public async Task Navigate(NavigateInfo info)
{
if (info?.PageType != null && LockNavigation())
{
switch (info.Mode)
{
case NavigateMode.Default:
CurrentSectionRootPageType = NavigationHelper.GetSectionRootPageTypeForPage(info.PageType);
var page = info.CreatePage();
await _navigation.PushAsync(page);
break;
case NavigateMode.RemovePrevious:
case NavigateMode.RemoveAllPrevious:
CurrentSectionRootPageType = NavigationHelper.GetSectionRootPageTypeForPage(info.PageType);
page = info.CreatePage();
await _navigation.PushAsync(page);
var numberPagesToRemove = info.Mode == NavigateMode.RemovePrevious ? (int?)(info.NavigateParam as int? ?? 1) : null;
while ((numberPagesToRemove == null || numberPagesToRemove > 0) && _navigation.NavigationStack.Count > 1)
{
_navigation.RemovePage(_navigation.NavigationStack[_navigation.NavigationStack.Count - 2]);
if (numberPagesToRemove != null)
{
numberPagesToRemove--;
}
}
break;
case NavigateMode.ToSectionRoot:
var last = _navigation.NavigationStack.LastOrDefault();
if (last == null || last.GetType() != info.PageType)
{
CurrentSectionRootPageType = info.PageType;
page = _navigation.NavigationStack.FirstOrDefault(p => p.GetType() == info.PageType) as BasePage;
if (page != null)
{
var i = _navigation.NavigationStack.Count - 2;
var pageForRemove = _navigation.NavigationStack[i];
while (pageForRemove != page)
{
_navigation.RemovePage(pageForRemove);
pageForRemove = _navigation.NavigationStack[--i];
}
await _navigation.PopAsync();
}
else
{
await _navigation.PushAsync(info.CreatePage());
}
}
break;
case NavigateMode.Modal:
var modalPage = info.CreateModalPage();
await _navigation.PushModalAsync(modalPage);
break;
}
UnlockNavigation();
}
}
private async void ExecuteNavigateCommand(NavigateInfo info)
{
await Navigate(info);
}