wecui/packages/wecui-css/node_modules/rgb/index.js

一款基于Vue2.x版本的移动端web组件

/*
color
*/"use strict"

var colors = {
    maroon      : "#800000",
    red         : "#ff0000",
    orange      : "#ffA500",
    yellow      : "#ffff00",
    olive       : "#808000",
    purple      : "#800080",
    fuchsia     : "#ff00ff",
    white       : "#ffffff",
    lime        : "#00ff00",
    green       : "#008000",
    navy        : "#000080",
    blue        : "#0000ff",
    aqua        : "#00ffff",
    teal        : "#008080",
    black       : "#000000",
    silver      : "#c0c0c0",
    gray        : "#808080",
    transparent : "#0000"
}

var RGBtoRGB = function(r, g, b, a){
    if (a == null || a === "") a = 1
    r = parseFloat(r)
    g = parseFloat(g)
    b = parseFloat(b)
    a = parseFloat(a)
    if (!(r <= 255 && r >= 0 && g <= 255 && g >= 0 && b <= 255 && b >= 0 && a <= 1 && a >= 0)) return null

    return [Math.round(r), Math.round(g), Math.round(b), a]
}

var HEXtoRGB = function(hex){
    if (hex.length === 3) hex += "f"
    if (hex.length === 4){
        var h0 = hex.charAt(0),
            h1 = hex.charAt(1),
            h2 = hex.charAt(2),
            h3 = hex.charAt(3)

        hex = h0 + h0 + h1 + h1 + h2 + h2 + h3 + h3
    }
    if (hex.length === 6) hex += "ff"
    var rgb = []
    for (var i = 0, l = hex.length; i < l; i += 2) rgb.push(parseInt(hex.substr(i, 2), 16) / (i === 6 ? 255 : 1))
    return rgb
}

// HSL to RGB conversion from:
// http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
// thank you!

var HUEtoRGB = 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
}

var HSLtoRGB = function(h, s, l, a){
    var r, b, g
    if (a == null || a === "") a = 1
    h = parseFloat(h) / 360
    s = parseFloat(s) / 100
    l = parseFloat(l) / 100
    a = parseFloat(a) / 1
    if (h > 1 || h < 0 || s > 1 || s < 0 || l > 1 || l < 0 || a > 1 || a < 0) return null
    if (s === 0){
        r = b = g = l
    } else {
        var q = l < 0.5 ? l * (1 + s) : l + s - l * s
        var p = 2 * l - q
        r = HUEtoRGB(p, q, h + 1 / 3)
        g = HUEtoRGB(p, q, h)
        b = HUEtoRGB(p, q, h - 1 / 3)
    }
    return [r * 255, g * 255, b * 255, a]
}

var keys = []
for (var c in colors) keys.push(c)

var shex  = "(?:#([a-f0-9]{3,8}))",
    sval  = "\\s*([.\\d%]+)\\s*",
    sop   = "(?:,\\s*([.\\d]+)\\s*)?",
    slist = "\\(" + [sval, sval, sval] + sop + "\\)",
    srgb  = "(?:rgb)a?",
    shsl  = "(?:hsl)a?",
    skeys = "(" + keys.join("|") + ")"


var xhex   = RegExp(shex, "i"),
    xrgb   = RegExp(srgb + slist, "i"),
    xhsl   = RegExp(shsl + slist, "i")

var color = function(input, array){
    if (input == null) return null
    input = (input + "").replace(/\s+/, "")

    var match = colors[input]
    if (match){
        return color(match, array)
    } else if (match = input.match(xhex)){
        input = HEXtoRGB(match[1])
    } else if (match = input.match(xrgb)){
        input = match.slice(1)
    } else if (match = input.match(xhsl)){
        input = HSLtoRGB.apply(null, match.slice(1))
    } else return null

    if (!(input && (input = RGBtoRGB.apply(null, input)))) return null
    if (array) return input
    if (input[3] === 1) input.splice(3, 1)
    return "rgb" + (input.length === 4 ? "a" : "") + "(" + input + ")"
}

var regexp = RegExp([skeys, shex, srgb + slist, shsl + slist].join("|"), "gi")

color.replace = function(string, method){
    if (!method) method = function(match){
        return color(match)
    }
    return (string + "").replace(regexp, method)
}

color.matches = function(string){
    return !!(string + "").match(regexp)
}

module.exports = color