https://istarik.ru/engine/lib/external/jquery/jquery.file.js

1;(function($) {
2
3jQuery.fn.choose = function(f) {
4	$(this).bind('choose', f);
5};
6
7
8jQuery.fn.file = function(options) {
9	var config = $.extend({
10		name: 'file-upload'
11	}, options);
12	return this.each(function() {
13		var btn = $(this);
14		var pos = btn.offset();
15
16		function update() {
17			pos = btn.offset();
18			file.css({
19				'top': pos.top,
20				'left': pos.left,
21				'width': btn.width(),
22				'height': btn.height()
23			});
24		}
25
26		btn.mouseover(update);
27
28		var hidden = $('<div></div>').css({
29			'display': 'none'
30		}).appendTo('body');
31
32		var file = $('<div id="area-form-file-'+config.name+'"><form></form></div>').appendTo('body').css({
33			'position': 'absolute',
34			'overflow': 'hidden',
35			'-moz-opacity': '0',
36			'filter':  'alpha(opacity: 0)',
37			'opacity': '0',
38			'cursor': 'pointer',
39			'z-index': '2'
40		});
41
42		var form = file.find('form');
43		var input = form.find('input');
44
45		function reset() {
46			var input = $('<input type="file" multiple>').attr('name',config.name).css({'cursor':'pointer'}).appendTo(form);
47			input.change(function(e) {
48				input.unbind();
49				input.detach();
50				btn.trigger('choose', [input]);
51				reset();
52			});
53		};
54
55		reset();
56
57		function placer(e) {
58			form.css('margin-left', e.pageX - pos.left - offset.width);
59			form.css('margin-top', e.pageY - pos.top - offset.height + 3);
60		}
61
62		function redirect(name) {
63			file[name](function(e) {
64				btn.trigger(name);
65			});
66		}
67
68		file.mousemove(placer);
69		btn.mousemove(placer);
70
71		redirect('mouseover');
72		redirect('mouseout');
73		redirect('mousedown');
74		redirect('mouseup');
75
76		var offset = {
77			width: file.width() - 25,
78			height: file.height() / 2
79		};
80
81		update();
82	});
83};
84
85})(jQuery);