[evince] comics: Sort pages in natural order

[Felipe Borges <felipeborges src gnome org>]

commit 3cace5764f63278b1ee778a6a770fdeb18675960
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Oct 5 14:20:50 2016 +0200

    comics: Sort pages in natural order
    
    Use g_utf8_collate_key_for_filename to convert the page filenames
    into collation keys in order to compare using strcmp().
    
    This prevents pages named such as page1, page2, page10, to be
    sorted as page1, page10, page2...
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770695

 backend/comics/comics-document.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/backend/comics/comics-document.c b/backend/comics/comics-document.c
index 845f517..96ed26e 100644
--- a/backend/comics/comics-document.c
+++ b/backend/comics/comics-document.c
@@ -466,7 +466,18 @@ static int
 sort_page_names (gconstpointer a,
                  gconstpointer b)
 {
-  return strcmp (* (const char **) a, * (const char **) b);
+  gchar *temp1, *temp2;
+  gint ret;
+
+  temp1 = g_utf8_collate_key_for_filename (* (const char **) a, -1);
+  temp2 = g_utf8_collate_key_for_filename (* (const char **) b, -1);
+
+  ret = strcmp (temp1, temp2);
+
+  g_free (temp1);
+  g_free (temp2);
+
+  return ret;
 }
 
 static gboolean