[Webkit-unassigned] [Bug 218519] Can't paste image data (like image/png) from the clipboard in WebKit browsers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218519

--- Comment #23 from 荒野無燈 <ttys3.rust at gmail.com> ---
(In reply to Miikka from comment #22)
> (In reply to 荒野無燈 from comment #18)
> > Created attachment 433288 [details]
> > fix: fallback to readBufferFromClipboard if readFilePathsFromClipboard get
> > no files, this fix makes ctrl + v paste image under GTK  works
> > 
> > in Source/WebCore/dom/DataTransfer.cpp 
> > DataTransfer::filesFromPasteboardAndItemList
> > 
> > ```cpp
> >  WebCorePasteboardFileReader reader(context);
> >  m_pasteboard->read(reader);
> >  files = WTFMove(reader.files);
> > ```
> > 
> > it only calls `void Pasteboard::read(PasteboardFileReader& reader,
> > std::optional<size_t>)`, 
> > 
> > and `Pasteboard::read(PasteboardWebContentReader& reader,
> > WebContentReadingPolicy policy, std::optional<size_t>)` got no chances, so
> > the image data dit not got read.
> > 
> > this patch is a workaround to fixup the problem (tested under webkitgtk
> > 2.32.0 and 2.32.1).
> > 
> > by patching `void Pasteboard::read(PasteboardFileReader& reader,
> > std::optional<size_t>)`,  and call
> > `WebCorePasteboardFileReader::readBuffer`, we can make
> > `DataTransferItem::getAsFile()` get the image file data.
> 
> Thanks. I applied the patch you linked
> (https://bugs.webkit.org/attachment.cgi?id=433288&action=diff) against
> webkitgtk 2.32.2 and the compiled it and then compiled Epiphany 40.2 against
> that webkitgtk build but pasting image data from the clipboard still does
> not work for me.
> 
> Is this https://bugs.webkit.org/attachment.cgi?id=433288&action=diff enough
> or should I apply something else too? Waht do you mean with this: "by
> patching `void Pasteboard::read(PasteboardFileReader& reader,
> std::optional<size_t>)`,  and call
> `WebCorePasteboardFileReader::readBuffer`, we can make
> `DataTransferItem::getAsFile()` get the image file data."?

just use this patch will works fine.

please note that this patch does not related to GNOME Web browser Epiphany.

I compared from webkitgtk-2.32.0 to webkitgtk-2.32.2, the `Source/WebCore/platform/gtk/PasteboardGtk.cpp` file are all the same, 
I tested the patch under webkitgtk 2.32.0 and 2.32.1, so I do think it should works for 2.32.2

by the way, I use this page (thanks Sonny Piers) to test: https://codepen.io/tmrDevelops/pen/YxGQaW

and I also tested it under Epiphany 40.1 on Ubuntu 21.04 (https://i.ibb.co/FXhhSYZ/Epiphany-40-1-on-Ubuntu-21-042021-07-12-21-07.png), and Epiphany Technology Preview 41.alpha-4-g70730e4dd+ does not work. but I recommend you not to verify the patch via Epiphany browser, this will introduce more variable.

Using a simple code (in your favorite lang) to create a webview, then loading the page: https://codepen.io/tmrDevelops/pen/YxGQaW and then see if it works.

In my situation, I use the WebKitGtk lib via https://github.com/gtk-rs/webkit2gtk-rs

hope this will help you.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20210712/dedf8e30/attachment.htm>