undomodule: disallow undoing "clear authorship colors"

Clearing the authorship colors of a document with at least two authors, and then
undoing that action caused a disconnect from the pad.
This change disallows undoing clearing authorship colors in order to prevent
the problem from affecting users, and adds the relative test coverage.

This is a change of behaviour, and is documented in the changelog.

Fixes #2802 (sidestepping it).
This commit is contained in:
John McLear 2020-04-07 00:39:43 +02:00 committed by muxator
parent ffc718e8c0
commit babf67175c
8 changed files with 90 additions and 4 deletions

View file

@ -292,6 +292,7 @@ function Ace2Inner(){
{
if ((typeof author) != "string")
{
top.console.error("Going to throw new error, potentially caused by: https://github.com/ether/etherpad-lite/issues/2802");
throw new Error("setAuthorInfo: author (" + author + ") is not a string");
}
if (!info)