1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
|
(function($) {
// Public: jLabel Plugin
$.fn.jLabel = function(options) {
var states = new Array();
var opts = $.extend({}, $.fn.jLabel.defaults, options);
return this.each(function() {
$this = $(this);
states.push(new state($this));
$this
.focus(function() { focus($(this)); })
.blur(function() { blur($(this)); })
.keyup(function() { keyup($(this)); });
});
// Private: state object
function state($input) {
// Public Method: equals
this.equals = function($input) {
return $input.attr('id') == this.input.attr('id');
};
// Public Properties
this.input = $input;
this.label = getLabel($input);
// Construction code
if (this.input.val() != '') this.label.hide();
};
// Private: Get an input's related state
function getState($input) {
var state;
$.each(states, function() {
if (this.equals($input)) {
state = this;
return false; // Stop the jQuery loop running
};
});
return state;
};
// Private: Get an input's related label, or create a new one if none found
function getLabel($input) {
// Get the label related to the passed input
var $label = $('label[for=' + $input.attr('id') + ']');
// If no label has been found create one
if ($label.size() == 0) {
$label = $('<label>')
.attr('for', $input.attr('id'))
.text($input.attr('title'));
};
// If this is a new label insert it into the DOM, if not then move it directly before it's related input
$input.before($label);
// Style the label to mimic it's textbox formatting
$label
.css({
'font-family' : $input.css('font-family'),
'font-size' : $input.css('font-size'),
'font-style' : $input.css('font-style'),
'font-variant' : $input.css('font-variant'),
'font-weight' : $input.css('font-weight'),
'letter-spacing' : $input.css('letter-spacing'),
'line-height' : $input.css('line-height'),
'text-decoration' : $input.css('text-decoration'),
'text-transform' : $input.css('text-transform'),
'color' : $input.css('color'),
'cursor' : $input.css('cursor'),
'display' : 'inline-block'
});
// Stop the label from being selectable and position it relative to it's input
$label
.mousedown(function() { return false; })
.css({
'position' : 'relative',
'z-index' : '100',
'margin-right' : -$label.width(),
'left' : opts.xShift + parseInt($input.css("padding-left")) + 'px',
'top' : opts.yShift + 'px'
});
return $label;
};
// Private: Toggle label opacity on input focus
function focus($input) {
if ($input.val() == '') {
getState($input).label.stop().fadeTo(opts.speed, opts.opacity);
};
};
// Private: Toggle label opacity on input blur
function blur($input) {
if ($input.val() == '') {
getState($input).label.stop().fadeTo(opts.speed, 1);
};
};
// Private: Toggle label opacity on input key up
function keyup($input) {
var $label = getState($input).label;
if ($input.val() == '') {
$label.stop().fadeTo(opts.speed, opts.opacity);
} else {
if ($label.is(":visible")) $label.stop().fadeTo(opts.speed, 0, function() { $label.hide(); });
};
};
};
// Public: Default values
$.fn.jLabel.defaults = {
speed : 200,
opacity : 0.4,
xShift : 2,
yShift : 0
};
})(jQuery); |
Partager