textformat.js

// Copyright (C) 2005 Rod Roark <rod@sunsetsystems.com>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.

// Onkeyup handler for dates.  Converts dates that are keyed in to a
// consistent format, and helps to reduce typing errors.
//
function datekeyup(e, defcc, withtime) {
 if (typeof(withtime) == 'undefined') withtime = false;

 while(true) {
  var delim = '';
  var arr = new Array(0, 0, 0, 0, 0, 0);
  var ix = 0;
  var v = e.value;

  // Build an array to facilitate error checking.
  for (var i = 0; i < v.length; ++i) {
   var c = v.charAt(i);
   if (c >= '0' && c <= '9') {
    ++arr[ix];
   } else if (ix < 2 && (c == '-' || c == '/')) {
    arr[++ix] = 0;
   } else if (withtime && ix == 2 && c == ' ') {
    arr[++ix] = 0;
   } else if (withtime && (ix == 3 || ix == 4) && c == ':') {
    arr[++ix] = 0;
   } else {
    e.value = v.substring(0, i);
    return;
   }
  }

  // We have finished scanning the string.  If there is a problem,
  // drop the last character and repeat the loop.
  if ((ix > 5) ||
      (!withtime && ix > 2)   ||
      (ix > 4 && arr[4] == 0) ||
      (ix > 3 && arr[3] == 0) ||
      (ix > 2 && arr[2] == 0) ||
      (ix > 1 && arr[1] == 0) ||
      (ix > 0 && arr[0] == 0) ||
      (arr[0] > 8) ||
      (ix > 0 && arr[0] > 2 && (arr[0] != 4 || arr[1] > 2 || arr[2] > 2)) ||
      (arr[2] > 2 && (arr[2] > 4 || arr[0] > 2 || arr[1] > 2)))
  {
   e.value = v.substring(0, v.length - 1);
  } else {
   break;
  }
 }

 // The remainder does reformatting if there is enough data for that.
 if (arr[2] == 4 && defcc == '1') { // mm/dd/yyyy
  e.value  = v.substring(arr[0] + arr[1] + 2, arr[0] + arr[1] + 6) + '-'; // year
  if (arr[0] == 1) e.value += '0';
  e.value += v.substring(0, arr[0]) + '-'; // month
  if (arr[1] == 1) e.value += '0';
  e.value += v.substring(arr[0] + 1, arr[0] + 1 + arr[1]); // day
 }
 else if (arr[2] == 4) { // dd-mm-yyyy
  e.value  = v.substring(arr[0] + arr[1] + 2, arr[0] + arr[1] + 6) + '-'; // year
  if (arr[1] == 1) e.value += '0';
  e.value += v.substring(arr[0] + 1, arr[0] + 1 + arr[1]) + '-'; // month
  if (arr[0] == 1) e.value += '0';
  e.value += v.substring(0, arr[0]); // day
 }
 else if (arr[0] == 4 && arr[2] > 0) { // yyyy-mm-dd
  e.value  = v.substring(0, arr[0]) + '-'; // year
  if (arr[1] == 1) e.value += '0';
  e.value += v.substring(arr[0] + 1, arr[0] + 1 + arr[1]) + '-'; // month
  e.value += v.substring(arr[0] + arr[1] + 2, arr[0] + arr[1] + 2 + arr[2]); // day (may be 1 digit)
 }
 else if (arr[0] == 8 && defcc == '1') { // yyyymmdd
  e.value  = v.substring(0, 4) + '-'; // year
  e.value += v.substring(4, 6) + '-'; // month
  e.value += v.substring(6, 8); // day
 }
 else if (arr[0] == 8) { // ddmmyyyy
  e.value  = v.substring(4, 8) + '-'; // year
  e.value += v.substring(2, 4) + '-'; // month
  e.value += v.substring(0, 2); // day
 }
 else {
  return;
 }
 if (withtime) {
  e.value += v.substring(arr[0] + arr[1] + arr[2] + 2);
 }
}

// Onblur handler to avoid incomplete entry of dates.
//
function dateblur(e, defcc, withtime) {
 if (typeof(withtime) == 'undefined') withtime = false;

 var v = e.value;
 if (v.length == 0) return;

 var arr = new Array(0, 0, 0, 0, 0);
 var ix = 0;
 for (var i = 0; i < v.length; ++i) {
  var c = v.charAt(i);
  if (c >= '0' && c <= '9') {
   ++arr[ix];
  } else if (c == '-' || c == '/' || c == ' ' || c == ':') {
   arr[++ix] = 0;
  } else {
   alert('Invalid character in date!');
   return;
  }
 }

 // A birth date may be just age in years, in which case we convert it.
 if (ix == 0 && arr[0] > 0 && arr[0] <= 3 && e.name.indexOf('DOB') >= 0) {
  var d = new Date();
  d = new Date(d.getTime() - parseInt(v) * 365.25 * 24 * 60 * 60 * 1000);
  var s = '' + d.getFullYear() + '-';
  if (d.getMonth() < 9) s += '0';
  s += (d.getMonth() + 1) + '-';
  if (d.getDate() < 10) s += '0';
  s += d.getDate();
  e.value = s;
  return;
 }

 if ((!withtime && ix != 2) || (withtime && ix < 2) || arr[0] != 4 || arr[1] != 2 || arr[2] < 1) {
  if (confirm('Date entry is incomplete! Try again?'))
   e.focus();
  else
   e.value = '';
  return;
 }

 if (arr[2] == 1) {
  e.value = v.substring(0, 8) + '0' + v.substring(8);
 }
}

// Private subroutine for US phone number formatting.
function usphone(v) {
 if (v.length > 0 && v.charAt(0) == '-') v = v.substring(1);
 var oldlen = v.length;
 for (var i = 0; i < v.length; ++i) {
  var c = v.charAt(i);
  if (c < '0' || c > '9') {
   v = v.substring(0, i) + v.substring(i + 1);
   --i;
  }
 }
 if (oldlen > 3 && v.length >= 3) {
  v = v.substring(0, 3) + '-' + v.substring(3);
  if (oldlen > 7 && v.length >= 7) {
   v = v.substring(0, 7) + '-' + v.substring(7);
   if (v.length > 12) v = v.substring(0, 12);
  }
 }
 return v;
}

// Private subroutine for non-US phone number formatting.
function nonusphone(v) {
 for (var i = 0; i < v.length; ++i) {
  var c = v.charAt(i);
  if (c < '0' || c > '9') {
   v = v.substring(0, i) + v.substring(i + 1);
   --i;
  }
 }
 return v;
}

// Telephone country codes that are exactly 2 digits.
var twodigitccs = '/20/30/31/32/33/34/36/39/40/41/43/44/45/46/47/48/49/51/52/53/54/55/56/57/58/60/61/62/63/64/65/66/81/82/84/86/90/91/92/93/94/95/98/';

// Onkeyup handler for phone numbers.  Helps to ensure a consistent
// format and to reduce typing errors.  defcc is the default telephone
// country code as a string.
//
function phonekeyup(e, defcc) {
 var v = e.value;
 var oldlen = v.length;

 // Deal with international formatting.
 if (v.length > 0 && v.charAt(0) == '+') {
  var cc = '';
  for (var i = 1; i < v.length; ++i) {
   var c = v.charAt(i);
   if (c < '0' || c > '9') {
    v = v.substring(0, i) + v.substring(i + i);
    --i;
    continue;
   }
   cc += c;
   if (i == 1 && oldlen > 2) {
    if (cc == '1') { // USA
     e.value = '+1-' + usphone(v.substring(2));
     return;
    }
    if (cc == '7') { // USSR
     e.value = '+7-' + nonusphone(v.substring(2));
     return;
    }
   }
   else if (i == 2 && oldlen > 3) {
    if (twodigitccs.indexOf(cc) >= 0) {
     e.value = v.substring(0, 3) + '-' + nonusphone(v.substring(3));
     return;
    }
   }
   else if (i == 3 && oldlen > 4) {
    e.value = v.substring(0, 4) + '-' + nonusphone(v.substring(4));
    return;
   }
  }
  e.value = v;
  return;
 }

 if (defcc == '1') {
  e.value = usphone(v);
 } else {
  e.value = nonusphone(v);
 }

 return;
}

// onKeyUp handler for mask-formatted fields.
// This feature is experimental.
function maskkeyup(elem, mask) {
 if (!mask || mask.length == 0) return;
 var i = 0; // elem and mask index
 var v = elem.value;
 for (; i < mask.length && i < v.length; ++i) {
  var ec = v.charAt(i);
  var mc = mask.charAt(i);
  if (mc == '#' && (ec < '0' || ec > '9')) {
   // digit required but this is not one
   break;
  }
  if (mc == '@' && ec.toLowerCase() == ec.toUpperCase()) {
   // alpha character required but this is not one
   break;
  }
 }
 v = v.substring(0, i);
 while (i < mask.length) {
  var mc = mask.charAt(i++);
  if (mc == '*' || mc == '#' || mc == '@') break;
  v += mc;
 }
 elem.value = v;
}

// onBlur handler for mask-formatted fields.
// This feature is experimental.
function maskblur(elem, mask) {
 var v = elem.value;
 var i = mask.length;
 if (i > 0 && v.length > 0 && v.length != i) {
  // there is a mask and a value but the value is not long enough
  for (; i > 0 && mask.charAt(i-1) == '#'; --i);
  // i is now index to first # in # string at end of mask
  if (i > v.length) {
   // value is too short even if trailing digits in the mask are ignored
   if (confirm('Field entry is incomplete! Try again?'))
    elem.focus();
   else
    elem.value = '';
   return;
  }
  // if the mask ends with digits then right-justify them in the value
  while (v.length < mask.length) {
   v = v.substring(0, i) + '0' + v.substring(i, v.length);
  }
  elem.value = v;
 }
}