// ==UserScript==
// @name        Input focus
// @namespace   -
// @description Input focus
// @version     1.1
// @grant       none
// ==/UserScript==
//
// 1.1
// - added toggle to blur field (ctrl+space).
//
(function() {
	function hasfocus(el) {
		return el === document.activeElement;
	}
	function findfield() {
		var found = null;
		var el = document.activeElement;
		if(typeof(el) == 'object') {
			var type = (el.type || '').toLowerCase();
			if(el.tagName == 'INPUT' && ['text', 'search'].indexOf(type) != -1)
				found = el;
		}
		if(found === null) {
			var els = document.getElementsByTagName('input') || [];
			for(var i = 0; i < els.length; i++) {
				var type = (els[i].type || '').toLowerCase();
				if(['text', 'search'].indexOf(type) != -1) {
					found = els[i];
					break;
				}
			}
		}
		if(found !== null) {
			return found;
		}
		return null;
	}
	function focusfield(el) {
		if(el === null)
			return el;
		el.click(); // Some sites require this to clear the input field.
		var value = el.value || '';
		el.selectionStart = 0; // value.length;
		el.selectionEnd = value.length;
		el.focus();
		return el;
	}
	function blurfield(el) {
		el.blur();
	}
	function onkeydown(e) {
		if(e.ctrlKey && e.keyCode == 32) { /* ctrl + space */
			var el = findfield();
			/* toggle */
			if(hasfocus(el)) {
				blurfield(el);
			} else {
				focusfield(el);
			}

		}
	}
	window.addEventListener('keydown', onkeydown, true);
//	focusfield(findfield());
})();