?? lunar.js
字號:
var i, leap=0, temp=0;
var offset = (Date.UTC(objDate.getFullYear(),objDate.getMonth(),objDate.getDate()) - Date.UTC(1900,0,31))/86400000;
for(i=1900; i<2050 && offset>0; i++) { temp=lYearDays(i); offset-=temp; }
if(offset<0) { offset+=temp; i--; }
this.year = i;
leap = leapMonth(i); //閏哪個月
this.isLeap = false;
for(i=1; i<13 && offset>0; i++) {
//閏月
if(leap>0 && i==(leap+1) && this.isLeap==false)
{ --i; this.isLeap = true; temp = leapDays(this.year); }
else
{ temp = monthDays(this.year, i); }
//解除閏月
if(this.isLeap==true && i==(leap+1)) this.isLeap = false;
offset -= temp;
}
if(offset==0 && leap>0 && i==leap+1)
if(this.isLeap)
{ this.isLeap = false; }
else
{ this.isLeap = true; --i; }
if(offset<0){ offset += temp; --i; }
this.month = i;
this.day = offset + 1;
}
//==============================傳回國歷 y年某m+1月的天數(shù)
function solarDays(y,m) {
if(m==1)
return(((y%4 == 0) && (y%100 != 0) || (y%400 == 0))? 29: 28);
else
return(solarMonth[m]);
}
//============================== 傳入 offset 傳回干支, 0=甲子
function cyclical(num) {
return(Gan[num%10]+Zhi[num%12]);
}
//============================== 月歷屬性
function calElement(sYear,sMonth,sDay,week,lYear,lMonth,lDay,isLeap,cYear,cMonth,cDay) {
this.isToday = false;
//國歷
this.sYear = sYear; //西元年4位數(shù)字
this.sMonth = sMonth; //西元月數(shù)字
this.sDay = sDay; //西元日數(shù)字
this.week = week; //星期, 1個中文
//農(nóng)歷
this.lYear = lYear; //西元年4位數(shù)字
this.lMonth = lMonth; //農(nóng)歷月數(shù)字
this.lDay = lDay; //農(nóng)歷日數(shù)字
this.isLeap = isLeap; //是否為農(nóng)歷閏月?
//八字
this.cYear = cYear; //年柱, 2個中文
this.cMonth = cMonth; //月柱, 2個中文
this.cDay = cDay; //日柱, 2個中文
this.color = '';
this.lunarFestival = ''; //農(nóng)歷節(jié)日
this.solarFestival1 = ''; //國歷節(jié)日1
this.solarFestival2 = ''; //國歷節(jié)日2
this.solarFestival3 = ''; //國歷節(jié)日3
this.solarTerms = ''; //節(jié)氣
}
//===== 某年的第n個節(jié)氣為幾日(從0小寒起算)
function sTerm(y,n) {
var offDate = new Date( ( 31556925974.7*(y-1900) + sTermInfo[n]*60000 ) + Date.UTC(1900,0,6,2,5) );
return(offDate.getUTCDate());
}
//============================== 傳回月歷物件 (y年,m+1月)
/*
功能說明: 傳回整個月的日期資料物件
使用方式: OBJ = new calendar(年,零起算月);
OBJ.length 傳回當(dāng)月最大日
OBJ.firstWeek 傳回當(dāng)月一日星期
由 OBJ[日期].屬性名稱 即可取得各項(xiàng)值
OBJ[日期].isToday 傳回是否為今日 true 或 false
其他 OBJ[日期] 屬性參見 calElement() 中的注解
*/
function calendar(y,m) {
var sDObj, lDObj, lY, lM, lD=1, lL, lX=0, tmp1, tmp2, tmp3;
var cY, cM, cD; //年柱,月柱,日柱
var lDPOS = new Array(3);
var n = 0;
var firstLM = 0;
sDObj = new Date(y,m,1,0,0,0,0); //當(dāng)月一日日期
this.length = solarDays(y,m); //國歷當(dāng)月天數(shù)
this.firstWeek = sDObj.getDay(); //國歷當(dāng)月1日星期幾
////////年柱 1900年春分后為庚子年(60進(jìn)制36)
if(m<2) cY=cyclical(y-1900+36-1);
else cY=cyclical(y-1900+36);
var term2=sTerm(y,2); //立春日期
////////月柱 1900年1月小寒以前為 丙子月(60進(jìn)制12)
var firstNode = sTerm(y,m*2) //傳回當(dāng)月「節(jié)」為幾日開始
cM = cyclical((y-1900)*12+m+12);
//當(dāng)月一日與 1900/1/1 相差天數(shù)
//1900/1/1與 1970/1/1 相差25567日, 1900/1/1 日柱為甲戌日(60進(jìn)制10)
var dayCyclical = Date.UTC(y,m,1,0,0,0,0)/86400000+25567+10;
for(var i=0;i<this.length;i++) {
if(lD>lX) {
sDObj = new Date(y,m,i+1); //當(dāng)月一日日期
lDObj = new Lunar(sDObj); //農(nóng)歷
lY = lDObj.year; //農(nóng)歷年
lM = lDObj.month; //農(nóng)歷月
lD = lDObj.day; //農(nóng)歷日
lL = lDObj.isLeap; //農(nóng)歷是否閏月
lX = lL? leapDays(lY): monthDays(lY,lM); //農(nóng)歷當(dāng)月最后一天
if(n==0) firstLM = lM;
lDPOS[n++] = i-lD+1;
}
//依節(jié)氣調(diào)整二月分的年柱, 以春分為界
if(m==1 && (i+1)==term2) cY=cyclical(y-1900+36);
//依節(jié)氣月柱, 以「節(jié)」為界
if((i+1)==firstNode) cM = cyclical((y-1900)*12+m+13);
//日柱
cD = cyclical(dayCyclical+i);
this[i] = new calElement(y, m+1, i+1, nStr1[(i+this.firstWeek)%7],
lY, lM, lD++, lL,
cY ,cM, cD );
}
//節(jié)氣
tmp1=sTerm(y,m*2)-1;
tmp2=sTerm(y,m*2+1)-1;
this[tmp1].solarTerms = solarTerm[m*2];
this[tmp2].solarTerms = solarTerm[m*2+1];
//if(m==3) this[tmp1].color = 'red'; //清明顏色
//國歷節(jié)日
for(i in sFtv)
if(sFtv[i].match(/^(\d{2})(\d{2})([\s\*])(.+)$/))
if(Number(RegExp.$1)==(m+1)) {
this[Number(RegExp.$2)-1].solarFestival1 += RegExp.$4;
//if(RegExp.$3=='*') this[Number(RegExp.$2)-1].color = 'red';
}
//月周節(jié)日
for(i in wFtv)
if(wFtv[i].match(/^(\d{2})(\d)(\d)([\s\*])(.+)$/))
if(Number(RegExp.$1)==(m+1)) {
tmp1=Number(RegExp.$2);
tmp2=Number(RegExp.$3);
if(tmp1<5)
this[((this.firstWeek>tmp2)?7:0) + 7*(tmp1-1) + tmp2 - this.firstWeek].solarFestival2 += RegExp.$5;
else {
tmp1 -= 5;
tmp3 = (this.firstWeek+this.length-1)%7; //當(dāng)月最后一天星期?
this[this.length - tmp3 - 7*tmp1 + tmp2 - (tmp2>tmp3?7:0) - 1 ].solarFestival2 += RegExp.$5;
}
}
//農(nóng)歷節(jié)日
for(i in lFtv)
if(lFtv[i].match(/^(\d{2})(.{2})([\s\*])(.+)$/)) {
tmp1=Number(RegExp.$1)-firstLM;
if(tmp1==-11) tmp1=1;
if(tmp1 >=0 && tmp1<n) {
tmp2 = lDPOS[tmp1] + Number(RegExp.$2) -1;
if( tmp2 >= 0 && tmp2<this.length && this[tmp2].isLeap!=true) {
this[tmp2].lunarFestival += RegExp.$4;
//if(RegExp.$3=='*') this[tmp2].color = 'red';
}
}
}
//復(fù)活節(jié)只出現(xiàn)在3或4月
if(m==2 || m==3) {
var estDay = new easter(y);
if(m == estDay.m)
this[estDay.d-1].solarFestival3 = this[estDay.d-1].solarFestival3+'復(fù)活節(jié)';// Easter Sunday';
}
}
//======================================= 傳回該年的復(fù)活節(jié)(春分后第一次滿月周后的第一主日)
function easter(y) {
var term2=sTerm(y,5); //取得春分日期
var dayTerm2 = new Date(Date.UTC(y,2,term2,0,0,0,0)); //取得春分的國歷日期物件(春分一定出現(xiàn)在3月)
var lDayTerm2 = new Lunar(dayTerm2); //取得取得春分農(nóng)歷
if(lDayTerm2.day<15) //取得下個月圓的相差天數(shù)
var lMlen= 15-lDayTerm2.day;
else
var lMlen= (lDayTerm2.isLeap? leapDays(y): monthDays(y,lDayTerm2.month)) - lDayTerm2.day + 15;
//一天等于 1000*60*60*24 = 86400000 毫秒
var l15 = new Date(dayTerm2.getTime() + 86400000*lMlen ); //求出第一次月圓為國歷幾日
var dayEaster = new Date(l15.getTime() + 86400000*( 7-l15.getUTCDay() ) ); //求出下個周日
this.m = dayEaster.getUTCMonth();
this.d = dayEaster.getUTCDate();
}
///////////////////////////////////////////////////////////////////////////////
var cld;
function drawCld(SY,SM,sD) {
var s1,s2,s3,s4,s5,lObj='',yDisplay;
cld = new calendar(SY,SM);
//顯示農(nóng)歷年、屬相
yDisplay=LunarDate(SY,SM,sD);
//yDisplay = cyclical(SY-1900+36) + '年 '+ Animals[(SY-4)%12] + ' ';
sD--;
if(sD>-1 && sD<cld.length) { //日期內(nèi)
s1 = cld[sD].lunarFestival;
if(s1.length>0) //農(nóng)歷節(jié)日
lObj += ' ' + s1.fontcolor('#FF3BEF');
s2 = cld[sD].solarFestival1;
if( s2.length>0 && (s1.length + s2.length) <= 8) //國歷節(jié)日1
lObj += ' ' + s2.fontcolor('#8FB4FF');
s3 = cld[sD].solarFestival2;
if( s3.length>0 && (s1.length + s2.length + s3.length) <= 8) //國歷節(jié)日2
lObj += ' ' + s3.fontcolor('#8FB4FF');
s4 = cld[sD].solarFestival3;
if( s4.length>0 && (s1.length + s2.length + s3.length + s4.length) <= 8) //國歷節(jié)日3
lObj += ' ' + s4.fontcolor('#8FB4FF');
s5 = cld[sD].solarTerms;
if( s5.length>0 && (s1.length + s2.length + s3.length + s4.length + s5.length) <= 8 ) //廿四節(jié)氣
lObj += ' ' + s5.fontcolor('limegreen');
}
else //非日期
lObj = '';
document.write( yDisplay + lObj );
}
var Today = new Date();
var tY = Today.getFullYear();
var tM = Today.getMonth();
var tD = Today.getDate();
drawCld(tY,tM,tD); //可傳入任意日期，如2007.6.24為 drawCld(2007,5,24);
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