decePubClient/Components/PhoneSheet.razor

@inherits LocalizableComponentBase

@* What opens in place on a desktop (the composer at the top of the feed, a reply under its post) and as a sheet from the
   bottom of a phone's screen (below md), over a dimmed page, with its heading and a close button; a tap outside it or
   Escape closes it too. Class is the inline look from md (padding, a raised panel). *@
@if (IsOpen)
{
	<div class="max-md:fixed max-md:inset-0 max-md:z-[60] max-md:flex max-md:flex-col max-md:justify-end" @onkeydown="OnKeyDown">
		<div class="md:hidden absolute inset-0 bg-black/40" aria-hidden="true" @onclick="Close"></div>
		<div class="@($"relative max-md:max-h-[85dvh] max-md:overflow-y-auto max-md:overscroll-contain max-md:rounded-t-box max-md:bg-base-100 max-md:p-4 max-md:pb-[max(1rem,env(safe-area-inset-bottom))] {Class}")"
			 data-sheet>
			<div class="md:hidden flex items-center gap-3 mb-3">
				<b class="flex-1 min-w-0 truncate">@Heading</b>
				<button type="button" class="btn btn-sm btn-circle btn-ghost flex-none" aria-label="@Localizer["Close"]" title="@Localizer["Close"]"
						@onclick="Close" data-sheet-close>
					<i class="ion-md-close" aria-hidden="true"></i>
				</button>
			</div>
			@ChildContent
		</div>
	</div>
}

@code {
	[Parameter] public bool IsOpen { get; set; }
	[Parameter] public EventCallback OnClose { get; set; }
	/// <summary>The sheet's heading on a phone.</summary>
	[Parameter] public string Heading { get; set; }
	[Parameter] public RenderFragment ChildContent { get; set; }
	[Parameter] public string Class { get; set; }

	[Inject] OverlayService Overlays { get; set; }

	IDisposable overlay;

	protected override void OnInitialized() => IsLoading = false;

	// open, the Back button closes it
	protected override void OnParametersSet()
	{
		if (IsOpen && overlay is null)
			overlay = Overlays.Open(() => InvokeAsync(Close));
		else if (!IsOpen && overlay is not null)
		{
			overlay.Dispose();
			overlay = null;
		}
	}

	public override async ValueTask DisposeAsync()
	{
		overlay?.Dispose();
		await base.DisposeAsync();
	}

	Task Close() => OnClose.InvokeAsync();

	Task OnKeyDown(KeyboardEventArgs e) => e.Key == "Escape" ? Close() : Task.CompletedTask;
}