PDF.js does not have the presentation mode option in Firefox and IE

[Kristina Hoeppner]

https://mahara.org/interaction/forum/topic.php?id=8303

When you embed a PDF into a page, the presentation mode option is only available in Chrome and Opera but not in Firefox and IE though according to the PDF.js website demo https://mozilla.github.io/pdf.js/ Firefox should be able to use the presentation mode.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/9620

[Lisa Seeto (lisaseeto)]

Looks like it was missing an attribute to allow full screen mode display in the iframe.
I've added it in now.

https://www.w3.org/TR/html5/embedded-content-0.html#the-iframe-element

[Steven (stevens-q)]

Environment tested: Master
Browser tested: Chrome, Firefox and IE 11

PRECONDITIONS:
------------------------
1) PDF file exists
2) User exists and has a Portfilio page (site admin)
2) Portfolio page exists and has a PDF block
3) Browsers to test with - Chrome, Firefox and IE 11

TEST STEPS:
------------------------
1) Log in as Site admin
2) Browse to the Portfolio page with a PDF block
3) Click the Presentation mode link in the PDF viewer on the page
4) Verify that the PDF is now displayed as full screen and clicking Esc on keyboard will return screen to normal page ✔
5) Verify the above step works for the following browsers ✔
   a) Chrome ✔
   b) Firefox ✔
   c) Internet Explorer v. 11 ✔

Catalyst QA Approved ✔

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/9620
Committed: https://git.mahara.org/mahara/mahara/commit/97ad9af73a417315069596a679bdde3926f312a6
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 97ad9af73a417315069596a679bdde3926f312a6
Author: Lisa Seeto <email address hidden>
Date: Tue Mar 12 15:59:52 2019 +1300

Bug 1778792: PDF.js does not have the presentation mode option in Firefox and IE

Added allowfullscreen attr to iframe for pdf

behatnotneeded

Change-Id: If21c2766225d5b7d86d2ebc019fefa039e787d3d
Signed-off-by: Lisa Seeto <email address hidden>