public async Task OnLinkClickAsync(MouseEventArgs args, AnchorLink anchorLink)
{
await JsInvokeAsync("window.eval", $"window.location.hash='{anchorLink._hash}'");
if (OnClick.HasDelegate)
{
await OnClick.InvokeAsync(new Tuple <MouseEventArgs, AnchorLink>(args, anchorLink));
}
}
private async Task ActivateAsync(AnchorLink anchorLink, bool active)
{
anchorLink.Activate(active);
if (active && _activeLink != _lastActiveLink)
{
_lastActiveLink = _activeLink;
if (OnChange.HasDelegate)
{
await OnChange.InvokeAsync(anchorLink.Href);
}
}
}
private async void OnScroll(JsonElement obj)
{
_activeLink = null;
_flatLinks.ForEach(l => l.Activate(false));
int offset = OffsetBottom.HasValue ? OffsetBottom.Value : -OffsetTop.Value;
foreach (var link in _flatLinks)
{
try
{
DomRect hrefDom = await link.GetHrefDom();
if (hrefDom != null)
{
_linkTops[link.Href] = hrefDom.top + offset;
}
}
catch (Exception ex)
{
_linkTops[link.Href] = 1;
}
}
string activeKey = _linkTops.Where(p => (int)p.Value <= 0).OrderBy(p => p.Value).LastOrDefault().Key;
if (!string.IsNullOrEmpty(activeKey))
{
_activeLink = _flatLinks.Single(l => l.Href == activeKey);
await ActivateAsync(_activeLink, true);
}
if (Affix && _activeLink != null)
{
_ballClass = "ant-anchor-ink-ball visible";
decimal top = (_activeLink.LinkDom.top - _selfDom.top) + _activeLink.LinkDom.height / 2 - 2;
_ballStyle = $"top: {top}px;";
}
else
{
_ballClass = "ant-anchor-ink-ball";
_ballStyle = string.Empty;
}
StateHasChanged();
}
protected override async Task OnFirstAfterRenderAsync()
{
_selfDom = await JsInvokeAsync <DomRect>(JSInteropConstants.getBoundingClientRect, _ink);
_linkTops = new Dictionary <string, decimal>();
_flatLinks = FlatChildren();
foreach (var link in _flatLinks)
{
_linkTops[link.Href] = 1;
}
if (GetCurrentAnchor != null)
{
AnchorLink link = _flatLinks.SingleOrDefault(l => l.Href == GetCurrentAnchor());
if (link != null)
{
try
{
DomRect hrefDom = await link.GetHrefDom(true);
if (hrefDom != null)
{
await ActivateAsync(link, true);
// the offset does not matter, since the dictionary's value will not change any more in case user set up GetCurrentAnchor
_linkTops[link.Href] = hrefDom.top;
StateHasChanged();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
await base.OnFirstAfterRenderAsync();
}
public void Add(AnchorLink anchorLink)
{
_links.Add(anchorLink);
}