[evolution-data-server] Bug 775699 - Only latest 100 tasks downloaded from the Google

[Milan Crha <mcrha src gnome org>]

commit f87e020be895923b1f649841b4a880c08291419c
Author: Milan Crha <mcrha redhat com>
Date:   Thu Dec 8 17:23:38 2016 +0100

    Bug 775699 - Only latest 100 tasks downloaded from the Google

 CMakeLists.txt                                     |   16 +++++++++++++++
 config.h.in                                        |    5 +++-
 .../backends/gtasks/e-cal-backend-gtasks.c         |   21 ++++++++++++++++++-
 3 files changed, 39 insertions(+), 3 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a6abef6..76ae7f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -776,6 +776,22 @@ add_printable_option(ENABLE_GOOGLE "Enable Google support" ON)
 if(ENABLE_GOOGLE)
        pkg_check_modules_for_option(ENABLE_GOOGLE "Google" LIBGDATA libgdata>=${libgdata_minimum_version})
        set(HAVE_LIBGDATA ON)
+
+       set(CMAKE_REQUIRED_DEFINITIONS ${LIBGDATA_CFLAGS_OTHER})
+       set(CMAKE_REQUIRED_INCLUDES ${LIBGDATA_INCLUDE_DIRS})
+       set(CMAKE_REQUIRED_LIBRARIES ${LIBGDATA_LDFLAGS})
+
+       CHECK_C_SOURCE_COMPILES("#include <gdata/gdata.h>
+                               int main(void) {
+                                       const gchar *next_page_token;
+                                       next_page_token = gdata_feed_get_next_page_token (NULL);
+                                       gdata_tasks_query_set_page_token (NULL, next_page_token);
+                                       return 0;
+                               }" HAVE_LIBGDATA_TASKS_PAGINATION_FUNCTIONS)
+
+       unset(CMAKE_REQUIRED_DEFINITIONS)
+       unset(CMAKE_REQUIRED_INCLUDES)
+       unset(CMAKE_REQUIRED_LIBRARIES)
 endif(ENABLE_GOOGLE)
 
 # ******************************
diff --git a/config.h.in b/config.h.in
index 549804f..ba1c33e 100644
--- a/config.h.in
+++ b/config.h.in
@@ -177,9 +177,12 @@
 /* libical provides icaltzutil_set_exact_vtimezones_support function */
 #cmakedefine HAVE_ICALTZUTIL_SET_EXACT_VTIMEZONES_SUPPORT 1
 
-/* Define to 1 if you have the libgdata package. */
+/* Define to 1 if you have the libgdata package */
 #cmakedefine HAVE_LIBGDATA 1
 
+/* Define to 1 when the libgdata provides GTasks pagination functions */
+#cmakedefine HAVE_LIBGDATA_TASKS_PAGINATION_FUNCTIONS 1
+
 /* Define to 1 when have O_LARGEFILE open flag */
 #cmakedefine HAVE_O_LARGEFILE 1
 
diff --git a/src/calendar/backends/gtasks/e-cal-backend-gtasks.c 
b/src/calendar/backends/gtasks/e-cal-backend-gtasks.c
index 2a3f35f..8adc520 100644
--- a/src/calendar/backends/gtasks/e-cal-backend-gtasks.c
+++ b/src/calendar/backends/gtasks/e-cal-backend-gtasks.c
@@ -445,8 +445,7 @@ ecb_gtasks_update_thread (gpointer user_data)
        cancellable = ecb_gtasks_ref_cancellable (gtasks);
 
        tasks_query = gdata_tasks_query_new (NULL);
-       gdata_query_set_start_index (GDATA_QUERY (tasks_query), 0);
-       gdata_query_set_max_results (GDATA_QUERY (tasks_query), G_MAXINT);
+       gdata_query_set_max_results (GDATA_QUERY (tasks_query), 100);
        gdata_tasks_query_set_show_completed (tasks_query, TRUE);
        gdata_tasks_query_set_show_hidden (tasks_query, TRUE);
 
@@ -461,7 +460,12 @@ ecb_gtasks_update_thread (gpointer user_data)
        if (!local_error)
                e_backend_ensure_source_status_connected (E_BACKEND (gtasks));
 
+#ifdef HAVE_LIBGDATA_TASKS_PAGINATION_FUNCTIONS
+       while (feed && !g_cancellable_is_cancelled (cancellable) && !local_error) {
+               const gchar *next_page_token;
+#else
        if (feed) {
+#endif
                GList *link;
                const gchar *uid;
 
@@ -532,6 +536,19 @@ ecb_gtasks_update_thread (gpointer user_data)
                e_cal_backend_store_thaw_changes (gtasks->priv->store);
 
                PROPERTY_UNLOCK (gtasks);
+
+#ifdef HAVE_LIBGDATA_TASKS_PAGINATION_FUNCTIONS
+               next_page_token = gdata_feed_get_next_page_token (feed);
+               if (!next_page_token || !*next_page_token)
+                       break;
+
+               gdata_tasks_query_set_page_token (tasks_query, next_page_token);
+
+               g_clear_object (&feed);
+
+               feed = gdata_tasks_service_query_tasks (gtasks->priv->service, gtasks->priv->tasklist,
+                       GDATA_QUERY (tasks_query), cancellable, NULL, NULL, &local_error);
+#endif
        }
 
        g_clear_object (&tasks_query);