[libgdata] demos: Add event pagination support to calendar-cli demo

[Philip Withnall <pwithnall src gnome org>]

commit 399d8d40af5546f0eff6416d3573934a251ce233
Author: Philip Withnall <withnall endlessm com>
Date:   Fri Feb 3 16:33:55 2017 +0000

    demos: Add event pagination support to calendar-cli demo
    
    Otherwise it will only show the first few entries from a calendar.

 demos/calendar/calendar-cli.c |   58 ++++++++++++++++++++++++++---------------
 1 files changed, 37 insertions(+), 21 deletions(-)
---
diff --git a/demos/calendar/calendar-cli.c b/demos/calendar/calendar-cli.c
index 25a060b..a1d84f6 100644
--- a/demos/calendar/calendar-cli.c
+++ b/demos/calendar/calendar-cli.c
@@ -319,12 +319,11 @@ command_events (int argc, char *argv[])
        GDataCalendarService *service = NULL;
        GDataCalendarCalendar *calendar = NULL;
        GDataCalendarQuery *query = NULL;
-       GDataFeed *feed = NULL;
-       GList/*<unowned GDataCalendarEvent>*/ *entries;
        GError *error = NULL;
        gint retval = 0;
        const gchar *query_string, *calendar_id;
        GDataAuthorizer *authorizer = NULL;
+       guint n_results;
 
        if (argc < 3) {
                return print_usage (argv);
@@ -351,33 +350,50 @@ command_events (int argc, char *argv[])
 
        service = gdata_calendar_service_new (authorizer);
        query = gdata_calendar_query_new (query_string);
+       gdata_query_set_max_results (GDATA_QUERY (query), 10);
        calendar = gdata_calendar_calendar_new (calendar_id);
-       feed = gdata_calendar_service_query_events (service, calendar,
-                                                   GDATA_QUERY (query), NULL,
-                                                   NULL, NULL, &error);
+       n_results = 0;
+
+       while (TRUE) {
+               GList/*<unowned GDataCalendarEvent>*/ *entries, *l;
+               GDataFeed *feed = NULL;
+
+               feed = gdata_calendar_service_query_events (service, calendar,
+                                                           GDATA_QUERY (query), NULL,
+                                                           NULL, NULL, &error);
+
+               if (error != NULL) {
+                       g_printerr ("%s: Error querying events: %s\n",
+                                   argv[0], error->message);
+                       g_error_free (error);
+                       retval = 1;
+                       goto done;
+               }
 
-       if (error != NULL) {
-               g_printerr ("%s: Error querying events: %s\n",
-                           argv[0], error->message);
-               g_error_free (error);
-               retval = 1;
-               goto done;
-       }
+               /* Print results. */
+               entries = gdata_feed_get_entries (feed);
 
-       /* Print results. */
-       for (entries = gdata_feed_get_entries (feed); entries != NULL;
-            entries = entries->next) {
-               GDataCalendarEvent *event;
+               if (entries == NULL) {
+                       retval = 0;
+                       g_object_unref (feed);
+                       goto done;
+               }
 
-               event = GDATA_CALENDAR_EVENT (entries->data);
-               print_event (event);
+               for (l = entries; l != NULL; l = l->next) {
+                       GDataCalendarEvent *event;
+
+                       event = GDATA_CALENDAR_EVENT (l->data);
+                       print_event (event);
+                       n_results++;
+               }
+
+               gdata_query_next_page (GDATA_QUERY (query));
+               g_object_unref (feed);
        }
 
-       g_print ("Total of %u results.\n",
-                g_list_length (gdata_feed_get_entries (feed)));
+       g_print ("Total of %u results.\n", n_results);
 
 done:
-       g_clear_object (&feed);
        g_clear_object (&query);
        g_clear_object (&authorizer);
        g_clear_object (&calendar);