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/*
* This is based on the SelectBox.js that comes with Django admin media
*
*/
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, tree_id: node.getAttribute('data-tree-id'), left_val: node.getAttribute('data-left-value')});
}
},
redisplay: function(id) {
// Repopulate HTML select box from cache
var box = document.getElementById(id);
// for some reason both these steps are neccessary to get browsers to work properly...
for (i = 0; i < box.options.length; i++) {
box.options[0] = null;
}
box.options.length = 0;
SelectBox.sort(id);
for (var i = 0, j = SelectBox.cache[id].length; i < j; i++) {
var node = SelectBox.cache[id][i];
if (node.displayed) {
newOpt = new Option(node.text, node.value, false, false);
newOpt.setAttribute('data-tree-id', node.tree_id);
newOpt.setAttribute('data-left-value', node.left_val);
box.options[box.options.length] = newOpt;
}
}
},
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) {
// in this case option is an anonymous object, not an html element
SelectBox.cache[id].push({value: option.value, text: option.text, displayed: 1, tree_id: option.tree_id, left_val: option.left_val});
},
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, tree_id: option.getAttribute('data-tree-id'), left_val: option.getAttribute('data-left-value')});
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, tree_id: option.getAttribute('data-tree-id'), left_val: option.getAttribute('data-left-value')});
SelectBox.delete_from_cache(from, option.value);
}
}
SelectBox.redisplay(from);
SelectBox.redisplay(to);
},
sort: function(id) {
SelectBox.cache[id].sort( function(a, b) {
a_tree_id = parseInt(a.tree_id);
b_tree_id = parseInt(b.tree_id);
a_left_val = parseInt(a.left_val);
b_left_val = parseInt(b.left_val);
try {
if (a_tree_id > b_tree_id) return 1;
if (a_tree_id < b_tree_id) return -1;
if (a_tree_id == b_tree_id) {
if (a_left_val > b_left_val) return 1;
if (a_left_val < b_left_val) 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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