// Handles related-objects functionality: lookup link for raw_id_fields

// and Add Another links.

function html_unescape(text) {

    // Unescape a string that was escaped using django.utils.html.escape.

    text = text.replace(/&lt;/g, '<');

    text = text.replace(/>/g, '>');

    text = text.replace(/"/g, '"');

    text = text.replace(/'/g, "'");

    text = text.replace(/&/g, '&');

    return text;

}

// IE doesn't accept periods or dashes in the window name, but the element IDs

// we use to generate popup window names may contain them, therefore we map them

// to allowed characters in a reversible way so that we can locate the correct 

// element when the popup window is dismissed.

function id_to_windowname(text) {

    text = text.replace(/\./g, '__dot__');

    text = text.replace(/\-/g, '__dash__');

    return text;

}

function windowname_to_id(text) {

    text = text.replace(/__dot__/g, '.');

    text = text.replace(/__dash__/g, '-');

    return text;

}

function showRelatedObjectLookupPopup(triggeringLink) {

    var name = triggeringLink.id.replace(/^lookup_/, '');

    name = id_to_windowname(name);

    var href;

    if (triggeringLink.href.search(/\?/) >= 0) {

        href = triggeringLink.href + '&pop=1';

    } else {

        href = triggeringLink.href + '?pop=1';

    }

    var win = window.open(href, name, 'height=500,width=800,resizable=yes,scrollbars=yes');

    win.focus();

    return false;

}

function dismissRelatedLookupPopup(win, chosenId) {

    var name = windowname_to_id(win.name);

    var elem = document.getElementById(name);

    if (elem.className.indexOf('vManyToManyRawIdAdminField') != -1 && elem.value) {

        elem.value += ',' + chosenId;

    } else {

        document.getElementById(name).value = chosenId;

    }

    win.close();

}

function showAddAnotherPopup(triggeringLink) {

    var name = triggeringLink.id.replace(/^add_/, '');

    name = id_to_windowname(name);

    href = triggeringLink.href

    if (href.indexOf('?') == -1) {

        href += '?_popup=1';

    } else {

        href  += '&_popup=1';

    }

    var win = window.open(href, name, 'height=500,width=800,resizable=yes,scrollbars=yes');

    win.focus();

    return false;

}

function dismissAddAnotherPopup(win, newId, newRepr) {

    // newId and newRepr are expected to have previously been escaped by

    // django.utils.html.escape.

    newId = html_unescape(newId);

    newRepr = html_unescape(newRepr);

    var name = windowname_to_id(win.name);

    var elem = document.getElementById(name);

    if (elem) {

        if (elem.nodeName == 'SELECT') {

            var o = new Option(newRepr, newId);

            elem.options[elem.options.length] = o;

            o.selected = true;

        } else if (elem.nodeName == 'INPUT') {

            if (elem.className.indexOf('vManyToManyRawIdAdminField') != -1 && elem.value) {

                elem.value += ',' + newId;

            } else {

                elem.value = newId;

            }

        }

    } else {

        var toId = name + "_to";

        elem = document.getElementById(toId);

        var o = new Option(newRepr, newId);

        SelectBox.add_to_cache(toId, o);

        SelectBox.redisplay(toId);

    }

    win.close();

}