Thanks Alex!

It looks like 
crbug.com/1263817<https://bugs.chromium.org/p/chromium/issues/detail?id=1263817>
 is a good tracking bug for https://github.com/w3c/uievents/issues/202 (which 
is already linked from there). Since EditContext differs in how these events 
will fire I think this issue can be resolved separately, but I’ve tagged some 
folks in on that issue to try to drive some progress.

I’ll investigate what can be done to get the tests moved to WPT.

From: Alex Russell <[email protected]>
Sent: Wednesday, June 14, 2023 8:32 AM
To: blink-dev <[email protected]>
Cc: Yoav Weiss <[email protected]>; Mike Taylor <[email protected]>; 
[email protected] <[email protected]>; Joshua Bell 
<[email protected]>; [email protected] <[email protected]>; Anupam Snigdha 
<[email protected]>; Alex Keng <[email protected]>; Daniel Clark 
<[email protected]>; [email protected] <[email protected]>
Subject: Re: [blink-dev] Intent to Experiment: EditContext API

LGTM to experiment assuming WPT caveats are addressed.

On editing event order, perhaps we can track this separately. Is there a crbug 
for it?
On Tuesday, June 13, 2023 at 9:02:34 PM UTC-7 Yoav Weiss wrote:
On Wed, Jun 14, 2023 at 12:03 AM 'Daniel Clark' via blink-dev 
<[email protected]<mailto:[email protected]>> wrote:
> Although in the template this is phrased as a yes/no question, can you say 
> more about the WPT coverage and limitations?

We currently do not have tests in web-platform-tests.
There are tests outside the external/wpt folder:
third_party/blink/web_tests/editing/input/edit-context.html<https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/editing/input/edit-context.html>
third_party/blink/web_tests/editing/input/edit-context-dom-mutation.html<https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/editing/input/edit-context-dom-mutation.html>

I’m going to migrate as much of the contents of these as I can to WPT. This 
won’t be possible for a lot of the subtests since they rely on primitives like 
eventSender and textInputController, which aren’t available in WPT.
There is also test coverage that still needs to be written for scenarios 
involving nested editable elements, and I plan to add these as WPTs.

Would it be possible to add WebDriver extensions to enable these tests to move 
over to WPT?

+Mathias Bynens<mailto:[email protected]> - FYI


There’s been some work 
done<https://chromium-review.googlesource.com/c/chromium/src/+/3009937> around 
adding support for IME testing but my understanding is that more work is needed 
in order to use this in WPTs.

From: Daniel Clark
Sent: Tuesday, June 13, 2023 10:42 AM
To: Mike Taylor <[email protected]<mailto:[email protected]>>; 
[email protected]<mailto:[email protected]>
Cc: Chris Harrelson <[email protected]<mailto:[email protected]>>; Anupam 
Snigdha <[email protected]<mailto:[email protected]>>; Alex Keng 
<[email protected]<mailto:[email protected]>>
Subject: RE: [blink-dev] Intent to Experiment: EditContext API

Tentatively M116 - M120 for the trial.

From: Mike Taylor <[email protected]<mailto:[email protected]>>
Sent: Tuesday, June 13, 2023 9:24 AM
To: Daniel Clark <[email protected]<mailto:[email protected]>>; 
[email protected]<mailto:[email protected]>
Cc: Chris Harrelson <[email protected]<mailto:[email protected]>>; Anupam 
Snigdha <[email protected]<mailto:[email protected]>>; Alex Keng 
<[email protected]<mailto:[email protected]>>
Subject: Re: [blink-dev] Intent to Experiment: EditContext API


Do you all have a timeline in mind for experimentation?
On 6/12/23 7:00 PM, 'Daniel Clark' via blink-dev wrote:
Contact emails
[email protected]<mailto:[email protected]>, 
[email protected]<mailto:[email protected]>, 
[email protected]<mailto:[email protected]>, 
[email protected]<mailto:[email protected]>

Explainer
https://github.com/w3c/edit-context/blob/gh-pages/explainer.md

Specification
https://w3c.github.io/edit-context

Design docs

https://github.com/w3c/edit-context/blob/gh-pages/dev-design.md

Summary

The EditContext API simplifies the process of integrating a web app with 
advanced text input methods such as VK shape-writing, Handwriting panels, 
speech recognition, IME Compositions etc., improves accessibility and 
performance, and unlocks new capabilities for web-based editors.


Blink component
Blink>Editing<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EEditing>

Search tags
editing<https://chromestatus.com/features#tags:editing>, 
contenteditable<https://chromestatus.com/features#tags:contenteditable>, 
input<https://chromestatus.com/features#tags:input>, 
rawinput<https://chromestatus.com/features#tags:rawinput>, 
ime<https://chromestatus.com/features#tags:ime>

TAG review
https://github.com/w3ctag/design-reviews/issues/416

TAG review status
Pending

Risks


Interoperability and Compatibility

There are no known interop or compat risks.


Gecko: No signal

WebKit: No signal
It'd be good to file for positions (even if that doesn't block an OT)


Web developers: Strongly positive Positive feedback from Word online, Adobe and 
Figma, Google Docs

Other signals:

Activation

Developers interested in this feature will typically have their own polyfill 
for text input using hidden textarea or contenteditable elements. Feature 
detecting and using new API to avoid side effects of previous approaches is 
intended to be easily adoptable.

Do we plan for each property that adopts this to write their own polyfill? Or 
to split their code paths for supporting and non supporting browsers?


WebView application risks

None

Goals for experimentation
We are looking for feedback on the developer ergonomics of using the API and 
for confirmation that it meets the needs of production web apps for various 
input modes. This is a complex API, and different developers are expected to 
use it in different ways. For example, some partners plan to construct the view 
of their editable region in the subtree of the EditContext-associated element, 
while other partners plan to keep the EditContext-associated element off-screen 
while using the EditContext APIs to set the bounds of the editable region.

We want to ensure that our design enables all these scenarios and is robust 
given the wide field of IMEs utilized by different users, which may have subtly 
different behaviors and event timings.

Ongoing technical constraints

None


Debuggability
Existing DevTools functionality should suffice to debug EditContext.
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
Chrome OS, Android, and Android WebView)?
Yes

Is this feature fully tested by 
web-platform-tests<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
No

Flag name
--enable-blink-features=EditContext

Requires code in //chrome?
False

Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=999184

Estimated milestones

No milestones specified


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5041440373604352

Links to previous Intent discussions
I2I: 
https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/OHqvPx9mFww/m/1za_qdEHDwAJ
This intent message was generated by Chrome Platform 
Status<https://chromestatus.com/>.

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