56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
|
(function($)
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Auto-growing textareas; technique ripped from Facebook
|
||
|
|
*
|
||
|
|
* http://github.com/jaz303/jquery-grab-bag/tree/master/javascripts/jquery.autogrow-textarea.js
|
||
|
|
*/
|
||
|
|
$.fn.autogrow = function(options)
|
||
|
|
{
|
||
|
|
return this.filter('textarea').each(function()
|
||
|
|
{
|
||
|
|
var self = this;
|
||
|
|
var $self = $(self);
|
||
|
|
var minHeight = $self.height();
|
||
|
|
var noFlickerPad = $self.hasClass('autogrow-short') ? 0 : parseInt($self.css('lineHeight'));
|
||
|
|
|
||
|
|
var shadow = $('<div></div>').css({
|
||
|
|
position: 'absolute',
|
||
|
|
top: -10000,
|
||
|
|
left: -10000,
|
||
|
|
width: $self.width(),
|
||
|
|
fontSize: $self.css('fontSize'),
|
||
|
|
fontFamily: $self.css('fontFamily'),
|
||
|
|
fontWeight: $self.css('fontWeight'),
|
||
|
|
lineHeight: $self.css('lineHeight'),
|
||
|
|
resize: 'none'
|
||
|
|
}).appendTo(document.body);
|
||
|
|
|
||
|
|
var update = function()
|
||
|
|
{
|
||
|
|
var times = function(string, number)
|
||
|
|
{
|
||
|
|
for (var i=0, r=''; i<number; i++) r += string;
|
||
|
|
return r;
|
||
|
|
};
|
||
|
|
|
||
|
|
var val = self.value.replace(/</g, '<')
|
||
|
|
.replace(/>/g, '>')
|
||
|
|
.replace(/&/g, '&')
|
||
|
|
.replace(/\n$/, '<br/> ')
|
||
|
|
.replace(/\n/g, '<br/>')
|
||
|
|
.replace(/ {2,}/g, function(space){ return times(' ', space.length - 1) + ' ' });
|
||
|
|
|
||
|
|
shadow.css('width', $self.width());
|
||
|
|
shadow.html(val);
|
||
|
|
$self.css('height', Math.max(shadow.height() + noFlickerPad, minHeight));
|
||
|
|
}
|
||
|
|
|
||
|
|
$self.change(update).keyup(update).keydown(update);
|
||
|
|
$(window).resize(update);
|
||
|
|
|
||
|
|
update();
|
||
|
|
});
|
||
|
|
};
|
||
|
|
})(jQuery);
|