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colorFormat.js
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colorFormat.js
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/**
* 将颜色值转换为你需要的格式，现在仅支持浏览器支持的HEX/RGB/RGBA/HSL/HSLA等5种格式，任意格式之间互相转换。
* time：2018-09-07
* by 樊小书生: http://www.fxss5201.cn/
* github: https://github.com/fxss5201/colorFormat
*/
;(function (undefined) {
"use strict";
var _global;
/**
* 根据参数将颜色转换为对应的颜色格式（暂时只支持HEX/RGB/RGBA/HSL/HSLA）
* @param {string} options.color 待转换的颜色值
* @param {string} options.format 转换颜色的格式
*/
var colorFormat = function(options) {
return new _colorFormat(options);
};
var _colorFormat = function (options) {
var result,
color = options && options.color && options.color.replace(/\s/g, "").toLowerCase() || "#f00", // color ：默认值为 "#f00"
format = options && options.format && options.format.replace(/\s/g, "").toLowerCase() || "rgb", // format ：默认值为 "rgb"
rgbType = format.indexOf("rgba") == -1 ? 0 : 1, // rgbType 0表示rgb，1表示rgba
hslType = format.indexOf("hsla") == -1 ? 0 : 1; // hslType 0表示hsl，1表示hsla
if (color.indexOf("#") > -1){
if (format == "hex"){ // hex 转 hex
result = this.hexToRgb(color);
result = this.rgbToHex(result);
} else if (format.indexOf("rgb") > -1){ // hex 转 rgb/rgba
result = this.hexToRgb(color, rgbType);
} else if (format.indexOf("hsl") > -1) { // hex 转 hsl/hsla
result = this.hexToRgb(color);
result = this.rgbToHsl(result, hslType);
}
} else if (color.indexOf("rgb") > -1) {
result = this.getRgb(color, rgbType); // rgb 转 rgb/rgba
if (format == "hex") { // rgb/rgba 转 hex
result = this.rgbToHex(result);
} else if (format.indexOf("hsl") > -1) { // rgb/rgba 转 hsl
result = this.rgbToHsl(result, hslType);
}
} else if (color.indexOf("hsl") > -1) {
result = this.getHsl(color, hslType);
result = this.hslToRgb(result, rgbType); // hsl 转 rgb/rgba
if (format == "hex") { // hsl 转 hex
result = this.rgbToHex(result);
} else if (format.indexOf("hsl") > -1) { // hsl 转 hsl/hsla
result = this.rgbToHsl(result, hslType);
}
} else {
var defineColor = this.defineColor,
resultRgb;
for(var i = 0,len = defineColor.length; i < len; i++){
if(color == defineColor[i].name){
resultRgb = defineColor[i].hex;
break;
}
}
if(resultRgb && resultRgb.length > 0){
if (format == "hex"){ // hex 转 hex
result = this.hexToRgb(resultRgb);
result = this.rgbToHex(result);
} else if (format.indexOf("rgb") > -1){ // hex 转 rgb/rgba
result = this.hexToRgb(resultRgb, rgbType);
} else if (format.indexOf("hsl") > -1) { // hex 转 hsl/hsla
result = this.hexToRgb(resultRgb);
result = this.rgbToHsl(result, hslType);
}
}else{
alert("参数color暂未定义");
}
}
return result;
};
_colorFormat.prototype = {
constructor: this,
defineColor: [
{ name: "red", hex: "#f00" },
{ name: "orange", hex: "#ffa500" },
{ name: "yellow", hex: "#ff0" },
{ name: "green", hex: "#0f0" },
{ name: "cyan", hex: "#0ff" },
{ name: "blue", hex: "#00f" },
{ name: "violet", hex: "#ee82ee" },
{ name: "black", hex: "#000" },
{ name: "white", hex: "#fff" }
],
getRgb: function(rgb, type){
/**
* 传入字符串的rgb，如 "rgb(255,0,255)" ，获取rgb的各个参数值
*/
rgb = rgb.toLowerCase();
var flag = rgb.indexOf("rgba") == -1 ? 0 : 1; // flag 0表示rgb，1表示rgba
rgb = flag ? rgb.replace("rgba", "") : rgb.replace("rgb", "");
rgb = rgb.replace(/\s/g, "").split(",");
var red = Number(rgb[0].slice(1)),
green = Number(rgb[1]),
blue = flag ? Number(rgb[2]) : Number(rgb[2].slice(0, -1)),
opacity = flag ? (Number(rgb[3].slice(0, -1)) > 1 ? 1 : Number(rgb[3].slice(0, -1))) : 1;
return {
r: red,
g: green,
b: blue,
o: opacity,
complete: type ?
("rgba(" + [red, green, blue, opacity].join(",") + ")") :
("rgb(" + [red, green, blue].join(",") + ")")
}
},
getHsl: function(hsl, type){
/**
* 传入字符串的hsl，如 "hsl(300,100%,50%)" ，获取hsl的各个参数值
*/
hsl = hsl.toLowerCase();
var flag = hsl.indexOf("hsla") == -1 ? 0 : 1; // flag 0表示hsl，1表示hsla
hsl = flag ? hsl.replace("hsla", "") : hsl.replace("hsl", "");
hsl = hsl.replace(/\s/g, "").split(",");
var h = Number(hsl[0].slice(1)),
s = parseInt(hsl[1]),
l = flag ? parseInt(hsl[2]) : parseInt(hsl[2].slice(0, -1)),
opacity = flag ? (Number(hsl[3].slice(0, -1)) > 1 ? 1 : Number(hsl[3].slice(0, -1))) : 1;
return {
h: h,
s: s / 100,
l: l / 100,
o: opacity,
complete: type ?
("hsla(" + [h, s, l, opacity].join(",") + ")") :
("hsl(" + [h, s, l].join(",") + ")")
}
},
rgbToHex: function(rgb) {
/**
* 传入通过getRgb获取的rgb对象，将其转换为hex格式
*/
var red = Number(rgb.r).toString(16),
green = Number(rgb.g).toString(16),
blue = Number(rgb.b).toString(16),
opacity = Math.round(rgb.o * 255).toString(16),
simpleType = 0; // 转换之后的HEX是否可以简化，也就是说6位转为3位，或者8位转为4位
red.length < 2 && (red = 0 + red);
green.length < 2 && (green = 0 + green);
blue.length < 2 && (blue = 0 + blue);
opacity.length < 2 && (opacity = 0 + opacity);
red[0] == red[1] && green[0] == green[1] && blue[0] == blue[1] && opacity[0] == opacity[1] && (simpleType = 1);
return {
r: red,
g: green,
b: blue,
o: opacity,
complete: simpleType ?
("#" + red[0] + green[0] + blue[0] + (rgb.o == 1 ? "" : opacity)) :
("#" + red + green + blue + (rgb.o == 1 ? "" : opacity))
}
},
rgbToHsl: function (rgb, type) {
/**
* 传入通过getRgb获取的rgb对象，将其转换为hsl格式
*/
var r = Number(rgb.r) / 255,
g = Number(rgb.g) / 255,
b = Number(rgb.b) / 255,
o = Number(rgb.o),
max = Math.max(r, g, b),
min = Math.min(r, g, b),
h, s, l = (max + min) / 2;
if (max == min) {
h = s = 0;
} else {
var d = max - min;
s = l < 0.5 ? d / (max + min) : d / (2 - max - min);
switch (max) {
case r: h = (g - b) / d; break;
case g: h = (b - r) / d + 2; break;
case b: h = (r - g) / d + 4; break;
}
h = h * 60;
h = h < 0 ? h + 360 : h;
}
h = Math.round(h);
s = Math.round(s * 100) + "%";
l = Math.round(l * 100) + "%";
return {
h: h,
s: s,
l: l,
o: o,
complete: type ?
("hsla(" + [h, s, l, o].join(",") + ")") :
("hsl(" + [h, s, l].join(",") + ")")
}
},
hexToRgb: function(hex, type) {
/**
* 传入hex格式，如 "#ff00ff" ，转换为rgb格式
*/
hex = hex.replace("#", "");
var red, green, blue, opacity;
var hexsplit = hex.split("");
if (hex.length == 3) {
red = parseInt(hexsplit[0] + hexsplit[0], 16);
green = parseInt(hexsplit[1] + hexsplit[1], 16);
blue = parseInt(hexsplit[2] + hexsplit[2], 16);
opacity = 1;
} else if (hex.length == 4) {
red = parseInt(hexsplit[0] + hexsplit[0], 16);
green = parseInt(hexsplit[1] + hexsplit[1], 16);
blue = parseInt(hexsplit[2] + hexsplit[2], 16);
opacity = Math.round(parseInt(hexsplit[3] + hexsplit[3], 16) / 255 * 100) / 100;
} else if (hex.length == 6) {
red = parseInt(hexsplit[0] + hexsplit[1], 16);
green = parseInt(hexsplit[2] + hexsplit[3], 16);
blue = parseInt(hexsplit[4] + hexsplit[5], 16);
opacity = 1;
} else if (hex.length == 8) {
red = parseInt(hexsplit[0] + hexsplit[1], 16);
green = parseInt(hexsplit[2] + hexsplit[3], 16);
blue = parseInt(hexsplit[4] + hexsplit[5], 16);
opacity = Math.round(parseInt(hexsplit[6] + hexsplit[7], 16) / 255 * 100) / 100;
}
return {
r: red,
g: green,
b: blue,
o: opacity,
complete: type ?
("rgba(" + [red, green, blue, opacity].join(",") + ")") :
("rgb(" + [red, green, blue].join(",") + ")")
}
},
hslToRgb: function(hsl, type) {
/**
* 传入通过getHsl获取的Hsl对象，将其转换为rgb格式
*/
var h = Number(hsl.h),
s = Number(hsl.s),
l = Number(hsl.l),
o = Number(hsl.o),
r, g, b;
if (s == 0) {
r = g = b = l;
} else {
var temp2 = l < 0.5 ? l * (1 + s) : l + s - l * s,
temp1 = 2 * l - temp2;
h /= 360;
var hue2rgb = function (p, q, t) {
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1 / 6) return p + (q - p) * 6 * t;
if (t < 1 / 2) return q;
if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
return p;
};
r = hue2rgb(temp1, temp2, h + 1 / 3);
g = hue2rgb(temp1, temp2, h);
b = hue2rgb(temp1, temp2, h - 1 / 3);
}
r = Math.round(r * 255);
g = Math.round(g * 255);
b = Math.round(b * 255);
return {
r: r,
g: g,
b: b,
o: o,
complete: type ?
("rgba(" + [r, g, b, o].join(",") + ")") :
("rgb(" + [r, g, b].join(",") + ")")
}
}
};
// 最后将插件对象暴露给全局对象
_global = (function(){ return this || (0, eval)('this'); }());
if (typeof module !== "undefined" && module.exports) {
module.exports = colorFormat;
} else if (typeof define === "function" && define.amd) {
define(function(){return colorFormat;});
} else {
!('colorFormat' in _global) && (_global.colorFormat = colorFormat);
}
}());