If a quiz had a long job to calculate statstics running, this would
cause pages that may also attempt a recalculation (the statistics report
page or question bank) to load very slowly, and possibly result in a
database deadlock.
This change will firstly prevent the question bank page performing
analysis calculations at all, since these are not required for this
page, which will speed up loading and prevent deadlocks on this page.
Secondly, this adds a lock to the recalcuation process so that it cannot
run twice concurrently. This will present the user with a message to
indicate that it is waiting for a running calculation until it is
complete, and eventually it will timeout with a message and debugging.
The `contextid` argument of the `tiny_equation_filter` AJAX call is
hardcoded to 1, which causes trouble if the context table does not start
with id 1.
Signed-off-by: Gregor Eichelberger <gregor.eichelberger@tuwien.ac.at>
While, right now, sites using long (> 10 chars) $CFG->prefix
can continue working (because we still don't have any table
> 28 chars), as soon as some new table with long name is added,
it won't work with PostgreSQL anymore (if the 63 limit is raised).
Hence, this environmental check will verify on both install and
upgrade that the $CFG->prefix is always <= 10 chars.
Sites with longer prefixes will need to rename all their tables
(and maybe other objects, depending on the dbtype) to use a shorter
prefix.
TinyMCE has a default entity_encoding 'named',
which causes text with diacritic symbols to be converted to HTML entities,
e.g. pâté will be convert to pâté
That will be a problem with the Glossary auto-linking filter if a course has a text concept like pâté,
then the filter will likely fail to get the text concept.
Changing the TinyMCE entity_encoding to 'raw' will resolve the problem.
When the user picture is being rendered as a link but the user's full
name is not being included in the link and the alt text turns out to be
empty, we could end up with a link without a discernible text. This is
an accessibility issue that will affect screen reader users. If this is
the case, use the full name as the user picture's alt text.
Since custom menu items were merged into the primary navigation/more
menu as part of 56c34d71 and related work, the "title" attribute of
each custom menu item was lost.
