S2OJ/web/js/bootstrap-slider.js

/*! =========================================================
 * bootstrap-slider.js
 *
 * Maintainers: 
 *		Kyle Kemp 
 *			- Twitter: @seiyria
 *			- Github:  seiyria
 *		Rohit Kalkur
 *			- Twitter: @Rovolutionary
 *			- Github:  rovolution
 *
 * =========================================================
 *
 * 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.
 * ========================================================= */


/**
 * Bridget makes jQuery widgets
 * v1.0.1
 * MIT license
 */

( function( window ) {

	'use strict';

	// -------------------------- utils -------------------------- //

	var slice = Array.prototype.slice;

	function noop() {}

	// -------------------------- definition -------------------------- //

	function defineBridget( $ ) {

		// bail if no jQuery
		if ( !$ ) {
			return;
		}

		// -------------------------- addOptionMethod -------------------------- //

		/**
		 * adds option method -> $().plugin('option', {...})
		 * @param {Function} PluginClass - constructor class
		 */
		function addOptionMethod( PluginClass ) {
			// don't overwrite original option method
			if ( PluginClass.prototype.option ) {
				return;
			}

		  // option setter
		  PluginClass.prototype.option = function( opts ) {
		    // bail out if not an object
		    if ( !$.isPlainObject( opts ) ){
		      return;
		    }
		    this.options = $.extend( true, this.options, opts );
		  };
		}


		// -------------------------- plugin bridge -------------------------- //

		// helper function for logging errors
		// $.error breaks jQuery chaining
		var logError = typeof console === 'undefined' ? noop :
		  function( message ) {
		    console.error( message );
		  };

		/**
		 * jQuery plugin bridge, access methods like $elem.plugin('method')
		 * @param {String} namespace - plugin name
		 * @param {Function} PluginClass - constructor class
		 */
		function bridge( namespace, PluginClass ) {
		  // add to jQuery fn namespace
		  $.fn[ namespace ] = function( options ) {
		    if ( typeof options === 'string' ) {
		      // call plugin method when first argument is a string
		      // get arguments for method
		      var args = slice.call( arguments, 1 );

		      for ( var i=0, len = this.length; i < len; i++ ) {
		        var elem = this[i];
		        var instance = $.data( elem, namespace );
		        if ( !instance ) {
		          logError( "cannot call methods on " + namespace + " prior to initialization; " +
		            "attempted to call '" + options + "'" );
		          continue;
		        }
		        if ( !$.isFunction( instance[options] ) || options.charAt(0) === '_' ) {
		          logError( "no such method '" + options + "' for " + namespace + " instance" );
		          continue;
		        }

		        // trigger method with arguments
		        var returnValue = instance[ options ].apply( instance, args);

		        // break look and return first value if provided
		        if ( returnValue !== undefined && returnValue !== instance) {
		          return returnValue;
		        }
		      }
		      // return this if no return value
		      return this;
		    } else {
		      var objects = this.map( function() {
		        var instance = $.data( this, namespace );
		        if ( instance ) {
		          // apply options & init
		          instance.option( options );
		          instance._init();
		        } else {
		          // initialize new instance
		          instance = new PluginClass( this, options );
		          $.data( this, namespace, instance );
		        }
		        return $(this);
		      });

		      if(!objects || objects.length > 1) {
		      	return objects;
		      } else {
		      	return objects[0];
		      }
		    }
		  };

		}

		// -------------------------- bridget -------------------------- //

		/**
		 * converts a Prototypical class into a proper jQuery plugin
		 *   the class must have a ._init method
		 * @param {String} namespace - plugin name, used in $().pluginName
		 * @param {Function} PluginClass - constructor class
		 */
		$.bridget = function( namespace, PluginClass ) {
		  addOptionMethod( PluginClass );
		  bridge( namespace, PluginClass );
		};

		return $.bridget;

	}

	// transport
	if ( typeof define === 'function' && define.amd ) {
	  // AMD
	  define( [ 'jquery' ], defineBridget );
	} else {
	  // get jquery from browser global
	  defineBridget( window.jQuery );
	}

})( window );


/*************************************************
				
		BOOTSTRAP-SLIDER SOURCE CODE

**************************************************/

(function( $ ) {

	var ErrorMsgs = {
		formatInvalidInputErrorMsg : function(input) {
			return "Invalid input value '" + input + "' passed in";
		},
		callingContextNotSliderInstance : "Calling context element does not have instance of Slider bound to it. Check your code to make sure the JQuery object returned from the call to the slider() initializer is calling the method"
	};



	/*************************************************
					
						CONSTRUCTOR

	**************************************************/
	var Slider = function(element, options) {
		createNewSlider.call(this, element, options);
		return this;
	};

	function createNewSlider(element, options) {
		/*************************************************
					
						Create Markup

		**************************************************/
		if(typeof element === "string") {
			this.element = document.querySelector(element);
		} else if(element instanceof HTMLElement) {
			this.element = element;
		}
		
		var origWidth = this.element.style.width;
		var updateSlider = false;
		var parent = this.element.parentNode;
		var sliderTrackSelection;
		var sliderMinHandle;
		var sliderMaxHandle;

		if (this.sliderElem) {
			updateSlider = true;
		} else {
			/* Create elements needed for slider */
			this.sliderElem = document.createElement("div");
			this.sliderElem.className = "slider";

			/* Create slider track elements */
			var sliderTrack = document.createElement("div");
			sliderTrack.className = "slider-track";

			sliderTrackSelection = document.createElement("div");
			sliderTrackSelection.className = "slider-selection";

			sliderMinHandle = document.createElement("div");
			sliderMinHandle.className = "slider-handle min-slider-handle";

			sliderMaxHandle = document.createElement("div");
			sliderMaxHandle.className = "slider-handle max-slider-handle";

			sliderTrack.appendChild(sliderTrackSelection);
			sliderTrack.appendChild(sliderMinHandle);
			sliderTrack.appendChild(sliderMaxHandle);

			var createAndAppendTooltipSubElements = function(tooltipElem) {
				var arrow = document.createElement("div");
				arrow.className = "tooltip-arrow";

				var inner = document.createElement("div");
				inner.className = "tooltip-inner";

				tooltipElem.appendChild(arrow);
				tooltipElem.appendChild(inner);
			};

			/* Create tooltip elements */
			var sliderTooltip = document.createElement("div");
			sliderTooltip.className = "tooltip tooltip-main";
			createAndAppendTooltipSubElements(sliderTooltip);

			var sliderTooltipMin = document.createElement("div");
			sliderTooltipMin.className = "tooltip tooltip-min";
			createAndAppendTooltipSubElements(sliderTooltipMin);

			var sliderTooltipMax = document.createElement("div");
			sliderTooltipMax.className = "tooltip tooltip-max";
			createAndAppendTooltipSubElements(sliderTooltipMax);


			/* Append components to sliderElem */
			this.sliderElem.appendChild(sliderTrack);
			this.sliderElem.appendChild(sliderTooltip);
			this.sliderElem.appendChild(sliderTooltipMin);
			this.sliderElem.appendChild(sliderTooltipMax);

			/* Append slider element to parent container, right before the original <input> element */
			parent.insertBefore(this.sliderElem, this.element);
			
			/* Hide original <input> element */
			this.element.style.display = "none";
		}
		/* If JQuery exists, cache JQ references */
		if(window.$) {
			this.$element = $(this.element);
			this.$sliderElem = $(this.sliderElem);
		}

		/*************************************************
					
						Process Options

		**************************************************/
		options = options ? options : {};
		var optionTypes = Object.keys(this.defaultOptions);

		for(var i = 0; i < optionTypes.length; i++) {
			var optName = optionTypes[i];

			// First check the data atrributes
			var val = getDataAttrib(this.element, optName);
			// If no data attrib, then check if an option was passed in via the constructor
			val = (val !== null) ? val : options[optName];
			// Finally, if nothing was specified, use the defaults
			val = (typeof val !== 'undefined') ? val : this.defaultOptions[optName];

			// Set all options on the instance of the Slider
			if(!this.options) {
				this.options = {};
			}
			this.options[optName] = val;
		}

		function getDataAttrib(element, optName) {
			var dataName = "data-slider-" + optName;
			var dataValString = element.getAttribute(dataName);
			
			try {
				return JSON.parse(dataValString);
			}
			catch(err) {
				return dataValString;
			}
		}

		/*************************************************
					
							Setup

		**************************************************/
		this.eventToCallbackMap = {};
		this.sliderElem.id = this.options.id;

		this.touchCapable = 'ontouchstart' in window || window.DocumentTouch && document instanceof window.DocumentTouch;

		this.tooltip = this.sliderElem.querySelector('.tooltip-main');
		this.tooltipInner = this.tooltip.querySelector('.tooltip-inner');

		this.tooltip_min = this.sliderElem.querySelector('.tooltip-min');
		this.tooltipInner_min = this.tooltip_min.querySelector('.tooltip-inner');

		this.tooltip_max = this.sliderElem.querySelector('.tooltip-max');
		this.tooltipInner_max= this.tooltip_max.querySelector('.tooltip-inner');

		if (updateSlider === true) {
			// Reset classes
			this._removeClass(this.sliderElem, 'slider-horizontal');
			this._removeClass(this.sliderElem, 'slider-vertical');
			this._removeClass(this.tooltip, 'hide');
			this._removeClass(this.tooltip_min, 'hide');
			this._removeClass(this.tooltip_max, 'hide');

			// Undo existing inline styles for track
			["left", "top", "width", "height"].forEach(function(prop) {
				this._removeProperty(this.trackSelection, prop);
			}, this);

			// Undo inline styles on handles
			[this.handle1, this.handle2].forEach(function(handle) {
				this._removeProperty(handle, 'left');
				this._removeProperty(handle, 'top');	
			}, this);

			// Undo inline styles and classes on tooltips
			[this.tooltip, this.tooltip_min, this.tooltip_max].forEach(function(tooltip) {
				this._removeProperty(tooltip, 'left');
				this._removeProperty(tooltip, 'top');
				this._removeProperty(tooltip, 'margin-left');
				this._removeProperty(tooltip, 'margin-top');

				this._removeClass(tooltip, 'right');
				this._removeClass(tooltip, 'top');
			}, this);
		}

		if(this.options.orientation === 'vertical') {
			this._addClass(this.sliderElem,'slider-vertical');
			
			this.stylePos = 'top';
			this.mousePos = 'pageY';
			this.sizePos = 'offsetHeight';

			this._addClass(this.tooltip, 'right');
			this.tooltip.style.left = '100%';
			
			this._addClass(this.tooltip_min, 'right');
			this.tooltip_min.style.left = '100%';

			this._addClass(this.tooltip_max, 'right');
			this.tooltip_max.style.left = '100%';
		} else {
			this._addClass(this.sliderElem, 'slider-horizontal');
			this.sliderElem.style.width = origWidth;

			this.options.orientation = 'horizontal';
			this.stylePos = 'left';
			this.mousePos = 'pageX';
			this.sizePos = 'offsetWidth';
			
			this._addClass(this.tooltip, 'top');
			this.tooltip.style.top = -this.tooltip.outerHeight - 14 + 'px';
			
			this._addClass(this.tooltip_min, 'top');
			this.tooltip_min.style.top = -this.tooltip_min.outerHeight - 14 + 'px';

			this._addClass(this.tooltip_max, 'top');
			this.tooltip_max.style.top = -this.tooltip_max.outerHeight - 14 + 'px';
		}

		if (this.options.value instanceof Array) {
			this.options.range = true;
		} else if (this.options.range) {
			// User wants a range, but value is not an array
			this.options.value = [this.options.value, this.options.max];
		}

		this.trackSelection = sliderTrackSelection || this.trackSelection;
		if (this.options.selection === 'none') {
			this._addClass(this.trackSelection, 'hide');
		}

		this.handle1 = sliderMinHandle || this.handle1;
		this.handle2 = sliderMaxHandle || this.handle2;

		if (updateSlider === true) {
			// Reset classes
			this._removeClass(this.handle1, 'round triangle');
			this._removeClass(this.handle2, 'round triangle hide');
		}

		var availableHandleModifiers = ['round', 'triangle', 'custom'];
		var isValidHandleType = availableHandleModifiers.indexOf(this.options.handle) !== -1;
		if (isValidHandleType) {
			this._addClass(this.handle1, this.options.handle);
			this._addClass(this.handle2, this.options.handle);
		}

		this.offset = this._offset(this.sliderElem);
		this.size = this.sliderElem[this.sizePos];
		
		this.setValue(this.options.value);

		/******************************************
					
					Bind Event Listeners

		******************************************/

		// Bind keyboard handlers
		this.handle1Keydown = this._keydown.bind(this, 0);
		this.handle1.addEventListener("keydown", this.handle1Keydown, false);

		this.handle2Keydown = this._keydown.bind(this, 0);
		this.handle2.addEventListener("keydown", this.handle2Keydown, false);

		if (this.touchCapable) {
			// Bind touch handlers
			this.mousedown = this._mousedown.bind(this);
			this.sliderElem.addEventListener("touchstart", this.mousedown, false);
		} else {
			// Bind mouse handlers
			this.mousedown = this._mousedown.bind(this);
			this.sliderElem.addEventListener("mousedown", this.mousedown, false);
		}

		// Bind tooltip-related handlers
		if(this.options.tooltip === 'hide') {
			this._addClass(this.tooltip, 'hide');
			this._addClass(this.tooltip_min, 'hide');
			this._addClass(this.tooltip_max, 'hide');
		} else if(this.options.tooltip === 'always') {
			this._showTooltip();
			this._alwaysShowTooltip = true;
		} else {
			this.showTooltip = this._showTooltip.bind(this);
			this.hideTooltip = this._hideTooltip.bind(this);

			this.sliderElem.addEventListener("mouseenter", this.showTooltip, false);
			this.sliderElem.addEventListener("mouseleave", this.hideTooltip, false);

			this.handle1.addEventListener("focus", this.showTooltip, false);
			this.handle1.addEventListener("blur", this.hideTooltip, false);

			this.handle2.addEventListener("focus", this.showTooltip, false);
			this.handle2.addEventListener("blur", this.hideTooltip, false);
		}

		if(this.options.enabled) {
			this.enable();
		} else {
			this.disable();
		}
	}

	/*************************************************
					
				INSTANCE PROPERTIES/METHODS

	- Any methods bound to the prototype are considered 
	part of the plugin's `public` interface

	**************************************************/
	Slider.prototype = {
		_init: function() {}, // NOTE: Must exist to support bridget

		constructor: Slider,

		defaultOptions: {
			id: "",
		  	min: 0,
			max: 10,
			step: 1,
			precision: 0,
			orientation: 'horizontal',
			value: 5,
			range: false,
			selection: 'before',
			tooltip: 'show',
			tooltip_split: false,
			handle: 'round',
			reversed: false,
			enabled: true,
			formatter: function(val) {
				if(val instanceof Array) {
					return val[0] + " : " + val[1];
				} else {
					return val;
				}
			},
			natural_arrow_keys: false
		},
		
		over: false,
		
		inDrag: false,

		getValue: function() {
			if (this.options.range) {
				return this.options.value;
			}
			return this.options.value[0];
		},

		setValue: function(val, triggerSlideEvent) {
			if (!val) {
				val = 0;
			}
			this.options.value = this._validateInputValue(val);
			var applyPrecision = this._applyPrecision.bind(this);

			if (this.options.range) {
				this.options.value[0] = applyPrecision(this.options.value[0]);
				this.options.value[1] = applyPrecision(this.options.value[1]); 

				this.options.value[0] = Math.max(this.options.min, Math.min(this.options.max, this.options.value[0]));
				this.options.value[1] = Math.max(this.options.min, Math.min(this.options.max, this.options.value[1]));
			} else {
				this.options.value = applyPrecision(this.options.value);
				this.options.value = [ Math.max(this.options.min, Math.min(this.options.max, this.options.value))];
				this._addClass(this.handle2, 'hide');
				if (this.selection === 'after') {
					this.options.value[1] = this.options.max;
				} else {
					this.options.value[1] = this.options.min;
				}
			}

			this.diff = this.options.max - this.options.min;
			if (this.diff > 0) {
				this.percentage = [
					(this.options.value[0] - this.options.min) * 100 / this.diff,
					(this.options.value[1] - this.options.min) * 100 / this.diff,
					this.options.step * 100 / this.diff
				];
			} else {
				this.percentage = [0, 0, 100];
			}

			this._layout();

			if(triggerSlideEvent === true) {
				var slideEventValue = this.options.range ? this.options.value : this.options.value[0];
				this._trigger('slide', slideEventValue);
				this._setDataVal(slideEventValue);
			}

			return this;
		},

		destroy: function(){
			// Remove event handlers on slider elements
			this._removeSliderEventHandlers();

			// Remove the slider from the DOM
			this.sliderElem.parentNode.removeChild(this.sliderElem);
			/* Show original <input> element */
			this.element.style.display = "";

			// Clear out custom event bindings
			this._cleanUpEventCallbacksMap();

			// Remove JQuery handlers/data
			if(window.$) {
				this._unbindJQueryEventHandlers();
				this.$element.removeData('slider');
			}
		},

		disable: function() {
			this.options.enabled = false;
			this.handle1.removeAttribute("tabindex");
			this.handle2.removeAttribute("tabindex");
			this._addClass(this.sliderElem, 'slider-disabled');
			this._trigger('slideDisabled');

			return this;
		},

		enable: function() {
			this.options.enabled = true;
			this.handle1.setAttribute("tabindex", 0);
			this.handle2.setAttribute("tabindex", 0);
			this._removeClass(this.sliderElem, 'slider-disabled');
			this._trigger('slideEnabled');

			return this;
		},

		toggle: function() {
			if(this.options.enabled) {
				this.disable();
			} else {
				this.enable();
			}

			return this;
		},

		isEnabled: function() {
			return this.options.enabled;
		},

		on: function(evt, callback) {
			if(window.$) {
				this.$element.on(evt, callback);
				this.$sliderElem.on(evt, callback);
			} else {
				this._bindNonQueryEventHandler(evt, callback);
			}
			return this;
		},

		getAttribute: function(attribute) {
			if(attribute) {
				return this.options[attribute];		
			} else {
				return this.options;
			}
		},

		setAttribute: function(attribute, value) {
			this.options[attribute] = value;
			return this;
		},

		refresh: function() {
			this._removeSliderEventHandlers();
			createNewSlider.call(this, this.element, this.options);
			if($) {
				// Bind new instance of slider to the element
				$.data(this.element, 'slider', this);
			}
			return this;
		},
		
		/******************************+
				
					HELPERS

		- Any method that is not part of the public interface.
		- Place it underneath this comment block and write its signature like so:

		  					_fnName : function() {...}

		********************************/
		_removeSliderEventHandlers: function() {
			// Remove event listeners from handle1
			this.handle1.removeEventListener("keydown", this.handle1Keydown, false);
			this.handle1.removeEventListener("focus", this.showTooltip, false);
			this.handle1.removeEventListener("blur", this.hideTooltip, false);

			// Remove event listeners from handle2
			this.handle2.removeEventListener("keydown", this.handle2Keydown, false);
			this.handle2.removeEventListener("focus", this.handle2Keydown, false);
			this.handle2.removeEventListener("blur", this.handle2Keydown, false);

			// Remove event listeners from sliderElem
			this.sliderElem.removeEventListener("mouseenter", this.showTooltip, false);
			this.sliderElem.removeEventListener("mouseleave", this.hideTooltip, false);
			this.sliderElem.removeEventListener("touchstart", this.mousedown, false);
			this.sliderElem.removeEventListener("mousedown", this.mousedown, false);
		},
		_bindNonQueryEventHandler: function(evt, callback) {
			var callbacksArray = this.eventToCallbackMap[evt];
			if(callbacksArray) {
				callbacksArray.push(callback);
			} else {
				this.eventToCallbackMap[evt] = [];
			}
		},
		_cleanUpEventCallbacksMap: function() {
			var eventNames = Object.keys(this.eventToCallbackMap);
			for(var i = 0; i < eventNames.length; i++) {
				var eventName = eventNames[i];
				this.eventToCallbackMap[eventName] = null;
			}
		},
		_showTooltip: function() {
			if (this.options.tooltip_split === false ){
            	this._addClass(this.tooltip, 'in');
	        } else {
	            this._addClass(this.tooltip_min, 'in');
	            this._addClass(this.tooltip_max, 'in');
	        }
			this.over = true;
		},
		_hideTooltip: function() {
			if (this.inDrag === false && this.alwaysShowTooltip !== true) {
				this._removeClass(this.tooltip, 'in');
				this._removeClass(this.tooltip_min, 'in');
				this._removeClass(this.tooltip_max, 'in');
			}
			this.over = false;
		},
		_layout: function() {			
			var positionPercentages;

			if(this.options.reversed) {
				positionPercentages = [ 100 - this.percentage[0], this.percentage[1] ];
			} else {
				positionPercentages = [ this.percentage[0], this.percentage[1] ];
			}

			this.handle1.style[this.stylePos] = positionPercentages[0]+'%';
			this.handle2.style[this.stylePos] = positionPercentages[1]+'%';


			if (this.options.orientation === 'vertical') {
				this.trackSelection.style.top = Math.min(positionPercentages[0], positionPercentages[1]) +'%';
				this.trackSelection.style.height = Math.abs(positionPercentages[0] - positionPercentages[1]) +'%';
			} else {
				this.trackSelection.style.left = Math.min(positionPercentages[0], positionPercentages[1]) +'%';
				this.trackSelection.style.width = Math.abs(positionPercentages[0] - positionPercentages[1]) +'%';

		        var offset_min = this.tooltip_min.getBoundingClientRect();
		        var offset_max = this.tooltip_max.getBoundingClientRect();

		        if (offset_min.right > offset_max.left) {
		            this._removeClass(this.tooltip_max, 'top');
		            this._addClass(this.tooltip_max, 'bottom');
		            this.tooltip_max.style.top = 18 + 'px';
		        } else {
		            this._removeClass(this.tooltip_max, 'bottom');
		            this._addClass(this.tooltip_max, 'top');
		            this.tooltip_max.style.top = -30 + 'px';
		        }
 			}


 			var formattedTooltipVal;

			if (this.options.range) {
				formattedTooltipVal = this.options.formatter(this.options.value);
				this._setText(this.tooltipInner, formattedTooltipVal);
				this.tooltip.style[this.stylePos] = (positionPercentages[1] + positionPercentages[0])/2 + '%';

				if (this.options.orientation === 'vertical') {
					this._css(this.tooltip, 'margin-top', -this.tooltip.offsetHeight / 2 + 'px');
				} else {
					this._css(this.tooltip, 'margin-left', -this.tooltip.offsetWidth / 2 + 'px');
				}
				
				if (this.options.orientation === 'vertical') {
					this._css(this.tooltip, 'margin-top', -this.tooltip.offsetHeight / 2 + 'px');
				} else {
					this._css(this.tooltip, 'margin-left', -this.tooltip.offsetWidth / 2 + 'px');
				}
				
				var innerTooltipMinText = this.options.formatter(this.options.value[0]);
				this._setText(this.tooltipInner_min, innerTooltipMinText);

				var innerTooltipMaxText = this.options.formatter(this.options.value[1]);
				this._setText(this.tooltipInner_max, innerTooltipMaxText);

				this.tooltip_min.style[this.stylePos] = positionPercentages[0] + '%';

				if (this.options.orientation === 'vertical') {
					this._css(this.tooltip_min, 'margin-top', -this.tooltip_min.offsetHeight / 2 + 'px');
				} else {
					this._css(this.tooltip_min, 'margin-left', -this.tooltip_min.offsetWidth / 2 + 'px');
				}

				this.tooltip_max.style[this.stylePos] = positionPercentages[1] + '%';

				if (this.options.orientation === 'vertical') {
					this._css(this.tooltip_max, 'margin-top', -this.tooltip_max.offsetHeight / 2 + 'px');
				} else {
					this._css(this.tooltip_max, 'margin-left', -this.tooltip_max.offsetWidth / 2 + 'px');
				}
			} else {
				formattedTooltipVal = this.options.formatter(this.options.value[0]);
				this._setText(this.tooltipInner, formattedTooltipVal);

				this.tooltip.style[this.stylePos] = positionPercentages[0] + '%';
				if (this.options.orientation === 'vertical') {
					this._css(this.tooltip, 'margin-top', -this.tooltip.offsetHeight / 2 + 'px');
				} else {
					this._css(this.tooltip, 'margin-left', -this.tooltip.offsetWidth / 2 + 'px');
				}
			}
		},
		_removeProperty: function(element, prop) {
			if (element.style.removeProperty) {
			    element.style.removeProperty(prop);
			} else {
			    element.style.removeAttribute(prop);
			}
		},
		_mousedown: function(ev) {
			if(!this.options.enabled) {
				return false;
			}

			// Touch: Get the original event:
			if (this.touchCapable && ev.type === 'touchstart') {
				ev = ev.originalEvent;
			}

			this._triggerFocusOnHandle();

			this.offset = this._offset(this.sliderElem);
			this.size = this.sliderElem[this.sizePos];

			var percentage = this._getPercentage(ev);

			if (this.options.range) {
				var diff1 = Math.abs(this.percentage[0] - percentage);
				var diff2 = Math.abs(this.percentage[1] - percentage);
				this.dragged = (diff1 < diff2) ? 0 : 1;
			} else {
				this.dragged = 0;
			}

			this.percentage[this.dragged] = this.options.reversed ? 100 - percentage : percentage;
			this._layout();

			this.mousemove = this._mousemove.bind(this);
			this.mouseup = this._mouseup.bind(this);

			if (this.touchCapable) {
				// Touch: Bind touch events:
				document.addEventListener("touchmove", this.mousemove, false);
				document.addEventListener("touchend", this.mouseup, false);
			} else {
				// Bind mouse events:
				document.addEventListener("mousemove", this.mousemove, false);
				document.addEventListener("mouseup", this.mouseup, false);
			}

			this.inDrag = true;

			var val = this._calculateValue();
			this._trigger('slideStart', val);
			this._setDataVal(val);
			this.setValue(val);

			this._pauseEvent(ev);

			return true;
		},
		_triggerFocusOnHandle: function(handleIdx) {
			if(handleIdx === 0) {
				this.handle1.focus();
			}
			if(handleIdx === 1) {
				this.handle2.focus();
			}
		},
		_keydown: function(handleIdx, ev) {
			if(!this.options.enabled) {
				return false;
			}

			var dir;
			switch (ev.keyCode) {
				case 37: // left
				case 40: // down
					dir = -1;
					break;
				case 39: // right
				case 38: // up
					dir = 1;
					break;
			}
			if (!dir) {
				return;
			}

			// use natural arrow keys instead of from min to max
			if (this.options.natural_arrow_keys) {
				var ifVerticalAndNotReversed = (this.options.orientation === 'vertical' && !this.options.reversed);
				var ifHorizontalAndReversed = (this.options.orientation === 'horizontal' && this.options.reversed);

				if (ifVerticalAndNotReversed || ifHorizontalAndReversed) {
					dir = dir * -1;
				}
			}

			var oneStepValuePercentageChange = dir * this.percentage[2];
			var percentage = this.percentage[handleIdx] + oneStepValuePercentageChange;

			if (percentage > 100) {
				percentage = 100;
			} else if (percentage < 0) {
				percentage = 0;
			}

			this.dragged = handleIdx;
			this._adjustPercentageForRangeSliders(percentage);
			this.percentage[this.dragged] = percentage;
			this._layout();

			var val = this._calculateValue();
			
			this._trigger('slideStart', val);
			this._setDataVal(val);
			this.setValue(val, true);

			this._trigger('slideStop', val);
			this._setDataVal(val);
			
			this._pauseEvent(ev);

			return false;
		},
		_pauseEvent: function(ev) {
			if(ev.stopPropagation) {
				ev.stopPropagation();
			}
		    if(ev.preventDefault) {
		    	ev.preventDefault();
		    }
		    ev.cancelBubble=true;
		    ev.returnValue=false;			
		},
		_mousemove: function(ev) {
			if(!this.options.enabled) {
				return false;
			}

			// Touch: Get the original event:
			if (this.touchCapable && ev.type === 'touchmove') {
				ev = ev.originalEvent;
			}

			var percentage = this._getPercentage(ev);
			this._adjustPercentageForRangeSliders(percentage);
			this.percentage[this.dragged] = this.options.reversed ? 100 - percentage : percentage;
			this._layout();

			var val = this._calculateValue();
			this.setValue(val, true);

			return false;
		},
		_adjustPercentageForRangeSliders: function(percentage) {
			if (this.options.range) {
				if (this.dragged === 0 && this.percentage[1] < percentage) {
					this.percentage[0] = this.percentage[1];
					this.dragged = 1;
				} else if (this.dragged === 1 && this.percentage[0] > percentage) {
					this.percentage[1] = this.percentage[0];
					this.dragged = 0;
				}
			}
		},
		_mouseup: function() {
			if(!this.options.enabled) {
				return false;
			}
			if (this.touchCapable) {
				// Touch: Unbind touch event handlers:
				document.removeEventListener("touchmove", this.mousemove, false);
				document.removeEventListener("touchend", this.mouseup, false);
			} else {
				// Unbind mouse event handlers:
				document.removeEventListener("mousemove", this.mousemove, false);
				document.removeEventListener("mouseup", this.mouseup, false);
			}
			
			this.inDrag = false;
			if (this.over === false) {
				this._hideTooltip();
			}
			var val = this._calculateValue();
			
			this._layout();
			this._setDataVal(val);
			this._trigger('slideStop', val);
			
			return false;
		},
		_calculateValue: function() {
			var val;
			if (this.options.range) {
				val = [this.options.min,this.options.max];
		        if (this.percentage[0] !== 0){
		            val[0] = (Math.max(this.options.min, this.options.min + Math.round((this.diff * this.percentage[0]/100)/this.options.step)*this.options.step));
		            val[0] = this._applyPrecision(val[0]);
		        }
		        if (this.percentage[1] !== 100){
		            val[1] = (Math.min(this.options.max, this.options.min + Math.round((this.diff * this.percentage[1]/100)/this.options.step)*this.options.step));
		            val[1] = this._applyPrecision(val[1]);
		        }
				this.options.value = val;
			} else {
				val = (this.options.min + Math.round((this.diff * this.percentage[0]/100)/this.options.step)*this.options.step);
				if (val < this.options.min) {
					val = this.options.min;
				}
				else if (val > this.options.max) {
					val = this.options.max;
				}
				val = parseFloat(val);
				val = this._applyPrecision(val);
				this.options.value = [val, this.options.value[1]];
			}
			return val;
		},
		_applyPrecision: function(val) {
			var precision = this.options.precision || this._getNumDigitsAfterDecimalPlace(this.step);
			return this._applyToFixedAndParseFloat(val, precision);
		},
		_getNumDigitsAfterDecimalPlace: function(num) {
			var match = (''+num).match(/(?:\.(\d+))?(?:[eE]([+-]?\d+))?$/);
			if (!match) { return 0; }
			return Math.max(0, (match[1] ? match[1].length : 0) - (match[2] ? +match[2] : 0));
		},
		_applyToFixedAndParseFloat: function(num, toFixedInput) {
			var truncatedNum = num.toFixed(toFixedInput);
			return parseFloat(truncatedNum);
		},
		/*
			Credits to Mike Samuel for the following method!
			Source: http://stackoverflow.com/questions/10454518/javascript-how-to-retrieve-the-number-of-decimals-of-a-string-number
		*/
		_getPercentage: function(ev) {
			if (this.touchCapable && (ev.type === 'touchstart' || ev.type === 'touchmove')) {
				ev = ev.touches[0];
			}
			var percentage = (ev[this.mousePos] - this.offset[this.stylePos])*100/this.size;
			percentage = Math.round(percentage/this.percentage[2])*this.percentage[2];
			return Math.max(0, Math.min(100, percentage));
		},
		_validateInputValue: function(val) {
			if(typeof val === 'number') {
				return val;
			} else if(val instanceof Array) {
				this._validateArray(val);
				return val;
			} else {
				throw new Error( ErrorMsgs.formatInvalidInputErrorMsg(val) );
			}
		},
		_validateArray: function(val) {
			for(var i = 0; i < val.length; i++) {
				var input =  val[i];
				if (typeof input !== 'number') { throw new Error( ErrorMsgs.formatInvalidInputErrorMsg(input) ); }
			}
		},
		_setDataVal: function(val) {
			var value = "value: '" + val + "'";
			this.element.setAttribute('data', value);
		},
		_trigger: function(evt, val) {
			val = val || undefined;

			var callbackFnArray = this.eventToCallbackMap[evt];
			if(callbackFnArray && callbackFnArray.length) {
				for(var i = 0; i < callbackFnArray.length; i++) {
					var callbackFn = callbackFnArray[i];
					callbackFn(val);
				}
			}

			/* If JQuery exists, trigger JQuery events */
			if(window.$) {
				this._triggerJQueryEvent(evt, val);
			}
		},
		_triggerJQueryEvent: function(evt, val) {
			var eventData = {
				type: evt,
				value: val
			};
			this.$element.trigger(eventData);
			this.$sliderElem.trigger(eventData);
		},
		_unbindJQueryEventHandlers: function() {
			this.$element.off();
			this.$sliderElem.off();
		},
		_setText: function(element, text) {
			if(typeof element.innerText !== "undefined") {
		 		element.innerText = text;
		 	} else if(typeof element.textContent !== "undefined") {
		 		element.textContent = text;
		 	}
		},
		_removeClass: function(element, classString) {
			var classes = classString.split(" ");
			var newClasses = element.className;

			for(var i = 0; i < classes.length; i++) {
				var classTag = classes[i];
				var regex = new RegExp("(?:\\s|^)" + classTag + "(?:\\s|$)");
				newClasses = newClasses.replace(regex, " ");
			}

			element.className = newClasses.trim();
		},
		_addClass: function(element, classString) {
			var classes = classString.split(" ");
			var newClasses = element.className;

			for(var i = 0; i < classes.length; i++) {
				var classTag = classes[i];
				var regex = new RegExp("(?:\\s|^)" + classTag + "(?:\\s|$)");
				var ifClassExists = regex.test(newClasses);
				
				if(!ifClassExists) {
					newClasses += " " + classTag;
				}
			}

			element.className = newClasses.trim();
		},
		_offset: function (obj) {
			var ol = 0;
			var ot = 0;
			if (obj.offsetParent) {
				do {
				  ol += obj.offsetLeft;
				  ot += obj.offsetTop;
				} while (obj = obj.offsetParent);
			}
			return {
				left: ol,
				top: ot
			};
		},
		_css: function(elementRef, styleName, value) {
			elementRef.style[styleName] = value;
		}
	};

	/*********************************

		Attach to global namespace

	*********************************/
	if($) {
		var namespace = $.fn.slider ? 'bootstrapSlider' : 'slider';
		$.bridget(namespace, Slider);
	}
	window.Slider = Slider;


})( window.jQuery );