behavior-reorder-fields.js
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behavior-reorder-fields.js
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	/**
	* @provides javelin-behavior-config-reorder-fields
	* @requires javelin-behavior
	* javelin-stratcom
	* javelin-dom
	* javelin-json
	* phabricator-draggable-list
	*/

	JX.behavior('config-reorder-fields', function(config) {

	var fields = config.fields;
	var root = JX.$(config.listID);

	var list = new JX.DraggableList('field-spec', root)
	.setFindItemsHandler(function() {
	return JX.DOM.scry(root, 'li', 'field-spec');
	});

	list.listen('didDrop', function() {
	write_state_to_form();
	});

	JX.DOM.listen(root, 'click', 'field-spec-toggle', function(e) {
	e.kill();

	var key = e.getNodeData('field-spec').fieldKey;
	fields[key].disabled = !fields[key].disabled;

	JX.DOM.replace(
	e.getNode('field-spec'),
	JX.$H(
	fields[key].disabled ?
	fields[key].disabledMarkup :
	fields[key].enabledMarkup));

	write_state_to_form();
	});

	var write_state_to_form = function() {
	var nodes = list.findItems();
	var order = [];
	var key;
	for (var ii = 0; ii < nodes.length; ii++) {
	key = JX.Stratcom.getData(nodes[ii]).fieldKey;
	if (key) {
	order.push({
	key: key,
	disabled: fields[key].disabled
	});
	}
	}

	JX.$(config.inputID).value = JX.JSON.stringify(order);
	};

	write_state_to_form();
	});