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