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/*
 * jQuery UI Slider 1.8.5
 *
 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Slider
 *
 * Depends:
 *      jquery.ui.core.js
 *      jquery.ui.mouse.js
 *      jquery.ui.widget.js
 */
(function( $, undefined ) {

// number of pages in a slider
// (how many times can you page up/down to go through the whole range)
var numPages = 5;

$.widget( "ui.slider", $.ui.mouse, {

        widgetEventPrefix: "slide",

        options: {
                animate: false,
                distance: 0,
                max: 100,
                min: 0,
                orientation: "horizontal",
                range: false,
                step: 1,
                value: 0,
                values: null
        },

        _create: function() {
                var self = this,
                        o = this.options;

                this._keySliding = false;
                this._mouseSliding = false;
                this._animateOff = true;
                this._handleIndex = null;
                this._detectOrientation();
                this._mouseInit();

                this.element
                        .addClass( "ui-slider" +
                                " ui-slider-" + this.orientation +
                                " ui-widget" +
                                " ui-widget-content" +
                                " ui-corner-all" );
                
                if ( o.disabled ) {
                        this.element.addClass( "ui-slider-disabled ui-disabled" );
                }

                this.range = $([]);

                if ( o.range ) {
                        if ( o.range === true ) {
                                this.range = $( "<div></div>" );
                                if ( !o.values ) {
                                        o.values = [ this._valueMin(), this._valueMin() ];
                                }
                                if ( o.values.length && o.values.length !== 2 ) {
                                        o.values = [ o.values[0], o.values[0] ];
                                }
                        } else {
                                this.range = $( "<div></div>" );
                        }

                        this.range
                                .appendTo( this.element )
                                .addClass( "ui-slider-range" );

                        if ( o.range === "min" || o.range === "max" ) {
                                this.range.addClass( "ui-slider-range-" + o.range );
                        }

                        // note: this isn't the most fittingly semantic framework class for this element,
                        // but worked best visually with a variety of themes
                        this.range.addClass( "ui-widget-header" );
                }

                if ( $( ".ui-slider-handle", this.element ).length === 0 ) {
                        $( "<a href='#'></a>" )
                                .appendTo( this.element )
                                .addClass( "ui-slider-handle" );
                }

                if ( o.values && o.values.length ) {
                        while ( $(".ui-slider-handle", this.element).length < o.values.length ) {
                                $( "<a href='#'></a>" )
                                        .appendTo( this.element )
                                        .addClass( "ui-slider-handle" );
                        }
                }

                this.handles = $( ".ui-slider-handle", this.element )
                        .addClass( "ui-state-default" +
                                " ui-corner-all" );

                this.handle = this.handles.eq( 0 );

                this.handles.add( this.range ).filter( "a" )
                        .click(function( event ) {
                                event.preventDefault();
                        })
                        .hover(function() {
                                if ( !o.disabled ) {
                                        $( this ).addClass( "ui-state-hover" );
                                }
                        }, function() {
                                $( this ).removeClass( "ui-state-hover" );
                        })
                        .focus(function() {
                                if ( !o.disabled ) {
                                        $( ".ui-slider .ui-state-focus" ).removeClass( "ui-state-focus" );
                                        $( this ).addClass( "ui-state-focus" );
                                } else {
                                        $( this ).blur();
                                }
                        })
                        .blur(function() {
                                $( this ).removeClass( "ui-state-focus" );
                        });

                this.handles.each(function( i ) {
                        $( this ).data( "index.ui-slider-handle", i );
                });

                this.handles
                        .keydown(function( event ) {
                                var ret = true,
                                        index = $( this ).data( "index.ui-slider-handle" ),
                                        allowed,
                                        curVal,
                                        newVal,
                                        step;
        
                                if ( self.options.disabled ) {
                                        return;
                                }
        
                                switch ( event.keyCode ) {
                                        case $.ui.keyCode.HOME:
                                        case $.ui.keyCode.END:
                                        case $.ui.keyCode.PAGE_UP:
                                        case $.ui.keyCode.PAGE_DOWN:
                                        case $.ui.keyCode.UP:
                                        case $.ui.keyCode.RIGHT:
                                        case $.ui.keyCode.DOWN:
                                        case $.ui.keyCode.LEFT:
                                                ret = false;
                                                if ( !self._keySliding ) {
                                                        self._keySliding = true;
                                                        $( this ).addClass( "ui-state-active" );
                                                        allowed = self._start( event, index );
                                                        if ( allowed === false ) {
                                                                return;
                                                        }
                                                }
                                                break;
                                }
        
                                step = self.options.step;
                                if ( self.options.values && self.options.values.length ) {
                                        curVal = newVal = self.values( index );
                                } else {
                                        curVal = newVal = self.value();
                                }
        
                                switch ( event.keyCode ) {
                                        case $.ui.keyCode.HOME:
                                                newVal = self._valueMin();
                                                break;
                                        case $.ui.keyCode.END:
                                                newVal = self._valueMax();
                                                break;
                                        case $.ui.keyCode.PAGE_UP:
                                                newVal = self._trimAlignValue( curVal + ( (self._valueMax() - self._valueMin()) / numPages ) );
                                                break;
                                        case $.ui.keyCode.PAGE_DOWN:
                                                newVal = self._trimAlignValue( curVal - ( (self._valueMax() - self._valueMin()) / numPages ) );
                                                break;
                                        case $.ui.keyCode.UP:
                                        case $.ui.keyCode.RIGHT:
                                                if ( curVal === self._valueMax() ) {
                                                        return;
                                                }
                                                newVal = self._trimAlignValue( curVal + step );
                                                break;
                                        case $.ui.keyCode.DOWN:
                                        case $.ui.keyCode.LEFT:
                                                if ( curVal === self._valueMin() ) {
                                                        return;
                                                }
                                                newVal = self._trimAlignValue( curVal - step );
                                                break;
                                }
        
                                self._slide( event, index, newVal );
        
                                return ret;
        
                        })
                        .keyup(function( event ) {
                                var index = $( this ).data( "index.ui-slider-handle" );
        
                                if ( self._keySliding ) {
                                        self._keySliding = false;
                                        self._stop( event, index );
                                        self._change( event, index );
                                        $( this ).removeClass( "ui-state-active" );
                                }
        
                        });

                this._refreshValue();

                this._animateOff = false;
        },

        destroy: function() {
                this.handles.remove();
                this.range.remove();

                this.element
                        .removeClass( "ui-slider" +
                                " ui-slider-horizontal" +
                                " ui-slider-vertical" +
                                " ui-slider-disabled" +
                                " ui-widget" +
                                " ui-widget-content" +
                                " ui-corner-all" )
                        .removeData( "slider" )
                        .unbind( ".slider" );

                this._mouseDestroy();

                return this;
        },

        _mouseCapture: function( event ) {
                var o = this.options,
                        position,
                        normValue,
                        distance,
                        closestHandle,
                        self,
                        index,
                        allowed,
                        offset,
                        mouseOverHandle;

                if ( o.disabled ) {
                        return false;
                }

                this.elementSize = {
                        width: this.element.outerWidth(),
                        height: this.element.outerHeight()
                };
                this.elementOffset = this.element.offset();

                position = { x: event.pageX, y: event.pageY };
                normValue = this._normValueFromMouse( position );
                distance = this._valueMax() - this._valueMin() + 1;
                self = this;
                this.handles.each(function( i ) {
                        var thisDistance = Math.abs( normValue - self.values(i) );
                        if ( distance > thisDistance ) {
                                distance = thisDistance;
                                closestHandle = $( this );
                                index = i;
                        }
                });

                // workaround for bug #3736 (if both handles of a range are at 0,
                // the first is always used as the one with least distance,
                // and moving it is obviously prevented by preventing negative ranges)
                if( o.range === true && this.values(1) === o.min ) {
                        index += 1;
                        closestHandle = $( this.handles[index] );
                }

                allowed = this._start( event, index );
                if ( allowed === false ) {
                        return false;
                }
                this._mouseSliding = true;

                self._handleIndex = index;

                closestHandle
                        .addClass( "ui-state-active" )
                        .focus();
                
                offset = closestHandle.offset();
                mouseOverHandle = !$( event.target ).parents().andSelf().is( ".ui-slider-handle" );
                this._clickOffset = mouseOverHandle ? { left: 0, top: 0 } : {
                        left: event.pageX - offset.left - ( closestHandle.width() / 2 ),
                        top: event.pageY - offset.top -
                                ( closestHandle.height() / 2 ) -
                                ( parseInt( closestHandle.css("borderTopWidth"), 10 ) || 0 ) -
                                ( parseInt( closestHandle.css("borderBottomWidth"), 10 ) || 0) +
                                ( parseInt( closestHandle.css("marginTop"), 10 ) || 0)
                };

                this._slide( event, index, normValue );
                this._animateOff = true;
                return true;
        },

        _mouseStart: function( event ) {
                return true;
        },

        _mouseDrag: function( event ) {
                var position = { x: event.pageX, y: event.pageY },
                        normValue = this._normValueFromMouse( position );
                
                this._slide( event, this._handleIndex, normValue );

                return false;
        },

        _mouseStop: function( event ) {
                this.handles.removeClass( "ui-state-active" );
                this._mouseSliding = false;

                this._stop( event, this._handleIndex );
                this._change( event, this._handleIndex );

                this._handleIndex = null;
                this._clickOffset = null;
                this._animateOff = false;

                return false;
        },
        
        _detectOrientation: function() {
                this.orientation = ( this.options.orientation === "vertical" ) ? "vertical" : "horizontal";
        },

        _normValueFromMouse: function( position ) {
                var pixelTotal,
                        pixelMouse,
                        percentMouse,
                        valueTotal,
                        valueMouse;

                if ( this.orientation === "horizontal" ) {
                        pixelTotal = this.elementSize.width;
                        pixelMouse = position.x - this.elementOffset.left - ( this._clickOffset ? this._clickOffset.left : 0 );
                } else {
                        pixelTotal = this.elementSize.height;
                        pixelMouse = position.y - this.elementOffset.top - ( this._clickOffset ? this._clickOffset.top : 0 );
                }

                percentMouse = ( pixelMouse / pixelTotal );
                if ( percentMouse > 1 ) {
                        percentMouse = 1;
                }
                if ( percentMouse < 0 ) {
                        percentMouse = 0;
                }
                if ( this.orientation === "vertical" ) {
                        percentMouse = 1 - percentMouse;
                }

                valueTotal = this._valueMax() - this._valueMin();
                valueMouse = this._valueMin() + percentMouse * valueTotal;

                return this._trimAlignValue( valueMouse );
        },

        _start: function( event, index ) {
                var uiHash = {
                        handle: this.handles[ index ],
                        value: this.value()
                };
                if ( this.options.values && this.options.values.length ) {
                        uiHash.value = this.values( index );
                        uiHash.values = this.values();
                }
                return this._trigger( "start", event, uiHash );
        },

        _slide: function( event, index, newVal ) {
                var otherVal,
                        newValues,
                        allowed;

                if ( this.options.values && this.options.values.length ) {
                        otherVal = this.values( index ? 0 : 1 );

                        if ( ( this.options.values.length === 2 && this.options.range === true ) && 
                                        ( ( index === 0 && newVal > otherVal) || ( index === 1 && newVal < otherVal ) )
                                ) {
                                newVal = otherVal;
                        }

                        if ( newVal !== this.values( index ) ) {
                                newValues = this.values();
                                newValues[ index ] = newVal;
                                // A slide can be canceled by returning false from the slide callback
                                allowed = this._trigger( "slide", event, {
                                        handle: this.handles[ index ],
                                        value: newVal,
                                        values: newValues
                                } );
                                otherVal = this.values( index ? 0 : 1 );
                                if ( allowed !== false ) {
                                        this.values( index, newVal, true );
                                }
                        }
                } else {
                        if ( newVal !== this.value() ) {
                                // A slide can be canceled by returning false from the slide callback
                                allowed = this._trigger( "slide", event, {
                                        handle: this.handles[ index ],
                                        value: newVal
                                } );
                                if ( allowed !== false ) {
                                        this.value( newVal );
                                }
                        }
                }
        },

        _stop: function( event, index ) {
                var uiHash = {
                        handle: this.handles[ index ],
                        value: this.value()
                };
                if ( this.options.values && this.options.values.length ) {
                        uiHash.value = this.values( index );
                        uiHash.values = this.values();
                }

                this._trigger( "stop", event, uiHash );
        },

        _change: function( event, index ) {
                if ( !this._keySliding && !this._mouseSliding ) {
                        var uiHash = {
                                handle: this.handles[ index ],
                                value: this.value()
                        };
                        if ( this.options.values && this.options.values.length ) {
                                uiHash.value = this.values( index );
                                uiHash.values = this.values();
                        }

                        this._trigger( "change", event, uiHash );
                }
        },

        value: function( newValue ) {
                if ( arguments.length ) {
                        this.options.value = this._trimAlignValue( newValue );
                        this._refreshValue();
                        this._change( null, 0 );
                }

                return this._value();
        },

        values: function( index, newValue ) {
                var vals,
                        newValues,
                        i;

                if ( arguments.length > 1 ) {
                        this.options.values[ index ] = this._trimAlignValue( newValue );
                        this._refreshValue();
                        this._change( null, index );
                }

                if ( arguments.length ) {
                        if ( $.isArray( arguments[ 0 ] ) ) {
                                vals = this.options.values;
                                newValues = arguments[ 0 ];
                                for ( i = 0; i < vals.length; i += 1 ) {
                                        vals[ i ] = this._trimAlignValue( newValues[ i ] );
                                        this._change( null, i );
                                }
                                this._refreshValue();
                        } else {
                                if ( this.options.values && this.options.values.length ) {
                                        return this._values( index );
                                } else {
                                        return this.value();
                                }
                        }
                } else {
                        return this._values();
                }
        },

        _setOption: function( key, value ) {
                var i,
                        valsLength = 0;

                if ( $.isArray( this.options.values ) ) {
                        valsLength = this.options.values.length;
                }

                $.Widget.prototype._setOption.apply( this, arguments );

                switch ( key ) {
                        case "disabled":
                                if ( value ) {
                                        this.handles.filter( ".ui-state-focus" ).blur();
                                        this.handles.removeClass( "ui-state-hover" );
                                        this.handles.attr( "disabled", "disabled" );
                                        this.element.addClass( "ui-disabled" );
                                } else {
                                        this.handles.removeAttr( "disabled" );
                                        this.element.removeClass( "ui-disabled" );
                                }
                                break;
                        case "orientation":
                                this._detectOrientation();
                                this.element
                                        .removeClass( "ui-slider-horizontal ui-slider-vertical" )
                                        .addClass( "ui-slider-" + this.orientation );
                                this._refreshValue();
                                break;
                        case "value":
                                this._animateOff = true;
                                this._refreshValue();
                                this._change( null, 0 );
                                this._animateOff = false;
                                break;
                        case "values":
                                this._animateOff = true;
                                this._refreshValue();
                                for ( i = 0; i < valsLength; i += 1 ) {
                                        this._change( null, i );
                                }
                                this._animateOff = false;
                                break;
                }
        },

        //internal value getter
        // _value() returns value trimmed by min and max, aligned by step
        _value: function() {
                var val = this.options.value;
                val = this._trimAlignValue( val );

                return val;
        },

        //internal values getter
        // _values() returns array of values trimmed by min and max, aligned by step
        // _values( index ) returns single value trimmed by min and max, aligned by step
        _values: function( index ) {
                var val,
                        vals,
                        i;

                if ( arguments.length ) {
                        val = this.options.values[ index ];
                        val = this._trimAlignValue( val );

                        return val;
                } else {
                        // .slice() creates a copy of the array
                        // this copy gets trimmed by min and max and then returned
                        vals = this.options.values.slice();
                        for ( i = 0; i < vals.length; i+= 1) {
                                vals[ i ] = this._trimAlignValue( vals[ i ] );
                        }

                        return vals;
                }
        },
        
        // returns the step-aligned value that val is closest to, between (inclusive) min and max
        _trimAlignValue: function( val ) {
                if ( val < this._valueMin() ) {
                        return this._valueMin();
                }
                if ( val > this._valueMax() ) {
                        return this._valueMax();
                }
                var step = ( this.options.step > 0 ) ? this.options.step : 1,
                        valModStep = val % step,
                        alignValue = val - valModStep;

                if ( Math.abs(valModStep) * 2 >= step ) {
                        alignValue += ( valModStep > 0 ) ? step : ( -step );
                }

                // Since JavaScript has problems with large floats, round
                // the final value to 5 digits after the decimal point (see #4124)
                return parseFloat( alignValue.toFixed(5) );
        },

        _valueMin: function() {
                return this.options.min;
        },

        _valueMax: function() {
                return this.options.max;
        },
        
        _refreshValue: function() {
                var oRange = this.options.range,
                        o = this.options,
                        self = this,
                        animate = ( !this._animateOff ) ? o.animate : false,
                        valPercent,
                        _set = {},
                        lastValPercent,
                        value,
                        valueMin,
                        valueMax;

                if ( this.options.values && this.options.values.length ) {
                        this.handles.each(function( i, j ) {
                                valPercent = ( self.values(i) - self._valueMin() ) / ( self._valueMax() - self._valueMin() ) * 100;
                                _set[ self.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
                                $( this ).stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );
                                if ( self.options.range === true ) {
                                        if ( self.orientation === "horizontal" ) {
                                                if ( i === 0 ) {
                                                        self.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { left: valPercent + "%" }, o.animate );
                                                }
                                                if ( i === 1 ) {
                                                        self.range[ animate ? "animate" : "css" ]( { width: ( valPercent - lastValPercent ) + "%" }, { queue: false, duration: o.animate } );
                                                }
                                        } else {
                                                if ( i === 0 ) {
                                                        self.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { bottom: ( valPercent ) + "%" }, o.animate );
                                                }
                                                if ( i === 1 ) {
                                                        self.range[ animate ? "animate" : "css" ]( { height: ( valPercent - lastValPercent ) + "%" }, { queue: false, duration: o.animate } );
                                                }
                                        }
                                }
                                lastValPercent = valPercent;
                        });
                } else {
                        value = this.value();
                        valueMin = this._valueMin();
                        valueMax = this._valueMax();
                        valPercent = ( valueMax !== valueMin ) ?
                                        ( value - valueMin ) / ( valueMax - valueMin ) * 100 :
                                        0;
                        _set[ self.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
                        this.handle.stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );

                        if ( oRange === "min" && this.orientation === "horizontal" ) {
                                this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { width: valPercent + "%" }, o.animate );
                        }
                        if ( oRange === "max" && this.orientation === "horizontal" ) {
                                this.range[ animate ? "animate" : "css" ]( { width: ( 100 - valPercent ) + "%" }, { queue: false, duration: o.animate } );
                        }
                        if ( oRange === "min" && this.orientation === "vertical" ) {
                                this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { height: valPercent + "%" }, o.animate );
                        }
                        if ( oRange === "max" && this.orientation === "vertical" ) {
                                this.range[ animate ? "animate" : "css" ]( { height: ( 100 - valPercent ) + "%" }, { queue: false, duration: o.animate } );
                        }
                }
        }

});

$.extend( $.ui.slider, {
        version: "1.8.5"
});

}(jQuery));