Function do_navigate_command

src/interface.rs:299–310

Given a navigation command, the current node is moved accordingly. This is a higher level interface than `do_navigate_keypress` for applications that want to interpret the keys themselves. The valid commands are: Standard move commands: `MovePrevious`, `MoveNext`, `MoveStart`, `MoveEnd`, `MoveLineStart`, `MoveLineEnd` Movement in a table or elementary math: `MoveCellPrevious`, `MoveCellNext`, `Mov

(command: String)

/// 
/// When done with Navigation, call with `Exit`
pub fn do_navigate_command(command: String) -> Result<String> {
    let command = NAV_COMMANDS.get_key(&command);       // gets a &'static version of the command
    if command.is_none() {
        bail!("Unknown command in call to DoNavigateCommand()");
    };
    let command = *command.unwrap();
    return MATHML_INSTANCE.with(|package_instance| {
        let package_instance = package_instance.borrow();
        let mathml = get_element(&package_instance);
        return do_navigate_command_string(mathml, command);
    });
}

/// Return the MathML associated with the current (navigation) node.
/// The returned result is the `id` of the node and the offset (0-based) from that node (not yet implemented)