Rendering a large number of questions may be quite slow, so we want to
raise the limit.
We don’t call raise() in the loop because the quiz buffer captures this
function for a AJAX script, and we should only call raise if we expect
a corresponding output to the users browser. This helps to prevent
unexpected load balancer disconnects. See core_php_time_limit::raise()
for more details.
This commit is actually the joint work of Mahmoud Kassaei, Colin
Chambers and Tim Hunt from The Open University. We could only use one
persons name for the commit, and this time Colin gets the credit/blame.
The goal of this work was to increase usability, and also clean up
the page enough that it will be possible to add new features in future.
Display of mod/quiz/edit.php is now entirely generated by
mod_quiz\output\edit_renderer. This uses a helper class
mod_quiz\structure to provide details of the structure of the quiz, and
mod_quiz\repaginate to alter that structure. (Acutally, there are still
some modification methods on mod_quiz\structure. Expect that to be
cleaned up in future.)
The new code uses much more ajax, and there are new scripts
mod/quiz/edit_rest.php and mod/quiz/repaginate.php to handle this.
(Again, don't be surprised if those two scripts get merged in future.)
Also questionbank.ajax.php (which may, in future, be made more generic,
and moved into the core question bank code.)
Most of the new JavaScript code has intentionally copied the way things
are done when editing activities on the course page.
As a result of this, mod/quiz/editlib.php is now much shorter than it
was. (In future, expect the remaining code in here to move into
mod/quiz/classes.)
Allows plugins to add columns to the question bank view by extending core_question\bank\column_base
Columns to display are set in $CFG->questionbankcolumns. Columns are namespaced and autoloaded to support this.
