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57 lines
2.2 KiB
C#
57 lines
2.2 KiB
C#
using Microsoft.AspNetCore.Components;
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namespace AIStudio.Components;
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/// <summary>
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/// Marks an area whose drops end up at its default target when they hit no specific zone.
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/// </summary>
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/// <remarks>
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/// <para>
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/// This is how the habitual behaviour survives the move to hit testing: a file dropped anywhere in
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/// the chat, in an assistant, or in a dialog still arrives where it used to, while a file dropped
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/// on a specific zone now arrives exactly there. No code decides between the two -- the browser
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/// does, because the specific zone lies deeper in the DOM than the area around it, and the hit test
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/// resolves from the inside out.
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/// </para>
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/// <para>
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/// The component replaces an existing element rather than adding one: it takes the class and the
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/// style of the element it stands in for. Where the areas already had a wrapper, which is the case
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/// for every page and every assistant, nothing about the layout changes.
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/// </para>
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/// </remarks>
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public partial class DropZoneScope : ComponentBase
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{
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/// <summary>
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/// The content of the area.
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/// </summary>
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[Parameter]
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public RenderFragment? ChildContent { get; set; }
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/// <summary>
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/// The CSS classes of the element this scope renders.
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/// </summary>
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[Parameter]
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public string Class { get; set; } = string.Empty;
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/// <summary>
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/// The inline style of the element this scope renders.
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/// </summary>
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[Parameter]
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public string Style { get; set; } = string.Empty;
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/// <summary>
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/// The state to cascade, for hosts which want to be the default target of their own area.
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/// </summary>
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/// <remarks>
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/// A host cannot read what it cascades itself, so a page which is its own drop target has to own
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/// the state instead. The plugins page is such a case: it accepts an archive anywhere on it and
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/// has no inner zone to hand the role to. Everybody else leaves this alone and lets the scope
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/// keep its own state.
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/// </remarks>
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[Parameter]
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public DropZoneScopeState? State { get; set; }
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private readonly DropZoneScopeState ownState = new($"drop-zone-scope-{Guid.NewGuid():N}");
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private DropZoneScopeState EffectiveState => this.State ?? this.ownState;
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} |