Method unplugFromRow

packages/blockly/core/block.ts:419–458

* Unplug this block's output from an input on another block. Optionally * reconnect the block's parent to the only child block, if possible. * * @param opt_healStack Disconnect right-side block and connect to left-side * block. Defaults to false.

(opt_healStack?: boolean)

   *     block.  Defaults to false.
   */
  private unplugFromRow(opt_healStack?: boolean) {
    let parentConnection = null;
    if (this.outputConnection?.isConnected()) {
      parentConnection = this.outputConnection.targetConnection;
      // Disconnect from any superior block.
      this.outputConnection.disconnect();
    }

    // Return early in obvious cases.
    if (!parentConnection || !opt_healStack) {
      return;
    }

    const thisConnection = this.getOnlyValueConnection();
    if (
      !thisConnection ||
      !thisConnection.isConnected() ||
      thisConnection.targetBlock()!.isShadow()
    ) {
      // Too many or too few possible connections on this block, or there's
      // nothing on the other side of this connection.
      return;
    }

    const childConnection = thisConnection.targetConnection;
    // Disconnect the child block.
    childConnection?.disconnect();
    // Connect child to the parent if possible, otherwise bump away.
    if (
      this.workspace.connectionChecker.canConnect(
        childConnection,
        parentConnection,
        false,
      )
    ) {
      parentConnection.connect(childConnection!);
    } else {
      childConnection?.onFailedConnect(parentConnection);
    }
  }

  /**
   * Returns the connection on the value input that is connected to another