freenetis-github/media/js/jquery.autoresize.js @ master
| 8baed187 | Michal Kliment | /*
|
|
* jQuery autoResize (textarea auto-resizer)
|
|||
* @copyright James Padolsey http://james.padolsey.com
|
|||
* @version 1.04
|
|||
*/
|
|||
(function($){
|
|||
$.fn.autoResize = function(options) {
|
|||
// Just some abstracted details,
|
|||
// to make plugin users happy:
|
|||
var settings = $.extend({
|
|||
onResize : function(){},
|
|||
animate : true,
|
|||
animateDuration : 150,
|
|||
animateCallback : function(){},
|
|||
extraSpace : 20,
|
|||
limit: 1000
|
|||
}, options);
|
|||
// Only textarea's auto-resize:
|
|||
this.filter('textarea').each(function(){
|
|||
// Get rid of scrollbars and disable WebKit resizing:
|
|||
var textarea = $(this).css({resize:'none','overflow-y':'hidden'}),
|
|||
// Cache original height, for use later:
|
|||
origHeight = textarea.height(),
|
|||
// Need clone of textarea, hidden off screen:
|
|||
clone = (function(){
|
|||
// Properties which may effect space taken up by chracters:
|
|||
var props = ['height','width','lineHeight','textDecoration','letterSpacing'],
|
|||
propOb = {};
|
|||
// Create object of styles to apply:
|
|||
$.each(props, function(i, prop){
|
|||
propOb[prop] = textarea.css(prop);
|
|||
});
|
|||
// Clone the actual textarea removing unique properties
|
|||
// and insert before original textarea:
|
|||
return textarea.clone().removeAttr('id').removeAttr('name').css({
|
|||
position: 'absolute',
|
|||
top: 0,
|
|||
left: -9999
|
|||
}).css(propOb).attr('tabIndex','-1').insertBefore(textarea);
|
|||
})(),
|
|||
lastScrollTop = null,
|
|||
updateSize = function() {
|
|||
// Prepare the clone:
|
|||
clone.height(0).val($(this).val()).scrollTop(10000);
|
|||
// Find the height of text:
|
|||
var scrollTop = Math.max(clone.scrollTop(), origHeight) + settings.extraSpace,
|
|||
toChange = $(this).add(clone);
|
|||
// Don't do anything if scrollTip hasen't changed:
|
|||
if (lastScrollTop === scrollTop) { return; }
|
|||
lastScrollTop = scrollTop;
|
|||
// Check for limit:
|
|||
if ( scrollTop >= settings.limit ) {
|
|||
$(this).css('overflow-y','');
|
|||
return;
|
|||
}
|
|||
// Fire off callback:
|
|||
settings.onResize.call(this);
|
|||
// Either animate or directly apply height:
|
|||
settings.animate && textarea.css('display') === 'block' ?
|
|||
toChange.stop().animate({height:scrollTop}, settings.animateDuration, settings.animateCallback)
|
|||
: toChange.height(scrollTop);
|
|||
};
|
|||
// Bind namespaced handlers to appropriate events:
|
|||
textarea
|
|||
.unbind('.dynSiz')
|
|||
.bind('keyup.dynSiz', updateSize)
|
|||
.bind('keydown.dynSiz', updateSize)
|
|||
.bind('change.dynSiz', updateSize);
|
|||
});
|
|||
// Chain:
|
|||
return this;
|
|||
};
|
|||
})(jQuery);
|