text: // DO NOT EDIT THIS FILE, edit infrastructure/ace/www/colorutils.js
  // THIS FILE IS ALSO SERVED AS CLIENT-SIDE JS
  /**
   * Copyright 2009 Google Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS-IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  var colorutils = {};
  
  // "#ffffff" or "#fff" or "ffffff" or "fff" to [1.0, 1.0, 1.0]
  colorutils.css2triple = function(cssColor)
  {
    var sixHex = colorutils.css2sixhex(cssColor);
  
    function hexToFloat(hh)
    {
      return Number("0x" + hh) / 255;
    }
    return [hexToFloat(sixHex.substr(0, 2)), hexToFloat(sixHex.substr(2, 2)), hexToFloat(sixHex.substr(4, 2))];
  }
  
  // "#ffffff" or "#fff" or "ffffff" or "fff" to "ffffff"
  colorutils.css2sixhex = function(cssColor)
  {
    var h = /[0-9a-fA-F]+/.exec(cssColor)[0];
    if (h.length != 6)
    {
      var a = h.charAt(0);
      var b = h.charAt(1);
      var c = h.charAt(2);
      h = a + a + b + b + c + c;
    }
    return h;
  }
  
  // [1.0, 1.0, 1.0] -> "#ffffff"
  colorutils.triple2css = function(triple)
  {
    function floatToHex(n)
    {
      var n2 = colorutils.clamp(Math.round(n * 255), 0, 255);
      return ("0" + n2.toString(16)).slice(-2);
    }
    return "#" + floatToHex(triple[0]) + floatToHex(triple[1]) + floatToHex(triple[2]);
  }
  
  
  colorutils.clamp = function(v, bot, top)
  {
    return v < bot ? bot : (v > top ? top : v);
  };
  colorutils.min3 = function(a, b, c)
  {
    return (a < b) ? (a < c ? a : c) : (b < c ? b : c);
  };
  colorutils.max3 = function(a, b, c)
  {
    return (a > b) ? (a > c ? a : c) : (b > c ? b : c);
  };
  colorutils.colorMin = function(c)
  {
    return colorutils.min3(c[0], c[1], c[2]);
  };
  colorutils.colorMax = function(c)
  {
    return colorutils.max3(c[0], c[1], c[2]);
  };
  colorutils.scale = function(v, bot, top)
  {
    return colorutils.clamp(bot + v * (top - bot), 0, 1);
  };
  colorutils.unscale = function(v, bot, top)
  {
    return colorutils.clamp((v - bot) / (top - bot), 0, 1);
  };
  
  colorutils.scaleColor = function(c, bot, top)
  {
    return [colorutils.scale(c[0], bot, top), colorutils.scale(c[1], bot, top), colorutils.scale(c[2], bot, top)];
  }
  
  colorutils.unscaleColor = function(c, bot, top)
  {
    return [colorutils.unscale(c[0], bot, top), colorutils.unscale(c[1], bot, top), colorutils.unscale(c[2], bot, top)];
  }
  
  colorutils.luminosity = function(c)
  {
    // rule of thumb for RGB brightness; 1.0 is white
    return c[0] * 0.30 + c[1] * 0.59 + c[2] * 0.11;
  }
  
  colorutils.saturate = function(c)
  {
    var min = colorutils.colorMin(c);
    var max = colorutils.colorMax(c);
    if (max - min <= 0) return [1.0, 1.0, 1.0];
    return colorutils.unscaleColor(c, min, max);
  }
  
  colorutils.blend = function(c1, c2, t)
  {
    return [colorutils.scale(t, c1[0], c2[0]), colorutils.scale(t, c1[1], c2[1]), colorutils.scale(t, c1[2], c2[2])];
  }
  