Implement highlighting of evaluated code

[gusano]

This is the first time I try to write vimscript ever so please bear with me if I did something stupid : )

This implements highlighting of evaluated code (line or block) (term=reverse cterm=reverse so everyone is happy! ;)
It has to be enabled with let g:scFlash = 1 in your .vimrc.

It works but it looks like there's a small delay between code evaluation and highlighting..
Could it be because of vim redrawing?

Any hints or suggestions are more than welcome!
Please test it!

ps: the changed files have mixed indention styles so I tried my best to not mess it up, but new code uses spaces, sorry :)

Fix #12
Fix sbl/scvim#42

[eirikblekesaune]

The sluggishness could be that the sleep function freezes the execution. (?)
Maybe you could try the new asynch timer in Vim8 instead?

Something like:

let highlightTimer = timer_start(150, 'clearmatches')

[gusano]

@blacksound thanks that's definitely better!

[eirikblekesaune]

Maybe it would be good to add a version detect for this, so that we keep compatibility with Vim < 8.0? v:version is commonly used to find the running version of vim, and the version value for vim 8 is 800.
If the user is running v:version < 800 we call sleep, else the timer_start is used.

A quick look at the vim source code also suggests that the "timers" attribute is set if the version is compiled with timers, so you could try an alternative check with has("timers"), and see if that works.

[gusano]

@blacksound Thanks, much appreciated!

[eirikblekesaune]

Small typo 'introduced'

[gusano]

@blacksound Fixed!

[gusano]

Anyone tested that one? I find it pretty useful, even if it's a bit laggy.. I'd love to know if that works on osx.

[bagong]

Hi @gusano,

I gave it a try on MacOS Sierra/iTerm2/homebrew vim 8 (had to think about how to get that PR into my setup first ;). Solved it with doing in .vim/bundle/scvim:

git checkout origin pull/21/head:highlight
git checkout highlight

)

With light testing I can say it seems to work well in my setup. Thanks!

[gusano]

@blacksound bump =)

[eirikblekesaune]

Sorry for the delay. Merging now.

[K0F]

It works great! Thanks a lot for small - yet very important improvement.

[gusano]

@K0F welcome = )