function OnInit(initData) {
    initData.name = 'SelectPrevious';
    initData.version = '2025-07-22';
    initData.url = 'https://resource.dopus.com/t/how-to-create-a-button-to-select-all-items-below-the-current-selection/56553/2';
    initData.desc = 'SelectPrevious';
    initData.default_enable = true;
    initData.min_version = '12.0';
}

function OnAddCommands(addCmdData) {
    var cmd = addCmdData.AddCommand();
    cmd.name = 'SelectPrevious';
    cmd.method = 'OnSelectPrevious';
    cmd.desc = 'SelectPrevious';
    cmd.label = 'SelectPrevious';
    cmd.hide = false;
    cmd.icon = 'script';
}

function OnSelectPrevious(scriptCmdData) {
    var cmd = scriptCmdData.func.command;
    var tab = scriptCmdData.func.sourcetab;

    cmd.deselect = false;

    if (!tab.all.count) return;

    if (tab.selected.count > 0) {
        var firstSel = String(tab.selected(0).realpath);
        cmd.ClearFiles();
        for (var e = new Enumerator(tab.all); !e.atEnd(); e.moveNext()) {
            var item = e.item();
            if (String(item.realpath) == firstSel) break;
            cmd.AddFile(item);
        }
    } else {
        cmd.SetFiles(tab.all);
    }

    cmd.RunCommand('Select FROMSCRIPT');
}