Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: d9e56bdd5434d75f2c718a21e4046375da92894f
https://github.com/WebKit/WebKit/commit/d9e56bdd5434d75f2c718a21e4046375da92894f
Author: Zak Ridouh <[email protected]>
Date: 2026-09-28 (Mon, 28 Sep 2026)
Changed paths:
M Source/WebKit/UIProcess/WebPageProxy.cpp
M Tools/TestWebKitAPI/Tests/WebKit/WKWebView/SiteIsolation.mm
Log Message:
-----------
[Site Isolation] dataTransfer.types is empty during dragover in a cross-site
iframe
<https://bugs.webkit.org/show_bug.cgi?id=325351>
<rdar://problem/188452480>
Reviewed by Ryosuke Niwa.
Under Site Isolation, dragenter and dragover over a cross-site iframe are
forwarded to the iframe's process, but
only the main frame's process is granted access to the drag pasteboard's types.
The iframe sees an empty
dataTransfer.types, so drop zones that only accept drags containing "Files"
refuse the drop.
When performDragControllerAction forwards the drag to a frame, grant that
frame's process access to the pasteboard
types, as propagateDragAndDrop already does for the drop.
Test: Tools/TestWebKitAPI/Tests/WebKit/WKWebView/SiteIsolation.mm
* Source/WebKit/UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::performDragControllerAction):
* Tools/TestWebKitAPI/Tests/WebKit/WKWebView/SiteIsolation.mm:
(TestWebKitAPI::TEST(SiteIsolation,
DragOverDataTransferTypesInCrossOriginSubframe)):
Canonical link: https://commits.webkit.org/322074@main
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