Move ColorManager to ui

Part of #2005
Part of #1507

src/ui/ColorManager.test.ts

@@ -0,0 +1,313 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import jsdom = require('jsdom');
+import { assert } from 'chai';
+import { ColorManager } from './ColorManager';
+
+describe('ColorManager', () => {
+  let cm: ColorManager;
+  let dom: jsdom.JSDOM;
+  let document: Document;
+  let window: Window;
+
+  beforeEach(() => {
+    dom = new jsdom.JSDOM('');
+    window = dom.window;
+    document = window.document;
+    (<any>window).HTMLCanvasElement.prototype.getContext = () => ({
+      createLinearGradient(): any {
+        return null;
+      },
+
+      fillRect(): void { },
+
+      getImageData(): any {
+        return {data: [0, 0, 0, 0xFF]};
+      }
+    });
+    cm = new ColorManager(document, false);
+  });
+
+  describe('constructor', () => {
+    it('should fill all colors with values', () => {
+      for (const key of Object.keys(cm.colors)) {
+        if (key !== 'ansi') {
+          // A #rrggbb or rgba(...)
+          assert.ok((<any>cm.colors)[key].css.length >= 7);
+        }
+      }
+      assert.equal(cm.colors.ansi.length, 256);
+    });
+
+    it('should fill 240 colors with expected values', () => {
+      assert.equal(cm.colors.ansi[16].css, '#000000');
+      assert.equal(cm.colors.ansi[17].css, '#00005f');
+      assert.equal(cm.colors.ansi[18].css, '#000087');
+      assert.equal(cm.colors.ansi[19].css, '#0000af');
+      assert.equal(cm.colors.ansi[20].css, '#0000d7');
+      assert.equal(cm.colors.ansi[21].css, '#0000ff');
+      assert.equal(cm.colors.ansi[22].css, '#005f00');
+      assert.equal(cm.colors.ansi[23].css, '#005f5f');
+      assert.equal(cm.colors.ansi[24].css, '#005f87');
+      assert.equal(cm.colors.ansi[25].css, '#005faf');
+      assert.equal(cm.colors.ansi[26].css, '#005fd7');
+      assert.equal(cm.colors.ansi[27].css, '#005fff');
+      assert.equal(cm.colors.ansi[28].css, '#008700');
+      assert.equal(cm.colors.ansi[29].css, '#00875f');
+      assert.equal(cm.colors.ansi[30].css, '#008787');
+      assert.equal(cm.colors.ansi[31].css, '#0087af');
+      assert.equal(cm.colors.ansi[32].css, '#0087d7');
+      assert.equal(cm.colors.ansi[33].css, '#0087ff');
+      assert.equal(cm.colors.ansi[34].css, '#00af00');
+      assert.equal(cm.colors.ansi[35].css, '#00af5f');
+      assert.equal(cm.colors.ansi[36].css, '#00af87');
+      assert.equal(cm.colors.ansi[37].css, '#00afaf');
+      assert.equal(cm.colors.ansi[38].css, '#00afd7');
+      assert.equal(cm.colors.ansi[39].css, '#00afff');
+      assert.equal(cm.colors.ansi[40].css, '#00d700');
+      assert.equal(cm.colors.ansi[41].css, '#00d75f');
+      assert.equal(cm.colors.ansi[42].css, '#00d787');
+      assert.equal(cm.colors.ansi[43].css, '#00d7af');
+      assert.equal(cm.colors.ansi[44].css, '#00d7d7');
+      assert.equal(cm.colors.ansi[45].css, '#00d7ff');
+      assert.equal(cm.colors.ansi[46].css, '#00ff00');
+      assert.equal(cm.colors.ansi[47].css, '#00ff5f');
+      assert.equal(cm.colors.ansi[48].css, '#00ff87');
+      assert.equal(cm.colors.ansi[49].css, '#00ffaf');
+      assert.equal(cm.colors.ansi[50].css, '#00ffd7');
+      assert.equal(cm.colors.ansi[51].css, '#00ffff');
+      assert.equal(cm.colors.ansi[52].css, '#5f0000');
+      assert.equal(cm.colors.ansi[53].css, '#5f005f');
+      assert.equal(cm.colors.ansi[54].css, '#5f0087');
+      assert.equal(cm.colors.ansi[55].css, '#5f00af');
+      assert.equal(cm.colors.ansi[56].css, '#5f00d7');
+      assert.equal(cm.colors.ansi[57].css, '#5f00ff');
+      assert.equal(cm.colors.ansi[58].css, '#5f5f00');
+      assert.equal(cm.colors.ansi[59].css, '#5f5f5f');
+      assert.equal(cm.colors.ansi[60].css, '#5f5f87');
+      assert.equal(cm.colors.ansi[61].css, '#5f5faf');
+      assert.equal(cm.colors.ansi[62].css, '#5f5fd7');
+      assert.equal(cm.colors.ansi[63].css, '#5f5fff');
+      assert.equal(cm.colors.ansi[64].css, '#5f8700');
+      assert.equal(cm.colors.ansi[65].css, '#5f875f');
+      assert.equal(cm.colors.ansi[66].css, '#5f8787');
+      assert.equal(cm.colors.ansi[67].css, '#5f87af');
+      assert.equal(cm.colors.ansi[68].css, '#5f87d7');
+      assert.equal(cm.colors.ansi[69].css, '#5f87ff');
+      assert.equal(cm.colors.ansi[70].css, '#5faf00');
+      assert.equal(cm.colors.ansi[71].css, '#5faf5f');
+      assert.equal(cm.colors.ansi[72].css, '#5faf87');
+      assert.equal(cm.colors.ansi[73].css, '#5fafaf');
+      assert.equal(cm.colors.ansi[74].css, '#5fafd7');
+      assert.equal(cm.colors.ansi[75].css, '#5fafff');
+      assert.equal(cm.colors.ansi[76].css, '#5fd700');
+      assert.equal(cm.colors.ansi[77].css, '#5fd75f');
+      assert.equal(cm.colors.ansi[78].css, '#5fd787');
+      assert.equal(cm.colors.ansi[79].css, '#5fd7af');
+      assert.equal(cm.colors.ansi[80].css, '#5fd7d7');
+      assert.equal(cm.colors.ansi[81].css, '#5fd7ff');
+      assert.equal(cm.colors.ansi[82].css, '#5fff00');
+      assert.equal(cm.colors.ansi[83].css, '#5fff5f');
+      assert.equal(cm.colors.ansi[84].css, '#5fff87');
+      assert.equal(cm.colors.ansi[85].css, '#5fffaf');
+      assert.equal(cm.colors.ansi[86].css, '#5fffd7');
+      assert.equal(cm.colors.ansi[87].css, '#5fffff');
+      assert.equal(cm.colors.ansi[88].css, '#870000');
+      assert.equal(cm.colors.ansi[89].css, '#87005f');
+      assert.equal(cm.colors.ansi[90].css, '#870087');
+      assert.equal(cm.colors.ansi[91].css, '#8700af');
+      assert.equal(cm.colors.ansi[92].css, '#8700d7');
+      assert.equal(cm.colors.ansi[93].css, '#8700ff');
+      assert.equal(cm.colors.ansi[94].css, '#875f00');
+      assert.equal(cm.colors.ansi[95].css, '#875f5f');
+      assert.equal(cm.colors.ansi[96].css, '#875f87');
+      assert.equal(cm.colors.ansi[97].css, '#875faf');
+      assert.equal(cm.colors.ansi[98].css, '#875fd7');
+      assert.equal(cm.colors.ansi[99].css, '#875fff');
+      assert.equal(cm.colors.ansi[100].css, '#878700');
+      assert.equal(cm.colors.ansi[101].css, '#87875f');
+      assert.equal(cm.colors.ansi[102].css, '#878787');
+      assert.equal(cm.colors.ansi[103].css, '#8787af');
+      assert.equal(cm.colors.ansi[104].css, '#8787d7');
+      assert.equal(cm.colors.ansi[105].css, '#8787ff');
+      assert.equal(cm.colors.ansi[106].css, '#87af00');
+      assert.equal(cm.colors.ansi[107].css, '#87af5f');
+      assert.equal(cm.colors.ansi[108].css, '#87af87');
+      assert.equal(cm.colors.ansi[109].css, '#87afaf');
+      assert.equal(cm.colors.ansi[110].css, '#87afd7');
+      assert.equal(cm.colors.ansi[111].css, '#87afff');
+      assert.equal(cm.colors.ansi[112].css, '#87d700');
+      assert.equal(cm.colors.ansi[113].css, '#87d75f');
+      assert.equal(cm.colors.ansi[114].css, '#87d787');
+      assert.equal(cm.colors.ansi[115].css, '#87d7af');
+      assert.equal(cm.colors.ansi[116].css, '#87d7d7');
+      assert.equal(cm.colors.ansi[117].css, '#87d7ff');
+      assert.equal(cm.colors.ansi[118].css, '#87ff00');
+      assert.equal(cm.colors.ansi[119].css, '#87ff5f');
+      assert.equal(cm.colors.ansi[120].css, '#87ff87');
+      assert.equal(cm.colors.ansi[121].css, '#87ffaf');
+      assert.equal(cm.colors.ansi[122].css, '#87ffd7');
+      assert.equal(cm.colors.ansi[123].css, '#87ffff');
+      assert.equal(cm.colors.ansi[124].css, '#af0000');
+      assert.equal(cm.colors.ansi[125].css, '#af005f');
+      assert.equal(cm.colors.ansi[126].css, '#af0087');
+      assert.equal(cm.colors.ansi[127].css, '#af00af');
+      assert.equal(cm.colors.ansi[128].css, '#af00d7');
+      assert.equal(cm.colors.ansi[129].css, '#af00ff');
+      assert.equal(cm.colors.ansi[130].css, '#af5f00');
+      assert.equal(cm.colors.ansi[131].css, '#af5f5f');
+      assert.equal(cm.colors.ansi[132].css, '#af5f87');
+      assert.equal(cm.colors.ansi[133].css, '#af5faf');
+      assert.equal(cm.colors.ansi[134].css, '#af5fd7');
+      assert.equal(cm.colors.ansi[135].css, '#af5fff');
+      assert.equal(cm.colors.ansi[136].css, '#af8700');
+      assert.equal(cm.colors.ansi[137].css, '#af875f');
+      assert.equal(cm.colors.ansi[138].css, '#af8787');
+      assert.equal(cm.colors.ansi[139].css, '#af87af');
+      assert.equal(cm.colors.ansi[140].css, '#af87d7');
+      assert.equal(cm.colors.ansi[141].css, '#af87ff');
+      assert.equal(cm.colors.ansi[142].css, '#afaf00');
+      assert.equal(cm.colors.ansi[143].css, '#afaf5f');
+      assert.equal(cm.colors.ansi[144].css, '#afaf87');
+      assert.equal(cm.colors.ansi[145].css, '#afafaf');
+      assert.equal(cm.colors.ansi[146].css, '#afafd7');
+      assert.equal(cm.colors.ansi[147].css, '#afafff');
+      assert.equal(cm.colors.ansi[148].css, '#afd700');
+      assert.equal(cm.colors.ansi[149].css, '#afd75f');
+      assert.equal(cm.colors.ansi[150].css, '#afd787');
+      assert.equal(cm.colors.ansi[151].css, '#afd7af');
+      assert.equal(cm.colors.ansi[152].css, '#afd7d7');
+      assert.equal(cm.colors.ansi[153].css, '#afd7ff');
+      assert.equal(cm.colors.ansi[154].css, '#afff00');
+      assert.equal(cm.colors.ansi[155].css, '#afff5f');
+      assert.equal(cm.colors.ansi[156].css, '#afff87');
+      assert.equal(cm.colors.ansi[157].css, '#afffaf');
+      assert.equal(cm.colors.ansi[158].css, '#afffd7');
+      assert.equal(cm.colors.ansi[159].css, '#afffff');
+      assert.equal(cm.colors.ansi[160].css, '#d70000');
+      assert.equal(cm.colors.ansi[161].css, '#d7005f');
+      assert.equal(cm.colors.ansi[162].css, '#d70087');
+      assert.equal(cm.colors.ansi[163].css, '#d700af');
+      assert.equal(cm.colors.ansi[164].css, '#d700d7');
+      assert.equal(cm.colors.ansi[165].css, '#d700ff');
+      assert.equal(cm.colors.ansi[166].css, '#d75f00');
+      assert.equal(cm.colors.ansi[167].css, '#d75f5f');
+      assert.equal(cm.colors.ansi[168].css, '#d75f87');
+      assert.equal(cm.colors.ansi[169].css, '#d75faf');
+      assert.equal(cm.colors.ansi[170].css, '#d75fd7');
+      assert.equal(cm.colors.ansi[171].css, '#d75fff');
+      assert.equal(cm.colors.ansi[172].css, '#d78700');
+      assert.equal(cm.colors.ansi[173].css, '#d7875f');
+      assert.equal(cm.colors.ansi[174].css, '#d78787');
+      assert.equal(cm.colors.ansi[175].css, '#d787af');
+      assert.equal(cm.colors.ansi[176].css, '#d787d7');
+      assert.equal(cm.colors.ansi[177].css, '#d787ff');
+      assert.equal(cm.colors.ansi[178].css, '#d7af00');
+      assert.equal(cm.colors.ansi[179].css, '#d7af5f');
+      assert.equal(cm.colors.ansi[180].css, '#d7af87');
+      assert.equal(cm.colors.ansi[181].css, '#d7afaf');
+      assert.equal(cm.colors.ansi[182].css, '#d7afd7');
+      assert.equal(cm.colors.ansi[183].css, '#d7afff');
+      assert.equal(cm.colors.ansi[184].css, '#d7d700');
+      assert.equal(cm.colors.ansi[185].css, '#d7d75f');
+      assert.equal(cm.colors.ansi[186].css, '#d7d787');
+      assert.equal(cm.colors.ansi[187].css, '#d7d7af');
+      assert.equal(cm.colors.ansi[188].css, '#d7d7d7');
+      assert.equal(cm.colors.ansi[189].css, '#d7d7ff');
+      assert.equal(cm.colors.ansi[190].css, '#d7ff00');
+      assert.equal(cm.colors.ansi[191].css, '#d7ff5f');
+      assert.equal(cm.colors.ansi[192].css, '#d7ff87');
+      assert.equal(cm.colors.ansi[193].css, '#d7ffaf');
+      assert.equal(cm.colors.ansi[194].css, '#d7ffd7');
+      assert.equal(cm.colors.ansi[195].css, '#d7ffff');
+      assert.equal(cm.colors.ansi[196].css, '#ff0000');
+      assert.equal(cm.colors.ansi[197].css, '#ff005f');
+      assert.equal(cm.colors.ansi[198].css, '#ff0087');
+      assert.equal(cm.colors.ansi[199].css, '#ff00af');
+      assert.equal(cm.colors.ansi[200].css, '#ff00d7');
+      assert.equal(cm.colors.ansi[201].css, '#ff00ff');
+      assert.equal(cm.colors.ansi[202].css, '#ff5f00');
+      assert.equal(cm.colors.ansi[203].css, '#ff5f5f');
+      assert.equal(cm.colors.ansi[204].css, '#ff5f87');
+      assert.equal(cm.colors.ansi[205].css, '#ff5faf');
+      assert.equal(cm.colors.ansi[206].css, '#ff5fd7');
+      assert.equal(cm.colors.ansi[207].css, '#ff5fff');
+      assert.equal(cm.colors.ansi[208].css, '#ff8700');
+      assert.equal(cm.colors.ansi[209].css, '#ff875f');
+      assert.equal(cm.colors.ansi[210].css, '#ff8787');
+      assert.equal(cm.colors.ansi[211].css, '#ff87af');
+      assert.equal(cm.colors.ansi[212].css, '#ff87d7');
+      assert.equal(cm.colors.ansi[213].css, '#ff87ff');
+      assert.equal(cm.colors.ansi[214].css, '#ffaf00');
+      assert.equal(cm.colors.ansi[215].css, '#ffaf5f');
+      assert.equal(cm.colors.ansi[216].css, '#ffaf87');
+      assert.equal(cm.colors.ansi[217].css, '#ffafaf');
+      assert.equal(cm.colors.ansi[218].css, '#ffafd7');
+      assert.equal(cm.colors.ansi[219].css, '#ffafff');
+      assert.equal(cm.colors.ansi[220].css, '#ffd700');
+      assert.equal(cm.colors.ansi[221].css, '#ffd75f');
+      assert.equal(cm.colors.ansi[222].css, '#ffd787');
+      assert.equal(cm.colors.ansi[223].css, '#ffd7af');
+      assert.equal(cm.colors.ansi[224].css, '#ffd7d7');
+      assert.equal(cm.colors.ansi[225].css, '#ffd7ff');
+      assert.equal(cm.colors.ansi[226].css, '#ffff00');
+      assert.equal(cm.colors.ansi[227].css, '#ffff5f');
+      assert.equal(cm.colors.ansi[228].css, '#ffff87');
+      assert.equal(cm.colors.ansi[229].css, '#ffffaf');
+      assert.equal(cm.colors.ansi[230].css, '#ffffd7');
+      assert.equal(cm.colors.ansi[231].css, '#ffffff');
+      assert.equal(cm.colors.ansi[232].css, '#080808');
+      assert.equal(cm.colors.ansi[233].css, '#121212');
+      assert.equal(cm.colors.ansi[234].css, '#1c1c1c');
+      assert.equal(cm.colors.ansi[235].css, '#262626');
+      assert.equal(cm.colors.ansi[236].css, '#303030');
+      assert.equal(cm.colors.ansi[237].css, '#3a3a3a');
+      assert.equal(cm.colors.ansi[238].css, '#444444');
+      assert.equal(cm.colors.ansi[239].css, '#4e4e4e');
+      assert.equal(cm.colors.ansi[240].css, '#585858');
+      assert.equal(cm.colors.ansi[241].css, '#626262');
+      assert.equal(cm.colors.ansi[242].css, '#6c6c6c');
+      assert.equal(cm.colors.ansi[243].css, '#767676');
+      assert.equal(cm.colors.ansi[244].css, '#808080');
+      assert.equal(cm.colors.ansi[245].css, '#8a8a8a');
+      assert.equal(cm.colors.ansi[246].css, '#949494');
+      assert.equal(cm.colors.ansi[247].css, '#9e9e9e');
+      assert.equal(cm.colors.ansi[248].css, '#a8a8a8');
+      assert.equal(cm.colors.ansi[249].css, '#b2b2b2');
+      assert.equal(cm.colors.ansi[250].css, '#bcbcbc');
+      assert.equal(cm.colors.ansi[251].css, '#c6c6c6');
+      assert.equal(cm.colors.ansi[252].css, '#d0d0d0');
+      assert.equal(cm.colors.ansi[253].css, '#dadada');
+      assert.equal(cm.colors.ansi[254].css, '#e4e4e4');
+      assert.equal(cm.colors.ansi[255].css, '#eeeeee');
+    });
+  });
+
+  describe('setTheme', () => {
+    it('should not throw when not setting all colors', () => {
+      assert.doesNotThrow(() => {
+        cm.setTheme({});
+      });
+    });
+
+    it('should set a partial set of colors, using the default if not present', () => {
+      assert.equal(cm.colors.background.css, '#000000');
+      assert.equal(cm.colors.foreground.css, '#ffffff');
+      cm.setTheme({
+        background: '#FF0000',
+        foreground: '#00FF00'
+      });
+      assert.equal(cm.colors.background.css, '#FF0000');
+      assert.equal(cm.colors.foreground.css, '#00FF00');
+      cm.setTheme({
+        background: '#0000FF'
+      });
+      assert.equal(cm.colors.background.css, '#0000FF');
+      // FG reverts back to default
+      assert.equal(cm.colors.foreground.css, '#ffffff');
+    });
+  });
+});

src/ui/ColorManager.ts

@@ -0,0 +1,186 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { IColorManager, IColor, IColorSet } from './Types';
+import { ITheme } from 'xterm';
+
+const DEFAULT_FOREGROUND = fromHex('#ffffff');
+const DEFAULT_BACKGROUND = fromHex('#000000');
+const DEFAULT_CURSOR = fromHex('#ffffff');
+const DEFAULT_CURSOR_ACCENT = fromHex('#000000');
+const DEFAULT_SELECTION = {
+  css: 'rgba(255, 255, 255, 0.3)',
+  rgba: 0xFFFFFF77
+};
+
+// An IIFE to generate DEFAULT_ANSI_COLORS. Do not mutate DEFAULT_ANSI_COLORS, instead make a copy
+// and mutate that.
+export const DEFAULT_ANSI_COLORS = (() => {
+  const colors = [
+    // dark:
+    fromHex('#2e3436'),
+    fromHex('#cc0000'),
+    fromHex('#4e9a06'),
+    fromHex('#c4a000'),
+    fromHex('#3465a4'),
+    fromHex('#75507b'),
+    fromHex('#06989a'),
+    fromHex('#d3d7cf'),
+    // bright:
+    fromHex('#555753'),
+    fromHex('#ef2929'),
+    fromHex('#8ae234'),
+    fromHex('#fce94f'),
+    fromHex('#729fcf'),
+    fromHex('#ad7fa8'),
+    fromHex('#34e2e2'),
+    fromHex('#eeeeec')
+  ];
+
+  // Fill in the remaining 240 ANSI colors.
+  // Generate colors (16-231)
+  const v = [0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff];
+  for (let i = 0; i < 216; i++) {
+    const r = v[(i / 36) % 6 | 0];
+    const g = v[(i / 6) % 6 | 0];
+    const b = v[i % 6];
+    colors.push({
+      css: `#${toPaddedHex(r)}${toPaddedHex(g)}${toPaddedHex(b)}`,
+      // Use >>> 0 to force a conversion to an unsigned int
+      rgba: ((r << 24) | (g << 16) | (b << 8) | 0xFF) >>> 0
+    });
+  }
+
+  // Generate greys (232-255)
+  for (let i = 0; i < 24; i++) {
+    const c = 8 + i * 10;
+    const ch = toPaddedHex(c);
+    colors.push({
+      css: `#${ch}${ch}${ch}`,
+      rgba: ((c << 24) | (c << 16) | (c << 8) | 0xFF) >>> 0
+    });
+  }
+
+  return colors;
+})();
+
+function fromHex(css: string): IColor {
+  return {
+    css,
+    rgba: parseInt(css.slice(1), 16) << 8 | 0xFF
+  };
+}
+
+function toPaddedHex(c: number): string {
+  const s = c.toString(16);
+  return s.length < 2 ? '0' + s : s;
+}
+
+/**
+ * Manages the source of truth for a terminal's colors.
+ */
+export class ColorManager implements IColorManager {
+  public colors: IColorSet;
+  private _ctx: CanvasRenderingContext2D;
+  private _litmusColor: CanvasGradient;
+
+  constructor(document: Document, public allowTransparency: boolean) {
+    const canvas = document.createElement('canvas');
+    canvas.width = 1;
+    canvas.height = 1;
+    this._ctx = canvas.getContext('2d');
+    this._ctx.globalCompositeOperation = 'copy';
+    this._litmusColor = this._ctx.createLinearGradient(0, 0, 1, 1);
+    this.colors = {
+      foreground: DEFAULT_FOREGROUND,
+      background: DEFAULT_BACKGROUND,
+      cursor: DEFAULT_CURSOR,
+      cursorAccent: DEFAULT_CURSOR_ACCENT,
+      selection: DEFAULT_SELECTION,
+      ansi: DEFAULT_ANSI_COLORS.slice()
+    };
+  }
+
+  /**
+   * Sets the terminal's theme.
+   * @param theme The  theme to use. If a partial theme is provided then default
+   * colors will be used where colors are not defined.
+   */
+  public setTheme(theme: ITheme): void {
+    this.colors.foreground = this._parseColor(theme.foreground, DEFAULT_FOREGROUND);
+    this.colors.background = this._parseColor(theme.background, DEFAULT_BACKGROUND);
+    this.colors.cursor = this._parseColor(theme.cursor, DEFAULT_CURSOR, true);
+    this.colors.cursorAccent = this._parseColor(theme.cursorAccent, DEFAULT_CURSOR_ACCENT, true);
+    this.colors.selection = this._parseColor(theme.selection, DEFAULT_SELECTION, true);
+    this.colors.ansi[0] = this._parseColor(theme.black, DEFAULT_ANSI_COLORS[0]);
+    this.colors.ansi[1] = this._parseColor(theme.red, DEFAULT_ANSI_COLORS[1]);
+    this.colors.ansi[2] = this._parseColor(theme.green, DEFAULT_ANSI_COLORS[2]);
+    this.colors.ansi[3] = this._parseColor(theme.yellow, DEFAULT_ANSI_COLORS[3]);
+    this.colors.ansi[4] = this._parseColor(theme.blue, DEFAULT_ANSI_COLORS[4]);
+    this.colors.ansi[5] = this._parseColor(theme.magenta, DEFAULT_ANSI_COLORS[5]);
+    this.colors.ansi[6] = this._parseColor(theme.cyan, DEFAULT_ANSI_COLORS[6]);
+    this.colors.ansi[7] = this._parseColor(theme.white, DEFAULT_ANSI_COLORS[7]);
+    this.colors.ansi[8] = this._parseColor(theme.brightBlack, DEFAULT_ANSI_COLORS[8]);
+    this.colors.ansi[9] = this._parseColor(theme.brightRed, DEFAULT_ANSI_COLORS[9]);
+    this.colors.ansi[10] = this._parseColor(theme.brightGreen, DEFAULT_ANSI_COLORS[10]);
+    this.colors.ansi[11] = this._parseColor(theme.brightYellow, DEFAULT_ANSI_COLORS[11]);
+    this.colors.ansi[12] = this._parseColor(theme.brightBlue, DEFAULT_ANSI_COLORS[12]);
+    this.colors.ansi[13] = this._parseColor(theme.brightMagenta, DEFAULT_ANSI_COLORS[13]);
+    this.colors.ansi[14] = this._parseColor(theme.brightCyan, DEFAULT_ANSI_COLORS[14]);
+    this.colors.ansi[15] = this._parseColor(theme.brightWhite, DEFAULT_ANSI_COLORS[15]);
+  }
+
+  private _parseColor(
+    css: string,
+    fallback: IColor,
+    allowTransparency: boolean = this.allowTransparency
+  ): IColor {
+    if (!css) {
+      return fallback;
+    }
+
+    // If parsing the value results in failure, then it must be ignored, and the attribute must
+    // retain its previous value.
+    // -- https://html.spec.whatwg.org/multipage/canvas.html#fill-and-stroke-styles
+    this._ctx.fillStyle = this._litmusColor;
+    this._ctx.fillStyle = css;
+    if (typeof this._ctx.fillStyle !== 'string') {
+      console.warn(`Color: ${css} is invalid using fallback ${fallback.css}`);
+      return fallback;
+    }
+
+    this._ctx.fillRect(0, 0, 1, 1);
+    const data = this._ctx.getImageData(0, 0, 1, 1).data;
+
+    if (!allowTransparency && data[3] !== 0xFF) {
+      // Ideally we'd just ignore the alpha channel, but...
+      //
+      // Browsers may not give back exactly the same RGB values we put in, because most/all
+      // convert the color to a pre-multiplied representation. getImageData converts that back to
+      // a un-premultipled representation, but the precision loss may make the RGB channels unuable
+      // on their own.
+      //
+      // E.g. In Chrome #12345610 turns into #10305010, and in the extreme case, 0xFFFFFF00 turns
+      // into 0x00000000.
+      //
+      // "Note: Due to the lossy nature of converting to and from premultiplied alpha color values,
+      // pixels that have just been set using putImageData() might be returned to an equivalent
+      // getImageData() as different values."
+      // -- https://html.spec.whatwg.org/multipage/canvas.html#pixel-manipulation
+      //
+      // So let's just use the fallback color in this case instead.
+      console.warn(
+        `Color: ${css} is using transparency, but allowTransparency is false. ` +
+        `Using fallback ${fallback.css}.`
+      );
+      return fallback;
+    }
+
+    return {
+      css,
+      rgba: (data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]) >>> 0
+    };
+  }
+}

src/ui/Types.ts

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+export interface IColorManager {
+  colors: IColorSet;
+}
+
+export interface IColor {
+  css: string;
+  rgba: number; // 32-bit int with rgba in each byte
+}
+
+export interface IColorSet {
+  foreground: IColor;
+  background: IColor;
+  cursor: IColor;
+  cursorAccent: IColor;
+  selection: IColor;
+  ansi: IColor[];
+}