Class TabIterator

CodenameOne/src/com/codename1/ui/Form.java:4850–5043

    ///
    /// - #getTabIterator(com.codename1.ui.Component)
    public static class TabIterator implements ListIterator<Component> {
        private final java.util.List<Component> components;
        private int currPos;
        private Component current;

        private TabIterator(java.util.List<Component> components, Component current) {
            this.components = components;
            setCurrent(current);
        }

        /// Gets the current component in this iterator.
        public Component getCurrent() {
            return current;
        }

        /// Sets the current component in the iterator.  This reposition the iterator
        /// to the given component.
        ///
        /// #### Parameters
        ///
        /// - `cmp`: The component to set as the current component.
        public void setCurrent(Component cmp) {
            current = cmp;

            currPos = cmp != null ? components.indexOf(cmp) : -1;
        }

        /// Gets the next component in this iterator.  If the current component explicitly specifies
        /// a nextFocusRight or nextFocusDown component, then that component will be returned.
        /// Otherwise it will follow the tab index order.
        ///
        /// #### Returns
        ///
        /// The next component to be traversed after `#getCurrent()`
        public Component getNext() {
            Component current = getCurrent();
            if (current == null && components.isEmpty()) {
                return null;
            }

            Component next = current != null ? current.getNextFocusRight() : null;
            if (next != null && next.isFocusable() && next.isVisible() && next.isEnabled()) {
                return next;
            }
            next = current != null ? current.getNextFocusDown() : null;
            if (next != null && next.isFocusable() && next.isVisible() && next.isEnabled()) {
                return next;
            }
            if (currPos < 0 && !components.isEmpty()) {
                return components.get(0);
            }
            if (currPos < components.size() - 1) {
                return components.get(currPos + 1);
            }
            return null;
        }

        /// Gets the previous component that should be traversed when going "back" in through the