VIM-NVIM

to upper case, to lower case

Go to visual mode (v), then select text, then press U for uppercase, press u for lowercase.

plugin

macro

qd 	start recording to register d
... 	your complex series of commands
q 	stop recording
@d 	execute your macro
@@ 	execute your macro again

scroll without moving cursor

z t ...or... z enter --> moves current line to top of screen
z z ...or... z . --> moves current line to center of screen
z b ...or... z - --> moves current line to bottom

scroll

https://stackoverflow.com/a/60607857/9077311

+-------------------------------+
^                               |
|c-e (keep cursor)              |
|H(igh)             zt (top)    |
|                   ^           |
|           ze      |      zs   |
|M(iddle)  zh/zH <--zz--> zl/zL |
|                   |           |
|                   v           |
|L(ow)              zb (bottom) |
|c-y (keep cursor)              |
v                               |
+-------------------------------+

markers (bookmark)

 m<a-zA-Z>      - save mark
 '<a-zA-Z>      - move to mark
 d'<a-zA-Z>     - delete from current position to mark <a-zA-Z>

example:
let us say I am on line 30
press ma to mark line number 30
scroll to say line 100
now to go back to line 30, press 'a
\a` (a) takes you to exact cursor position

a-z works within single file, where as A-Z works between files

editing in a stream

find . | vim -

jump list, tag list

C-o for jump list
C-t for tag list

jump to the next word as of current

* is used to jump to the next matching word as of current word under the cursor. Followed by n will move the cursor to next matching word (N for opposite direction).

using vimscript inside lua

local result = vim.api.nvim_exec(
[[
  " vim script here
  nmap <leader>mp <Plug>MarkdownPreviewToggle
]],
true)

debugging

debugging php

TLDR: install xdebug extension for php and configure it in php.ini. in nvim, install vscode php debugger using mason and configure it to listen on port 9003.

php debuging setup is bit confusing to understand, so let take an example to get more clarity. Let us say we have a php source code in hello.php. and we can run this code using php executable like php hello.php. So now understand how to debug hello.php. First step is we will open hello.php in nvim. we will press F5 (debug continue) which will start the "vscode php debugger". This "vscode php debugger" will start listening on port 9003. Now in any terminal, if we run the php program like php hello.php, the php command will first load the ini file (which we can locate by php --ini). This ini file has details related to xdebug extension. It will start xdebug. xdebug will try to connect to "vscode php debugger" using host and port provided in the ini file. "vscode php debugger" will accept the request from xdebug. Now the php will starts executing the code in hello.php and stops when it hits the breakpoint. Congratulations!! now you now how it works :) .

Here is detailed instruction to set it up:

Install the xdebug using the instruction provided here: https://xdebug.org/wizard

Add the following to the php.ini file (lotate ini file using php --ini)

; for debugging
zend_extension=path/to/xdebug

[Xdebug]
xdebug.mode = debug
xdebug.start_with_request = yes
xdebug.remote_host=localhost
; it seems like xdebug use port 9003 even if provide port value as 9000
xdebug.remote_port=9000
xdebug.remote_enable=1

Configure vscode php debugger (the debug adapter)

dap.adapters.my_php_adapter = {
  type = 'executable',
  command = '/home/es/.local/share/nvim/mason/packages/php-debug-adapter/php-debug-adapter',
}
-- configure
dap.configurations.php = {
  {
    type = 'my_php_adapter',
    request = 'launch',
    name = 'waiting for Xdebug to ping me',
    port = 9003
  }
}

vim spell check with camelcase

spell check with camelcase support: https://github.com/kamykn/spelunker.vim

installing packer

link: https://github.com/wbthomason/packer.nvim

git clone --depth 1 https://github.com/wbthomason/packer.nvim ~/.local/share/nvim/site/pack/packer/start/packer.nvim

search & replace in entire file

:%s/foo/bar/g

increment numbers

increment sinlgle value: v and select the number we want to increment andpress press ctrl+a
increment a column of vlaues with each row having one value higher than previous row: ex:

0
0
0

=== to ===>

1
2
3

first select the column using ctrl+v and down arrow. then g followed by ctrl+a

switch to previous buffer

<Ctrl-^>

tab

:tabnew, :0tabnew, :$tabnew ./temp.txt

                       current
                        tab
                         |
 _____ ______ ______ ____*____ ______ ______
|_____|______|______|_________|______|______|
^-.                 ^-.       ^-.    ^-.    ^--- :$tabnew
  `- :0tabnew         |         |      |
                      |         |      `- :+tabnew
                 :-tabnew       `- :tabnew
                                   :.tabnew

missing features

vscode like smart selection missing
- vscode shortcuts:
```
editor.action.smartSelect.expand
editor.action.smartSelect.shrink
```
- plugin terryma/vim-expand-region tries to implement this. But it is not smart enough to expand to function header after function body.

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