Enhanced the extension

[dschreij]

I made some changes to the way that the exports for osweb are composed. I changed the usage of templates to a method of more directly manipulating the HTML DOM using BeautifulSoup, which I use to inject the parts that are dynamically generated by Python at the appropriate places in the HTML DOM.

The generation of a standalone bundle remains largely the same, but I reworked the JATOS zip generation such that all files remain separate entities in the zip file. This works perfectly, and I think it will make potential debugging of JATOS packages a lot easier.

Finally, I have improved the jatos.js file, such that data is saved after each call to the log function. I have however not succeeded in transferring the status of an experiment to JATOS: It always says FINISHED and does not convey when an experiment has been aborted when jatos.endStudy(false, "Some message why it failed") is called. According to the docs there is a function jatos.abortStudy(), but this will also erase all data collected up till that moment as well, which is not what we want (right?). A fresh attempt will be made tomorrow, but I thought you could already inspect what I did in the meantime.

[smathot]

Looks good! However, the standalone experiment breaks for me with Python 2.

Traceback (most recent call last):
  File "/home/sebastiaan/git/opensesame-extension-osweb/opensesame_extensions/oswebext/oswebext_widget.py", line 78, in _test
    export.standalone(osexp, html)
  File "/home/sebastiaan/git/opensesame-extension-osweb/osweb/export.py", line 42, in standalone
    _html(osexp, dst, mode, _js_files(mode), params, bundled=True)
  File "/home/sebastiaan/git/opensesame-extension-osweb/osweb/export.py", line 136, in _html
    fd.write(dom.prettify())
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa9' in position 160526: ordinal not in range(128)

[dschreij]

Aaah the ever present unicode/ascii conversion horror. It's fixed now, and all appears to work again in Python2 and 3. Because I was in the middle of something, the current state of this PR is a WIP :). I'll let you know here when it is in a 'finished' state again, after which you can merge the PR if you want

[dschreij]

The PR is now in a 'ready' state, so if you could review it again, and merge it if everything is ok, that would be great. I also updated the included osweb js files (now 1.0.3.) and added a logo image to realise a prettier click screen in osweb. I just realised though that this image is not included yet in the standalone export, so I still need to do that, but that should be a minimal effort (hopefully).

[dschreij]

Standalone version now works perfectly as well. I also added some CSS to make the canvas responsive to the screen size, and center it nicely on the display.

[smathot]

Excellent, thank you!