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(function($) {
'use strict';
var SelectBox = {
cache: {},
init: function(id) {
var box = document.getElementById(id);
var node;
SelectBox.cache[id] = [];
var cache = SelectBox.cache[id];
var boxOptions = box.options;
var boxOptionsLength = boxOptions.length;
for (var i = 0, j = boxOptionsLength; i < j; i++) {
node = boxOptions[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);
var node;
$(box).empty(); // clear all options
var new_options = box.outerHTML.slice(0, -9); // grab just the opening tag
var cache = SelectBox.cache[id];
for (var i = 0, j = cache.length; i < j; i++) {
node = cache[i];
if (node.displayed) {
var new_option = new Option(node.text, node.value, false, false);
// Shows a tooltip when hovering over the option
new_option.setAttribute("title", node.text);
new_options += new_option.outerHTML;
}
}
new_options += '</select>';
box.outerHTML = new_options;
},
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;
var cache = SelectBox.cache[id];
for (var i = 0, j = cache.length; i < j; i++) {
node = cache[i];
node.displayed = 1;
var node_text = node.text.toLowerCase();
var numTokens = tokens.length;
for (var k = 0; k < numTokens; k++) {
token = tokens[k];
if (node_text.indexOf(token) === -1) {
node.displayed = 0;
break; // Once the first token isn't found we're done
}
}
}
SelectBox.redisplay(id);
},
delete_from_cache: function(id, value) {
var node, delete_index = null;
var cache = SelectBox.cache[id];
for (var i = 0, j = cache.length; i < j; i++) {
node = cache[i];
if (node.value === value) {
delete_index = i;
break;
}
}
cache.splice(delete_index, 1);
},
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;
var cache = SelectBox.cache[id];
for (var i = 0, j = cache.length; i < j; i++) {
node = cache[i];
if (node.value === value) {
return true;
}
}
return false;
},
move: function(from, to) {
var from_box = document.getElementById(from);
var option;
var boxOptions = from_box.options;
var boxOptionsLength = boxOptions.length;
for (var i = 0, j = boxOptionsLength; i < j; i++) {
option = boxOptions[i];
var option_value = option.value;
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 option;
var boxOptions = from_box.options;
var boxOptionsLength = boxOptions.length;
for (var i = 0, j = boxOptionsLength; i < j; i++) {
option = boxOptions[i];
var option_value = option.value;
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);
var boxOptions = box.options;
var boxOptionsLength = boxOptions.length;
for (var i = 0; i < boxOptionsLength; i++) {
boxOptions[i].selected = 'selected';
}
}
};
window.SelectBox = SelectBox;
})(django.jQuery);
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