Unable to set rows attribute for textarea input in the Customizer

[timhavinga]

Hi there,

Currently, when a textarea input is added to the Customizer via WP_Customize_Manager::add_control(), the number of rows is fixed to 5. See line 4140 of the Customize Manager.

Could this be fixed to be 5 by default, but enables me to override this?

[timhavinga]

Give custom control textareas 5 rows by default, but allow for a custom value

[timhavinga]

As shown in my patch, the defect was not in class-wp-customize-manager.php, but in class-wp-customize-control.php. The code in the Customize Manager seems to do the right thing, though it is not clear to me when this function is called.

[celloexpressions]

47445.patch​ makes sense to me, and allows the API to correctly let this attribute be set with the input_attrs property when registering a control. This needs some testing but looks close to being committable at a glance.