vimrc - RicoJia/notes GitHub Wiki

source it: :so % #so means source, % means this file
- or reload it by opening and reopening the file
help usr_05.txt #useful user manual for vimrc
settings
clipboard: if
- set clipboard = unmmaped
- If this doesn't work for u, download vim-gtk and vim-gnome
non-compatible: not the original vi settings

file type:

:filetype plugin indent on    #turn on file type detector, plugin (go detector, etc. )
:filetype detect  #set to python
set filetype?

syntax highlighting

leader key

  https://medium.com/usevim/vim-101-what-is-the-leader-key-f2f5c1fa610f

I/O
- set VAR? to get the status of the variable.

Rationale

set ruler = :set ruler , this is called a setting
- On and off:
  - :set SETTING
  - :set noSETTING
  - :set SETTING! THis is to toggle a setting
- values
  - help SETTING: See choices of a setting:
  - set SETTING&: to set the default values
- :set SETTING? to check the settings
  - :set will only display settings with non-default vals
  - :h option-list will display the options
color scheme
- placed at ~/.vim/colors

mapping

 Enter: <CR>, <Enter>, <Return>
 Escape: <BS>
 <Up>, <Down>, <Left>, <Right>
 <Insert>, <Del>, 
 <Home> <End>
 <PageUp> <PageDown>
 <Tab>
 <Bar>	'|'
 <C-X>

 - You can put in common patterns into vimrc as well!
 - ```let mapleader=","```
 - ```:map``` :see mappings

replacing
- Once you replace a file with something new, You might not be able to see the change
  - :e is how you reload it.
  - mkvimrc allows you to overwrite .vimrc with the current settings.
- key syntaxes whitespace, even if you just do , it still counts!!
- Additional
  - Modeline: You may want a specific type of file to have specific settings. So at the top/end of the file, do /* vim: set ts=8 sw=4 tw=0 noet : */, notice that spacing and colons are important here.

Syntax (refer to this when necessary)

Basics

\$ means the last line, \. means the current line in : commands

mappings

nmap :NERDTreeToggle: so you can run C-f directly on vim.
<C-S-v> and <C-v> are really the same.
let is used to set variables
- let VAR='<Enter>'
- let VAR='<c-t>' #this is for mapping certain keys
means backslash
:verbose nmap ... this helps debug keybindings!!
determine the default position of cursor, from the end of line nnoremap <Leader>r :%s///g<Left><Left><Left>
map <S-k> <Nop> you can disable a mapping like this.
xnoremap j mode() ==# "v"? "c```jk" : "kj" //remappiong j in different modes.
1. xmap is for visual mode only, vmap is for visual and select
2. If you want to create something specifically for visual line mode, do this:
```
xnoremap <expr> j  mode() ==# "v" ? "gj" : "j" 
```
3. <expr> is to invoke a vim function. see help mode() for all modes

Functions

call a function on an event
- autocmd QuitPre * exec 'FloatermKill!
  - exec means to call the plugin command
  - QuitPre is quite useful
- autocmd QuitPre * call VIM_COMMAND
| is command separator
References
- Remapping tutorial
- good youtube
copy word under cursor to command:
```
 :vs <C-R><C-W><CR>
```

Low Level Details

CTRL - generates keycode of char - 64 (All ASCII)
- So CTRL-I = TAB
- < has ASCII code 60, so CTRL-< is impossible
is for <, > is fine

Plugins

Vundle & vim-plug

 get vundle: plugin manager. Get that!  
vim plugin: curl -fLo ~/.vim/autoload/plug.vim --create-dirs   https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

Use vim-plug:

- add plug line, 
- restart vim
- PlugInstall
- Remove the pluglin
- restart vim
- PlugClean
- PlugUpdate    #update all plugins

vim has default .vimrc, even if it's deleted

ag:
- you need silver searcher
File Explorers (generate a new buffer for u)
- netrw
  - Stores in buffer as a hidden buffer file
  - ```
    	:e .  #to see all files 
    d DIR_NAME  # make a new direcotry
```
- I use nerdtree + ctrlp
  - ctrl+p is to search for a file, if there are so many of them.
  - ctrl+t is to open file in ctrl + p
- nerdtree - Great references - repo - Nerd Tree List - - is enter nerd tree - I've set up auto start - m is to show list. You can create, delete files easily - I've remapped F2 as the quick way of opening/hiding nerd tree - I is to see the hidden directories - q is to close the nerd tree window - File Nav - o is to open and close - x is to close the current node. - Within a directory - P is root (current cwd, the top one in orange) - p is the the parent directory - K is to jump to the top of the current list - J is the last node - U, u is to move tree root up a dir. - C is to select the current dir
  - t is to open a file in new tab - R is to refresh. - F toggle whether files are used. (you need to hit F again to re-enable it) - Help - :help NERDTree-TOPIC - ? opens the key binding menu
  - if nerd tree says "1 file cannot be loaded", it's probably file permissions.
Code Snippets
- Fzf uses ultisnippets, really handy. You type the name of the snippets, in Fzf, then hit tab. Note, space not allowed.
- UltiSnippets is the engine, vim-snippets provides all the rules. If you want to customize, go to ~/.vim/plugged/vim-snippets/UltiSnips to change
- add another filetype to UltiSnips:
  1. set filetype? to see filetype in vim. If there's nothing, au BufRead,BufNewFile *.launch set filetype=xml
ctags
- install like here vim - follow this link
- usage: generate a tags file in the root, ctags -R .

fzf
- exclude searches that contains a word: !word
- exlude searches that start with a word !^word
- :History is to see most recent files.
coc
- python: CocInstall coc-python coc-pyright coc-json
```
   pip3 install -U jedi-language-server
   sudo apt install python3-venv
```
- cocconfig: add: "python.setInterpreter": "/usr/bin/python3", "python.linting.enabled": true
- Basic operations:
  - gd for defintion, ctrl-o

vimrc - RicoJia/notes GitHub Wiki

Rationale

Syntax (refer to this when necessary)

Basics

mappings

Functions

Low Level Details

Plugins

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