[evince] xps: Do not use EvDocument API in get_info implementation

[Carlos Garcia Campos <carlosgc src gnome org>]

commit bbd8111976d284f2635628db09f1ff49ff89c301
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Wed Oct 30 10:32:31 2013 +0100

    xps: Do not use EvDocument API in get_info implementation
    
    get_info might be called while the document is being loaded and the
    EvDocument cache is not filled yet. Use only the GXPS API to make
    sure we get valid values. This fixes the page size always reported as
    0x0 in the properties dialog.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=711093

 backend/xps/xps-document.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/backend/xps/xps-document.c b/backend/xps/xps-document.c
index 23f4737..b759098 100644
--- a/backend/xps/xps-document.c
+++ b/backend/xps/xps-document.c
@@ -171,16 +171,18 @@ xps_document_get_info (EvDocument *document)
                EV_DOCUMENT_INFO_PAPER_SIZE;
 
 
-       if (gxps_document_get_n_pages (xps->doc) > 0) {
-               ev_document_get_page_size (document, 0,
-                                          &(info->paper_width),
-                                          &(info->paper_height));
+        info->n_pages = gxps_document_get_n_pages (xps->doc);
+       if (info->n_pages > 0) {
+                GXPSPage *gxps_page;
+
+                gxps_page = gxps_document_get_page (xps->doc, 0, NULL);
+               gxps_page_get_size (gxps_page, &(info->paper_width), &(info->paper_height));
+                g_object_unref (gxps_page);
+
                info->paper_width  = info->paper_width / 96.0f * 25.4f;
                info->paper_height = info->paper_height / 96.0f * 25.4f;
        }
 
-       info->n_pages = gxps_document_get_n_pages (xps->doc);
-
        return info;
 }