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Store web_sys::File inside of DroppedFile (#8354)

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* Closes #4654
* Related #4667
* [x] I have followed the instructions in the PR template

This PR avoids materializing the contents of a file that was dragged
into an egui application on the web. It does so by storing the
`web_sys::File` handle directly on WASM.

This breaks the existing API of `DroppedFile` on the web, because there
is no way to retrieve the bytes synchronously form a `DroppedFile`
anymore, forcing handling call sites to become asynchronous.

The native API remains the same.

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
This commit is contained in:
Jochen Görtler
2026-08-03 17:07:37 +02:00
committed by GitHub
parent 2e7a92bc37
commit 49d4befe6b
13 changed files with 197 additions and 120 deletions
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crates/eframe/Cargo.toml
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@@ -209,7 +209,6 @@ image = { workspace = true, features = ["png"] } # For copying images
js-sys.workspace = true
percent-encoding.workspace = true
wasm-bindgen.workspace = true
wasm-bindgen-futures.workspace = true
web-sys = { workspace = true, features = [
"AddEventListenerOptions",
"BinaryType",