// Spectrum Colorpicker v1.2.0
// https://github.com/bgrins/spectrum
// Author: Brian Grinstead
// License: MIT

(function (window, $, undefined) {
    var defaultOpts = {

        // Callbacks
        beforeShow: noop,
        move: noop,
        change: noop,
        show: noop,
        hide: noop,

        // Options
        color: false,
        flat: false,
        showInput: false,
        allowEmpty: false,
        showButtons: true,
        clickoutFiresChange: false,
        showInitial: false,
        showPalette: false,
        showPaletteOnly: false,
        showSelectionPalette: true,
        localStorageKey: false,
        appendTo: "body",
        maxSelectionSize: 7,
        cancelText: "cancel",
        chooseText: "choose",
        preferredFormat: false,
        className: "",
        showAlpha: false,
        theme: "sp-light",
        palette: ['fff', '000'],
        selectionPalette: [],
        disabled: false
    },
    spectrums = [],
    IE = !!/msie/i.exec( window.navigator.userAgent ),
    rgbaSupport = (function() {
        function contains( str, substr ) {
            return !!~('' + str).indexOf(substr);
        }

        var elem = document.createElement('div');
        var style = elem.style;
        style.cssText = 'background-color:rgba(0,0,0,.5)';
        return contains(style.backgroundColor, 'rgba') || contains(style.backgroundColor, 'hsla');
    })(),
    inputTypeColorSupport = (function() {
        var colorInput = $("<input type='color' value='!' />")[0];
        return colorInput.type === "color" && colorInput.value !== "!";
    })(),
    replaceInput = [
        "<div class='sp-replacer'>",
            "<div class='sp-preview'><div class='sp-preview-inner'></div></div>",
            "<div class='sp-dd'>&#9660;</div>",
        "</div>"
    ].join(''),
    markup = (function () {

        // IE does not support gradients with multiple stops, so we need to simulate
        //  that for the rainbow slider with 8 divs that each have a single gradient
        var gradientFix = "";
        if (IE) {
            for (var i = 1; i <= 6; i++) {
                gradientFix += "<div class='sp-" + i + "'></div>";
            }
        }

		return [
			"<div class='sp-container sp-hidden'>",
				"<div class='sp-arrow'></div>",
				"<div class='sp-palette-container'>",
					"<div class='sp-palette sp-thumb sp-cf'></div>",
				"</div>",
				"<div class='sp-picker-container'>",
					"<div class='sp-top sp-cf'>",
						"<div class='sp-fill'></div>",
						"<div class='sp-top-inner'>",
							"<div class='sp-color'>",
								"<div class='sp-sat'>",
									"<div class='sp-val'>",
										"<div class='sp-dragger'></div>",
									"</div>",
								"</div>",
							"</div>",
							"<div class='sp-clear sp-clear-display' title='Clear Color Selection'>",
							"</div>",
							"<div class='sp-hue'>",
								"<div class='sp-slider'></div>",
								gradientFix,
							"</div>",
						"</div>",
						"<div class='sp-alpha'><div class='sp-alpha-inner'><div class='sp-alpha-handle'></div></div></div>",
					"</div>",
					"<div class='sp-input-container sp-cf'>",
						"<input class='sp-input' type='text' spellcheck='false'  />",
						"<img data-type='invalidColor' style='margin-top: 1px;margin-left: -20px;display: inline;vertical-align: top;' src='images/error_b.svg' alt='invalid'>",
					"</div>",
					"<div class='sp-initial sp-thumb sp-cf'></div>",
					"<div class='sp-button-container sp-cf'>",
						"<input type='button' class='sp-choose' />",
						"<input type='button' class='sp-cancel' />",
					"</div>",
				"</div>",
			"</div>"
		].join("");
	})();

    function paletteTemplate (p, color, className) {
        var html = [];
        for (var i = 0; i < p.length; i++) {
            var current = p[i];
            if(current) {
                var tiny = tinycolor(current);
                var c = tiny.toHsl().l < 0.5 ? "sp-thumb-el sp-thumb-dark" : "sp-thumb-el sp-thumb-light";
                c += (tinycolor.equals(color, current)) ? " sp-thumb-active" : "";

                var swatchStyle = rgbaSupport ? ("background-color:" + tiny.toRgbString()) : "filter:" + tiny.toFilter();
                html.push('<span title="' + tiny.toRgbString() + '" data-color="' + tiny.toRgbString() + '" class="' + c + '"><span class="sp-thumb-inner" style="' + swatchStyle + ';" /></span>');
            } else {
                var cls = 'sp-clear-display';
                html.push('<span title="No Color Selected" data-color="" style="background-color:transparent;" class="' + cls + '"></span>');
            }
        }
        return "<div class='sp-cf " + className + "'>" + html.join('') + "</div>";
    }

    function hideAll() {
        for (var i = 0; i < spectrums.length; i++) {
            if (spectrums[i]) {
                spectrums[i].hide();
            }
        }
    }

    function instanceOptions(o, callbackContext) {
        var opts = $.extend({}, defaultOpts, o);
        opts.callbacks = {
            'move': bind(opts.move, callbackContext),
            'change': bind(opts.change, callbackContext),
            'show': bind(opts.show, callbackContext),
            'hide': bind(opts.hide, callbackContext),
            'beforeShow': bind(opts.beforeShow, callbackContext)
        };

        return opts;
    }

    function spectrum(element, o) {

        var opts = instanceOptions(o, element),
            flat = opts.flat,
            showSelectionPalette = opts.showSelectionPalette,
            localStorageKey = opts.localStorageKey,
            theme = opts.theme,
            callbacks = opts.callbacks,
            resize = throttle(reflow, 10),
            visible = false,
            dragWidth = 0,
            dragHeight = 0,
            dragHelperHeight = 0,
            slideHeight = 0,
            slideWidth = 0,
            alphaWidth = 0,
            alphaSlideHelperWidth = 0,
            slideHelperHeight = 0,
            currentHue = 0,
            currentSaturation = 0,
            currentValue = 0,
            currentAlpha = 1,
            palette = opts.palette.slice(0),
            paletteArray = $.isArray(palette[0]) ? palette : [palette],
            selectionPalette = opts.selectionPalette.slice(0),
            maxSelectionSize = opts.maxSelectionSize,
            draggingClass = "sp-dragging",
            shiftMovementDirection = null;

        var doc = element.ownerDocument,
            body = doc.body,
            boundElement = $(element),
            disabled = false,
            container = $(markup, doc).addClass(theme),
            dragger = container.find(".sp-color"),
            dragHelper = container.find(".sp-dragger"),
            slider = container.find(".sp-hue"),
            slideHelper = container.find(".sp-slider"),
            alphaSliderInner = container.find(".sp-alpha-inner"),
            alphaSlider = container.find(".sp-alpha"),
            alphaSlideHelper = container.find(".sp-alpha-handle"),
            textInput = container.find(".sp-input"),
			invalidImage = container.find('img[data-type="invalidColor"]'),
            paletteContainer = container.find(".sp-palette"),
            initialColorContainer = container.find(".sp-initial"),
            cancelButton = container.find(".sp-cancel"),
            clearButton = container.find(".sp-clear"),
            chooseButton = container.find(".sp-choose"),
            isInput = boundElement.is("input"),
            isInputTypeColor = isInput && inputTypeColorSupport && boundElement.attr("type") === "color",
            shouldReplace = isInput && !flat,
            replacer = (shouldReplace) ? $(replaceInput).addClass(theme).addClass(opts.className) : $([]),
            offsetElement = (shouldReplace) ? replacer : boundElement,
            previewElement = replacer.find(".sp-preview-inner"),
            initialColor = opts.color || (isInput && boundElement.val()),
            colorOnShow = false,
            preferredFormat = opts.preferredFormat,
            currentPreferredFormat = preferredFormat,
            clickoutFiresChange = !opts.showButtons || opts.clickoutFiresChange,
            isEmpty = !initialColor,
            allowEmpty = opts.allowEmpty && !isInputTypeColor;

        function applyOptions() {

            if (opts.showPaletteOnly) {
                opts.showPalette = true;
            }

            container.toggleClass("sp-flat", flat);
            container.toggleClass("sp-input-disabled", !opts.showInput);
            container.toggleClass("sp-alpha-enabled", opts.showAlpha);
            container.toggleClass("sp-clear-enabled", allowEmpty);
            container.toggleClass("sp-buttons-disabled", !opts.showButtons);
            container.toggleClass("sp-palette-disabled", !opts.showPalette);
            container.toggleClass("sp-palette-only", opts.showPaletteOnly);
            container.toggleClass("sp-initial-disabled", !opts.showInitial);
            container.addClass(opts.className);

            reflow();
        }

        function initialize() {

            if (IE) {
                container.find("*:not(input)").attr("unselectable", "on");
            }

            applyOptions();

            if (shouldReplace) {
                boundElement.after(replacer).hide();
            }

            if (!allowEmpty) {
                clearButton.hide();
            }

            if (flat) {
                boundElement.after(container).hide();
            }
            else {

                var appendTo = opts.appendTo === "parent" ? boundElement.parent() : $(opts.appendTo);
                if (appendTo.length !== 1) {
                    appendTo = $("body");
                }

                appendTo.append(container);
            }

            if (localStorageKey && window.localStorage) {

                // Migrate old palettes over to new format.  May want to remove this eventually.
                try {
                    var oldPalette = window.localStorage[localStorageKey].split(",#");
                    if (oldPalette.length > 1) {
                        delete window.localStorage[localStorageKey];
                        $.each(oldPalette, function(i, c) {
                             addColorToSelectionPalette(c);
                        });
                    }
                }
                catch(e) { }

                try {
                    selectionPalette = window.localStorage[localStorageKey].split(";");
                }
                catch (e) { }
            }

            offsetElement.bind("click.spectrum touchstart.spectrum", function (e) {
                if (!disabled) {
                    toggle();
                }

                e.stopPropagation();

                if (!$(e.target).is("input")) {
                    e.preventDefault();
                }
            });

            if(boundElement.is(":disabled") || (opts.disabled === true)) {
                disable();
            }

            // Prevent clicks from bubbling up to document.  This would cause it to be hidden.
            container.click(stopPropagation);

            // Handle user typed input
            textInput.change(setFromTextInput);
            textInput.bind("paste", function () {
                setTimeout(setFromTextInput, 1);
            });
            textInput.keydown(function (e) { if (e.keyCode == 13) { setFromTextInput(); } });

            cancelButton.val(opts.cancelText);
            cancelButton.bind("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();
                hide("cancel");
            });


            clearButton.bind("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();

               isEmpty = true;

                move();
                if(flat) {
                    //for the flat style, this is a change event
                    updateOriginalInput(true);
                }
            });


            chooseButton.val(opts.chooseText);
            chooseButton.bind("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();

                if (isValid()) {
                    updateOriginalInput(true);
                    hide();
                }
            });

            draggable(alphaSlider, function (dragX, dragY, e) {
                currentAlpha = (dragX / alphaWidth);
                isEmpty = false;
                if (e.shiftKey) {
                    currentAlpha = Math.round(currentAlpha * 10) / 10;
                }

                move();
            });

            draggable(slider, function (dragX, dragY) {
                currentHue = parseFloat(dragY / slideHeight);
                isEmpty = false;
                move();
            }, dragStart, dragStop);

            draggable(dragger, function (dragX, dragY, e) {

                // shift+drag should snap the movement to either the x or y axis.
                if (!e.shiftKey) {
                    shiftMovementDirection = null;
                }
                else if (!shiftMovementDirection) {
                    var oldDragX = currentSaturation * dragWidth;
                    var oldDragY = dragHeight - (currentValue * dragHeight);
                    var furtherFromX = Math.abs(dragX - oldDragX) > Math.abs(dragY - oldDragY);

                    shiftMovementDirection = furtherFromX ? "x" : "y";
                }

                var setSaturation = !shiftMovementDirection || shiftMovementDirection === "x";
                var setValue = !shiftMovementDirection || shiftMovementDirection === "y";

                if (setSaturation) {
                    currentSaturation = parseFloat(dragX / dragWidth);
                }
                if (setValue) {
                    currentValue = parseFloat((dragHeight - dragY) / dragHeight);
                }

                isEmpty = false;

                move();

            }, dragStart, dragStop);

            if (!!initialColor) {
                set(initialColor);

                // In case color was black - update the preview UI and set the format
                // since the set function will not run (default color is black).
                updateUI();
                currentPreferredFormat = preferredFormat || tinycolor(initialColor).format;

                addColorToSelectionPalette(initialColor);
            }
            else {
                updateUI();
            }

            if (flat) {
                show();
            }

            function palletElementClick(e) {
                if (e.data && e.data.ignore) {
                    set($(this).data("color"));
                    move();
                }
                else {
                    set($(this).data("color"));
                    updateOriginalInput(true);
                    move();
                    hide();
                }

                return false;
            }

            var paletteEvent = IE ? "mousedown.spectrum" : "click.spectrum touchstart.spectrum";
            paletteContainer.delegate(".sp-thumb-el", paletteEvent, palletElementClick);
            initialColorContainer.delegate(".sp-thumb-el:nth-child(1)", paletteEvent, { ignore: true }, palletElementClick);
        }

        function addColorToSelectionPalette(color) {
            if (showSelectionPalette) {
                var colorRgb = tinycolor(color).toRgbString();
                if ($.inArray(colorRgb, selectionPalette) === -1) {
                    selectionPalette.push(colorRgb);
                    while(selectionPalette.length > maxSelectionSize) {
                        selectionPalette.shift();
                    }
                }

                if (localStorageKey && window.localStorage) {
                    try {
                        window.localStorage[localStorageKey] = selectionPalette.join(";");
                    }
                    catch(e) { }
                }
            }
        }

        function getUniqueSelectionPalette() {
            var unique = [];
            var p = selectionPalette;
            var paletteLookup = {};
            var rgb;

            if (opts.showPalette) {

                for (var i = 0; i < paletteArray.length; i++) {
                    for (var j = 0; j < paletteArray[i].length; j++) {
                        rgb = tinycolor(paletteArray[i][j]).toRgbString();
                        paletteLookup[rgb] = true;
                    }
                }

                for (i = 0; i < p.length; i++) {
                    rgb = tinycolor(p[i]).toRgbString();

                    if (!paletteLookup.hasOwnProperty(rgb)) {
                        unique.push(p[i]);
                        paletteLookup[rgb] = true;
                    }
                }
            }

            return unique.reverse().slice(0, opts.maxSelectionSize);
        }

        function drawPalette() {

            var currentColor = get();

            var html = $.map(paletteArray, function (palette, i) {
                return paletteTemplate(palette, currentColor, "sp-palette-row sp-palette-row-" + i);
            });

            if (selectionPalette) {
                html.push(paletteTemplate(getUniqueSelectionPalette(), currentColor, "sp-palette-row sp-palette-row-selection"));
            }

            paletteContainer.html(html.join(""));
        }

        function drawInitial() {
            if (opts.showInitial) {
                var initial = colorOnShow;
                var current = get();
                initialColorContainer.html(paletteTemplate([initial, current], current, "sp-palette-row-initial"));
            }
        }

        function dragStart() {
            if (dragHeight <= 0 || dragWidth <= 0 || slideHeight <= 0) {
                reflow();
            }
            container.addClass(draggingClass);
            shiftMovementDirection = null;
        }

        function dragStop() {
            container.removeClass(draggingClass);
        }

        function setFromTextInput() {

            var value = textInput.val();

            if ((value === null || value === "") && allowEmpty) {
                set(null);
            }
            else {
                var tiny = tinycolor(value);
                if (tiny.ok) {
                    set(tiny);
                }
                else {
					textInput.addClass("sp-validation-error");
					invalidImage.css('display','inline');
                }
            }
        }

        function toggle() {
            if (visible) {
                hide();
            }
            else {
                show();
            }
        }

        function show() {
            var event = $.Event('beforeShow.spectrum');

            if (visible) {
                reflow();
                return;
            }

            boundElement.trigger(event, [ get() ]);

            if (callbacks.beforeShow(get()) === false || event.isDefaultPrevented()) {
                return;
            }

            hideAll();
            visible = true;

            $(doc).bind("click.spectrum", hide);
            $(window).bind("resize.spectrum", resize);
            replacer.addClass("sp-active");
            container.removeClass("sp-hidden");

            if (opts.showPalette) {
                drawPalette();
            }
            reflow();
            updateUI();

            colorOnShow = get();

            drawInitial();
            callbacks.show(colorOnShow);
            boundElement.trigger('show.spectrum', [ colorOnShow ]);
        }

        function hide(e) {

            // Return on right click
            if (e && e.type == "click" && e.button == 2) { return; }

            // Return if hiding is unnecessary
            if (!visible || flat) { return; }
            visible = false;

            $(doc).unbind("click.spectrum", hide);
            $(window).unbind("resize.spectrum", resize);

            replacer.removeClass("sp-active");
            container.addClass("sp-hidden");

            var colorHasChanged = !tinycolor.equals(get(), colorOnShow);

            if (colorHasChanged) {
                if (clickoutFiresChange && e !== "cancel") {
                    updateOriginalInput(true);
                }
                else {
                    revert();
                }
            }

            callbacks.hide(get());
            boundElement.trigger('hide.spectrum', [ get() ]);
        }

        function revert() {
            set(colorOnShow, true);
        }

        function set(color, ignoreFormatChange) {
            if (tinycolor.equals(color, get())) {
                return;
            }

            var newColor;
            if (!color && allowEmpty) {
                isEmpty = true;
            } else {
                isEmpty = false;
                newColor = tinycolor(color);
                var newHsv = newColor.toHsv();

                currentHue = (newHsv.h % 360) / 360;
                currentSaturation = newHsv.s;
                currentValue = newHsv.v;
                currentAlpha = newHsv.a;
            }
            updateUI();

            if (newColor && newColor.ok && !ignoreFormatChange) {
                currentPreferredFormat = preferredFormat || newColor.format;
            }
        }

        function get(opts) {
            opts = opts || { };

            if (allowEmpty && isEmpty) {
                return null;
            }

            return tinycolor.fromRatio({
                h: currentHue,
                s: currentSaturation,
                v: currentValue,
                a: Math.round(currentAlpha * 100) / 100
            }, { format: opts.format || currentPreferredFormat });
        }

        function isValid() {
            return !textInput.hasClass("sp-validation-error");
        }

        function move() {
            updateUI();

            callbacks.move(get());
            boundElement.trigger('move.spectrum', [ get() ]);
        }

        function updateUI() {

			textInput.removeClass("sp-validation-error");
			invalidImage.css('display','none');

            updateHelperLocations();

            // Update dragger background color (gradients take care of saturation and value).
            var flatColor = tinycolor.fromRatio({ h: currentHue, s: 1, v: 1 });
            dragger.css("background-color", flatColor.toHexString());

            // Get a format that alpha will be included in (hex and names ignore alpha)
            var format = currentPreferredFormat;
            if (currentAlpha < 1) {
                if (format === "hex" || format === "hex3" || format === "hex6" || format === "name") {
                    format = "rgb";
                }
            }

            var realColor = get({ format: format }),
                displayColor = '';

             //reset background info for preview element
            previewElement.removeClass("sp-clear-display");
            previewElement.css('background-color', 'transparent');

            if (!realColor && allowEmpty) {
                // Update the replaced elements background with icon indicating no color selection
                previewElement.addClass("sp-clear-display");
            }
            else {
               var realHex = realColor.toHexString(),
                    realRgb = realColor.toRgbString();

                // Update the replaced elements background color (with actual selected color)
                if (rgbaSupport || realColor.alpha === 1) {
                    previewElement.css("background-color", realRgb);
                }
                else {
                    previewElement.css("background-color", "transparent");
                    previewElement.css("filter", realColor.toFilter());
                }

                if (opts.showAlpha) {
                    var rgb = realColor.toRgb();
                    rgb.a = 0;
                    var realAlpha = tinycolor(rgb).toRgbString();
                    var gradient = "linear-gradient(left, " + realAlpha + ", " + realHex + ")";

                    if (IE) {
                        alphaSliderInner.css("filter", tinycolor(realAlpha).toFilter({ gradientType: 1 }, realHex));
                    }
                    else {
                        alphaSliderInner.css("background", "-webkit-" + gradient);
                        alphaSliderInner.css("background", "-moz-" + gradient);
                        alphaSliderInner.css("background", "-ms-" + gradient);
                        alphaSliderInner.css("background", gradient);
                    }
                }

                displayColor = realColor.toString(format);
            }
            // Update the text entry input as it changes happen
            if (opts.showInput) {
                textInput.val(displayColor);
            }

            if (opts.showPalette) {
                drawPalette();
            }

            drawInitial();
        }

        function updateHelperLocations() {
            var s = currentSaturation;
            var v = currentValue;

            if(allowEmpty && isEmpty) {
                //if selected color is empty, hide the helpers
                alphaSlideHelper.hide();
                slideHelper.hide();
                dragHelper.hide();
            }
            else {
                //make sure helpers are visible
                alphaSlideHelper.show();
                slideHelper.show();
                dragHelper.show();

                // Where to show the little circle in that displays your current selected color
                var dragX = s * dragWidth;
                var dragY = dragHeight - (v * dragHeight);
                dragX = Math.max(
                    -dragHelperHeight,
                    Math.min(dragWidth - dragHelperHeight, dragX - dragHelperHeight)
                );
                dragY = Math.max(
                    -dragHelperHeight,
                    Math.min(dragHeight - dragHelperHeight, dragY - dragHelperHeight)
                );
                dragHelper.css({
                    "top": dragY,
                    "left": dragX
                });

                var alphaX = currentAlpha * alphaWidth;
                alphaSlideHelper.css({
                    "left": alphaX - (alphaSlideHelperWidth / 2)
                });

                // Where to show the bar that displays your current selected hue
                var slideY = (currentHue) * slideHeight;
                slideHelper.css({
                    "top": slideY - slideHelperHeight
                });
            }
        }

        function updateOriginalInput(fireCallback) {
            var color = get(),
                displayColor = '',
                hasChanged = !tinycolor.equals(color, colorOnShow);

            if(color) {
                displayColor = color.toString(currentPreferredFormat);
                // Update the selection palette with the current color
                addColorToSelectionPalette(color);
            }

            if (isInput) {
                boundElement.val(displayColor);
            }

            colorOnShow = color;

            if (fireCallback && hasChanged) {
                callbacks.change(color);
                boundElement.trigger('change', [ color ]);
            }
        }

        function reflow() {
            dragWidth = dragger.width();
            dragHeight = dragger.height();
            dragHelperHeight = dragHelper.height();
            slideWidth = slider.width();
            slideHeight = slider.height();
            slideHelperHeight = slideHelper.height();
            alphaWidth = alphaSlider.width();
            alphaSlideHelperWidth = alphaSlideHelper.width();

            if (!flat) {
                container.css("position", "absolute");
                container.offset(getOffset(container, offsetElement));
            }

            updateHelperLocations();
        }

        function destroy() {
            boundElement.show();
            offsetElement.unbind("click.spectrum touchstart.spectrum");
            container.remove();
            replacer.remove();
            spectrums[spect.id] = null;
        }

		function option(optionName, optionValue) {
			if(optionName === undefined) {
				return $.extend({}, opts);
			}
			if(optionValue === undefined) {
				return opts[optionName];
			}
			opts[optionName] = optionValue;
			applyOptions();

			if(optionName=='showInput')
			{
				// Get a format that alpha will be included in (hex and names ignore alpha)
				var format = currentPreferredFormat;
				if (currentAlpha < 1) {
					if (format === "hex" || format === "hex3" || format === "hex6" || format === "name") {
						format = "rgb";
					}
				}

				textInput.val(get({ format: format }).toString(format));
			}
		}

        function enable() {
            disabled = false;
            boundElement.attr("disabled", false);
            offsetElement.removeClass("sp-disabled");
        }

        function disable() {
            hide();
            disabled = true;
            boundElement.attr("disabled", true);
            offsetElement.addClass("sp-disabled");
        }

        initialize();

        var spect = {
            show: show,
            hide: hide,
            toggle: toggle,
            reflow: reflow,
            option: option,
            enable: enable,
            disable: disable,
            set: function (c) {
                set(c);
                updateOriginalInput();
            },
            get: get,
            destroy: destroy,
            container: container
        };

        spect.id = spectrums.push(spect) - 1;

        return spect;
    }

    /**
    * checkOffset - get the offset below/above and left/right element depending on screen position
    * Thanks https://github.com/jquery/jquery-ui/blob/master/ui/jquery.ui.datepicker.js
    */
    function getOffset(picker, input) {
        var extraY = 0;
        var dpWidth = picker.outerWidth();
        var dpHeight = picker.outerHeight();
        var inputHeight = input.outerHeight();
        var doc = picker[0].ownerDocument;
        var docElem = doc.documentElement;
        var viewWidth = docElem.clientWidth + $(doc).scrollLeft();
        var viewHeight = docElem.clientHeight + $(doc).scrollTop();
        var offset = input.offset();
        offset.top += inputHeight;

        offset.left -=
            Math.min(offset.left, (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ?
            Math.abs(offset.left + dpWidth - viewWidth) : 0);

        offset.top -=
            Math.min(offset.top, ((offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ?
            Math.abs(dpHeight + inputHeight - extraY) : extraY));

        return offset;
    }

    /**
    * noop - do nothing
    */
    function noop() {

    }

    /**
    * stopPropagation - makes the code only doing this a little easier to read in line
    */
    function stopPropagation(e) {
        e.stopPropagation();
    }

    /**
    * Create a function bound to a given object
    * Thanks to underscore.js
    */
    function bind(func, obj) {
        var slice = Array.prototype.slice;
        var args = slice.call(arguments, 2);
        return function () {
            return func.apply(obj, args.concat(slice.call(arguments)));
        };
    }

    /**
    * Lightweight drag helper.  Handles containment within the element, so that
    * when dragging, the x is within [0,element.width] and y is within [0,element.height]
    */
    function draggable(element, onmove, onstart, onstop) {
        onmove = onmove || function () { };
        onstart = onstart || function () { };
        onstop = onstop || function () { };
        var doc = element.ownerDocument || document;
        var dragging = false;
        var offset = {};
        var maxHeight = 0;
        var maxWidth = 0;
        var hasTouch = ('ontouchstart' in window);

        var duringDragEvents = {};
        duringDragEvents["selectstart"] = prevent;
        duringDragEvents["dragstart"] = prevent;
        duringDragEvents["touchmove mousemove"] = move;
        duringDragEvents["touchend mouseup"] = stop;

        function prevent(e) {
            if (e.stopPropagation) {
                e.stopPropagation();
            }
            if (e.preventDefault) {
                e.preventDefault();
            }
            e.returnValue = false;
        }

        function move(e) {
            if (dragging) {
                // Mouseup happened outside of window
                if (IE && document.documentMode < 9 && !e.button) {
                    return stop();
                }

                var touches = e.originalEvent.touches;
                var pageX = touches ? touches[0].pageX : e.pageX;
                var pageY = touches ? touches[0].pageY : e.pageY;

                var dragX = Math.max(0, Math.min(pageX - offset.left, maxWidth));
                var dragY = Math.max(0, Math.min(pageY - offset.top, maxHeight));

                if (hasTouch) {
                    // Stop scrolling in iOS
                    prevent(e);
                }

                onmove.apply(element, [dragX, dragY, e]);
            }
        }
        function start(e) {
            var rightclick = (e.which) ? (e.which == 3) : (e.button == 2);
            var touches = e.originalEvent.touches;

            if (!rightclick && !dragging) {
                if (onstart.apply(element, arguments) !== false) {
                    dragging = true;
                    maxHeight = $(element).height();
                    maxWidth = $(element).width();
                    offset = $(element).offset();

                    $(doc).bind(duringDragEvents);
                    $(doc.body).addClass("sp-dragging");

                    if (!hasTouch) {
                        move(e);
                    }

                    prevent(e);
                }
            }
        }
        function stop() {
            if (dragging) {
                $(doc).unbind(duringDragEvents);
                $(doc.body).removeClass("sp-dragging");
                onstop.apply(element, arguments);
            }
            dragging = false;
        }

        $(element).bind("touchstart mousedown", start);
    }

    function throttle(func, wait, debounce) {
        var timeout;
        return function () {
            var context = this, args = arguments;
            var throttler = function () {
                timeout = null;
                func.apply(context, args);
            };
            if (debounce) clearTimeout(timeout);
            if (debounce || !timeout) timeout = setTimeout(throttler, wait);
        };
    }


    function log(){/* jshint -W021 */if(window.console){if(Function.prototype.bind)log=Function.prototype.bind.call(console.log,console);else log=function(){Function.prototype.apply.call(console.log,console,arguments);};log.apply(this,arguments);}}

    /**
    * Define a jQuery plugin
    */
    var dataID = "spectrum.id";
    $.fn.spectrum = function (opts, extra) {

        if (typeof opts == "string") {

            var returnValue = this;
            var args = Array.prototype.slice.call( arguments, 1 );

            this.each(function () {
                var spect = spectrums[$(this).data(dataID)];
                if (spect) {

                    var method = spect[opts];
                    if (!method) {
                        throw new Error( "Spectrum: no such method: '" + opts + "'" );
                    }

                    if (opts == "get") {
                        returnValue = spect.get();
                    }
                    else if (opts == "container") {
                        returnValue = spect.container;
                    }
                    else if (opts == "option") {
                        returnValue = spect.option.apply(spect, args);
                    }
                    else if (opts == "destroy") {
                        spect.destroy();
                        $(this).removeData(dataID);
                    }
                    else {
                        method.apply(spect, args);
                    }
                }
            });

            return returnValue;
        }

        // Initializing a new instance of spectrum
        return this.spectrum("destroy").each(function () {
            var spect = spectrum(this, opts);
            $(this).data(dataID, spect.id);
        });
    };

    $.fn.spectrum.load = true;
    $.fn.spectrum.loadOpts = {};
    $.fn.spectrum.draggable = draggable;
    $.fn.spectrum.defaults = defaultOpts;

    $.spectrum = { };
    $.spectrum.localization = { };
    $.spectrum.palettes = { };

    $.fn.spectrum.processNativeColorInputs = function () {
        if (!inputTypeColorSupport) {
            $("input[type=color]").spectrum({
                preferredFormat: "hex6"
            });
        }
    };

    // TinyColor v0.9.16
    // https://github.com/bgrins/TinyColor
    // 2013-08-10, Brian Grinstead, MIT License

    (function() {

    var trimLeft = /^[\s,#]+/,
        trimRight = /\s+$/,
        tinyCounter = 0,
        math = Math,
        mathRound = math.round,
        mathMin = math.min,
        mathMax = math.max,
        mathRandom = math.random;

    function tinycolor (color, opts) {

        color = (color) ? color : '';
        opts = opts || { };

        // If input is already a tinycolor, return itself
        if (typeof color == "object" && color.hasOwnProperty("_tc_id")) {
           return color;
        }

        var rgb = inputToRGB(color);
        var r = rgb.r,
            g = rgb.g,
            b = rgb.b,
            a = rgb.a,
            roundA = mathRound(100*a) / 100,
            format = opts.format || rgb.format;

        // Don't let the range of [0,255] come back in [0,1].
        // Potentially lose a little bit of precision here, but will fix issues where
        // .5 gets interpreted as half of the total, instead of half of 1
        // If it was supposed to be 128, this was already taken care of by `inputToRgb`
        if (r < 1) { r = mathRound(r); }
        if (g < 1) { g = mathRound(g); }
        if (b < 1) { b = mathRound(b); }

        return {
            ok: rgb.ok,
            format: format,
            _tc_id: tinyCounter++,
            alpha: a,
            getAlpha: function() {
                return a;
            },
            setAlpha: function(value) {
                a = boundAlpha(value);
                roundA = mathRound(100*a) / 100;
            },
            toHsv: function() {
                var hsv = rgbToHsv(r, g, b);
                return { h: hsv.h * 360, s: hsv.s, v: hsv.v, a: a };
            },
            toHsvString: function() {
                var hsv = rgbToHsv(r, g, b);
                var h = mathRound(hsv.h * 360), s = mathRound(hsv.s * 100), v = mathRound(hsv.v * 100);
                return (a == 1) ?
                  "hsv("  + h + ", " + s + "%, " + v + "%)" :
                  "hsva(" + h + ", " + s + "%, " + v + "%, "+ roundA + ")";
            },
            toHsl: function() {
                var hsl = rgbToHsl(r, g, b);
                return { h: hsl.h * 360, s: hsl.s, l: hsl.l, a: a };
            },
            toHslString: function() {
                var hsl = rgbToHsl(r, g, b);
                var h = mathRound(hsl.h * 360), s = mathRound(hsl.s * 100), l = mathRound(hsl.l * 100);
                return (a == 1) ?
                  "hsl("  + h + ", " + s + "%, " + l + "%)" :
                  "hsla(" + h + ", " + s + "%, " + l + "%, "+ roundA + ")";
            },
            toHex: function(allow3Char) {
                return rgbToHex(r, g, b, allow3Char);
            },
            toHexString: function(allow3Char) {
                return '#' + rgbToHex(r, g, b, allow3Char);
            },
            toRgb: function() {
                return { r: mathRound(r), g: mathRound(g), b: mathRound(b), a: a };
            },
            toRgbString: function() {
                return (a == 1) ?
                  "rgb("  + mathRound(r) + ", " + mathRound(g) + ", " + mathRound(b) + ")" :
                  "rgba(" + mathRound(r) + ", " + mathRound(g) + ", " + mathRound(b) + ", " + roundA + ")";
            },
            toPercentageRgb: function() {
                return { r: mathRound(bound01(r, 255) * 100) + "%", g: mathRound(bound01(g, 255) * 100) + "%", b: mathRound(bound01(b, 255) * 100) + "%", a: a };
            },
            toPercentageRgbString: function() {
                return (a == 1) ?
                  "rgb("  + mathRound(bound01(r, 255) * 100) + "%, " + mathRound(bound01(g, 255) * 100) + "%, " + mathRound(bound01(b, 255) * 100) + "%)" :
                  "rgba(" + mathRound(bound01(r, 255) * 100) + "%, " + mathRound(bound01(g, 255) * 100) + "%, " + mathRound(bound01(b, 255) * 100) + "%, " + roundA + ")";
            },
            toName: function() {
                if (a === 0) {
                    return "transparent";
                }

                return hexNames[rgbToHex(r, g, b, true)] || false;
            },
            toFilter: function(secondColor) {
                var hex = rgbToHex(r, g, b);
                var secondHex = hex;
                var alphaHex = Math.round(parseFloat(a) * 255).toString(16);
                var secondAlphaHex = alphaHex;
                var gradientType = opts && opts.gradientType ? "GradientType = 1, " : "";

                if (secondColor) {
                    var s = tinycolor(secondColor);
                    secondHex = s.toHex();
                    secondAlphaHex = Math.round(parseFloat(s.alpha) * 255).toString(16);
                }

                return "progid:DXImageTransform.Microsoft.gradient("+gradientType+"startColorstr=#" + pad2(alphaHex) + hex + ",endColorstr=#" + pad2(secondAlphaHex) + secondHex + ")";
            },
            toString: function(format) {
                var formatSet = !!format;
                format = format || this.format;

                var formattedString = false;
                var hasAlphaAndFormatNotSet = !formatSet && a < 1 && a > 0;
                var formatWithAlpha = hasAlphaAndFormatNotSet && (format === "hex" || format === "hex6" || format === "hex3" || format === "name");

                if (format === "rgb") {
                    formattedString = this.toRgbString();
                }
                if (format === "prgb") {
                    formattedString = this.toPercentageRgbString();
                }
                if (format === "hex" || format === "hex6") {
                    formattedString = this.toHexString();
                }
                if (format === "hex3") {
                    formattedString = this.toHexString(true);
                }
                if (format === "name") {
                    formattedString = this.toName();
                }
                if (format === "hsl") {
                    formattedString = this.toHslString();
                }
                if (format === "hsv") {
                    formattedString = this.toHsvString();
                }

                if (formatWithAlpha) {
                    return this.toRgbString();
                }

                return formattedString || this.toHexString();
            }
        };
    }

    // If input is an object, force 1 into "1.0" to handle ratios properly
    // String input requires "1.0" as input, so 1 will be treated as 1
    tinycolor.fromRatio = function(color, opts) {
        if (typeof color == "object") {
            var newColor = {};
            for (var i in color) {
                if (color.hasOwnProperty(i)) {
                    if (i === "a") {
                        newColor[i] = color[i];
                    }
                    else {
                        newColor[i] = convertToPercentage(color[i]);
                    }
                }
            }
            color = newColor;
        }

        return tinycolor(color, opts);
    };

    // Given a string or object, convert that input to RGB
    // Possible string inputs:
    //
    //     "red"
    //     "#f00" or "f00"
    //     "#ff0000" or "ff0000"
    //     "rgb 255 0 0" or "rgb (255, 0, 0)"
    //     "rgb 1.0 0 0" or "rgb (1, 0, 0)"
    //     "rgba (255, 0, 0, 1)" or "rgba 255, 0, 0, 1"
    //     "rgba (1.0, 0, 0, 1)" or "rgba 1.0, 0, 0, 1"
    //     "hsl(0, 100%, 50%)" or "hsl 0 100% 50%"
    //     "hsla(0, 100%, 50%, 1)" or "hsla 0 100% 50%, 1"
    //     "hsv(0, 100%, 100%)" or "hsv 0 100% 100%"
    //
    function inputToRGB(color) {

        var rgb = { r: 0, g: 0, b: 0 };
        var a = 1;
        var ok = false;
        var format = false;

        if (typeof color == "string") {
            color = stringInputToObject(color);
        }

        if (typeof color == "object") {
            if (color.hasOwnProperty("r") && color.hasOwnProperty("g") && color.hasOwnProperty("b")) {
                rgb = rgbToRgb(color.r, color.g, color.b);
                ok = true;
                format = String(color.r).substr(-1) === "%" ? "prgb" : "rgb";
            }
            else if (color.hasOwnProperty("h") && color.hasOwnProperty("s") && color.hasOwnProperty("v")) {
                color.s = convertToPercentage(color.s);
                color.v = convertToPercentage(color.v);
                rgb = hsvToRgb(color.h, color.s, color.v);
                ok = true;
                format = "hsv";
            }
            else if (color.hasOwnProperty("h") && color.hasOwnProperty("s") && color.hasOwnProperty("l")) {
                color.s = convertToPercentage(color.s);
                color.l = convertToPercentage(color.l);
                rgb = hslToRgb(color.h, color.s, color.l);
                ok = true;
                format = "hsl";
            }

            if (color.hasOwnProperty("a")) {
                a = color.a;
            }
        }

        a = boundAlpha(a);

        return {
            ok: ok,
            format: color.format || format,
            r: mathMin(255, mathMax(rgb.r, 0)),
            g: mathMin(255, mathMax(rgb.g, 0)),
            b: mathMin(255, mathMax(rgb.b, 0)),
            a: a
        };
    }


    // Conversion Functions
    // --------------------

    // `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:
    // <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>

    // `rgbToRgb`
    // Handle bounds / percentage checking to conform to CSS color spec
    // <http://www.w3.org/TR/css3-color/>
    // *Assumes:* r, g, b in [0, 255] or [0, 1]
    // *Returns:* { r, g, b } in [0, 255]
    function rgbToRgb(r, g, b){
        return {
            r: bound01(r, 255) * 255,
            g: bound01(g, 255) * 255,
            b: bound01(b, 255) * 255
        };
    }

    // `rgbToHsl`
    // Converts an RGB color value to HSL.
    // *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]
    // *Returns:* { h, s, l } in [0,1]
    function rgbToHsl(r, g, b) {

        r = bound01(r, 255);
        g = bound01(g, 255);
        b = bound01(b, 255);

        var max = mathMax(r, g, b), min = mathMin(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;
        }

        return { h: h, s: s, l: l };
    }

    // `hslToRgb`
    // Converts an HSL color value to RGB.
    // *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]
    // *Returns:* { r, g, b } in the set [0, 255]
    function hslToRgb(h, s, l) {
        var r, g, b;

        h = bound01(h, 360);
        s = bound01(s, 100);
        l = bound01(l, 100);

        function hue2rgb(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;
        }

        if(s === 0) {
            r = g = b = l; // achromatic
        }
        else {
            var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
            var p = 2 * l - q;
            r = hue2rgb(p, q, h + 1/3);
            g = hue2rgb(p, q, h);
            b = hue2rgb(p, q, h - 1/3);
        }

        return { r: r * 255, g: g * 255, b: b * 255 };
    }

    // `rgbToHsv`
    // Converts an RGB color value to HSV
    // *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]
    // *Returns:* { h, s, v } in [0,1]
    function rgbToHsv(r, g, b) {

        r = bound01(r, 255);
        g = bound01(g, 255);
        b = bound01(b, 255);

        var max = mathMax(r, g, b), min = mathMin(r, g, b);
        var h, s, v = max;

        var d = max - min;
        s = max === 0 ? 0 : d / max;

        if(max == min) {
            h = 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;
        }
        return { h: h, s: s, v: v };
    }

    // `hsvToRgb`
    // Converts an HSV color value to RGB.
    // *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]
    // *Returns:* { r, g, b } in the set [0, 255]
     function hsvToRgb(h, s, v) {

        h = bound01(h, 360) * 6;
        s = bound01(s, 100);
        v = bound01(v, 100);

        var i = math.floor(h),
            f = h - i,
            p = v * (1 - s),
            q = v * (1 - f * s),
            t = v * (1 - (1 - f) * s),
            mod = i % 6,
            r = [v, q, p, p, t, v][mod],
            g = [t, v, v, q, p, p][mod],
            b = [p, p, t, v, v, q][mod];

        return { r: r * 255, g: g * 255, b: b * 255 };
    }

    // `rgbToHex`
    // Converts an RGB color to hex
    // Assumes r, g, and b are contained in the set [0, 255]
    // Returns a 3 or 6 character hex
    function rgbToHex(r, g, b, allow3Char) {

        var hex = [
            pad2(mathRound(r).toString(16)),
            pad2(mathRound(g).toString(16)),
            pad2(mathRound(b).toString(16))
        ];

        // Return a 3 character hex if possible
        if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1)) {
            return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);
        }

        return hex.join("");
    }

    // `equals`
    // Can be called with any tinycolor input
    tinycolor.equals = function (color1, color2) {
        if (!color1 || !color2) { return false; }
        return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();
    };
    tinycolor.random = function() {
        return tinycolor.fromRatio({
            r: mathRandom(),
            g: mathRandom(),
            b: mathRandom()
        });
    };


    // Modification Functions
    // ----------------------
    // Thanks to less.js for some of the basics here
    // <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>

    tinycolor.desaturate = function (color, amount) {
        amount = (amount === 0) ? 0 : (amount || 10);
        var hsl = tinycolor(color).toHsl();
        hsl.s -= amount / 100;
        hsl.s = clamp01(hsl.s);
        return tinycolor(hsl);
    };
    tinycolor.saturate = function (color, amount) {
        amount = (amount === 0) ? 0 : (amount || 10);
        var hsl = tinycolor(color).toHsl();
        hsl.s += amount / 100;
        hsl.s = clamp01(hsl.s);
        return tinycolor(hsl);
    };
    tinycolor.greyscale = function(color) {
        return tinycolor.desaturate(color, 100);
    };
    tinycolor.lighten = function(color, amount) {
        amount = (amount === 0) ? 0 : (amount || 10);
        var hsl = tinycolor(color).toHsl();
        hsl.l += amount / 100;
        hsl.l = clamp01(hsl.l);
        return tinycolor(hsl);
    };
    tinycolor.darken = function (color, amount) {
        amount = (amount === 0) ? 0 : (amount || 10);
        var hsl = tinycolor(color).toHsl();
        hsl.l -= amount / 100;
        hsl.l = clamp01(hsl.l);
        return tinycolor(hsl);
    };
    tinycolor.complement = function(color) {
        var hsl = tinycolor(color).toHsl();
        hsl.h = (hsl.h + 180) % 360;
        return tinycolor(hsl);
    };


    // Combination Functions
    // ---------------------
    // Thanks to jQuery xColor for some of the ideas behind these
    // <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>

    tinycolor.triad = function(color) {
        var hsl = tinycolor(color).toHsl();
        var h = hsl.h;
        return [
            tinycolor(color),
            tinycolor({ h: (h + 120) % 360, s: hsl.s, l: hsl.l }),
            tinycolor({ h: (h + 240) % 360, s: hsl.s, l: hsl.l })
        ];
    };
    tinycolor.tetrad = function(color) {
        var hsl = tinycolor(color).toHsl();
        var h = hsl.h;
        return [
            tinycolor(color),
            tinycolor({ h: (h + 90) % 360, s: hsl.s, l: hsl.l }),
            tinycolor({ h: (h + 180) % 360, s: hsl.s, l: hsl.l }),
            tinycolor({ h: (h + 270) % 360, s: hsl.s, l: hsl.l })
        ];
    };
    tinycolor.splitcomplement = function(color) {
        var hsl = tinycolor(color).toHsl();
        var h = hsl.h;
        return [
            tinycolor(color),
            tinycolor({ h: (h + 72) % 360, s: hsl.s, l: hsl.l}),
            tinycolor({ h: (h + 216) % 360, s: hsl.s, l: hsl.l})
        ];
    };
    tinycolor.analogous = function(color, results, slices) {
        results = results || 6;
        slices = slices || 30;

        var hsl = tinycolor(color).toHsl();
        var part = 360 / slices;
        var ret = [tinycolor(color)];

        for (hsl.h = ((hsl.h - (part * results >> 1)) + 720) % 360; --results; ) {
            hsl.h = (hsl.h + part) % 360;
            ret.push(tinycolor(hsl));
        }
        return ret;
    };
    tinycolor.monochromatic = function(color, results) {
        results = results || 6;
        var hsv = tinycolor(color).toHsv();
        var h = hsv.h, s = hsv.s, v = hsv.v;
        var ret = [];
        var modification = 1 / results;

        while (results--) {
            ret.push(tinycolor({ h: h, s: s, v: v}));
            v = (v + modification) % 1;
        }

        return ret;
    };


    // Readability Functions
    // ---------------------
    // <http://www.w3.org/TR/AERT#color-contrast>

    // `readability`
    // Analyze the 2 colors and returns an object with the following properties:
    //    `brightness`: difference in brightness between the two colors
    //    `color`: difference in color/hue between the two colors
    tinycolor.readability = function(color1, color2) {
        var a = tinycolor(color1).toRgb();
        var b = tinycolor(color2).toRgb();
        var brightnessA = (a.r * 299 + a.g * 587 + a.b * 114) / 1000;
        var brightnessB = (b.r * 299 + b.g * 587 + b.b * 114) / 1000;
        var colorDiff = (
            Math.max(a.r, b.r) - Math.min(a.r, b.r) +
            Math.max(a.g, b.g) - Math.min(a.g, b.g) +
            Math.max(a.b, b.b) - Math.min(a.b, b.b)
        );

        return {
            brightness: Math.abs(brightnessA - brightnessB),
            color: colorDiff
        };
    };

    // `readable`
    // http://www.w3.org/TR/AERT#color-contrast
    // Ensure that foreground and background color combinations provide sufficient contrast.
    // *Example*
    //    tinycolor.readable("#000", "#111") => false
    tinycolor.readable = function(color1, color2) {
        var readability = tinycolor.readability(color1, color2);
        return readability.brightness > 125 && readability.color > 500;
    };

    // `mostReadable`
    // Given a base color and a list of possible foreground or background
    // colors for that base, returns the most readable color.
    // *Example*
    //    tinycolor.mostReadable("#123", ["#fff", "#000"]) => "#000"
    tinycolor.mostReadable = function(baseColor, colorList) {
        var bestColor = null;
        var bestScore = 0;
        var bestIsReadable = false;
        for (var i=0; i < colorList.length; i++) {

            // We normalize both around the "acceptable" breaking point,
            // but rank brightness constrast higher than hue.

            var readability = tinycolor.readability(baseColor, colorList[i]);
            var readable = readability.brightness > 125 && readability.color > 500;
            var score = 3 * (readability.brightness / 125) + (readability.color / 500);

            if ((readable && ! bestIsReadable) ||
                (readable && bestIsReadable && score > bestScore) ||
                ((! readable) && (! bestIsReadable) && score > bestScore)) {
                bestIsReadable = readable;
                bestScore = score;
                bestColor = tinycolor(colorList[i]);
            }
        }
        return bestColor;
    };


    // Big List of Colors
    // ------------------
    // <http://www.w3.org/TR/css3-color/#svg-color>
    var names = tinycolor.names = {
        aliceblue: "f0f8ff",
        antiquewhite: "faebd7",
        aqua: "0ff",
        aquamarine: "7fffd4",
        azure: "f0ffff",
        beige: "f5f5dc",
        bisque: "ffe4c4",
        black: "000",
        blanchedalmond: "ffebcd",
        blue: "00f",
        blueviolet: "8a2be2",
        brown: "a52a2a",
        burlywood: "deb887",
        burntsienna: "ea7e5d",
        cadetblue: "5f9ea0",
        chartreuse: "7fff00",
        chocolate: "d2691e",
        coral: "ff7f50",
        cornflowerblue: "6495ed",
        cornsilk: "fff8dc",
        crimson: "dc143c",
        cyan: "0ff",
        darkblue: "00008b",
        darkcyan: "008b8b",
        darkgoldenrod: "b8860b",
        darkgray: "a9a9a9",
        darkgreen: "006400",
        darkgrey: "a9a9a9",
        darkkhaki: "bdb76b",
        darkmagenta: "8b008b",
        darkolivegreen: "556b2f",
        darkorange: "ff8c00",
        darkorchid: "9932cc",
        darkred: "8b0000",
        darksalmon: "e9967a",
        darkseagreen: "8fbc8f",
        darkslateblue: "483d8b",
        darkslategray: "2f4f4f",
        darkslategrey: "2f4f4f",
        darkturquoise: "00ced1",
        darkviolet: "9400d3",
        deeppink: "ff1493",
        deepskyblue: "00bfff",
        dimgray: "696969",
        dimgrey: "696969",
        dodgerblue: "1e90ff",
        firebrick: "b22222",
        floralwhite: "fffaf0",
        forestgreen: "228b22",
        fuchsia: "f0f",
        gainsboro: "dcdcdc",
        ghostwhite: "f8f8ff",
        gold: "ffd700",
        goldenrod: "daa520",
        gray: "808080",
        green: "008000",
        greenyellow: "adff2f",
        grey: "808080",
        honeydew: "f0fff0",
        hotpink: "ff69b4",
        indianred: "cd5c5c",
        indigo: "4b0082",
        ivory: "fffff0",
        khaki: "f0e68c",
        lavender: "e6e6fa",
        lavenderblush: "fff0f5",
        lawngreen: "7cfc00",
        lemonchiffon: "fffacd",
        lightblue: "add8e6",
        lightcoral: "f08080",
        lightcyan: "e0ffff",
        lightgoldenrodyellow: "fafad2",
        lightgray: "d3d3d3",
        lightgreen: "90ee90",
        lightgrey: "d3d3d3",
        lightpink: "ffb6c1",
        lightsalmon: "ffa07a",
        lightseagreen: "20b2aa",
        lightskyblue: "87cefa",
        lightslategray: "789",
        lightslategrey: "789",
        lightsteelblue: "b0c4de",
        lightyellow: "ffffe0",
        lime: "0f0",
        limegreen: "32cd32",
        linen: "faf0e6",
        magenta: "f0f",
        maroon: "800000",
        mediumaquamarine: "66cdaa",
        mediumblue: "0000cd",
        mediumorchid: "ba55d3",
        mediumpurple: "9370db",
        mediumseagreen: "3cb371",
        mediumslateblue: "7b68ee",
        mediumspringgreen: "00fa9a",
        mediumturquoise: "48d1cc",
        mediumvioletred: "c71585",
        midnightblue: "191970",
        mintcream: "f5fffa",
        mistyrose: "ffe4e1",
        moccasin: "ffe4b5",
        navajowhite: "ffdead",
        navy: "000080",
        oldlace: "fdf5e6",
        olive: "808000",
        olivedrab: "6b8e23",
        orange: "ffa500",
        orangered: "ff4500",
        orchid: "da70d6",
        palegoldenrod: "eee8aa",
        palegreen: "98fb98",
        paleturquoise: "afeeee",
        palevioletred: "db7093",
        papayawhip: "ffefd5",
        peachpuff: "ffdab9",
        peru: "cd853f",
        pink: "ffc0cb",
        plum: "dda0dd",
        powderblue: "b0e0e6",
        purple: "800080",
        red: "f00",
        rosybrown: "bc8f8f",
        royalblue: "4169e1",
        saddlebrown: "8b4513",
        salmon: "fa8072",
        sandybrown: "f4a460",
        seagreen: "2e8b57",
        seashell: "fff5ee",
        sienna: "a0522d",
        silver: "c0c0c0",
        skyblue: "87ceeb",
        slateblue: "6a5acd",
        slategray: "708090",
        slategrey: "708090",
        snow: "fffafa",
        springgreen: "00ff7f",
        steelblue: "4682b4",
        tan: "d2b48c",
        teal: "008080",
        thistle: "d8bfd8",
        tomato: "ff6347",
        turquoise: "40e0d0",
        violet: "ee82ee",
        wheat: "f5deb3",
        white: "fff",
        whitesmoke: "f5f5f5",
        yellow: "ff0",
        yellowgreen: "9acd32"
    };

    // Make it easy to access colors via `hexNames[hex]`
    var hexNames = tinycolor.hexNames = flip(names);


    // Utilities
    // ---------

    // `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`
    function flip(o) {
        var flipped = { };
        for (var i in o) {
            if (o.hasOwnProperty(i)) {
                flipped[o[i]] = i;
            }
        }
        return flipped;
    }

    // Return a valid alpha value [0,1] with all invalid values being set to 1
    function boundAlpha(a) {
        a = parseFloat(a);

        if (isNaN(a) || a < 0 || a > 1) {
            a = 1;
        }

        return a;
    }

    // Take input from [0, n] and return it as [0, 1]
    function bound01(n, max) {
        if (isOnePointZero(n)) { n = "100%"; }

        var processPercent = isPercentage(n);
        n = mathMin(max, mathMax(0, parseFloat(n)));

        // Automatically convert percentage into number
        if (processPercent) {
            n = parseInt(n * max, 10) / 100;
        }

        // Handle floating point rounding errors
        if ((math.abs(n - max) < 0.000001)) {
            return 1;
        }

        // Convert into [0, 1] range if it isn't already
        return (n % max) / parseFloat(max);
    }

    // Force a number between 0 and 1
    function clamp01(val) {
        return mathMin(1, mathMax(0, val));
    }

    // Parse an integer into hex
    function parseHex(val) {
        return parseInt(val, 16);
    }

    // Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
    // <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
    function isOnePointZero(n) {
        return typeof n == "string" && n.indexOf('.') != -1 && parseFloat(n) === 1;
    }

    // Check to see if string passed in is a percentage
    function isPercentage(n) {
        return typeof n === "string" && n.indexOf('%') != -1;
    }

    // Force a hex value to have 2 characters
    function pad2(c) {
        return c.length == 1 ? '0' + c : '' + c;
    }

    // Replace a decimal with it's percentage value
    function convertToPercentage(n) {
        if (n <= 1) {
            n = (n * 100) + "%";
        }

        return n;
    }

    var matchers = (function() {

        // <http://www.w3.org/TR/css3-values/#integers>
        var CSS_INTEGER = "[-\\+]?\\d+%?";

        // <http://www.w3.org/TR/css3-values/#number-value>
        var CSS_NUMBER = "[-\\+]?\\d*\\.\\d+%?";

        // Allow positive/negative integer/number.  Don't capture the either/or, just the entire outcome.
        var CSS_UNIT = "(?:" + CSS_NUMBER + ")|(?:" + CSS_INTEGER + ")";

        // Actual matching.
        // Parentheses and commas are optional, but not required.
        // Whitespace can take the place of commas or opening paren
        var PERMISSIVE_MATCH3 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")\\s*\\)?";
        var PERMISSIVE_MATCH4 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")\\s*\\)?";

        return {
            rgb: new RegExp("rgb" + PERMISSIVE_MATCH3),
            rgba: new RegExp("rgba" + PERMISSIVE_MATCH4),
            hsl: new RegExp("hsl" + PERMISSIVE_MATCH3),
            hsla: new RegExp("hsla" + PERMISSIVE_MATCH4),
            hsv: new RegExp("hsv" + PERMISSIVE_MATCH3),
            hex3: /^([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
            hex6: /^([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/
        };
    })();

    // `stringInputToObject`
    // Permissive string parsing.  Take in a number of formats, and output an object
    // based on detected format.  Returns `{ r, g, b }` or `{ h, s, l }` or `{ h, s, v}`
    function stringInputToObject(color) {

        color = color.replace(trimLeft,'').replace(trimRight, '').toLowerCase();
        var named = false;
        if (names[color]) {
            color = names[color];
            named = true;
        }
        else if (color == 'transparent') {
            return { r: 0, g: 0, b: 0, a: 0, format: "name" };
        }

        // Try to match string input using regular expressions.
        // Keep most of the number bounding out of this function - don't worry about [0,1] or [0,100] or [0,360]
        // Just return an object and let the conversion functions handle that.
        // This way the result will be the same whether the tinycolor is initialized with string or object.
        var match;
        if ((match = matchers.rgb.exec(color))) {
            return { r: match[1], g: match[2], b: match[3] };
        }
        if ((match = matchers.rgba.exec(color))) {
            return { r: match[1], g: match[2], b: match[3], a: match[4] };
        }
        if ((match = matchers.hsl.exec(color))) {
            return { h: match[1], s: match[2], l: match[3] };
        }
        if ((match = matchers.hsla.exec(color))) {
            return { h: match[1], s: match[2], l: match[3], a: match[4] };
        }
        if ((match = matchers.hsv.exec(color))) {
            return { h: match[1], s: match[2], v: match[3] };
        }
        if ((match = matchers.hex6.exec(color))) {
            return {
                r: parseHex(match[1]),
                g: parseHex(match[2]),
                b: parseHex(match[3]),
                format: named ? "name" : "hex"
            };
        }
        if ((match = matchers.hex3.exec(color))) {
            return {
                r: parseHex(match[1] + '' + match[1]),
                g: parseHex(match[2] + '' + match[2]),
                b: parseHex(match[3] + '' + match[3]),
                format: named ? "name" : "hex"
            };
        }

        return false;
    }

    // Expose tinycolor to window, does not need to run in non-browser context.
    window.tinycolor = tinycolor;

    })();


    $(function () {
        if ($.fn.spectrum.load) {
            $.fn.spectrum.processNativeColorInputs();
        }
    });

})(window, jQuery);
