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/** |
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* selectFx.js v1.0.0 |
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* http://www.codrops.com |
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* |
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* Licensed under the MIT license. |
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* http://www.opensource.org/licenses/mit-license.php |
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* |
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* Copyright 2014, Codrops |
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* http://www.codrops.com |
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*/ |
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;( function( window ) { |
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|
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'use strict'; |
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|
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/** |
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* based on from https://github.com/inuyaksa/jquery.nicescroll/blob/master/jquery.nicescroll.js |
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*/ |
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function hasParent( e, p ) { |
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if (!e) return false; |
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var el = e.target||e.srcElement||e||false; |
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while (el && el != p) { |
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el = el.parentNode||false; |
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} |
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return (el!==false); |
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}; |
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|
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/** |
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* extend obj function |
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*/ |
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function extend( a, b ) { |
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for( var key in b ) { |
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if( b.hasOwnProperty( key ) ) { |
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a[key] = b[key]; |
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} |
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} |
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return a; |
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} |
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|
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/** |
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* SelectFx function |
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*/ |
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function SelectFx( el, options ) { |
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this.el = el; |
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this.options = extend( {}, this.options ); |
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extend( this.options, options ); |
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this._init(); |
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} |
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|
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/** |
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* SelectFx options |
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*/ |
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SelectFx.prototype.options = { |
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// if true all the links will open in a new tab. |
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// if we want to be redirected when we click an option, we need to define a data-link attr on the option of the native select element |
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newTab : true, |
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// when opening the select element, the default placeholder (if any) is shown |
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stickyPlaceholder : true, |
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// callback when changing the value |
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onChange : function( val ) { return false; } |
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} |
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|
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/** |
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* init function |
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* initialize and cache some vars |
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*/ |
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SelectFx.prototype._init = function() { |
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// check if we are using a placeholder for the native select box |
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// we assume the placeholder is disabled and selected by default |
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var selectedOpt = this.el.querySelector( 'option[selected]' ); |
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this.hasDefaultPlaceholder = selectedOpt && selectedOpt.disabled; |
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|
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// get selected option (either the first option with attr selected or just the first option) |
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this.selectedOpt = selectedOpt || this.el.querySelector( 'option' ); |
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|
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// create structure |
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this._createSelectEl(); |
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|
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// all options |
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this.selOpts = [].slice.call( this.selEl.querySelectorAll( 'li[data-option]' ) ); |
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|
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// total options |
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this.selOptsCount = this.selOpts.length; |
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|
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// current index |
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this.current = this.selOpts.indexOf( this.selEl.querySelector( 'li.cs-selected' ) ) || -1; |
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|
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// placeholder elem |
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this.selPlaceholder = this.selEl.querySelector( 'span.cs-placeholder' ); |
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|
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// init events |
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this._initEvents(); |
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} |
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|
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/** |
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* creates the structure for the select element |
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*/ |
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SelectFx.prototype._createSelectEl = function() { |
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var self = this, options = '', createOptionHTML = function(el) { |
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var optclass = '', classes = '', link = ''; |
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|
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if( el.selectedOpt && !this.foundSelected && !this.hasDefaultPlaceholder ) { |
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classes += 'cs-selected '; |
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this.foundSelected = true; |
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} |
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// extra classes |
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if( el.getAttribute( 'data-class' ) ) { |
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classes += el.getAttribute( 'data-class' ); |
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} |
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// link options |
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if( el.getAttribute( 'data-link' ) ) { |
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link = 'data-link=' + el.getAttribute( 'data-link' ); |
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} |
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|
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if( classes !== '' ) { |
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optclass = 'class="' + classes + '" '; |
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} |
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|
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return '<li ' + optclass + link + ' data-option data-value="' + el.value + '"><a href="#nogo" data-target="' + el.getAttribute( 'data-model' ) +'"><span>' + el.textContent + '</span></a></li>'; |
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}; |
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|
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[].slice.call( this.el.children ).forEach( function(el) { |
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if( el.disabled ) { return; } |
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|
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var tag = el.tagName.toLowerCase(); |
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|
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if( tag === 'option' ) { |
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options += createOptionHTML(el); |
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} |
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else if( tag === 'optgroup' ) { |
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options += '<li class="cs-optgroup"><span>' + el.label + '</span><ul>'; |
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[].slice.call( el.children ).forEach( function(opt) { |
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options += createOptionHTML(opt); |
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} ) |
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options += '</ul></li>'; |
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} |
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} ); |
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|
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var opts_el = '<div class="cs-options"><ul>' + options + '</ul></div>'; |
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this.selEl = document.createElement( 'div' ); |
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this.selEl.className = this.el.className; |
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this.selEl.tabIndex = this.el.tabIndex; |
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this.selEl.innerHTML = '<span class="cs-placeholder btn analitify_btn btn-default">' + this.selectedOpt.textContent + '</span>' + opts_el; |
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this.el.parentNode.appendChild( this.selEl ); |
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this.selEl.appendChild( this.el ); |
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} |
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|
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/** |
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* initialize the events |
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*/ |
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SelectFx.prototype._initEvents = function() { |
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var self = this; |
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|
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// open/close select |
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this.selPlaceholder.addEventListener( 'click', function() { |
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self._toggleSelect(); |
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} ); |
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|
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// clicking the options |
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this.selOpts.forEach( function(opt, idx) { |
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opt.addEventListener( 'click', function() { |
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self.current = idx; |
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self._changeOption(); |
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// close select elem |
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self._toggleSelect(); |
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} ); |
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} ); |
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|
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// close the select element if the target it´s not the select element or one of its descendants.. |
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document.addEventListener( 'click', function(ev) { |
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var target = ev.target; |
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if( self._isOpen() && target !== self.selEl && !hasParent( target, self.selEl ) ) { |
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self._toggleSelect(); |
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} |
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} ); |
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|
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// keyboard navigation events |
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this.selEl.addEventListener( 'keydown', function( ev ) { |
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var keyCode = ev.keyCode || ev.which; |
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|
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switch (keyCode) { |
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// up key |
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case 38: |
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ev.preventDefault(); |
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self._navigateOpts('prev'); |
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break; |
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// down key |
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case 40: |
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ev.preventDefault(); |
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self._navigateOpts('next'); |
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break; |
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// space key |
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case 32: |
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ev.preventDefault(); |
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if( self._isOpen() && typeof self.preSelCurrent != 'undefined' && self.preSelCurrent !== -1 ) { |
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self._changeOption(); |
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} |
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self._toggleSelect(); |
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break; |
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// enter key |
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case 13: |
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ev.preventDefault(); |
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if( self._isOpen() && typeof self.preSelCurrent != 'undefined' && self.preSelCurrent !== -1 ) { |
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self._changeOption(); |
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self._toggleSelect(); |
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} |
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break; |
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// esc key |
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case 27: |
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ev.preventDefault(); |
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if( self._isOpen() ) { |
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self._toggleSelect(); |
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} |
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break; |
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} |
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} ); |
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} |
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|
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/** |
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* navigate with up/dpwn keys |
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*/ |
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SelectFx.prototype._navigateOpts = function(dir) { |
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if( !this._isOpen() ) { |
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this._toggleSelect(); |
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} |
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|
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var tmpcurrent = typeof this.preSelCurrent != 'undefined' && this.preSelCurrent !== -1 ? this.preSelCurrent : this.current; |
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|
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if( dir === 'prev' && tmpcurrent > 0 || dir === 'next' && tmpcurrent < this.selOptsCount - 1 ) { |
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// save pre selected current - if we click on option, or press enter, or press space this is going to be the index of the current option |
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this.preSelCurrent = dir === 'next' ? tmpcurrent + 1 : tmpcurrent - 1; |
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// remove focus class if any.. |
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this._removeFocus(); |
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// add class focus - track which option we are navigating |
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classie.add( this.selOpts[this.preSelCurrent], 'cs-focus' ); |
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} |
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} |
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|
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/** |
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* open/close select |
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* when opened show the default placeholder if any |
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*/ |
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SelectFx.prototype._toggleSelect = function() { |
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// remove focus class if any.. |
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this._removeFocus(); |
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|
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if( this._isOpen() ) { |
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if( this.current !== -1 ) { |
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// update placeholder text |
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this.selPlaceholder.textContent = this.selOpts[ this.current ].textContent; |
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} |
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classie.remove( this.selEl, 'cs-active' ); |
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} |
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else { |
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if( this.hasDefaultPlaceholder && this.options.stickyPlaceholder ) { |
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// everytime we open we wanna see the default placeholder text |
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this.selPlaceholder.textContent = this.selectedOpt.textContent; |
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} |
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classie.add( this.selEl, 'cs-active' ); |
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} |
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} |
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|
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/** |
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* change option - the new value is set |
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*/ |
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SelectFx.prototype._changeOption = function() { |
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// if pre selected current (if we navigate with the keyboard)... |
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if( typeof this.preSelCurrent != 'undefined' && this.preSelCurrent !== -1 ) { |
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this.current = this.preSelCurrent; |
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this.preSelCurrent = -1; |
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} |
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|
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// current option |
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var opt = this.selOpts[ this.current ]; |
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|
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// update current selected value |
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this.selPlaceholder.textContent = opt.textContent; |
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|
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// change native select element´s value |
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this.el.value = opt.getAttribute( 'data-value' ); |
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|
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// remove class cs-selected from old selected option and add it to current selected option |
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var oldOpt = this.selEl.querySelector( 'li.cs-selected' ); |
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if( oldOpt ) { |
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classie.remove( oldOpt, 'cs-selected' ); |
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} |
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classie.add( opt, 'cs-selected' ); |
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|
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// if there´s a link defined |
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if( opt.getAttribute( 'data-link' ) ) { |
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// open in new tab? |
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if( this.options.newTab ) { |
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window.open( opt.getAttribute( 'data-link' ), '_blank' ); |
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} |
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else { |
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window.location = opt.getAttribute( 'data-link' ); |
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} |
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} |
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|
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// callback |
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this.options.onChange( this.el.value ); |
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} |
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|
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/** |
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* returns true if select element is opened |
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*/ |
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SelectFx.prototype._isOpen = function(opt) { |
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return classie.has( this.selEl, 'cs-active' ); |
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} |
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|
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/** |
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* removes the focus class from the option |
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*/ |
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SelectFx.prototype._removeFocus = function(opt) { |
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var focusEl = this.selEl.querySelector( 'li.cs-focus' ) |
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if( focusEl ) { |
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classie.remove( focusEl, 'cs-focus' ); |
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} |
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} |
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|
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/** |
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* add to global namespace |
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*/ |
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window.SelectFx = SelectFx; |
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|
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} )( window ); |
