[Sommaire] [Imprimer]

   1  // ===================================================================

   2  // Author: Matt Kruse <matt@mattkruse.com>

   3  // WWW: http://www.mattkruse.com/

   4  //

   5  // NOTICE: You may use this code for any purpose, commercial or

   6  // private, without any further permission from the author. You may

   7  // remove this notice from your final code if you wish, however it is

   8  // appreciated by the author if at least my web site address is kept.

   9  //

  10  // You may *NOT* re-distribute this code in any way except through its

  11  // use. That means, you can include it in your product, or your web

  12  // site, or any other form where the code is actually being used. You

  13  // may not put the plain javascript up on your site for download or

  14  // include it in your javascript libraries for download.

  15  // If you wish to share this code with others, please just point them

  16  // to the URL instead.

  17  // Please DO NOT link directly to my .js files from your site. Copy

  18  // the files to your server and use them there. Thank you.

  19  // ===================================================================

  20  
  21  // HISTORY

  22  // ------------------------------------------------------------------

  23  // Feb 25, 2007: Added support for "S" (ordinal day number) (blueyed)

  24  // Sep 26, 2006: Handle escaped chars in format string, e.g. "\d" as

  25  //               literal "d" (blueyed)

  26  // May 17, 2003: Fixed bug in parseDate() for dates <1970

  27  // March 11, 2003: Added parseDate() function

  28  // March 11, 2003: Added "NNN" formatting option. Doesn't match up

  29  //                 perfectly with SimpleDateFormat formats, but

  30  //                 backwards-compatability was required.

  31  
  32  // ------------------------------------------------------------------

  33  // These functions use the same 'format' strings as the

  34  // java.text.SimpleDateFormat class, with minor exceptions.

  35  // The format string consists of the following abbreviations:

  36  //

  37  // Field        | Full Form          | Short Form

  38  // -------------+--------------------+-----------------------

  39  // Year         | yyyy (4 digits)    | yy (2 digits), y (2 or 4 digits)

  40  // Month        | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)

  41  //              | NNN (abbr.)        |

  42  // Day of Month | dd (2 digits)      | d (1 or 2 digits)

  43  // Day of Week  | EE (name)          | E (abbr)

  44  // Hour (1-12)  | hh (2 digits)      | h (1 or 2 digits)

  45  // Hour (0-23)  | HH (2 digits)      | H (1 or 2 digits)

  46  // Hour (0-11)  | KK (2 digits)      | K (1 or 2 digits)

  47  // Hour (1-24)  | kk (2 digits)      | k (1 or 2 digits)

  48  // Minute       | mm (2 digits)      | m (1 or 2 digits)

  49  // Second       | ss (2 digits)      | s (1 or 2 digits)

  50  // AM/PM        | a                  |

  51  // day suffix   |                    |

  52  // (st|nd|rd|th)| S                  |

  53  //

  54  // NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!

  55  // Examples:

  56  //  "MMM d, y" matches: January 01, 2000

  57  //                      Dec 1, 1900

  58  //                      Nov 20, 00

  59  //  "M/d/yy"   matches: 01/20/00

  60  //                      9/2/00

  61  //  "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"

  62  // ------------------------------------------------------------------

  63  
  64  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');
  65  var DAY_NAMES=new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
  66  function LZ(x) {return(x<0||x>9?"":"0")+x}
  67  
  68  // ------------------------------------------------------------------

  69  // isDate ( date_string, format_string )

  70  // Returns true if date string matches format of format string and

  71  // is a valid date. Else returns false.

  72  // It is recommended that you trim whitespace around the value before

  73  // passing it to this function, as whitespace is NOT ignored!

  74  // ------------------------------------------------------------------

  75  function isDate(val,format) {
  76      var date=getDateFromFormat(val,format);
  77      if (date==0) { return false; }
  78      return true;
  79      }
  80  
  81  // -------------------------------------------------------------------

  82  // compareDates(date1,date1format,date2,date2format)

  83  //   Compare two date strings to see which is greater.

  84  //   Returns:

  85  //   1 if date1 is greater than date2

  86  //   0 if date2 is greater than date1 of if they are the same

  87  //  -1 if either of the dates is in an invalid format

  88  // -------------------------------------------------------------------

  89  function compareDates(date1,dateformat1,date2,dateformat2) {
  90      var d1=getDateFromFormat(date1,dateformat1);
  91      var d2=getDateFromFormat(date2,dateformat2);
  92      if (d1==0 || d2==0) {
  93          return -1;
  94          }
  95      else if (d1 > d2) {
  96          return 1;
  97          }
  98      return 0;
  99      }
 100  
 101  // ------------------------------------------------------------------

 102  // formatDate (date_object, format)

 103  // Returns a date in the output format specified.

 104  // The format string uses the same abbreviations as in getDateFromFormat()

 105  // ------------------------------------------------------------------

 106  function formatDate(date,format) {
 107      format=format+"";
 108      var result="";
 109      var i_format=0;
 110      var c="";
 111      var token="";
 112      var y=date.getYear()+"";
 113      var M=date.getMonth()+1;
 114      var d=date.getDate();
 115      var E=date.getDay();
 116      var H=date.getHours();
 117      var m=date.getMinutes();
 118      var s=date.getSeconds();
 119      var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
 120      // Convert real date parts into formatted versions

 121      var value=new Object();
 122      if (y.length < 4) {y=""+(y-0+1900);}
 123      value["y"]=""+y;
 124      value["yyyy"]=y;
 125      value["yy"]=y.substring(2,4);
 126      value["M"]=M;
 127      value["MM"]=LZ(M);
 128      value["MMM"]=MONTH_NAMES[M-1];
 129      value["NNN"]=MONTH_NAMES[M+11];
 130      value["d"]=d;
 131      value["dd"]=LZ(d);
 132      value["E"]=DAY_NAMES[E+7];
 133      value["EE"]=DAY_NAMES[E];
 134      value["H"]=H;
 135      value["HH"]=LZ(H);
 136      if (H==0){value["h"]=12;}
 137      else if (H>12){value["h"]=H-12;}
 138      else {value["h"]=H;}
 139      value["hh"]=LZ(value["h"]);
 140      if (H>11){value["K"]=H-12;} else {value["K"]=H;}
 141      value["k"]=H+1;
 142      value["KK"]=LZ(value["K"]);
 143      value["kk"]=LZ(value["k"]);
 144      if (H > 11) { value["a"]="PM"; }
 145      else { value["a"]="AM"; }
 146      value["m"]=m;
 147      value["mm"]=LZ(m);
 148      value["s"]=s;
 149      value["ss"]=LZ(s);
 150  
 151      // english ordinal numbers (see http://en.wikipedia.org/wiki/Names_of_numbers_in_English#Ordinal_numbers):

 152      if( d < 20 && d > 9 )
 153      {
 154          value["S"] = "th";
 155      }
 156      else switch( d % 10 )
 157      {
 158          case 1: value["S"] = "st"; break;
 159          case 2: value["S"] = "nd"; break;
 160          case 3: value["S"] = "rd"; break;
 161          default: value["S"] = "th"; break;
 162      }
 163  
 164      while (i_format < format.length) {
 165          c=format.charAt(i_format);
 166          if( c == "\\" )
 167          { // Use escaped char as-is:
 168              i_format++;
 169              if( i_format < format.length ) {
 170                  result=result + format.charAt(i_format);
 171                  i_format++;
 172              }
 173              continue;
 174          }
 175          token="";
 176          while ((format.charAt(i_format)==c) && (i_format < format.length)) {
 177              token += format.charAt(i_format++);
 178              }
 179          if (value[token] != null) { result=result + value[token]; }
 180          else { result=result + token; }
 181          }
 182      return result;
 183      }
 184  
 185  // ------------------------------------------------------------------

 186  // Utility functions for parsing in getDateFromFormat()

 187  // ------------------------------------------------------------------

 188  function _isInteger(val) {
 189      var digits="1234567890";
 190      for (var i=0; i < val.length; i++) {
 191          if (digits.indexOf(val.charAt(i))==-1) { return false; }
 192          }
 193      return true;
 194      }
 195  function _getInt(str,i,minlength,maxlength) {
 196      for (var x=maxlength; x>=minlength; x--) {
 197          var token=str.substring(i,i+x);
 198          if (token.length < minlength) { return null; }
 199          if (_isInteger(token)) { return token; }
 200          }
 201      return null;
 202      }
 203  
 204  // ------------------------------------------------------------------

 205  // getDateFromFormat( date_string , format_string )

 206  //

 207  // This function takes a date string and a format string. It matches

 208  // If the date string matches the format string, it returns the

 209  // getTime() of the date. If it does not match, it returns 0.

 210  // ------------------------------------------------------------------

 211  function getDateFromFormat(val,format) {
 212      val=val+"";
 213      format=format+"";
 214      var i_val=0;
 215      var i_format=0;
 216      var c="";
 217      var token="";
 218      var token2="";
 219      var x,y;
 220      var now=new Date();
 221      var year=now.getYear();
 222      var month=now.getMonth()+1;
 223      var date=1;
 224      var hh=now.getHours();
 225      var mm=now.getMinutes();
 226      var ss=now.getSeconds();
 227      var ampm="";
 228  
 229      while (i_format < format.length) {
 230          // Get next token from format string

 231          c=format.charAt(i_format);
 232  
 233          if( c == "\\" )
 234          { // Consume escaped char:
 235              i_format++;
 236              if( i_format < format.length ) {
 237                  if( format.charAt(i_format) != val.charAt(i_val) )
 238                  { // Escaped char not found:
 239                      return 0;
 240                  }
 241                  i_format++;
 242              }
 243              i_val++;
 244              continue;
 245          }
 246  
 247          token="";
 248          while ((format.charAt(i_format)==c) && (i_format < format.length)) {
 249              token += format.charAt(i_format++);
 250              }
 251          // Extract contents of value based on format token

 252          if (token=="yyyy" || token=="yy" || token=="y") {
 253              if (token=="yyyy") { x=4;y=4; }
 254              if (token=="yy")   { x=2;y=2; }
 255              if (token=="y")    { x=2;y=4; }
 256              year=_getInt(val,i_val,x,y);
 257              if (year==null) { return 0; }
 258              i_val += year.length;
 259              if (year.length==2) {
 260                  if (year > 70) { year=1900+(year-0); }
 261                  else { year=2000+(year-0); }
 262                  }
 263              }
 264          else if (token=="MMM"||token=="NNN"){
 265              month=0;
 266              for (var i=0; i<MONTH_NAMES.length; i++) {
 267                  var month_name=MONTH_NAMES[i];
 268                  if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
 269                      if (token=="MMM"||(token=="NNN"&&i>11)) {
 270                          month=i+1;
 271                          if (month>12) { month -= 12; }
 272                          i_val += month_name.length;
 273                          break;
 274                          }
 275                      }
 276                  }
 277              if ((month < 1)||(month>12)){return 0;}
 278              }
 279          else if (token=="EE"||token=="E"){
 280              for (var i=0; i<DAY_NAMES.length; i++) {
 281                  var day_name=DAY_NAMES[i];
 282                  if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
 283                      i_val += day_name.length;
 284                      break;
 285                      }
 286                  }
 287              }
 288          else if (token=="MM"||token=="M") {
 289              month=_getInt(val,i_val,token.length,2);
 290              if(month==null||(month<1)||(month>12)){return 0;}
 291              i_val+=month.length;}
 292          else if (token=="dd"||token=="d") {
 293              date=_getInt(val,i_val,token.length,2);
 294              if(date==null||(date<1)||(date>31)){return 0;}
 295              i_val+=date.length;}
 296          else if (token=="hh"||token=="h") {
 297              hh=_getInt(val,i_val,token.length,2);
 298              if(hh==null||(hh<1)||(hh>12)){return 0;}
 299              i_val+=hh.length;}
 300          else if (token=="HH"||token=="H") {
 301              hh=_getInt(val,i_val,token.length,2);
 302              if(hh==null||(hh<0)||(hh>23)){return 0;}
 303              i_val+=hh.length;}
 304          else if (token=="KK"||token=="K") {
 305              hh=_getInt(val,i_val,token.length,2);
 306              if(hh==null||(hh<0)||(hh>11)){return 0;}
 307              i_val+=hh.length;}
 308          else if (token=="kk"||token=="k") {
 309              hh=_getInt(val,i_val,token.length,2);
 310              if(hh==null||(hh<1)||(hh>24)){return 0;}
 311              i_val+=hh.length;hh--;}
 312          else if (token=="mm"||token=="m") {
 313              mm=_getInt(val,i_val,token.length,2);
 314              if(mm==null||(mm<0)||(mm>59)){return 0;}
 315              i_val+=mm.length;}
 316          else if (token=="ss"||token=="s") {
 317              ss=_getInt(val,i_val,token.length,2);
 318              if(ss==null||(ss<0)||(ss>59)){return 0;}
 319              i_val+=ss.length;}
 320          else if (token=="a") {
 321              if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
 322              else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
 323              else {return 0;}
 324              i_val+=2;}
 325          else {
 326              if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
 327              else {i_val+=token.length;}
 328              }
 329          }
 330      // If there are any trailing characters left in the value, it doesn't match

 331      if (i_val != val.length) { return 0; }
 332      // Is date valid for month?

 333      if (month==2) {
 334          // Check for leap year

 335          if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
 336              if (date > 29){ return 0; }
 337              }
 338          else { if (date > 28) { return 0; } }
 339          }
 340      if ((month==4)||(month==6)||(month==9)||(month==11)) {
 341          if (date > 30) { return 0; }
 342          }
 343      // Correct hours value

 344      if (hh<12 && ampm=="PM") { hh=hh-0+12; }
 345      else if (hh>11 && ampm=="AM") { hh-=12; }
 346      var newdate=new Date(year,month-1,date,hh,mm,ss);
 347      return newdate.getTime();
 348      }
 349  
 350  // ------------------------------------------------------------------

 351  // parseDate( date_string [, prefer_euro_format] )

 352  //

 353  // This function takes a date string and tries to match it to a

 354  // number of possible date formats to get the value. It will try to

 355  // match against the following international formats, in this order:

 356  // y-M-d   MMM d, y   MMM d,y   y-MMM-d   d-MMM-y  MMM d

 357  // M/d/y   M-d-y      M.d.y     MMM-d     M/d      M-d

 358  // d/M/y   d-M-y      d.M.y     d-MMM     d/M      d-M

 359  // A second argument may be passed to instruct the method to search

 360  // for formats like d/M/y (european format) before M/d/y (American).

 361  // Returns a Date object or null if no patterns match.

 362  // ------------------------------------------------------------------

 363  function parseDate(val) {
 364      var preferEuro=(arguments.length==2)?arguments[1]:false;
 365      generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
 366      monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
 367      dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
 368      var checkList=new Array('generalFormats',preferEuro?'dateFirst':'monthFirst',preferEuro?'monthFirst':'dateFirst');
 369      var d=null;
 370      for (var i=0; i<checkList.length; i++) {
 371          var l=window[checkList[i]];
 372          for (var j=0; j<l.length; j++) {
 373              d=getDateFromFormat(val,l[j]);
 374              if (d!=0) { return new Date(d); }
 375              }
 376          }
 377      return null;
 378      }