mirror of
https://github.com/gamaio/unps.us-Shortener.git
synced 2024-12-22 10:12:41 +00:00
96 lines
3.5 KiB
JavaScript
96 lines
3.5 KiB
JavaScript
/*
|
|
* 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); |