☰

Focus input text field on Esc

Focus the first visible input text field when you press Esc key, or restore the previously focused element on second press

Från och med 2016-03-11. Se den senaste versionen.

// ==UserScript==
// @name          Focus input text field on Esc
// @description   Focus the first visible input text field when you press Esc key, or restore the previously focused element on second press
// @version       1.0.4
// @include       *
// @author        wOxxOm
// @namespace     wOxxOm.scripts
// @license       MIT License
// @run-at        document-start
// ==/UserScript==

var TEXT_FIELD = ' search text number url ';
var previousElement;
var first;

document.addEventListener('keydown', function(e) {
	if (e.keyCode != 27 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey)
		return;
	// find text inputs inside visible DOM containers
	var inputs = document.getElementsByTagName('input');
	for (var i=0, input, il=inputs.length; i<il && (input=inputs[i]); i++) {
		var priority = TEXT_FIELD.indexOf(' '+input.type+' ');
		if (priority >= 0) {
			var n=input, style;
			while (n && n.style && (style=getComputedStyle(n)) && style.display!='none' && style.visibility!='hidden')
				n = n.parentNode;
			if (!n || !n.style) {
				if (!first // set the first OR if it's empty, try to select an identically named input field with some text (happens on some sites)
						|| (input.value && input.name == first.name && (!input.form && !first.form || input.form.action == first.form.action))) {
					first = input;
					if (first.value)
						break;
				}
			}
		}
	}

	if (first) {
		if (first != document.activeElement) {
			// switch to the found input field
			previousElement = document.activeElement;
			onkeyup(function(){
				first.focus();
				first.select();
			});
		} else if (previousElement) {
			// restore focus to the element from which we jumped to an input field previously
			onkeyup(function(){
				document.activeElement.blur(); // in case document.body (page "background") was previously selected
				previousElement.focus();
			});
		}
	}

	// focusing should be done at key-up to prevent the Esc-keydown being also chain-handled by the just focused element
	function onkeyup(cb) {
		document.addEventListener('keyup', function keyup(e) {
			if (e.keyCode == 27) {
				document.removeEventListener('keyup', keyup);
				cb(e);
			}
		});
	}
});