[Webkit-unassigned] [Bug 177715] clipboardData.setData() fails on iOS with certain kind of selections.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177715

--- Comment #1 from Wenson Hsieh <wenson_hsieh at apple.com> ---
(In reply to Lucas Garron from comment #0)
> As documented in https://bugs.webkit.org/show_bug.cgi?id=156529 , Safari
> doesn't allow document.execCommand("copy") when there is no selection.
> It is possible work around this but by creating a temporary selection:
> https://bugs.webkit.org/show_bug.cgi?id=156529#c4
> 
> However, this workaround is broken on iOS. After the temporary selection is
> selected, document.queryCommandEnabled("copy") returns true and a function
> registered using document.addEventListener("copy", ...) fires. *However*,
> `event.clipboardData.setData()` has no effect.
> 
> Consider the following sample:
> 
>     <script>
>     document.addEventListener("copy", function(e) {
>       e.clipboardData.setData("text/plain", "This is plain text.");
>       console.log(e.clipboardData.getData("text/plain"));
>       e.preventDefault();
>     });
> 
>     function copy() {
>       var sel = document.getSelection();
>       var range = document.createRange();
>       range.selectNodeContents(document.body);
>       sel.removeAllRanges();
>       sel.addRange(range);
>       document.execCommand("copy");
>       window.getSelection().removeAllRanges();
>     }
>     </script>
>     <button onclick='copy()'>Copy text (plain)</button>
> 
> The `console.log(...)` line prints "This is plain text." on desktop Safari,
> but a blank string on iOS.
> Consequently, the clipboard is emptied (even if it contained something
> before).

This is working for me using ToT WebKit, on iOS 11.

I'm pretty sure Ryosuke and I fixed this with recent work around enhanced pasteboard/DataTransfer support in WebKit.

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