Add support for on demand folding

[adament]

If this is activated vim only recalculates fold upon user request. Hence this should make editing large files a bit easier since it no longer slows down exiting insert mode.

[lervag]

Seems like a good idea. Thanks!

Just one thing: I've been working on big files several times (up to about 100 pages theses and reports), and I really don't experience the lag that may be several seconds long after exiting insert mode. It would be interesting to see an example of this.

[adament]

I have a noticable lag(so probably somewhere around 0,5-1 second) on a 30 page, ~2000 line document on my desktop(i7-4770) and it felt like a few seconds on my four year old laptop(I counted to around 4-5). I have just copied and pasted the main contents 9 times, to simulate a file of 10 times the length and I measured input mode exit time to 4 seconds on my desktop. I run vim 7.4.373 on Arch Linux.

I have uploaded the document here: http://adament.net/dela.tex.

[lervag]

Thanks! I notice the delay now, even though it is only in the order of 0.5 seconds (on a chromebook c720p, dual core Intel Celeron 2955U @ 1.4 GHz). Still, I think I might like your approach better than the automatic! Thanks!

[lervag]

Update: I hope you don't mind that I copied your idea to vim-latex.

[Konfekt]

Have a look at https://github.com/Konfekt/FastFold

[Konfekt]

Have a look at https://github.com/Konfekt/FastFold

[adament]

Oh I hadn't seen your plugin I also considered refolding on saves but I think I save more often than I refold. Lervags idea of remapping zx is really neat, no need to introduce a new extraneous mapping.

[lervag]

@Konfekt FastFold seems interesting. Should have known about it earlier, though. I feel we already have a working good method in LaTeX-Box as per now (at least things work well for my sake).

@adament Thanks, I found it more natural to just remap zx instead of creating new mapping. Might make that change to LaTeX-Box as well when I get the time.

[Konfekt]

Yep, that's another idea to update on invoking one of the fold maps starting with z... I found it too intrusive for a plugin though to remap all of them.

I had the same problem as the thread opener that there was a one second lag when leaving insert mode. This is discussed on the wikia page.

Even in small tex documents. Perhaps due to the conceal feature.

[lervag]

Ah, ok, I don't use the conceal feature.

I don't remap all the z mappings, only zx. zx is supposed to refresh and recalculate folds, so it only makes sense to remap it to ensure that the folds are really recalculated.

[adament]

Perhaps zX too since it's also supposed to recalculate folds?

Den 25/07/2014 kl. 08.05 skrev Karl Yngve Lervåg notifications@github.com:

Ah, ok, I don't use the conceal feature.

I don't remap all the z mappings, only zx. zx is supposed to refresh and recalculate folds, so it only makes sense to remap it to ensure that the folds are really recalculated.

— Reply to this email directly or view it on GitHub.

[lervag]

Yes, that's right.