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Diffstat (limited to 'libgpl/date/date.js')
| -rw-r--r-- | libgpl/date/date.js | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/libgpl/date/date.js b/libgpl/date/date.js new file mode 100644 index 0000000..984adb5 --- /dev/null +++ b/libgpl/date/date.js @@ -0,0 +1,335 @@ +// ===================================================================
+// Author: Matt Kruse <matt@mattkruse.com>
+// WWW: http://www.mattkruse.com/
+//
+// NOTICE: You may use this code for any purpose, commercial or
+// private, without any further permission from the author. You may
+// remove this notice from your final code if you wish, however it is
+// appreciated by the author if at least my web site address is kept.
+//
+// You may *NOT* re-distribute this code in any way except through its
+// use. That means, you can include it in your product, or your web
+// site, or any other form where the code is actually being used. You
+// may not put the plain javascript up on your site for download or
+// include it in your javascript libraries for download.
+// If you wish to share this code with others, please just point them
+// to the URL instead.
+// Please DO NOT link directly to my .js files from your site. Copy
+// the files to your server and use them there. Thank you.
+// ===================================================================
+
+// HISTORY
+// ------------------------------------------------------------------
+// May 17, 2003: Fixed bug in parseDate() for dates <1970
+// March 11, 2003: Added parseDate() function
+// March 11, 2003: Added "NNN" formatting option. Doesn't match up
+// perfectly with SimpleDateFormat formats, but
+// backwards-compatability was required.
+
+// ------------------------------------------------------------------
+// These functions use the same 'format' strings as the
+// java.text.SimpleDateFormat class, with minor exceptions.
+// The format string consists of the following abbreviations:
+//
+// Field | Full Form | Short Form
+// -------------+--------------------+-----------------------
+// Year | yyyy (4 digits) | yy (2 digits), y (2 or 4 digits)
+// Month | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)
+// | NNN (abbr.) |
+// Day of Month | dd (2 digits) | d (1 or 2 digits)
+// Day of Week | EE (name) | E (abbr)
+// Hour (1-12) | hh (2 digits) | h (1 or 2 digits)
+// Hour (0-23) | HH (2 digits) | H (1 or 2 digits)
+// Hour (0-11) | KK (2 digits) | K (1 or 2 digits)
+// Hour (1-24) | kk (2 digits) | k (1 or 2 digits)
+// Minute | mm (2 digits) | m (1 or 2 digits)
+// Second | ss (2 digits) | s (1 or 2 digits)
+// AM/PM | a |
+//
+// NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!
+// Examples:
+// "MMM d, y" matches: January 01, 2000
+// Dec 1, 1900
+// Nov 20, 00
+// "M/d/yy" matches: 01/20/00
+// 9/2/00
+// "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"
+// ------------------------------------------------------------------
+
+var MONTH_NAMES=new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
+var DAY_NAMES=new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
+function LZ(x) {return(x<0||x>9?"":"0")+x}
+
+// ------------------------------------------------------------------
+// isDate ( date_string, format_string )
+// Returns true if date string matches format of format string and
+// is a valid date. Else returns false.
+// It is recommended that you trim whitespace around the value before
+// passing it to this function, as whitespace is NOT ignored!
+// ------------------------------------------------------------------
+function isDate(val,format) {
+ var date=getDateFromFormat(val,format);
+ if (date==0) { return false; }
+ return true;
+ }
+
+// -------------------------------------------------------------------
+// compareDates(date1,date1format,date2,date2format)
+// Compare two date strings to see which is greater.
+// Returns:
+// 1 if date1 is greater than date2
+// 0 if date2 is greater than date1 of if they are the same
+// -1 if either of the dates is in an invalid format
+// -------------------------------------------------------------------
+function compareDates(date1,dateformat1,date2,dateformat2) {
+ var d1=getDateFromFormat(date1,dateformat1);
+ var d2=getDateFromFormat(date2,dateformat2);
+ if (d1==0 || d2==0) {
+ return -1;
+ }
+ else if (d1 > d2) {
+ return 1;
+ }
+ return 0;
+ }
+
+// ------------------------------------------------------------------
+// formatDate (date_object, format)
+// Returns a date in the output format specified.
+// The format string uses the same abbreviations as in getDateFromFormat()
+// ------------------------------------------------------------------
+function formatDate(date,format) {
+ format=format+"";
+ var result="";
+ var i_format=0;
+ var c="";
+ var token="";
+ var y=date.getYear()+"";
+ var M=date.getMonth()+1;
+ var d=date.getDate();
+ var E=date.getDay();
+ var H=date.getHours();
+ var m=date.getMinutes();
+ var s=date.getSeconds();
+ var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
+ // Convert real date parts into formatted versions
+ var value=new Object();
+ if (y.length < 4) {y=""+(y-0+1900);}
+ value["y"]=""+y;
+ value["yyyy"]=y;
+ value["yy"]=y.substring(2,4);
+ value["M"]=M;
+ value["MM"]=LZ(M);
+ value["MMM"]=MONTH_NAMES[M-1];
+ value["NNN"]=MONTH_NAMES[M+11];
+ value["d"]=d;
+ value["dd"]=LZ(d);
+ value["E"]=DAY_NAMES[E+7];
+ value["EE"]=DAY_NAMES[E];
+ value["H"]=H;
+ value["HH"]=LZ(H);
+ if (H==0){value["h"]=12;}
+ else if (H>12){value["h"]=H-12;}
+ else {value["h"]=H;}
+ value["hh"]=LZ(value["h"]);
+ if (H>11){value["K"]=H-12;} else {value["K"]=H;}
+ value["k"]=H+1;
+ value["KK"]=LZ(value["K"]);
+ value["kk"]=LZ(value["k"]);
+ if (H > 11) { value["a"]="PM"; }
+ else { value["a"]="AM"; }
+ value["m"]=m;
+ value["mm"]=LZ(m);
+ value["s"]=s;
+ value["ss"]=LZ(s);
+ while (i_format < format.length) {
+ c=format.charAt(i_format);
+ token="";
+ while ((format.charAt(i_format)==c) && (i_format < format.length)) {
+ token += format.charAt(i_format++);
+ }
+ if (value[token] != null) { result=result + value[token]; }
+ else { result=result + token; }
+ }
+ return result;
+ }
+
+// ------------------------------------------------------------------
+// Utility functions for parsing in getDateFromFormat()
+// ------------------------------------------------------------------
+function _isInteger(val) {
+ var digits="1234567890";
+ for (var i=0; i < val.length; i++) {
+ if (digits.indexOf(val.charAt(i))==-1) { return false; }
+ }
+ return true;
+ }
+function _getInt(str,i,minlength,maxlength) {
+ for (var x=maxlength; x>=minlength; x--) {
+ var token=str.substring(i,i+x);
+ if (token.length < minlength) { return null; }
+ if (_isInteger(token)) { return token; }
+ }
+ return null;
+ }
+
+// ------------------------------------------------------------------
+// getDateFromFormat( date_string , format_string )
+//
+// This function takes a date string and a format string. It matches
+// If the date string matches the format string, it returns the
+// getTime() of the date. If it does not match, it returns 0.
+// ------------------------------------------------------------------
+function getDateFromFormat(val,format) {
+ val=val+"";
+ format=format+"";
+ var i_val=0;
+ var i_format=0;
+ var c="";
+ var token="";
+ var token2="";
+ var x,y;
+ var now=new Date();
+ var year=now.getYear();
+ var month=now.getMonth()+1;
+ var date=1;
+ var hh=now.getHours();
+ var mm=now.getMinutes();
+ var ss=now.getSeconds();
+ var ampm="";
+
+ while (i_format < format.length) {
+ // Get next token from format string
+ c=format.charAt(i_format);
+ token="";
+ while ((format.charAt(i_format)==c) && (i_format < format.length)) {
+ token += format.charAt(i_format++);
+ }
+ // Extract contents of value based on format token
+ if (token=="yyyy" || token=="yy" || token=="y") {
+ if (token=="yyyy") { x=4;y=4; }
+ if (token=="yy") { x=2;y=2; }
+ if (token=="y") { x=2;y=4; }
+ year=_getInt(val,i_val,x,y);
+ if (year==null) { return 0; }
+ i_val += year.length;
+ if (year.length==2) {
+ if (year > 70) { year=1900+(year-0); }
+ else { year=2000+(year-0); }
+ }
+ }
+ else if (token=="MMM"||token=="NNN"){
+ month=0;
+ for (var i=0; i<MONTH_NAMES.length; i++) {
+ var month_name=MONTH_NAMES[i];
+ if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
+ if (token=="MMM"||(token=="NNN"&&i>11)) {
+ month=i+1;
+ if (month>12) { month -= 12; }
+ i_val += month_name.length;
+ break;
+ }
+ }
+ }
+ if ((month < 1)||(month>12)){return 0;}
+ }
+ else if (token=="EE"||token=="E"){
+ for (var i=0; i<DAY_NAMES.length; i++) {
+ var day_name=DAY_NAMES[i];
+ if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
+ i_val += day_name.length;
+ break;
+ }
+ }
+ }
+ else if (token=="MM"||token=="M") {
+ month=_getInt(val,i_val,token.length,2);
+ if(month==null||(month<1)||(month>12)){return 0;}
+ i_val+=month.length;}
+ else if (token=="dd"||token=="d") {
+ date=_getInt(val,i_val,token.length,2);
+ if(date==null||(date<1)||(date>31)){return 0;}
+ i_val+=date.length;}
+ else if (token=="hh"||token=="h") {
+ hh=_getInt(val,i_val,token.length,2);
+ if(hh==null||(hh<1)||(hh>12)){return 0;}
+ i_val+=hh.length;}
+ else if (token=="HH"||token=="H") {
+ hh=_getInt(val,i_val,token.length,2);
+ if(hh==null||(hh<0)||(hh>23)){return 0;}
+ i_val+=hh.length;}
+ else if (token=="KK"||token=="K") {
+ hh=_getInt(val,i_val,token.length,2);
+ if(hh==null||(hh<0)||(hh>11)){return 0;}
+ i_val+=hh.length;}
+ else if (token=="kk"||token=="k") {
+ hh=_getInt(val,i_val,token.length,2);
+ if(hh==null||(hh<1)||(hh>24)){return 0;}
+ i_val+=hh.length;hh--;}
+ else if (token=="mm"||token=="m") {
+ mm=_getInt(val,i_val,token.length,2);
+ if(mm==null||(mm<0)||(mm>59)){return 0;}
+ i_val+=mm.length;}
+ else if (token=="ss"||token=="s") {
+ ss=_getInt(val,i_val,token.length,2);
+ if(ss==null||(ss<0)||(ss>59)){return 0;}
+ i_val+=ss.length;}
+ else if (token=="a") {
+ if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
+ else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
+ else {return 0;}
+ i_val+=2;}
+ else {
+ if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
+ else {i_val+=token.length;}
+ }
+ }
+ // If there are any trailing characters left in the value, it doesn't match
+ if (i_val != val.length) { return 0; }
+ // Is date valid for month?
+ if (month==2) {
+ // Check for leap year
+ if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
+ if (date > 29){ return 0; }
+ }
+ else { if (date > 28) { return 0; } }
+ }
+ if ((month==4)||(month==6)||(month==9)||(month==11)) {
+ if (date > 30) { return 0; }
+ }
+ // Correct hours value
+ if (hh<12 && ampm=="PM") { hh=hh-0+12; }
+ else if (hh>11 && ampm=="AM") { hh-=12; }
+ var newdate=new Date(year,month-1,date,hh,mm,ss);
+ return newdate.getTime();
+ }
+
+// ------------------------------------------------------------------
+// parseDate( date_string [, prefer_euro_format] )
+//
+// This function takes a date string and tries to match it to a
+// number of possible date formats to get the value. It will try to
+// match against the following international formats, in this order:
+// y-M-d MMM d, y MMM d,y y-MMM-d d-MMM-y MMM d
+// M/d/y M-d-y M.d.y MMM-d M/d M-d
+// d/M/y d-M-y d.M.y d-MMM d/M d-M
+// A second argument may be passed to instruct the method to search
+// for formats like d/M/y (european format) before M/d/y (American).
+// Returns a Date object or null if no patterns match.
+// ------------------------------------------------------------------
+function parseDate(val) {
+ var preferEuro=(arguments.length==2)?arguments[1]:false;
+ generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
+ monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
+ dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
+ var checkList=new Array('generalFormats',preferEuro?'dateFirst':'monthFirst',preferEuro?'monthFirst':'dateFirst');
+ var d=null;
+ for (var i=0; i<checkList.length; i++) {
+ var l=window[checkList[i]];
+ for (var j=0; j<l.length; j++) {
+ d=getDateFromFormat(val,l[j]);
+ if (d!=0) { return new Date(d); }
+ }
+ }
+ return null;
+ }
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