186cc9f16c
Removed tabindex="-1" from main element to fix accessibility issue Description Removed tabindex="-1" from main We had a strange issue where TalkBack wasn’t reading content in some xBlocks but was reading some others. I figured out that if you remove tabindex=-1 from <main>, TalkBack works as expected again. Tangentially, this breaks the old method of implementing SkipNav links. Further tangentially, the SkipNav links were already broken (or in this case redundant on mobile). @wittjeff will file two separate issues after this one PR is merged — one for a better way to implement SkipNav links for Learning MFE, and one for a better / functional way to implement SkipNav links for Mobile. How to reproduce Go to [this unit](https://courses.edx.org/xblock/block-v1:W3Cx+WAI0.1x+3T2019+type@html+block@2eb3c86c479f44ba964f88ff0bfd9211) on mobile and turn on TalkBack. It will skip main content. For further information on testing go to [Jira Ticket](https://openedx.atlassian.net/browse/LEARNER-7858)
172 lines
5.7 KiB
HTML
172 lines
5.7 KiB
HTML
<%page expression_filter="h"/>
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<%inherit file="/main.html" />
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<%namespace name='static' file='/static_content.html'/>
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<%!
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from django.utils.translation import ugettext as _
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from openedx.core.djangolib.markup import HTML
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from openedx.core.djangolib.js_utils import js_escaped_string
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%>
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<%def name="course_name()">
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<% return _("{course_number} Courseware").format(course_number=course.display_number_with_default) %>
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</%def>
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<%block name="bodyclass">view-in-course view-courseware courseware ${course.css_class or ''}</%block>
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<%block name="title"><title>
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% if section_title:
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${static.get_page_title_breadcrumbs(section_title, course_name())}
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% else:
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${static.get_page_title_breadcrumbs(course_name())}
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%endif
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</title></%block>
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<%block name="header_extras">
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% for template_name in ["image-modal"]:
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<script type="text/template" id="${template_name}-tpl">
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<%static:include path="common/templates/${template_name}.underscore" />
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</script>
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% endfor
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<%
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header_file = None
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%>
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</%block>
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<%block name="headextra">
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<%static:css group='style-course-vendor'/>
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<%static:css group='style-course'/>
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## Utility: Notes
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% if edx_notes_enabled:
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<%static:css group='style-student-notes'/>
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% endif
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<script type="text/javascript" src="${static.url('js/jquery.autocomplete.js')}" async></script>
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<script type="text/javascript" src="${static.url('js/src/tooltip_manager.js')}" async></script>
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<link href="${static.url('css/vendor/jquery.autocomplete.css')}" rel="preload" type="text/css">
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${HTML(fragment.head_html())}
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% if is_learning_mfe:
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## If this chromeless view is in an iframe in the learning microfrontend app
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## then add a base tag in the head (of the iframe document) to force links
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## in this iframe to navigate the parent window.
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<base target="_parent">
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%endif
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## Expose the $$course_id variable for course-team-authored JS.
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## We assign it in the <head> so that it will definitely be
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## assigned before any in-XBlock JS is run.
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<script type="text/javascript">
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var $$course_id = "${course.id | n, js_escaped_string}";
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</script>
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</%block>
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<%block name="js_extra">
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<script type="text/javascript" src="${static.url('common/js/vendor/jquery.scrollTo.js')}" async></script>
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<script type="text/javascript" src="${static.url('js/vendor/flot/jquery.flot.js')}" async></script>
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<%static:js group='courseware'/>
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% if enable_mathjax:
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<%include file="/mathjax_include.html" args="disable_fast_preview=True"/>
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% endif
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% if staff_access:
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<%include file="xqa_interface.html"/>
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% endif
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${HTML(fragment.foot_html())}
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</%block>
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<div class="course-wrapper chromeless">
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<section class="course-content" id="course-content"\
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% if enable_completion_on_view_service:
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data-enable-completion-on-view-service="true" \
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% else:
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data-enable-completion-on-view-service="false" \
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% endif
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style="display: block; width: auto; margin: 0;"
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>
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<main id="main" aria-label="Content">
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${HTML(fragment.body_html())}
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</main>
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</section>
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</div>
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% if not is_learning_mfe:
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% if course.show_calculator or edx_notes_enabled:
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<nav class="nav-utilities ${"has-utility-calculator" if course.show_calculator else ""}" aria-label="${_('Course Utilities')}">
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## Utility: Notes
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% if edx_notes_enabled:
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<%include file="/edxnotes/toggle_notes.html" args="course=course"/>
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% endif
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## Utility: Calc
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% if course.show_calculator:
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<%include file="/calculator/toggle_calculator.html" />
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% endif
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</nav>
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% endif
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% else:
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% if edx_notes_enabled:
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<%include file="/edxnotes/toggle_notes.html" args="course=course"/>
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% endif
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% endif
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% if is_learning_mfe:
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<script type="text/javascript">
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(function() {
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// If this view is rendered in an iframe within the learning microfrontend app
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// it will report the height of its contents to the parent window when the
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// document loads, window resizes, or DOM mutates.
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if (window !== window.parent) {
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document.body.className += ' view-in-mfe';
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var lastHeight = window.offsetHeight;
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var lastWidth = window.offsetWidth;
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var contentElement = document.getElementById('content');
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function dispatchResizeMessage(event) {
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// Note: event is actually an Array of MutationRecord objects
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// when fired from the MutationObserver
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var eventType = event.type || 'mutate';
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var newHeight = contentElement.offsetHeight;
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var newWidth = contentElement.offsetWidth;
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if (eventType !== 'load' && newWidth === lastWidth && newHeight === lastHeight) {
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return;
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}
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window.parent.postMessage({
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type: 'plugin.resize',
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payload: {
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width: newWidth,
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height: newHeight,
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}
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}, document.referrer
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);
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lastHeight = newHeight;
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lastWidth = newWidth;
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// Within the learning microfrontend the iframe resizes to match the
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// height of this document and it should never scroll. It does scroll
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// ocassionally when javascript is used to focus elements on the page
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// before the parent iframe has been resized to match the content
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// height. This window.scrollTo is an attempt to keep the content at the
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// top of the page. See TNL-7094
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window.scrollTo(0, 0);
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}
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// Create an observer instance linked to the callback function
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const observer = new MutationObserver(dispatchResizeMessage);
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// Start observing the target node for configured mutations
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observer.observe(document.body, { attributes: true, childList: true, subtree: true });
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window.addEventListener('load', dispatchResizeMessage);
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window.addEventListener('resize', dispatchResizeMessage);
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}
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}());
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</script>
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% endif
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