color.js

SugarCRM5.1 开源PHP客户关系管理系统

/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
YAHOO.util.Color=new function(){this.hsv2rgb=function(h,s,v){var r,g,b;if(s==0){r=v*255;g=v*255;b=v*255;}else{var var_h=h*6;if(var_h==6){var_h=0;}
var var_i=Math.floor(var_h);var var_1=v*(1-s);var var_2=v*(1-s*(var_h-var_i));var var_3=v*(1-s*(1-(var_h-var_i)));if(var_i==0){var_r=v;var_g=var_3;var_b=var_1;}else if(var_i==1){var_r=var_2;var_g=v;var_b=var_1;}else if(var_i==2){var_r=var_1;var_g=v;var_b=var_3}else if(var_i==3){var_r=var_1;var_g=var_2;var_b=v;}else if(var_i==4){var_r=var_3;var_g=var_1;var_b=v;}else{var_r=v;var_g=var_1;var_b=var_2}
r=var_r*255
g=var_g*255
b=var_b*255}
return[Math.round(r),Math.round(g),Math.round(b)];};this.rgb2hex=function(r,g,b){return this.toHex(r)+this.toHex(g)+this.toHex(b);};this.hexchars="0123456789ABCDEF";this.toHex=function(n){n=n||0;n=parseInt(n,10);if(isNaN(n))n=0;n=Math.round(Math.min(Math.max(0,n),255));return this.hexchars.charAt((n-n%16)/16)+this.hexchars.charAt(n%16);};this.toDec=function(hexchar){return this.hexchars.indexOf(hexchar.toUpperCase());};this.hex2rgb=function(str){var rgb=[];rgb[0]=(this.toDec(str.substr(0,1))*16)+
this.toDec(str.substr(1,1));rgb[1]=(this.toDec(str.substr(2,1))*16)+
this.toDec(str.substr(3,1));rgb[2]=(this.toDec(str.substr(4,1))*16)+
this.toDec(str.substr(5,1));return rgb;};this.isValidRGB=function(a){if((!a[0]&&a[0]!=0)||isNaN(a[0])||a[0]<0||a[0]>255)return false;if((!a[1]&&a[1]!=0)||isNaN(a[1])||a[1]<0||a[1]>255)return false;if((!a[2]&&a[2]!=0)||isNaN(a[2])||a[2]<0||a[2]>255)return false;return true;};}