Switch to parent-based context. Fixes #2112.

[jimfb]

Switch to parent-based context. Fixes #2112.

[sophiebits]

Can we add a new test that would have failed with owner-based context?

[jimfb]

Yep, good idea, done.

[mridgway]

Seems like ReactElement._context and ReactContext should be removed since they are no longer used with parent contexts.

[jimfb]

@mridgway That's a super easy change, but I'd like to separate functional changes from cleanup changes (which don't affect functionality) to make code reviews easier. That way, someone has a chance of actually understanding what's going on in any given commit (removing _context will touch a bunch of lines, making it harder to read the PR). If @spicyj would like it to be part of the same commit, I'll go ahead and amend.

[sophiebits]

Having all the cleanup in one commit is preferable to me.

[jimfb]

Ok, easy money, done.

[mridgway]

If you do the cleanup in a separate commit and revert this change then the reverted changes won't function correctly unless you revert the cleanup as well. Seems like it creates unnecessary dependencies between commits.

[jimfb]

Cherry-picking reverts can be exceedingly difficult anyway, because people inevitably touch the same code (especially when you have huge commits, you're likely to overlap/conflict somewhere, and merging commits exacerbates the problem). So it's a loose-loose situation.

Regardless, it's a style difference, I don't have a strong preference either way, already fixed it as per @spicyj.

[sebmarkbage]

I kind of prefer functional changes in a separate commit too, although since PRs allow multiple commits they could be merged.

Accepted, but DON'T land until we've solved the layers issue since that will get this reverted.

[gaearon]

What's the issue with layers? Can I read about it somewhere?

[sebmarkbage]

Nope, it is an internal FB issue.

[sebmarkbage]

Basically, there is no way to pass a context to a new subtree - which was also true before but some people hacked around it so we have to undo those hacks.

[gaearon]

Ah, the mystical ReactLayer from @chenglou's gists.

[jimfb]

Layer issue is solved, pending a final review and sync with www.

[sebmarkbage]

Well ideally we should land that (and prepare the callers) first since we won't be able to sync React internally now.

On Apr 9, 2015, at 1:21 PM, Jim notifications@github.com wrote:

Layer issue is solved, pending a final review and sync with www.

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Reply to this email directly or view it on GitHub.

[skiano]

@jimfb

I am excited about this feature, so I built react at 7d44917.

On that commit, I can use parent based contexts (as I see in the unit test that was added)

However, I when I try v0.13.3 I can't seem to get it working.

Was this reverted or changed between then and now?

[sophiebits]

0.13.3 only includes 0.13 plus individually cherry-picked commits; 0.14 will include everything that's currently in master.

[skiano]

Thanks for the info,

Sorry if this info is elsewhere, but does anyone have an idea about how soon 0.14 might go out?

[sophiebits]

After the things in #3220 get done.

[mjackson]

Just wanted to say THANK YOU to @jimfb and everyone else who worked on this change. This feels like the right way to go.