1 /*

     2  * Copyright (C) 2004 Baron Schwartz <baron at sequent dot org>

     3  *

     4  * This program is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU Lesser General Public License as published by the

     6  * Free Software Foundation, version 2.1.

     7  *

     8  * This program is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

    10  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more

    11  * details.

    12  */

    13 

    14 var key;

    15 var combo;

    16 

    17 document.onkeydown = function(e) {

    18     if (combo && combo.editing && window.event && window.event.keyCode == 8) {

    19         window.event.cancelBubble = true;

    20         window.event.returnValue = false;

    21         if (combo.insertSpace) {

    22             combo.insertSpace = false;

    23         }

    24         else {

    25             with (combo.options[combo.options.length - 1]) {

    26                 text = text.substring(0, text.length - 1);

    27             }

    28         }

    29     }

    30 }

    31 

    32 function edit(e) {

    33     if (window.event){

    34         key = window.event.keyCode;

    35         combo = window.event.srcElement;

    36         // Stop the browser from scrolling through <option>s

    37         window.event.cancelBubble = true;

    38         window.event.returnValue = false;

    39     }

    40     else if (e) {

    41         key = e.which;

    42         combo = e.target;

    43     }

    44     else {

    45         return true;

    46     }

    47 

    48     if (key == 13 || key == 8 || (key > 31 && key < 127)) {

    49         if (combo.editing && key == 13) {

    50             // Done editing

    51             combo.editing = false;

    52             combo = null;

    53             return false;

    54         }

    55         else if (!combo.editing) {

    56             combo.editing = true;

    57             combo.options[combo.options.length] = new Option("");

    58         }

    59 

    60         // Normal key

    61         if (key > 32 && key < 127) {

    62             with (combo.options[combo.options.length - 1]) {

    63                 if (combo.insertSpace) {

    64                     combo.insertSpace = false;

    65                     text = text + " " + String.fromCharCode(key);

    66                 }

    67                 else {

    68                     text = text + String.fromCharCode(key);

    69                 }

    70             }

    71         }

    72         // The backspace key

    73         else if (key == 8 && combo.options[combo.options.length - 1].text.length) {

    74             if (combo.insertSpace) {

    75                 combo.insertSpace = false;

    76             }

    77             else {

    78                 with (combo.options[combo.options.length - 1]) {

    79                     text = text.substring(0, text.length - 1);

    80                 }

    81             }

    82         }

    83         // Space key requires special treatment; some browsers will not append a space

    84         else if (key == 32) {

    85             combo.insertSpace = true;

    86         }

    87         combo.selectedIndex = combo.options.length - 1;

    88         return false;

    89     }

    90 }