application.js

对进制转换详细的说明文档

},
previous:function(element,expression,index){
element=$(element);
if(arguments.length==1)return $(Selector.handlers.previousElementSibling(element));
var previousSiblings=element.previousSiblings();
return Object.isNumber(expression)?previousSiblings[expression]:
Selector.findElement(previousSiblings,expression,index);
},
next:function(element,expression,index){
element=$(element);
if(arguments.length==1)return $(Selector.handlers.nextElementSibling(element));
var nextSiblings=element.nextSiblings();
return Object.isNumber(expression)?nextSiblings[expression]:
Selector.findElement(nextSiblings,expression,index);
},
select:function(){
var args=$A(arguments),element=$(args.shift());
return Selector.findChildElements(element,args);
},
adjacent:function(){
var args=$A(arguments),element=$(args.shift());
return Selector.findChildElements(element.parentNode,args).without(element);
},
identify:function(element){
element=$(element);
var id=element.readAttribute('id'),self=arguments.callee;
if(id)return id;
do{id='anonymous_element_'+self.counter++}while($(id));
element.writeAttribute('id',id);
return id;
},
readAttribute:function(element,name){
element=$(element);
if(Prototype.Browser.IE){
var t=Element._attributeTranslations.read;
if(t.values[name])return t.values[name](element,name);
if(t.names[name])name=t.names[name];
if(name.include(':')){
return(!element.attributes||!element.attributes[name])?null:
element.attributes[name].value;
}
}
return element.getAttribute(name);
},
writeAttribute:function(element,name,value){
element=$(element);
var attributes={},t=Element._attributeTranslations.write;
if(typeof name=='object')attributes=name;
else attributes[name]=Object.isUndefined(value)?true:value;
for(var attr in attributes){
name=t.names[attr]||attr;
value=attributes[attr];
if(t.values[attr])name=t.values[attr](element,value);
if(value===false||value===null)
element.removeAttribute(name);
else if(value===true)
element.setAttribute(name,name);
else element.setAttribute(name,value);
}
return element;
},
getHeight:function(element){
return $(element).getDimensions().height;
},
getWidth:function(element){
return $(element).getDimensions().width;
},
classNames:function(element){
return new Element.ClassNames(element);
},
hasClassName:function(element,className){
if(!(element=$(element)))return;
var elementClassName=element.className;
return(elementClassName.length>0&&(elementClassName==className||
new RegExp("(^|\\s)"+className+"(\\s|$)").test(elementClassName)));
},
addClassName:function(element,className){
if(!(element=$(element)))return;
if(!element.hasClassName(className))
element.className+=(element.className?' ':'')+className;
return element;
},
removeClassName:function(element,className){
if(!(element=$(element)))return;
element.className=element.className.replace(
new RegExp("(^|\\s+)"+className+"(\\s+|$)"),' ').strip();
return element;
},
toggleClassName:function(element,className){
if(!(element=$(element)))return;
return element[element.hasClassName(className)?
'removeClassName':'addClassName'](className);
},
cleanWhitespace:function(element){
element=$(element);
var node=element.firstChild;
while(node){
var nextNode=node.nextSibling;
if(node.nodeType==3&&!/\S/.test(node.nodeValue))
element.removeChild(node);
node=nextNode;
}
return element;
},
empty:function(element){
return $(element).innerHTML.blank();
},
descendantOf:function(element,ancestor){
element=$(element),ancestor=$(ancestor);
if(element.compareDocumentPosition)
return(element.compareDocumentPosition(ancestor)&8)===8;
if(ancestor.contains)
return ancestor.contains(element)&&ancestor!==element;
while(element=element.parentNode)
if(element==ancestor)return true;
return false;
},
scrollTo:function(element){
element=$(element);
var pos=element.cumulativeOffset();
window.scrollTo(pos[0],pos[1]);
return element;
},
getStyle:function(element,style){
element=$(element);
style=style=='float'?'cssFloat':style.camelize();
var value=element.style[style];
if(!value||value=='auto'){
var css=document.defaultView.getComputedStyle(element,null);
value=css?css[style]:null;
}
if(style=='opacity')return value?parseFloat(value):1.0;
return value=='auto'?null:value;
},
getOpacity:function(element){
return $(element).getStyle('opacity');
},
setStyle:function(element,styles){
element=$(element);
var elementStyle=element.style,match;
if(Object.isString(styles)){
element.style.cssText+=';'+styles;
return styles.include('opacity')?
element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]):element;
}
for(var property in styles)
if(property=='opacity')element.setOpacity(styles[property]);
else
elementStyle[(property=='float'||property=='cssFloat')?
(Object.isUndefined(elementStyle.styleFloat)?'cssFloat':'styleFloat'):
property]=styles[property];
return element;
},
setOpacity:function(element,value){
element=$(element);
element.style.opacity=(value==1||value==='')?'':
(value<0.00001)?0:value;
return element;
},
getDimensions:function(element){
element=$(element);
var display=element.getStyle('display');
if(display!='none'&&display!=null)
return{width:element.offsetWidth,height:element.offsetHeight};
var els=element.style;
var originalVisibility=els.visibility;
var originalPosition=els.position;
var originalDisplay=els.display;
els.visibility='hidden';
els.position='absolute';
els.display='block';
var originalWidth=element.clientWidth;
var originalHeight=element.clientHeight;
els.display=originalDisplay;
els.position=originalPosition;
els.visibility=originalVisibility;
return{width:originalWidth,height:originalHeight};
},
makePositioned:function(element){
element=$(element);
var pos=Element.getStyle(element,'position');
if(pos=='static'||!pos){
element._madePositioned=true;
element.style.position='relative';
if(Prototype.Browser.Opera){
element.style.top=0;
element.style.left=0;
}
}
return element;
},
undoPositioned:function(element){
element=$(element);
if(element._madePositioned){
element._madePositioned=undefined;
element.style.position=
element.style.top=
element.style.left=
element.style.bottom=
element.style.right='';
}
return element;
},
makeClipping:function(element){
element=$(element);
if(element._overflow)return element;
element._overflow=Element.getStyle(element,'overflow')||'auto';
if(element._overflow!=='hidden')
element.style.overflow='hidden';
return element;
},
undoClipping:function(element){
element=$(element);
if(!element._overflow)return element;
element.style.overflow=element._overflow=='auto'?'':element._overflow;
element._overflow=null;
return element;
},
cumulativeOffset:function(element){
var valueT=0,valueL=0;
do{
valueT+=element.offsetTop||0;
valueL+=element.offsetLeft||0;
element=element.offsetParent;
}while(element);
return Element._returnOffset(valueL,valueT);
},
positionedOffset:function(element){
var valueT=0,valueL=0;
do{
valueT+=element.offsetTop||0;
valueL+=element.offsetLeft||0;
element=element.offsetParent;
if(element){
if(element.tagName.toUpperCase()=='BODY')break;
var p=Element.getStyle(element,'position');
if(p!=='static')break;
}
}while(element);
return Element._returnOffset(valueL,valueT);
},
absolutize:function(element){
element=$(element);
if(element.getStyle('position')=='absolute')return element;
var offsets=element.positionedOffset();
var top=offsets[1];
var left=offsets[0];
var width=element.clientWidth;
var height=element.clientHeight;
element._originalLeft=left-parseFloat(element.style.left||0);
element._originalTop=top-parseFloat(element.style.top||0);
element._originalWidth=element.style.width;
element._originalHeight=element.style.height;
element.style.position='absolute';
element.style.top=top+'px';
element.style.left=left+'px';
element.style.width=width+'px';
element.style.height=height+'px';
return element;
},
relativize:function(element){
element=$(element);
if(element.getStyle('position')=='relative')return element;
element.style.position='relative';
var top=parseFloat(element.style.top||0)-(element._originalTop||0);
var left=parseFloat(element.style.left||0)-(element._originalLeft||0);
element.style.top=top+'px';
element.style.left=left+'px';
element.style.height=element._originalHeight;
element.style.width=element._originalWidth;
return element;
},
cumulativeScrollOffset:function(element){
var valueT=0,valueL=0;
do{
valueT+=element.scrollTop||0;
valueL+=element.scrollLeft||0;
element=element.parentNode;
}while(element);
return Element._returnOffset(valueL,valueT);
},
getOffsetParent:function(element){
if(element.offsetParent)return $(element.offsetParent);
if(element==document.body)return $(element);
while((element=element.parentNode)&&element!=document.body)
if(Element.getStyle(element,'position')!='static')
return $(element);
return $(document.body);
},
viewportOffset:function(forElement){
var valueT=0,valueL=0;
var element=forElement;
do{
valueT+=element.offsetTop||0;
valueL+=element.offsetLeft||0;
if(element.offsetParent==document.body&&
Element.getStyle(element,'position')=='absolute')break;
}while(element=element.offsetParent);
element=forElement;
do{
if(!Prototype.Browser.Opera||(element.tagName&&(element.tagName.toUpperCase()=='BODY'))){
valueT-=element.scrollTop||0;
valueL-=element.scrollLeft||0;
}
}while(element=element.parentNode);
return Element._returnOffset(valueL,valueT);
},
clonePosition:function(element,source){
var options=Object.extend({
setLeft:true,
setTop:true,
setWidth:true,
setHeight:true,
offsetTop:0,
offsetLeft:0
},arguments[2]||{});
source=$(source);
var p=source.viewportOffset();
element=$(element);
var delta=[0,0];
var parent=null;
if(Element.getStyle(element,'position')=='absolute'){
parent=element.getOffsetParent();
delta=parent.viewportOffset();
}
if(parent==document.body){
delta[0]-=document.body.offsetLeft;
delta[1]-=document.body.offsetTop;
}
if(options.setLeft)element.style.left=(p[0]-delta[0]+options.offsetLeft)+'px';
if(options.setTop)element.style.top=(p[1]-delta[1]+options.offsetTop)+'px';
if(options.setWidth)element.style.width=source.offsetWidth+'px';
if(options.setHeight)element.style.height=source.offsetHeight+'px';
return element;
}
};
Element.Methods.identify.counter=1;
Object.extend(Element.Methods,{
getElementsBySelector:Element.Methods.select,
childElements:Element.Methods.immediateDescendants
});
Element._attributeTranslations={
write:{
names:{
className:'class',
htmlFor:'for'
},
values:{}
}
};
if(Prototype.Browser.Opera){
Element.Methods.getStyle=Element.Methods.getStyle.wrap(
function(proceed,element,style){
switch(style){
case'left':case'top':case'right':case'bottom':
if(proceed(element,'position')==='static')return null;
case'height':case'width':
if(!Element.visible(element))return null;
var dim=parseInt(proceed(element,style),10);
if(dim!==element['offset'+style.capitalize()])
return dim+'px';
var properties;
if(style==='height'){
properties=['border-top-width','padding-top',
'padding-bottom','border-bottom-width'];
}
else{
properties=['border-left-width','padding-left',
'padding-right','border-right-width'];
}
return properties.inject(dim,function(memo,property){
var val=proceed(element,property);
return val===null?memo:memo-parseInt(val,10);
})+'px';
default:return proceed(element,style);
}
}
);
Element.Methods.readAttribute=Element.Methods.readAttribute.wrap(
function(proceed,element,attribute){
if(attribute==='title')return element.title;
return proceed(element,attribute);
}
);
}
else if(Prototype.Browser.IE){
Element.Methods.getOffsetParent=Element.Methods.getOffsetParent.wrap(
function(proceed,element){
element=$(element);
try{element.offsetParent}
catch(e){return $(document.body)}
var position=element.getStyle('position');
if(position!=='static')return proceed(element);
element.setStyle({position:'relative'});
var value=proceed(element);
element.setStyle({position:position});
return value;
}
);
$w('positionedOffset viewportOffset').each(function(method){
Element.Methods[method]=Element.Methods[method].wrap(
function(proceed,element){
element=$(element);
try{element.offsetParent}
catch(e){return Element._returnOffset(0,0)}
var position=element.getStyle('position');
if(position!=='static')return proceed(element);
var offsetParent=element.getOffsetParent();
if(offsetParent&&offsetParent.getStyle('position')==='fixed')
offsetParent.setStyle({zoom:1});
element.setStyle({position:'relative'});
var value=proceed(element);
element.setStyle({position:position});
return value;
}
);
});
Element.Methods.cumulativeOffset=Element.Methods.cumulativeOffset.wrap(
function(proceed,element){
try{element.offsetParent}
catch(e){return Element._returnOffset(0,0)}
return proceed(element);
}
);
Element.Methods.getStyle=function(element,style){
element=$(element);
style=(style=='float'||style=='cssFloat')?'styleFloat':style.camelize();
var value=element.style[style];
if(!value&&element.currentStyle)value=element.currentStyle[style];
if(style=='opacity'){
if(value=(element.getStyle('filter')||'').match(/alpha\(opacity=(.*)\)/))
if(value[1])return parseFloat(value[1])/100;
return 1.0;
}
if(value=='auto'){
if((style=='width'||style=='height')&&(element.getStyle('display')!='none'))
return element['offset'+style.capitalize()]+'px';
return null;
}
return value;
};
Element.Methods.setOpacity=function(element,value){
function stripAlpha(filter){
return filter.replace(/alpha\([^\)]*\)/gi,'');
}
element=$(element);
var currentStyle=element.currentStyle;
if((currentStyle&&!currentStyle.hasLayout)||
(!currentStyle&&element.style.zoom=='normal'))
element.style.zoom=1;
var filter=element.getStyle('filter'),style=element.style;
if(value==1||value===''){
(filter=stripAlpha(filter))?
style.filter=filter:style.removeAttribute('filter');
return element;
}else if(value<0.00001)value=0;
style.filter=stripAlpha(filter)+
'alpha(opacity='+(value*100)+')';
return element;
};
Element._attributeTranslations={
read:{
names:{
'class':'className',
'for':'htmlFor'
},
values:{
_getAttr:function(element,attribute){
return element.getAttribute(attribute,2);
},
_getAttrNode:function(element,attribute){
var node=element.getAttributeNode(attribute);
return node?node.value:"";
},
_getEv:function(element,attribute){
attribute=element.getAttribute(attribute);