Strategy to detect VIM mode? - vim

I aim to write a deamon which will change the lighting of my keyboard if VIM is in Insert Mode, or if VIM is in command mode.
I am stuck on considering how I could extract the information about what mode VIM actually is in at any given time. I have tried investigating all files in the /proc/ folder associated with a running VIM process, but have no found anything that could give insight as to what mode the editor currently is in.
I am aware that you can have VIM run a command with a setting in you ~/.vimrc as so:
autocmd InsertEnter * checktime
...but I am not sure how I could use this to programmatically (language is irrelevant right now) change state based on VIM mode.
Thank you.

Related

Can I send commands to an already open tmux session?

I've started using vim a couple of months ago and I'm loving it. I mostly code on a vim pane (using iTerm2 on OS X) and I keep an ipython console running inside a screen session on another pane. I've managed to find a way to send lines of code or even the whole script from vim to execute on the ipython console, but I don't know if this is possible with tmux. Everyone else is telling me to change from screen to tmux (which actually seems like good advice, in light of tmux's features) but before taking the leap I wanted to make sure this is possible.
Based on the answer/tip by byaruhaf, I've managed to send commands to an already open tmux session. I thought I'll add here a small how-to so that everyone else can take advantage of this.
I installed vim-tmux-runner and edited my .vimrc file in the following way:
let g:vtr_filteype_runner_overrides = {
\ 'python': '%run {file}' }
augroup Pythonic
autocmd!
autocmd FileType python nmap <leader>l :VtrSendFile<CR>
autocmd Filetype python xmap <leader>l :VtrSendLinesToRunner<CR>
augroup END
Let me explain this a bit. The first autocmd line allows one to hit <leader>l in NORMAL mode and have vim-tmux-runner send '%run {filename}' to a tmux session in which an ipython session is running (this is my workflow). Note that the 'let' line on top is the one which sets the command to be run by VtrSendFile to be '%run'. (On that same line, please note that "filteype" is not a typo, it works like this and not with "filetype").
The second autocmd line allows one to select a few lines in vim and, while in VISUAL MODE hit <leader>l and send those lines to a tmux ipython session.
As pasting code in ipython can be tricky, there are other options that might be of use in this case, just check the docs on vim-tmux-runner for more info.
Thanks byaruhaf for the great tip.
Yes it is possible to send commands to an already open tmux session.
i recommend you use this plugin vim-tmux-runner . you can see this Vim & Tmux video for a demo of the plugin by Jack Franklin

jumping with Ctrl-] in vim does not work

I am working with vim on debian.
When I press ctrl-] vim beeps, inserts a new line and goes to "visual block". It does not jump to tag. The same happens with :ctrl-]. Even in insert-mode with ctrl-] vim exits from insert-mode, insert new line and goes to 'visual block'.
But when I use such lines in .vimrc
nnoremap <F3> <c-]>
vnoremap <F3> <c-]>
jumping with F3 works.
Command :verbose map c-] returns No mapping found
update:
As we have discovered in insert mode we can see how vim is interpreting <c-]>. In insert mode after <c-V><c-]> the correct output should be ^] . But my output is
t
^C
Screenshots: after <c-v> I get
And after <c-v><c-]> .
So vim isn't receiving the keystrokes properly. How to check what changes input?
try running vim -u NONE to check if that's happening without any configuration, that way you can be sure it's not a mapping or misconfiguration.
if that solves the issue, check your vim configuration!
Also try doing it in gvim and gvim -u NONE to narrow down the issue to what it's very likely to be. If that works it's a shell or terminal misconfiguration.
if it still fails in the windowed GUI of vim, that means this is X that is wrong, try using xev to see what your key outputs, and xmodmap to printout the values assigned to all your keys on your keyboard layout.
Try using another terminal (like urxvt, gnome-terminal, xterm or the raw linux console), to determine whether it's a terminal emulator misconfiguration of your keys or if it's your shell.
if it's your terminal emulator, then get through the configuration or reset its configuration, there's something setup that shouldn't have been.
Try changing shell to see if that improves (by I doubt it will)… And add the following configuration files in your home directory:
.inputrc
Tab: complete
set meta-flag on
set input-meta on
set output-meta on
set convert-meta off
If that's not enough, you might want to check as well you stty settings for your current shell as well.
If none of that helps, then… take a big hammer and hit very hard your keyboard and your computer, that won't solve your situation, but you'll feel better!
HTH

How do I start vim in insert mode?

Whenever I enter vim, there are 99% chance that I will go in insert mode and edit the file. Can I make vim always start in insert mode?
You can start vim like this:
vim -c 'startinsert' FILENAME
If you want, you can edit the .bashrc file (if you are using bash) and add this line:
alias vim="vim -c 'startinsert'"
You can use vim +star, which is even shorter. NB: star is short for :help :start.
If you want this behavior by default, the best option is to add the line
autocmd BufRead,BufNewFile * start
into your ~/.vimrc. Also take a look at :h 'insertmode', which outlines a special option made for this kind of functionality. However, it can make it difficult to get out of insert mode which is crucial for growing in your vim ninja skills.
You can, and it's very simple.
The :startinsert command enters insert mode. (It is the exact command-line-mode counterpart to typing i in normal-mode.) Just drop it into your vimrc so it runs at startup. Unlike some of the other suggestions, this doesn't interfere with dropping back to normal-mode by ESC as normal.
Additionally, there's something called "Easy mode", started from vim -y or evim. It's a more radical departure than just starting in insert mode: it has some key bindings matching other editors', and normal-mode commands are done by hitting Ctrl+O instead of Esc. As a consequence of that, being in insert mode is the rule rather than the exception.

Can I manually rerun vim's filetype detection?

The Kate editor has a nice feature: When you're saving a file, it will rerun its filetype detection. Suppose you want to create a new script in ~/bin, so you say
kate ~/bin/myscript
Then type e.g. #!/usr/bin/env perl and save. In this moment, Kate will recognize that we're talking Perl, and load the syntax highlighting.
In Vim, I thought I could build something similar by means of an autocommand, but I'm stuck with the command that's being executed. I don't see a distinct command for rerunning the filetype detection. It's run by :edit, so I could say
autocmd BufWritePost * :edit#
But that's rude: It esp. loses the undo history, cursor positions, etc. Is there a better solution?
Well there's a command for that:
:filetype detect

How do I run a terminal inside of Vim?

I am used to Emacs, but I am trying out Vim to see which one I like better.
One thing that I like about Emacs is the ability to run a terminal inside Emacs. Is this possible inside of Vim? I know that you can execute commands from Vim, but I would like to be able to run a terminal inside of a tab.
Outdated from August 2011
Check out Conque Shell (also on GitHub). Lets you run any interactive program inside vim, not just a shell.
I'm not sure exactly what you're trying to achieve (I've never used Emacs), but you can run commands in Vim by typing:
:! somecommand [ENTER]
And if you want to type in several commands, or play around in a shell for a while, you can always use:
:! bash (or your favourite shell) [ENTER]
Once the command or shell terminates, you'll be given the option to press Enter to return to your editor window
Vim is intentionally lightweight and lacking in the ability to do non-editorish type things, just as running a full-blown shell inside a Vim pane/tab, but as mentioned above there are third-party addons such as vim-shell that allow you to do that sort of thing.
Typically if I want to switch between Vim and my shell (Bash), I just hit CTRL+Z to pause the Vim process, play around in my shell, then type 'fg' when I want to go back to Vim - keeping my editor and my shell nice and separate.
Updated answer (11 years later...):
I would recommend using tmux instead of screen as suggested in the original answer below, if you choose to use that solution.
Vim 8.1 now has a built in terminal that can be opened with the :term command. This provides much more complete integration with the rest of the Vim features.
I would definitely recommend screen for something like this. Vim is a text editor, not a shell.
I would use Ctrl+AS to split the current window horizontally, or in Ubuntu's screen and other patched versions, you can use Ctrl+A|(pipe) to split vertically. Then use Ctrl+ATab (or equivalently on some systems, Ctrl+ACtrl+I which may be easier to type) to switch between the windows. There are other commands to change the size and arrangement of the windows.
Or a less advanced use of screen is just to open multiple full-screen windows and toggle between them. This is what I normally do, I only use the split screen feature occasionally.
The GNU Screen Survival Guide question has a number of good tips if you're unfamiliar with its use.
The way that I get around this is:
pause Vim with Ctrl + Z,
play in the terminal,
then return to exactly where you left with Vim by just typing the command fg.
If enabled in your version of Vim, a terminal can be started with the :term command.
Terminal window support was added to Vim 8. It is an optional feature that can be enabled when compiling Vim with the +terminal feature. If your version of Vim has terminal support, :echo has('terminal') will output "1".
Entering :term will place you in Terminal-Job mode, where you can use the terminal as expected.
Within Terminal-Job mode, pressing Ctrl-W N or Ctrl-\ Ctrl-N switches the mode to Terminal-Normal, which allows the cursor to be moved and commands to be ran similarly to Vim's Normal mode. To switch back to Terminal-Job mode, press i.
Other answers mention similar functionality in Neovim.
:sh then Ctrl+D to get back in (bash)
Update:
You could map Ctrl+D in vim to run :sh, which allows you to toggle between bash and vim quickly.
noremap <C-d> :sh<cr>
The main new feature of Vim 8.1 is support for running a terminal in a Vim window.
:term will open the terminal in another window inside Vim.
:term
Added in Vim 8.1.
Keep in mind that whenever a terminal window is active, most keystrokes will simply be passed to the terminal instead of having their usual functions. Ctrl-W and its subcommands are the main exception. To send a literal ^W input to the terminal, press Ctrl-W .. You can also open the Vim : command line by pressing Ctrl-W :. The other Ctrl-W commands work as normal, so managing windows works the same no matter what type of window is currently selected.
Eventually a native :terminal command was added to vim in 2017.
Here is an excerpt from the :terminal readme:
This feature is for running a terminal emulator in a Vim window. A
job can be started connected to the terminal emulator. For example, to
run a shell:
:term bash
Or to run build command:
:term make myprogram
The job runs asynchronously from Vim, the window will be updated to
show output from the job, also while editing in another window.
This question is rather old, but for those finding it, there's a new possible solution: Neovim contains a full-fledged, first-class terminal emulator, which does exactly what ConqueTerm tried to. Simply run :term <your command here>.
<C-\><C-n> will exit term mode back to normal-mode. If you're like me and prefer that escape still exit term mode, you can add this to your nvimrc:
tnoremap <ESC><ESC> <C-\><C-N>
And then hitting ESC twice will exit terminal mode back to normal-mode, so you can manipulate the buffer that the still-running command is writing to.
Though keep in mind, as nvim is under heavy development at the time I'm posting this answer, another way to exit terminal mode may be added. As Ctrl+\Ctrl+n switches to normal mode from almost any mode, I don't expect that this answer will become wrong, but be aware that if it doesn't work, this answer might be out of date.
https://github.com/neovim/neovim
I know that I'm not directly answering the question, but I think it's a
good approach. Nobody has mentioned tmux (or at least not as a
standalone answer). Tmux is a terminal multiplexor like screen. Most
stuff can be made in both multiplexors, but afaik tmux it's more easily
to configure. Also tmux right now is being more actively developed than
screen and there's quite a big ecosystem around it, like tools that help
the configuration, ecc.
Also for vim, there's another plugin: ViMUX, that helps a lot in
the interaction between both tools. You can call commands with:
:call VimuxRunCommand("ls")
That command creates a small horizontal split below the current pane vim
is in.
It can also let you run from a prompt in case you don't want to run the
whole command:
<Leader>vp :VimuxPromptCommand<CR>
As it weren't enought, there are at least 6 'platform specific plugins':
vim-vroom: runner for rspec, cucumber and test/unit; vimux support via g:vroom_use_vimux
vimux-ruby-test: a set of commands to easily run ruby tests
vimux-cucumber: run Cucumber Features through Vimux
vim-turbux: Turbo Ruby testing with tmux
vimux-pyutils: A set of functions for vimux that allow to run code blocks in ipython
vimux-nose-test: Run nose tests in vimux
Here is a nice "use case": Tests on demand using Vimux and Turbux with Spork and Guard
Someone already suggested https://github.com/Shougo/vimshell.vim, but they didn't mention why. Consequently, when I came away from this question I wasted a lot of other time trying the other (much higher ranked) options.
Shougo/vimshell is the answer. Here's why:
In addition to being a terminal emulator, VimShell allows you to navigate through terminal output in normal and visual mode. Thus, if a command you run results in output that you'd like to copy and paste using the keyboard only...VimShell covers this.
None of the other options mentioned, including the :terminal command in NeoVim do this. Neovim's :terminal comes close, but falls short in at least the following ways as of 2/18/2017:
Moves the cursor to the end of the buffer, instead of at the last keeping it in the same spot like VimShell does. Huge waste of time.
Doesn't support modifiable = 1 see a discussion on this at Github, so helpful plugins like vim-easymotion can't be used.
Doesn't support the display of line numbers like Vimshell does.
Don't waste time on the other options, including Neovim's :terminal. Go with VimShell.
It's possible to open a new tab with a terminal in vim since 2017 as #fjardon said:
Just type: :terminal. It will open a tab by default above your current tab.
If you want it to open in another place you can try the following options:
:below terminal : open the terminal below current tab.
:below vertical terminal : open the terminal always vertically to the right.
You can play with these until you find what you like. After this you can set a map in your .vimrc configuration file, for me, I use:
nmap <leader>tt :below vertical terminal<CR>
This way I can type <space>tt (space my leader key) to open it quickly.
As a side note:
You can switch between your tabs (terminal and other buffers) with Ctrl+W Ctrl+W.
You can enter an editable mode in your terminal if you want to copy your commands with Ctrl+W N and go to normal terminal mode with i or a.
Cheers!
You might want to take a look at the :sh command (see :help sh in Vim).
Various commands
No, you cannot:
http://vimdoc.sourceforge.net/htmldoc/tips.html#shell-window
By far, I have tried a lot of solutions mentioned here, what I really wanted is to keep the terminal open while coding a similar experience in VsCode. Then I came across this solution which is working perfectly for me.
Before Installing:
I am using Nvim 0.5 but I think it can work for any version and checked also on vim
I am using macOS Catalina Version 10.15.7
Setup your integrated terminal
Step -1-
Create a script with the name myQuickTerminal.vim or whatever name you want.
Put the following script
"==============================================================================
"
" ▒█▀▀█ █░░█ ░▀░ █▀▀ █░█   ▀▀█▀▀ █▀▀ █▀▀█ █▀▄▀█ ░▀░ █▀▀▄ █▀▀█ █░░
" ▒█░▒█ █░░█ ▀█▀ █░░ █▀▄   ░▒█░░ █▀▀ █▄▄▀ █░▀░█ ▀█▀ █░░█ █▄▄█ █░░
" ░▀▀█▄ ░▀▀▀ ▀▀▀ ▀▀▀ ▀░▀   ░▒█░░ ▀▀▀ ▀░▀▀ ▀░░░▀ ▀▀▀ ▀░░▀ ▀░░▀ ▀▀▀
"
"==============================================================================
" " This is a script that will trigger a terminal quickly than the FloatTerminal
" open new split panes to right and below
"link: https://betterprogramming.pub/setting-up-neovim-for-web-development-in-2020-d800de3efacd
"==============================================================================
set splitright
set splitbelow
" turn terminal to normal mode with escape
tnoremap <Esc> <C-\><C-n>
" start terminal in insert mode
au BufEnter * if &buftype == 'terminal' | :startinsert | endif
" open terminal on ctrl+n
function! OpenTerminal()
split term://zsh
resize 10
endfunction
nnoremap <leader> n :call OpenTerminal()<CR>
NOTE: if you want to run bash instead of zsh for a particular reason then replace zsh with bash.
Step -2-
Lets source it, put this in init.vim for neovim or `.vimrc' for vim
source $HOME/.config/nvim/modules/mySpecialScripts/myQuickTerminal.vim
This will be preloaded ahead as you save and resource it, you can use source $MYVIMRC for quick reloading the init.vim file.
Step -3-
I mapped as you can see in the script n to open a terminal in a new pane, my is the (Space bar) and once I click (space + n) a terminal will be triggered and I will enjoy writing my code while the terminal is opened.
To quit insert mode in the terminal, press Esc.
Now, to switch to the code editor pane, use CTRL+w w. This shortcut can get annoying once you have more than two panels open, so I added the following shortcuts too.
I mapped these too for quick jumping among opened panes, use these
" Better window navigation
nnoremap <C-h> <C-w>h
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-l> <C-w>l
Optional
If you want your terminal to exit the current buffer with key. you can use
tnoremap <Esc> <C-\><C-n>:q!<CR>
But since I want to switch in between several buffers I use without close the terminal I use instead:
tnoremap <Leader><Esc> <C-\><C-n>:q!<CR>
Final results
Reference:
https://betterprogramming.pub/setting-up-neovim-for-web-development-in-2020-d800de3efacd
Only way I know of is by using vim-shell, a third-party patch.
I use this now, you may can try. VimShell
Split the screen and run command term ++curwin to run the terminal inside the Vim buffer. Following command does both and worked for me:
:bo 10sp | term ++curwin
If you are interested in quick answer, here is it: :vert term. It will split your screen vertically and open up terminal.
Try vterm, which is a pretty much full feature shell inside vim. It is slightly buggy with its history and clear functions, and still in development, but it still is pretty good
Assuming your version of vim supports +term command first, set shell for vim to use in one command (e.g. set=/usr/bin/zsh), and then run the command +term (i.e. bo 15vs +term). you may have to do some additional maneuvering of your windows (i.e. deleting one and rotating), but you'll have your terminal.
With vim 8.1.3741, just type :terminal to start a terminal inside of vim.
Try map :nnoremap ]t :terminal<CR> to do that quicker!
I acknowledge that I am not strictly answering your question, but what has worked better for me when using Vim and Terminals in the same window is Tmux (which is kind of a "run in the background software" like, similar to screen, although this one works better with splits and tabs).
This post will help you to understand how they work together: 'Tmux and Vim — even better together'.
This way we can convert Vim into a powerful IDE

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