[FileInput] Fix uploading the same file twice by drag&drop

examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml

@@ -6337,6 +6337,11 @@
             Gets or sets a value indicating whether the element is checked.
             </summary>
         </member>
+        <member name="P:Microsoft.FluentUI.AspNetCore.Components.FluentMenuItem.KeepOpen">
+            <summary>
+            Gets or sets a value indicates whether the FluentMenu should remain open after an action.
+            </summary>
+        </member>
         <member name="P:Microsoft.FluentUI.AspNetCore.Components.FluentMenuItem.ChildContent">
             <summary>
             Gets or sets the content to be rendered inside the component.

examples/Demo/Shared/Pages/InputFile/Examples/InputFileDefault.razor

@@ -6,7 +6,7 @@
                  Accept="image/*"
                  @bind-ProgressPercent="@ProgressPercent"
                  OnCompleted="@OnCompletedAsync"
-                 Style="height: 300px; border: 1px dashed var(--accent-fill-rest);">
+                 Style="height: 300px;">
     <ChildContent>
         <label for="my-file-uploader">
             <FluentIcon Value="@(new @Icons.Regular.Size24.ArrowUpload())" />

src/Core/Components/InputFile/FluentInputFile.razor

@@ -2,19 +2,12 @@
 @using Microsoft.AspNetCore.Components.Forms
 @inherits FluentComponentBase
 
-<div class="@ClassValue"
+<div class="@ClassValue" 
      style="@StyleValue"
-     drop-files="@DropOver"
      disabled="@Disabled"
-     @ondragenter="@(e => DropOver = true)"
-     @ondragenter:stopPropagation
-     @ondragover="@(e => DropOver = true)"
-     @ondragover:stopPropagation
-     @ondragleave="@(e => DropOver = false)"
-     @ondragleave:stopPropagation
-     @ondragend="@(e => DropOver = false)">
+     @ref="@_containerElement">
 
-    <div class="inputfile-content" style="z-index: @(DropOver ? null : 999)">
+    <div class="inputfile-content">
 
         @ChildContent
 
@@ -31,8 +24,9 @@
         </div>
     </div>
 
-    <div style="grid-column: 1; grid-row: 1; @(DropOver ? $"z-index: {ZIndex.InputFileDropZone}" : null)">
+    <div style="grid-column: 1; grid-row: 1; ">
         <InputFile OnChange="OnUploadFilesHandlerAsync"
+                   @ref="@_inputFile"
                    id="@Id"
                    multiple=@Multiple
                    accept="@Accept"

src/Core/Components/InputFile/FluentInputFile.razor.cs

@@ -7,8 +7,12 @@
 namespace Microsoft.FluentUI.AspNetCore.Components;
 
 /// <summary />
-public partial class FluentInputFile : FluentComponentBase
+public partial class FluentInputFile : FluentComponentBase, IAsyncDisposable
 {
+    private ElementReference? _containerElement;
+    private InputFile? _inputFile;
+    private IJSObjectReference? _containerInstance;
+
     public static string ResourceLoadingBefore = "Loading...";
     public static string ResourceLoadingCompleted = "Completed";
     public static string ResourceLoadingCanceled = "Canceled";
@@ -193,11 +197,16 @@ public async Task ShowFilesDialogAsync()
     /// <summary />
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
-        if (firstRender && !string.IsNullOrEmpty(AnchorId))
+        if (firstRender)
         {
             Module ??= await JSRuntime.InvokeAsync<IJSObjectReference>("import", JAVASCRIPT_FILE.FormatCollocatedUrl(LibraryConfiguration));
 
-            await Module.InvokeVoidAsync("attachClickHandler", AnchorId, Id);
+            if (!string.IsNullOrEmpty(AnchorId))
+            {
+                await Module.InvokeVoidAsync("attachClickHandler", AnchorId, Id);
+            }
+
+            _containerInstance = await Module.InvokeAsync<IJSObjectReference>("initializeFileDropZone", _containerElement, _inputFile!.Element);
         }
     }
 
@@ -209,8 +218,6 @@ protected async Task OnUploadFilesHandlerAsync(InputFileChangeEventArgs e)
             throw new ApplicationException($"The maximum number of files accepted is {MaximumFileCount}, but {e.FileCount} were supplied.");
         }
 
-        DropOver = false;
-
         // Use the native Blazor event
         if (OnInputFileChange.HasDelegate)
         {
@@ -405,4 +412,19 @@ private async Task UpdateProgressAsync(int percent, string title)
             ProgressTitle = title;
         }
     }
+
+    // Unregister the drop zone events
+    public async ValueTask DisposeAsync()
+    {
+        if (_containerInstance != null)
+        {
+            await _containerInstance.InvokeVoidAsync("dispose");
+            await _containerInstance.DisposeAsync();
+        }
+
+        if (Module != null)
+        {
+            await Module.DisposeAsync();
+        }
+    }
 }

src/Core/Components/InputFile/FluentInputFile.razor.css

@@ -2,11 +2,13 @@
     display: grid;
     grid-gap: 10px;
     background-color: var(--neutral-fill-hover);
+    border: 1px dashed var(--accent-fill-rest);
 }
 
     .fluent-inputfile-container[drop-files] {
-        border: 2px dashed var(--accent-foreground-focus);
+        border: 1px solid var(--accent-fill-rest);
     }
+
     .fluent-inputfile-container .inputfile-content {
         grid-column: 1;
         grid-row: 1;

src/Core/Components/InputFile/FluentInputFile.razor.js

@@ -1,4 +1,4 @@
-export function raiseFluentInputFile(fileInputId) {
+export function raiseFluentInputFile(fileInputId) {
     var item = document.getElementById(fileInputId);
     if (!!item) {
         item.click();
@@ -21,3 +21,51 @@ export function previewImage(inputElem, index, imgElem) {
     imgElem.src = url;
     imgElem.alt = inputElem.files[index].name;
 }
+
+export function initializeFileDropZone(containerElement, inputFile) {
+    function onDragHover(e) {
+        e.preventDefault();
+        containerElement.setAttribute("drop-files", "true");
+    }
+
+    function onDragLeave(e) {
+        e.preventDefault();
+        containerElement.removeAttribute("drop-files");
+    }
+
+    // Handle the paste and drop events
+    function onDrop(e) {
+        e.preventDefault();
+        containerElement.removeAttribute("drop-files");
+
+        // Set the files property of the input element and raise the change event
+        inputFile.files = e.dataTransfer.files;
+        const event = new Event('change', { bubbles: true });
+        inputFile.dispatchEvent(event);
+    }
+
+    function onPaste(e) {
+        // Set the files property of the input element and raise the change event
+        inputFile.files = e.clipboardData.files;
+        const event = new Event('change', { bubbles: true });
+        inputFile.dispatchEvent(event);
+    }
+
+    // Register all events
+    containerElement.addEventListener("dragenter", onDragHover);
+    containerElement.addEventListener("dragover", onDragHover);
+    containerElement.addEventListener("dragleave", onDragLeave);
+    containerElement.addEventListener("drop", onDrop);
+    containerElement.addEventListener('paste', onPaste);
+
+    // The returned object allows to unregister the events when the Blazor component is destroyed
+    return {
+        dispose: () => {
+            containerElement.removeEventListener('dragenter', onDragHover);
+            containerElement.removeEventListener('dragover', onDragHover);
+            containerElement.removeEventListener('dragleave', onDragLeave);
+            containerElement.removeEventListener("drop", onDrop);
+            containerElement.removeEventListener('paste', onPaste);
+        }
+    }
+}

tests/Core/InputFile/FluentInputFileTests.FluentInputFile_Default.verified.razor.html

@@ -1,6 +1,6 @@
 
 <div class="fluent-inputfile-container" blazor:ondragenter="1" blazor:ondragenter:stoppropagation="" blazor:ondragover="2" blazor:ondragover:stoppropagation="" blazor:ondragleave="3" blazor:ondragleave:stoppropagation="" blazor:ondragend="4" b-72uj7bp8pi="">
-  <div class="inputfile-content" style="z-index: 999" b-72uj7bp8pi="">
+  <div class="inputfile-content" b-72uj7bp8pi="">
     Sample description
     <div class="inputfile-progress" style="visibility: hidden;" b-72uj7bp8pi="">
       <fluent-progress min="0" max="100" value="0" blazor:elementreference="xxx"></fluent-progress>

tests/Core/InputFile/FluentInputFileTests.FluentInputFile_Disabled.verified.razor.html

@@ -1,6 +1,6 @@
 
 <div class="fluent-inputfile-container" disabled="" blazor:ondragenter="1" blazor:ondragenter:stoppropagation="" blazor:ondragover="2" blazor:ondragover:stoppropagation="" blazor:ondragleave="3" blazor:ondragleave:stoppropagation="" blazor:ondragend="4" b-72uj7bp8pi="">
-    <div class="inputfile-content" style="z-index: 999" b-72uj7bp8pi="">
+    <div class="inputfile-content" b-72uj7bp8pi="">
         Sample description
         <div class="inputfile-progress" style="visibility: hidden;" b-72uj7bp8pi="">
             <fluent-progress min="0" max="100" value="0" blazor:elementreference="xxx"></fluent-progress>

tests/Core/InputFile/FluentInputFileTests.FluentInputFile_ProgressTemplate.verified.razor.html

@@ -1,9 +1,9 @@
 
 <div class="fluent-inputfile-container" blazor:ondragenter="1" blazor:ondragenter:stoppropagation="" blazor:ondragover="2" blazor:ondragover:stoppropagation="" blazor:ondragleave="3" blazor:ondragleave:stoppropagation="" blazor:ondragend="4" b-72uj7bp8pi="">
-  <div class="inputfile-content" style="z-index: 999" b-72uj7bp8pi="">Sample description
+  <div class="inputfile-content" b-72uj7bp8pi="">Sample description
     <div class="inputfile-progress" style="" b-72uj7bp8pi="">ProgressFileDetails { Index = 0, Name = , Percentage = 0 }</div>
   </div>
   <div style="grid-column: 1; grid-row: 1; " b-72uj7bp8pi="">
     <input id="xxx" accept="" type="file" blazor:elementreference="xxx">
   </div>
-</div>
+</div>

tests/Core/InputFile/FluentInputFileTests.FluentInputFile_UploadCompleted.verified.razor.html

@@ -1,11 +1,11 @@
 
 <div class="fluent-inputfile-container" blazor:ondragenter="1" blazor:ondragenter:stoppropagation="" blazor:ondragover="2" blazor:ondragover:stoppropagation="" blazor:ondragleave="3" blazor:ondragleave:stoppropagation="" blazor:ondragend="4" b-72uj7bp8pi="">
-  <div class="inputfile-content" style="z-index: 999" b-72uj7bp8pi="">Sample description
+  <div class="inputfile-content" b-72uj7bp8pi="">Sample description
     <div class="inputfile-progress" style="visibility: visible;" b-72uj7bp8pi="">
       <fluent-progress min="0" max="100" value="100" blazor:elementreference=""></fluent-progress>
       <br b-72uj7bp8pi="">Completed</div>
   </div>
   <div style="grid-column: 1; grid-row: 1; " b-72uj7bp8pi="">
     <input id="xxx" multiple="" accept="image/*" type="file" blazor:elementreference="">
   </div>
-</div>
+</div>

tests/Core/InputFile/FluentInputFileTests.razor

@@ -4,6 +4,7 @@
 {
     public FluentInputFileTests()
     {
+        JSInterop.Mode = JSRuntimeMode.Loose;
         Services.AddSingleton(LibraryConfiguration.ForUnitTests);
     }