Initial dev repository

[kcls-web.git] / opac / common / js / Date.W3CDTF.js

diff --git a/opac/common/js/Date.W3CDTF.js b/opac/common/js/Date.W3CDTF.js
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+// Date/W3CDTF.js -- W3C Date and Time Formats
+
+Date.W3CDTF = function ( dtf ) {
+    var dd = new Date();
+    dd.setW3CDTF = Date.W3CDTF.prototype.setW3CDTF;
+    dd.getW3CDTF = Date.W3CDTF.prototype.getW3CDTF;
+    if ( dtf ) this.setW3CDTF( dtf );
+    return dd;
+};
+
+Date.W3CDTF.VERSION = "0.03";
+
+Date.W3CDTF.prototype.setW3CDTF = function( dtf ) {
+    var sp = dtf.split( /[^0-9]/ );
+
+    // invalid format
+    if ( sp.length < 6 || sp.length > 8 ) return;
+
+    // invalid time zone
+    if ( sp.length == 7 ) {
+        if ( dtf.charAt( dtf.length-1 ) != "Z" ) return;
+    }
+
+    // to numeric
+    for( var i=0; i<sp.length; i++ ) sp[i] = sp[i]-0;
+
+    // invalid range
+    if ( sp[0] < 1970 ||                // year
+         sp[1] < 1 || sp[1] > 12 ||     // month
+         sp[2] < 1 || sp[2] > 31 ||     // day
+         sp[3] < 0 || sp[3] > 23 ||     // hour
+         sp[4] < 0 || sp[4] > 59 ||     // min
+         sp[5] < 0 || sp[5] > 60 ) {    // sec
+        return;                         // invalid date 
+    }
+
+    // get UTC milli-second
+
+    var msec = Date.UTC( sp[0], sp[1]-1, sp[2], sp[3], sp[4], sp[5] );
+
+    // time zene offset
+    if ( sp.length == 8 ) {
+        if ( dtf.indexOf("+") < 0 ) sp[6] *= -1;
+        if ( sp[6] < -12 || sp[6] > 13 ) return;    // time zone offset hour
+        if ( sp[7] < 0 || sp[7] > 59 ) return;      // time zone offset min
+        msec -= (sp[6]*60+sp[7]) * 60000;
+    }
+
+    // set by milli-second;
+    return this.setTime( msec );
+};
+
+Date.W3CDTF.prototype.getW3CDTF = function() {
+    var year = this.getFullYear();
+    var mon  = this.getMonth()+1;
+    var day  = this.getDate();
+    var hour = this.getHours();
+    var min  = this.getMinutes();
+    var sec  = this.getSeconds();
+
+    // time zone
+    var tzos = this.getTimezoneOffset();
+    var tzpm = ( tzos > 0 ) ? "-" : "+";
+    if ( tzos < 0 ) tzos *= -1;
+    var tzhour = tzos / 60;
+    var tzmin  = tzos % 60;
+
+    // sprintf( "%02d", ... )
+    if ( mon  < 10 ) mon  = "0"+mon;
+    if ( day  < 10 ) day  = "0"+day;
+    if ( hour < 10 ) hour = "0"+hour;
+    if ( min  < 10 ) min  = "0"+min;
+    if ( sec  < 10 ) sec  = "0"+sec;
+    if ( tzhour < 10 ) tzhour = "0"+tzhour;
+    if ( tzmin  < 10 ) tzmin  = "0"+tzmin;
+    var dtf = year+"-"+mon+"-"+day+"T"+hour+":"+min+":"+sec+tzpm+tzhour+":"+tzmin;
+    return dtf;
+};
+
+/*
+
+=head1 NAME
+
+Date.W3CDTF - W3C Date and Time Formats
+
+=head1 SYNOPSIS
+
+    var dd = new Date.W3CDTF();         // now
+    document.write( "getW3CDTF: "+ dd.getW3CDTF() +"\n" );
+
+    dd.setW3CDTF( "2005-04-23T17:20:00+09:00" );
+    document.write( "toLocaleString: "+ dd.toLocaleString() +"\n" );
+
+=head1 DESCRIPTION
+
+This module understands the W3CDTF date/time format, an ISO 8601 profile, 
+defined by W3C. This format as the native date format of RSS 1.0.
+It can be used to parse these formats in order to create the appropriate objects.
+
+=head1 METHODS
+
+=head2 new()
+
+This constructor method creates a new Date object which has 
+following methods in addition to Date's all native methods.
+
+=head2 setW3CDTF( "2006-02-15T19:40:00Z" )
+
+This method parse a W3CDTF datetime string and sets it.
+
+=head2 getW3CDTF()
+
+This method returns a W3CDTF datetime string.
+Its timezone is always local timezone configured on OS.
+
+=head1 SEE ALSO
+
+http://www.w3.org/TR/NOTE-datetime
+
+=head1 AUTHOR
+
+Yusuke Kawasaki http://www.kawa.net/
+
+=head1 COPYRIGHT AND LICENSE
+
+Copyright (c) 2005-2006 Yusuke Kawasaki. All rights reserved.
+This program is free software; you can redistribute it and/or 
+modify it under the Artistic license. Or whatever license I choose,
+which I will do instead of keeping this documentation like it is.
+
+=cut
+*/