/**
 * Enhance a textarea with auto growing rows to fit the content.
 *
 * @module     core/auto_rows
 * @copyright  2016 Ryan Wyllie <ryan@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @since      3.2
 */
define("core/auto_rows",["jquery"],(function($){var SELECTORS_ELEMENT="[data-auto-rows]",EVENTS={ROW_CHANGE:"autorows:rowchange"},changeListener=function(e){var element=$(e.target),minRows=element.data("min-rows"),currentRows=element.attr("rows");void 0===minRows&&element.data("min-rows",currentRows),element.attr("rows",1);var rows=function(element){var currentRows=element.attr("rows"),minRows=element.data("min-rows"),maxRows=element.attr("data-max-rows"),height=element.height(),padding=element.innerHeight()-height,rows=(element[0].scrollHeight-padding)/(height/currentRows);return element.css("height",""),rows<minRows?minRows:maxRows&&rows>=maxRows?maxRows:rows}(element);element.attr("rows",rows),rows!=currentRows&&element.trigger(EVENTS.ROW_CHANGE)};return{init:function(root){$(root).data("auto-rows")?$(root).on("input propertychange",changeListener.bind(this)):$(root).on("input propertychange",SELECTORS_ELEMENT,changeListener.bind(this))},events:EVENTS}}));

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