scratch – Rev 117
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// Accessibility tools
s.a11y = {
makeFocusable: function ($el) {
$el.attr('tabIndex', '0');
return $el;
},
addRole: function ($el, role) {
$el.attr('role', role);
return $el;
},
addLabel: function ($el, label) {
$el.attr('aria-label', label);
return $el;
},
disable: function ($el) {
$el.attr('aria-disabled', true);
return $el;
},
enable: function ($el) {
$el.attr('aria-disabled', false);
return $el;
},
onEnterKey: function (event) {
if (event.keyCode !== 13) return;
if ($(event.target).is(s.params.nextButton)) {
s.onClickNext(event);
if (s.isEnd) {
s.a11y.notify(s.params.lastSlideMessage);
}
else {
s.a11y.notify(s.params.nextSlideMessage);
}
}
else if ($(event.target).is(s.params.prevButton)) {
s.onClickPrev(event);
if (s.isBeginning) {
s.a11y.notify(s.params.firstSlideMessage);
}
else {
s.a11y.notify(s.params.prevSlideMessage);
}
}
if ($(event.target).is('.' + s.params.bulletClass)) {
$(event.target)[0].click();
}
},
liveRegion: $('<span class="' + s.params.notificationClass + '" aria-live="assertive" aria-atomic="true"></span>'),
notify: function (message) {
var notification = s.a11y.liveRegion;
if (notification.length === 0) return;
notification.html('');
notification.html(message);
},
init: function () {
// Setup accessibility
if (s.params.nextButton && s.nextButton && s.nextButton.length > 0) {
s.a11y.makeFocusable(s.nextButton);
s.a11y.addRole(s.nextButton, 'button');
s.a11y.addLabel(s.nextButton, s.params.nextSlideMessage);
}
if (s.params.prevButton && s.prevButton && s.prevButton.length > 0) {
s.a11y.makeFocusable(s.prevButton);
s.a11y.addRole(s.prevButton, 'button');
s.a11y.addLabel(s.prevButton, s.params.prevSlideMessage);
}
$(s.container).append(s.a11y.liveRegion);
},
initPagination: function () {
if (s.params.pagination && s.params.paginationClickable && s.bullets && s.bullets.length) {
s.bullets.each(function () {
var bullet = $(this);
s.a11y.makeFocusable(bullet);
s.a11y.addRole(bullet, 'button');
s.a11y.addLabel(bullet, s.params.paginationBulletMessage.replace(/{{index}}/, bullet.index() + 1));
});
}
},
destroy: function () {
if (s.a11y.liveRegion && s.a11y.liveRegion.length > 0) s.a11y.liveRegion.remove();
}
};