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// Define a function that will run in the context of a
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// Node instance:
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var CSS = {
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LINK: 'mod-assign-history-link',
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OPEN: 'mod-assign-history-link-open',
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CLOSED: 'mod-assign-history-link-closed',
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PANEL: 'mod-assign-history-panel'
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},
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COUNT = 0,
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TOGGLE = function() {
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var id = this.get('for'),
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panel = Y.one('#' + id);
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if (this.hasClass(CSS.OPEN)) {
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this.removeClass(CSS.OPEN);
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this.addClass(CSS.CLOSED);
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this.setStyle('overflow', 'hidden');
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panel.hide();
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} else {
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this.removeClass(CSS.CLOSED);
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this.addClass(CSS.OPEN);
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panel.show();
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}
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},
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HISTORY = function() {
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var link = null,
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panel = null,
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wrapper = null,
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container = this;
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// Loop through all the children of this container and turn
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// every odd node to a link to open/close the following panel.
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this.get('children').each(function() {
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if (link) {
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COUNT++;
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// First convert the link to an anchor.
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wrapper = Y.Node.create('<a/>');
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panel = this;
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container.insertBefore(wrapper, link);
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link.remove(false);
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wrapper.appendChild(link);
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// Add a for attribute to the link to link to the id of the panel.
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if (!panel.get('id')) {
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panel.set('id', CSS.PANEL + COUNT);
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}
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wrapper.set('for', panel.get('id'));
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// Add an aria attribute for the live region.
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panel.set('aria-live', 'polite');
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wrapper.addClass(CSS.LINK);
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if (COUNT == 1) {
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wrapper.addClass(CSS.OPEN);
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} else {
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wrapper.addClass(CSS.CLOSED);
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}
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panel.addClass(CSS.PANEL);
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if (COUNT == 1) {
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panel.show();
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} else {
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panel.hide();
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}
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link = null;
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} else {
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link = this;
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}
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});
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// Setup event listeners.
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this.delegate('click', TOGGLE, '.' + CSS.LINK);
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};
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// Use addMethod to add history to the Node prototype:
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Y.Node.addMethod("history", HISTORY);
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// Extend this functionality to NodeLists.
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Y.NodeList.importMethod(Y.Node.prototype, "history");
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