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// Spectrum Colorpicker v1.8.1
// https://github.com/bgrins/spectrum
// Author: Brian Grinstead
// License: MIT

(function (factory) {
    "use strict";

if (typeof define === 'function' && define.amd) { // AMD
        define(['jquery'], factory);
    }
    else if (typeof exports == "object" && typeof module == "object") { // CommonJS
        module.exports = factory(require('jquery'));
    }
    else { // Browser
        factory(jQuery);
    }
})(function($, undefined) {
    "use strict";

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: true,
        showInitial: false,
        showPalette: false,
        showPaletteOnly: false,
        hideAfterPaletteSelect: false,
        togglePaletteOnly: false,
        showSelectionPalette: true,
        localStorageKey: false,
        appendTo: "body",
        maxSelectionSize: 7,
        cancelText: "cancel",
        chooseText: "choose",
        togglePaletteMoreText: "more",
        togglePaletteLessText: "less",
        clearText: "Clear Color Selection",
        noColorSelectedText: "No Color Selected",
        preferredFormat: false,
        className: "", // Deprecated - use containerClassName and replacerClassName instead.
        containerClassName: "",
        replacerClassName: "",
        showAlpha: false,
        theme: "sp-light",
        palette: [["#ffffff", "#000000", "#ff0000", "#ff8000", "#ffff00", "#008000", "#0000ff", "#4b0082", "#9400d3"]],
        selectionPalette: [],
        disabled: false,
        offset: null
    },
    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');
    })(),
    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-palette-container'>",
                    "<div class='sp-palette sp-thumb sp-cf'></div>",
                    "<div class='sp-palette-button-container sp-cf'>",
                        "<button type='button' class='sp-palette-toggle'></button>",
                    "</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'>",
                            "</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'  />",
                    "</div>",
                    "<div class='sp-initial sp-thumb sp-cf'></div>",
                    "<div class='sp-button-container sp-cf'>",
                        "<a class='sp-cancel' href='#'></a>",
                        "<button type='button' class='sp-choose'></button>",
                    "</div>",
                "</div>",
            "</div>"
        ].join("");
    })();

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,
            isDragging = 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 = [],
            paletteArray = [],
            paletteLookup = {},
            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),
            pickerContainer = container.find(".sp-picker-container"),
            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"),
            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"),
            toggleButton = container.find(".sp-palette-toggle"),
            isInput = boundElement.is("input"),
            isInputTypeColor = isInput && boundElement.attr("type") === "color" && inputTypeColorSupport(),
            shouldReplace = isInput && !flat,
            replacer = (shouldReplace) ? $(replaceInput).addClass(theme).addClass(opts.className).addClass(opts.replacerClassName) : $([]),
            offsetElement = (shouldReplace) ? replacer : boundElement,
            previewElement = replacer.find(".sp-preview-inner"),
            initialColor = opts.color || (isInput && boundElement.val()),
            colorOnShow = false,
            currentPreferredFormat = opts.preferredFormat,
            clickoutFiresChange = !opts.showButtons || opts.clickoutFiresChange,
            isEmpty = !initialColor,
            allowEmpty = opts.allowEmpty && !isInputTypeColor;

function applyOptions() {

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

toggleButton.text(opts.showPaletteOnly ? opts.togglePaletteMoreText : opts.togglePaletteLessText);

if (opts.palette) {
                palette = opts.palette.slice(0);
                paletteArray = Array.isArray(palette[0]) ? palette : [palette];
                paletteLookup = {};
                for (var i = 0; i < paletteArray.length; i++) {
                    for (var j = 0; j < paletteArray[i].length; j++) {
                        var rgb = tinycolor(paletteArray[i][j]).toRgbString();
                        paletteLookup[rgb] = 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-buttons-disabled", !opts.togglePaletteOnly);
            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).addClass(opts.containerClassName);

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);
            }

updateSelectionPaletteFromStorage();

offsetElement.on("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.on("click", stopPropagation);

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

cancelButton.text(opts.cancelText);
            cancelButton.on("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();
                revert();
                hide();
            });

clearButton.attr("title", opts.clearText);
            clearButton.on("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.text(opts.chooseText);
            chooseButton.on("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();

if (IE && textInput.is(":focus")) {
                    textInput.trigger('change');
                }

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

toggleButton.text(opts.showPaletteOnly ? opts.togglePaletteMoreText : opts.togglePaletteLessText);
            toggleButton.on("click.spectrum", function (e) {
                e.stopPropagation();
                e.preventDefault();

opts.showPaletteOnly = !opts.showPaletteOnly;

// To make sure the Picker area is drawn on the right, next to the
                // Palette area (and not below the palette), first move the Palette
                // to the left to make space for the picker, plus 5px extra.
                // The 'applyOptions' function puts the whole container back into place
                // and takes care of the button-text and the sp-palette-only CSS class.
                if (!opts.showPaletteOnly && !flat) {
                    container.css('left', '-=' + (pickerContainer.outerWidth(true) + 5));
                }
                applyOptions();
            });

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

move();
            }, dragStart, dragStop);

draggable(slider, function (dragX, dragY) {
                currentHue = parseFloat(dragY / slideHeight);
                isEmpty = false;
                if (!opts.showAlpha) {
                    currentAlpha = 1;
                }
                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;
                if (!opts.showAlpha) {
                    currentAlpha = 1;
                }

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 = opts.preferredFormat || tinycolor(initialColor).format;

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

if (flat) {
                show();
            }

function paletteElementClick(e) {
                if (e.data && e.data.ignore) {
                    set($(e.target).closest(".sp-thumb-el").data("color"));
                    move();
                }
                else {
                    set($(e.target).closest(".sp-thumb-el").data("color"));
                    move();

// If the picker is going to close immediately, a palette selection
                    // is a change.  Otherwise, it's a move only.
                    if (opts.hideAfterPaletteSelect) {
                        updateOriginalInput(true);
                        hide();
                    } else {
                        updateOriginalInput();
                    }
                }

return false;
            }

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

function updateSelectionPaletteFromStorage() {

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) { }
            }
        }

function addColorToSelectionPalette(color) {
            if (showSelectionPalette) {
                var rgb = tinycolor(color).toRgbString();
                if (!paletteLookup[rgb] && $.inArray(rgb, selectionPalette) === -1) {
                    selectionPalette.push(rgb);
                    while(selectionPalette.length > maxSelectionSize) {
                        selectionPalette.shift();
                    }
                }

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

function getUniqueSelectionPalette() {
            var unique = [];
            if (opts.showPalette) {
                for (var i = 0; i < selectionPalette.length; i++) {
                    var rgb = tinycolor(selectionPalette[i]).toRgbString();

if (!paletteLookup[rgb]) {
                        unique.push(selectionPalette[i]);
                    }
                }
            }

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, opts);
            });

updateSelectionPaletteFromStorage();

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

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", opts));
            }
        }

function dragStart() {
            if (dragHeight <= 0 || dragWidth <= 0 || slideHeight <= 0) {
                reflow();
            }
            isDragging = true;
            container.addClass(draggingClass);
            shiftMovementDirection = null;
            boundElement.trigger('dragstart.spectrum', [ get() ]);
        }

function dragStop() {
            isDragging = false;
            container.removeClass(draggingClass);
            boundElement.trigger('dragstop.spectrum', [ get() ]);
        }

function setFromTextInput() {

var value = textInput.val();

if ((value === null || value === "") && allowEmpty) {
                set(null);
                move();
                updateOriginalInput();
            }
            else {
                var tiny = tinycolor(value);
                if (tiny.isValid()) {
                    set(tiny);
                    move();
                    updateOriginalInput();
                }
                else {
                    textInput.addClass("sp-validation-error");
                }
            }
        }

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).on("keydown.spectrum", onkeydown);
            $(doc).on("click.spectrum", clickout);
            $(window).on("resize.spectrum", resize);
            replacer.addClass("sp-active");
            container.removeClass("sp-hidden");

reflow();
            updateUI();

colorOnShow = get();

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

function onkeydown(e) {
            // Close on ESC
            if (e.keyCode === 27) {
                hide();
            }
        }

function clickout(e) {
            // Return on right click.
            if (e.button == 2) { return; }

// If a drag event was happening during the mouseup, don't hide
            // on click.
            if (isDragging) { return; }

if (clickoutFiresChange) {
                updateOriginalInput(true);
            }
            else {
                revert();
            }
            hide();
        }

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

$(doc).off("keydown.spectrum", onkeydown);
            $(doc).off("click.spectrum", clickout);
            $(window).off("resize.spectrum", resize);

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

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

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

function set(color, ignoreFormatChange) {
            if (tinycolor.equals(color, get())) {
                // Update UI just in case a validation error needs
                // to be cleared.
                updateUI();
                return;
            }

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

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

if (newColor && newColor.isValid() && !ignoreFormatChange) {
                currentPreferredFormat = opts.preferredFormat || newColor.getFormat();
            }
        }

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

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

return tinycolor.fromRatio({
                h: currentHue,
                s: currentSaturation,
                v: currentValue,
                a: Math.round(currentAlpha * 1000) / 1000
            }, { 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");

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 && !(currentAlpha === 0 && format === "name")) {
                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);
                        // Use current syntax gradient on unprefixed property.
                        alphaSliderInner.css("background",
                            "linear-gradient(to right, " + realAlpha + ", " + realHex + ")");
                    }
                }

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 + "px",
                    "left": dragX + "px"
                });

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

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

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);
            }

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

function reflow() {
            if (!visible) {
                return; // Calculations would be useless and wouldn't be reliable anyways
            }
            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");
                if (opts.offset) {
                    container.offset(opts.offset);
                } else {
                    container.offset(getOffset(container, offsetElement));
                }
            }

updateHelperLocations();

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

boundElement.trigger('reflow.spectrum');
        }

function destroy() {
            boundElement.show();
            offsetElement.off("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;

if (optionName === "preferredFormat") {
                currentPreferredFormat = opts.preferredFormat;
            }
            applyOptions();
        }

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");
        }

function setOffset(coord) {
            opts.offset = coord;
            reflow();
        }

initialize();

var spect = {
            show: show,
            hide: hide,
            toggle: toggle,
            reflow: reflow,
            option: option,
            enable: enable,
            disable: disable,
            offset: setOffset,
            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();
        var offsetLeft = offset.left;
        var offsetTop = offset.top;

offsetTop += inputHeight;

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

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

return {
            top: offsetTop,
            bottom: offset.bottom,
            left: offsetLeft,
            right: offset.right,
            width: offset.width,
            height: offset.height
        };
    }

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

var t0 = e.originalEvent && e.originalEvent.touches && e.originalEvent.touches[0];
                var pageX = t0 && t0.pageX || e.pageX;
                var pageY = t0 && t0.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);

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

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

move(e);

prevent(e);
                }
            }
        }

function stop() {
            if (dragging) {
                $(doc).off(duringDragEvents);
                $(doc.body).removeClass("sp-dragging");

// Wait a tick before notifying observers to allow the click event
                // to fire in Chrome.
                setTimeout(function() {
                    onstop.apply(element, arguments);
                }, 0);
            }
            dragging = false;
        }

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

function inputTypeColorSupport() {
        return $.fn.spectrum.inputTypeColorSupport();
    }

/**
    * 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 options = $.extend({}, $(this).data(), opts);
            var spect = spectrum(this, options);
            $(this).data(dataID, spect.id);
        });
    };

$.fn.spectrum.load = true;
    $.fn.spectrum.loadOpts = {};
    $.fn.spectrum.draggable = draggable;
    $.fn.spectrum.defaults = defaultOpts;
    $.fn.spectrum.inputTypeColorSupport = function inputTypeColorSupport() {
        if (typeof inputTypeColorSupport._cachedResult === "undefined") {
            var colorInput = $("<input type='color'/>")[0]; // if color element is supported, value will default to not null
            inputTypeColorSupport._cachedResult = colorInput.type === "color" && colorInput.value !== "";
        }
        return inputTypeColorSupport._cachedResult;
    };

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

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

// TinyColor v1.1.2
    // https://github.com/bgrins/TinyColor
    // 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;

var tinycolor = function(color, opts) {

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

// If input is already a tinycolor, return itself
        if (color instanceof tinycolor) {
           return color;
        }
        // If we are called as a function, call using new instead
        if (!(this instanceof tinycolor)) {
            return new tinycolor(color, opts);
        }

var rgb = inputToRGB(color);
        this._originalInput = color;
        this._r = rgb.r;
        this._g = rgb.g;
        this._b = rgb.b;
        this._a = rgb.a;
        this._roundA = mathRound(1000 * this._a) / 1000;
        this._format = opts.format || rgb.format;
        this._gradientType = opts.gradientType;

// 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 (this._r < 1) { this._r = mathRound(this._r); }
        if (this._g < 1) { this._g = mathRound(this._g); }
        if (this._b < 1) { this._b = mathRound(this._b); }

this._ok = rgb.ok;
        this._tc_id = tinyCounter++;
    };

tinycolor.prototype = {
        isDark: function() {
            return this.getBrightness() < 128;
        },
        isLight: function() {
            return !this.isDark();
        },
        isValid: function() {
            return this._ok;
        },
        getOriginalInput: function() {
          return this._originalInput;
        },
        getFormat: function() {
            return this._format;
        },
        getAlpha: function() {
            return this._a;
        },
        getBrightness: function() {
            var rgb = this.toRgb();
            return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;
        },
        setAlpha: function(value) {
            this._a = boundAlpha(value);
            this._roundA = mathRound(1000 * this._a) / 1000;
            return this;
        },
        toHsv: function() {
            var hsv = rgbToHsv(this._r, this._g, this._b);
            return { h: hsv.h * 360, s: hsv.s, v: hsv.v, a: this._a };
        },
        toHsvString: function() {
            var hsv = rgbToHsv(this._r, this._g, this._b);
            var h = mathRound(hsv.h * 360), s = mathRound(hsv.s * 100), v = mathRound(hsv.v * 100);
            return (this._a == 1) ?
              "hsv("  + h + ", " + s + "%, " + v + "%)" :
              "hsva(" + h + ", " + s + "%, " + v + "%, "+ this._roundA + ")";
        },
        toHsl: function() {
            var hsl = rgbToHsl(this._r, this._g, this._b);
            return { h: hsl.h * 360, s: hsl.s, l: hsl.l, a: this._a };
        },
        toHslString: function() {
            var hsl = rgbToHsl(this._r, this._g, this._b);
            var h = mathRound(hsl.h * 360), s = mathRound(hsl.s * 100), l = mathRound(hsl.l * 100);
            return (this._a == 1) ?
              "hsl("  + h + ", " + s + "%, " + l + "%)" :
              "hsla(" + h + ", " + s + "%, " + l + "%, "+ this._roundA + ")";
        },
        toHex: function(allow3Char) {
            return rgbToHex(this._r, this._g, this._b, allow3Char);
        },
        toHexString: function(allow3Char) {
            return '#' + this.toHex(allow3Char);
        },
        toHex8: function() {
            return rgbaToHex(this._r, this._g, this._b, this._a);
        },
        toHex8String: function() {
            return '#' + this.toHex8();
        },
        toRgb: function() {
            return { r: mathRound(this._r), g: mathRound(this._g), b: mathRound(this._b), a: this._a };
        },
        toRgbString: function() {
            return (this._a == 1) ?
              "rgb("  + mathRound(this._r) + ", " + mathRound(this._g) + ", " + mathRound(this._b) + ")" :
              "rgba(" + mathRound(this._r) + ", " + mathRound(this._g) + ", " + mathRound(this._b) + ", " + this._roundA + ")";
        },
        toPercentageRgb: function() {
            return { r: mathRound(bound01(this._r, 255) * 100) + "%", g: mathRound(bound01(this._g, 255) * 100) + "%", b: mathRound(bound01(this._b, 255) * 100) + "%", a: this._a };
        },
        toPercentageRgbString: function() {
            return (this._a == 1) ?
              "rgb("  + mathRound(bound01(this._r, 255) * 100) + "%, " + mathRound(bound01(this._g, 255) * 100) + "%, " + mathRound(bound01(this._b, 255) * 100) + "%)" :
              "rgba(" + mathRound(bound01(this._r, 255) * 100) + "%, " + mathRound(bound01(this._g, 255) * 100) + "%, " + mathRound(bound01(this._b, 255) * 100) + "%, " + this._roundA + ")";
        },
        toName: function() {
            if (this._a === 0) {
                return "transparent";
            }

if (this._a < 1) {
                return false;
            }

return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;
        },
        toFilter: function(secondColor) {
            var hex8String = '#' + rgbaToHex(this._r, this._g, this._b, this._a);
            var secondHex8String = hex8String;
            var gradientType = this._gradientType ? "GradientType = 1, " : "";

if (secondColor) {
                var s = tinycolor(secondColor);
                secondHex8String = s.toHex8String();
            }

return "progid:DXImageTransform.Microsoft.gradient("+gradientType+"startColorstr="+hex8String+",endColorstr="+secondHex8String+")";
        },
        toString: function(format) {
            var formatSet = !!format;
            format = format || this._format;

var formattedString = false;
            var hasAlpha = this._a < 1 && this._a >= 0;
            var needsAlphaFormat = !formatSet && hasAlpha && (format === "hex" || format === "hex6" || format === "hex3" || format === "name");

if (needsAlphaFormat) {
                // Special case for "transparent", all other non-alpha formats
                // will return rgba when there is transparency.
                if (format === "name" && this._a === 0) {
                    return this.toName();
                }
                return this.toRgbString();
            }
            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 === "hex8") {
                formattedString = this.toHex8String();
            }
            if (format === "name") {
                formattedString = this.toName();
            }
            if (format === "hsl") {
                formattedString = this.toHslString();
            }
            if (format === "hsv") {
                formattedString = this.toHsvString();
            }

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

_applyModification: function(fn, args) {
            var color = fn.apply(null, [this].concat([].slice.call(args)));
            this._r = color._r;
            this._g = color._g;
            this._b = color._b;
            this.setAlpha(color._a);
            return this;
        },
        lighten: function() {
            return this._applyModification(lighten, arguments);
        },
        brighten: function() {
            return this._applyModification(brighten, arguments);
        },
        darken: function() {
            return this._applyModification(darken, arguments);
        },
        desaturate: function() {
            return this._applyModification(desaturate, arguments);
        },
        saturate: function() {
            return this._applyModification(saturate, arguments);
        },
        greyscale: function() {
            return this._applyModification(greyscale, arguments);
        },
        spin: function() {
            return this._applyModification(spin, arguments);
        },

_applyCombination: function(fn, args) {
            return fn.apply(null, [this].concat([].slice.call(args)));
        },
        analogous: function() {
            return this._applyCombination(analogous, arguments);
        },
        complement: function() {
            return this._applyCombination(complement, arguments);
        },
        monochromatic: function() {
            return this._applyCombination(monochromatic, arguments);
        },
        splitcomplement: function() {
            return this._applyCombination(splitcomplement, arguments);
        },
        triad: function() {
            return this._applyCombination(triad, arguments);
        },
        tetrad: function() {
            return this._applyCombination(tetrad, arguments);
        }
    };

// 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"
    //     "#ff000000" or "ff000000"
    //     "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("");
    }
        // `rgbaToHex`
        // Converts an RGBA color plus alpha transparency to hex
        // Assumes r, g, b and a are contained in the set [0, 255]
        // Returns an 8 character hex
        function rgbaToHex(r, g, b, a) {

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

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>

function desaturate(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);
    }

function saturate(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);
    }

function greyscale(color) {
        return tinycolor(color).desaturate(100);
    }

function lighten (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);
    }

function brighten(color, amount) {
        amount = (amount === 0) ? 0 : (amount || 10);
        var rgb = tinycolor(color).toRgb();
        rgb.r = mathMax(0, mathMin(255, rgb.r - mathRound(255 * - (amount / 100))));
        rgb.g = mathMax(0, mathMin(255, rgb.g - mathRound(255 * - (amount / 100))));
        rgb.b = mathMax(0, mathMin(255, rgb.b - mathRound(255 * - (amount / 100))));
        return tinycolor(rgb);
    }

function darken (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);
    }

// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.
    // Values outside of this range will be wrapped into this range.
    function spin(color, amount) {
        var hsl = tinycolor(color).toHsl();
        var hue = (mathRound(hsl.h) + amount) % 360;
        hsl.h = hue < 0 ? 360 + hue : hue;
        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>

function complement(color) {
        var hsl = tinycolor(color).toHsl();
        hsl.h = (hsl.h + 180) % 360;
        return tinycolor(hsl);
    }

function analogous(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;
    }

function monochromatic(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;
    }

// Utility Functions
    // ---------------------

tinycolor.mix = function(color1, color2, amount) {
        amount = (amount === 0) ? 0 : (amount || 50);

var rgb1 = tinycolor(color1).toRgb();
        var rgb2 = tinycolor(color2).toRgb();

var p = amount / 100;
        var w = p * 2 - 1;
        var a = rgb2.a - rgb1.a;

var w1;

if (w * a == -1) {
            w1 = w;
        } else {
            w1 = (w + a) / (1 + w * a);
        }

w1 = (w1 + 1) / 2;

var w2 = 1 - w1;

var rgba = {
            r: rgb2.r * w1 + rgb1.r * w2,
            g: rgb2.g * w1 + rgb1.g * w2,
            b: rgb2.b * w1 + rgb1.b * w2,
            a: rgb2.a * p  + rgb1.a * (1 - p)
        };

return tinycolor(rgba);
    };

// 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 c1 = tinycolor(color1);
        var c2 = tinycolor(color2);
        var rgb1 = c1.toRgb();
        var rgb2 = c2.toRgb();
        var brightnessA = c1.getBrightness();
        var brightnessB = c2.getBrightness();
        var colorDiff = (
            Math.max(rgb1.r, rgb2.r) - Math.min(rgb1.r, rgb2.r) +
            Math.max(rgb1.g, rgb2.g) - Math.min(rgb1.g, rgb2.g) +
            Math.max(rgb1.b, rgb2.b) - Math.min(rgb1.b, rgb2.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.isReadable("#000", "#111") => false
    tinycolor.isReadable = 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",
        rebeccapurple: "663399",
        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 a base-16 hex value into a base-10 integer
    function parseIntFromHex(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;
    }

// Converts a decimal to a hex value
    function convertDecimalToHex(d) {
        return Math.round(parseFloat(d) * 255).toString(16);
    }
    // Converts a hex value to a decimal
    function convertHexToDecimal(h) {
        return (parseIntFromHex(h) / 255);
    }

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),
            hsva: new RegExp("hsva" + PERMISSIVE_MATCH4),
            hex3: /^([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
            hex6: /^([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/,
            hex8: /^([0-9a-fA-F]{2})([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.hsva.exec(color))) {
            return { h: match[1], s: match[2], v: match[3], a: match[4] };
        }
        if ((match = matchers.hex8.exec(color))) {
            return {
                a: convertHexToDecimal(match[1]),
                r: parseIntFromHex(match[2]),
                g: parseIntFromHex(match[3]),
                b: parseIntFromHex(match[4]),
                format: named ? "name" : "hex8"
            };
        }
        if ((match = matchers.hex6.exec(color))) {
            return {
                r: parseIntFromHex(match[1]),
                g: parseIntFromHex(match[2]),
                b: parseIntFromHex(match[3]),
                format: named ? "name" : "hex"
            };
        }
        if ((match = matchers.hex3.exec(color))) {
            return {
                r: parseIntFromHex(match[1] + '' + match[1]),
                g: parseIntFromHex(match[2] + '' + match[2]),
                b: parseIntFromHex(match[3] + '' + match[3]),
                format: named ? "name" : "hex"
            };
        }

return false;
    }

window.tinycolor = tinycolor;
    })();

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

});