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/**
* @license
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function() {
'use strict';
/**
* Class constructor for Tabs MDL component.
* Implements MDL component design pattern defined at:
* https://github.com/jasonmayes/mdl-component-design-pattern
*
* @constructor
* @param {Element} element The element that will be upgraded.
*/
var MaterialTabs = function MaterialTabs(element) {
// Stores the HTML element.
this.element_ = element;
// Initialize instance.
this.init();
};
window['MaterialTabs'] = MaterialTabs;
/**
* Store constants in one place so they can be updated easily.
*
* @enum {string}
* @private
*/
MaterialTabs.prototype.Constant_ = {
// None at the moment.
};
/**
* Store strings for class names defined by this component that are used in
* JavaScript. This allows us to simply change it in one place should we
* decide to modify at a later date.
*
* @enum {string}
* @private
*/
MaterialTabs.prototype.CssClasses_ = {
TAB_CLASS: 'mdl-tabs__tab',
PANEL_CLASS: 'mdl-tabs__panel',
ACTIVE_CLASS: 'is-active',
UPGRADED_CLASS: 'is-upgraded',
MDL_JS_RIPPLE_EFFECT: 'mdl-js-ripple-effect',
MDL_RIPPLE_CONTAINER: 'mdl-tabs__ripple-container',
MDL_RIPPLE: 'mdl-ripple',
MDL_JS_RIPPLE_EFFECT_IGNORE_EVENTS: 'mdl-js-ripple-effect--ignore-events'
};
/**
* Handle clicks to a tabs component
*
* @private
*/
MaterialTabs.prototype.initTabs_ = function() {
if (this.element_.classList.contains(this.CssClasses_.MDL_JS_RIPPLE_EFFECT)) {
this.element_.classList.add(
this.CssClasses_.MDL_JS_RIPPLE_EFFECT_IGNORE_EVENTS);
}
// Select element tabs, document panels
this.tabs_ = this.element_.querySelectorAll('.' + this.CssClasses_.TAB_CLASS);
this.panels_ =
this.element_.querySelectorAll('.' + this.CssClasses_.PANEL_CLASS);
// Create new tabs for each tab element
for (var i = 0; i < this.tabs_.length; i++) {
new MaterialTab(this.tabs_[i], this);
}
this.element_.classList.add(this.CssClasses_.UPGRADED_CLASS);
};
/**
* Reset tab state, dropping active classes
*
* @private
*/
MaterialTabs.prototype.resetTabState_ = function() {
for (var k = 0; k < this.tabs_.length; k++) {
this.tabs_[k].classList.remove(this.CssClasses_.ACTIVE_CLASS);
}
};
/**
* Reset panel state, droping active classes
*
* @private
*/
MaterialTabs.prototype.resetPanelState_ = function() {
for (var j = 0; j < this.panels_.length; j++) {
this.panels_[j].classList.remove(this.CssClasses_.ACTIVE_CLASS);
}
};
/**
* Initialize element.
*/
MaterialTabs.prototype.init = function() {
if (this.element_) {
this.initTabs_();
}
};
/**
* Constructor for an individual tab.
*
* @constructor
* @param {Element} tab The HTML element for the tab.
* @param {MaterialTabs} ctx The MaterialTabs object that owns the tab.
*/
function MaterialTab(tab, ctx) {
if (tab) {
if (ctx.element_.classList.contains(ctx.CssClasses_.MDL_JS_RIPPLE_EFFECT)) {
var rippleContainer = document.createElement('span');
rippleContainer.classList.add(ctx.CssClasses_.MDL_RIPPLE_CONTAINER);
rippleContainer.classList.add(ctx.CssClasses_.MDL_JS_RIPPLE_EFFECT);
var ripple = document.createElement('span');
ripple.classList.add(ctx.CssClasses_.MDL_RIPPLE);
rippleContainer.appendChild(ripple);
tab.appendChild(rippleContainer);
}
tab.addEventListener('click', function(e) {
if (tab.getAttribute('href').charAt(0) === '#') {
e.preventDefault();
var href = tab.href.split('#')[1];
var panel = ctx.element_.querySelector('#' + href);
ctx.resetTabState_();
ctx.resetPanelState_();
tab.classList.add(ctx.CssClasses_.ACTIVE_CLASS);
panel.classList.add(ctx.CssClasses_.ACTIVE_CLASS);
}
});
}
}
// The component registers itself. It can assume componentHandler is available
// in the global scope.
componentHandler.register({
constructor: MaterialTabs,
classAsString: 'MaterialTabs',
cssClass: 'mdl-js-tabs'
});
})();