[libgdata/wip/rishi/drive: 2/2] documents: Add support for paging through Drive v2 file lists

[Debarshi Ray <debarshir src gnome org>]

commit bff6a2a7e44beb5371bde3a691f3005a964c645f
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Apr 23 14:47:30 2015 +0200

    documents: Add support for paging through Drive v2 file lists
    
    The server does not offer a ‘previous’ URI.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=684920

 gdata/services/documents/gdata-documents-feed.c  |   17 +++++++++++++++--
 gdata/services/documents/gdata-documents-query.c |    8 ++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)
---
diff --git a/gdata/services/documents/gdata-documents-feed.c b/gdata/services/documents/gdata-documents-feed.c
index 92b461e..2f7324e 100644
--- a/gdata/services/documents/gdata-documents-feed.c
+++ b/gdata/services/documents/gdata-documents-feed.c
@@ -123,10 +123,23 @@ get_kind_and_mime_type (JsonReader *reader, gchar **out_kind, gchar **out_mime_t
 static gboolean
 parse_json (GDataParsable *parsable, JsonReader *reader, gpointer user_data, GError **error)
 {
+       gboolean success = TRUE;
+       gchar *next_uri = NULL;
+
        /* JSON format: https://developers.google.com/drive/v2/reference/files/list */
 
-       if (g_strcmp0 (json_reader_get_member_name (reader), "items") == 0) {
-               gboolean success = TRUE;
+       if (gdata_parser_string_from_json_member (reader, "nextLink", P_DEFAULT, &next_uri, &success, error) 
== TRUE) {
+               if (success && next_uri != NULL && next_uri[0] != '\0') {
+                       GDataLink *_link;
+
+                       _link = gdata_link_new (next_uri, "http://www.iana.org/assignments/relation/next";);
+                       _gdata_feed_add_link (GDATA_FEED (parsable), _link);
+                       g_object_unref (_link);
+               }
+
+               g_free (next_uri);
+               return success;
+       } else if (g_strcmp0 (json_reader_get_member_name (reader), "items") == 0) {
                guint i, elements;
 
                if (json_reader_is_array (reader) == FALSE) {
diff --git a/gdata/services/documents/gdata-documents-query.c 
b/gdata/services/documents/gdata-documents-query.c
index 76f4dd2..d91084c 100644
--- a/gdata/services/documents/gdata-documents-query.c
+++ b/gdata/services/documents/gdata-documents-query.c
@@ -298,6 +298,7 @@ static void
 get_query_uri (GDataQuery *self, const gchar *feed_uri, GString *query_uri, gboolean *params_started)
 {
        GDataDocumentsQueryPrivate *priv = GDATA_DOCUMENTS_QUERY (self)->priv;
+       guint max_results;
 
        #define APPEND_SEP g_string_append_c (query_uri, (*params_started == FALSE) ? '?' : '&'); 
*params_started = TRUE;
 
@@ -353,6 +354,13 @@ get_query_uri (GDataQuery *self, const gchar *feed_uri, GString *query_uri, gboo
                g_string_append (query_uri, "&showfolders=true");
        else
                g_string_append (query_uri, "&showfolders=false");
+
+       max_results = gdata_query_get_max_results (self);
+       if (max_results > 0) {
+               APPEND_SEP
+               max_results = max_results > 1000 ? 1000 : max_results;
+               g_string_append_printf (query_uri, "maxResults=%u", max_results);
+       }
 }
 
 /**