[Webkit-unassigned] [Bug 178058] dataTransfer.effectAllowed returns "all" when it's set to "copy" or "move" during dragstart

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178058

Devon Govett <govett at adobe.com> changed:

           What    |Removed                     |Added
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                 CC|                            |govett at adobe.com

--- Comment #4 from Devon Govett <govett at adobe.com> ---
This is still a problem. The behavior is slightly different on macOS and iOS:

* On macOS, effectAllowed is always "copyMove" in the dragover event regardless of what was set during dragstart, unless a modifier key is set, in which case it is filtered to either copy or move. This also means that dropEffect can never be set to "link", and holding the Control key results in effectAllowed being set to "none" rather than "link".

  For drags initiated outside the browser, e.g. in Finder, effectAllowed is always "all" rather than "copyMove", and "link" operations work as expected.

* On iOS, effectAllowed is always "all". Modifier keys have no effect.

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