Implement INotificationManager

Dalamud/Interface/ImGuiNotification/IActiveNotification.cs

@@ -0,0 +1,109 @@
+using System.Threading;
+
+namespace Dalamud.Interface.ImGuiNotification;
+
+/// <summary>
+/// Represents an active notification.
+/// </summary>
+public interface IActiveNotification : INotification
+{
+    /// <summary>
+    /// The counter for <see cref="Id"/> field.
+    /// </summary>
+    private static long idCounter;
+
+    /// <summary>
+    /// Invoked upon dismissing the notification.
+    /// </summary>
+    /// <remarks>
+    /// The event callback will not be called, if a user interacts with the notification after the plugin is unloaded.
+    /// </remarks>
+    event NotificationDismissedDelegate Dismiss;
+
+    /// <summary>
+    /// Invoked upon clicking on the notification.
+    /// </summary>
+    /// <remarks>
+    /// This event is not applicable when <see cref="INotification.Interactible"/> is set to <c>false</c>.
+    /// Note that this function may be called even after <see cref="Dismiss"/> has been invoked.
+    /// Refer to <see cref="IsDismissed"/>.
+    /// </remarks>
+    event Action<IActiveNotification> Click;
+
+    /// <summary>
+    /// Invoked when the mouse enters the notification window.
+    /// </summary>
+    /// <remarks>
+    /// This event is applicable regardless of <see cref="INotification.Interactible"/>.
+    /// Note that this function may be called even after <see cref="Dismiss"/> has been invoked.
+    /// Refer to <see cref="IsDismissed"/>.
+    /// </remarks>
+    event Action<IActiveNotification> MouseEnter;
+
+    /// <summary>
+    /// Invoked when the mouse leaves the notification window.
+    /// </summary>
+    /// <remarks>
+    /// This event is applicable regardless of <see cref="INotification.Interactible"/>.
+    /// Note that this function may be called even after <see cref="Dismiss"/> has been invoked.
+    /// Refer to <see cref="IsDismissed"/>.
+    /// </remarks>
+    event Action<IActiveNotification> MouseLeave;
+
+    /// <summary>
+    /// Invoked upon drawing the action bar of the notification.
+    /// </summary>
+    /// <remarks>
+    /// This event is applicable regardless of <see cref="INotification.Interactible"/>.
+    /// Note that this function may be called even after <see cref="Dismiss"/> has been invoked.
+    /// Refer to <see cref="IsDismissed"/>.
+    /// </remarks>
+    event Action<IActiveNotification> DrawActions;
+
+    /// <summary>
+    /// Gets the ID of this notification.
+    /// </summary>
+    long Id { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether the mouse cursor is on the notification window.
+    /// </summary>
+    bool IsMouseHovered { get; }
+
+    /// <summary>
+    /// Gets a value indicating whether the notification has been dismissed.
+    /// This includes when the hide animation is being played.
+    /// </summary>
+    bool IsDismissed { get; }
+
+    /// <summary>
+    /// Clones this notification as a <see cref="Notification"/>.
+    /// </summary>
+    /// <returns>A new instance of <see cref="Notification"/>.</returns>
+    Notification CloneNotification();
+
+    /// <summary>
+    /// Dismisses this notification.
+    /// </summary>
+    void DismissNow();
+
+    /// <summary>
+    /// Updates the notification data.
+    /// </summary>
+    /// <remarks>
+    /// Call <see cref="UpdateIcon"/> to update the icon using the new <see cref="INotification.IconCreator"/>.
+    /// </remarks>
+    /// <param name="newNotification">The new notification entry.</param>
+    void Update(INotification newNotification);
+
+    /// <summary>
+    /// Loads the icon again using <see cref="INotification.IconCreator"/>.
+    /// </summary>
+    void UpdateIcon();
+
+    /// <summary>
+    /// Generates a new value to use for <see cref="Id"/>.
+    /// </summary>
+    /// <returns>The new value.</returns>
+    internal static long CreateNewId() => Interlocked.Increment(ref idCounter);
+}

Dalamud/Interface/ImGuiNotification/INotification.cs

@@ -0,0 +1,75 @@
+using System.Threading.Tasks;
+
+using Dalamud.Game.Text;
+using Dalamud.Interface.Internal;
+using Dalamud.Interface.Internal.Notifications;
+
+namespace Dalamud.Interface.ImGuiNotification;
+
+/// <summary>
+/// Represents a notification.
+/// </summary>
+public interface INotification
+{
+    /// <summary>
+    /// Gets the content body of the notification.
+    /// </summary>
+    string Content { get; }
+
+    /// <summary>
+    /// Gets the title of the notification.
+    /// </summary>
+    string? Title { get; }
+
+    /// <summary>
+    /// Gets the type of the notification.
+    /// </summary>
+    NotificationType Type { get; }
+
+    /// <summary>
+    /// Gets the icon creator function for the notification.<br />
+    /// Currently <see cref="IDalamudTextureWrap"/>, <see cref="SeIconChar"/>, and <see cref="FontAwesomeIcon"/> types
+    /// are accepted.
+    /// </summary>
+    /// <remarks>
+    /// The icon created by the task returned will be owned by Dalamud,
+    /// i.e. it will be <see cref="IDisposable.Dispose"/>d automatically as needed.<br />
+    /// If <c>null</c> is supplied for this property or <see cref="Task.IsCompletedSuccessfully"/> of the returned task
+    /// is <c>false</c>, then the corresponding icon with <see cref="Type"/> will be used.<br />
+    /// Use <see cref="Task.FromResult{TResult}"/> if you have an instance of <see cref="IDalamudTextureWrap"/> that you
+    /// can transfer ownership to Dalamud and is available for use right away.
+    /// </remarks>
+    Func<Task<object>>? IconCreator { get; }
+
+    /// <summary>
+    /// Gets the expiry.
+    /// </summary>
+    DateTime Expiry { get; }
+    
+    /// <summary>
+    /// Gets a value indicating whether this notification may be interacted.
+    /// </summary>
+    /// <remarks>
+    /// Set this value to <c>true</c> if you want to respond to user inputs from
+    /// <see cref="IActiveNotification.DrawActions"/>.
+    /// Note that the close buttons for notifications are always provided and interactible.
+    /// </remarks>
+    bool Interactible { get; }
+    
+    /// <summary>
+    /// Gets a value indicating whether clicking on the notification window counts as dismissing the notification.
+    /// </summary>
+    /// <remarks>
+    /// This property has no effect if <see cref="Interactible"/> is <c>false</c>.
+    /// </remarks>
+    bool ClickIsDismiss { get; }
+
+    /// <summary>
+    /// Gets the new duration for this notification if mouse cursor is on the notification window.
+    /// If set to <see cref="TimeSpan.Zero"/> or less, then this feature is turned off.
+    /// </summary>
+    /// <remarks>
+    /// This property is applicable regardless of <see cref="Interactible"/>.
+    /// </remarks>
+    TimeSpan HoverExtendDuration { get; }
+}

Dalamud/Interface/ImGuiNotification/Notification.cs

@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+
+using Dalamud.Interface.Internal.Notifications;
+
+namespace Dalamud.Interface.ImGuiNotification;
+
+/// <summary>
+/// Represents a blueprint for a notification.
+/// </summary>
+public sealed record Notification : INotification
+{
+    /// <inheritdoc/>
+    public string Content { get; set; } = string.Empty;
+
+    /// <inheritdoc/>
+    public string? Title { get; set; }
+
+    /// <inheritdoc/>
+    public NotificationType Type { get; set; } = NotificationType.None;
+
+    /// <inheritdoc/>
+    public Func<Task<object>>? IconCreator { get; set; }
+
+    /// <inheritdoc/>
+    public DateTime Expiry { get; set; } = DateTime.Now + NotificationConstants.DefaultDisplayDuration;
+
+    /// <inheritdoc/>
+    public bool Interactible { get; set; }
+
+    /// <inheritdoc/>
+    public bool ClickIsDismiss { get; set; } = true;
+
+    /// <inheritdoc/>
+    public TimeSpan HoverExtendDuration { get; set; } = NotificationConstants.DefaultHoverExtendDuration;
+}

Dalamud/Interface/ImGuiNotification/NotificationDismissReason.cs

@@ -0,0 +1,22 @@
+namespace Dalamud.Interface.ImGuiNotification;
+
+/// <summary>
+/// Specifies the reason of dismissal for a notification.
+/// </summary>
+public enum NotificationDismissReason
+{
+    /// <summary>
+    /// The notification is dismissed because the expiry specified from <see cref="INotification.Expiry"/> is met.
+    /// </summary>
+    Timeout = 1,
+    
+    /// <summary>
+    /// The notification is dismissed because the user clicked on the close button on a notification window.
+    /// </summary>
+    Manual = 2,
+    
+    /// <summary>
+    /// The notification is dismissed from calling <see cref="IActiveNotification.DismissNow"/>.
+    /// </summary>
+    Programmatical = 3,
+}

Dalamud/Interface/ImGuiNotification/NotificationDismissedDelegate.cs

@@ -0,0 +1,10 @@
+namespace Dalamud.Interface.ImGuiNotification;
+
+/// <summary>
+/// Delegate representing the dismissal of an active notification.
+/// </summary>
+/// <param name="notification">The notification being dismissed.</param>
+/// <param name="dismissReason">The reason of dismissal.</param>
+public delegate void NotificationDismissedDelegate(
+    IActiveNotification notification,
+    NotificationDismissReason dismissReason);

Dalamud/Interface/Internal/Notifications/ActiveNotification.cs

@@ -0,0 +1,508 @@
+using System.Numerics;
+using System.Runtime.Loader;
+using System.Threading.Tasks;
+
+using Dalamud.Game.Text;
+using Dalamud.Interface.Animation;
+using Dalamud.Interface.Animation.EasingFunctions;
+using Dalamud.Interface.Colors;
+using Dalamud.Interface.ImGuiNotification;
+using Dalamud.Interface.ManagedFontAtlas;
+using Dalamud.Interface.Utility;
+using Dalamud.Plugin.Internal.Types;
+using Dalamud.Utility;
+
+using ImGuiNET;
+
+using Serilog;
+
+namespace Dalamud.Interface.Internal.Notifications;
+
+/// <summary>
+/// Represents an active notification.
+/// </summary>
+internal sealed class ActiveNotification : IActiveNotification, IDisposable
+{
+    private readonly Easing showEasing;
+    private readonly Easing hideEasing;
+
+    private Notification underlyingNotification;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ActiveNotification"/> class.
+    /// </summary>
+    /// <param name="underlyingNotification">The underlying notification.</param>
+    /// <param name="initiatorPlugin">The initiator plugin. Use <c>null</c> if originated by Dalamud.</param>
+    public ActiveNotification(Notification underlyingNotification, LocalPlugin? initiatorPlugin)
+    {
+        this.underlyingNotification = underlyingNotification with { };
+        this.InitiatorPlugin = initiatorPlugin;
+        this.showEasing = new InCubic(NotificationConstants.ShowAnimationDuration);
+        this.hideEasing = new OutCubic(NotificationConstants.HideAnimationDuration);
+
+        this.showEasing.Start();
+    }
+
+    /// <inheritdoc/>
+    public event NotificationDismissedDelegate? Dismiss;
+
+    /// <inheritdoc/>
+    public event Action<IActiveNotification>? Click;
+
+    /// <inheritdoc/>
+    public event Action<IActiveNotification>? DrawActions;
+
+    /// <inheritdoc/>
+    public event Action<IActiveNotification>? MouseEnter;
+
+    /// <inheritdoc/>
+    public event Action<IActiveNotification>? MouseLeave;
+
+    /// <inheritdoc/>
+    public long Id { get; } = IActiveNotification.CreateNewId();
+
+    /// <summary>
+    /// Gets the tick of creating this notification.
+    /// </summary>
+    public long CreatedAt { get; } = Environment.TickCount64;
+
+    /// <inheritdoc/>
+    public string Content => this.underlyingNotification.Content;
+
+    /// <inheritdoc/>
+    public string? Title => this.underlyingNotification.Title;
+
+    /// <inheritdoc/>
+    public NotificationType Type => this.underlyingNotification.Type;
+
+    /// <inheritdoc/>
+    public Func<Task<object>>? IconCreator => this.underlyingNotification.IconCreator;
+
+    /// <inheritdoc/>
+    public DateTime Expiry => this.underlyingNotification.Expiry;
+
+    /// <inheritdoc/>
+    public bool Interactible => this.underlyingNotification.Interactible;
+
+    /// <inheritdoc/>
+    public bool ClickIsDismiss => this.underlyingNotification.ClickIsDismiss;
+
+    /// <inheritdoc/>
+    public TimeSpan HoverExtendDuration => this.underlyingNotification.HoverExtendDuration;
+
+    /// <inheritdoc/>
+    public bool IsMouseHovered { get; private set; }
+
+    /// <inheritdoc/>
+    public bool IsDismissed => this.hideEasing.IsRunning;
+
+    /// <summary>
+    /// Gets or sets the plugin that initiated this notification.
+    /// </summary>
+    public LocalPlugin? InitiatorPlugin { get; set; }
+
+    /// <summary>
+    /// Gets or sets the icon of this notification.
+    /// </summary>
+    public Task<object>? IconTask { get; set; }
+
+    /// <summary>
+    /// Gets the default color of the notification.
+    /// </summary>
+    private Vector4 DefaultIconColor => this.Type switch
+    {
+        NotificationType.None => ImGuiColors.DalamudWhite,
+        NotificationType.Success => ImGuiColors.HealerGreen,
+        NotificationType.Warning => ImGuiColors.DalamudOrange,
+        NotificationType.Error => ImGuiColors.DalamudRed,
+        NotificationType.Info => ImGuiColors.TankBlue,
+        _ => ImGuiColors.DalamudWhite,
+    };
+
+    /// <summary>
+    /// Gets the default icon of the notification.
+    /// </summary>
+    private string? DefaultIconString => this.Type switch
+    {
+        NotificationType.None => null,
+        NotificationType.Success => FontAwesomeIcon.CheckCircle.ToIconString(),
+        NotificationType.Warning => FontAwesomeIcon.ExclamationCircle.ToIconString(),
+        NotificationType.Error => FontAwesomeIcon.TimesCircle.ToIconString(),
+        NotificationType.Info => FontAwesomeIcon.InfoCircle.ToIconString(),
+        _ => null,
+    };
+
+    /// <summary>
+    /// Gets the default title of the notification.
+    /// </summary>
+    private string? DefaultTitle => this.Type switch
+    {
+        NotificationType.None => null,
+        NotificationType.Success => NotificationType.Success.ToString(),
+        NotificationType.Warning => NotificationType.Warning.ToString(),
+        NotificationType.Error => NotificationType.Error.ToString(),
+        NotificationType.Info => NotificationType.Info.ToString(),
+        _ => null,
+    };
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        this.ClearIconTask();
+        this.underlyingNotification.IconCreator = null;
+        this.Dismiss = null;
+        this.Click = null;
+        this.DrawActions = null;
+        this.InitiatorPlugin = null;
+    }
+
+    /// <inheritdoc/>
+    public Notification CloneNotification() => this.underlyingNotification with { };
+
+    /// <inheritdoc/>
+    public void DismissNow() => this.DismissNow(NotificationDismissReason.Programmatical);
+
+    /// <summary>
+    /// Dismisses this notification. Multiple calls will be ignored.
+    /// </summary>
+    /// <param name="reason">The reason of dismissal.</param>
+    public void DismissNow(NotificationDismissReason reason)
+    {
+        if (this.hideEasing.IsRunning)
+            return;
+
+        this.hideEasing.Start();
+        try
+        {
+            this.Dismiss?.Invoke(this, reason);
+        }
+        catch (Exception e)
+        {
+            Log.Error(
+                e,
+                $"{nameof(this.Dismiss)} error; notification is owned by {this.InitiatorPlugin?.Name ?? NotificationConstants.DefaultInitiator}");
+        }
+    }
+
+    /// <summary>
+    /// Updates animations.
+    /// </summary>
+    /// <returns><c>true</c> if the notification is over.</returns>
+    public bool UpdateAnimations()
+    {
+        this.showEasing.Update();
+        this.hideEasing.Update();
+        return this.hideEasing.IsRunning && this.hideEasing.IsDone;
+    }
+
+    /// <summary>
+    /// Draws this notification.
+    /// </summary>
+    /// <param name="maxWidth">The maximum width of the notification window.</param>
+    /// <param name="offsetY">The offset from the bottom.</param>
+    /// <returns>The height of the notification.</returns>
+    public float Draw(float maxWidth, float offsetY)
+    {
+        if (!this.IsDismissed
+            && DateTime.Now > this.Expiry
+            && (this.HoverExtendDuration <= TimeSpan.Zero || !this.IsMouseHovered))
+        {
+            this.DismissNow(NotificationDismissReason.Timeout);
+        }
+
+        var opacity =
+            Math.Clamp(
+                (float)(this.hideEasing.IsRunning
+                            ? (this.hideEasing.IsDone ? 0 : 1f - this.hideEasing.Value)
+                            : (this.showEasing.IsDone ? 1 : this.showEasing.Value)),
+                0f,
+                1f);
+        if (opacity <= 0)
+            return 0;
+
+        var notificationManager = Service<NotificationManager>.Get();
+        var interfaceManager = Service<InterfaceManager>.Get();
+        var unboundedWidth = NotificationConstants.ScaledWindowPadding * 3;
+        unboundedWidth += NotificationConstants.ScaledIconSize;
+        unboundedWidth += Math.Max(
+            ImGui.CalcTextSize(this.Title ?? this.DefaultTitle ?? string.Empty).X,
+            ImGui.CalcTextSize(this.Content).X);
+
+        var width = Math.Min(maxWidth, unboundedWidth);
+
+        var viewport = ImGuiHelpers.MainViewport;
+        var viewportPos = viewport.WorkPos;
+        var viewportSize = viewport.WorkSize;
+
+        ImGuiHelpers.ForceNextWindowMainViewport();
+        ImGui.SetNextWindowPos(
+            (viewportPos + viewportSize) -
+            new Vector2(NotificationConstants.ScaledViewportEdgeMargin) -
+            new Vector2(0, offsetY),
+            ImGuiCond.Always,
+            Vector2.One);
+        ImGui.SetNextWindowSizeConstraints(new(width, 0), new(width, float.MaxValue));
+        ImGui.PushID(this.Id.GetHashCode());
+        ImGui.PushStyleVar(ImGuiStyleVar.WindowPadding, new Vector2(NotificationConstants.ScaledWindowPadding));
+        ImGui.PushStyleVar(ImGuiStyleVar.Alpha, opacity);
+        unsafe
+        {
+            ImGui.PushStyleColor(
+                ImGuiCol.WindowBg,
+                *ImGui.GetStyleColorVec4(ImGuiCol.WindowBg) * new Vector4(
+                    1f,
+                    1f,
+                    1f,
+                    NotificationConstants.BackgroundOpacity));
+        }
+
+        ImGui.Begin(
+            $"##NotifyWindow{this.Id}",
+            ImGuiWindowFlags.AlwaysAutoResize |
+            ImGuiWindowFlags.NoDecoration |
+            (this.Interactible ? ImGuiWindowFlags.None : ImGuiWindowFlags.NoInputs) |
+            ImGuiWindowFlags.NoNav |
+            ImGuiWindowFlags.NoBringToFrontOnFocus |
+            ImGuiWindowFlags.NoFocusOnAppearing);
+
+        var basePos = ImGui.GetCursorPos();
+        this.DrawIcon(
+            notificationManager,
+            basePos,
+            basePos + new Vector2(NotificationConstants.ScaledIconSize));
+        basePos.X += NotificationConstants.ScaledIconSize + NotificationConstants.ScaledWindowPadding;
+        width -= NotificationConstants.ScaledIconSize + (NotificationConstants.ScaledWindowPadding * 2);
+        this.DrawTitle(basePos, basePos + new Vector2(width, 0));
+        basePos.Y = ImGui.GetCursorPosY();
+        this.DrawContentBody(basePos, basePos + new Vector2(width, 0));
+        if (ImGui.IsWindowHovered() && ImGui.IsMouseClicked(ImGuiMouseButton.Left))
+        {
+            this.Click?.InvokeSafely(this);
+            if (this.ClickIsDismiss)
+                this.DismissNow(NotificationDismissReason.Manual);
+        }
+
+        var windowPos = ImGui.GetWindowPos();
+        var windowSize = ImGui.GetWindowSize();
+
+        ImGui.End();
+
+        if (!this.IsDismissed)
+            this.DrawCloseButton(interfaceManager, windowPos);
+
+        ImGui.PopStyleColor();
+        ImGui.PopStyleVar(2);
+        ImGui.PopID();
+
+        if (windowPos.X <= ImGui.GetIO().MousePos.X
+            && windowPos.Y <= ImGui.GetIO().MousePos.Y
+            && ImGui.GetIO().MousePos.X < windowPos.X + windowSize.X
+            && ImGui.GetIO().MousePos.Y < windowPos.Y + windowSize.Y)
+        {
+            if (!this.IsMouseHovered)
+            {
+                this.IsMouseHovered = true;
+                this.MouseEnter.InvokeSafely(this);
+            }
+        }
+        else if (this.IsMouseHovered)
+        {
+            if (this.HoverExtendDuration > TimeSpan.Zero)
+            {
+                var newExpiry = DateTime.Now + this.HoverExtendDuration;
+                if (newExpiry > this.Expiry)
+                    this.underlyingNotification.Expiry = newExpiry;
+            }
+
+            this.IsMouseHovered = false;
+            this.MouseLeave.InvokeSafely(this);
+        }
+
+        return windowSize.Y;
+    }
+
+    /// <inheritdoc/>
+    public void Update(INotification newNotification)
+    {
+        this.underlyingNotification.Content = newNotification.Content;
+        this.underlyingNotification.Title = newNotification.Title;
+        this.underlyingNotification.Type = newNotification.Type;
+        this.underlyingNotification.IconCreator = newNotification.IconCreator;
+        this.underlyingNotification.Expiry = newNotification.Expiry;
+    }
+
+    /// <inheritdoc/>
+    public void UpdateIcon()
+    {
+        this.ClearIconTask();
+        this.IconTask = this.IconCreator?.Invoke();
+    }
+
+    /// <summary>
+    /// Removes non-Dalamud invocation targets from events.
+    /// </summary>
+    public void RemoveNonDalamudInvocations()
+    {
+        var dalamudContext = AssemblyLoadContext.GetLoadContext(typeof(NotificationManager).Assembly);
+        this.Dismiss = RemoveNonDalamudInvocationsCore(this.Dismiss);
+        this.Click = RemoveNonDalamudInvocationsCore(this.Click);
+        this.DrawActions = RemoveNonDalamudInvocationsCore(this.DrawActions);
+        this.MouseEnter = RemoveNonDalamudInvocationsCore(this.MouseEnter);
+        this.MouseLeave = RemoveNonDalamudInvocationsCore(this.MouseLeave);
+
+        return;
+
+        T? RemoveNonDalamudInvocationsCore<T>(T? @delegate) where T : Delegate
+        {
+            if (@delegate is null)
+                return null;
+
+            foreach (var il in @delegate.GetInvocationList())
+            {
+                if (il.Target is { } target &&
+                    AssemblyLoadContext.GetLoadContext(target.GetType().Assembly) != dalamudContext)
+                {
+                    @delegate = (T)Delegate.Remove(@delegate, il);
+                }
+            }
+
+            return @delegate;
+        }
+    }
+
+    private void ClearIconTask()
+    {
+        _ = this.IconTask?.ContinueWith(
+            r =>
+            {
+                if (r.IsCompletedSuccessfully && r.Result is IDisposable d)
+                    d.Dispose();
+            });
+        this.IconTask = null;
+    }
+
+    private void DrawIcon(NotificationManager notificationManager, Vector2 minCoord, Vector2 maxCoord)
+    {
+        string? iconString;
+        IFontHandle? fontHandle;
+        switch (this.IconTask?.IsCompletedSuccessfully is true ? this.IconTask.Result : null)
+        {
+            case IDalamudTextureWrap wrap:
+            {
+                var size = wrap.Size;
+                if (size.X > maxCoord.X - minCoord.X)
+                    size *= (maxCoord.X - minCoord.X) / size.X;
+                if (size.Y > maxCoord.Y - minCoord.Y)
+                    size *= (maxCoord.Y - minCoord.Y) / size.Y;
+                var pos = ((minCoord + maxCoord) - size) / 2;
+                ImGui.SetCursorPos(pos);
+                ImGui.Image(wrap.ImGuiHandle, size);
+                return;
+            }
+
+            case SeIconChar icon:
+                iconString = string.Empty + (char)icon;
+                fontHandle = notificationManager.IconAxisFontHandle;
+                break;
+            case FontAwesomeIcon icon:
+                iconString = icon.ToIconString();
+                fontHandle = notificationManager.IconFontAwesomeFontHandle;
+                break;
+            default:
+                iconString = this.DefaultIconString;
+                fontHandle = notificationManager.IconFontAwesomeFontHandle;
+                break;
+        }
+
+        if (string.IsNullOrWhiteSpace(iconString))
+            return;
+
+        using (fontHandle.Push())
+        {
+            var size = ImGui.CalcTextSize(iconString);
+            var pos = ((minCoord + maxCoord) - size) / 2;
+            ImGui.SetCursorPos(pos);
+            ImGui.PushStyleColor(ImGuiCol.Text, this.DefaultIconColor);
+            ImGui.TextUnformatted(iconString);
+            ImGui.PopStyleColor();
+        }
+    }
+
+    private void DrawTitle(Vector2 minCoord, Vector2 maxCoord)
+    {
+        ImGui.PushTextWrapPos(maxCoord.X);
+
+        if ((this.Title ?? this.DefaultTitle) is { } title)
+        {
+            ImGui.PushStyleColor(ImGuiCol.Text, NotificationConstants.TitleTextColor);
+            ImGui.SetCursorPos(minCoord);
+            ImGui.TextUnformatted(title);
+            ImGui.PopStyleColor();
+        }
+
+        ImGui.PushStyleColor(ImGuiCol.Text, NotificationConstants.BlameTextColor);
+        ImGui.SetCursorPos(minCoord with { Y = ImGui.GetCursorPosY() });
+        ImGui.TextUnformatted(this.InitiatorPlugin?.Name ?? NotificationConstants.DefaultInitiator);
+        ImGui.PopStyleColor();
+
+        ImGui.PopTextWrapPos();
+        ImGui.SetCursorPosY(ImGui.GetCursorPosY() + NotificationConstants.ScaledComponentGap);
+    }
+
+    private void DrawCloseButton(InterfaceManager interfaceManager, Vector2 screenCoord)
+    {
+        using (interfaceManager.IconFontHandle?.Push())
+        {
+            var str = FontAwesomeIcon.Times.ToIconString();
+            var size = NotificationConstants.ScaledCloseButtonMinSize;
+            var textSize = ImGui.CalcTextSize(str);
+            size = Math.Max(size, Math.Max(textSize.X, textSize.Y));
+            ImGui.PushStyleVar(ImGuiStyleVar.FramePadding, Vector2.Zero);
+            ImGui.PushStyleVar(ImGuiStyleVar.FrameRounding, 0f);
+            ImGui.PushStyleVar(ImGuiStyleVar.WindowPadding, Vector2.Zero);
+            ImGui.PushStyleVar(ImGuiStyleVar.WindowRounding, 0f);
+            ImGui.PushStyleColor(ImGuiCol.Button, 0);
+            ImGui.PushStyleColor(ImGuiCol.Text, NotificationConstants.CloseTextColor);
+
+            // ImGuiHelpers.ForceNextWindowMainViewport();
+            ImGui.SetNextWindowPos(screenCoord, ImGuiCond.Always, new(1, 0));
+            ImGui.SetNextWindowSizeConstraints(new(size), new(size));
+            ImGui.Begin(
+                $"##CloseButtonWindow{this.Id}",
+                ImGuiWindowFlags.AlwaysAutoResize |
+                ImGuiWindowFlags.NoDecoration |
+                ImGuiWindowFlags.NoNav |
+                ImGuiWindowFlags.NoBringToFrontOnFocus |
+                ImGuiWindowFlags.NoFocusOnAppearing);
+
+            if (ImGui.Button(str, new(size)))
+                this.DismissNow();
+
+            ImGui.End();
+            ImGui.PopStyleColor(2);
+            ImGui.PopStyleVar(4);
+        }
+    }
+
+    private void DrawContentBody(Vector2 minCoord, Vector2 maxCoord)
+    {
+        ImGui.SetCursorPos(minCoord);
+        ImGui.PushTextWrapPos(maxCoord.X);
+        ImGui.PushStyleColor(ImGuiCol.Text, NotificationConstants.BodyTextColor);
+        ImGui.TextUnformatted(this.Content);
+        ImGui.PopStyleColor();
+        ImGui.PopTextWrapPos();
+        if (this.DrawActions is not null)
+        {
+            ImGui.SetCursorPosY(ImGui.GetCursorPosY() + NotificationConstants.ScaledComponentGap);
+            try
+            {
+                this.DrawActions.Invoke(this);
+            }
+            catch
+            {
+                // ignore
+            }
+        }
+    }
+}

Dalamud/Interface/Internal/Notifications/NotificationConstants.cs

@@ -0,0 +1,74 @@
+using System.Numerics;
+
+using Dalamud.Interface.Utility;
+
+namespace Dalamud.Interface.Internal.Notifications;
+
+/// <summary>
+/// Constants for drawing notification windows.
+/// </summary>
+internal static class NotificationConstants
+{
+    // ..............................[X]
+    // ..[i]..title title title title ..
+    // ..     by this_plugin          ..
+    // ..                             ..
+    // ..     body body body body     ..
+    // ..     some more wrapped body  ..
+    // ..                             ..
+    // ..     action buttons          ..
+    // .................................
+
+    /// <summary>The string to show in place of this_plugin if the notification is shown by Dalamud.</summary>
+    public const string DefaultInitiator = "Dalamud";
+
+    /// <summary>The size of the icon.</summary>
+    public const float IconSize = 32;
+
+    /// <summary>The background opacity of a notification window.</summary>
+    public const float BackgroundOpacity = 0.82f;
+
+    /// <summary>Duration of show animation.</summary>
+    public static readonly TimeSpan ShowAnimationDuration = TimeSpan.FromMilliseconds(300);
+
+    /// <summary>Default duration of the notification.</summary>
+    public static readonly TimeSpan DefaultDisplayDuration = TimeSpan.FromSeconds(3);
+
+    /// <summary>Default duration of the notification.</summary>
+    public static readonly TimeSpan DefaultHoverExtendDuration = TimeSpan.FromSeconds(3);
+
+    /// <summary>Duration of hide animation.</summary>
+    public static readonly TimeSpan HideAnimationDuration = TimeSpan.FromMilliseconds(300);
+
+    /// <summary>Text color for the close button [X].</summary>
+    public static readonly Vector4 CloseTextColor = new(0.8f, 0.8f, 0.8f, 1f);
+
+    /// <summary>Text color for the title.</summary>
+    public static readonly Vector4 TitleTextColor = new(1f, 1f, 1f, 1f);
+
+    /// <summary>Text color for the name of the initiator.</summary>
+    public static readonly Vector4 BlameTextColor = new(0.8f, 0.8f, 0.8f, 1f);
+
+    /// <summary>Text color for the body.</summary>
+    public static readonly Vector4 BodyTextColor = new(0.9f, 0.9f, 0.9f, 1f);
+
+    /// <summary>Gets the scaled padding of the window (dot(.) in the above diagram).</summary>
+    public static float ScaledWindowPadding => MathF.Round(16 * ImGuiHelpers.GlobalScale);
+
+    /// <summary>Gets the distance from the right bottom border of the viewport
+    /// to the right bottom border of a notification window.
+    /// </summary>
+    public static float ScaledViewportEdgeMargin => MathF.Round(20 * ImGuiHelpers.GlobalScale);
+
+    /// <summary>Gets the scaled gap between two notification windows.</summary>
+    public static float ScaledWindowGap => MathF.Round(10 * ImGuiHelpers.GlobalScale);
+
+    /// <summary>Gets the scaled gap between components.</summary>
+    public static float ScaledComponentGap => MathF.Round(5 * ImGuiHelpers.GlobalScale);
+
+    /// <summary>Gets the scaled size of the icon.</summary>
+    public static float ScaledIconSize => MathF.Round(IconSize * ImGuiHelpers.GlobalScale);
+    
+    /// <summary>Gets the scaled size of the close button.</summary>
+    public static float ScaledCloseButtonMinSize => MathF.Round(16 * ImGuiHelpers.GlobalScale);    
+}

Dalamud/Interface/Internal/Notifications/NotificationManager.cs

@@ -1,12 +1,15 @@
-using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
-using System.Linq;
-using System.Numerics;
 
-using Dalamud.Interface.Colors;
+using Dalamud.Interface.GameFonts;
+using Dalamud.Interface.ImGuiNotification;
+using Dalamud.Interface.ManagedFontAtlas;
+using Dalamud.Interface.ManagedFontAtlas.Internals;
 using Dalamud.Interface.Utility;
-using Dalamud.Utility;
-using ImGuiNET;
+using Dalamud.IoC;
+using Dalamud.IoC.Internal;
+using Dalamud.Plugin.Internal.Types;
+using Dalamud.Plugin.Services;
 
 namespace Dalamud.Interface.Internal.Notifications;
 
@@ -14,51 +17,66 @@ namespace Dalamud.Interface.Internal.Notifications;
 /// Class handling notifications/toasts in ImGui.
 /// Ported from https://github.com/patrickcjk/imgui-notify.
 /// </summary>
+[InterfaceVersion("1.0")]
 [ServiceManager.EarlyLoadedService]
-internal class NotificationManager : IServiceType
+internal class NotificationManager : INotificationManager, IServiceType, IDisposable
 {
-    /// <summary>
-    /// Value indicating the bottom-left X padding.
-    /// </summary>
-    internal const float NotifyPaddingX = 20.0f;
-
-    /// <summary>
-    /// Value indicating the bottom-left Y padding.
-    /// </summary>
-    internal const float NotifyPaddingY = 20.0f;
-
-    /// <summary>
-    /// Value indicating the Y padding between each message.
-    /// </summary>
-    internal const float NotifyPaddingMessageY = 10.0f;
-
-    /// <summary>
-    /// Value indicating the fade-in and out duration.
-    /// </summary>
-    internal const int NotifyFadeInOutTime = 500;
-
-    /// <summary>
-    /// Value indicating the default time until the notification is dismissed.
-    /// </summary>
-    internal const int NotifyDefaultDismiss = 3000;
-
-    /// <summary>
-    /// Value indicating the maximum opacity.
-    /// </summary>
-    internal const float NotifyOpacity = 0.82f;
-
-    /// <summary>
-    /// Value indicating default window flags for the notifications.
-    /// </summary>
-    internal const ImGuiWindowFlags NotifyToastFlags =
-        ImGuiWindowFlags.AlwaysAutoResize | ImGuiWindowFlags.NoDecoration | ImGuiWindowFlags.NoInputs |
-        ImGuiWindowFlags.NoNav | ImGuiWindowFlags.NoBringToFrontOnFocus | ImGuiWindowFlags.NoFocusOnAppearing;
-
-    private readonly List<Notification> notifications = new();
+    private readonly List<ActiveNotification> notifications = new();
+    private readonly ConcurrentBag<ActiveNotification> pendingNotifications = new();
 
     [ServiceManager.ServiceConstructor]
-    private NotificationManager()
+    private NotificationManager(FontAtlasFactory fontAtlasFactory)
     {
+        this.PrivateAtlas = fontAtlasFactory.CreateFontAtlas(
+            nameof(NotificationManager),
+            FontAtlasAutoRebuildMode.Async);
+        this.IconAxisFontHandle =
+            this.PrivateAtlas.NewGameFontHandle(new(GameFontFamily.Axis, NotificationConstants.IconSize));
+        this.IconFontAwesomeFontHandle =
+            this.PrivateAtlas.NewDelegateFontHandle(
+                e => e.OnPreBuild(
+                    tk => tk.AddFontAwesomeIconFont(new() { SizePx = NotificationConstants.IconSize })));
+    }
+
+    /// <summary>Gets the handle to AXIS fonts, sized for use as an icon.</summary>
+    public IFontHandle IconAxisFontHandle { get; }
+
+    /// <summary>Gets the handle to FontAwesome fonts, sized for use as an icon.</summary>
+    public IFontHandle IconFontAwesomeFontHandle { get; }
+
+    private IFontAtlas PrivateAtlas { get; }
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        this.PrivateAtlas.Dispose();
+        foreach (var n in this.pendingNotifications)
+            n.Dispose();
+        foreach (var n in this.notifications)
+            n.Dispose();
+        this.pendingNotifications.Clear();
+        this.notifications.Clear();
+    }
+
+    /// <inheritdoc/>
+    public IActiveNotification AddNotification(Notification notification)
+    {
+        var an = new ActiveNotification(notification, null);
+        this.pendingNotifications.Add(an);
+        return an;
+    }
+
+    /// <summary>
+    /// Adds a notification originating from a plugin.
+    /// </summary>
+    /// <param name="notification">The notification.</param>
+    /// <param name="plugin">The source plugin.</param>
+    /// <returns>The new notification.</returns>
+    public IActiveNotification AddNotification(Notification notification, LocalPlugin plugin)
+    {
+        var an = new ActiveNotification(notification, plugin);
+        this.pendingNotifications.Add(an);
+        return an;
     }
 
     /// <summary>
@@ -67,252 +85,77 @@ internal class NotificationManager : IServiceType
     /// <param name="content">The content of the notification.</param>
     /// <param name="title">The title of the notification.</param>
     /// <param name="type">The type of the notification.</param>
-    /// <param name="msDelay">The time the notification should be displayed for.</param>
-    public void AddNotification(string content, string? title = null, NotificationType type = NotificationType.None, uint msDelay = NotifyDefaultDismiss)
-    {
-        this.notifications.Add(new Notification
-        {
-            Content = content,
-            Title = title,
-            NotificationType = type,
-            DurationMs = msDelay,
-        });
-    }
+    public void AddNotification(
+        string content,
+        string? title = null,
+        NotificationType type = NotificationType.None) =>
+        this.AddNotification(
+            new()
+            {
+                Content = content,
+                Title = title,
+                Type = type,
+            });
 
     /// <summary>
     /// Draw all currently queued notifications.
     /// </summary>
     public void Draw()
     {
-        var viewportSize = ImGuiHelpers.MainViewport.Size;
+        var viewportSize = ImGuiHelpers.MainViewport.WorkSize;
         var height = 0f;
 
-        for (var i = 0; i < this.notifications.Count; i++)
-        {
-            var tn = this.notifications.ElementAt(i);
+        while (this.pendingNotifications.TryTake(out var newNotification))
+            this.notifications.Add(newNotification);
 
-            if (tn.GetPhase() == Notification.Phase.Expired)
-            {
-                this.notifications.RemoveAt(i);
-                continue;
-            }
+        var maxWidth = Math.Max(320 * ImGuiHelpers.GlobalScale, viewportSize.X / 3);
 
-            var opacity = tn.GetFadePercent();
+        this.notifications.RemoveAll(x => x.UpdateAnimations());
+        foreach (var tn in this.notifications)
+            height += tn.Draw(maxWidth, height) + NotificationConstants.ScaledWindowGap;
+    }
+}
 
-            var iconColor = tn.Color;
-            iconColor.W = opacity;
+/// <summary>
+/// Plugin-scoped version of a <see cref="NotificationManager"/> service.
+/// </summary>
+[PluginInterface]
+[InterfaceVersion("1.0")]
+[ServiceManager.ScopedService]
+#pragma warning disable SA1015
+[ResolveVia<INotificationManager>]
+#pragma warning restore SA1015
+internal class NotificationManagerPluginScoped : INotificationManager, IServiceType, IDisposable
+{
+    private readonly LocalPlugin localPlugin;
+    private readonly ConcurrentDictionary<IActiveNotification, int> notifications = new();
 
-            var windowName = $"##NOTIFY{i}";
+    [ServiceManager.ServiceDependency]
+    private readonly NotificationManager notificationManagerService = Service<NotificationManager>.Get();
 
-            ImGuiHelpers.ForceNextWindowMainViewport();
-            ImGui.SetNextWindowBgAlpha(opacity);
-            ImGui.SetNextWindowPos(ImGuiHelpers.MainViewport.Pos + new Vector2(viewportSize.X - NotifyPaddingX, viewportSize.Y - NotifyPaddingY - height), ImGuiCond.Always, Vector2.One);
-            ImGui.Begin(windowName, NotifyToastFlags);
+    [ServiceManager.ServiceConstructor]
+    private NotificationManagerPluginScoped(LocalPlugin localPlugin) =>
+        this.localPlugin = localPlugin;
 
-            ImGui.PushTextWrapPos(viewportSize.X / 3.0f);
-
-            var wasTitleRendered = false;
-
-            if (!tn.Icon.IsNullOrEmpty())
-            {
-                wasTitleRendered = true;
-                ImGui.PushFont(InterfaceManager.IconFont);
-                ImGui.TextColored(iconColor, tn.Icon);
-                ImGui.PopFont();
-            }
-
-            var textColor = ImGuiColors.DalamudWhite;
-            textColor.W = opacity;
-
-            ImGui.PushStyleColor(ImGuiCol.Text, textColor);
-
-            if (!tn.Title.IsNullOrEmpty())
-            {
-                if (!tn.Icon.IsNullOrEmpty())
-                {
-                    ImGui.SameLine();
-                }
-
-                ImGui.TextUnformatted(tn.Title);
-                wasTitleRendered = true;
-            }
-            else if (!tn.DefaultTitle.IsNullOrEmpty())
-            {
-                if (!tn.Icon.IsNullOrEmpty())
-                {
-                    ImGui.SameLine();
-                }
-
-                ImGui.TextUnformatted(tn.DefaultTitle);
-                wasTitleRendered = true;
-            }
-
-            if (wasTitleRendered && !tn.Content.IsNullOrEmpty())
-            {
-                ImGui.SetCursorPosY(ImGui.GetCursorPosY() + 5.0f);
-            }
-
-            if (!tn.Content.IsNullOrEmpty())
-            {
-                if (wasTitleRendered)
-                {
-                    ImGui.Separator();
-                }
-
-                ImGui.TextUnformatted(tn.Content);
-            }
-
-            ImGui.PopStyleColor();
-
-            ImGui.PopTextWrapPos();
-
-            height += ImGui.GetWindowHeight() + NotifyPaddingMessageY;
-
-            ImGui.End();
-        }
+    /// <inheritdoc/>
+    public IActiveNotification AddNotification(Notification notification)
+    {
+        var an = this.notificationManagerService.AddNotification(notification, this.localPlugin);
+        _ = this.notifications.TryAdd(an, 0);
+        an.Dismiss += (a, unused) => this.notifications.TryRemove(an, out _);
+        return an;
     }
 
-    /// <summary>
-    /// Container class for notifications.
-    /// </summary>
-    internal class Notification
+    /// <inheritdoc/>
+    public void Dispose()
     {
-        /// <summary>
-        /// Possible notification phases.
-        /// </summary>
-        internal enum Phase
+        while (!this.notifications.IsEmpty)
         {
-            /// <summary>
-            /// Phase indicating fade-in.
-            /// </summary>
-            FadeIn,
-
-            /// <summary>
-            /// Phase indicating waiting until fade-out.
-            /// </summary>
-            Wait,
-
-            /// <summary>
-            /// Phase indicating fade-out.
-            /// </summary>
-            FadeOut,
-
-            /// <summary>
-            /// Phase indicating that the notification has expired.
-            /// </summary>
-            Expired,
-        }
-
-        /// <summary>
-        /// Gets the type of the notification.
-        /// </summary>
-        internal NotificationType NotificationType { get; init; }
-
-        /// <summary>
-        /// Gets the title of the notification.
-        /// </summary>
-        internal string? Title { get; init; }
-
-        /// <summary>
-        /// Gets the content of the notification.
-        /// </summary>
-        internal string Content { get; init; }
-
-        /// <summary>
-        /// Gets the duration of the notification in milliseconds.
-        /// </summary>
-        internal uint DurationMs { get; init; }
-
-        /// <summary>
-        /// Gets the creation time of the notification.
-        /// </summary>
-        internal DateTime CreationTime { get; init; } = DateTime.Now;
-
-        /// <summary>
-        /// Gets the default color of the notification.
-        /// </summary>
-        /// <exception cref="ArgumentOutOfRangeException">Thrown when <see cref="NotificationType"/> is set to an out-of-range value.</exception>
-        internal Vector4 Color => this.NotificationType switch
-        {
-            NotificationType.None => ImGuiColors.DalamudWhite,
-            NotificationType.Success => ImGuiColors.HealerGreen,
-            NotificationType.Warning => ImGuiColors.DalamudOrange,
-            NotificationType.Error => ImGuiColors.DalamudRed,
-            NotificationType.Info => ImGuiColors.TankBlue,
-            _ => throw new ArgumentOutOfRangeException(),
-        };
-
-        /// <summary>
-        /// Gets the icon of the notification.
-        /// </summary>
-        /// <exception cref="ArgumentOutOfRangeException">Thrown when <see cref="NotificationType"/> is set to an out-of-range value.</exception>
-        internal string? Icon => this.NotificationType switch
-        {
-            NotificationType.None => null,
-            NotificationType.Success => FontAwesomeIcon.CheckCircle.ToIconString(),
-            NotificationType.Warning => FontAwesomeIcon.ExclamationCircle.ToIconString(),
-            NotificationType.Error => FontAwesomeIcon.TimesCircle.ToIconString(),
-            NotificationType.Info => FontAwesomeIcon.InfoCircle.ToIconString(),
-            _ => throw new ArgumentOutOfRangeException(),
-        };
-
-        /// <summary>
-        /// Gets the default title of the notification.
-        /// </summary>
-        /// <exception cref="ArgumentOutOfRangeException">Thrown when <see cref="NotificationType"/> is set to an out-of-range value.</exception>
-        internal string? DefaultTitle => this.NotificationType switch
-        {
-            NotificationType.None => null,
-            NotificationType.Success => NotificationType.Success.ToString(),
-            NotificationType.Warning => NotificationType.Warning.ToString(),
-            NotificationType.Error => NotificationType.Error.ToString(),
-            NotificationType.Info => NotificationType.Info.ToString(),
-            _ => throw new ArgumentOutOfRangeException(),
-        };
-
-        /// <summary>
-        /// Gets the elapsed time since creating the notification.
-        /// </summary>
-        internal TimeSpan ElapsedTime => DateTime.Now - this.CreationTime;
-
-        /// <summary>
-        /// Gets the phase of the notification.
-        /// </summary>
-        /// <returns>The phase of the notification.</returns>
-        internal Phase GetPhase()
-        {
-            var elapsed = (int)this.ElapsedTime.TotalMilliseconds;
-
-            if (elapsed > NotifyFadeInOutTime + this.DurationMs + NotifyFadeInOutTime)
-                return Phase.Expired;
-            else if (elapsed > NotifyFadeInOutTime + this.DurationMs)
-                return Phase.FadeOut;
-            else if (elapsed > NotifyFadeInOutTime)
-                return Phase.Wait;
-            else
-                return Phase.FadeIn;
-        }
-
-        /// <summary>
-        /// Gets the opacity of the notification.
-        /// </summary>
-        /// <returns>The opacity, in a range from 0 to 1.</returns>
-        internal float GetFadePercent()
-        {
-            var phase = this.GetPhase();
-            var elapsed = this.ElapsedTime.TotalMilliseconds;
-
-            if (phase == Phase.FadeIn)
+            foreach (var n in this.notifications.Keys)
             {
-                return (float)elapsed / NotifyFadeInOutTime * NotifyOpacity;
+                this.notifications.TryRemove(n, out _);
+                ((ActiveNotification)n).RemoveNonDalamudInvocations();
             }
-            else if (phase == Phase.FadeOut)
-            {
-                return (1.0f - (((float)elapsed - NotifyFadeInOutTime - this.DurationMs) /
-                                NotifyFadeInOutTime)) * NotifyOpacity;
-            }
-
-            return 1.0f * NotifyOpacity;
         }
     }
 }

Dalamud/Interface/Internal/Windows/Data/Widgets/ImGuiWidget.cs

@@ -44,32 +44,66 @@ internal class ImGuiWidget : IDataWindowWidget
 
         if (ImGui.Button("Add random notification"))
         {
-            var rand = new Random();
-
-            var title = rand.Next(0, 5) switch
-            {
-                0 => "This is a toast",
-                1 => "Truly, a toast",
-                2 => "I am testing this toast",
-                3 => "I hope this looks right",
-                4 => "Good stuff",
-                5 => "Nice",
-                _ => null,
-            };
-
-            var type = rand.Next(0, 4) switch
-            {
-                0 => NotificationType.Error,
-                1 => NotificationType.Warning,
-                2 => NotificationType.Info,
-                3 => NotificationType.Success,
-                4 => NotificationType.None,
-                _ => NotificationType.None,
-            };
-
             const string text = "Bla bla bla bla bla bla bla bla bla bla bla.\nBla bla bla bla bla bla bla bla bla bla bla bla bla bla.";
 
-            notifications.AddNotification(text, title, type);
+            NewRandom(out var title, out var type);
+            var n = notifications.AddNotification(
+                new()
+                {
+                    Content = text,
+                    Title = title,
+                    Type = type,
+                    Interactible = true,
+                    ClickIsDismiss = false,
+                });
+
+            var nclick = 0;
+            n.Click += _ => nclick++;
+            n.DrawActions += an =>
+            {
+                if (ImGui.Button("Update in place"))
+                {
+                    NewRandom(out title, out type);
+                    an.Update(an.CloneNotification() with { Title = title, Type = type });
+                }
+
+                if (an.IsMouseHovered)
+                {
+                    ImGui.SameLine();
+                    if (ImGui.Button("Dismiss"))
+                        an.DismissNow();
+                }
+
+                ImGui.AlignTextToFramePadding();
+                ImGui.SameLine();
+                ImGui.TextUnformatted($"Clicked {nclick} time(s)");
+            };
         }
     }
+
+    private static void NewRandom(out string? title, out NotificationType type)
+    {
+        var rand = new Random();
+
+        title = rand.Next(0, 5) switch
+        {
+            0 => "This is a toast",
+            1 => "Truly, a toast",
+            2 => "I am testing this toast",
+            3 => "I hope this looks right",
+            4 => "Good stuff",
+            5 => "Nice",
+            _ => null,
+        };
+
+        type = rand.Next(0, 4) switch
+        {
+            0 => NotificationType.Error,
+            1 => NotificationType.Warning,
+            2 => NotificationType.Info,
+            3 => NotificationType.Success,
+            4 => NotificationType.None,
+            _ => NotificationType.None,
+        };
+    }
 }

Dalamud/Interface/UiBuilder.cs

@@ -1,3 +1,4 @@
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Threading.Tasks;
@@ -9,12 +10,14 @@ using Dalamud.Game.ClientState.Conditions;
 using Dalamud.Game.Gui;
 using Dalamud.Interface.FontIdentifier;
 using Dalamud.Interface.GameFonts;
+using Dalamud.Interface.ImGuiNotification;
 using Dalamud.Interface.Internal;
 using Dalamud.Interface.Internal.ManagedAsserts;
 using Dalamud.Interface.Internal.Notifications;
 using Dalamud.Interface.ManagedFontAtlas;
 using Dalamud.Interface.ManagedFontAtlas.Internals;
 using Dalamud.Plugin.Internal.Types;
+using Dalamud.Plugin.Services;
 using Dalamud.Utility;
 using ImGuiNET;
 using ImGuiScene;
@@ -29,11 +32,13 @@ namespace Dalamud.Interface;
 /// </summary>
 public sealed class UiBuilder : IDisposable
 {
+    private readonly LocalPlugin localPlugin;
     private readonly Stopwatch stopwatch;
     private readonly HitchDetector hitchDetector;
     private readonly string namespaceName;
     private readonly InterfaceManager interfaceManager = Service<InterfaceManager>.Get();
     private readonly Framework framework = Service<Framework>.Get();
+    private readonly ConcurrentDictionary<IActiveNotification, int> notifications = new();
 
     [ServiceManager.ServiceDependency]
     private readonly DalamudConfiguration configuration = Service<DalamudConfiguration>.Get();
@@ -52,8 +57,10 @@ public sealed class UiBuilder : IDisposable
     /// You do not have to call this manually.
     /// </summary>
     /// <param name="namespaceName">The plugin namespace.</param>
-    internal UiBuilder(string namespaceName)
+    /// <param name="localPlugin">The relevant local plugin.</param>
+    internal UiBuilder(string namespaceName, LocalPlugin localPlugin)
     {
+        this.localPlugin = localPlugin;
         try
         {
             this.stopwatch = new Stopwatch();
@@ -556,22 +563,46 @@ public sealed class UiBuilder : IDisposable
     /// <param name="title">The title of the notification.</param>
     /// <param name="type">The type of the notification.</param>
     /// <param name="msDelay">The time the notification should be displayed for.</param>
-    public void AddNotification(
-        string content, string? title = null, NotificationType type = NotificationType.None, uint msDelay = 3000)
+    [Obsolete($"Use {nameof(INotificationManager)}.", false)]
+    [Api10ToDo(Api10ToDoAttribute.DeleteCompatBehavior)]
+    public async void AddNotification(
+        string content,
+        string? title = null,
+        NotificationType type = NotificationType.None,
+        uint msDelay = 3000)
     {
-        Service<NotificationManager>
-            .GetAsync()
-            .ContinueWith(task =>
+        var nm = await Service<NotificationManager>.GetAsync();
+        var an = nm.AddNotification(
+            new()
             {
-                if (task.IsCompletedSuccessfully)
-                    task.Result.AddNotification(content, title, type, msDelay);
-            });
+                Content = content,
+                Title = title,
+                Type = type,
+                Expiry = DateTime.Now + TimeSpan.FromMilliseconds(msDelay),
+            },
+            this.localPlugin);
+        _ = this.notifications.TryAdd(an, 0);
+        an.Dismiss += (a, unused) => this.notifications.TryRemove(an, out _);
     }
 
     /// <summary>
     /// Unregister the UiBuilder. Do not call this in plugin code.
     /// </summary>
-    void IDisposable.Dispose() => this.scopedFinalizer.Dispose();
+    void IDisposable.Dispose()
+    {
+        this.scopedFinalizer.Dispose();
+
+        // Taken from NotificationManagerPluginScoped.
+        // TODO: remove on API 10.
+        while (!this.notifications.IsEmpty)
+        {
+            foreach (var n in this.notifications.Keys)
+            {
+                this.notifications.TryRemove(n, out _);
+                ((ActiveNotification)n).RemoveNonDalamudInvocations();
+            }
+        }
+    }
 
     /// <summary>
     /// Open the registered configuration UI, if it exists.

Dalamud/Plugin/DalamudPluginInterface.cs

@@ -52,7 +52,7 @@ public sealed class DalamudPluginInterface : IDisposable
         var dataManager = Service<DataManager>.Get();
         var localization = Service<Localization>.Get();
 
-        this.UiBuilder = new UiBuilder(plugin.Name);
+        this.UiBuilder = new UiBuilder(plugin.Name, plugin);
 
         this.configs = Service<PluginManager>.Get().PluginConfigs;
         this.Reason = reason;

Dalamud/Plugin/Services/INotificationManager.cs

@@ -0,0 +1,16 @@
+using Dalamud.Interface.ImGuiNotification;
+
+namespace Dalamud.Plugin.Services;
+
+/// <summary>
+/// Manager for notifications provided by Dalamud using ImGui.
+/// </summary>
+public interface INotificationManager
+{
+    /// <summary>
+    /// Adds a notification.
+    /// </summary>
+    /// <param name="notification">The new notification.</param>
+    /// <returns>The added notification.</returns>
+    IActiveNotification AddNotification(Notification notification);
+}