[evolution-data-server/cursor-staging: 11/30] EBookBackend: Adding cursor related APIs

[Tristan Van Berkom <tvb src gnome org>]

commit 3e6c8aca9d4ca31a8ceec6c76fd533f69f390575
Author: Tristan Van Berkom <tristanvb openismus com>
Date:   Fri May 17 20:03:45 2013 +0900

    EBookBackend: Adding cursor related APIs
    
    Added new ->set_locale() API and ->get_locale() API
    
    Use these to dynamically set the locale of a running addressbook, and also
    to fetch the currently configured locale of an addressbook at startup time
    
    Also added new methods for creating and deleting cursors.

 addressbook/libedata-book/e-book-backend.c |  137 ++++++++++++++++++++++++++++
 addressbook/libedata-book/e-book-backend.h |   30 ++++++-
 2 files changed, 166 insertions(+), 1 deletions(-)
---
diff --git a/addressbook/libedata-book/e-book-backend.c b/addressbook/libedata-book/e-book-backend.c
index 217a542..8b05413 100644
--- a/addressbook/libedata-book/e-book-backend.c
+++ b/addressbook/libedata-book/e-book-backend.c
@@ -3112,6 +3112,56 @@ e_book_backend_sync (EBookBackend *backend)
 }
 
 /**
+ * e_book_backend_set_locale:
+ * @backend: an #EBookbackend
+ * @locale: the new locale for the addressbook
+ *
+ * Notify the addressbook backend that the current locale has
+ * changed, this is important for backends which support
+ * ordered result lists which are locale sensitive.
+ *
+ * Since: 3.12
+ */
+void
+e_book_backend_set_locale (EBookBackend *backend,
+                          const gchar  *locale)
+{
+       g_return_if_fail (E_IS_BOOK_BACKEND (backend));
+
+       g_object_ref (backend);
+
+       if (E_BOOK_BACKEND_GET_CLASS (backend)->set_locale)
+               (* E_BOOK_BACKEND_GET_CLASS (backend)->set_locale) (backend, locale);
+
+       g_object_unref (backend);
+}
+
+/**
+ * e_book_backend_dup_locale:
+ * @backend: an #EBookbackend
+ *
+ * Fetches a copy of the currently configured locale for the addressbook
+ *
+ * Since: 3.12
+ */
+gchar *
+e_book_backend_dup_locale (EBookBackend *backend)
+{
+       gchar *locale = NULL;
+
+       g_return_val_if_fail (E_IS_BOOK_BACKEND (backend), NULL);
+
+       g_object_ref (backend);
+
+       if (E_BOOK_BACKEND_GET_CLASS (backend)->dup_locale)
+               locale = (* E_BOOK_BACKEND_GET_CLASS (backend)->dup_locale) (backend);
+
+       g_object_unref (backend);
+
+       return locale;
+}
+
+/**
  * e_book_backend_notify_update:
  * @backend: an #EBookBackend
  * @contact: a new or modified contact
@@ -3299,3 +3349,90 @@ e_book_backend_prepare_for_completion (EBookBackend *backend,
        return simple;
 }
 
+/**
+ * e_book_backend_create_cursor:
+ * @backend: an #EBookBackend
+ * @sort_fields: the #EContactFields to sort by
+ * @sort_types: the #EBookCursorSortTypes for the sorted fields
+ * @n_fields: the number of fields in the @sort_fields and @sort_types
+ * @error: return location for a #GError, or %NULL
+ *
+ * Creates a new #EDataBookCursor for the given backend if the backend
+ * has cursor support. If the backend does not support cursors then
+ * an %E_CLIENT_ERROR_NOT_SUPPORTED error will be set in @error.
+ *
+ * Backends can also refuse to create cursors for some values of @sort_fields
+ * and report more specific errors.
+ *
+ * The returned cursor belongs to @backend and should be destroyed
+ * with e_book_backend_delete_cursor() when no longer needed.
+ *
+ * Returns: (transfer none): A newly created cursor, the cursor belongs
+ * to the backend and should not be unreffed, or %NULL
+ *
+ * Since: 3.12
+ */
+EDataBookCursor *
+e_book_backend_create_cursor (EBookBackend *backend,
+                             EContactField *sort_fields,
+                             EBookCursorSortType *sort_types,
+                             guint n_fields,
+                             GError **error)
+{
+       EDataBookCursor *cursor = NULL;
+
+       g_return_val_if_fail (E_IS_BOOK_BACKEND (backend), NULL);
+
+       g_object_ref (backend);
+
+       if (E_BOOK_BACKEND_GET_CLASS (backend)->create_cursor)
+               cursor = (* E_BOOK_BACKEND_GET_CLASS (backend)->create_cursor) (backend,
+                                                                               sort_fields,
+                                                                               sort_types,
+                                                                               n_fields,
+                                                                               error);
+       else
+               g_set_error (error,
+                            E_CLIENT_ERROR,
+                            E_CLIENT_ERROR_NOT_SUPPORTED,
+                            "Addressbook backend does not support cursors");
+
+       g_object_unref (backend);
+
+       return cursor;
+}
+
+/**
+ * e_book_backend_delete_cursor:
+ * @backend: an #EBookBackend
+ * @cursor: the #EDataBookCursor to destroy
+ * @error: return location for a #GError, or %NULL
+ *
+ * Requests @backend to release and destroy @cursor, this
+ * will trigger an %E_CLIENT_ERROR_INVALID_ARG error if @cursor
+ * is not owned by @backend.
+ *
+ * Returns: Whether @cursor was successfully deleted.
+ *
+ * Since: 3.12
+ */
+gboolean
+e_book_backend_delete_cursor (EBookBackend *backend,
+                             EDataBookCursor *cursor,
+                             GError **error)
+{
+       gboolean success = FALSE;
+
+       g_return_val_if_fail (E_IS_BOOK_BACKEND (backend), FALSE);
+
+       g_object_ref (backend);
+
+       if (E_BOOK_BACKEND_GET_CLASS (backend)->delete_cursor)
+               success = (* E_BOOK_BACKEND_GET_CLASS (backend)->delete_cursor) (backend, cursor, error);
+       else
+               g_warning ("Backend asked to delete a cursor, but does not support cursors");
+
+       g_object_unref (backend);
+
+       return success;
+}
diff --git a/addressbook/libedata-book/e-book-backend.h b/addressbook/libedata-book/e-book-backend.h
index 7b5d845..e45ec6b 100644
--- a/addressbook/libedata-book/e-book-backend.h
+++ b/addressbook/libedata-book/e-book-backend.h
@@ -33,8 +33,9 @@
 #include <libebackend/libebackend.h>
 
 #include <libedata-book/e-data-book.h>
-#include <libedata-book/e-data-book-view.h>
+#include <libedata-book/e-data-book-cursor.h>
 #include <libedata-book/e-data-book-direct.h>
+#include <libedata-book/e-data-book-view.h>
 
 /* Standard GObject macros */
 #define E_TYPE_BOOK_BACKEND \
@@ -217,6 +218,19 @@ struct _EBookBackendClass {
 
        void            (*sync)                 (EBookBackend *backend);
 
+       void            (*set_locale)           (EBookBackend *backend,
+                                                const gchar  *locale);
+       gchar          *(*dup_locale)           (EBookBackend *backend);
+       EDataBookCursor *
+                       (*create_cursor)        (EBookBackend *backend,
+                                                EContactField *sort_fields,
+                                                EBookCursorSortType *sort_types,
+                                                guint n_fields,
+                                                GError **error);
+       gboolean        (* delete_cursor)       (EBookBackend *backend,
+                                                EDataBookCursor *cursor,
+                                                GError **error);
+
        /* Signals */
        void            (*closed)               (EBookBackend *backend,
                                                 const gchar *sender);
@@ -385,6 +399,20 @@ void               e_book_backend_configure_direct (EBookBackend *backend,
 
 void           e_book_backend_sync             (EBookBackend *backend);
 
+void            e_book_backend_set_locale       (EBookBackend *backend,
+                                                const gchar  *locale);
+gchar          *e_book_backend_dup_locale       (EBookBackend *backend);
+
+EDataBookCursor *
+                e_book_backend_create_cursor    (EBookBackend *backend,
+                                                EContactField *sort_fields,
+                                                EBookCursorSortType *sort_types,
+                                                guint n_fields,
+                                                GError **error);
+gboolean        e_book_backend_delete_cursor    (EBookBackend *backend,
+                                                EDataBookCursor *cursor,
+                                                GError **error);
+
 GSimpleAsyncResult *
                e_book_backend_prepare_for_completion
                                                (EBookBackend *backend,