@specs-feup/lara/api/lara/units/UnitWithModifier.js

A js port of the popular framework for building source-to-source compilers

import Unit from "./Unit.js";
/**
 * ! If you are ever in need of using this class, please PLEASE refactor it.
 * ! Just do it. I did not have the time to do it myself and did not want to break compatibility with the old Margot APIs.
 */
export default class UnitWithModifier extends Unit {
    _unitModifier;
    _baseUnit;
    _modifier;
    constructor(unitModifier, baseUnit, modifier) {
        super();
        this._unitModifier = unitModifier;
        if (modifier == undefined) {
            modifier = unitModifier.getBase();
        }
        this._unitModifier.checkModifier(modifier, "UnitWithModifier::modifier");
        this._baseUnit = baseUnit;
        this._modifier = modifier;
    }
    getName() {
        return this._modifier + this._baseUnit;
    }
    /**
     * @param unit - Unit of the value.
     */
    convert(value, unit, unitHasBaseName = false) {
        const fromModifier = this._extractModifier(unit, unitHasBaseName);
        return this._unitModifier.convert(value, fromModifier, this._modifier);
    }
    _extractModifier(unit, unitHasBaseName) {
        let currentModifier = unit;
        // Check that unit ends with the baseUnit
        if (unitHasBaseName) {
            if (currentModifier.endsWith(this._baseUnit)) {
                currentModifier = currentModifier.substring(0, currentModifier.length - this._baseUnit.length);
            }
        }
        currentModifier = this._unitModifier.normalize(currentModifier);
        this._unitModifier.checkModifier(currentModifier, "UnitWithModifier._extractModifier::unit");
        return currentModifier;
    }
}
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