behavior-copy.js
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behavior-copy.js
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	/**
	* @provides javelin-behavior-phabricator-clipboard-copy
	* @requires javelin-behavior
	* javelin-dom
	* javelin-stratcom
	* phabricator-notification
	* @javelin
	*/

	JX.behavior('phabricator-clipboard-copy', function() {

	var fallback_working = document.queryCommandSupported &&
	document.queryCommandSupported('copy');

	if (!navigator.clipboard && !fallback_working) {
	return;
	}

	JX.DOM.alterClass(document.body, 'supports-clipboard', true);

	var copy_fallback = function(text) {
	var attr = {
	value: text \|\| '',
	className: 'clipboard-buffer'
	};

	var node = JX.$N('textarea', attr);
	document.body.appendChild(node);

	node.select();
	document.execCommand('copy');

	JX.DOM.remove(node);
	};

	var show_success_message = function(message) {
	if (!message) {
	return;
	}
	new JX.Notification()
	.setContent(message)
	.alterClassName('jx-notification-done', true)
	.setDuration(8000)
	.show();
	};

	var show_error_message = function(message) {
	if (!message) {
	return;
	}
	new JX.Notification()
	.setContent(message)
	.alterClassName('jx-notification-error', true)
	.setDuration(8000)
	.show();
	};

	JX.Stratcom.listen('click', 'clipboard-copy', function(e) {
	var data = e.getNodeData('clipboard-copy');
	var text = data.text \|\| '';

	var copy = async function( // jshint ignore:line
	text,
	successMessage,
	errorMessage
	) {
	try {
	if (navigator.clipboard) {
	await navigator.clipboard.writeText(text);
	} else {
	copy_fallback(text);
	}
	show_success_message(successMessage);
	} catch (ex) {
	show_error_message(errorMessage);
	}
	};

	e.kill();
	copy(text, data.successMessage, data.errorMessage);
	});

	});