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var SelectBox = {
cache: new Object(),
init: function(id) {
var box = document.getElementById(id);
var node;
SelectBox.cache[id] = new Array();
var cache = SelectBox.cache[id];
for (var i = 0; (node = box.options[i]); i++) {
cache.push({value: node.value, text: node.text, displayed: 1});
}
},
redisplay: function(id) {
// Repopulate HTML select box from cache
var box = document.getElementById(id);
box.options.length = 0; // clear all options
for (var i = 0, j = SelectBox.cache[id].length; i < j; i++) {
var node = SelectBox.cache[id][i];
if (node.displayed) {
box.options[box.options.length] = new Option(node.text, node.value, false, false);
}
}
},
filter: function(id, text) {
// Redisplay the HTML select box, displaying only the choices containing ALL
// the words in text. (It's an AND search.)
var tokens = text.toLowerCase().split(/\s+/);
var node, token;
for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
node.displayed = 1;
for (var j = 0; (token = tokens[j]); j++) {
if (node.text.toLowerCase().indexOf(token) == -1) {
node.displayed = 0;
}
}
}
SelectBox.redisplay(id);
},
delete_from_cache: function(id, value) {
var node, delete_index = null;
for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
if (node.value == value) {
delete_index = i;
break;
}
}
var j = SelectBox.cache[id].length - 1;
for (var i = delete_index; i < j; i++) {
SelectBox.cache[id][i] = SelectBox.cache[id][i+1];
}
SelectBox.cache[id].length--;
},
add_to_cache: function(id, option) {
SelectBox.cache[id].push({value: option.value, text: option.text, displayed: 1});
},
cache_contains: function(id, value) {
// Check if an item is contained in the cache
var node;
for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
if (node.value == value) {
return true;
}
}
return false;
},
move: function(from, to) {
var from_box = document.getElementById(from);
var to_box = document.getElementById(to);
var option;
for (var i = 0; (option = from_box.options[i]); i++) {
if (option.selected && SelectBox.cache_contains(from, option.value)) {
SelectBox.add_to_cache(to, {value: option.value, text: option.text, displayed: 1});
SelectBox.delete_from_cache(from, option.value);
}
}
SelectBox.redisplay(from);
SelectBox.redisplay(to);
},
move_all: function(from, to) {
var from_box = document.getElementById(from);
var to_box = document.getElementById(to);
var option;
for (var i = 0; (option = from_box.options[i]); i++) {
if (SelectBox.cache_contains(from, option.value)) {
SelectBox.add_to_cache(to, {value: option.value, text: option.text, displayed: 1});
SelectBox.delete_from_cache(from, option.value);
}
}
SelectBox.redisplay(from);
SelectBox.redisplay(to);
},
sort: function(id) {
SelectBox.cache[id].sort( function(a, b) {
a = a.text.toLowerCase();
b = b.text.toLowerCase();
try {
if (a > b) return 1;
if (a < b) return -1;
}
catch (e) {
// silently fail on IE 'unknown' exception
}
return 0;
} );
},
select_all: function(id) {
var box = document.getElementById(id);
for (var i = 0; i < box.options.length; i++) {
box.options[i].selected = 'selected';
}
}
}
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