jquery.geo.typing.js

/* jQuery geo typing
 * http://tbliseli.com
 * Copyright (c) 2010 Nika Gejadze
 * Thanks To Lado Kumsiashvili ( herrlado )
 * Version 0.1
 * Licensed under GPL:
 * http://www.gnu.org/licenses/gpl.html 
 */
(function($) {
    $.fn.geo = function(opt) {
        var def = {
            turn: "on"
        };
        var opt = $.extend(def, opt);
        $(this).unbind('keypress');
        this.each(function() {
            $(this).keypress(function(e) {
                if (!e.ctrlKey && !e.altKey && !e.metaKey) {
                    var code = (e.keyCode ? e.keyCode : e.which);
                    if (code > 64 && code <= 127) {
                        if (opt.turn === "on") {
                            e.preventDefault();
                            var text = String.fromCharCode(ide(code));
                            if (document.selection) {
                                this.focus();
                                var sel = document.selection.createRange();
                                sel.select();
                                sel.text = text;
                                var lenght = sel.text.lenght;
                                sel.moveStart('character', text.length);
                                sel.moveEnd('character', text.length);
                            } else if (this.selectionStart || this.selectionStart === 0) {
                                var start = this.selectionStart;
                                var end = this.selectionEnd;
                                var prefix = this.value.substring(0, start);
                                var suffix = this.value.substring(end, this.value.length);
                                var scrollTop = this.scrollTop;
                                this.value = prefix + text + suffix;
                                this.focus();
                                this.selectionStart = start + text.length;
                                this.selectionEnd = end + text.length;
                                this.scrollTop = scrollTop;
                            } else {
                                this.value += text;
                            }
                        }
                    }
                }
            });
        });
        // Mapping
        function ide(num) {
            var value = lookUp[num];
            return value ? value : num;
        }
        //lookup table
        var lookUp = {
            74: 4319, 82: 4326, 83: 4328, 90: 4331,
            97: 4304, 98: 4305, 99: 4330, 100: 4307,
            101: 4308, 102: 4324, 103: 4306, 104: 4336,
            105: 4312, 106: 4335, 107: 4313, 108: 4314,
            109: 4315, 110: 4316, 111: 4317, 112: 4318,
            113: 4325, 114: 4320, 115: 4321, 116: 4322,
            84: 4311, 117: 4323, 118: 4309, 119: 4332,
            87: 4333, 120: 4334, 121: 4327, 122: 4310,
            67: 4329
        };
    };
})(jQuery);