GSOC Sugar Labs - Week 15

2 minute read

This is the fifteenth post in the series of my weekly GSOC Sugar Labs, where I summarize my week of working with Sugar Labs under GSOC.

Weekly Journal

This week Samuel and I worked added the lightbox styled screenshot carousel. Completed the i18n by generating .pot files using flask-babel and started the testing. This week was less productive than other weeks.

Earlier versions of screenshots carousel occupied a big part of screen. This week we introduced lightbox styled screenshot carousel. Most of the classes and implementation were taken from here. I had to remove some modal css definitions from airspace.css since they were overriding the design and causing weird UI issues.

          /* Modified form of */

          #lightbox .modal-content {
            display: inline-block;
            text-align: center;

          a.thumbnail:hover {
            border-color: transparent;

          #lightbox .close {
            opacity: 1;
            color: rgb(255, 255, 255);
            background-color: rgb(25, 25, 25);
            padding: 5px 8px;
            border-radius: 30px;
            border: 2px solid rgb(255, 255, 255);
            position: absolute;
            top: -15px;
            right: -55px;

            z-index: 1032;

        <div id="lightbox" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
          <div class="modal-dialog">
            <button type="button" class="close hidden" data-dismiss="modal" aria-hidden="true">×</button>
            <div class="modal-content">
              <div class="modal-body">
                <img src="" alt="" />

          $(document).ready(function () {
            var $lightbox = $('#lightbox');

            $('[data-target="#lightbox"]').on('click', function (event) {
              var $img = $(this).find('img'),
                src = $img.attr('src'),
                alt = $img.attr('alt'),
                css = {
                  'maxWidth': $(window).width() - 100,
                  'maxHeight': $(window).height() - 100

              $lightbox.find('img').attr('src', src);
              $lightbox.find('img').attr('alt', alt);

            $lightbox.on('', function (e) {
              var $img = $lightbox.find('img');

                'width': $img.width()

Here is the end result

Screenshot Carousel

and when user clicks on the image, it will enlarge

Screenshot Carousel Zoom

i18n - Adding Pot Files

This was accomplished by using flask-babel’s _ or gettext function to substitute the template text with the language. To generate the .pot file, following command was used pybabel extract -F babel.cfg -o messages.pot . babel.cfg contains the patterns and files to look for _ or gettext function and adds it to .pot for translation.

Here is the configuration used for aslo-v3

[python: **.py]
[jinja2: **/templates/**.html]

Also a proposal to include aslo-v3 in the SugarLabs Translation Platform was sent to Chris Leonard (cjl) and he replied affirmatively :smile: and we may soon have new place for aslo-v3 translation.


Testing at the moment is not robust and not confidence worthy but I added some initial tests. For testing we are currently using pytest.

I added some unit testing code for i18n api module and some integration tests.

Here are the integration tests, they uses setup and teardown to allocate resources for running a class of tests and deleting the resources.

class TestSimple(object):

    def setup_class(cls):
        # Most hackish way to run the server
        subprocess.Popen(['./'], shell=True)
        # Allow grace of 5 seconds, server bootup time
        print("Setup. Starting the Server")

    def test_if_app_starts(self):
        app = init_app()

    def test_app_should_respond_ok_when_index_page_is_opened(self):
        res = requests.get("http://localhost:5000")
        assert res.status_code == 200

    def test_app_should_redirect_request_without_lang_preference(self):
        res = requests.get("http://localhost:5000", allow_redirects=False)
        # zpytest.
        assert res.status_code == 302 and (
            "localhost:5000/en/" in res.headers['Location'])

    def teardown_class(cls):
        os.system('killall honcho')
        print("Teardown. Stopping the server")

To run the tests I modified the .travis.yml to run the tests along with pep8 style check flake8 && pytest tests/

Goals for Next Week

This week I intend to focus on writing more sensible tests and writing documentation (maybe using sphinx). Database migration of aslo to aslo-v3 and moving the server to new VM is on the to-do list as well. since my old VM died (DigitalOcean credits expired :disappointed:). If you find any typos,mistakes or any other inconsistencies, let me know and I’ll fix them.