A placeholder always needs to be exported even if the content is hidden since it could be visible on another slide and master page layers should be cached on the client. In order to support text fields different from the default ones a hash is used for linking text field placeholder and text field content in place of the text field type. Any text field content should be sent first, so that when the client try to draw a master page layer corresponding to a text field placeholder the content is already available. Slideshow unit tests have been updated to match the new implementation. Includes: Author: Marco Cecchetti <marco.cecchetti@collabora.com> AuthorDate: Tue Mar 11 18:46:13 2025 +0100 AnnotationTest: UniqueID regression By when incrementing the static counter used by UniqueID has been moved from getID() method to ctor, it's wrong to expect that created annotations have consecutive ids. Change-Id: I845888d141e0f02c2066a9cb17d89ab152bf28b8 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/183201 Tested-by: Jenkins Reviewed-by: Miklos Vajna <vmiklos@collabora.com>