+++ /dev/null
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { IColorManager, IColor, IColorSet } from 'browser/Types';
-import { ITheme } from 'common/services/Services';
-
-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;
- const ctx = canvas.getContext('2d');
- if (!ctx) {
- throw new Error('Could not get rendering context');
- }
- this._ctx = ctx;
- 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 | undefined,
- fallback: IColor,
- allowTransparency: boolean = this.allowTransparency
- ): IColor {
- if (css === undefined) {
- 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
- };
- }
-}
projects / VSoRC / .git / blobdiff