Sunday, January 28, 2018

Vim Configuration

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Vim is a highly configurable text editor built to make creating and changing any kind of text very efficient. It is included as "vi" with most UNIX systems and with Apple OS X.

The NERDTree and NERDTreeTabs plugins make Vim much easier to use. My .vimrc file is listed below. Put it in ~/.vimrc.


" URL:
" Authors:
" Description: A minimal, but feature rich, example .vimrc. If you are a
"              newbie, basing your first .vimrc on this file is a good choice.
"              If you're a more advanced user, building your own .vimrc based
"              on this file is still a good idea.

" Features {{{1
" These options and commands enable some very useful features in Vim, that
" no user should have to live without.

" Set 'nocompatible' to ward off unexpected things that your distro might
" have made, as well as sanely reset options when re-sourcing .vimrc
set nocompatible

" Attempt to determine the type of a file based on its name and possibly its
" contents. Use this to allow intelligent auto-indenting for each filetype,
" and for plugins that are filetype specific.
filetype indent plugin on

" Enable syntax highlighting
syntax on

" Must have options {{{1
" These are highly recommended options.

" Vim with default settings does not allow easy switching between multiple files
" in the same editor window. Users can use multiple split windows or multiple
" tab pages to edit multiple files, but it is still best to enable an option to
" allow easier switching between files.
" One such option is the 'hidden' option, which allows you to re-use the same
" window and switch from an unsaved buffer without saving it first. Also allows
" you to keep an undo history for multiple files when re-using the same window
" in this way. Note that using persistent undo also lets you undo in multiple
" files even in the same window, but is less efficient and is actually designed
" for keeping undo history after closing Vim entirely. Vim will complain if you
" try to quit without saving, and swap files will keep you safe if your computer
" crashes.
set hidden

" Note that not everyone likes working this way (with the hidden option).
" Alternatives include using tabs or split windows instead of re-using the same
" window as mentioned above, and/or either of the following options:
" set confirm
" set autowriteall

" Better command-line completion
set wildmenu

" Show partial commands in the last line of the screen
set showcmd

" Highlight searches (use <C-L> to temporarily turn off highlighting; see the
" mapping of <C-L> below)
set hlsearch

" Modelines have historically been a source of security vulnerabilities. As
" such, it may be a good idea to disable them and use the securemodelines
" script, <>.
" set nomodeline

" Usability options {{{1
" These are options that users frequently set in their .vimrc. Some of them
" change Vim's behaviour in ways which deviate from the true Vi way, but
" which are considered to add usability. Which, if any, of these options to
" use is very much a personal preference, but they are harmless.

" Use case insensitive search, except when using capital letters
set ignorecase
set smartcase

" Allow backspacing over autoindent, line breaks and start of insert action
set backspace=indent,eol,start

" When opening a new line and no filetype-specific indenting is enabled, keep
" the same indent as the line you're currently on. Useful for READMEs, etc.
set autoindent

" Stop certain movements from always going to the first character of a line.
" While this behaviour deviates from that of Vi, it does what most users
" coming from other editors would expect.
set nostartofline

" Display the cursor position on the last line of the screen or in the status
" line of a window
set ruler

" Always display the status line, even if only one window is displayed
set laststatus=2

" Instead of failing a command because of unsaved changes, instead raise a
" dialogue asking if you wish to save changed files.
set confirm

" Use visual bell instead of beeping when doing something wrong
set visualbell

" And reset the terminal code for the visual bell. If visualbell is set, and
" this line is also included, vim will neither flash nor beep. If visualbell
" is unset, this does nothing.
set t_vb=

" Enable use of the mouse for all modes
set mouse=a

" Set the command window height to 2 lines, to avoid many cases of having to
" "press <Enter> to continue"
set cmdheight=2

" Display line numbers on the left
set number

" Quickly time out on keycodes, but never time out on mappings
set notimeout ttimeout ttimeoutlen=200

" Use <F11> to toggle between 'paste' and 'nopaste'
set pastetoggle=<F11>

" Indentation options {{{1
" Indentation settings according to personal preference.

" Indentation settings for using 2 spaces instead of tabs.
" Do not change 'tabstop' from its default value of 8 with this setup.
set shiftwidth=2
set softtabstop=2
set expandtab

" Custom Settings

" Shortcuts to switch between multiple tabs.
map <C-t><up> :tabr<cr>
map <C-t><down> :tabl<cr>
map <C-t><left> :tabp<cr>
map <C-t><right> :tabn<cr>
nnoremap <C-Left> :tabprevious<CR>
nnoremap <C-Right> :tabnext<CR>
nnoremap <silent> <A-Left> :execute 'silent! tabmove ' . (tabpagenr()-2)<CR>
nnoremap <silent> <A-Right> :execute 'silent! tabmove ' . (tabpagenr()+1)<CR>

" Uncomment this if using a Mac.
execute "set <M-A>=\e[A"
execute "set <M-B>=\e[B"
execute "set <M-b>=\eb"
execute "set <M-f>=\ef"
map <M-A><up> :tabr<cr>
map <M-B><down> :tabl<cr>
map <M-b><left> :tabp<cr>
map <M-f><right> :tabn<cr>
nnoremap <M-b> :tabprevious<CR>
nnoremap <M-f> :tabnext<CR>

" This tip is for loading project files that you know the names for, but do not remember their paths.
" Use :find filename.ext to find the file. 
" For linux systems use path=$PWD/**.
" For windows systems use set path=.\**
set path=$PWD/**.

" Wildmenu enables a menu at the bottom of the vim/gvim window.
set wildmode=list:longest,full

" NERDTree related
execute pathogen#infect()
call pathogen#helptags()

" Start NERDTree-Tabs on startup.
let g:nerdtree_tabs_open_on_console_startup=1

" NERDTree-Tabs open/close nerdtree window.
map <Leader>n <plug>NERDTreeTabsToggle<CR>

" NERDTree-Tabs switch to/from nerdtree window.
map <F1> <plug>NERDTreeFocusToggle<CR>

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