skins/color_utils.js

   1 // (c) Benoît PIN 2006-2007
   2 // http://plinn.org
   3 // Licence GPL
   4
   5 function HSVColor(h, s, v) {
   6         this.h = h; // 0-360°
   7         this.s = s; // 0-100%
   8         this.v = v; // 0-100%
   9 }
  10
  11 HSVColor.prototype.toRGBString = function() {
  12         var rgb = this.toRGB();
  13         return "rgb(" + String(rgb[0]) + ", " + String(rgb[1]) + ", " + String(rgb[2]) + ")";
  14 };
  15
  16 HSVColor.prototype.toRGB = function () {
  17         var h = this.h; var s = this.s/100.0;
  18         var v = this.v/100.0;
  19         if( s == 0 )                                            // achromatic (grey)
  20                 r = g = b = v;
  21
  22         h = h/60;                                                       // sector 0 to 5
  23         var i = Math.floor( h );
  24         var f = h - i;                                          // factorial part of h
  25         var p = v * ( 1 - s );
  26         var q = v * ( 1 - s * f );
  27         var t = v * ( 1 - s * ( 1 - f ) );
  28         switch( i ) {
  29                 case 0:
  30                         r = v;
  31                         g = t;
  32                         b = p;
  33                         break;
  34                 case 1:
  35                         r = q;
  36                         g = v;
  37                         b = p;
  38                         break;
  39                 case 2:
  40                         r = p;
  41                         g = v;
  42                         b = t;
  43                         break;
  44                 case 3:
  45                         r = p;
  46                         g = q;
  47                         b = v;
  48                         break;
  49                 case 4:
  50                         r = t;
  51                         g = p;
  52                         b = v;
  53                         break;
  54                 default:                                // case 5:
  55                         r = v;
  56                         g = p;
  57                         b = q;
  58                         break;
  59         }
  60
  61         r = Math.round(r*255);
  62         g = Math.round(g*255);
  63         b = Math.round(b*255);
  64         return [r, g, b];
  65 };
  66
  67
  68 function ColorIterator(baseH, baseS, baseV, step) {
  69         this.baseColor = new HSVColor(baseH, baseS, baseV);
  70         this.currentH = baseH;
  71         this.step = step;
  72 }
  73
  74 ColorIterator.prototype.next = function() {
  75         var c = new HSVColor(this.currentH, this.baseColor.s, this.baseColor.v);
  76         this.currentH += this.step;
  77
  78         if (this.currentH >= 360)
  79                 this.currentH -= 360;
  80
  81         return c;
  82 };
  83
  84 function setBorderColor(ob, colorString) {
  85         var s = ob.style;
  86         s.borderBottomColor = colorString;
  87         s.borderLeftColor = colorString;
  88         s.borderRightColor = colorString;
  89         s.borderTopColor = colorString;
  90 }
  91
  92
  93 function setBorderStyle(ob, borderStyle) {
  94         var s= ob.style;
  95         s.borderBottomStyle = borderStyle;
  96         s.borderLeftStyle = borderStyle;
  97         s.borderRightStyle = borderStyle;
  98         s.borderTopStyle = borderStyle;
  99 }
 100
 101
 102 function setBorderWidth(ob, borderWidth) {
 103         var s= ob.style;
 104         s.borderBottomWidth = borderWidth;
 105         s.borderLeftWidth = borderWidth;
 106         s.borderRightWidth = borderWidth;
 107         s.borderTopWidth = borderWidth;
 108 }
 109
 110 function zfill(number, digits) {
 111         number = Math.floor(number);
 112         var nStr = String(number);
 113         while (nStr.length < digits)
 114                 nStr = "0" + nStr;
 115         return nStr;
 116 }
 117