function createEmphasisDefaultState()

in src/util/states.ts [223:277]
48 lines of code
21 McCabe index (conditional complexity)

function createEmphasisDefaultState(
    el: Displayable,
    stateName: 'emphasis',
    targetStates: string[],
    state: Displayable['states'][number]
): DisplayableState {
    const hasSelect = targetStates && indexOf(targetStates, 'select') >= 0;
    let cloned = false;
    if (el instanceof Path) {
        const store = getSavedStates(el);
        const fromFill = hasSelect ? (store.selectFill || store.normalFill) : store.normalFill;
        const fromStroke = hasSelect ? (store.selectStroke || store.normalStroke) : store.normalStroke;
        if (hasFillOrStroke(fromFill) || hasFillOrStroke(fromStroke)) {
            state = state || {};
            let emphasisStyle = state.style || {};

            // inherit case
            if (emphasisStyle.fill === 'inherit') {
                cloned = true;
                state = extend({}, state);
                emphasisStyle = extend({}, emphasisStyle);
                emphasisStyle.fill = fromFill;
            }
            // Apply default color lift
            else if (!hasFillOrStroke(emphasisStyle.fill) && hasFillOrStroke(fromFill)) {
                cloned = true;
                // Not modify the original value.
                state = extend({}, state);
                emphasisStyle = extend({}, emphasisStyle);
                // Already being applied 'emphasis'. DON'T lift color multiple times.
                emphasisStyle.fill = liftColor(fromFill as ColorString);
            }
            // Not highlight stroke if fill has been highlighted.
            else if (!hasFillOrStroke(emphasisStyle.stroke) && hasFillOrStroke(fromStroke)) {
                if (!cloned) {
                    state = extend({}, state);
                    emphasisStyle = extend({}, emphasisStyle);
                }
                emphasisStyle.stroke = liftColor(fromStroke as ColorString);
            }
            state.style = emphasisStyle;
        }
    }
    if (state) {
        // TODO Share with textContent?
        if (state.z2 == null) {
            if (!cloned) {
                state = extend({}, state);
            }
            const z2EmphasisLift = (el as ECElement).z2EmphasisLift;
            state.z2 = el.z2 + (z2EmphasisLift != null ? z2EmphasisLift : Z2_EMPHASIS_LIFT);
        }
    }
    return state;
}