WebformConditionals::executeConditionals fails to load necessary functions for certain conditional types

Problem/Motivation

hook_webform_component_info() allows developers to define components, including the component's conditional type. See below from webform.api.php:

    // Specify the conditional behaviour of this component.
    // Examples are 'string', 'date', 'time', 'numeric', 'select'.
    // Defaults to 'string'.
    'conditional_type' => 'string',

All functions needed for the 'string', 'date', and 'time' conditional types are stored in the webform.conditionals.inc include file; however, in the case of 'numeric' and 'select', the functions needed for their conditional behavior are stored in their respective include files - number.inc and select.inc. As a result, when a module defines a conditional type of either 'numeric' or 'select', then the conditional operator callback will call one or more functions that are not loaded. This will cause a fatal error. (Exception: a 'number' or 'select' component has been added to the form, which would cause the needed include file to be included)

In the case of the 'numeric' conditional type, several conditional operator callback functions call webform_compare_floats(), which is stored in number.inc.

In the case of the 'select' conditional type, several conditional operator callback functions call _webform_select_options(), which is stored in select.inc. It, in turn, calls three additional functions that are also stored in select.inc.

Proposed resolution

There are basically two solutions:

1. Move the functions required for conditional behavior to webform.conditionals.inc.
2. In WebformConditionals::executeConditionals, check for missing include files and then include them.

Remaining tasks

Maintainer feedback

User interface changes

None anticipated

API changes

None anticipated

Data model changes

None anticipated