Move color to common, work with IColor
IColor is needed for the minimum contrast ratio function currently.
This commit is contained in:
Daniel Imms
@@ -0,0 +1,331 @@
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/**
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* Copyright (c) 2017 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { assert } from 'chai';
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import { channels, color, css, rgb, rgba, toPaddedHex, contrastRatio } from 'common/Color';
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describe('Color', () => {
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describe('channels', () => {
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describe('toCss', () => {
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it('should convert an rgb array to css hex string', () => {
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assert.equal(channels.toCss(0x00, 0x00, 0x00), '#000000');
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assert.equal(channels.toCss(0x10, 0x10, 0x10), '#101010');
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assert.equal(channels.toCss(0x20, 0x20, 0x20), '#202020');
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assert.equal(channels.toCss(0x30, 0x30, 0x30), '#303030');
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assert.equal(channels.toCss(0x40, 0x40, 0x40), '#404040');
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assert.equal(channels.toCss(0x50, 0x50, 0x50), '#505050');
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assert.equal(channels.toCss(0x60, 0x60, 0x60), '#606060');
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assert.equal(channels.toCss(0x70, 0x70, 0x70), '#707070');
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assert.equal(channels.toCss(0x80, 0x80, 0x80), '#808080');
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assert.equal(channels.toCss(0x90, 0x90, 0x90), '#909090');
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assert.equal(channels.toCss(0xa0, 0xa0, 0xa0), '#a0a0a0');
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assert.equal(channels.toCss(0xb0, 0xb0, 0xb0), '#b0b0b0');
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assert.equal(channels.toCss(0xc0, 0xc0, 0xc0), '#c0c0c0');
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assert.equal(channels.toCss(0xd0, 0xd0, 0xd0), '#d0d0d0');
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assert.equal(channels.toCss(0xe0, 0xe0, 0xe0), '#e0e0e0');
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assert.equal(channels.toCss(0xf0, 0xf0, 0xf0), '#f0f0f0');
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assert.equal(channels.toCss(0xff, 0xff, 0xff), '#ffffff');
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});
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});
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describe('toRgba', () => {
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it('should convert an rgb array to an rgba number', () => {
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assert.equal(channels.toRgba(0x00, 0x00, 0x00), 0x000000FF);
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assert.equal(channels.toRgba(0x10, 0x10, 0x10), 0x101010FF);
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assert.equal(channels.toRgba(0x20, 0x20, 0x20), 0x202020FF);
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assert.equal(channels.toRgba(0x30, 0x30, 0x30), 0x303030FF);
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assert.equal(channels.toRgba(0x40, 0x40, 0x40), 0x404040FF);
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assert.equal(channels.toRgba(0x50, 0x50, 0x50), 0x505050FF);
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assert.equal(channels.toRgba(0x60, 0x60, 0x60), 0x606060FF);
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assert.equal(channels.toRgba(0x70, 0x70, 0x70), 0x707070FF);
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assert.equal(channels.toRgba(0x80, 0x80, 0x80), 0x808080FF);
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assert.equal(channels.toRgba(0x90, 0x90, 0x90), 0x909090FF);
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assert.equal(channels.toRgba(0xa0, 0xa0, 0xa0), 0xa0a0a0FF);
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assert.equal(channels.toRgba(0xb0, 0xb0, 0xb0), 0xb0b0b0FF);
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assert.equal(channels.toRgba(0xc0, 0xc0, 0xc0), 0xc0c0c0FF);
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assert.equal(channels.toRgba(0xd0, 0xd0, 0xd0), 0xd0d0d0FF);
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assert.equal(channels.toRgba(0xe0, 0xe0, 0xe0), 0xe0e0e0FF);
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assert.equal(channels.toRgba(0xf0, 0xf0, 0xf0), 0xf0f0f0FF);
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assert.equal(channels.toRgba(0xff, 0xff, 0xff), 0xffffffFF);
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});
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it('should convert an rgba array to an rgba number', () => {
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assert.equal(channels.toRgba(0x00, 0x00, 0x00, 0x00), 0x00000000);
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assert.equal(channels.toRgba(0x10, 0x10, 0x10, 0x10), 0x10101010);
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assert.equal(channels.toRgba(0x20, 0x20, 0x20, 0x20), 0x20202020);
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assert.equal(channels.toRgba(0x30, 0x30, 0x30, 0x30), 0x30303030);
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assert.equal(channels.toRgba(0x40, 0x40, 0x40, 0x40), 0x40404040);
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assert.equal(channels.toRgba(0x50, 0x50, 0x50, 0x50), 0x50505050);
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assert.equal(channels.toRgba(0x60, 0x60, 0x60, 0x60), 0x60606060);
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assert.equal(channels.toRgba(0x70, 0x70, 0x70, 0x70), 0x70707070);
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assert.equal(channels.toRgba(0x80, 0x80, 0x80, 0x80), 0x80808080);
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assert.equal(channels.toRgba(0x90, 0x90, 0x90, 0x90), 0x90909090);
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assert.equal(channels.toRgba(0xa0, 0xa0, 0xa0, 0xa0), 0xa0a0a0a0);
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assert.equal(channels.toRgba(0xb0, 0xb0, 0xb0, 0xb0), 0xb0b0b0b0);
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assert.equal(channels.toRgba(0xc0, 0xc0, 0xc0, 0xc0), 0xc0c0c0c0);
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assert.equal(channels.toRgba(0xd0, 0xd0, 0xd0, 0xd0), 0xd0d0d0d0);
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assert.equal(channels.toRgba(0xe0, 0xe0, 0xe0, 0xe0), 0xe0e0e0e0);
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assert.equal(channels.toRgba(0xf0, 0xf0, 0xf0, 0xf0), 0xf0f0f0f0);
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assert.equal(channels.toRgba(0xff, 0xff, 0xff, 0xff), 0xffffffff);
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});
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});
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});
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describe('color', () => {
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describe('blend', () => {
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it('should blend colors based on the alpha channel', () => {
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF00', rgba: 0xFFFFFF00 }), { css: '#000000', rgba: 0x000000FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF10', rgba: 0xFFFFFF10 }), { css: '#101010', rgba: 0x101010FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF20', rgba: 0xFFFFFF20 }), { css: '#202020', rgba: 0x202020FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF30', rgba: 0xFFFFFF30 }), { css: '#303030', rgba: 0x303030FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF40', rgba: 0xFFFFFF40 }), { css: '#404040', rgba: 0x404040FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF50', rgba: 0xFFFFFF50 }), { css: '#505050', rgba: 0x505050FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF60', rgba: 0xFFFFFF60 }), { css: '#606060', rgba: 0x606060FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF70', rgba: 0xFFFFFF70 }), { css: '#707070', rgba: 0x707070FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF80', rgba: 0xFFFFFF80 }), { css: '#808080', rgba: 0x808080FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFF90', rgba: 0xFFFFFF90 }), { css: '#909090', rgba: 0x909090FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFA0', rgba: 0xFFFFFFA0 }), { css: '#a0a0a0', rgba: 0xA0A0A0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFB0', rgba: 0xFFFFFFB0 }), { css: '#b0b0b0', rgba: 0xB0B0B0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFC0', rgba: 0xFFFFFFC0 }), { css: '#c0c0c0', rgba: 0xC0C0C0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFD0', rgba: 0xFFFFFFD0 }), { css: '#d0d0d0', rgba: 0xD0D0D0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFE0', rgba: 0xFFFFFFE0 }), { css: '#e0e0e0', rgba: 0xE0E0E0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFF0', rgba: 0xFFFFFFF0 }), { css: '#f0f0f0', rgba: 0xF0F0F0FF });
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assert.deepEqual(color.blend({ css: '#000000', rgba: 0x000000FF }, { css: '#FFFFFFFF', rgba: 0xFFFFFFFF }), { css: '#FFFFFFFF', rgba: 0xFFFFFFFF });
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});
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});
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describe('opaque', () => {
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it('should make the color opaque', () => {
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assert.deepEqual(color.opaque({ css: '#00000000', rgba: 0x00000000 }), { css: '#000000', rgba: 0x000000FF });
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assert.deepEqual(color.opaque({ css: '#10101010', rgba: 0x10101010 }), { css: '#101010', rgba: 0x101010FF });
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assert.deepEqual(color.opaque({ css: '#20202020', rgba: 0x20202020 }), { css: '#202020', rgba: 0x202020FF });
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assert.deepEqual(color.opaque({ css: '#30303030', rgba: 0x30303030 }), { css: '#303030', rgba: 0x303030FF });
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assert.deepEqual(color.opaque({ css: '#40404040', rgba: 0x40404040 }), { css: '#404040', rgba: 0x404040FF });
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assert.deepEqual(color.opaque({ css: '#50505050', rgba: 0x50505050 }), { css: '#505050', rgba: 0x505050FF });
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assert.deepEqual(color.opaque({ css: '#60606060', rgba: 0x60606060 }), { css: '#606060', rgba: 0x606060FF });
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assert.deepEqual(color.opaque({ css: '#70707070', rgba: 0x70707070 }), { css: '#707070', rgba: 0x707070FF });
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assert.deepEqual(color.opaque({ css: '#80808080', rgba: 0x80808080 }), { css: '#808080', rgba: 0x808080FF });
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assert.deepEqual(color.opaque({ css: '#90909090', rgba: 0x90909090 }), { css: '#909090', rgba: 0x909090FF });
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assert.deepEqual(color.opaque({ css: '#a0a0a0a0', rgba: 0xa0a0a0a0 }), { css: '#a0a0a0', rgba: 0xa0a0a0FF });
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assert.deepEqual(color.opaque({ css: '#b0b0b0b0', rgba: 0xb0b0b0b0 }), { css: '#b0b0b0', rgba: 0xb0b0b0FF });
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assert.deepEqual(color.opaque({ css: '#c0c0c0c0', rgba: 0xc0c0c0c0 }), { css: '#c0c0c0', rgba: 0xc0c0c0FF });
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assert.deepEqual(color.opaque({ css: '#d0d0d0d0', rgba: 0xd0d0d0d0 }), { css: '#d0d0d0', rgba: 0xd0d0d0FF });
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assert.deepEqual(color.opaque({ css: '#e0e0e0e0', rgba: 0xe0e0e0e0 }), { css: '#e0e0e0', rgba: 0xe0e0e0FF });
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assert.deepEqual(color.opaque({ css: '#f0f0f0f0', rgba: 0xf0f0f0f0 }), { css: '#f0f0f0', rgba: 0xf0f0f0FF });
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assert.deepEqual(color.opaque({ css: '#ffffffff', rgba: 0xffffffff }), { css: '#ffffff', rgba: 0xffffffFF });
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});
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});
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describe('isOpaque', () => {
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it('should return true for opaque colors', () => {
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assert.ok(color.isOpaque(css.toColor('#000000')));
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assert.ok(color.isOpaque(css.toColor('#000000ff')));
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assert.ok(color.isOpaque(css.toColor('#808080')));
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assert.ok(color.isOpaque(css.toColor('#808080ff')));
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assert.ok(color.isOpaque(css.toColor('#ffffff')));
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assert.ok(color.isOpaque(css.toColor('#ffffffff')));
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});
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it('should return false for transparent colors', () => {
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assert.ok(!color.isOpaque(css.toColor('#00000000')));
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assert.ok(!color.isOpaque(css.toColor('#00000080')));
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assert.ok(!color.isOpaque(css.toColor('#000000fe')));
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assert.ok(!color.isOpaque(css.toColor('#80808000')));
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assert.ok(!color.isOpaque(css.toColor('#80808080')));
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assert.ok(!color.isOpaque(css.toColor('#808080fe')));
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assert.ok(!color.isOpaque(css.toColor('#ffffff00')));
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assert.ok(!color.isOpaque(css.toColor('#ffffff80')));
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assert.ok(!color.isOpaque(css.toColor('#fffffffe')));
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});
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});
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describe('opacity', () => {
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it('should make the color transparent', () => {
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assert.deepEqual(color.opacity(css.toColor('#000000'), 0), { css: '#00000000', rgba: 0x00000000 });
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assert.deepEqual(color.opacity(css.toColor('#000000'), 0.25), { css: '#00000040', rgba: 0x00000040 });
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assert.deepEqual(color.opacity(css.toColor('#000000'), 0.5), { css: '#00000080', rgba: 0x00000080 });
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assert.deepEqual(color.opacity(css.toColor('#000000'), 0.75), { css: '#000000bf', rgba: 0x000000bf });
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assert.deepEqual(color.opacity(css.toColor('#000000'), 1), { css: '#000000ff', rgba: 0x000000ff });
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});
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});
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});
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describe('css', () => {
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describe('toColor', () => {
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it('should convert the #rrggbb format to an IColor', () => {
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assert.deepEqual(css.toColor('#000000'), { css: '#000000', rgba: 0x000000FF });
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assert.deepEqual(css.toColor('#101010'), { css: '#101010', rgba: 0x101010FF });
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assert.deepEqual(css.toColor('#202020'), { css: '#202020', rgba: 0x202020FF });
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assert.deepEqual(css.toColor('#303030'), { css: '#303030', rgba: 0x303030FF });
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assert.deepEqual(css.toColor('#404040'), { css: '#404040', rgba: 0x404040FF });
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assert.deepEqual(css.toColor('#505050'), { css: '#505050', rgba: 0x505050FF });
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assert.deepEqual(css.toColor('#606060'), { css: '#606060', rgba: 0x606060FF });
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assert.deepEqual(css.toColor('#707070'), { css: '#707070', rgba: 0x707070FF });
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assert.deepEqual(css.toColor('#808080'), { css: '#808080', rgba: 0x808080FF });
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assert.deepEqual(css.toColor('#909090'), { css: '#909090', rgba: 0x909090FF });
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assert.deepEqual(css.toColor('#a0a0a0'), { css: '#a0a0a0', rgba: 0xa0a0a0FF });
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assert.deepEqual(css.toColor('#b0b0b0'), { css: '#b0b0b0', rgba: 0xb0b0b0FF });
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assert.deepEqual(css.toColor('#c0c0c0'), { css: '#c0c0c0', rgba: 0xc0c0c0FF });
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assert.deepEqual(css.toColor('#d0d0d0'), { css: '#d0d0d0', rgba: 0xd0d0d0FF });
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assert.deepEqual(css.toColor('#e0e0e0'), { css: '#e0e0e0', rgba: 0xe0e0e0FF });
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assert.deepEqual(css.toColor('#f0f0f0'), { css: '#f0f0f0', rgba: 0xf0f0f0FF });
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assert.deepEqual(css.toColor('#ffffff'), { css: '#ffffff', rgba: 0xffffffFF });
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});
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it('should convert the #rrggbbaa format to an IColor', () => {
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assert.deepEqual(css.toColor('#00000000'), { css: '#00000000', rgba: 0x00000000 });
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assert.deepEqual(css.toColor('#10101010'), { css: '#10101010', rgba: 0x10101010 });
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assert.deepEqual(css.toColor('#20202020'), { css: '#20202020', rgba: 0x20202020 });
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assert.deepEqual(css.toColor('#30303030'), { css: '#30303030', rgba: 0x30303030 });
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assert.deepEqual(css.toColor('#40404040'), { css: '#40404040', rgba: 0x40404040 });
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assert.deepEqual(css.toColor('#50505050'), { css: '#50505050', rgba: 0x50505050 });
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assert.deepEqual(css.toColor('#60606060'), { css: '#60606060', rgba: 0x60606060 });
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assert.deepEqual(css.toColor('#70707070'), { css: '#70707070', rgba: 0x70707070 });
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assert.deepEqual(css.toColor('#80808080'), { css: '#80808080', rgba: 0x80808080 });
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assert.deepEqual(css.toColor('#90909090'), { css: '#90909090', rgba: 0x90909090 });
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assert.deepEqual(css.toColor('#a0a0a0a0'), { css: '#a0a0a0a0', rgba: 0xa0a0a0a0 });
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assert.deepEqual(css.toColor('#b0b0b0b0'), { css: '#b0b0b0b0', rgba: 0xb0b0b0b0 });
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assert.deepEqual(css.toColor('#c0c0c0c0'), { css: '#c0c0c0c0', rgba: 0xc0c0c0c0 });
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assert.deepEqual(css.toColor('#d0d0d0d0'), { css: '#d0d0d0d0', rgba: 0xd0d0d0d0 });
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assert.deepEqual(css.toColor('#e0e0e0e0'), { css: '#e0e0e0e0', rgba: 0xe0e0e0e0 });
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assert.deepEqual(css.toColor('#f0f0f0f0'), { css: '#f0f0f0f0', rgba: 0xf0f0f0f0 });
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assert.deepEqual(css.toColor('#ffffffff'), { css: '#ffffffff', rgba: 0xffffffff });
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});
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});
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});
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describe('rgb', () => {
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describe('relativeLuminance', () => {
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it('should calculate the relative luminance of the color', () => {
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assert.equal(rgb.relativeLuminance(0x000000), 0);
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assert.equal(rgb.relativeLuminance(0x101010).toFixed(4), '0.0052');
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assert.equal(rgb.relativeLuminance(0x202020).toFixed(4), '0.0144');
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assert.equal(rgb.relativeLuminance(0x303030).toFixed(4), '0.0296');
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assert.equal(rgb.relativeLuminance(0x404040).toFixed(4), '0.0513');
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assert.equal(rgb.relativeLuminance(0x505050).toFixed(4), '0.0802');
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assert.equal(rgb.relativeLuminance(0x606060).toFixed(4), '0.1170');
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assert.equal(rgb.relativeLuminance(0x707070).toFixed(4), '0.1620');
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assert.equal(rgb.relativeLuminance(0x808080).toFixed(4), '0.2159');
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assert.equal(rgb.relativeLuminance(0x909090).toFixed(4), '0.2789');
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assert.equal(rgb.relativeLuminance(0xA0A0A0).toFixed(4), '0.3515');
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assert.equal(rgb.relativeLuminance(0xB0B0B0).toFixed(4), '0.4342');
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assert.equal(rgb.relativeLuminance(0xC0C0C0).toFixed(4), '0.5271');
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assert.equal(rgb.relativeLuminance(0xD0D0D0).toFixed(4), '0.6308');
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assert.equal(rgb.relativeLuminance(0xE0E0E0).toFixed(4), '0.7454');
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assert.equal(rgb.relativeLuminance(0xF0F0F0).toFixed(4), '0.8714');
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assert.equal(rgb.relativeLuminance(0xFFFFFF), 1);
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});
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});
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});
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describe('rgba', () => {
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describe('ensureContrastRatio', () => {
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it('should return undefined if the color already meets the contrast ratio (black bg)', () => {
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 1), undefined);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 2), undefined);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 3), undefined);
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});
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it('should return a color that meets the contrast ratio (black bg)', () => {
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 4), 0x707070ff);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 5), 0x7f7f7fff);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 6), 0x8c8c8cff);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 7), 0x989898ff);
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assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 8), 0xa3a3a3ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 9), 0xadadadff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 10), 0xb6b6b6ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 11), 0xbebebeff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 12), 0xc5c5c5ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 13), 0xd1d1d1ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 14), 0xd6d6d6ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 15), 0xdbdbdbff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 16), 0xe3e3e3ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 17), 0xe9e9e9ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 18), 0xeeeeeeff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 19), 0xf4f4f4ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 20), 0xfafafaff);
|
||||
assert.equal(rgba.ensureContrastRatio(0x000000ff, 0x606060ff, 21), 0xffffffff);
|
||||
});
|
||||
it('should return undefined if the color already meets the contrast ratio (white bg)', () => {
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 1), undefined);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 2), undefined);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 3), undefined);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 4), undefined);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 5), undefined);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 6), undefined);
|
||||
});
|
||||
it('should return a color that meets the contrast ratio (white bg)', () => {
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 7), 0x565656ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 8), 0x4d4d4dff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 9), 0x454545ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 10), 0x3e3e3eff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 11), 0x373737ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 12), 0x313131ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 13), 0x313131ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 14), 0x272727ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 15), 0x232323ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 16), 0x1f1f1fff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 17), 0x1b1b1bff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 18), 0x151515ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 19), 0x101010ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 20), 0x080808ff);
|
||||
assert.equal(rgba.ensureContrastRatio(0xffffffff, 0x606060ff, 21), 0x000000ff);
|
||||
});
|
||||
});
|
||||
|
||||
describe('toChannels', () => {
|
||||
it('should convert an rgba number to an rgba array', () => {
|
||||
assert.deepEqual(rgba.toChannels(0x00000000), [0x00, 0x00, 0x00, 0x00]);
|
||||
assert.deepEqual(rgba.toChannels(0x10101010), [0x10, 0x10, 0x10, 0x10]);
|
||||
assert.deepEqual(rgba.toChannels(0x20202020), [0x20, 0x20, 0x20, 0x20]);
|
||||
assert.deepEqual(rgba.toChannels(0x30303030), [0x30, 0x30, 0x30, 0x30]);
|
||||
assert.deepEqual(rgba.toChannels(0x40404040), [0x40, 0x40, 0x40, 0x40]);
|
||||
assert.deepEqual(rgba.toChannels(0x50505050), [0x50, 0x50, 0x50, 0x50]);
|
||||
assert.deepEqual(rgba.toChannels(0x60606060), [0x60, 0x60, 0x60, 0x60]);
|
||||
assert.deepEqual(rgba.toChannels(0x70707070), [0x70, 0x70, 0x70, 0x70]);
|
||||
assert.deepEqual(rgba.toChannels(0x80808080), [0x80, 0x80, 0x80, 0x80]);
|
||||
assert.deepEqual(rgba.toChannels(0x90909090), [0x90, 0x90, 0x90, 0x90]);
|
||||
assert.deepEqual(rgba.toChannels(0xa0a0a0a0), [0xa0, 0xa0, 0xa0, 0xa0]);
|
||||
assert.deepEqual(rgba.toChannels(0xb0b0b0b0), [0xb0, 0xb0, 0xb0, 0xb0]);
|
||||
assert.deepEqual(rgba.toChannels(0xc0c0c0c0), [0xc0, 0xc0, 0xc0, 0xc0]);
|
||||
assert.deepEqual(rgba.toChannels(0xd0d0d0d0), [0xd0, 0xd0, 0xd0, 0xd0]);
|
||||
assert.deepEqual(rgba.toChannels(0xe0e0e0e0), [0xe0, 0xe0, 0xe0, 0xe0]);
|
||||
assert.deepEqual(rgba.toChannels(0xf0f0f0f0), [0xf0, 0xf0, 0xf0, 0xf0]);
|
||||
assert.deepEqual(rgba.toChannels(0xffffffff), [0xff, 0xff, 0xff, 0xff]);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('toPaddedHex', () => {
|
||||
it('should convert numbers to 2-digit hex values', () => {
|
||||
assert.equal(toPaddedHex(0x00), '00');
|
||||
assert.equal(toPaddedHex(0x10), '10');
|
||||
assert.equal(toPaddedHex(0x20), '20');
|
||||
assert.equal(toPaddedHex(0x30), '30');
|
||||
assert.equal(toPaddedHex(0x40), '40');
|
||||
assert.equal(toPaddedHex(0x50), '50');
|
||||
assert.equal(toPaddedHex(0x60), '60');
|
||||
assert.equal(toPaddedHex(0x70), '70');
|
||||
assert.equal(toPaddedHex(0x80), '80');
|
||||
assert.equal(toPaddedHex(0x90), '90');
|
||||
assert.equal(toPaddedHex(0xa0), 'a0');
|
||||
assert.equal(toPaddedHex(0xb0), 'b0');
|
||||
assert.equal(toPaddedHex(0xc0), 'c0');
|
||||
assert.equal(toPaddedHex(0xd0), 'd0');
|
||||
assert.equal(toPaddedHex(0xe0), 'e0');
|
||||
assert.equal(toPaddedHex(0xf0), 'f0');
|
||||
assert.equal(toPaddedHex(0xff), 'ff');
|
||||
});
|
||||
});
|
||||
|
||||
describe('contrastRatio', () => {
|
||||
it('should calculate the relative luminance of the color', () => {
|
||||
assert.equal(contrastRatio(0, 0), 1);
|
||||
assert.equal(contrastRatio(0, 0.5), 11);
|
||||
assert.equal(contrastRatio(0, 1), 21);
|
||||
});
|
||||
it('should work regardless of the parameter order', () => {
|
||||
assert.equal(contrastRatio(0, 1), 21);
|
||||
assert.equal(contrastRatio(1, 0), 21);
|
||||
});
|
||||
});
|
||||
});
|
||||
@@ -0,0 +1,235 @@
|
||||
/**
|
||||
* Copyright (c) 2019 The xterm.js authors. All rights reserved.
|
||||
* @license MIT
|
||||
*/
|
||||
|
||||
import { IColor, IColorRGB } from 'common/Types';
|
||||
|
||||
/**
|
||||
* Helper functions where the source type is "channels" (individual color channels as numbers).
|
||||
*/
|
||||
export namespace channels {
|
||||
export function toCss(r: number, g: number, b: number, a?: number): string {
|
||||
if (a !== undefined) {
|
||||
return `#${toPaddedHex(r)}${toPaddedHex(g)}${toPaddedHex(b)}${toPaddedHex(a)}`;
|
||||
}
|
||||
return `#${toPaddedHex(r)}${toPaddedHex(g)}${toPaddedHex(b)}`;
|
||||
}
|
||||
|
||||
export function toRgba(r: number, g: number, b: number, a: number = 0xFF): number {
|
||||
// Note: The aggregated number is RGBA32 (BE), thus needs to be converted to ABGR32
|
||||
// on LE systems, before it can be used for direct 32-bit buffer writes.
|
||||
// >>> 0 forces an unsigned int
|
||||
return (r << 24 | g << 16 | b << 8 | a) >>> 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Helper functions where the source type is `IColor`.
|
||||
*/
|
||||
export namespace color {
|
||||
export function blend(bg: IColor, fg: IColor): IColor {
|
||||
const a = (fg.rgba & 0xFF) / 255;
|
||||
if (a === 1) {
|
||||
return {
|
||||
css: fg.css,
|
||||
rgba: fg.rgba
|
||||
};
|
||||
}
|
||||
const fgR = (fg.rgba >> 24) & 0xFF;
|
||||
const fgG = (fg.rgba >> 16) & 0xFF;
|
||||
const fgB = (fg.rgba >> 8) & 0xFF;
|
||||
const bgR = (bg.rgba >> 24) & 0xFF;
|
||||
const bgG = (bg.rgba >> 16) & 0xFF;
|
||||
const bgB = (bg.rgba >> 8) & 0xFF;
|
||||
const r = bgR + Math.round((fgR - bgR) * a);
|
||||
const g = bgG + Math.round((fgG - bgG) * a);
|
||||
const b = bgB + Math.round((fgB - bgB) * a);
|
||||
const css = channels.toCss(r, g, b);
|
||||
const rgba = channels.toRgba(r, g, b);
|
||||
return { css, rgba };
|
||||
}
|
||||
|
||||
export function isOpaque(color: IColor): boolean {
|
||||
return (color.rgba & 0xFF) === 0xFF;
|
||||
}
|
||||
|
||||
export function ensureContrastRatio(bg: IColor, fg: IColor, ratio: number): IColor | undefined {
|
||||
const result = rgba.ensureContrastRatio(bg.rgba, fg.rgba, ratio);
|
||||
if (!result) {
|
||||
return undefined;
|
||||
}
|
||||
return rgba.toColor(
|
||||
(result >> 24 & 0xFF),
|
||||
(result >> 16 & 0xFF),
|
||||
(result >> 8 & 0xFF)
|
||||
);
|
||||
}
|
||||
|
||||
export function opaque(color: IColor): IColor {
|
||||
const rgbaColor = (color.rgba | 0xFF) >>> 0;
|
||||
const [r, g, b] = rgba.toChannels(rgbaColor);
|
||||
return {
|
||||
css: channels.toCss(r, g, b),
|
||||
rgba: rgbaColor
|
||||
};
|
||||
}
|
||||
|
||||
export function opacity(color: IColor, opacity: number): IColor {
|
||||
const a = Math.round(opacity * 0xFF);
|
||||
const [r, g, b] = rgba.toChannels(color.rgba);
|
||||
return {
|
||||
css: channels.toCss(r, g, b, a),
|
||||
rgba: channels.toRgba(r, g, b, a)
|
||||
};
|
||||
}
|
||||
|
||||
export function toColorRGB(color: IColor): IColorRGB {
|
||||
return [(color.rgba >> 24) & 0xFF, (color.rgba >> 16) & 0xFF, (color.rgba >> 8) & 0xFF];
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Helper functions where the source type is "css" (string: '#rgb', '#rgba', '#rrggbb', '#rrggbbaa').
|
||||
*/
|
||||
export namespace css {
|
||||
export function toColor(css: string): IColor {
|
||||
switch (css.length) {
|
||||
case 7: // #rrggbb
|
||||
return {
|
||||
css,
|
||||
rgba: (parseInt(css.slice(1), 16) << 8 | 0xFF) >>> 0
|
||||
};
|
||||
case 9: // #rrggbbaa
|
||||
return {
|
||||
css,
|
||||
rgba: parseInt(css.slice(1), 16) >>> 0
|
||||
};
|
||||
}
|
||||
throw new Error('css.toColor: Unsupported css format');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Helper functions where the source type is "rgb" (number: 0xrrggbb).
|
||||
*/
|
||||
export namespace rgb {
|
||||
/**
|
||||
* Gets the relative luminance of an RGB color, this is useful in determining the contrast ratio
|
||||
* between two colors.
|
||||
* @param rgb The color to use.
|
||||
* @see https://www.w3.org/TR/WCAG20/#relativeluminancedef
|
||||
*/
|
||||
export function relativeLuminance(rgb: number): number {
|
||||
return relativeLuminance2(
|
||||
(rgb >> 16) & 0xFF,
|
||||
(rgb >> 8 ) & 0xFF,
|
||||
(rgb ) & 0xFF);
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the relative luminance of an RGB color, this is useful in determining the contrast ratio
|
||||
* between two colors.
|
||||
* @param r The red channel (0x00 to 0xFF).
|
||||
* @param g The green channel (0x00 to 0xFF).
|
||||
* @param b The blue channel (0x00 to 0xFF).
|
||||
* @see https://www.w3.org/TR/WCAG20/#relativeluminancedef
|
||||
*/
|
||||
export function relativeLuminance2(r: number, g: number, b: number): number {
|
||||
const rs = r / 255;
|
||||
const gs = g / 255;
|
||||
const bs = b / 255;
|
||||
const rr = rs <= 0.03928 ? rs / 12.92 : Math.pow((rs + 0.055) / 1.055, 2.4);
|
||||
const rg = gs <= 0.03928 ? gs / 12.92 : Math.pow((gs + 0.055) / 1.055, 2.4);
|
||||
const rb = bs <= 0.03928 ? bs / 12.92 : Math.pow((bs + 0.055) / 1.055, 2.4);
|
||||
return rr * 0.2126 + rg * 0.7152 + rb * 0.0722;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Helper functions where the source type is "rgba" (number: 0xrrggbbaa).
|
||||
*/
|
||||
export namespace rgba {
|
||||
export function ensureContrastRatio(bgRgba: number, fgRgba: number, ratio: number): number | undefined {
|
||||
const bgL = rgb.relativeLuminance(bgRgba >> 8);
|
||||
const fgL = rgb.relativeLuminance(fgRgba >> 8);
|
||||
const cr = contrastRatio(bgL, fgL);
|
||||
if (cr < ratio) {
|
||||
if (fgL < bgL) {
|
||||
return reduceLuminance(bgRgba, fgRgba, ratio);
|
||||
}
|
||||
return increaseLuminance(bgRgba, fgRgba, ratio);
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
export function reduceLuminance(bgRgba: number, fgRgba: number, ratio: number): number {
|
||||
// This is a naive but fast approach to reducing luminance as converting to
|
||||
// HSL and back is expensive
|
||||
const bgR = (bgRgba >> 24) & 0xFF;
|
||||
const bgG = (bgRgba >> 16) & 0xFF;
|
||||
const bgB = (bgRgba >> 8) & 0xFF;
|
||||
let fgR = (fgRgba >> 24) & 0xFF;
|
||||
let fgG = (fgRgba >> 16) & 0xFF;
|
||||
let fgB = (fgRgba >> 8) & 0xFF;
|
||||
let cr = contrastRatio(rgb.relativeLuminance2(fgR, fgB, fgG), rgb.relativeLuminance2(bgR, bgG, bgB));
|
||||
while (cr < ratio && (fgR > 0 || fgG > 0 || fgB > 0)) {
|
||||
// Reduce by 10% until the ratio is hit
|
||||
fgR -= Math.max(0, Math.ceil(fgR * 0.1));
|
||||
fgG -= Math.max(0, Math.ceil(fgG * 0.1));
|
||||
fgB -= Math.max(0, Math.ceil(fgB * 0.1));
|
||||
cr = contrastRatio(rgb.relativeLuminance2(fgR, fgB, fgG), rgb.relativeLuminance2(bgR, bgG, bgB));
|
||||
}
|
||||
return (fgR << 24 | fgG << 16 | fgB << 8 | 0xFF) >>> 0;
|
||||
}
|
||||
|
||||
export function increaseLuminance(bgRgba: number, fgRgba: number, ratio: number): number {
|
||||
// This is a naive but fast approach to increasing luminance as converting to
|
||||
// HSL and back is expensive
|
||||
const bgR = (bgRgba >> 24) & 0xFF;
|
||||
const bgG = (bgRgba >> 16) & 0xFF;
|
||||
const bgB = (bgRgba >> 8) & 0xFF;
|
||||
let fgR = (fgRgba >> 24) & 0xFF;
|
||||
let fgG = (fgRgba >> 16) & 0xFF;
|
||||
let fgB = (fgRgba >> 8) & 0xFF;
|
||||
let cr = contrastRatio(rgb.relativeLuminance2(fgR, fgB, fgG), rgb.relativeLuminance2(bgR, bgG, bgB));
|
||||
while (cr < ratio && (fgR < 0xFF || fgG < 0xFF || fgB < 0xFF)) {
|
||||
// Increase by 10% until the ratio is hit
|
||||
fgR = Math.min(0xFF, fgR + Math.ceil((255 - fgR) * 0.1));
|
||||
fgG = Math.min(0xFF, fgG + Math.ceil((255 - fgG) * 0.1));
|
||||
fgB = Math.min(0xFF, fgB + Math.ceil((255 - fgB) * 0.1));
|
||||
cr = contrastRatio(rgb.relativeLuminance2(fgR, fgB, fgG), rgb.relativeLuminance2(bgR, bgG, bgB));
|
||||
}
|
||||
return (fgR << 24 | fgG << 16 | fgB << 8 | 0xFF) >>> 0;
|
||||
}
|
||||
|
||||
// FIXME: Move this to channels NS?
|
||||
export function toChannels(value: number): [number, number, number, number] {
|
||||
return [(value >> 24) & 0xFF, (value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF];
|
||||
}
|
||||
|
||||
export function toColor(r: number, g: number, b: number): IColor {
|
||||
return {
|
||||
css: channels.toCss(r, g, b),
|
||||
rgba: channels.toRgba(r, g, b)
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
export function toPaddedHex(c: number): string {
|
||||
const s = c.toString(16);
|
||||
return s.length < 2 ? '0' + s : s;
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the contrast ratio between two relative luminance values.
|
||||
* @param l1 The first relative luminance.
|
||||
* @param l2 The first relative luminance.
|
||||
* @see https://www.w3.org/TR/WCAG20/#contrast-ratiodef
|
||||
*/
|
||||
export function contrastRatio(l1: number, l2: number): number {
|
||||
if (l1 < l2) {
|
||||
return (l2 + 0.05) / (l1 + 0.05);
|
||||
}
|
||||
return (l1 + 0.05) / (l2 + 0.05);
|
||||
}
|
||||
@@ -162,7 +162,7 @@ export class MockUnicodeService implements IUnicodeService {
|
||||
|
||||
export class MockDecorationService implements IDecorationService {
|
||||
public serviceBrand: any;
|
||||
public get decorations(): IterableIterator<IInternalDecoration> { return [].values(); };
|
||||
public get decorations(): IterableIterator<IInternalDecoration> { return [].values(); }
|
||||
public onDecorationRegistered = new EventEmitter<IInternalDecoration>().event;
|
||||
public onDecorationRemoved = new EventEmitter<IInternalDecoration>().event;
|
||||
public registerDecoration(decorationOptions: IDecorationOptions): IDecoration | undefined { return undefined; }
|
||||
|
||||
Vendored
+5
@@ -102,6 +102,11 @@ export interface ICharset {
|
||||
}
|
||||
|
||||
export type CharData = [number, string, number, number];
|
||||
|
||||
export interface IColor {
|
||||
css: string;
|
||||
rgba: number; // 32-bit int with rgba in each byte
|
||||
}
|
||||
export type IColorRGB = [number, number, number];
|
||||
|
||||
export interface IExtendedAttrs {
|
||||
|
||||
@@ -3,10 +3,11 @@
|
||||
* @license MIT
|
||||
*/
|
||||
|
||||
import { css } from 'common/Color';
|
||||
import { EventEmitter } from 'common/EventEmitter';
|
||||
import { Disposable } from 'common/Lifecycle';
|
||||
import { IDecorationService, IInternalDecoration } from 'common/services/Services';
|
||||
import { IColorRGB } from 'common/Types';
|
||||
import { IColor } from 'common/Types';
|
||||
import { IDecorationOptions, IDecoration, IMarker, IEvent } from 'xterm';
|
||||
|
||||
export class DecorationService extends Disposable implements IDecorationService {
|
||||
@@ -75,11 +76,11 @@ class Decoration extends Disposable implements IInternalDecoration {
|
||||
public readonly onDispose = this._onDispose.event;
|
||||
|
||||
// TODO: React to changes on options
|
||||
private _cachedBg: IColorRGB | undefined | null = null;
|
||||
public get backgroundColorRGB(): IColorRGB | undefined {
|
||||
private _cachedBg: IColor | undefined | null = null;
|
||||
public get backgroundColorRGB(): IColor | undefined {
|
||||
if (this._cachedBg === null) {
|
||||
if (this.options.backgroundColor) {
|
||||
this._cachedBg = toColorRGB(this.options.backgroundColor);
|
||||
this._cachedBg = css.toColor(this.options.backgroundColor);
|
||||
} else {
|
||||
this._cachedBg = undefined;
|
||||
}
|
||||
@@ -88,11 +89,11 @@ class Decoration extends Disposable implements IInternalDecoration {
|
||||
}
|
||||
|
||||
// TODO: React to changes on options
|
||||
private _cachedFg: IColorRGB | undefined | null = null;
|
||||
public get foregroundColorRGB(): IColorRGB | undefined {
|
||||
private _cachedFg: IColor | undefined | null = null;
|
||||
public get foregroundColorRGB(): IColor | undefined {
|
||||
if (this._cachedFg === null) {
|
||||
if (this.options.foregroundColor) {
|
||||
this._cachedFg = toColorRGB(this.options.foregroundColor);
|
||||
this._cachedFg = css.toColor(this.options.foregroundColor);
|
||||
} else {
|
||||
this._cachedFg = undefined;
|
||||
}
|
||||
@@ -119,11 +120,3 @@ class Decoration extends Disposable implements IInternalDecoration {
|
||||
super.dispose();
|
||||
}
|
||||
}
|
||||
|
||||
function toColorRGB(css: string): IColorRGB {
|
||||
// #rrggbb
|
||||
if (css.length === 7) {
|
||||
return [parseInt(css.slice(1, 3), 16), parseInt(css.slice(3, 5), 16), parseInt(css.slice(5, 7), 16)];
|
||||
}
|
||||
throw new Error('css.toColor: Unsupported css format');
|
||||
}
|
||||
|
||||
@@ -5,7 +5,7 @@
|
||||
|
||||
import { IEvent, IEventEmitter } from 'common/EventEmitter';
|
||||
import { IBuffer, IBufferSet } from 'common/buffer/Types';
|
||||
import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEncoding, ICoreMouseProtocol, CoreMouseEventType, ICharset, IWindowOptions, IModes, IAttributeData, ScrollSource, IDisposable, IColorRGB } from 'common/Types';
|
||||
import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEncoding, ICoreMouseProtocol, CoreMouseEventType, ICharset, IWindowOptions, IModes, IAttributeData, ScrollSource, IDisposable, IColorRGB, IColor } from 'common/Types';
|
||||
import { createDecorator } from 'common/services/ServiceRegistry';
|
||||
import { IDecorationOptions, IDecoration } from 'xterm';
|
||||
|
||||
@@ -313,7 +313,7 @@ export interface IDecorationService extends IDisposable {
|
||||
}
|
||||
export interface IInternalDecoration extends IDecoration {
|
||||
readonly options: IDecorationOptions;
|
||||
readonly backgroundColorRGB: IColorRGB | undefined;
|
||||
readonly foregroundColorRGB: IColorRGB | undefined;
|
||||
readonly backgroundColorRGB: IColor | undefined;
|
||||
readonly foregroundColorRGB: IColor | undefined;
|
||||
readonly onRenderEmitter: IEventEmitter<HTMLElement>;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user