app/django/contrib/admin/media/js/SelectBox.js
author Sverre Rabbelier <srabbelier@gmail.com>
Sat, 13 Dec 2008 12:49:11 +0000
changeset 729 7fe218e3d359
parent 54 03e267d67478
permissions -rw-r--r--
Make checkIsMyInvitation use Django to parse the URL Using django is more reliable and makes the code easier to read as there is no knowledge of the url layout required. Patch by: Sverre Rabbelier

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';
        }
    }
}