MindWorkAI/AI-Studio
1
0 Fork 0
mirror of https://github.com/MindWorkAI/AI-Studio.git synced 2026-10-17 22:57:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

Deliver each drop to the zone under the cursor

Browse Source
This commit is contained in:
Thorsten Sommer committed 2026-09-10 11:32:08 +02:00
1 parent d741a6e06d
commit 14066a93fb
40 files changed
+446 -394
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

app/MindWork AI Studio/Components/PathDropZone.razor.cs
+69 -89
View File
@@ -1,5 +1,3 @@
using AIStudio.Tools.Rust;
using Microsoft.AspNetCore.Components;
namespace AIStudio.Components;
@@ -28,22 +26,13 @@ public partial class PathDropZone : MSGComponentBase
public EventCallback<List<string>> OnPathsDropped { get; set; }
/// <summary>
/// On which layer to register the drop area. Higher layers have priority over lower layers.
/// </summary>
[Parameter]
public int Layer { get; set; } = DropLayers.ROOT;
/// <summary>
/// Catch all documents that are hovered over the AI Studio window and not only over the drop zone.
/// Makes this zone the default target of its area, meaning of its page, assistant, or dialog.
/// </summary>
/// <remarks>
/// Practically every zone needs this today. Hovering is detected through mouse events, and no
/// webview delivers those while a native drag is in progress, so a zone without this flag
/// hardly ever catches anything. The consequence is that two zones of the same layer cannot be
/// told apart: the one carrying this flag takes every drop, including the ones meant for the
/// other. A page may therefore hold only one zone per layer. Lifting that limit needs the
/// cursor position, which the runtime receives from Tauri and currently discards in
/// app_window.rs.
/// A drop aimed at this zone arrives here in any case. What this flag decides is the fate of the
/// drops aimed anywhere else in the surrounding area which hit no zone of their own: with the
/// flag, they arrive here as well. Only one zone per area can hold that role, and if several ask
/// for it, the first one in the markup gets it.
/// </remarks>
[Parameter]
public bool CatchAllDocuments { get; set; }
@@ -52,127 +41,118 @@ public partial class PathDropZone : MSGComponentBase
/// When true, the zone ignores drops and is not highlighted.
/// </summary>
/// <remarks>
/// The drop area stays registered nevertheless. Releasing it during the lifetime of the
/// component would lower the count of every zone below this one, and those zones would then
/// catch files while this one is still on screen.
/// It keeps its ID in the DOM nevertheless and therefore swallows the drops aimed at it. That is
/// what the pointer says: it rests on a switched-off field, so nothing happens. Letting the drop
/// fall through to the area behind it would deliver the files somewhere else entirely.
/// </remarks>
[Parameter]
public bool Disabled { get; set; }
/// <summary>
/// The area this zone lives in, if it lives in one at all.
/// </summary>
[CascadingParameter]
private DropZoneScopeState? Scope { get; set; }
[Inject]
private ILogger<PathDropZone> Logger { get; init; } = null!;
private const string DEFAULT_DRAG_CLASS = "relative rounded-lg border-2 border-dashed pa-3 mb-3 mud-width-full";
private readonly string dropZoneId = $"path-drop-zone-{Guid.NewGuid():N}";
private string dragClass = DEFAULT_DRAG_CLASS;
private uint numDropAreasAboveThis;
private bool isComponentHovered;
private bool isDefaultZone;
private bool isHighlighted;
#region Overrides of MSGComponentBase
protected override async Task OnInitializedAsync()
{
this.ApplyFilters([], [ Event.TAURI_EVENT_RECEIVED, Event.REGISTER_FILE_DROP_AREA, Event.UNREGISTER_FILE_DROP_AREA ]);
await this.MessageBus.SendMessage(this, Event.REGISTER_FILE_DROP_AREA, this.Layer);
this.ApplyFilters([], [ Event.HIGHLIGHT_DROP_ZONE, Event.PATHS_DROPPED ]);
this.ClaimDefaultZoneRole();
await base.OnInitializedAsync();
}
/// <summary>
/// Releases the drop area.
/// Hands the role of the default target back to the area.
/// </summary>
protected override void DisposeResources()
{
// Without this, drop areas below this one would count this component forever and would
// stop catching dropped files:
this.MessageBus.SendMessage(this, Event.UNREGISTER_FILE_DROP_AREA, this.Layer).Observe($"{nameof(PathDropZone)}: releasing the drop area");
if (this.isDefaultZone)
this.Scope?.ReleaseDefaultZone(this);
base.DisposeResources();
}
protected override async Task ProcessIncomingMessage<T>(ComponentBase? sendingComponent, Event triggeredEvent, T? data) where T : default
{
// A disabled zone takes no files. It keeps track of the zones above it, though, because
// those come and go while this one is disabled:
if (this.Disabled && triggeredEvent == Event.TAURI_EVENT_RECEIVED)
return;
switch (triggeredEvent)
{
case Event.REGISTER_FILE_DROP_AREA when sendingComponent != this:
{
if(data is int layer && layer > this.Layer)
case Event.HIGHLIGHT_DROP_ZONE when data is DropZoneHighlight highlight:
this.ApplyHighlight(this.IsThisZone(highlight.ZoneId));
break;
case Event.PATHS_DROPPED when data is DroppedPaths dropped:
// Whoever the drop was meant for, the drag is over and no zone stays highlighted:
this.ApplyHighlight(false);
if (!this.IsThisZone(dropped.ZoneId))
return;
if (this.Disabled)
{
this.numDropAreasAboveThis++;
this.ClearDragClass();
this.Logger.LogDebug("The path drop zone '{ZoneId}' is disabled and swallowed {Count} dropped path(s).", this.dropZoneId, dropped.Paths.Count);
return;
}
break;
}
case Event.UNREGISTER_FILE_DROP_AREA when sendingComponent != this:
{
if(data is int layer && layer > this.Layer && this.numDropAreasAboveThis > 0)
this.numDropAreasAboveThis--;
break;
}
case Event.TAURI_EVENT_RECEIVED when data is TauriEvent { EventType: TauriEventType.FILE_DROP_HOVERED }:
if(!this.CanCatchDroppedPath())
return;
this.SetDragClass();
this.StateHasChanged();
break;
case Event.TAURI_EVENT_RECEIVED when data is TauriEvent { EventType: TauriEventType.FILE_DROP_CANCELED }:
case Event.TAURI_EVENT_RECEIVED when data is TauriEvent { EventType: TauriEventType.WINDOW_NOT_FOCUSED }:
this.isComponentHovered = false;
this.ClearDragClass();
this.StateHasChanged();
break;
case Event.TAURI_EVENT_RECEIVED when data is TauriEvent { EventType: TauriEventType.FILE_DROP_DROPPED, Payload: var paths }:
if(!this.CanCatchDroppedPath())
return;
this.Logger.LogDebug("The path drop zone on layer {Layer} caught {Count} path(s).", this.Layer, paths.Count);
await this.OnPathsDropped.InvokeAsync(paths);
this.ClearDragClass();
this.StateHasChanged();
this.Logger.LogDebug("The path drop zone '{ZoneId}' caught {Count} path(s).", this.dropZoneId, dropped.Paths.Count);
await this.OnPathsDropped.InvokeAsync(dropped.Paths);
break;
}
}
#endregion
private bool CanCatchDroppedPath() => this.numDropAreasAboveThis is 0 && (this.isComponentHovered || this.CatchAllDocuments);
private void SetDragClass() => this.dragClass = $"{DEFAULT_DRAG_CLASS} mud-border-primary border-2";
private void ClearDragClass() => this.dragClass = DEFAULT_DRAG_CLASS;
private void OnMouseEnter(EventArgs _)
/// <summary>
/// Asks the area for the role of its default target, if this zone wants it.
/// </summary>
private void ClaimDefaultZoneRole()
{
if(this.Disabled || this.numDropAreasAboveThis > 0)
if (!this.CatchAllDocuments || this.Scope is null)
return;
// A native drag delivers no DOM events at all, mouse events included. This fires before a
// drag begins, while the pointer still moves freely, which makes it a hint about where the
// user is aiming rather than a reliable signal. See the remarks on CatchAllDocuments:
this.isComponentHovered = true;
this.SetDragClass();
this.StateHasChanged();
this.isDefaultZone = this.Scope.TryBecomeDefaultZone(this);
if (!this.isDefaultZone)
this.Logger.LogDebug("The path drop zone '{ZoneId}' asked to be the default target of its area, which another zone already is. It now takes only the drops aimed at itself.", this.dropZoneId);
}
private void OnMouseLeave(EventArgs _)
/// <summary>
/// Decides whether the named zone is this one.
/// </summary>
/// <remarks>
/// The area counts as this zone as long as this zone is its default target. That is the whole
/// mechanism behind dropping anywhere in a page and still landing here.
/// </remarks>
/// <param name="zoneId">The ID the hit test reported, or null when it hit nothing.</param>
private bool IsThisZone(string? zoneId) => zoneId is not null && (zoneId == this.dropZoneId || (this.isDefaultZone && zoneId == this.Scope?.ScopeId));
/// <summary>
/// Highlights the zone, or takes the highlight away.
/// </summary>
/// <remarks>
/// The comparison is not for tidiness: a throttled drag-over event arrives about ten times per
/// second, and without it every one of them would render every zone on the page anew.
/// </remarks>
private void ApplyHighlight(bool shouldBeHighlighted)
{
if(this.Disabled)
var highlighted = shouldBeHighlighted && !this.Disabled;
if (highlighted == this.isHighlighted)
return;
this.isComponentHovered = false;
this.ClearDragClass();
this.isHighlighted = highlighted;
this.dragClass = highlighted ? $"{DEFAULT_DRAG_CLASS} mud-border-primary border-2" : DEFAULT_DRAG_CLASS;
this.StateHasChanged();
}
}