Apple_Exporter\Builders\Components::anchor_together PHP Method

    private function anchor_together($component, $target_component)
    {
        if ($target_component->is_anchor_target()) {
            return;
        }
        // Get the component's anchor settings, if set
        $anchor_json = $component->get_json('anchor');
        // If the component doesn't have it's own anchor settings, use the defaults.
        if (empty($anchor_json)) {
            $anchor_json = array('targetAnchorPosition' => 'center', 'rangeStart' => 0, 'rangeLength' => 1);
        }
        // Regardless of what the component class specifies,
        // add the targetComponentIdentifier here.
        // There's no way for the class to know what this is before this point.
        $anchor_json['targetComponentIdentifier'] = $target_component->uid();
        // Add the JSON back to the component
        $component->set_json('anchor', $anchor_json);
        // Given $component, find out the opposite position.
        $other_position = null;
        if (Component::ANCHOR_AUTO == $component->get_anchor_position()) {
            $other_position = 'left' == $this->get_setting('body_orientation') ? Component::ANCHOR_LEFT : Component::ANCHOR_RIGHT;
        } else {
            $other_position = Component::ANCHOR_LEFT == $component->get_anchor_position() ? Component::ANCHOR_RIGHT : Component::ANCHOR_LEFT;
        }
        $target_component->set_anchor_position($other_position);
        // The anchor method adds the required layout, thus making the actual
        // anchoring. This must be called after using the UID, because we need to
        // distinguish target components from anchor ones and components with
        // UIDs are always anchor targets.
        $target_component->anchor();
        $component->anchor();
    }