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Demo af følgende javascript funktionalitet

De følgende demo samples viser dig hvordan man opretter en singleton i javascript og hvordan man kan kode en dato formatter og formatere et beløb med det locale der er gældende for dit område

Kildekoden

Copyrigt notice: Du må gerne kopiere denne kildekode, så længe du beholder copyright notice intakt

@package   javascript
@author    http://Finn-Rasmussen.com
@copyright http://Finn-Rasmussen.com
@version   1.10
@since     22-feb-2007

Den fulde kildekode for:

AmountFormat
CountryCode
DateFormat
LanguageCode
Locale
Request

AmountFormat

The full source code for:

AmountFormat.js.php.html

AmountFormat.js.php

   1:<?
   2:/**
   3: * This class simulates a AmountFormat object, in a very primitive matter
   4: *
   5: * class AmountFormat {
   6: *    public static AmountFormat getInstance(); // Use the current Locale
   7: *    public static AmountFormat getInstance(Locale locale);
   8: *    public static String format(String number);
   9: * }
  10: *
  11: * @package javascript
  12: * @author    http://Finn-Rasmussen.com
  13: * @copyright http://Finn-Rasmussen.com
  14: * @version 1.10
  15: * @since 22-feb-2007
  16: */
  17:
  18:/**
  19: * The constructor function simulates a crude AmountFormat object
  20: * The AmountFormat object is instanciated with the singleton pattern
  21: * The Singleton pattern is simulated in JavaScript by:
  22: * - Using an anonymous constructor to create a function object
  23: * - And saving the returned object in an external variable
  24: * <code>
  25: * usage:
  26: *   // Include and instanciate the AmountFormat class as a singleton
  27: *   &lt;script type="text/javascript" src="../page/AmountFormat.js.php"&gt;&lt;/script&gt;
  28: *
  29: *   // Use the AmountFormat singleton class with the default Locale
  30: *   var value = AmountFormat.format('1234567.89'); // value=1,234,567.89
  31: * Or
  32: *   var locale = Locale.getInstance(LanguageCode.DANISH, CountryCode.DK);
  33: *   var amountformat = AmountFormat.getInstance(locale);
  34: *   var formatted    = amountformat.format('1234567,89');
  35: * </code>
  36: */
  37:?>
  38:var AmountFormat = new function() {
  39:    // Consts, do NOT change
  40:    this.PERIOD = '.';
  41:    this.COMMA  = ',';
  42:    
  43:    // local vars to customize to your locale: I.e. 1,234,567.89
  44:    this.locale = Locale.getInstance();
  45:<?
  46:    /**
  47:     * Get the instance of the current AmountFormat object 
  48:     * @param  Locale locale The Locale object
  49:     * @return AmountFormat  The current default AmountFormat object
  50:     */
  51:?>
  52:    this.getInstance = function(locale) {
  53:        if (typeof locale !== 'undefined') {
  54:            this.locale = locale;
  55:        } else {
  56:            alert(typeof locale);
  57:        }
  58:        return this;
  59:    }
  60:<?    
  61:    /**
  62:     * Format the amount with decimal point and thousand seperator
  63:     * This is the entry methode you must use
  64:     * usage:
  65:     *   var value = AmountFormat.format('1234567.89'); // value=1,234,567.89
  66:     * </code>
  67:     * @public
  68:     * @param  String amount The number to format
  69:     * @return String The number formatted like 1.234.567,89
  70:     */
  71:?>
  72:    this.format = function(number) {
  73:       var n = this.parse(number);
  74:       var i = parseFloat(n);
  75:       var s = this.parseString(i); 
  76:       var sign = i<0?'-':'';
  77:       return sign + this.addThousandSeperators(s);
  78:    }
  79:<?
  80:   // THE following methods are private helpers
  81:   
  82:    /**
  83:     * Parse the amount into a string of digits and decimals seperated by a period
  84:     * All the thousand seperators and the comma decimal point seperators are removed
  85:     * @private
  86:     * @param  String number The number to parse
  87:     * @return String The number parsed into: digits+'.'+decimals
  88:     */
  89:?>
  90:    this.parse = function(number) {
  91:        var decimals = '';
  92:        var prefix   = '';
  93:        var d = number.split(this.locale.getDecimalPoint());
  94:        switch (d.length) {
  95:            case 2:
  96:                decimals = d[1];
  97:            case 1:
  98:                prefix = d[0];
  99:                break;
 100:            default:
 101:                alert('Wrong DECIMAL_POINT, Expected=digits'+this.locale.getDecimalPoint()+'decimals found='+number);
 102:                break;
 103:        }
 104:        // Strip off any thousand seperators and return a real javascript number like: 1234567.89
 105:        var digits = this.stripOfThousandSeperators(prefix);
 106:        s = digits + this.PERIOD + decimals;
 107:        return s;
 108:    }
 109:<?
 110:    /**
 111:     * Parse the amount into a string of digits and decimals seperated by a period
 112:     * All the thousand seperators and the comma decimal point seperators are removed
 113:     * @private
 114:     * @param  String number The number to parse
 115:     * @return String The number parsed into: digits+'.'+decimals
 116:     */
 117:?>
 118:    this.parseString = function(number) {
 119:       var n = number;
 120:       if (isNaN(n) ) {
 121:           alert('Wrong format, Expected=digits'+this.locale.getDecimalPoint()+'decimals, found='+number);
 122:           n = 0.00;
 123:       }
 124:       i = Math.abs(n);
 125:       i = parseInt((i + .005) * 100, 10);
 126:       i = i / 100;
 127:       s = new String(i);
 128:       if (s.indexOf(this.PERIOD) < 0) {
 129:           s += this.PERIOD+'00';
 130:       }
 131:       if (s.indexOf(this.PERIOD) == (s.length - 2)) {
 132:           s += '0';
 133:       }
 134:       return s;
 135:    }
 136:<?
 137:    /**
 138:     * Strip off any thousand seperators
 139:     * @private
 140:     * @param  String number The number to strip of the thousand seperators
 141:     * @return String The number with out any thousand seperators
 142:     */
 143:?>
 144:    this.stripOfThousandSeperators = function(number) {
 145:        var digits = '';
 146:        var t = number.split(this.locale.getThousandSeperator());
 147:        for (var i=0; i < t.length; i++) {
 148:            digits += t[i];
 149:        }
 150:        return digits;
 151:    }
 152:<?
 153:    /**
 154:     * Update the decimal point, Add the thousand seperators, if defined
 155:     * @private
 156:     * @param  String number The number to update
 157:     * @return String The updated number
 158:     */
 159:?>
 160:    this.addThousandSeperators = function(number) {
 161:       var s = number.replace(RegExp('[\\'+this.PERIOD+']',"g"),this.locale.getDecimalPoint());
 162:       var decimals = s.split(this.locale.getDecimalPoint());
 163:       var t = '';
 164:       if (this.locale.getThousandSeperator() !== '') {
 165:           // Add thousand seperators 1.234.567,89
 166:           var size = decimals[0].length;
 167:           for (var i=0; i < size; i++) {
 168:                t = decimals[0].substr((size-1)-i, 1) + t;
 169:                if ((i+1) % 3) {
 170:                    // Ignore
 171:                } else {
 172:                    if (i < size - 1) {
 173:                        t = this.locale.getThousandSeperator() + t;
 174:                    }
 175:                }
 176:           }
 177:       } else {
 178:            t = s;
 179:       }
 180:       if (decimals.length === 2) {
 181:            t += this.locale.getDecimalPoint() + decimals[1]
 182:       }
 183:       return t;
 184:    }
 185:    
 186:}

CountryCode

Den fulde kildekode for:

CountryCode.js.php.html

CountryCode.js.php

   1:<?
   2:/**
   3: * This class simulates a CountryCode object, in a very primitive matter
   4: *
   5: * class CountryCode {
   6: *    public static final String DK = "DK";
   7: *    public static final String NO = "NO"; // Etc.
   8: * }
   9: *
  10: * @package javascript
  11: * @author    http://Finn-Rasmussen.com
  12: * @copyright http://Finn-Rasmussen.com
  13: * @version 1.10
  14: * @since 22-feb-2007
  15: */
  16:
  17:/**
  18: * The supported Country Codes
  19: * @see http://www.iso.org/iso/en/prods-services/iso3166ma/02iso-3166-code-lists/list-en1.html
  20: * @see http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html
  21: * The constructor function simulates