Method insert_node_before

src/jsmind.js:619–642

* Insert a node before target node. * @param {string | import('./jsmind.node.js').Node} node_before * @param {string} node_id * @param {string} topic * @param {Record =} data * @param {('left'|'center'|'right'|'-1'|'0'|'1'|number)=} direction - Direction for node

(node_before, node_id, topic, data, direction)

     * @returns {import('./jsmind.node.js').Node|null}
     */
    insert_node_before(node_before, node_id, topic, data, direction) {
        if (this.get_editable()) {
            var the_node_before = this.get_node(node_before);
            var dir = Direction.of(direction);
            if (dir === undefined) {
                dir = this.layout.calculate_next_child_direction(the_node_before.parent);
            }
            var node = this.mind.insert_node_before(the_node_before, node_id, topic, data, dir);
            if (!!node) {
                this.view.add_node(node);
                this.layout.layout();
                this.view.show(false);
                this.invoke_event_handle(EventType.edit, {
                    evt: 'insert_node_before',
                    data: [the_node_before.id, node_id, topic, data, dir],
                    node: node_id,
                });
            }
            return node;
        } else {
            logger.error('fail, this mind map is not editable');
            return null;
        }
    }
    /**
     * Insert a node after target node.
     * @param {string | import('./jsmind.node.js').Node} node_after