Change the type of click, auxclick, and contextmenu to PointerEvent #317
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what's the status of this? just waiting for a review, or any more things happening upstream/in UIEvents? |
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The ui events part landed. The html spec part is sent. But Domenic suggested to wait until Chrome at least enables this and makes sure there is no regression. If so we will land the one in html spec. We can do either. Either merge now and if it turns out to cause some unrecoverable regressions then revert it. Or just wait until Chrome ships and confirms there is no bad regressions and then merge. I'll leave it up to you. |
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Just getting this ready but waiting for any tests/regression checks before merging. |
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@NavidZ Is this now enabled by default in Chrome? |
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Looking at the code it seems it is still under experimental flag. @mustaqahmed @liviutinta were running some experiments to make sure it is backward compatible and it doesn't cause any issues. I haven't heard any bad news out of that so far. Could you provide any update you might have? |
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We are running an experiment, and gradually expanding its scope. There were no bugs logged yet. If there are no bugs logged by November we plan to start the shipping process. We believe the major risk will be around clientX/clientY being fractional. If there is any breakage, we plan to have a flag in the code to return clientX/clientY as long but keep click/auxclick/contextmenu events as PointerEvent. |
- remove the requirement for positive pointerId which was not backwards-compatible (and I couldn't find reference to this change in minutes from PEWG meetings around that time) - add mention of special case for zero pointerId (reusing some of the language from later on about PointerEvent stream)
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@smaug---- @mustaqahmed @NavidZ @liviutinta one final review ... we happy with the latest wording/changes on this? |
| @@ -313,7 +313,7 @@ <h2><code>PointerEvent</code> Interface</h2> | |||
| <dl data-dfn-for="PointerEvent" data-link-for="PointerEvent"> | |||
| <dt><dfn>pointerId</dfn></dt> | |||
| <dd> | |||
| <p>A unique identifier for the pointer causing the event. This identifier MUST be unique from all other <a data-lt="active pointer">active pointers</a> in the <a>top-level browsing context</a> (as defined by [[HTML]]) at the time. A user agent MAY recycle previously retired values for <code>pointerId</code> from previous active pointers, if necessary.</p> | |||
| <p>A unique identifier for the pointer causing the event. This identifier MUST be unique from all other <a data-lt="active pointer">active pointers</a> in the <a>top-level browsing context</a> (as defined by [[HTML]]) at the time. The <code>pointerId</code> value of zero is reserved to indicate events that were generated by something other than a pointing device. A user agent MAY recycle previously retired values for <code>pointerId</code> from previous active pointers, if necessary.</p> | |||
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"value of zero is reserved to indicate events that were generated by something other than a pointing device." seems like backwards incompatible change.
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You are right. But the reason we chose that was no other implementation uses 0 that at this point. So we believe it should be safe to do so now. Otherwise, technically all the numbers are valid in pointerid space. Actually now that we are at it for breaking compat we can force all valid pointerid ones to be positive numbers (again something that the current implementations already do AFAIK) so maybe we can reserver those negative numbers for other future features or something.
Having said that, unless we add yet another field to the prototype to indicate non-pointing device I cannot imagine a way to be fully backward compatible.
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Good point...looks like we assumed pointerId must start with 1. After your comment, I realized this behavior is mentioned only in the Note below. I will file an issue now.
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There seem to be tests for this. _is_a_pointerevent... |
This is the followup change to WHATWG html spec and ui events spec pull requests to change the type of click, auxclick, and contextmenu events to pointerevents:
Closes #100
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