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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Drawing;
using Windows.Win32.System.Variant;
using Windows.Win32.UI.Accessibility;
namespace System.Windows.Forms;
public partial class Form
{
/// <summary>
/// Form control accessible object with UI Automation provider functionality.
/// </summary>
internal class FormAccessibleObject : ControlAccessibleObject
{
internal FormAccessibleObject(Form owner) : base(owner)
{
}
public override Rectangle Bounds => this.IsOwnerHandleCreated(out Control? owner)
? owner.RectangleToScreen(owner.ClientRectangle)
: Rectangle.Empty;
internal override Rectangle BoundingRectangle
=> !this.IsOwnerHandleCreated(out Control? owner)
? Rectangle.Empty
: owner.Parent?.RectangleToScreen(owner.Bounds) ?? owner.Bounds;
internal override VARIANT GetPropertyValue(UIA_PROPERTY_ID propertyID) =>
propertyID switch
{
// Unlike other controls, here the default "ControlType" doesn't correspond the value from the mapping
// depending on the default Role.
// In other cases "ControlType" will reflect changes to Form.AccessibleRole (i.e. if it is set to a custom role).
UIA_PROPERTY_ID.UIA_ControlTypePropertyId when
Role == AccessibleRole.Client
=> (VARIANT)(int)UIA_CONTROLTYPE_ID.UIA_WindowControlTypeId,
UIA_PROPERTY_ID.UIA_IsDialogPropertyId => (VARIANT)(this.TryGetOwnerAs(out Form? owner) && owner.Modal),
_ => base.GetPropertyValue(propertyID)
};
internal override bool IsIAccessibleExSupported() => true;
public override AccessibleRole Role => this.GetOwnerAccessibleRole(AccessibleRole.Client);
}
}
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