> With this option, you don't need to bother switching which window has diff
> turned on; you can just look at whichever one you need and it will show how
> it differs from the single master window.
I think it is sometimes useful but sometimes not.
I can see which lines are different just between 2 windows
among several ones, but can not see what is exactly different
only on one window.
diff-fold may be widely common among all diff mode windows.
diffget/diffput may not be allowed because more than 2 windows
are still in diff mode. So I still use diffthis/diffoff to switch
and compare between 2 windows.
To generally see which lines are different,
it can be used with a sample plugin like below.
Set t:diffmaster variable with a window number and execute it
on a window to be compared. Then sign comes up.
This is restricted only on the changed lines on the same line.
let mw = gettabvar(tabpagenr(), 'diffmaster')
if empty(mw) | finish | endif
let ct = [hlID('DiffChange'), hlID('DiffText')]
let dl = []
for l in range(1, line('$'))
if index(ct, diff_hlID(l, 1)) != -1 && getline(l) !=
getbufline(winbufnr(mw), l)[0]
let dl += [l]
endif
endfor
if !empty(dl)
sign define diff text=> texthl=Search
for l in dl
exe 'sign place ' . l . ' line=' . l . ' name=diff buffer=' .
bufnr('')
endfor
endif
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