add helper methods to deal with Calc UNO

This is the third part of the UI Test tutorial.

The code in uitest/libreoffice is generally useful UNO code that
allows to interact with LibreOffice. This code should be independent
of the UI testing framework and provide external developers a
helpful starting point to writer python extensions.

Change-Id: Ia1429577affd98dcf3f1aee3da3a7256499a1c78

uitest/libreoffice/calc/conditional_format.py

+# -*- Mode: python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+# this file provides methods to interact with the new conditional format API
+
+def get_conditional_format_from_sheet(sheet):
+    return sheet.getPropertyValue("ConditionalFormats")
+
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab: */

uitest/libreoffice/calc/document.py

+# -*- Mode: python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+def get_sheet_from_doc(document, index):
+    return document.getSheets().getByIndex(index)
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab: */