vim-keymap.txt

some notes for daily vim usage

copy the cmd output
redir @* | echo &guifont | redir END


copy/paste and repeat

yiw  copy word, yi"  copy inner 

ciw ^R0   (change word with register 0)

.  (repete)

Line:
Vp select 2nd line, replace with yank
V"0p  3rd line and replace with 1st

word count g^g

run plug function

:execute "normal \<Plug>NiceCenterCursor"


execute "normal \<Plug>CamelCaseMotion_iw"

" highlight"
echo "hi<" . synIDattr(synID(line("."),col("."),1),"name") . '> trans<' . synIDattr(synID(line("."),col("."),0),"name") . "> lo<" . synIDattr(synIDtrans(synID(line("."),col("."),1)),"name") . ">"


replace with clipboard

ciw^r0 (yiw if not in first char)  and then repeat with .

search and replace 
args `grep Neovim -l -r .` or args `rg Neovim -l`

argdo %s/Neovim/Nvim/ge | update

with register and clap
:cfdo %s/<C-r>s/blabla/ge \| update

replace from current line
:,$s/old/new/c

Note: use `cdo` is better
:cdo[!] {cmd} - Execute {cmd} in each valid entry in the quickfix list.
:cfdo[!] {cmd} - Execute {cmd} in each file in the quickfix list.
:ld[o][!] {cmd} - Execute {cmd} in each valid entry in the location list for the current window.
:lfdo[!] {cmd} - Execute {cmd} in each file in the location list for the current window.

set grepprg=rg\ --vimgrep\ --no-heading\ --smart-case
set grepformat=%f:%l:%c:%m
grep whatever
cfdo %s/Neovim/Nvim/ge | update


:grep -r -l 'foo'
:cfdo %s/foo/bar/g|w

cfdo %s/float_win/floating_win/gc|w

cfdo %s/floatinzrg_win/float_win/gc|w


How to see which plugins are making Vim slow?
You can use built-in profiling support: after launching vim do

:profile start profile.log
:profile func *
:profile file *
" At this point do slow actions
:profile pause
:noautocmd qall!
"startup time"
vim --startuptime timeCost.txt timeCost.txt


"log all event"

Building on the answers that suggest using Vp or VP to paste over a line -- to avoid changing the contents of the yank register I find the most ergonomic command is simply:

VPY


debug vim profile
https://codeinthehole.com/tips/debugging-vim-by-example/#why-is-action-slow

change file type hl `set ft=json`
wc in visual   g<C>g
python prettier    :%!jq    (%! means use file as stdin)

repeat 
@@
.

command history:    q:
If you always want to use the command editing window, try these mappings:

nnoremap : q:i
nnoremap / q/i
nnoremap ? q?i

Using "finish" stops Vim from reading the rest of the file, it's much quicker
than using if-endif around the whole file.

let [s:plugin, s:enter] = maktaba#plugin#Enter(expand('<sfile>:p'))
if !s:enter
  finish
endif

Here is a TDD recipe for a small project. No plugins used:
nvim feature.py
Split a new terminal vertically

:vsp | :terminal
Get the terminal's job id.

<C-[>
:echo b:terminal_job_id
3
Switch to the other window

<C-[>
<C-w>w
Add an autocmd that sends a command to the terminal to run the tests. The job id is used here.

:au BufWritePost <buffer> :call jobsend(3, "\<C-c>clear\<CR>python3 feature_test.py\<CR>")
# do tdd
Clean up the buffer's autocmd. Run on the code window.


 replace the term currently under the cursor 
%s/<c-r><c-w>/new value/g       "c-r, c-w insert word under cursor"
or use * , the substitute command uses the last searched one.
and %s//new value/


color=$( convert filename.png -format "%[pixel:p{0,0}]" info:- )
convert filename.png -alpha off -bordercolor $color -border 1 \
    \( +clone -fuzz 30% -fill none -floodfill +0+0 $color \
       -alpha extract -geometry 200% -blur 0x0.5 \
       -morphology erode square:1 -geometry 50% \) \
    -compose CopyOpacity -composite -shave 1 outputfilename.png