There was a big proliferation and reuse of $pdf variable
that was making the code hard to read/review. This commit
does change nothing but makes it more readable.
Also adds a couple of Close() calls, not strictly needed
because they don't have opened files. But think it makes
really clearer the scope of every variable. And, for sure
it frees some resources. That cannot be bad.
When a pdf object is instantiated and any file is loaded
with set_pdf() or load_pdf(), the files remain open until
the pdf is saved with pdf_save() or outputted with Output()..
In that cases is needed to perform an explicit Close() in
order to free resources, parsers and, ultimately, fclose()
the files.
Note that only the uses detected in the editpdf unit tests have
been fixed. I'd recommend to analyse every instance of the tcpdf
libs.
Also, there was one incorrecly reused pdf instance in then
generate_combined_pdf_for_attempt() method. Apparently it was not
leading to problems, but better use a separate instance (#246).
Get rid of the gc_collect_cycles() that only was
hiding incorrectly left open files. This must be fixed
in code when possible. And pdf libs allow us to do so.
Note that a lot of gc_collect_cycles() were added
in MDL-47675, I'd recommend to take a look to all them,
being replaced by fixes in code when possible.
Before this patch if an assignment has workflow and blind marking enabled if a teacher
sets a submission to have its grades released to students before they reveal student
identities the feedback they have given is not displayed to the student.
The patch causes the reveal_identities() method to pass the correct value to the
get_feedback_plugin_by_type() function in the assign class.
This test checks that that if reveal student identities is used before or after the submissions grades have
been set released that the teacher's feedback is displayed to students.
Chrome driver doesn't support clicking on
link which wrap on multiple lines. In this
case link is wrapped in navigation block
and was failing on chrome.
Removed requiremodintro setting from all core activity plugins and replace
with a single global setting.
Deprecated moodleform_mod::add_intro_editor and replaced with
moodleform_mod::standard_intro_elements
