/// <reference path="../../../lib/jquery-1.2.6.js" />
/*
Masked Input plugin for jQuery
Copyright (c) 2007-2009 Josh Bush (digitalbush.com)
Licensed under the MIT license (http://digitalbush.com/projects/masked-input-plugin/#license) 
Version: 1.2.2 (03/09/2009 22:39:06)
*/
(function($) {
   var pasteEventName = ($.browser.msie ? 'paste' : 'input') + ".mask";
   var iPhone = (window.orientation != undefined);

   $.mask = {
      //Predefined character definitions
      definitions: {
         '9': "[0-9]",
         'a': "[A-Za-z]",
         '*': "[A-Za-z0-9]"
      }
   };

   $.fn.extend({
      //Helper Function for Caret positioning
      caret: function(begin, end) {
         if (this.length == 0) return;
         if (typeof begin == 'number') {
            end = (typeof end == 'number') ? end : begin;
            return this.each(function() {
               if (this.setSelectionRange) {
                  this.focus();
                  this.setSelectionRange(begin, end);
               } else if (this.createTextRange) {
                  var range = this.createTextRange();
                  range.collapse(true);
                  range.moveEnd('character', end);
                  range.moveStart('character', begin);
                  range.select();
               }
            });
         } else {
            if (this[0].setSelectionRange) {
               begin = this[0].selectionStart;
               end = this[0].selectionEnd;
            } else if (document.selection && document.selection.createRange) {
               var range = document.selection.createRange();
               begin = 0 - range.duplicate().moveStart('character', -100000);
               end = begin + range.text.length;
            }
            return { begin: begin, end: end };
         }
      },
      unmask: function() { return this.trigger("unmask"); },
      mask: function(mask, settings) {
         if (!mask && this.length > 0) {
            var input = $(this[0]);
            var tests = input.data("tests");
            return $.map(input.data("buffer"), function(c, i) {
               return tests[i] ? c : null;
            }).join('');
         }
         settings = $.extend({
            placeholder: "_",
            completed: null
         }, settings);

         var defs = $.mask.definitions;
         var tests = [];
         var partialPosition = mask.length;
         var firstNonMaskPos = null;
         var len = mask.length;

         $.each(mask.split(""), function(i, c) {
            if (c == '?') {
               len--;
               partialPosition = i;
            } else if (defs[c]) {
               tests.push(new RegExp(defs[c]));
               if (firstNonMaskPos == null)
                  firstNonMaskPos = tests.length - 1;
            } else {
               tests.push(null);
            }
         });

         return this.each(function() {
            var input = $(this);
            if (!$(input).data('mask')) {
               $(input).data('mask', true);
               var buffer = $.map(mask.split(""), function(c, i) { if (c != '?') return defs[c] ? settings.placeholder : c });
               var ignore = false;  			//Variable for ignoring control keys
               var focusText = input.val();

               input.data("buffer", buffer).data("tests", tests);

               function seekNext(pos) {
                  while (++pos <= len && !tests[pos]);
                  return pos;
               };

               function shiftL(pos) {
                  while (!tests[pos] && --pos >= 0);
                  for (var i = pos; i < len; i++) {
                     if (tests[i]) {
                        buffer[i] = settings.placeholder;
                        var j = seekNext(i);
                        if (j < len && tests[i].test(buffer[j])) {
                           buffer[i] = buffer[j];
                        } else
                           break;
                     }
                  }
                  writeBuffer();
                  input.caret(Math.max(firstNonMaskPos, pos));
               };

               function shiftR(pos) {
                  for (var i = pos, c = settings.placeholder; i < len; i++) {
                     if (tests[i]) {
                        var j = seekNext(i);
                        var t = buffer[i];
                        buffer[i] = c;
                        if (j < len && tests[j].test(t))
                           c = t;
                        else
                           break;
                     }
                  }
               };

               function keydownEvent(e) {
                  var pos = $(this).caret();
                  var k = e.keyCode;
                  ignore = (k < 16 || (k > 16 && k < 32) || (k > 32 && k < 41));

                  //delete selection before proceeding
                  if ((pos.begin - pos.end) != 0 && (!ignore || k == 8 || k == 46))
                     clearBuffer(pos.begin, pos.end);

                  //backspace, delete, and escape get special treatment
                  if (k == 8 || k == 46 || (iPhone && k == 127)) {//backspace/delete
                     shiftL(pos.begin + (k == 46 ? 0 : -1));
                     return false;
                  } else if (k == 27) {//escape
                     input.val(focusText);
                     input.caret(0, checkVal());
                     return false;
                  }
               };

               function keypressEvent(e) {
                  if (ignore) {
                     ignore = false;
                     //Fixes Mac FF bug on backspace
                     return (e.keyCode == 8) ? false : null;
                  }
                  e = e || window.event;
                  var k = e.charCode || e.keyCode || e.which;
                  var pos = $(this).caret();

                  if (e.ctrlKey || e.altKey || e.metaKey) {//Ignore
                     return true;
                  } else if ((k >= 32 && k <= 125) || k > 186) {//typeable characters
                     var p = seekNext(pos.begin - 1);
                     if (p < len) {
                        var c = String.fromCharCode(k);
                        if (tests[p].test(c)) {
                           shiftR(p);
                           buffer[p] = c;
                           writeBuffer();
                           var next = seekNext(p);
                           $(this).caret(next);
                           if (settings.completed && next == len)
                              settings.completed.call(input);
                        }
                     }
                  }
                  return false;
               };

               function clearBuffer(start, end) {
                  for (var i = start; i < end && i < len; i++) {
                     if (tests[i])
                        buffer[i] = settings.placeholder;
                  }
               };

               function writeBuffer() { return input.val(buffer.join('')).val(); };

               function checkVal(allow) {
                  //try to place characters where they belong
                  var test = input.val();
                  var lastMatch = -1;
                  for (var i = 0, pos = 0; i < len; i++) {
                     if (tests[i]) {
                        buffer[i] = settings.placeholder;
                        while (pos++ < test.length) {
                           var c = test.charAt(pos - 1);
                           if (tests[i].test(c)) {
                              buffer[i] = c;
                              lastMatch = i;
                              break;
                           }
                        }
                        if (pos > test.length)
                           break;
                     } else if (buffer[i] == test[pos] && i != partialPosition) {
                        pos++;
                        lastMatch = i;
                     }
                  }
                  if (!allow && lastMatch + 1 < partialPosition) {
                     input.val("");
                     clearBuffer(0, len);
                  } else if (allow || lastMatch + 1 >= partialPosition) {
                     writeBuffer();
                     if (!allow) input.val(input.val().substring(0, lastMatch + 1));
                  }
                  return (partialPosition ? i : firstNonMaskPos);
               };

               if (!input.attr("readonly"))
                  input
					.one("unmask", function() {
					   input
							.unbind(".mask")
							.removeData("buffer")
							.removeData("tests");
					})
					.bind("focus.mask", function() {
					   focusText = input.val();
					   var pos = checkVal();
					   writeBuffer();
					   setTimeout(function() {
					      if (pos == mask.length)
					         input.caret(0, pos);
					      else
					         input.caret(pos);
					   }, 0);
					})
					.bind("blur.mask", function() {
					   checkVal();
					   if (input.val() != focusText)
					      input.change();
					})
					.bind("keydown.mask", keydownEvent)
					.bind("keypress.mask", keypressEvent)
					.bind(pasteEventName, function() {
					   setTimeout(function() { input.caret(checkVal(true)); }, 0);
					});

               checkVal(); //Perform initial check for existing values
            }
         });
      }
   });
})(jQuery);