On Sunday, September 1, 2013 6:42:25 PM UTC-7, Geoff Greer wrote:
> This patch adds asynchronous functions to vimscript. If you want to perform
> an action in 700ms, simply:
>
> let timeout_id = settimeout(700, 'echo("hello")')
>
> To cancel the timeout before it's fired:
>
> canceltimeout(timeout_id)
>
> setinterval() also returns an id that can be used with canceltimeout.
>
> The reason for this patch is simple: asynchronous functionality is needed to
> implement real-time collaborative editing in Vim. This is one of the most
> voted-for features (see http://www.vim.org/sponsor/vote_results.php).
>
> Along with Matt Kaniaris, I founded Floobits to build real-time collaboration
> into every editor. We wrote a plugin for Vim, but we had to use hacks to get
> async behavior (abusing feedkeys or client-server). These methods had
> side-effects such as breaking leaderkeys or other shortcuts. After a lot of
> experimenting, we decided to try patching Vim.
>
> Since Vim is character-driven, we had to munge some low-level input functions
> to get the desired behavior. We changed gui_wait_for_chars() and mch_inchar()
> so that call_timeouts() is run every ticktime milliseconds. The default
> ticktime is 100ms.
>
> This patch isn't finished yet, but it works on unix-based OSes. If the
> reaction is positive, our intention is to change mch_inchar() (or something
> similar) in other OS-specific files. That will get async functions working
> for everyone.
>
> Even if our patch isn't the best approach, we'd love to help get async
> functions in Vim. Doing so will open the door to a lot of cool plugins.
>
> Oh, and this is the first time either myself or Matt have submitted a patch
> to Vim, so please be gentle.
>
> Sincerely,
>
> Geoff Greer
Dear God, I really want to see this in action. I could imagine JavaScript
somehow playing a role in this...
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