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/*!
 * jQuery UI Spinner 1.14.2
 * https://jqueryui.com
 *
 * Copyright OpenJS Foundation and other contributors
 * Released under the MIT license.
 * https://jquery.org/license
 */

//>>label: Spinner
//>>group: Widgets
//>>description: Displays buttons to easily input numbers via the keyboard or mouse.
//>>docs: https://api.jqueryui.com/spinner/
//>>demos: https://jqueryui.com/spinner/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/spinner.css
//>>css.theme: ../../themes/base/theme.css

( function( factory ) {
	"use strict";

if ( typeof define === "function" && define.amd ) {

// AMD. Register as an anonymous module.
		define( [
			"jquery",
			"./button",
			"../version",
			"../keycode",
			"../widget"
		], factory );
	} else {

// Browser globals
		factory( jQuery );
	}
} )( function( $ ) {
"use strict";

$.widget( "ui.spinner", {
	version: "1.14.2",
	defaultElement: "<input>",
	widgetEventPrefix: "spin",
	options: {
		classes: {
			"ui-spinner": "ui-corner-all",
			"ui-spinner-down": "ui-corner-br",
			"ui-spinner-up": "ui-corner-tr"
		},
		culture: null,
		icons: {
			down: "ui-icon-triangle-1-s",
			up: "ui-icon-triangle-1-n"
		},
		incremental: true,
		max: null,
		min: null,
		numberFormat: null,
		page: 10,
		step: 1,

change: null,
		spin: null,
		start: null,
		stop: null
	},

_create: function() {

// handle string values that need to be parsed
		this._setOption( "max", this.options.max );
		this._setOption( "min", this.options.min );
		this._setOption( "step", this.options.step );

// Only format if there is a value, prevents the field from being marked
		// as invalid in Firefox, see #9573.
		if ( this.value() !== "" ) {

// Format the value, but don't constrain.
			this._value( this.element.val(), true );
		}

this._draw();
		this._on( this._events );
		this._refresh();

// Turning off autocomplete prevents the browser from remembering the
		// value when navigating through history, so we re-enable autocomplete
		// if the page is unloaded before the widget is destroyed. #7790
		this._on( this.window, {
			beforeunload: function() {
				this.element.removeAttr( "autocomplete" );
			}
		} );
	},

_getCreateOptions: function() {
		var options = this._super();
		var element = this.element;

$.each( [ "min", "max", "step" ], function( i, option ) {
			var value = element.attr( option );
			if ( value != null && value.length ) {
				options[ option ] = value;
			}
		} );

return options;
	},

_events: {
		keydown: function( event ) {
			if ( this._start( event ) && this._keydown( event ) ) {
				event.preventDefault();
			}
		},
		keyup: "_stop",
		focus: function() {
			this.previous = this.element.val();
		},
		blur: function( event ) {
			this._stop();
			this._refresh();
			if ( this.previous !== this.element.val() ) {
				this._trigger( "change", event );
			}
		},
		wheel: function( event ) {
			var activeElement = this.document[ 0 ].activeElement;
			var isActive = this.element[ 0 ] === activeElement;
			var delta = event.deltaY || event.originalEvent && event.originalEvent.deltaY;

if ( !isActive || !delta ) {
				return;
			}

if ( !this.spinning && !this._start( event ) ) {
				return false;
			}

this._spin( ( delta > 0 ? -1 : 1 ) * this.options.step, event );
			clearTimeout( this.mousewheelTimer );
			this.mousewheelTimer = this._delay( function() {
				if ( this.spinning ) {
					this._stop( event );
				}
			}, 100 );
			event.preventDefault();
		},

// DEPRECATED
		// Kept for backwards compatibility. Please use the modern `wheel`
		// event. The `delta` parameter is provided by the jQuery Mousewheel
		// plugin if one is loaded.
		mousewheel: function( event, delta ) {
			if ( !event.isTrigger ) {

// If this is not a trigger call, the `wheel` handler will
				// fire as well, let's not duplicate it.
				return;
			}

var wheelEvent = $.Event( event );
			wheelEvent.type = "wheel";
			if ( delta ) {
				wheelEvent.deltaY = -delta;
			}
			return this._events.wheel.call( this, wheelEvent );
		},

"mousedown .ui-spinner-button": function( event ) {
			var previous;

// We never want the buttons to have focus; whenever the user is
			// interacting with the spinner, the focus should be on the input.
			// If the input is focused then this.previous is properly set from
			// when the input first received focus. If the input is not focused
			// then we need to set this.previous based on the value before spinning.
			previous = this.element[ 0 ] === this.document[ 0 ].activeElement ?
				this.previous : this.element.val();
			function checkFocus() {
				var isActive = this.element[ 0 ] === this.document[ 0 ].activeElement;
				if ( !isActive ) {
					this.element.trigger( "focus" );
					this.previous = previous;
				}
			}

// Ensure focus is on (or stays on) the text field
			event.preventDefault();
			checkFocus.call( this );

if ( this._start( event ) === false ) {
				return;
			}

this._repeat( null, $( event.currentTarget )
				.hasClass( "ui-spinner-up" ) ? 1 : -1, event );
		},
		"mouseup .ui-spinner-button": "_stop",
		"mouseenter .ui-spinner-button": function( event ) {

// button will add ui-state-active if mouse was down while mouseleave and kept down
			if ( !$( event.currentTarget ).hasClass( "ui-state-active" ) ) {
				return;
			}

if ( this._start( event ) === false ) {
				return false;
			}
			this._repeat( null, $( event.currentTarget )
				.hasClass( "ui-spinner-up" ) ? 1 : -1, event );
		},

// TODO: do we really want to consider this a stop?
		// shouldn't we just stop the repeater and wait until mouseup before
		// we trigger the stop event?
		"mouseleave .ui-spinner-button": "_stop"
	},

// Support mobile enhanced option and make backcompat more sane
	_enhance: function() {
		this.uiSpinner = this.element
			.attr( "autocomplete", "off" )
			.wrap( "<span>" )
			.parent()

// Add buttons
				.append(
					"<a></a><a></a>"
				);
	},

_draw: function() {
		this._enhance();

this._addClass( this.uiSpinner, "ui-spinner", "ui-widget ui-widget-content" );
		this._addClass( "ui-spinner-input" );

this.element.attr( "role", "spinbutton" );

// Button bindings
		this.buttons = this.uiSpinner.children( "a" )
			.attr( "tabIndex", -1 )
			.attr( "aria-hidden", true )
			.button( {
				classes: {
					"ui-button": ""
				}
			} );

// TODO: Right now button does not support classes this is already updated in button PR
		this._removeClass( this.buttons, "ui-corner-all" );

this._addClass( this.buttons.first(), "ui-spinner-button ui-spinner-up" );
		this._addClass( this.buttons.last(), "ui-spinner-button ui-spinner-down" );
		this.buttons.first().button( {
			"icon": this.options.icons.up,
			"showLabel": false
		} );
		this.buttons.last().button( {
			"icon": this.options.icons.down,
			"showLabel": false
		} );

// IE 6 doesn't understand height: 50% for the buttons
		// unless the wrapper has an explicit height
		if ( this.buttons.height() > Math.ceil( this.uiSpinner.height() * 0.5 ) &&
				this.uiSpinner.height() > 0 ) {
			this.uiSpinner.height( this.uiSpinner.height() );
		}
	},

_keydown: function( event ) {
		var options = this.options,
			keyCode = $.ui.keyCode;

switch ( event.keyCode ) {
		case keyCode.UP:
			this._repeat( null, 1, event );
			return true;
		case keyCode.DOWN:
			this._repeat( null, -1, event );
			return true;
		case keyCode.PAGE_UP:
			this._repeat( null, options.page, event );
			return true;
		case keyCode.PAGE_DOWN:
			this._repeat( null, -options.page, event );
			return true;
		}

return false;
	},

_start: function( event ) {
		if ( !this.spinning && this._trigger( "start", event ) === false ) {
			return false;
		}

if ( !this.counter ) {
			this.counter = 1;
		}
		this.spinning = true;
		return true;
	},

_repeat: function( i, steps, event ) {
		i = i || 500;

clearTimeout( this.timer );
		this.timer = this._delay( function() {
			this._repeat( 40, steps, event );
		}, i );

this._spin( steps * this.options.step, event );
	},

_spin: function( step, event ) {
		var value = this.value() || 0;

if ( !this.counter ) {
			this.counter = 1;
		}

value = this._adjustValue( value + step * this._increment( this.counter ) );

if ( !this.spinning || this._trigger( "spin", event, { value: value } ) !== false ) {
			this._value( value );
			this.counter++;
		}
	},

_increment: function( i ) {
		var incremental = this.options.incremental;

if ( incremental ) {
			return typeof incremental === "function" ?
				incremental( i ) :
				Math.floor( i * i * i / 50000 - i * i / 500 + 17 * i / 200 + 1 );
		}

return 1;
	},

_precision: function() {
		var precision = this._precisionOf( this.options.step );
		if ( this.options.min !== null ) {
			precision = Math.max( precision, this._precisionOf( this.options.min ) );
		}
		return precision;
	},

_precisionOf: function( num ) {
		var str = num.toString(),
			decimal = str.indexOf( "." );
		return decimal === -1 ? 0 : str.length - decimal - 1;
	},

_adjustValue: function( value ) {
		var base, aboveMin,
			options = this.options;

// Make sure we're at a valid step
		// - find out where we are relative to the base (min or 0)
		base = options.min !== null ? options.min : 0;
		aboveMin = value - base;

// - round to the nearest step
		aboveMin = Math.round( aboveMin / options.step ) * options.step;

// - rounding is based on 0, so adjust back to our base
		value = base + aboveMin;

// Fix precision from bad JS floating point math
		value = parseFloat( value.toFixed( this._precision() ) );

// Clamp the value
		if ( options.max !== null && value > options.max ) {
			return options.max;
		}
		if ( options.min !== null && value < options.min ) {
			return options.min;
		}

return value;
	},

_stop: function( event ) {
		if ( !this.spinning ) {
			return;
		}

clearTimeout( this.timer );
		clearTimeout( this.mousewheelTimer );
		this.counter = 0;
		this.spinning = false;
		this._trigger( "stop", event );
	},

_setOption: function( key, value ) {
		var prevValue, first, last;

if ( key === "culture" || key === "numberFormat" ) {
			prevValue = this._parse( this.element.val() );
			this.options[ key ] = value;
			this.element.val( this._format( prevValue ) );
			return;
		}

if ( key === "max" || key === "min" || key === "step" ) {
			if ( typeof value === "string" ) {
				value = this._parse( value );
			}
		}
		if ( key === "icons" ) {
			first = this.buttons.first().find( ".ui-icon" );
			this._removeClass( first, null, this.options.icons.up );
			this._addClass( first, null, value.up );
			last = this.buttons.last().find( ".ui-icon" );
			this._removeClass( last, null, this.options.icons.down );
			this._addClass( last, null, value.down );
		}

this._super( key, value );
	},

_setOptionDisabled: function( value ) {
		this._super( value );

this._toggleClass( this.uiSpinner, null, "ui-state-disabled", !!value );
		this.element.prop( "disabled", !!value );
		this.buttons.button( value ? "disable" : "enable" );
	},

_setOptions: spinnerModifier( function( options ) {
		this._super( options );
	} ),

_parse: function( val ) {
		if ( typeof val === "string" && val !== "" ) {
			val = window.Globalize && this.options.numberFormat ?
				Globalize.parseFloat( val, 10, this.options.culture ) : +val;
		}
		return val === "" || isNaN( val ) ? null : val;
	},

_format: function( value ) {
		if ( value === "" ) {
			return "";
		}
		return window.Globalize && this.options.numberFormat ?
			Globalize.format( value, this.options.numberFormat, this.options.culture ) :
			value;
	},

_refresh: function() {
		this.element.attr( {
			"aria-valuemin": this.options.min,
			"aria-valuemax": this.options.max,

// TODO: what should we do with values that can't be parsed?
			"aria-valuenow": this._parse( this.element.val() )
		} );
	},

isValid: function() {
		var value = this.value();

// Null is invalid
		if ( value === null ) {
			return false;
		}

// If value gets adjusted, it's invalid
		return value === this._adjustValue( value );
	},

// Update the value without triggering change
	_value: function( value, allowAny ) {
		var parsed;
		if ( value !== "" ) {
			parsed = this._parse( value );
			if ( parsed !== null ) {
				if ( !allowAny ) {
					parsed = this._adjustValue( parsed );
				}
				value = this._format( parsed );
			}
		}
		this.element.val( value );
		this._refresh();
	},

_destroy: function() {
		this.element
			.prop( "disabled", false )
			.removeAttr( "autocomplete role aria-valuemin aria-valuemax aria-valuenow" );

this.uiSpinner.replaceWith( this.element );
	},

stepUp: spinnerModifier( function( steps ) {
		this._stepUp( steps );
	} ),
	_stepUp: function( steps ) {
		if ( this._start() ) {
			this._spin( ( steps || 1 ) * this.options.step );
			this._stop();
		}
	},

stepDown: spinnerModifier( function( steps ) {
		this._stepDown( steps );
	} ),
	_stepDown: function( steps ) {
		if ( this._start() ) {
			this._spin( ( steps || 1 ) * -this.options.step );
			this._stop();
		}
	},

pageUp: spinnerModifier( function( pages ) {
		this._stepUp( ( pages || 1 ) * this.options.page );
	} ),

pageDown: spinnerModifier( function( pages ) {
		this._stepDown( ( pages || 1 ) * this.options.page );
	} ),

value: function( newVal ) {
		if ( !arguments.length ) {
			return this._parse( this.element.val() );
		}
		spinnerModifier( this._value ).call( this, newVal );
	},

widget: function() {
		return this.uiSpinner;
	}
} );

// DEPRECATED
// TODO: switch return back to widget declaration at top of file when this is removed
if ( $.uiBackCompat === true ) {

// Backcompat for spinner html extension points
	$.widget( "ui.spinner", $.ui.spinner, {
		_enhance: function() {
			this.uiSpinner = this.element
				.attr( "autocomplete", "off" )
				.wrap( this._uiSpinnerHtml() )
				.parent()

// Add buttons
					.append( this._buttonHtml() );
		},
		_uiSpinnerHtml: function() {
			return "<span>";
		},

_buttonHtml: function() {
			return "<a></a><a></a>";
		}
	} );
}

return $.ui.spinner;

} );

Editing: spinner.js

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