Focus the first visible input text field when you press Esc key, or restore the previously focused element on second press
目前為
// ==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);
}
});
}
});