@tokens-studio/graph-engine/dist/nodes/color/distance.js

An execution engine to handle Token Studios generators and resolvers

import { Black, White, toColor } from './lib/utils.js';
import { ColorSchema, NumberSchema, StringSchema } from '../../schemas/index.js';
import { Node } from '../../programmatic/node.js';
import { setToPrecision } from '../../utils/precision.js';
export const colorSpaces = ['Lab', 'ICtCp', 'Jzazbz'];
export default class NodeDefinition extends Node {
    static title = 'Distance';
    static type = 'studio.tokens.color.distance';
    static description = 'Calculate the distance between two colors. The output is a number representing the difference between the two colors. The lower the number, the closer the colors are to each other. The output is based on the CIEDE2000 color difference formula.';
    constructor(props) {
        super(props);
        this.addInput('colorA', {
            type: {
                ...ColorSchema,
                default: White
            }
        });
        this.addInput('colorB', {
            type: {
                ...ColorSchema,
                default: Black
            }
        });
        this.addInput('precision', {
            type: {
                ...NumberSchema,
                default: 4
            }
        });
        this.addInput('space', {
            type: {
                ...StringSchema,
                enum: colorSpaces,
                default: 'Lab'
            }
        });
        this.addOutput('value', {
            type: NumberSchema
        });
    }
    execute() {
        const { colorA, colorB, space, precision } = this.getAllInputs();
        const a = toColor(colorA);
        const b = toColor(colorB);
        const distance = a.distance(b, space);
        this.outputs.value.set(setToPrecision(distance, precision));
    }
}
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