const gchar *str, guint64 *number)
        }
 }
 
-static EvLinkDest *
-get_djvu_link_dest (const DjvuDocument *djvu_document, const gchar *link_name, int base_page)
+static guint64
+get_djvu_link_page (const DjvuDocument *djvu_document, const gchar *link_name, int base_page)
 {
        guint64 page_num = 0;
 
@@ -69,22 +69,28 @@ get_djvu_link_dest (const DjvuDocument *djvu_document, const gchar *link_name, i
        if (g_str_has_prefix (link_name, "#")) {
                if (base_page > 0 && g_str_has_prefix (link_name+1, "+")) {
                        if (number_from_string_10 (link_name + 2, &page_num)) {
-                               return ev_link_dest_new_page (base_page + page_num);
+                               return base_page + page_num;
                        }
                } else if (base_page > 0 && g_str_has_prefix (link_name+1, "-")) {
                        if (number_from_string_10 (link_name + 2, &page_num)) {
-                               return ev_link_dest_new_page (base_page - page_num);
+                               return base_page - page_num;
                        }
                } else {
                        if (number_from_string_10 (link_name + 1, &page_num)) {
-                               return ev_link_dest_new_page (page_num - 1);
+                               return page_num - 1;
                        }
                }
        } else {
                /* FIXME: component file identifiers */
        }
 
-       return NULL;
+       return page_num;
+}
+
+static EvLinkDest *
+get_djvu_link_dest (const DjvuDocument *djvu_document, const gchar *link_name, int base_page)
+{
+       return ev_link_dest_new_page (get_djvu_link_page (djvu_document, link_name, base_page));
 }
 
 static EvLinkAction *
@@ -409,6 +415,22 @@ djvu_links_find_link_dest (EvDocumentLinks  *document_links,
        return ev_dest;
 }
 
+gint
+djvu_links_find_link_page (EvDocumentLinks  *document_links,
+                          const gchar      *link_name)
+{
+       DjvuDocument *djvu_document = DJVU_DOCUMENT (document_links);
+       gint page;
+
+       page = get_djvu_link_page (djvu_document, link_name, -1);
+
+       if (page == -1) {
+               g_warning ("DjvuLibre error: unknown link destination %s", link_name);
+       }
+
+       return page;
+}
+
 GtkTreeModel *
 djvu_links_get_links_model (EvDocumentLinks *document_links)
 {