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Dialog.cs
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Dialog.cs
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using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Rendering;
namespace Ignis.Components.HeadlessUI;
/// <summary>
/// Renders a dialog which can be opened and closed.
/// </summary>
public sealed class Dialog : IgnisContentProviderComponentBase, IDialog, IHandleAfterRender
{
private readonly AttributeCollection _attributes;
private Type? _asComponent;
private string? _asElement;
private bool _isOpen;
/// <inheritdoc />
[Parameter]
public string? AsElement
{
get => _asElement;
set
{
_asElement = value;
_asComponent = null;
}
}
/// <inheritdoc />
[Parameter]
public Type? AsComponent
{
get => _asComponent;
set
{
_asComponent = value;
_asElement = null;
}
}
/// <inheritdoc />
[Parameter]
public bool IsOpen
{
get => _isOpen;
set
{
if (value) Open();
else Close();
}
}
/// <inheritdoc />
[Parameter]
public EventCallback<bool> IsOpenChanged { get; set; }
/// <summary>
/// Gets or sets the transition which is used to animate the dialog.
/// </summary>
[CascadingParameter]
public ITransition? Transition { get; set; }
/// <inheritdoc />
[Parameter]
public RenderFragment<IDialog>? _ { get; set; }
/// <summary>
/// Gets or sets the content of the dialog.
/// </summary>
[Parameter]
public RenderFragment<IDialog>? ChildContent { get; set; }
/// <summary>
/// Gets or sets additional attributes that will be applied to the dialog.
/// </summary>
[Parameter(CaptureUnmatchedValues = true)]
public IEnumerable<KeyValuePair<string, object?>>? AdditionalAttributes
{
get => _attributes.AdditionalAttributes;
set => _attributes.AdditionalAttributes = value;
}
/// <inheritdoc />
public IDialogDescription? Description { get; private set; }
/// <inheritdoc />
public IDialogTitle? Title { get; private set; }
/// <inheritdoc />
public string Id { get; } = "ignis-hui-dialog-" + Guid.NewGuid().ToString("N");
/// <inheritdoc cref="IElementReferenceProvider.Element" />
public ElementReference? Element { get; set; }
/// <inheritdoc />
public object? Component { get; set; }
/// <inheritdoc />
public IEnumerable<KeyValuePair<string, object?>> Attributes => _attributes;
[Inject] internal FrameTracker FrameTracker { get; set; } = null!;
/// <summary>
/// Initializes a new instance of the <see cref="Dialog" /> class.
/// </summary>
public Dialog()
{
AsElement = "div";
_attributes = new AttributeCollection(new[]
{
() => new KeyValuePair<string, object?>("id", Id),
() => new KeyValuePair<string, object?>("role", "dialog"),
() => new KeyValuePair<string, object?>("aria-modal", "true"), () => new KeyValuePair<string, object?>(
"aria-labelledby", Title == null ? null : Title.Id ?? Id + "-title"),
() => new KeyValuePair<string, object?>("aria-describedby",
Description == null ? null : Description.Id ?? Id + "-description")
});
}
/// <inheritdoc />
protected override void OnInitialized()
{
Transition?.AddDialog(this);
base.OnInitialized();
}
/// <inheritdoc />
protected override void RegisterAsContentProvider()
{
if (Transition != null) return;
base.RegisterAsContentProvider();
}
/// <inheritdoc />
protected override void BuildRenderTree(RenderTreeBuilder builder)
{
// Always render the dialog if it's in a transition since the transition will be handled by DialogOutlet
if (Transition != null)
{
BuildContentRenderTree(builder);
return;
}
base.BuildRenderTree(builder);
}
/// <inheritdoc />
protected override void BuildContentRenderTree(RenderTreeBuilder builder)
{
if (!_isOpen) return;
builder.OpenAs(0, this);
builder.AddMultipleAttributes(1, Attributes!);
// ReSharper disable once VariableHidesOuterVariable
builder.AddContentFor(2, this, builder =>
{
builder.OpenComponent<CascadingValue<IDialog>>(3);
builder.AddAttribute(4, nameof(CascadingValue<IDialog>.IsFixed), true);
builder.AddAttribute(5, nameof(CascadingValue<IDialog>.Value), this);
builder.AddAttribute(6, nameof(CascadingValue<IDialog>.ChildContent), this.GetChildContent(ChildContent));
builder.CloseComponent();
});
builder.CloseAs(this);
}
/// <inheritdoc />
public void Open(Action? continueWith = null)
{
if (_isOpen || FrameTracker.IsPending)
{
if (_isOpen) continueWith?.Invoke();
return;
}
var __ = IsOpenChanged.InvokeAsync(_isOpen = true);
if (continueWith != null) FrameTracker.ExecuteOnNextFrame(this, continueWith);
Update();
}
/// <inheritdoc />
public void Close(Action? continueWith = null)
{
if (!_isOpen || FrameTracker.IsPending)
{
if (!_isOpen) continueWith?.Invoke();
return;
}
if (Transition != null)
{
Transition.Hide(() => CloseCore(continueWith, true));
return;
}
CloseCore(continueWith);
}
private void CloseCore(Action? continueWith, bool async = false)
{
var __ = IsOpenChanged.InvokeAsync(_isOpen = false);
if (continueWith != null) FrameTracker.ExecuteOnNextFrame(this, continueWith);
Update(async);
}
/// <inheritdoc />
public void SetTitle(IDialogTitle title)
{
Title = title ?? throw new ArgumentNullException(nameof(title));
}
/// <inheritdoc />
public void SetDescription(IDialogDescription description)
{
Description = description ?? throw new ArgumentNullException(nameof(description));
}
/// <inheritdoc />
public void CloseFromTransition(Action? continueWith = null)
{
CloseCore(continueWith, true);
}
/// <inheritdoc />
public Task OnAfterRenderAsync()
{
FrameTracker.OnAfterRender();
return Task.CompletedTask;
}
/// <inheritdoc />
protected override void Dispose(bool disposing)
{
if (disposing)
{
Transition?.RemoveDialog(this);
}
base.Dispose(disposing);
}
}