当前文件： AjaxChat/js/niftycube.js[8K，2009-6-12 11:31:35]，打开代码结构图

		            
  1/**//* Nifty Corners Cube - rounded corners with CSS and Javascript
  2Copyright 2006 Alessandro Fulciniti (a.fulciniti@html.it)
  3
  4This program is free software; you can redistribute it and/or modify
  5it under the terms of the GNU General Public License as published by
  6the Free Software Foundation; either version 2 of the License, or
  7(at your option) any later version.
  8
  9This program is distributed in the hope that it will be useful,
 10but WITHOUT ANY WARRANTY; without even the implied warranty of
 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12GNU General Public License for more details.
 13
 14You should have received a copy of the GNU General Public License
 15along with this program; if not, write to the Free Software
 16Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17*/
 18
 19var niftyOk=(document.getElementById && document.createElement && Array.prototype.push);
 20var niftyCss=false;
 21
 22String.prototype.find=function(what)...{
 23return(this.indexOf(what)>=0 ? true : false);
 24}
 25
 26var oldonload=window.onload;
 27if(typeof(NiftyLoad)!='function') NiftyLoad=function()...{};
 28if(typeof(oldonload)=='function')
 29    window.onload=function()...{oldonload();AddCss();NiftyLoad()};
 30else window.onload=function()...{AddCss();NiftyLoad()};
 31
 32function AddCss()...{
 33niftyCss=true;
 34var l=CreateEl("link");
 35l.setAttribute("type","text/css");
 36l.setAttribute("rel","stylesheet");
 37l.setAttribute("href","niftyCorners.css");
 38l.setAttribute("media","screen");
 39document.getElementsByTagName("head")[0].appendChild(l);
 40}
 41
 42function Nifty(selector,options)...{
 43if(niftyOk==false) return;
 44if(niftyCss==false) AddCss();
 45var i,v=selector.split(","),h=0;
 46if(options==null) options="";
 47if(options.find("fixed-height"))
 48    h=getElementsBySelector(v[0])[0].offsetHeight;
 49for(i=0;i<v.length;i++)
 50    Rounded(v[i],options);
 51if(options.find("height")) SameHeight(selector,h);
 52}
 53
 54function Rounded(selector,options)...{
 55var i,top="",bottom="",v=new Array();
 56if(options!="")...{
 57    options=options.replace("left","tl bl");
 58    options=options.replace("right","tr br");
 59    options=options.replace("top","tr tl");
 60    options=options.replace("bottom","br bl");
 61    options=options.replace("transparent","alias");
 62    if(options.find("tl"))...{
 63        top="both";
 64        if(!options.find("tr")) top="left";
 65        }
 66    else if(options.find("tr")) top="right";
 67    if(options.find("bl"))...{
 68        bottom="both";
 69        if(!options.find("br")) bottom="left";
 70        }
 71    else if(options.find("br")) bottom="right";
 72    }
 73if(top=="" && bottom=="" && !options.find("none"))...{top="both";bottom="both";}
 74v=getElementsBySelector(selector);
 75for(i=0;i<v.length;i++)...{
 76    FixIE(v[i]);
 77    if(top!="") AddTop(v[i],top,options);
 78    if(bottom!="") AddBottom(v[i],bottom,options);
 79    }
 80}
 81
 82function AddTop(el,side,options)...{
 83var d=CreateEl("b"),lim=4,border="",p,i,btype="r",bk,color;
 84d.style.marginLeft="-"+getPadding(el,"Left")+"px";
 85d.style.marginRight="-"+getPadding(el,"Right")+"px";
 86if(options.find("alias") || (color=getBk(el))=="transparent")...{
 87    color="transparent";bk="transparent"; border=getParentBk(el);btype="t";
 88    }
 89else...{
 90    bk=getParentBk(el); border=Mix(color,bk);
 91    }
 92d.style.background=bk;
 93d.className="niftycorners";
 94p=getPadding(el,"Top");
 95if(options.find("small"))...{
 96    d.style.marginBottom=(p-2)+"px";
 97    btype+="s"; lim=2;
 98    }
 99else if(options.find("big"))...{
100    d.style.marginBottom=(p-10)+"px";
101    btype+="b"; lim=8;
102    }
103else d.style.marginBottom=(p-5)+"px";
104for(i=1;i<=lim;i++)
105    d.appendChild(CreateStrip(i,side,color,border,btype));
106el.style.paddingTop="0";
107el.insertBefore(d,el.firstChild);
108}
109
110function AddBottom(el,side,options)...{
111var d=CreateEl("b"),lim=4,border="",p,i,btype="r",bk,color;
112d.style.marginLeft="-"+getPadding(el,"Left")+"px";
113d.style.marginRight="-"+getPadding(el,"Right")+"px";
114if(options.find("alias") || (color=getBk(el))=="transparent")...{
115    color="transparent";bk="transparent"; border=getParentBk(el);btype="t";
116    }
117else...{
118    bk=getParentBk(el); border=Mix(color,bk);
119    }
120d.style.background=bk;
121d.className="niftycorners";
122p=getPadding(el,"Bottom");
123if(options.find("small"))...{
124    d.style.marginTop=(p-2)+"px";
125    btype+="s"; lim=2;
126    }
127else if(options.find("big"))...{
128    d.style.marginTop=(p-10)+"px";
129    btype+="b"; lim=8;
130    }
131else d.style.marginTop=(p-5)+"px";
132for(i=lim;i>0;i--)
133    d.appendChild(CreateStrip(i,side,color,border,btype));
134el.style.paddingBottom=0;
135el.appendChild(d);
136}
137
138function CreateStrip(index,side,color,border,btype)...{
139var x=CreateEl("b");
140x.className=btype+index;
141x.style.backgroundColor=color;
142x.style.borderColor=border;
143if(side=="left")...{
144    x.style.borderRightWidth="0";
145    x.style.marginRight="0";
146    }
147else if(side=="right")...{
148    x.style.borderLeftWidth="0";
149    x.style.marginLeft="0";
150    }
151return(x);
152}
153
154function CreateEl(x)...{
155return(document.createElement(x));
156}
157
158function FixIE(el)...{
159if(el.currentStyle!=null && el.currentStyle.hasLayout!=null && el.currentStyle.hasLayout==false)
160    el.style.display="inline-block";
161}
162
163function SameHeight(selector,maxh)...{
164var i,v=selector.split(","),t,j,els=[],gap;
165for(i=0;i<v.length;i++)...{
166    t=getElementsBySelector(v[i]);
167    els=els.concat(t);
168    }
169for(i=0;i<els.length;i++)...{
170    if(els[i].offsetHeight>maxh) maxh=els[i].offsetHeight;
171    els[i].style.height="auto";
172    }
173for(i=0;i<els.length;i++)...{
174    gap=maxh-els[i].offsetHeight;
175    if(gap>0)...{
176        t=CreateEl("b");t.className="niftyfill";t.style.height=gap+"px";
177        nc=els[i].lastChild;
178        if(nc.className=="niftycorners")
179            els[i].insertBefore(t,nc);
180        else els[i].appendChild(t);
181        }
182    }
183}
184
185function getElementsBySelector(selector)...{
186var i,j,selid="",selclass="",tag=selector,tag2="",v2,k,f,a,s=[],objlist=[],c;
187if(selector.find("#"))...{ //id selector like "tag#id"
188    if(selector.find(" "))...{  //descendant selector like "tag#id tag"
189        s=selector.split(" ");
190        var fs=s[0].split("#");
191        if(fs.length==1) return(objlist);
192        f=document.getElementById(fs[1]);
193        if(f)...{
194            v=f.getElementsByTagName(s[1]);
195            for(i=0;i<v.length;i++) objlist.push(v[i]);
196            }
197        return(objlist);
198        }
199    else...{
200        s=selector.split("#");
201        tag=s[0];
202        selid=s[1];
203        if(selid!="")...{
204            f=document.getElementById(selid);
205            if(f) objlist.push(f);
206            return(objlist);
207            }
208        }
209    }
210if(selector.find("."))...{      //class selector like "tag.class"
211    s=selector.split(".");
212    tag=s[0];
213    selclass=s[1];
214    if(selclass.find(" "))...{   //descendant selector like tag1.classname tag2
215        s=selclass.split(" ");
216        selclass=s[0];
217        tag2=s[1];
218        }
219    }
220var v=document.getElementsByTagName(tag);  // tag selector like "tag"
221if(selclass=="")...{
222    for(i=0;i<v.length;i++) objlist.push(v[i]);
223    return(objlist);
224    }
225for(i=0;i<v.length;i++)...{
226    c=v[i].className.split(" ");
227    for(j=0;j<c.length;j++)...{
228        if(c[j]==selclass)...{
229            if(tag2=="") objlist.push(v[i]);
230            else...{
231                v2=v[i].getElementsByTagName(tag2);
232                for(k=0;k<v2.length;k++) objlist.push(v2[k]);
233                }
234            }
235        }
236    }
237return(objlist);
238}
239
240function getParentBk(x)...{
241var el=x.parentNode,c;
242while(el.tagName.toUpperCase()!="HTML" && (c=getBk(el))=="transparent")
243    el=el.parentNode;
244if(c=="transparent") c="#FFFFFF";
245return(c);
246}
247
248function getBk(x)...{
249var c=getStyleProp(x,"backgroundColor");
250if(c==null || c=="transparent" || c.find("rgba(0, 0, 0, 0)"))
251    return("transparent");
252if(c.find("rgb")) c=rgb2hex(c);
253return(c);
254}
255
256function getPadding(x,side)...{
257var p=getStyleProp(x,"padding"+side);
258if(p==null || !p.find("px")) return(0);
259return(parseInt(p));
260}
261
262function getStyleProp(x,prop)...{
263if(x.currentStyle)
264    return(x.currentStyle[prop]);
265if(document.defaultView.getComputedStyle)
266    return(document.defaultView.getComputedStyle(x,'')[prop]);
267return(null);
268}
269
270function rgb2hex(value)...{
271var hex="",v,h,i;
272var regexp=/([0-9]+)[, ]+([0-9]+)[, ]+([0-9]+)/;
273var h=regexp.exec(value);
274for(i=1;i<4;i++)...{
275    v=parseInt(h[i]).toString(16);
276    if(v.length==1) hex+="0"+v;
277    else hex+=v;
278    }
279return("#"+hex);
280}
281
282function Mix(c1,c2)...{
283var i,step1,step2,x,y,r=new Array(3);
284if(c1.length==4)step1=1;
285else step1=2;
286if(c2.length==4) step2=1;
287else step2=2;
288for(i=0;i<3;i++)...{
289    x=parseInt(c1.substr(1+step1*i,step1),16);
290    if(step1==1) x=16*x+x;
291    y=parseInt(c2.substr(1+step2*i,step2),16);
292    if(step2==1) y=16*y+y;
293    r[i]=Math.floor((x*50+y*50)/100);
294    r[i]=r[i].toString(16);
295    if(r[i].length==1) r[i]="0"+r[i];
296    }
297return("#"+r[0]+r[1]+r[2]);
298}