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8 lines
3.3 KiB
JavaScript
8 lines
3.3 KiB
JavaScript
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/**
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* Copyright (c) 2007 Ariel Flesler - aflesler ○ gmail • com | https://github.com/flesler
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* Licensed under MIT
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* @author Ariel Flesler
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* @version 2.1.3
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*/
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;(function(factory){'use strict';if(typeof define==='function'&&define.amd){define(['jquery'],factory)}else if(typeof module!=='undefined'&&module.exports){module.exports=factory(require('jquery'))}else{factory(jQuery)}})(function($){'use strict';var $scrollTo=$.scrollTo=function(target,duration,settings){return $(window).scrollTo(target,duration,settings)};$scrollTo.defaults={axis:'xy',duration:0,limit:true};function isWin(elem){return!elem.nodeName||$.inArray(elem.nodeName.toLowerCase(),['iframe','#document','html','body'])!==-1}function isFunction(obj){return typeof obj==='function'}$.fn.scrollTo=function(target,duration,settings){if(typeof duration==='object'){settings=duration;duration=0}if(typeof settings==='function'){settings={onAfter:settings}}if(target==='max'){target=9e9}settings=$.extend({},$scrollTo.defaults,settings);duration=duration||settings.duration;var queue=settings.queue&&settings.axis.length>1;if(queue){duration/=2}settings.offset=both(settings.offset);settings.over=both(settings.over);return this.each(function(){if(target===null){return}var win=isWin(this),elem=win?this.contentWindow||window:this,$elem=$(elem),targ=target,attr={},toff;switch(typeof targ){case 'number':case 'string':if(/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test(targ)){targ=both(targ);break}targ=win?$(targ):$(targ,elem);case 'object':if(targ.length===0){return}if(targ.is||targ.style){toff=(targ=$(targ)).offset()}}var offset=isFunction(settings.offset)&&settings.offset(elem,targ)||settings.offset;$.each(settings.axis.split(''),function(i,axis){var Pos=axis==='x'?'Left':'Top',pos=Pos.toLowerCase(),key='scroll'+Pos,prev=$elem[key](),max=$scrollTo.max(elem,axis);if(toff){attr[key]=toff[pos]+(win?0:prev-$elem.offset()[pos]);if(settings.margin){attr[key]-=parseInt(targ.css('margin'+Pos),10)||0;attr[key]-=parseInt(targ.css('border'+Pos+'Width'),10)||0}attr[key]+=offset[pos]||0;if(settings.over[pos]){attr[key]+=targ[axis==='x'?'width':'height']()*settings.over[pos]}}else{var val=targ[pos];attr[key]=val.slice&&val.slice(-1)==='%'?parseFloat(val)/100*max:val}if(settings.limit&&/^\d+$/.test(attr[key])){attr[key]=attr[key]<=0?0:Math.min(attr[key],max)}if(!i&&settings.axis.length>1){if(prev===attr[key]){attr={}}else if(queue){animate(settings.onAfterFirst);attr={}}}});animate(settings.onAfter);function animate(callback){var opts=$.extend({},settings,{queue:true,duration:duration,complete:callback&&function(){callback.call(elem,targ,settings)}});$elem.animate(attr,opts)}})};$scrollTo.max=function(elem,axis){var Dim=axis==='x'?'Width':'Height',scroll='scroll'+Dim;if(!isWin(elem)){return elem[scroll]-$(elem)[Dim.toLowerCase()]()}var size='client'+Dim,doc=elem.ownerDocument||elem.document,html=doc.documentElement,body=doc.body;return Math.max(html[scroll],body[scroll])-Math.min(html[size],body[size])};function both(val){return isFunction(val)||$.isPlainObject(val)?val:{top:val,left:val}}$.Tween.propHooks.scrollLeft=$.Tween.propHooks.scrollTop={get:function(t){return $(t.elem)[t.prop]()},set:function(t){var curr=this.get(t);if(t.options.interrupt&&t._last&&t._last!==curr){return $(t.elem).stop()}var next=Math.round(t.now);if(curr!==next){$(t.elem)[t.prop](next);t._last=this.get(t)}}};return $scrollTo});
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