/
spectrum.js
executable file
·1566 lines (1349 loc) · 50 KB
/
spectrum.js
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// Spectrum: The No Hassle Colorpicker
// https://github.com/bgrins/spectrum
// Author: Brian Grinstead
// License: MIT
// Requires: jQuery, spectrum.css
(function (window, $, undefined) {
var defaultOpts = {
// Events
beforeShow: noop,
move: noop,
change: noop,
show: noop,
hide: noop,
// Options
color: false,
flat: false,
showInput: false,
showButtons: true,
showInitial: false,
showPalette: false,
showPaletteOnly: false,
showSelectionPalette: true,
localStorageKey: false,
maxSelectionSize: 7,
cancelText: "cancel",
chooseText: "choose",
preferredFormat: false,
className: "",
theme: "sp-light",
palette: ['fff', '000'],
selectionPalette: []
},
spectrums = [],
IE = $.browser.msie,
replaceInput = [
"<div class='sp-replacer'>",
"<div class='sp-preview'></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'>",
"<div class='sp-palette-container'>",
"<div class='sp-palette sp-thumb sp-cf'></div>",
"</div>",
"<div class='sp-picker-container'>",
"<div class='sp-top sp-cf'>",
"<div class='sp-fill'></div>",
"<div class='sp-top-inner'>",
"<div class='sp-color'>",
"<div class='sp-sat'>",
"<div class='sp-val'>",
"<div class='sp-dragger'></div>",
"</div>",
"</div>",
"</div>",
"<div class='sp-hue'>",
"<div class='sp-slider'></div>",
gradientFix,
"</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 class='sp-choose'></button>",
"</div>",
"</div>",
"</div>"
].join("");
})(),
paletteTemplate = function (p, color, className) {
var html = [];
for (var i = 0; i < p.length; i++) {
var tiny = tinycolor(p[i]);
var c = tiny.toHsl().l < .5 ? "sp-thumb-dark" : "sp-thumb-light";
c += (tinycolor.equals(color, p[i])) ? " sp-thumb-active" : "";
html.push('<span title="' + tiny.toHexString() + '" data-color="' + tiny.toHexString() + '" style="background-color:' + tiny.toRgbString() + ';" class="' + c + '"></span>');
}
return "<div class='sp-cf " + className + "'>" + html.join('') + "</div>";
};
function hideAll() {
for (var i = 0; i < spectrums.length; i++) {
if (spectrums[i]) {
spectrums[i].hide();
}
}
}
function instanceOptions(o, callbackContext) {
var opts = $.extend({}, defaultOpts, o);
opts.callbacks = {
'move': bind(opts.move, callbackContext),
'change': bind(opts.change, callbackContext),
'show': bind(opts.show, callbackContext),
'hide': bind(opts.hide, callbackContext),
'beforeShow': bind(opts.beforeShow, callbackContext)
};
return opts;
}
function spectrum(element, o) {
var opts = instanceOptions(o, element),
flat = opts.flat,
showPaletteOnly = opts.showPaletteOnly,
showPalette = opts.showPalette || showPaletteOnly,
showInitial = opts.showInitial && !flat,
showInput = opts.showInput,
showSelectionPalette = opts.showSelectionPalette,
localStorageKey = opts.localStorageKey,
theme = opts.theme,
callbacks = opts.callbacks,
resize = throttle(reflow, 10),
visible = false,
dragWidth = 0,
dragHeight = 0,
dragHelperHeight = 0,
slideHeight = 0,
slideWidth = 0,
slideHelperHeight = 0,
currentHue = 0,
currentSaturation = 0,
currentValue = 0,
palette = opts.palette.slice(0),
paletteArray = $.isArray(palette[0]) ? palette : [palette],
selectionPalette = opts.selectionPalette.slice(0),
draggingClass = "sp-dragging";
var doc = element.ownerDocument,
body = doc.body,
boundElement = $(element),
container = $(markup, doc).addClass(theme),
dragger = container.find(".sp-color"),
dragHelper = container.find(".sp-dragger"),
slider = container.find(".sp-hue"),
slideHelper = container.find(".sp-slider"),
textInput = container.find(".sp-input"),
paletteContainer = container.find(".sp-palette"),
initialColorContainer = container.find(".sp-initial"),
cancelButton = container.find(".sp-cancel"),
chooseButton = container.find(".sp-choose"),
isInput = boundElement.is("input"),
shouldReplace = isInput && !flat,
replacer = (shouldReplace) ? $(replaceInput).addClass(theme) : $([]),
offsetElement = (shouldReplace) ? replacer : boundElement,
previewElement = replacer.find(".sp-preview"),
initialColor = opts.color || (isInput && boundElement.val()),
colorOnShow = false,
preferredFormat = opts.preferredFormat,
currentPreferredFormat = preferredFormat,
clickoutFiresChange = !opts.showButtons;
chooseButton.text(opts.chooseText);
cancelButton.text(opts.cancelText);
function initialize() {
if (IE) {
container.find("*:not(input)").attr("unselectable", "on");
}
container.toggleClass("sp-flat", flat);
container.toggleClass("sp-input-disabled", !showInput);
container.toggleClass("sp-buttons-disabled", !opts.showButtons || flat);
container.toggleClass("sp-palette-disabled", !showPalette);
container.toggleClass("sp-palette-only", showPaletteOnly);
container.toggleClass("sp-initial-disabled", !showInitial);
container.addClass(opts.className);
if (shouldReplace) {
boundElement.hide().after(replacer);
}
if (flat) {
boundElement.after(container).hide();
}
else {
$(body).append(container.hide());
}
if (localStorageKey && window.localStorage) {
try {
selectionPalette = window.localStorage[localStorageKey].split(",");
}
catch (e) {
}
}
offsetElement.bind("click.spectrum touchstart.spectrum", function (e) {
toggle();
e.stopPropagation();
if (!$(e.target).is("input")) {
e.preventDefault();
}
});
// Prevent clicks from bubbling up to document. This would cause it to be hidden.
container.click(stopPropagation);
// Handle user typed input
textInput.change(setFromTextInput);
textInput.bind("paste", function () {
setTimeout(setFromTextInput, 1);
});
textInput.keydown(function (e) { if (e.keyCode == 13) { setFromTextInput(); } });
cancelButton.bind("click.spectrum", function (e) {
e.stopPropagation();
e.preventDefault();
hide();
});
chooseButton.bind("click.spectrum", function (e) {
e.stopPropagation();
e.preventDefault();
if (isValid()) {
updateOriginalInput();
hide();
}
});
draggable(slider, function (dragX, dragY) {
currentHue = (dragY / slideHeight);
move();
}, dragStart, dragStop);
draggable(dragger, function (dragX, dragY) {
currentSaturation = dragX / dragWidth;
currentValue = (dragHeight - dragY) / dragHeight;
move();
}, dragStart, dragStop);
if (!!initialColor) {
set(initialColor, true);
addColorToSelectionPalette(initialColor);
}
else {
updateUI();
}
if (flat) {
show();
}
function palletElementClick(e) {
if (e.data && e.data.ignore) {
set($(this).data("color"), true);
move();
}
else {
set($(this).data("color"));
move();
hide();
}
return false;
}
var paletteEvent = IE ? "mousedown.spectrum" : "click.spectrum touchstart.spectrum";
paletteContainer.delegate("span", paletteEvent, palletElementClick);
initialColorContainer.delegate("span::nth-child(1)", paletteEvent, { ignore: true }, palletElementClick);
}
function addColorToSelectionPalette(color) {
if (showSelectionPalette) {
selectionPalette.push(tinycolor(color).toHexString());
if (localStorageKey && window.localStorage) {
window.localStorage[localStorageKey] = selectionPalette.join(",");
}
}
}
function getUniqueSelectionPalette() {
var unique = [];
var p = selectionPalette;
var paletteLookup = {};
if (showPalette) {
for (var i = 0; i < paletteArray.length; i++) {
for (var j = 0; j < paletteArray[i].length; j++) {
var hex = tinycolor(paletteArray[i][j]).toHexString();
paletteLookup[hex] = true;
}
}
for (var i = 0; i < p.length; i++) {
var color = tinycolor(p[i]);
var hex = color.toHexString();
if (!paletteLookup.hasOwnProperty(hex)) {
unique.push(p[i]);
paletteLookup[hex] = true;
}
}
}
return unique.reverse().slice(0, opts.maxSelectionSize);
}
function drawPalette() {
var currentColor = get();
var html = $.map(paletteArray, function (palette, i) {
return paletteTemplate(palette, currentColor, "sp-palette-row sp-palette-row-" + i);
});
if (selectionPalette) {
html.push(paletteTemplate(getUniqueSelectionPalette(), currentColor, "sp-palette-row sp-palette-row-selection"));
}
paletteContainer.html(html.join(""));
}
function drawInitial() {
if (showInitial) {
var initial = colorOnShow;
var current = get();
initialColorContainer.html(paletteTemplate([initial, current], current, "sp-palette-row-initial"));
}
}
function dragStart() {
if (dragHeight === 0 || dragWidth === 0 || slideHeight === 0) {
reflow();
}
container.addClass(draggingClass);
}
function dragStop() {
container.removeClass(draggingClass);
}
function setFromTextInput() {
var tiny = tinycolor(textInput.val());
if (tiny.ok) {
set(tiny, true);
}
else {
textInput.addClass("sp-validation-error");
}
}
function toggle() {
(visible) ? hide() : show();
}
function show() {
if (visible) {
reflow();
return;
}
if (callbacks.beforeShow(get()) === false) return;
hideAll();
visible = true;
$(doc).bind("click.spectrum", hide);
$(window).bind("resize.spectrum", resize);
replacer.addClass("sp-active");
container.show();
if (showPalette) {
drawPalette();
}
reflow();
updateUI();
colorOnShow = get();
drawInitial();
callbacks.show(colorOnShow);
}
function hide() {
if (!visible || flat) { return; }
visible = false;
$(doc).unbind("click.spectrum", hide);
$(window).unbind("resize.spectrum", resize);
replacer.removeClass("sp-active");
container.hide();
var colorHasChanged = !tinycolor.equals(get(), colorOnShow);
if (colorHasChanged) {
if (clickoutFiresChange) {
updateOriginalInput();
}
else {
revert();
}
}
callbacks.hide(get());
}
function revert() {
set(colorOnShow, true, true);
}
function set(color, ignoreChange, ignoreFormatChange) {
if (tinycolor.equals(color, get())) {
return;
}
var newColor = tinycolor(color);
var newHsv = newColor.toHsv();
currentHue = newHsv.h;
currentSaturation = newHsv.s;
currentValue = newHsv.v;
updateUI();
if (!ignoreFormatChange) {
currentPreferredFormat = preferredFormat || newColor.format;
}
// set can be called from a default value, don't want to trigger a change in that case
if (!ignoreChange && !tinycolor.equals(color, colorOnShow)) {
updateOriginalInput();
}
}
function get() {
return tinycolor.fromRatio({ h: currentHue, s: currentSaturation, v: currentValue });
}
function isValid() {
return !textInput.hasClass("sp-validation-error");
}
function move() {
updateUI();
callbacks.move(get());
}
function updateUI() {
textInput.removeClass("sp-validation-error");
updateHelperLocations();
// Update dragger background color (gradients take care of saturation and value).
var flatColor = tinycolor({ h: currentHue, s: "1.0", v: "1.0" });
dragger.css("background-color", flatColor.toHexString());
var realColor = get(),
realHex = realColor.toHexString();
// Update the replaced elements background color (with actual selected color)
previewElement.css("background-color", realHex);
// Update the text entry input as it changes happen
if (showInput) {
textInput.val(realColor.toString(currentPreferredFormat));
}
if (showPalette) {
drawPalette();
}
drawInitial();
}
function updateHelperLocations() {
var h = currentHue;
var s = currentSaturation;
var v = currentValue;
// Where to show the little circle in that displays your current selected color
var dragX = s * dragWidth;
var dragY = dragHeight - (v * dragHeight);
dragX = Math.max(
-dragHelperHeight,
Math.min(dragWidth - dragHelperHeight, dragX - dragHelperHeight)
);
dragY = Math.max(
-dragHelperHeight,
Math.min(dragHeight - dragHelperHeight, dragY - dragHelperHeight)
);
dragHelper.css({
"top": dragY,
"left": dragX
});
// Where to show the bar that displays your current selected hue
var slideY = (currentHue) * slideHeight;
slideHelper.css({
"top": slideY - slideHelperHeight
});
}
function updateOriginalInput() {
var color = get();
if (isInput) {
boundElement.val(color.toString(currentPreferredFormat)).change();
}
colorOnShow = color;
// Update the selection palette with the current color
addColorToSelectionPalette(color);
callbacks.change(color);
}
function reflow() {
dragWidth = dragger.width();
dragHeight = dragger.height();
dragHelperHeight = dragHelper.height();
slideWidth = slider.width();
slideHeight = slider.height();
slideHelperHeight = slideHelper.height();
if (!flat) {
container.offset(getOffset(container, offsetElement));
}
updateHelperLocations();
}
function destroy() {
boundElement.show();
offsetElement.unbind("click.spectrum touchstart.spectrum");
container.remove();
replacer.remove();
spectrums[spect.id] = null;
}
initialize();
var spect = {
show: show,
hide: hide,
set: function (c) {
set(c, true);
},
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 inputWidth = input.outerWidth();
var inputHeight = input.outerHeight();
var doc = picker[0].ownerDocument;
var docElem = doc.documentElement;
var viewWidth = docElem.clientWidth + $(doc).scrollLeft();
var viewHeight = docElem.clientHeight + $(doc).scrollTop();
var offset = input.offset();
offset.top += inputHeight;
offset.left -=
Math.min(offset.left, (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ?
Math.abs(offset.left + dpWidth - viewWidth) : 0);
offset.top -=
Math.min(offset.top, ((offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ?
Math.abs(dpHeight + inputHeight - extraY) : extraY));
return offset;
}
/**
* noop - do nothing
*/
function noop() {
}
/**
* stopPropagation - makes the code only doing this a little easier to read in line
*/
function stopPropagation(e) {
e.stopPropagation();
}
/**
* Create a function bound to a given object
* Thanks to underscore.js
*/
function bind(func, obj) {
var slice = Array.prototype.slice;
var args = slice.call(arguments, 2);
return function () {
return func.apply(obj, args.concat(slice.call(arguments)));
}
}
/**
* Lightweight drag helper. Handles containment within the element, so that
* when dragging, the x is within [0,element.width] and y is within [0,element.height]
*/
function draggable(element, onmove, onstart, onstop) {
onmove = onmove || function () { };
onstart = onstart || function () { };
onstop = onstop || function () { };
var doc = element.ownerDocument || document;
var dragging = false;
var offset = {};
var maxHeight = 0;
var maxWidth = 0;
var IE = $.browser.msie;
var hasTouch = ('ontouchstart' in window);
var duringDragEvents = {};
duringDragEvents["selectstart"] = prevent;
duringDragEvents["dragstart"] = prevent;
duringDragEvents[(hasTouch ? "touchmove" : "mousemove")] = move;
duringDragEvents[(hasTouch ? "touchend" : "mouseup")] = stop;
function prevent(e) {
if (e.stopPropagation) {
e.stopPropagation();
}
if (e.preventDefault) {
e.preventDefault();
}
e.returnValue = false;
}
function move(e) {
if (dragging) {
// Mouseup happened outside of window
if (IE && !(document.documentMode >= 9) && !e.button) {
return stop();
}
var touches = e.originalEvent.touches;
var pageX = touches ? touches[0].pageX : e.pageX;
var pageY = touches ? touches[0].pageY : e.pageY;
var dragX = Math.max(0, Math.min(pageX - offset.left, maxWidth));
var dragY = Math.max(0, Math.min(pageY - offset.top, maxHeight));
if (hasTouch) {
// Stop scrolling in iOS
prevent(e);
}
onmove.apply(element, [dragX, dragY]);
}
}
function start(e) {
var rightclick = (e.which) ? (e.which == 3) : (e.button == 2);
var touches = e.originalEvent.touches;
if (!rightclick && !dragging) {
if (onstart.apply(element, arguments) !== false) {
dragging = true;
maxHeight = $(element).height();
maxWidth = $(element).width();
offset = $(element).offset();
$(doc).bind(duringDragEvents);
$(doc.body).addClass("sp-dragging");
if (!hasTouch) {
move(e);
}
prevent(e);
}
}
}
function stop() {
if (dragging) {
$(doc).unbind(duringDragEvents);
$(doc.body).removeClass("sp-dragging");
onstop.apply(element, arguments);
}
dragging = false;
}
$(element).bind(hasTouch ? "touchstart" : "mousedown", start);
}
function throttle(func, wait, debounce) {
var timeout;
return function () {
var context = this, args = arguments;
var throttler = function () {
timeout = null;
func.apply(context, args);
};
if (debounce) clearTimeout(timeout);
if (debounce || !timeout) timeout = setTimeout(throttler, wait);
};
}
/**
* Define a jQuery plugin
*/
var dataID = "spectrum.id";
$.fn.spectrum = function (opts, extra) {
if (typeof opts == "string") {
if (opts == "get") {
return spectrums[this.eq(0).data(dataID)].get();
} else if (opts == "container") {
return spectrums[$(this).data(dataID)].container;
}
return this.each(function () {
var spect = spectrums[$(this).data(dataID)];
if (spect) {
if (opts == "show") { spect.show(); }
if (opts == "hide") { spect.hide(); }
if (opts == "set") { spect.set(extra); }
if (opts == "destroy") {
spect.destroy();
$(this).removeData(dataID);
}
}
});
}
// Initializing a new one
return this.spectrum("destroy").each(function () {
var spect = spectrum(this, opts);
$(this).data(dataID, spect.id);
});
};
$.fn.spectrum.load = true;
$.fn.spectrum.loadOpts = {};
$.fn.spectrum.draggable = draggable;
$.fn.spectrum.processNativeColorInputs = function() {
var supportsColor = $("<input type='color' />")[0].type === "color";
if (!supportsColor) {
$("input[type=color]").spectrum({
preferredFormat: "hex6"
});
}
};
$(function () {
if ($.fn.spectrum.load) {
$.fn.spectrum.processNativeColorInputs();
}
});
})(this, jQuery);
// TinyColor.js - <https://github.com/bgrins/TinyColor> - 2011 Brian Grinstead - v0.5
(function (window) {
var trimLeft = /^[\s,#]+/,
trimRight = /\s+$/,
tinyCounter = 0,
math = Math,
mathRound = math.round,
mathMin = math.min,
mathMax = math.max,
mathRandom = math.random,
parseFloat = window.parseFloat;
function tinycolor(color, opts) {
// If input is already a tinycolor, return itself
if (typeof color == "object" && color.hasOwnProperty("_tc_id")) {
return color;
}
var rgb = inputToRGB(color);
var r = rgb.r, g = rgb.g, b = rgb.b, a = parseFloat(rgb.a), format = rgb.format;
return {
ok: rgb.ok,
format: format,
_tc_id: tinyCounter++,
alpha: a,
toHsv: function () {
var hsv = rgbToHsv(r, g, b);
return { h: hsv.h, s: hsv.s, v: hsv.v, a: a };
},
toHsvString: function () {
var hsv = rgbToHsv(r, g, b);
var h = mathRound(hsv.h * 360), s = mathRound(hsv.s * 100), v = mathRound(hsv.v * 100);
return (a == 1) ?
"hsv(" + h + ", " + s + "%, " + v + "%)" :
"hsva(" + h + ", " + s + "%, " + v + "%, " + a + ")";
},
toHsl: function () {
var hsl = rgbToHsl(r, g, b);
return { h: hsl.h, s: hsl.s, l: hsl.l, a: a };
},
toHslString: function () {
var hsl = rgbToHsl(r, g, b);
var h = mathRound(hsl.h * 360), s = mathRound(hsl.s * 100), l = mathRound(hsl.l * 100);
return (a == 1) ?
"hsl(" + h + ", " + s + "%, " + l + "%)" :
"hsla(" + h + ", " + s + "%, " + l + "%, " + a + ")";
},
toHex: function () {
return rgbToHex(r, g, b);
},
toHexString: function (force6Char) {
return '#' + rgbToHex(r, g, b, force6Char);
},
toRgb: function () {
return { r: mathRound(r), g: mathRound(g), b: mathRound(b), a: a };
},
toRgbString: function () {
return (a == 1) ?
"rgb(" + mathRound(r) + ", " + mathRound(g) + ", " + mathRound(b) + ")" :
"rgba(" + mathRound(r) + ", " + mathRound(g) + ", " + mathRound(b) + ", " + a + ")";
},
toName: function () {
return hexNames[rgbToHex(r, g, b)] || false;
},
toFilter: function () {
var hex = rgbToHex(r, g, b);
var alphaHex = Math.round(parseFloat(a) * 255).toString(16);
return "progid:DXImageTransform.Microsoft.gradient(startColorstr=#" +
alphaHex + hex + ",endColorstr=#" + alphaHex + hex + ")";
},
toString: function (format) {
format = format || this.format;
var formattedString = false;
if (format === "rgb") {
formattedString = this.toRgbString();
}
if (format === "hex") {
formattedString = this.toHexString();
}
if (format === "hex6") {
formattedString = this.toHexString(true);
}
if (format === "name") {
formattedString = this.toName();
}
if (format === "hsl") {
formattedString = this.toHslString();
}
if (format === "hsv") {
formattedString = this.toHsvString();
}
return formattedString || this.toHexString();
}
};
}
// If input is an object, force 1 into "1.0" to handle ratios properly
// String input requires "1.0" as input, so 1 will be treated as 1
tinycolor.fromRatio = function(color) {
if (typeof color == "object") {
for (var i in color) {
if (color[i] === 1) {
color[i] = "1.0";
}
}
}
return tinycolor(color);
}
// Given a string or object, convert that input to RGB
// Possible string inputs:
//
// "red"
// "#f00" or "f00"
// "#ff0000" or "ff0000"
// "rgb 255 0 0" or "rgb (255, 0, 0)"
// "rgb 1.0 0 0" or "rgb (1, 0, 0)"
// "rgba (255, 0, 0, 1)" or "rgba 255, 0, 0, 1"
// "rgba (1.0, 0, 0, 1)" or "rgba 1.0, 0, 0, 1"
// "hsl(0, 100%, 50%)" or "hsl 0 100% 50%"
// "hsla(0, 100%, 50%, 1)" or "hsla 0 100% 50%, 1"
// "hsv(0, 100%, 100%)" or "hsv 0 100% 100%"
//
function inputToRGB(color) {
var rgb = { r: 0, g: 0, b: 0 };
var a = 1;
var ok = false;
var format = false;
if (typeof color == "string") {
color = stringInputToObject(color);
}
if (typeof color == "object") {
if (color.hasOwnProperty("r") && color.hasOwnProperty("g") && color.hasOwnProperty("b")) {
rgb = rgbToRgb(color.r, color.g, color.b);
ok = true;
format = "rgb";
}
else if (color.hasOwnProperty("h") && color.hasOwnProperty("s") && color.hasOwnProperty("v")) {
rgb = hsvToRgb(color.h, color.s, color.v);
ok = true;
format = "hsv";
}
else if (color.hasOwnProperty("h") && color.hasOwnProperty("s") && color.hasOwnProperty("l")) {
var rgb = hslToRgb(color.h, color.s, color.l);
ok = true;
format = "hsl";
}
if (color.hasOwnProperty("a")) {
a = color.a;
}
}
rgb.r = mathMin(255, mathMax(rgb.r, 0));
rgb.g = mathMin(255, mathMax(rgb.g, 0));
rgb.b = mathMin(255, mathMax(rgb.b, 0));
// 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 in the conversion function
if (rgb.r < 1) { rgb.r = mathRound(rgb.r); }
if (rgb.g < 1) { rgb.g = mathRound(rgb.g); }
if (rgb.b < 1) { rgb.b = mathRound(rgb.b); }
return {
ok: ok,
format: (color && color.format) || format,
r: rgb.r,
g: rgb.g,
b: rgb.b,
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) {