delta-component/modules/logic/selection.js

embeddable react component

'use strict';


class Selection {
    constructor(lIndex, rIndex) {
        this.left = lIndex;
        this.right = rIndex;
    }

    set(lIndex, rIndex) {
        this.left = lIndex;
        this.right = rIndex;
    }

    move(rPosition) {
        /**
         * Параллельный сдвиг в сторону
         */
        const delta = this.right - rPosition;
        this.set(
            Math.max(0, this.left - delta),
            Math.max(0, this.right - delta)
        )
    }

    toNullWidth() {
        this.left = this.right;
    }

    getWidth() {
        return this.right - this.left;
    }

    toString() {
        return `Selection ${this.left}:${this.right}`;
    }
}


module.exports = {
    Selection,
};