function OnInit(initData) {
    initData.name = 'RenameTabItemCount';
    initData.version = '2022-12-30';
    initData.copyright = '';
    initData.url = 'https://resource.dopus.com/t/item-count-in-tab-name/43276';
    initData.desc = 'Show number of items in folder tab';
    initData.default_enable = true;
    initData.min_version = '12.0';
}

function OnOpenLister(openListerData) {
    DOpus.Output('*** OnOpenLister');
    if (!openListerData.after) return true;
    AppendItemCount(openListerData.lister.activetab);
    return false;
}

function OnActivateLister(activateListerData) {
    DOpus.Output('*** OnActivateLister');
    if (!activateListerData.active) return;
    AppendItemCount(activateListerData.lister.activetab);
}

function OnOpenTab(openTabData) {
    DOpus.Output('*** OnOpenTab');
    AppendItemCount(openTabData.tab);
}

function OnActivateTab(activateTabData) {
    DOpus.Output('*** OnActivateTab');
    AppendItemCount(activateTabData.newtab);
}

function OnSourceDestChange(sourceDestChangeData) {
    DOpus.Output('*** OnSourceDestChange');
    AppendItemCount(sourceDestChangeData.tab);
}

function OnAfterFolderChange(afterFolderChangeData) {
    DOpus.Output('*** OnAfterFolderChange');
    AppendItemCount(afterFolderChangeData.tab);
}

function OnDoubleClick(doubleClickData) {
    DOpus.Output('*** OnDoubleClick');
    AppendItemCount(doubleClickData.tab);
}

function OnDisplayModeChange(displayModeChangeData) {
    DOpus.Output('*** OnDisplayModeChange');
    AppendItemCount(displayModeChangeData.tab);
}

function OnTabClick(tabClickData) {
    DOpus.Output('*** OnTabClick');
    AppendItemCount(tabClickData.tab);
}

var cmd = DOpus.Create().Command();
var fsu = DOpus.FSUtil();

function AppendItemCount(tab) {
    for (var e = new Enumerator(tab.lister.tabs); !e.atEnd(); e.moveNext()) {
        var tabItem = e.item();

        DOpus.Output('tabItem.path: "' + tabItem.path + '"');

        var tabPath = String(tabItem.path);
        if (tabPath == '') continue;

        tabPath = fsu.Resolve(tabPath);

        var tabName = String(tabPath);

        if (tabName.substring(0, 2) == '::' || tabName.substring(0, 5) == 'coll:' || tabName.substring(0, 4) == 'ftp:') {
            tabName = fsu.DisplayName(tabPath);
        } else {
            if (tabName.slice(-1) == '\\') {
                var tabName = tabName.substring(0, 2);
            } else {
                var tabName = tabPath.filepart;
            }
        }

        var c = tabItem.all.count;
        var newTabName = tabName + (c > 0 ? (' (' + c + ')') : '');
        if (newTabName == tabItem.displayed_label) continue;

        cmd.SetSourceTab(tabItem);
        cmd.RunCommand('Go TABNAME="' + newTabName + '"');
    }
}