/*! Iris Color Picker - v1.0.7 - 2014-11-28
* https://github.com/Automattic/Iris
* Copyright (c) 2014 Matt Wiebe; Licensed GPLv2 */
(function( $, undef ){
    var _html, nonGradientIE, gradientType, vendorPrefixes, _css, Iris, UA, isIE, IEVersion;

    _html = '<div class="iris-picker"><div class="iris-picker-inner"><div class="iris-square"><a class="iris-square-value" href="#"><span class="iris-square-handle ui-slider-handle"></span></a><div class="iris-square-inner iris-square-horiz"></div><div class="iris-square-inner iris-square-vert"></div></div><div class="iris-slider iris-strip"><div class="iris-slider-offset"></div></div></div></div>';
    _css = '.iris-picker{display:block;position:relative}.iris-picker,.iris-picker *{-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box}input+.iris-picker{margin-top:4px}.iris-error{background-color:#ffafaf}.iris-border{border-radius:3px;border:1px solid #aaa;width:200px;background-color:#fff}.iris-picker-inner{position:absolute;top:0;right:0;left:0;bottom:0}.iris-border .iris-picker-inner{top:10px;right:10px;left:10px;bottom:10px}.iris-picker .iris-square-inner{position:absolute;left:0;right:0;top:0;bottom:0}.iris-picker .iris-square,.iris-picker .iris-slider,.iris-picker .iris-square-inner,.iris-picker .iris-palette{border-radius:3px;box-shadow:inset 0 0 5px rgba(0,0,0,.4);height:100%;width:12.5%;float:left;margin-right:5%}.iris-picker .iris-square{width:76%;margin-right:10%;position:relative}.iris-picker .iris-square-inner{width:auto;margin:0}.iris-ie-9 .iris-square,.iris-ie-9 .iris-slider,.iris-ie-9 .iris-square-inner,.iris-ie-9 .iris-palette{box-shadow:none;border-radius:0}.iris-ie-9 .iris-square,.iris-ie-9 .iris-slider,.iris-ie-9 .iris-palette{outline:1px solid rgba(0,0,0,.1)}.iris-ie-lt9 .iris-square,.iris-ie-lt9 .iris-slider,.iris-ie-lt9 .iris-square-inner,.iris-ie-lt9 .iris-palette{outline:1px solid #aaa}.iris-ie-lt9 .iris-square .ui-slider-handle{outline:1px solid #aaa;background-color:#fff;-ms-filter:"alpha(Opacity=30)"}.iris-ie-lt9 .iris-square .iris-square-handle{background:0;border:3px solid #fff;-ms-filter:"alpha(Opacity=50)"}.iris-picker .iris-strip{margin-right:0;position:relative}.iris-picker .iris-strip .ui-slider-handle{position:absolute;background:0;margin:0;right:-3px;left:-3px;border:4px solid #aaa;border-width:4px 3px;width:auto;height:6px;border-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.2);opacity:.9;z-index:5;cursor:ns-resize}.iris-strip .ui-slider-handle:before{content:" ";position:absolute;left:-2px;right:-2px;top:-3px;bottom:-3px;border:2px solid #fff;border-radius:3px}.iris-picker .iris-slider-offset{position:absolute;top:11px;left:0;right:0;bottom:-3px;width:auto;height:auto;background:transparent;border:0;border-radius:0}.iris-picker .iris-square-handle{background:transparent;border:5px solid #aaa;border-radius:50%;border-color:rgba(128,128,128,.5);box-shadow:none;width:12px;height:12px;position:absolute;left:-10px;top:-10px;cursor:move;opacity:1;z-index:10}.iris-picker .ui-state-focus .iris-square-handle{opacity:.8}.iris-picker .iris-square-handle:hover{border-color:#999}.iris-picker .iris-square-value:focus .iris-square-handle{box-shadow:0 0 2px rgba(0,0,0,.75);opacity:.8}.iris-picker .iris-square-handle:hover::after{border-color:#fff}.iris-picker .iris-square-handle::after{position:absolute;bottom:-4px;right:-4px;left:-4px;top:-4px;border:3px solid #f9f9f9;border-color:rgba(255,255,255,.8);border-radius:50%;content:" "}.iris-picker .iris-square-value{width:8px;height:8px;position:absolute}.iris-ie-lt9 .iris-square-value,.iris-mozilla .iris-square-value{width:1px;height:1px}.iris-palette-container{position:absolute;bottom:0;left:0;margin:0;padding:0}.iris-border .iris-palette-container{left:10px;bottom:10px}.iris-picker .iris-palette{margin:0;cursor:pointer}.iris-square-handle,.ui-slider-handle{border:0;outline:0}';

    // Even IE9 dosen't support gradients. Elaborate sigh.
    UA = navigator.userAgent.toLowerCase();
    isIE = navigator.appName === 'Microsoft Internet Explorer';
    IEVersion = isIE ? parseFloat( UA.match( /msie ([0-9]{1,}[\.0-9]{0,})/ )[1] ) : 0;
    nonGradientIE = ( isIE && IEVersion < 10 );
    gradientType = false;

    // we don't bother with an unprefixed version, as it has a different syntax
    vendorPrefixes = [ '-moz-', '-webkit-', '-o-', '-ms-' ];

    // Bail for IE <= 7
    if ( nonGradientIE && IEVersion <= 7 ) {
        $.fn.iris = $.noop;
        $.support.iris = false;
        return;
    }

    $.support.iris = true;

    function testGradientType() {
        var el, base,
            bgImageString = 'backgroundImage';

        if ( nonGradientIE ) {
            gradientType = 'filter';
        }
        else {
            el = $( '<div id="iris-gradtest" />' );
            base = 'linear-gradient(top,#fff,#000)';
            $.each( vendorPrefixes, function( i, val ){
                el.css( bgImageString, val + base );
                if ( el.css( bgImageString ).match( 'gradient' ) ) {
                    gradientType = i;
                    return false;
                }
            });
            // check for legacy webkit gradient syntax
            if ( gradientType === false ) {
                el.css( 'background', '-webkit-gradient(linear,0% 0%,0% 100%,from(#fff),to(#000))' );
                if ( el.css( bgImageString ).match( 'gradient' ) ) {
                    gradientType = 'webkit';
                }
            }
            el.remove();
        }

    }

    /**
    * Only for CSS3 gradients. oldIE will use a separate function.
    *
    * Accepts as many color stops as necessary from 2nd arg on, or 2nd
    * arg can be an array of color stops
    *
    * @param  {string} origin Gradient origin - top or left, defaults to left.
    * @return {string}        Appropriate CSS3 gradient string for use in
    */
    function createGradient( origin, stops ) {
        origin = ( origin === 'top' ) ? 'top' : 'left';
        stops = $.isArray( stops ) ? stops : Array.prototype.slice.call( arguments, 1 );
        if ( gradientType === 'webkit' ) {
            return legacyWebkitGradient( origin, stops );
        } else {
            return vendorPrefixes[ gradientType ] + 'linear-gradient(' + origin + ', ' + stops.join(', ') + ')';
        }
    }

    /**
    * Stupid gradients for a stupid browser.
    */
    function stupidIEGradient( origin, stops ) {
        var type, self, lastIndex, filter, startPosProp, endPosProp, dimensionProp, template, html;

        origin = ( origin === 'top' ) ? 'top' : 'left';
        stops = $.isArray( stops ) ? stops : Array.prototype.slice.call( arguments, 1 );
        // 8 hex: AARRGGBB
        // GradientType: 0 vertical, 1 horizontal
        type = ( origin === 'top' ) ? 0 : 1;
        self = $( this );
        lastIndex = stops.length - 1;
        filter = 'filter';
        startPosProp = ( type === 1 ) ? 'left' : 'top';
        endPosProp = ( type === 1 ) ? 'right' : 'bottom';
        dimensionProp = ( type === 1 ) ? 'height' : 'width';
        template = '<div class="iris-ie-gradient-shim" style="position:absolute;' + dimensionProp + ':100%;' + startPosProp + ':%start%;' + endPosProp + ':%end%;' + filter + ':%filter%;" data-color:"%color%"></div>';
        html = '';
        // need a positioning context
        if ( self.css('position') === 'static' ) {
            self.css( {position: 'relative' } );
        }

        stops = fillColorStops( stops );
        $.each(stops, function( i, startColor ) {
            var endColor, endStop, filterVal;

            // we want two at a time. if we're on the last pair, bail.
            if ( i === lastIndex ) {
                return false;
            }

            endColor = stops[ i + 1 ];
            //if our pairs are at the same color stop, moving along.
            if ( startColor.stop === endColor.stop ) {
                return;
            }

            endStop = 100 - parseFloat( endColor.stop ) + '%';
            startColor.octoHex = new Color( startColor.color ).toIEOctoHex();
            endColor.octoHex = new Color( endColor.color ).toIEOctoHex();

            filterVal = 'progid:DXImageTransform.Microsoft.Gradient(GradientType=' + type + ', StartColorStr=\'' + startColor.octoHex + '\', EndColorStr=\'' + endColor.octoHex + '\')';
            html += template.replace( '%start%', startColor.stop ).replace( '%end%', endStop ).replace( '%filter%', filterVal );
        });
        self.find( '.iris-ie-gradient-shim' ).remove();
        $( html ).prependTo( self );
    }

    function legacyWebkitGradient( origin, colorList ) {
        var stops = [];
        origin = ( origin === 'top' ) ? '0% 0%,0% 100%,' : '0% 100%,100% 100%,';
        colorList = fillColorStops( colorList );
        $.each( colorList, function( i, val ){
            stops.push( 'color-stop(' + ( parseFloat( val.stop ) / 100 ) + ', ' + val.color + ')' );
        });
        return '-webkit-gradient(linear,' + origin + stops.join(',') + ')';
    }

    function fillColorStops( colorList ) {
        var colors = [],
            percs = [],
            newColorList = [],
            lastIndex = colorList.length - 1;

        $.each( colorList, function( index, val ) {
            var color = val,
                perc = false,
                match = val.match( /1?[0-9]{1,2}%$/ );

            if ( match ) {
                color = val.replace( /\s?1?[0-9]{1,2}%$/, '' );
                perc = match.shift();
            }
            colors.push( color );
            percs.push( perc );
        });

        // back fill first and last
        if ( percs[0] === false ) {
            percs[0] = '0%';
        }

        if ( percs[lastIndex] === false ) {
            percs[lastIndex] = '100%';
        }

        percs = backFillColorStops( percs );

        $.each( percs, function( i ){
            newColorList[i] = { color: colors[i], stop: percs[i] };
        });
        return newColorList;
    }

    function backFillColorStops( stops ) {
        var first = 0,
            last = stops.length - 1,
            i = 0,
            foundFirst = false,
            incr,
            steps,
            step,
            firstVal;

        if ( stops.length <= 2 || $.inArray( false, stops ) < 0 ) {
            return stops;
        }
        while ( i < stops.length - 1 ) {
            if ( ! foundFirst && stops[i] === false ) {
                first = i - 1;
                foundFirst = true;
            } else if ( foundFirst && stops[i] !== false ) {
                last = i;
                i = stops.length;
            }
            i++;
        }
        steps = last - first;
        firstVal = parseInt( stops[first].replace('%'), 10 );
        incr = ( parseFloat( stops[last].replace('%') ) - firstVal ) / steps;
        i = first + 1;
        step = 1;
        while ( i < last ) {
            stops[i] = ( firstVal + ( step * incr ) ) + '%';
            step++;
            i++;
        }
        return backFillColorStops( stops );
    }

    $.fn.gradient = function() {
        var args = arguments;
        return this.each( function() {
            // this'll be oldishIE
            if ( nonGradientIE ) {
                stupidIEGradient.apply( this, args );
            } else {
                // new hotness
                $( this ).css( 'backgroundImage', createGradient.apply( this, args ) );
            }
        });
    };

    $.fn.raninbowGradient = function( origin, args ) {
        var opts, template, i, steps;

        origin = origin || 'top';
        opts = $.extend( {}, { s: 100, l: 50 }, args );
        template = 'hsl(%h%,' + opts.s + '%,' + opts.l + '%)';
        i = 0;
        steps = [];
        while ( i <= 360 ) {
            steps.push( template.replace('%h%', i) );
            i += 30;
        }
        return this.each(function() {
            $(this).gradient( origin, steps );
        });
    };

    // the colorpicker widget def.
    Iris = {
        options: {
            color: false,
            mode: 'hsl',
            controls: {
                horiz: 's', // horizontal defaults to saturation
                vert: 'l', // vertical defaults to lightness
                strip: 'h' // right strip defaults to hue
            },
            hide: true, // hide the color picker by default
            border: true, // draw a border around the collection of UI elements
            target: false, // a DOM element / jQuery selector that the element will be appended within. Only used when called on an input.
            width: 200, // the width of the collection of UI elements
            palettes: false // show a palette of basic colors beneath the square.
        },
        _color: '',
        _palettes: [ '#000', '#fff', '#d33', '#d93', '#ee2', '#81d742', '#1e73be', '#8224e3' ],
        _inited: false,
        _defaultHSLControls: {
            horiz: 's',
            vert: 'l',
            strip: 'h'
        },
        _defaultHSVControls: {
            horiz: 'h',
            vert: 'v',
            strip: 's'
        },
        _scale: {
            h: 360,
            s: 100,
            l: 100,
            v: 100
        },
        _create: function() {
            var self = this,
                el = self.element,
                color = self.options.color || el.val();

            if ( gradientType === false ) {
                testGradientType();
            }

            if ( el.is( 'input' ) ) {
                if ( self.options.target ) {
                    self.picker = $( _html ).appendTo( self.options.target );
                } else {
                    self.picker = $( _html ).insertAfter( el );
                }

                self._addInputListeners( el );
            } else {
                el.append( _html );
                self.picker = el.find( '.iris-picker' );
            }

            // Browsers / Versions
            // Feature detection doesn't work for these, and $.browser is deprecated
            if ( isIE ) {
                if ( IEVersion === 9 ) {
                    self.picker.addClass( 'iris-ie-9' );
                } else if ( IEVersion <= 8 ) {
                    self.picker.addClass( 'iris-ie-lt9' );
                }
            } else if ( UA.indexOf('compatible') < 0 && UA.indexOf('khtml') < 0 && UA.match( /mozilla/ ) ) {
                self.picker.addClass( 'iris-mozilla' );
            }

            if ( self.options.palettes ) {
                self._addPalettes();
            }

            self._color = new Color( color ).setHSpace( self.options.mode );
            self.options.color = self._color.toString();

            // prep 'em for re-use
            self.controls = {
                square:      self.picker.find( '.iris-square' ),
                squareDrag:  self.picker.find( '.iris-square-value' ),
                horiz:       self.picker.find( '.iris-square-horiz' ),
                vert:        self.picker.find( '.iris-square-vert' ),
                strip:       self.picker.find( '.iris-strip' ),
                stripSlider: self.picker.find( '.iris-strip .iris-slider-offset' )
            };

            // small sanity check - if we chose hsv, change default controls away from hsl
            if ( self.options.mode === 'hsv' && self._has('l', self.options.controls) ) {
                self.options.controls = self._defaultHSVControls;
            } else if ( self.options.mode === 'hsl' && self._has('v', self.options.controls) ) {
                self.options.controls = self._defaultHSLControls;
            }

            // store it. HSL gets squirrely
            self.hue = self._color.h();

            if ( self.options.hide ) {
                self.picker.hide();
            }

            if ( self.options.border ) {
                self.picker.addClass( 'iris-border' );
            }

            self._initControls();
            self.active = 'external';
            self._dimensions();
            self._change();
        },
        _has: function(needle, haystack) {
            var ret = false;
            $.each(haystack, function(i,v){
                if ( needle === v ) {
                    ret = true;
                    // exit the loop
                    return false;
                }
            });
            return ret;
        },
        _addPalettes: function () {
            var container = $( '<div class="iris-palette-container" />' ),
                palette = $( '<a class="iris-palette" tabindex="0" />' ),
                colors = $.isArray( this.options.palettes ) ? this.options.palettes : this._palettes;

            // do we have an existing container? Empty and reuse it.
            if ( this.picker.find( '.iris-palette-container' ).length ) {
                container = this.picker.find( '.iris-palette-container' ).detach().html( '' );
            }

            $.each(colors, function(index, val) {
                palette.clone().data( 'color', val )
                    .css( 'backgroundColor', val ).appendTo( container )
                    .height( 10 ).width( 10 );
            });

            this.picker.append(container);
        },
        _paint: function() {
            var self = this;
            self._paintDimension( 'top', 'strip' );
            self._paintDimension( 'top', 'vert' );
            self._paintDimension( 'left', 'horiz' );
        },
        _paintDimension: function( origin, control ) {
            var self = this,
                c = self._color,
                mode = self.options.mode,
                color = self._getHSpaceColor(),
                target = self.controls[ control ],
                controlOpts = self.options.controls,
                stops;

            // don't paint the active control
            if ( control === self.active || ( self.active === 'square' && control !== 'strip' ) ) {
                return;
            }

            switch ( controlOpts[ control ] ) {
                case 'h':
                    if ( mode === 'hsv' ) {
                        color = c.clone();
                        switch ( control ) {
                            case 'horiz':
                                color[controlOpts.vert](100);
                                break;
                            case 'vert':
                                color[controlOpts.horiz](100);
                                break;
                            case 'strip':
                                color.setHSpace('hsl');
                                break;
                        }
                        stops = color.toHsl();
                    } else {
                        if ( control === 'strip' ) {
                            stops = { s: color.s, l: color.l };
                        } else {
                            stops = { s: 100, l: color.l };
                        }
                    }

                    target.raninbowGradient( origin, stops );
                    break;
                case 's':
                    if ( mode === 'hsv' ) {
                        if ( control === 'vert' ) {
                            stops = [ c.clone().a(0).s(0).toCSS('rgba'), c.clone().a(1).s(0).toCSS('rgba') ];
                        } else if ( control === 'strip' ) {
                            stops = [ c.clone().s(100).toCSS('hsl'), c.clone().s(0).toCSS('hsl') ];
                        } else if ( control === 'horiz' ) {
                            stops = [ '#fff', 'hsl(' + color.h + ',100%,50%)' ];
                        }
                    } else { // implicit mode === 'hsl'
                        if ( control === 'vert' && self.options.controls.horiz === 'h' ) {
                            stops = ['hsla(0, 0%, ' + color.l + '%, 0)', 'hsla(0, 0%, ' + color.l + '%, 1)'];
                        } else {
                            stops = ['hsl('+ color.h +',0%,50%)', 'hsl(' + color.h + ',100%,50%)'];
                        }
                    }


                    target.gradient( origin, stops );
                    break;
                case 'l':
                    if ( control === 'strip' ) {
                        stops = ['hsl(' + color.h + ',100%,100%)', 'hsl(' + color.h + ', ' + color.s + '%,50%)', 'hsl('+ color.h +',100%,0%)'];
                    } else {
                        stops = ['#fff', 'rgba(255,255,255,0) 50%', 'rgba(0,0,0,0) 50%', 'rgba(0,0,0,1)'];
                    }
                    target.gradient( origin, stops );
                    break;
                case 'v':
                        if ( control === 'strip' ) {
                            stops = [ c.clone().v(100).toCSS(), c.clone().v(0).toCSS() ];
                        } else {
                            stops = ['rgba(0,0,0,0)', '#000'];
                        }
                        target.gradient( origin, stops );
                    break;
                default:
                    break;
            }
        },

        _getHSpaceColor: function() {
            return ( this.options.mode === 'hsv' ) ? this._color.toHsv() : this._color.toHsl();
        },

        _dimensions: function( reset ) {
            // whatever size
            var self = this,
                opts = self.options,
                controls = self.controls,
                square = controls.square,
                strip = self.picker.find( '.iris-strip' ),
                squareWidth = '77.5%',
                stripWidth = '12%',
                totalPadding = 20,
                innerWidth = opts.border ? opts.width - totalPadding : opts.width,
                controlsHeight,
                paletteCount = $.isArray( opts.palettes ) ? opts.palettes.length : self._palettes.length,
                paletteMargin, paletteWidth, paletteContainerWidth;

            if ( reset ) {
                square.css( 'width', '' );
                strip.css( 'width', '' );
                self.picker.css( {width: '', height: ''} );
            }

            squareWidth = innerWidth * ( parseFloat( squareWidth ) / 100 );
            stripWidth = innerWidth * ( parseFloat( stripWidth ) / 100 );
            controlsHeight = opts.border ? squareWidth + totalPadding : squareWidth;

            square.width( squareWidth ).height( squareWidth );
            strip.height( squareWidth ).width( stripWidth );
            self.picker.css( { width: opts.width, height: controlsHeight } );

            if ( ! opts.palettes ) {
                return self.picker.css( 'paddingBottom', '' );
            }

            // single margin at 2%
            paletteMargin = squareWidth * 2 / 100;
            paletteContainerWidth = squareWidth - ( ( paletteCount - 1 ) * paletteMargin );
            paletteWidth = paletteContainerWidth / paletteCount;
            self.picker.find('.iris-palette').each( function( i ) {
                var margin = i === 0 ? 0 : paletteMargin;
                $( this ).css({
                    width: paletteWidth,
                    height: paletteWidth,
                    marginLeft: margin
                });
            });
            self.picker.css( 'paddingBottom', paletteWidth + paletteMargin );
            strip.height( paletteWidth + paletteMargin + squareWidth );
        },

        _addInputListeners: function( input ) {
            var self = this,
                debounceTimeout = 100,
                callback = function( event ){
                    var color = new Color( input.val() ),
                        val = input.val().replace( /^#/, '' );

                    input.removeClass( 'iris-error' );
                    // we gave a bad color
                    if ( color.error ) {
                        // don't error on an empty input - we want those allowed
                        if ( val !== '' ) {
                            input.addClass( 'iris-error' );
                        }
                    } else {
                        if ( color.toString() !== self._color.toString() ) {
                            // let's not do this on keyup for hex shortcodes
                            if ( ! ( event.type === 'keyup' && val.match( /^[0-9a-fA-F]{3}$/ ) ) ) {
                                self._setOption( 'color', color.toString() );
                            }
                        }
                    }
                };

            input.on( 'change', callback ).on( 'keyup', self._debounce( callback, debounceTimeout ) );

            // If we initialized hidden, show on first focus. The rest is up to you.
            if ( self.options.hide ) {
                input.one( 'focus', function() {
                    self.show();
                });
            }
        },

        _initControls: function() {
            var self = this,
                controls = self.controls,
                square = controls.square,
                controlOpts = self.options.controls,
                stripScale = self._scale[controlOpts.strip];

            controls.stripSlider.slider({
                orientation: 'vertical',
                max: stripScale,
                slide: function( event, ui ) {
                    self.active = 'strip';
                    // "reverse" for hue.
                    if ( controlOpts.strip === 'h' ) {
                        ui.value = stripScale - ui.value;
                    }

                    self._color[controlOpts.strip]( ui.value );
                    self._change.apply( self, arguments );
                }
            });

            controls.squareDrag.draggable({
                containment: controls.square.find( '.iris-square-inner' ),
                zIndex: 1000,
                cursor: 'move',
                drag: function( event, ui ) {
                    self._squareDrag( event, ui );
                },
                start: function() {
                    square.addClass( 'iris-dragging' );
                    $(this).addClass( 'ui-state-focus' );
                },
                stop: function() {
                    square.removeClass( 'iris-dragging' );
                    $(this).removeClass( 'ui-state-focus' );
                }
            }).on( 'mousedown mouseup', function( event ) {
                var focusClass = 'ui-state-focus';
                event.preventDefault();
                if (event.type === 'mousedown' ) {
                    self.picker.find( '.' + focusClass ).removeClass( focusClass ).blur();
                    $(this).addClass( focusClass ).focus();
                } else {
                    $(this).removeClass( focusClass );
                }
            }).on( 'keydown', function( event ) {
                var container = controls.square,
                    draggable = controls.squareDrag,
                    position = draggable.position(),
                    distance = self.options.width / 100; // Distance in pixels the draggable should be moved: 1 "stop"

                // make alt key go "10"
                if ( event.altKey ) {
                    distance *= 10;
                }

                // Reposition if one of the directional keys is pressed
                switch ( event.keyCode ) {
                    case 37: position.left -= distance; break; // Left
                    case 38: position.top  -= distance; break; // Up
                    case 39: position.left += distance; break; // Right
                    case 40: position.top  += distance; break; // Down
                    default: return true; // Exit and bubble
                }

                // Keep draggable within container
                position.left = Math.max( 0, Math.min( position.left, container.width() ) );
                position.top =  Math.max( 0, Math.min( position.top, container.height() ) );

                draggable.css(position);
                self._squareDrag( event, { position: position });
                event.preventDefault();
            });

            // allow clicking on the square to move there and keep dragging
            square.mousedown( function( event ) {
                var squareOffset, pos;
                // only left click
                if ( event.which !== 1 ) {
                    return;
                }

                // prevent bubbling from the handle: no infinite loops
                if ( ! $( event.target ).is( 'div' ) ) {
                    return;
                }

                squareOffset = self.controls.square.offset();
                pos = {
                        top: event.pageY - squareOffset.top,
                        left: event.pageX - squareOffset.left
                };
                event.preventDefault();
                self._squareDrag( event, { position: pos } );
                event.target = self.controls.squareDrag.get(0);
                self.controls.squareDrag.css( pos ).trigger( event );
            });

            // palettes
            if ( self.options.palettes ) {
                self._paletteListeners();
            }
        },

        _paletteListeners: function() {
            var self = this;
            self.picker.find('.iris-palette-container').on('click.palette', '.iris-palette', function() {
                self._color.fromCSS( $(this).data('color') );
                self.active = 'external';
                self._change();
            }).on( 'keydown.palette', '.iris-palette', function( event ) {
                if ( ! ( event.keyCode === 13 || event.keyCode === 32 ) ) {
                    return true;
                }
                event.stopPropagation();
                $( this ).click();
            });
        },

        _squareDrag: function( event, ui ) {
            var self = this,
                controlOpts = self.options.controls,
                dimensions = self._squareDimensions(),
                vertVal = Math.round( ( dimensions.h - ui.position.top ) / dimensions.h * self._scale[controlOpts.vert] ),
                horizVal = self._scale[controlOpts.horiz] - Math.round( ( dimensions.w - ui.position.left ) / dimensions.w * self._scale[controlOpts.horiz] );

            self._color[controlOpts.horiz]( horizVal )[controlOpts.vert]( vertVal );

            self.active = 'square';
            self._change.apply( self, arguments );
        },

        _setOption: function( key, value ) {
            var self = this,
                oldValue = self.options[key],
                doDimensions = false,
                hexLessColor,
                newColor,
                method;

            // ensure the new value is set. We can reset to oldValue if some check wasn't met.
            self.options[key] = value;

            switch(key) {
                case 'color':
                    // cast to string in case we have a number
                    value = '' + value;
                    hexLessColor = value.replace( /^#/, '' );
                    newColor = new Color( value ).setHSpace( self.options.mode );
                    if ( newColor.error ) {
                        self.options[key] = oldValue;
                    } else {
                        self._color = newColor;
                        self.options.color = self.options[key] = self._color.toString();
                        self.active = 'external';
                        self._change();
                    }
                    break;
                case 'palettes':
                    doDimensions = true;

                    if ( value ) {
                        self._addPalettes();
                    } else {
                        self.picker.find('.iris-palette-container').remove();
                    }

                    // do we need to add events?
                    if ( ! oldValue ) {
                        self._paletteListeners();
                    }
                    break;
                case 'width':
                    doDimensions = true;
                    break;
                case 'border':
                    doDimensions = true;
                    method = value ? 'addClass' : 'removeClass';
                    self.picker[method]('iris-border');
                    break;
                case 'mode':
                case 'controls':
                    // if nothing's changed, let's bail, since this causes re-rendering the whole widget
                    if ( oldValue === value ) {
                        return;
                    }

                    // we're using these poorly named variables because they're already scoped.
                    // method is the element that Iris was called on. oldValue will be the options
                    method = self.element;
                    oldValue = self.options;
                    oldValue.hide = ! self.picker.is( ':visible' );
                    self.destroy();
                    self.picker.remove();
                    return $(self.element).iris(oldValue);
            }

            // Do we need to recalc dimensions?
            if ( doDimensions ) {
                self._dimensions(true);
            }
        },

        _squareDimensions: function( forceRefresh ) {
            var square = this.controls.square,
                dimensions,
                control;

            if ( forceRefresh !== undef && square.data('dimensions') ) {
                return square.data('dimensions');
            }

            control = this.controls.squareDrag;
            dimensions = {
                w: square.width(),
                h: square.height()
            };
            square.data( 'dimensions', dimensions );
            return dimensions;
        },

        _isNonHueControl: function( active, type ) {
            if ( active === 'square' && this.options.controls.strip === 'h' ) {
                return true;
            } else if ( type === 'external' || ( type === 'h' && active === 'strip' ) ) {
                return false;
            }

            return true;
        },

        _change: function() {
            var self = this,
                controls = self.controls,
                color = self._getHSpaceColor(),
                actions = [ 'square', 'strip' ],
                controlOpts = self.options.controls,
                type = controlOpts[self.active] || 'external',
                oldHue = self.hue;

            if ( self.active === 'strip' ) {
                // take no action on any of the square sliders if we adjusted the strip
                actions = [];
            } else if ( self.active !== 'external' ) {
                // for non-strip, non-external, strip should never change
                actions.pop(); // conveniently the last item
            }

            $.each( actions, function(index, item) {
                var value, dimensions, cssObj;
                if ( item !== self.active ) {
                    switch ( item ) {
                        case 'strip':
                            // reverse for hue
                            value = ( controlOpts.strip === 'h' ) ? self._scale[controlOpts.strip] - color[controlOpts.strip] : color[controlOpts.strip];
                            controls.stripSlider.slider( 'value', value );
                            break;
                        case 'square':
                            dimensions = self._squareDimensions();
                            cssObj = {
                                left: color[controlOpts.horiz] / self._scale[controlOpts.horiz] * dimensions.w,
                                top: dimensions.h - ( color[controlOpts.vert] / self._scale[controlOpts.vert] * dimensions.h )
                            };

                            self.controls.squareDrag.css( cssObj );
                            break;
                    }
                }
            });

            // Ensure that we don't change hue if we triggered a hue reset
            if ( color.h !== oldHue && self._isNonHueControl( self.active, type ) ) {
                self._color.h(oldHue);
            }

            // store hue for repeating above check next time
            self.hue = self._color.h();

            self.options.color = self._color.toString();

            // only run after the first time
            if ( self._inited ) {
                self._trigger( 'change', { type: self.active }, { color: self._color } );
            }

            if ( self.element.is( ':input' ) && ! self._color.error ) {
                self.element.removeClass( 'iris-error' );
                if ( self.element.val() !== self._color.toString() ) {
                    self.element.val( self._color.toString() );
                }
            }

            self._paint();
            self._inited = true;
            self.active = false;
        },
        // taken from underscore.js _.debounce method
        _debounce: function( func, wait, immediate ) {
            var timeout, result;
            return function() {
                var context = this,
                    args = arguments,
                    later,
                    callNow;

                later = function() {
                    timeout = null;
                    if ( ! immediate) {
                        result = func.apply( context, args );
                    }
                };

                callNow = immediate && !timeout;
                clearTimeout( timeout );
                timeout = setTimeout( later, wait );
                if ( callNow ) {
                    result = func.apply( context, args );
                }
                return result;
            };
        },
        show: function() {
            this.picker.show();
        },
        hide: function() {
            this.picker.hide();
        },
        toggle: function() {
            this.picker.toggle();
        },
        color: function(newColor) {
            if ( newColor === true ) {
                return this._color.clone();
            } else if ( newColor === undef ) {
                return this._color.toString();
            }
            this.option('color', newColor);
        }
    };
    // initialize the widget
    $.widget( 'a8c.iris', Iris );
    // add CSS
    $( '<style id="iris-css">' + _css + '</style>' ).appendTo( 'head' );

}( jQuery ));
/*! Color.js - v0.9.11 - 2013-08-09
* https://github.com/Automattic/Color.js
* Copyright (c) 2013 Matt Wiebe; Licensed GPLv2 */
(function(global, undef) {

    var Color = function( color, type ) {
        if ( ! ( this instanceof Color ) )
            return new Color( color, type );

        return this._init( color, type );
    };

    Color.fn = Color.prototype = {
        _color: 0,
        _alpha: 1,
        error: false,
        // for preserving hue/sat in fromHsl().toHsl() flows
        _hsl: { h: 0, s: 0, l: 0 },
        // for preserving hue/sat in fromHsv().toHsv() flows
        _hsv: { h: 0, s: 0, v: 0 },
        // for setting hsl or hsv space - needed for .h() & .s() functions to function properly
        _hSpace: 'hsl',
        _init: function( color ) {
            var func = 'noop';
            switch ( typeof color ) {
                    case 'object':
                        // alpha?
                        if ( color.a !== undef )
                            this.a( color.a );
                        func = ( color.r !== undef ) ? 'fromRgb' :
                            ( color.l !== undef ) ? 'fromHsl' :
                            ( color.v !== undef ) ? 'fromHsv' : func;
                        return this[func]( color );
                    case 'string':
                        return this.fromCSS( color );
                    case 'number':
                        return this.fromInt( parseInt( color, 10 ) );
            }
            return this;
        },

        _error: function() {
            this.error = true;
            return this;
        },

        clone: function() {
            var newColor = new Color( this.toInt() ),
                copy = ['_alpha', '_hSpace', '_hsl', '_hsv', 'error'];
            for ( var i = copy.length - 1; i >= 0; i-- ) {
                newColor[ copy[i] ] = this[ copy[i] ];
            }
            return newColor;
        },

        setHSpace: function( space ) {
            this._hSpace = ( space === 'hsv' ) ? space : 'hsl';
            return this;
        },

        noop: function() {
            return this;
        },

        fromCSS: function( color ) {
            var list,
                leadingRE = /^(rgb|hs(l|v))a?\(/;
            this.error = false;

            // whitespace and semicolon trim
            color = color.replace(/^\s+/, '').replace(/\s+$/, '').replace(/;$/, '');

            if ( color.match(leadingRE) && color.match(/\)$/) ) {
                list = color.replace(/(\s|%)/g, '').replace(leadingRE, '').replace(/,?\);?$/, '').split(',');

                if ( list.length < 3 )
                    return this._error();

                if ( list.length === 4 ) {
                    this.a( parseFloat( list.pop() ) );
                    // error state has been set to true in .a() if we passed NaN
                    if ( this.error )
                        return this;
                }

                for (var i = list.length - 1; i >= 0; i--) {
                    list[i] = parseInt(list[i], 10);
                    if ( isNaN( list[i] ) )
                        return this._error();
                }

                if ( color.match(/^rgb/) ) {
                    return this.fromRgb( {
                        r: list[0],
                        g: list[1],
                        b: list[2]
                    } );
                } else if ( color.match(/^hsv/) ) {
                    return this.fromHsv( {
                        h: list[0],
                        s: list[1],
                        v: list[2]
                    } );
                } else {
                    return this.fromHsl( {
                        h: list[0],
                        s: list[1],
                        l: list[2]
                    } );
                }
            } else {
                // must be hex amirite?
                return this.fromHex( color );
            }
        },

        fromRgb: function( rgb, preserve ) {
            if ( typeof rgb !== 'object' || rgb.r === undef || rgb.g === undef || rgb.b === undef )
                return this._error();

            this.error = false;
            return this.fromInt( parseInt( ( rgb.r << 16 ) + ( rgb.g << 8 ) + rgb.b, 10 ), preserve );
        },

        fromHex: function( color ) {
            color = color.replace(/^#/, '').replace(/^0x/, '');
            if ( color.length === 3 ) {
                color = color[0] + color[0] + color[1] + color[1] + color[2] + color[2];
            }

            // rough error checking - this is where things go squirrely the most
            this.error = ! /^[0-9A-F]{6}$/i.test( color );
            return this.fromInt( parseInt( color, 16 ) );
        },

        fromHsl: function( hsl ) {
            var r, g, b, q, p, h, s, l;

            if ( typeof hsl !== 'object' || hsl.h === undef || hsl.s === undef || hsl.l === undef )
                return this._error();

            this._hsl = hsl; // store it
            this._hSpace = 'hsl'; // implicit
            h = hsl.h / 360; s = hsl.s / 100; l = hsl.l / 100;
            if ( s === 0 ) {
                r = g = b = l; // achromatic
            }
            else {
                q = l < 0.5 ? l * ( 1 + s ) : l + s - l * s;
                p = 2 * l - q;
                r = this.hue2rgb( p, q, h + 1/3 );
                g = this.hue2rgb( p, q, h );
                b = this.hue2rgb( p, q, h - 1/3 );
            }
            return this.fromRgb( {
                r: r * 255,
                g: g * 255,
                b: b * 255
            }, true ); // true preserves hue/sat
        },

        fromHsv: function( hsv ) {
            var h, s, v, r, g, b, i, f, p, q, t;
            if ( typeof hsv !== 'object' || hsv.h === undef || hsv.s === undef || hsv.v === undef )
                return this._error();

            this._hsv = hsv; // store it
            this._hSpace = 'hsv'; // implicit

            h = hsv.h / 360; s = hsv.s / 100; v = hsv.v / 100;
            i = Math.floor( h * 6 );
            f = h * 6 - i;
            p = v * ( 1 - s );
            q = v * ( 1 - f * s );
            t = v * ( 1 - ( 1 - f ) * s );

            switch( i % 6 ) {
                case 0:
                    r = v; g = t; b = p;
                    break;
                case 1:
                    r = q; g = v; b = p;
                    break;
                case 2:
                    r = p; g = v; b = t;
                    break;
                case 3:
                    r = p; g = q; b = v;
                    break;
                case 4:
                    r = t; g = p; b = v;
                    break;
                case 5:
                    r = v; g = p; b = q;
                    break;
            }

            return this.fromRgb( {
                r: r * 255,
                g: g * 255,
                b: b * 255
            }, true ); // true preserves hue/sat

        },
        // everything comes down to fromInt
        fromInt: function( color, preserve ) {
            this._color = parseInt( color, 10 );

            if ( isNaN( this._color ) )
                this._color = 0;

            // let's coerce things
            if ( this._color > 16777215 )
                this._color = 16777215;
            else if ( this._color < 0 )
                this._color = 0;

            // let's not do weird things
            if ( preserve === undef ) {
                this._hsv.h = this._hsv.s = this._hsl.h = this._hsl.s = 0;
            }
            // EVENT GOES HERE
            return this;
        },

        hue2rgb: function( p, q, t ) {
            if ( t < 0 ) {
                t += 1;
            }
            if ( t > 1 ) {
                t -= 1;
            }
            if ( t < 1/6 ) {
                return p + ( q - p ) * 6 * t;
            }
            if ( t < 1/2 ) {
                return q;
            }
            if ( t < 2/3 ) {
                return p + ( q - p ) * ( 2/3 - t ) * 6;
            }
            return p;
        },

        toString: function() {
            var hex = parseInt( this._color, 10 ).toString( 16 );
            if ( this.error )
                return '';
            // maybe left pad it
            if ( hex.length < 6 ) {
                for (var i = 6 - hex.length - 1; i >= 0; i--) {
                    hex = '0' + hex;
                }
            }
            return '#' + hex;
        },

        toCSS: function( type, alpha ) {
            type = type || 'hex';
            alpha = parseFloat( alpha || this._alpha );
            switch ( type ) {
                case 'rgb':
                case 'rgba':
                    var rgb = this.toRgb();
                    if ( alpha < 1 ) {
                        return "rgba( " + rgb.r + ", " + rgb.g + ", " + rgb.b + ", " + alpha + " )";
                    }
                    else {
                        return "rgb( " + rgb.r + ", " + rgb.g + ", " + rgb.b + " )";
                    }
                    break;
                case 'hsl':
                case 'hsla':
                    var hsl = this.toHsl();
                    if ( alpha < 1 ) {
                        return "hsla( " + hsl.h + ", " + hsl.s + "%, " + hsl.l + "%, " + alpha + " )";
                    }
                    else {
                        return "hsl( " + hsl.h + ", " + hsl.s + "%, " + hsl.l + "% )";
                    }
                    break;
                default:
                    return this.toString();
            }
        },

        toRgb: function() {
            return {
                r: 255 & ( this._color >> 16 ),
                g: 255 & ( this._color >> 8 ),
                b: 255 & ( this._color )
            };
        },

        toHsl: function() {
            var rgb = this.toRgb();
            var r = rgb.r / 255, g = rgb.g / 255, b = rgb.b / 255;
            var max = Math.max( r, g, b ), min = Math.min( r, g, b );
            var h, s, l = ( max + min ) / 2;

            if ( max === min ) {
                h = s = 0; // achromatic
            } else {
                var d = max - min;
                s = l > 0.5 ? d / ( 2 - max - min ) : d / ( max + min );
                switch ( max ) {
                    case r: h = ( g - b ) / d + ( g < b ? 6 : 0 );
                        break;
                    case g: h = ( b - r ) / d + 2;
                        break;
                    case b: h = ( r - g ) / d + 4;
                        break;
                }
                h /= 6;
            }

            // maintain hue & sat if we've been manipulating things in the HSL space.
            h = Math.round( h * 360 );
            if ( h === 0 && this._hsl.h !== h ) {
                h = this._hsl.h;
            }
            s = Math.round( s * 100 );
            if ( s === 0 && this._hsl.s ) {
                s = this._hsl.s;
            }

            return {
                h: h,
                s: s,
                l: Math.round( l * 100 )
            };

        },

        toHsv: function() {
            var rgb = this.toRgb();
            var r = rgb.r / 255, g = rgb.g / 255, b = rgb.b / 255;
            var max = Math.max( r, g, b ), min = Math.min( r, g, b );
            var h, s, v = max;
            var d = max - min;
            s = max === 0 ? 0 : d / max;

            if ( max === min ) {
                h = s = 0; // achromatic
            } else {
                switch( max ){
                    case r:
                        h = ( g - b ) / d + ( g < b ? 6 : 0 );
                        break;
                    case g:
                        h = ( b - r ) / d + 2;
                        break;
                    case b:
                        h = ( r - g ) / d + 4;
                        break;
                }
                h /= 6;
            }

            // maintain hue & sat if we've been manipulating things in the HSV space.
            h = Math.round( h * 360 );
            if ( h === 0 && this._hsv.h !== h ) {
                h = this._hsv.h;
            }
            s = Math.round( s * 100 );
            if ( s === 0 && this._hsv.s ) {
                s = this._hsv.s;
            }

            return {
                h: h,
                s: s,
                v: Math.round( v * 100 )
            };
        },

        toInt: function() {
            return this._color;
        },

        toIEOctoHex: function() {
            // AARRBBGG
            var hex = this.toString();
            var AA = parseInt( 255 * this._alpha, 10 ).toString(16);
            if ( AA.length === 1 ) {
                AA = '0' + AA;
            }
            return '#' + AA + hex.replace(/^#/, '' );
        },

        toLuminosity: function() {
            var rgb = this.toRgb();
            return 0.2126 * Math.pow( rgb.r / 255, 2.2 ) + 0.7152 * Math.pow( rgb.g / 255, 2.2 ) + 0.0722 * Math.pow( rgb.b / 255, 2.2);
        },

        getDistanceLuminosityFrom: function( color ) {
            if ( ! ( color instanceof Color ) ) {
                throw 'getDistanceLuminosityFrom requires a Color object';
            }
            var lum1 = this.toLuminosity();
            var lum2 = color.toLuminosity();
            if ( lum1 > lum2 ) {
                return ( lum1 + 0.05 ) / ( lum2 + 0.05 );
            }
            else {
                return ( lum2 + 0.05 ) / ( lum1 + 0.05 );
            }
        },

        getMaxContrastColor: function() {
            var lum = this.toLuminosity();
            var hex = ( lum >= 0.5 ) ? '000000' : 'ffffff';
            return new Color( hex );
        },

        getReadableContrastingColor: function( bgColor, minContrast ) {
            if ( ! bgColor instanceof Color ) {
                return this;
            }

            // you shouldn't use less than 5, but you might want to.
            var targetContrast = ( minContrast === undef ) ? 5 : minContrast;
            // working things
            var contrast = bgColor.getDistanceLuminosityFrom( this );
            var maxContrastColor = bgColor.getMaxContrastColor();
            var maxContrast = maxContrastColor.getDistanceLuminosityFrom( bgColor );

            // if current max contrast is less than the target contrast, we had wishful thinking.
            // still, go max
            if ( maxContrast <= targetContrast ) {
                return maxContrastColor;
            }
            // or, we might already have sufficient contrast
            else if ( contrast >= targetContrast ) {
                return this;
            }

            var incr = ( 0 === maxContrastColor.toInt() ) ? -1 : 1;
            while ( contrast < targetContrast ) {
                this.l( incr, true ); // 2nd arg turns this into an incrementer
                contrast = this.getDistanceLuminosityFrom( bgColor );
                // infininite loop prevention: you never know.
                if ( this._color === 0 || this._color === 16777215 ) {
                    break;
                }
            }

            return this;

        },

        a: function( val ) {
            if ( val === undef )
                return this._alpha;

            var a = parseFloat( val );

            if ( isNaN( a ) )
                return this._error();

            this._alpha = a;
            return this;
        },

        // TRANSFORMS

        darken: function( amount ) {
            amount = amount || 5;
            return this.l( - amount, true );
        },

        lighten: function( amount ) {
            amount = amount || 5;
            return this.l( amount, true );
        },

        saturate: function( amount ) {
            amount = amount || 15;
            return this.s( amount, true );
        },

        desaturate: function( amount ) {
            amount = amount || 15;
            return this.s( - amount, true );
        },

        toGrayscale: function() {
            return this.setHSpace('hsl').s( 0 );
        },

        getComplement: function() {
            return this.h( 180, true );
        },

        getSplitComplement: function( step ) {
            step = step || 1;
            var incr = 180 + ( step * 30 );
            return this.h( incr, true );
        },

        getAnalog: function( step ) {
            step = step || 1;
            var incr = step * 30;
            return this.h( incr, true );
        },

        getTetrad: function( step ) {
            step = step || 1;
            var incr = step * 60;
            return this.h( incr, true );
        },

        getTriad: function( step ) {
            step = step || 1;
            var incr = step * 120;
            return this.h( incr, true );
        },

        _partial: function( key ) {
            var prop = shortProps[key];
            return function( val, incr ) {
                var color = this._spaceFunc('to', prop.space);

                // GETTER
                if ( val === undef )
                    return color[key];

                // INCREMENT
                if ( incr === true )
                    val = color[key] + val;

                // MOD & RANGE
                if ( prop.mod )
                    val = val % prop.mod;
                if ( prop.range )
                    val = ( val < prop.range[0] ) ? prop.range[0] : ( val > prop.range[1] ) ? prop.range[1] : val;

                // NEW VALUE
                color[key] = val;

                return this._spaceFunc('from', prop.space, color);
            };
        },

        _spaceFunc: function( dir, s, val ) {
            var space = s || this._hSpace,
                funcName = dir + space.charAt(0).toUpperCase() + space.substr(1);
            return this[funcName](val);
        }
    };

    var shortProps = {
        h: {
            mod: 360
        },
        s: {
            range: [0,100]
        },
        l: {
            space: 'hsl',
            range: [0,100]
        },
        v: {
            space: 'hsv',
            range: [0,100]
        },
        r: {
            space: 'rgb',
            range: [0,255]
        },
        g: {
            space: 'rgb',
            range: [0,255]
        },
        b: {
            space: 'rgb',
            range: [0,255]
        }
    };

    for ( var key in shortProps ) {
        if ( shortProps.hasOwnProperty( key ) )
            Color.fn[key] = Color.fn._partial(key);
    }

    // play nicely with Node + browser
    if ( typeof exports === 'object' )
        module.exports = Color;
    else
        global.Color = Color;

}(this));