[evince] comics: Return an error when archive contents are encrypted

[Bastien Nocera <hadess src gnome org>]

commit 29747f1e9a915973813886378dfe920ebee38a1b
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Jul 18 12:06:09 2017 +0200

    comics: Return an error when archive contents are encrypted
    
    Note that this will request a password and crash when it cannot pass that
    information to the EvDocument later. This needs to be fixed in the
    evince shell itself.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784963

 backend/comics/comics-document.c |   22 ++++++++++++++++++----
 1 files changed, 18 insertions(+), 4 deletions(-)
---
diff --git a/backend/comics/comics-document.c b/backend/comics/comics-document.c
index 611d752..4ead1dd 100644
--- a/backend/comics/comics-document.c
+++ b/backend/comics/comics-document.c
@@ -64,6 +64,7 @@ comics_document_list (ComicsDocument  *comics_document,
 {
        char **ret = NULL;
        GPtrArray *array;
+       gboolean has_encrypted_files;
 
        if (!ev_archive_open_filename (comics_document->archive, comics_document->archive_path, error)) {
                if (*error != NULL) {
@@ -78,6 +79,7 @@ comics_document_list (ComicsDocument  *comics_document,
                goto out;
        }
 
+       has_encrypted_files = FALSE;
        array = g_ptr_array_new ();
 
        while (1) {
@@ -100,6 +102,11 @@ comics_document_list (ComicsDocument  *comics_document,
                }
 
                name = ev_archive_get_entry_pathname (comics_document->archive);
+               if (ev_archive_get_entry_is_encrypted (comics_document->archive)) {
+                       g_debug ("Not adding encrypted file '%s' to the list of files in the comics", name);
+                       has_encrypted_files = TRUE;
+                       continue;
+               }
 
                g_debug ("Adding '%s' to the list of files in the comics", name);
                g_ptr_array_add (array, g_strdup (name));
@@ -107,10 +114,17 @@ comics_document_list (ComicsDocument  *comics_document,
 
        if (array->len == 0) {
                g_ptr_array_free (array, TRUE);
-               g_set_error_literal (error,
-                                    EV_DOCUMENT_ERROR,
-                                    EV_DOCUMENT_ERROR_INVALID,
-                                    _("No files in archive"));
+               if (has_encrypted_files) {
+                       g_set_error_literal (error,
+                                            EV_DOCUMENT_ERROR,
+                                            EV_DOCUMENT_ERROR_ENCRYPTED,
+                                            _("Archive is encrypted"));
+               } else {
+                       g_set_error_literal (error,
+                                            EV_DOCUMENT_ERROR,
+                                            EV_DOCUMENT_ERROR_INVALID,
+                                            _("No files in archive"));
+               }
        } else {
                g_ptr_array_add (array, NULL);
                ret = (char **) g_ptr_array_free (array, FALSE);