LibWeb/HTML: Implement DataTransferItem.webkitGetAsEntry()

Author: https://github.com/jamierocks
Commit: 2e9aec984c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1172
Reviewed-by: https://github.com/trflynn89

Tests/LibWeb/Text/expected/HTML/data-transfer.txt

@@ -7,3 +7,4 @@ stringItemAsString: data=well hello friends
 fileItem: kind=file, type=text/plain
 length=2, types=custom-type,Files
 fileItemAsFile: name=file.txt, type=text/plain
+fileItemAsEntry: name=file.txt, file=true, directory=false

Tests/LibWeb/Text/input/HTML/data-transfer.html

@@ -40,6 +40,9 @@
         let fileItemAsFile = fileItem.getAsFile();
         println(`fileItemAsFile: name=${fileItemAsFile.name}, type=${fileItemAsFile.type}`);
 
+        let fileItemAsEntry = fileItem.webkitGetAsEntry();
+        println(`fileItemAsEntry: name=${fileItemAsEntry.name}, file=${fileItemAsEntry.isFile}, directory=${fileItemAsEntry.isDirectory}`);
+
         if (dataTransferItemList[1] !== fileItem) {
             println("FAILED");
         }

Userland/Libraries/LibWeb/HTML/DataTransferItem.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -148,4 +149,26 @@ JS::GCPtr<FileAPI::File> DataTransferItem::get_as_file() const
     return MUST(FileAPI::File::create(realm, { JS::make_handle(blob) }, file_name, move(options)));
 }
 
+// https://wicg.github.io/entries-api/#dom-datatransferitem-webkitgetasentry
+JS::GCPtr<EntriesAPI::FileSystemEntry> DataTransferItem::webkit_get_as_entry() const
+{
+    auto& realm = this->realm();
+
+    // 1. Let store be this's DataTransfer object’s drag data store.
+
+    // 2. If store’s drag data store mode is not read/write mode or read-only mode, return null and abort these steps
+    if (mode() != DragDataStore::Mode::ReadWrite && mode() != DragDataStore::Mode::ReadOnly)
+        return nullptr;
+
+    // 3. Let item be the item in store’s drag data store item list that this represents.
+    auto const& item = m_data_transfer->drag_data(*m_item_index);
+
+    // 4. If item’s kind is not File, then return null and abort these steps.
+    if (item.kind != DragDataStoreItem::Kind::File)
+        return nullptr;
+
+    // 5. Return a new FileSystemEntry object representing the entry.
+    return EntriesAPI::FileSystemEntry::create(realm, EntriesAPI::EntryType::File, item.file_name);
+}
+
 }

Userland/Libraries/LibWeb/HTML/DataTransferItem.h

@@ -9,6 +9,7 @@
 #include <AK/Optional.h>
 #include <LibJS/Forward.h>
 #include <LibWeb/Bindings/PlatformObject.h>
+#include <LibWeb/EntriesAPI/FileSystemEntry.h>
 #include <LibWeb/HTML/DragDataStore.h>
 
 namespace Web::HTML {
@@ -28,6 +29,8 @@ public:
     void get_as_string(JS::GCPtr<WebIDL::CallbackType>) const;
     JS::GCPtr<FileAPI::File> get_as_file() const;
 
+    JS::GCPtr<EntriesAPI::FileSystemEntry> webkit_get_as_entry() const;
+
 private:
     DataTransferItem(JS::Realm&, JS::NonnullGCPtr<DataTransfer>, size_t item_index);
 

Userland/Libraries/LibWeb/HTML/DataTransferItem.idl

@@ -1,3 +1,4 @@
+#import <EntriesAPI/FileSystemEntry.idl>
 #import <FileAPI/File.idl>
 
 callback FunctionStringCallback = undefined (DOMString data);
@@ -9,4 +10,7 @@ interface DataTransferItem {
     readonly attribute DOMString type;
     undefined getAsString(FunctionStringCallback? _callback);
     File? getAsFile();
+
+    // https://wicg.github.io/entries-api/#dom-datatransferitem-webkitgetasentry
+    FileSystemEntry? webkitGetAsEntry();
 };