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spectrum.js
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//Original Branch Details
// Spectrum Colorpicker v1.7.1
// https://github.com/bgrins/spectrum
// Author: Brian Grinstead
// License: MIT
//Branched Details
//Spectrum Colorpicker Accessibile v1.0.0
//https://github.com/NickersWeb/spectrum
//Author: Nick Webber
//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;
}
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,
inputAriaLabel: "Enter a color",
paletteAriaLabel: "Color palette",
initialSwatchAriaLabel: "Initial color",
currentSwatchAriaLabel: "Current color",
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 role='button' aria-pressed='false' aria-label='Colour Picker' class='sp-replacer' tabindex='0'>",
"<div class='sp-preview'><div class='sp-preview-inner'></div></div>",
"<div class='sp-dd'>▼</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' tabindex='0'></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 tabindex='0' 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 paletteTemplate(p, color, className, opts) {
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 sp-thumb-focus" : "";
var formattedString = tiny.toString(opts.preferredFormat || "rgb");
var swatchStyle = rgbaSupport ? ("background-color:" + tiny.toRgbString()) : "filter:" + tiny.toFilter();
html.push('<span tabindex="0" title="' + formattedString + '" data-color="' + tiny.toRgbString() + '" class="' + c + '"><span class="sp-thumb-inner" style="' + swatchStyle + ';" /></span>');
} else {
var cls = 'sp-clear-display';
html.push($('<div />')
.append($('<span data-color="" style="background-color:transparent;" class="' + cls + '"></span>')
.attr('title', opts.noColorSelectedText)
)
.html()
);
}
}
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,
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,
preferredFormat = opts.preferredFormat,
currentPreferredFormat = 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 = $.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 = $("body");
}
appendTo.append(container);
}
updateSelectionPaletteFromStorage();
offsetElement.bind("click.spectrum touchstart.spectrum", function (e) {
if (!disabled) {
toggle();
}
e.stopPropagation();
if (!$(e.target).is("input")) {
e.preventDefault();
}
});
offsetElement.bind("keypress.spectrum", function (e) {
if (e.which === 13) {
if (!disabled) {
toggle();
}
e.stopPropagation();
if (!$(e.target).is("input")) {
e.preventDefault();
}
}
});
if (boundElement.is(":disabled") || (opts.disabled === true)) {
disable();
}
// Prevent clicks from bubbling up to document. This would cause it to be hidden.
container.click(stopPropagation);
// Handle arrow keys and Enter -- for keyboard navigation
paletteContainer.keydown(function (e) {
var focusedColor;
// Arrow key
if ($.inArray(e.keyCode, [37, 38, 39, 40]) >= 0) {
// Currently-focused color
focusedColor = $(this).find(".sp-thumb-focus");
var newFocusedColor;
if (focusedColor.length > 0) {
// Find the color above/below/before/after the currently-focused color
if (e.keyCode == 37 || e.keyCode == 39) {
// left or right
newFocusedColor = e.keyCode == 37 ? focusedColor.prev() : focusedColor.next();
}
else if (e.keyCode == 38 || e.keyCode == 40) {
// up or down
var row = e.keyCode == 38 ? focusedColor.parent().prev() : focusedColor.parent().next();
if (row.length > 0) {
newFocusedColor = row.children().eq(focusedColor.index());
}
}
}
else {
// No currently-focused color, so just choose the first one
newFocusedColor = $(this).find(".sp-thumb-el").first();
}
// Give focus to the new focused color
if (newFocusedColor && newFocusedColor.length > 0) {
newFocusedColor.focus();
focusedColor.removeClass("sp-thumb-focus");
newFocusedColor.addClass("sp-thumb-focus");
}
return false;
}
// Enter key
else if (e.keyCode == 13) {
// Currently-focused color
focusedColor = $(this).find(".sp-thumb-focus");
if (focusedColor) {
set(focusedColor.data("color"));
move();
updateOriginalInput(true);
if (opts.hideAfterPaletteSelect) {
hide();
}
}
return false;
}
});
// Handle user typed input
textInput.change(setFromTextInput);
textInput.bind("paste", function () {
setTimeout(setFromTextInput, 1);
});
textInput.keydown(function (e) { if (e.keyCode == 13) { setFromTextInput(); } });
cancelButton.text(opts.cancelText);
cancelButton.bind("click.spectrum", function (e) {
e.stopPropagation();
e.preventDefault();
revert();
hide();
replacer.focus();
});
clearButton.attr("title", opts.clearText);
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.text(opts.chooseText);
chooseButton.bind("click.spectrum", function (e) {
e.stopPropagation();
e.preventDefault();
if (IE && textInput.is(":focus")) {
textInput.trigger('change');
}
if (isValid()) {
updateOriginalInput(true);
hide();
replacer.focus();
}
});
toggleButton.text(opts.showPaletteOnly ? opts.togglePaletteMoreText : opts.togglePaletteLessText);
toggleButton.bind("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 = preferredFormat || tinycolor(initialColor).format;
addColorToSelectionPalette(initialColor);
}
else {
updateUI();
}
if (flat) {
show();
}
function paletteElementKeyPress(e) {
if (e.which === 13) {
if (e.data && e.data.ignore) {
set($(e.target).closest(".sp-thumb-el").data("color"));
move();
}
else {
set($(e.target).closest(".sp-thumb-el").data("color"));
move();
updateOriginalInput(true);
if (opts.hideAfterPaletteSelect) {
hide();
}
}
return false;
}
}
function paletteElementClick(e) {
if (e.data && e.data.ignore) {
set($(e.target).closest(".sp-thumb-el").data("color"));
move();
}
else {
set($(e.target).closest(".sp-thumb-el").data("color"));
move();
updateOriginalInput(true);
if (opts.hideAfterPaletteSelect) {
hide();
}
}
return false;
}
var paletteEvent = "";
if (IE) {
paletteEvent = "mousedown.spectrum"
} else {
paletteEvent = "click.spectrum touchstart.spectrum"
}
paletteContainer.delegate(".sp-thumb-el", "keydown.spectrum", paletteElementKeyPress);
paletteContainer.delegate(".sp-thumb-el", paletteEvent, paletteElementClick);
initialColorContainer.delegate(".sp-thumb-el:nth-child(1)", "keydown.spectrum", { ignore: true }, paletteElementKeyPress);
initialColorContainer.delegate(".sp-thumb-el:nth-child(1)", paletteEvent, { 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(""));
paletteContainer.attr("aria-label", opts.paletteAriaLabel);
}
function drawInitial() {
if (opts.showInitial) {
var initial = colorOnShow;
var current = get();
initialColorContainer.html(paletteTemplate([initial, current], current, "sp-palette-row-initial", opts));
// Accessibility for initial color
var thumbs = initialColorContainer.find('.sp-thumb-el');
if (thumbs.length === 2) {
$(thumbs[0]).attr("aria-label", opts.initialSwatchAriaLabel);
$(thumbs[1]).attr("aria-label", opts.currentSwatchAriaLabel);
// Clicking Enter on the Initial color selects it
$(thumbs[0]).keydown(function (e) {
if (e.keyCode == 13) {
set($(e.target).closest(".sp-thumb-el").data("color"));
move();
}
});
}
}
}
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);
updateOriginalInput(true);
}
else {
var tiny = tinycolor(value);
if (tiny.isValid()) {
set(tiny);
updateOriginalInput(true);
}
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).bind("keydown.spectrum", onkeydown);
$(doc).bind("click.spectrum", clickout);
$(doc).bind("keypress.spectrum", clickout);
$(window).bind("resize.spectrum", resize);
replacer.addClass("sp-active");
replacer.attr("aria-pressed", "true");
container.removeClass("sp-hidden");
reflow();
updateUI();
colorOnShow = get();
drawInitial();
callbacks.show(colorOnShow);
boundElement.trigger('show.spectrum', [colorOnShow]);
// Set focus on selected color to start with
var focused = paletteContainer.find(".sp-thumb-focus");
if (focused != null && focused.length > 0) {
focused.focus();
} else {
paletteContainer.find(".sp-thumb-el").first().focus();
}
}
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).unbind("keydown.spectrum", onkeydown);
$(doc).unbind("click.spectrum", clickout);
$(doc).unbind("click.keypress", clickout);
$(window).unbind("resize.spectrum", resize);
replacer.removeClass("sp-active");
replacer.attr("aria-pressed", "false");
container.addClass("sp-hidden");
callbacks.hide(get());
boundElement.trigger('hide.spectrum', [get()]);
}
function revert() {
set(colorOnShow, 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 = 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 * 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");
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);
textInput.attr("aria-label", opts.inputAriaLabel);
}
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 = '',