Method add

lib/restructure/4-restructShorthand.js:160–251

(name, declaration)

    }

    add(name, declaration) {
        function attemptToAdd() {
            const sides = this.sides;
            const side = SIDE[name];

            if (side) {
                if (side in sides === false) {
                    return false;
                }

                const values = this.getValueSequence(declaration, 1);

                if (!values || !values.length) {
                    return false;
                }

                // can mix only if specials are equal
                for (const key in sides) {
                    if (sides[key] !== null && sides[key].special !== values[0].special) {
                        return false;
                    }
                }

                if (!this.canOverride(side, values[0])) {
                    return true;
                }

                sides[side] = values[0];

                return true;
            } else if (name === this.name) {
                const values = this.getValueSequence(declaration, 4);

                if (!values || !values.length) {
                    return false;
                }

                switch (values.length) {
                    case 1:
                        values[RIGHT] = values[TOP];
                        values[BOTTOM] = values[TOP];
                        values[LEFT] = values[TOP];
                        break;

                    case 2:
                        values[BOTTOM] = values[TOP];
                        values[LEFT] = values[RIGHT];
                        break;

                    case 3:
                        values[LEFT] = values[RIGHT];
                        break;
                }

                // can mix only if specials are equal
                for (let i = 0; i < 4; i++) {
                    for (const key in sides) {
                        if (sides[key] !== null && sides[key].special !== values[i].special) {