protected override void OnStart(TextWriter writer)
{
// Check if we're in a navbar, and if so, make sure we're in a navbar nav
if (GetComponent <INavbar>() != null && GetComponent <INavbarNav>() == null)
{
new NavbarNav <THelper>(Helper).Start(writer);
}
// Check if we're in a nav
if (GetComponent <INav>(true) != null || GetComponent <INavbarNav>(true) != null)
{
TagName = "li";
Link <THelper> link = Helper.Link(null);
link.AddCss(Css.DropdownToggle);
link.AddAttribute("data-toggle", "dropdown");
_toggle = link;
}
else
{
// Create a button and copy over any button classes and text
Button <THelper> button = Helper.Button();
button.RemoveCss(Css.BtnDefault);
button.AddCss(Css.DropdownToggle);
button.AddAttribute("data-toggle", "dropdown");
foreach (string buttonClass in CssClasses.Where(x => x.StartsWith("btn")))
{
button.CssClasses.Add(buttonClass);
}
_toggle = button;
}
CssClasses.RemoveWhere(x => x.StartsWith("btn"));
// Add the text and caret
if (!string.IsNullOrWhiteSpace(TextContent))
{
_toggle.AddChild(new Content <THelper>(Helper, TextContent + " "));
}
else
{
Element <THelper> element = new Element <THelper>(Helper, "span").AddCss(Css.SrOnly);
element.AddChild(new Content <THelper>(Helper, "Toggle Dropdown"));
_toggle.AddChild(element);
}
TextContent = null;
if (_caret)
{
_toggle.AddChild(Helper.Caret());
}
// Check if we're in a IDropdownButton or IInputGroupButton, then
// Check if we're in a button group, and if so change the outer CSS class
// Do this after copying over the btn classes so this doesn't get copied
if (GetComponent <IDropdownButton>(true) != null || GetComponent <IInputGroupButton>(true) != null)
{
_dropdownButton = true;
}
else if (GetComponent <IButtonGroup>(true) != null)
{
ToggleCss(Css.BtnGroup, true, Css.Dropdown);
}
// Create the list
_list = Helper.List(ListType.Unordered);
_list.AddCss(Css.DropdownMenu);
_list.MergeAttribute("role", "menu");
if (_menuRight)
{
_list.AddCss(Css.DropdownMenuRight);
}
if (_menuLeft)
{
_list.AddCss(Css.DropdownMenuLeft);
}
// Start this component
base.OnStart(_dropdownButton ? new SuppressOutputWriter() : writer);
// Output the button
_toggle.StartAndFinish(writer);
// Output the start of the list
_list.Start(writer);
}
