%PDF-
%PDF-
Mini Shell
Mini Shell
/**
* Accordion module
*
* @param {jQuery} $
*/
H5P.Accordion = (function ($) {
var nextIdPrefix = 0;
var nextLooperId = 0;
var allowedLoopers = [];
/**
* Initialize a new Accordion
*
* @class H5P.InteractiveVideo
* @extends H5P.EventDispatcher
* @param {Object} params Behavior settings
* @param {Number} contentId Content identification
* @param {Object} contentData Object containing task specific content data
*/
function Accordion(params, contentId, contentData) {
this.contentId = contentId;
H5P.EventDispatcher.call(this);
// Set default behavior.
this.params = $.extend({}, {
hTag: "h2",
panels: []
}, params);
this.contentData = contentData;
this.instances = [];
for (var i = 0; i < this.params.panels.length; i++) {
this.instances[i] = H5P.newRunnable(this.params.panels[i].content, contentId);
}
this.idPrefix = (nextIdPrefix++) + '-';
}
Accordion.prototype = Object.create(H5P.EventDispatcher.prototype);
Accordion.prototype.constructor = Accordion;
/**
* Append field to wrapper.
* @param {jQuery} container the jQuery object which this module will attach itself to.
*/
Accordion.prototype.attach = function ($container) {
var self = this;
if (self.$content === undefined) {
// Mark as consumed
self.triggerConsumed();
// Create the content
self.elements = [];
for (var i = 0; i < self.params.panels.length; i++) {
self.createPanel(i);
}
self.$content = $(self.elements);
}
// Insert content
$container.html('').addClass('h5p-accordion').append(self.$content);
};
/**
* Create HTML for Panel.
* @param {number} id
*/
Accordion.prototype.createPanel = function (id) {
var self = this;
var titleId = 'h5p-panel-link-' + this.idPrefix + id;
var contentId = 'h5p-panel-content-' + self.idPrefix + id;
var toggleCollapse = function () {
if (self.$expandedTitle === undefined || !self.$expandedTitle.is($title)) {
self.collapseExpandedPanels();
self.expandPanel($title, $titleButton, $content);
}
else {
self.collapsePanel($title, $titleButton, $content);
}
// We're running in an iframe, so we must animate the iframe height
self.animateResize();
};
// Create panel title
var $title = $('<' + this.params.hTag + '/>', {
'id': titleId,
'class': 'h5p-panel-title',
});
// Create panel button
var $titleButton = $('<button/>', {
'class': 'h5p-panel-button',
'tabindex': '0',
'aria-expanded': 'false',
'aria-controls': contentId,
'html': self.params.panels[id].title,
'on': {
'click': toggleCollapse,
'keydown': function (event) {
switch (event.keyCode) {
case 38: // Up
case 37: { // Left
// Try to select previous item
var $prev = $title.prev().prev().children('.h5p-panel-button');
if ($prev.length) {
$prev.focus();
}
return false;
}
case 40: // Down
case 39: { // Right
// Try to select next item
var $next = $content.next().children('.h5p-panel-button');
if ($next.length) {
$next.focus();
}
return false;
}
case 32: // SPACE
case 13: { // ENTER
toggleCollapse();
return false;
}
}
},
// The class needs to be set programmatically as the title
// is not able to detect focus-visible on the button
'focus': function () {
if($titleButton.is(':focus-visible')) {
$title.addClass('h5p-panel-focused');
}
},
'blur': function () {
$title.removeClass('h5p-panel-focused');
}
}
});
$title.append($titleButton);
// Create panel content
var $content = $('<div>', {
'id': contentId,
'class': 'h5p-panel-content',
'role': 'region',
'aria-labelledby': titleId,
'aria-hidden': 'true'
});
// Add the content itself to the content section
self.instances[id].attach($content);
// Gather all content
self.elements.push($title[0]);
self.elements.push($content[0]);
};
/**
* Trigger the 'consumed' xAPI event when this commences
*
* (Will be more sophisticated in future version)
*/
Accordion.prototype.triggerConsumed = function () {
var xAPIEvent = this.createXAPIEventTemplate({
id: 'http://activitystrea.ms/schema/1.0/consume',
display: {
'en-US': 'consumed'
}
}, {
result: {
completion: true
}
});
this.trigger(xAPIEvent);
};
/**
* Collapse all expanded panels
*/
Accordion.prototype.collapseExpandedPanels = function () {
var self = this;
if (this.$expandedTitle !== undefined) {
this.$expandedButton.attr('aria-expanded', false);
this.$expandedTitle.removeClass('h5p-panel-expanded');
}
if (this.$expandedPanel !== undefined) {
this.$expandedPanel
.stop(false, true)
.slideUp(200, function () {
self.stopWorkLoop(self.resizing);
self.trigger('resize');
})
.attr('aria-hidden', true);
}
};
/**
* Expand a panel
*
* @param {jQuery} $title The title of the panel that is to be expanded
* @param {jQuery} $panel The panel that is to be expanded
*/
Accordion.prototype.expandPanel = function($title, $titleButton, $panel) {
var self = this;
$titleButton.attr('aria-expanded', true);
$title.addClass('h5p-panel-expanded');
$panel
.stop(false, true)
.slideDown(200, function () {
self.stopWorkLoop(self.resizing);
self.trigger('resize');
})
.attr('aria-hidden', false);
self.$expandedButton = $titleButton;
self.$expandedTitle = $title;
self.$expandedPanel = $panel;
};
/**
* Collapse a panel
*
* @param {jQuery} $title The title of the panel that is to be collapsed
* @param {jQuery} $panel The panel that is to be collapsed
*/
Accordion.prototype.collapsePanel = function($title, $titleButton, $panel) {
var self = this;
$titleButton.attr('aria-expanded', false)
$title.removeClass('h5p-panel-expanded');
$panel
.stop(false, true)
.slideUp(200, function () {
self.stopWorkLoop(self.resizing);
self.trigger('resize');
})
.attr('aria-hidden', true);
self.$expandedTitle = self.$expandedButton = self.$expandedPanel = undefined;
};
/**
* Makes sure that the heigt of the iframe gets animated
*/
Accordion.prototype.animateResize = function () {
var self = this;
self.stopWorkLoop(this.resizing);
this.resizing = self.startWorkLoop(function () {
self.trigger('resize');
}, 40);
};
Accordion.prototype.startWorkLoop = function (func, wait) {
var myId = nextLooperId++;
var self = this;
allowedLoopers.push(myId);
var looper = function(func, wait, myId) {
return function () {
if (self.allowedToWork(myId)) {
try {
func.call(null);
}
catch (e) {
self.stopWorkLoop(myId);
}
setTimeout(looper, wait, func, wait, myId);
}
};
} (func, wait, myId);
setTimeout(looper, wait);
return myId;
};
Accordion.prototype.stopWorkLoop = function (myId) {
var index;
while ((index = allowedLoopers.indexOf(myId)) !== -1) {
allowedLoopers.splice(index, 1);
}
};
Accordion.prototype.allowedToWork = function (myId) {
return allowedLoopers.indexOf(myId) !== -1;
};
return Accordion;
})(H5P.jQuery);
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