Windows and buffers management

For this hydras you need next plugins:

• barbar.nvim
• BufExplorer
• WinShift.nvim
• smart-splits.nvim
• anuvyklack/windows.nvim

local Hydra = require('hydra')
local splits = require('smart-splits')

local cmd = require('hydra.keymap-util').cmd
local pcmd = require('hydra.keymap-util').pcmd

local buffer_hydra = Hydra({
   name = 'Barbar',
   config = {
      on_key = function()
         -- Preserve animation
         vim.wait(200, function() vim.cmd 'redraw' end, 30, false)
      end
   },
   heads = {
      { 'h', function() vim.cmd('BufferPrevious') end, { on_key = false } },
      { 'l', function() vim.cmd('BufferNext') end, { desc = 'choose', on_key = false } },

      { 'H', function() vim.cmd('BufferMovePrevious') end },
      { 'L', function() vim.cmd('BufferMoveNext') end, { desc = 'move' } },

      { 'p', function() vim.cmd('BufferPin') end, { desc = 'pin' } },

      { 'd', function() vim.cmd('BufferClose') end, { desc = 'close' } },
      { 'c', function() vim.cmd('BufferClose') end, { desc = false } },
      { 'q', function() vim.cmd('BufferClose') end, { desc = false } },

      { 'od', function() vim.cmd('BufferOrderByDirectory') end, { desc = 'by directory' } },
      { 'ol', function() vim.cmd('BufferOrderByLanguage') end,  { desc = 'by language' } },
      { '<Esc>', nil, { exit = true } }
   }
})

local function choose_buffer()
   if #vim.fn.getbufinfo({ buflisted = true }) > 1 then
      buffer_hydra:activate()
   end
end

vim.keymap.set('n', 'gb', choose_buffer)

local window_hint = [[
 ^^^^^^^^^^^^     Move      ^^    Size   ^^   ^^     Split
 ^^^^^^^^^^^^-------------  ^^-----------^^   ^^---------------
 ^ ^ _k_ ^ ^  ^ ^ _K_ ^ ^   ^   _<C-k>_   ^   _s_: horizontally 
 _h_ ^ ^ _l_  _H_ ^ ^ _L_   _<C-h>_ _<C-l>_   _v_: vertically
 ^ ^ _j_ ^ ^  ^ ^ _J_ ^ ^   ^   _<C-j>_   ^   _q_, _c_: close
 focus^^^^^^  window^^^^^^  ^_=_: equalize^   _z_: maximize
 ^ ^ ^ ^ ^ ^  ^ ^ ^ ^ ^ ^   ^^ ^          ^   _o_: remain only
 _b_: choose buffer
]]

Hydra({
   name = 'Windows',
   hint = window_hint,
   config = {
      invoke_on_body = true,
      hint = {
         border = 'rounded',
         offset = -1
      }
   },
   mode = 'n',
   body = '<C-w>',
   heads = {
      { 'h', '<C-w>h' },
      { 'j', '<C-w>j' },
      { 'k', pcmd('wincmd k', 'E11', 'close') },
      { 'l', '<C-w>l' },

      { 'H', cmd 'WinShift left' },
      { 'J', cmd 'WinShift down' },
      { 'K', cmd 'WinShift up' },
      { 'L', cmd 'WinShift right' },

      { '<C-h>', function() splits.resize_left(2)  end },
      { '<C-j>', function() splits.resize_down(2)  end },
      { '<C-k>', function() splits.resize_up(2)    end },
      { '<C-l>', function() splits.resize_right(2) end },
      { '=', '<C-w>=', { desc = 'equalize'} },

      { 's',     pcmd('split', 'E36') },
      { '<C-s>', pcmd('split', 'E36'), { desc = false } },
      { 'v',     pcmd('vsplit', 'E36') },
      { '<C-v>', pcmd('vsplit', 'E36'), { desc = false } },

      { 'w',     '<C-w>w', { exit = true, desc = false } },
      { '<C-w>', '<C-w>w', { exit = true, desc = false } },

      { 'z',     cmd 'WindowsMaximaze', { exit = true, desc = 'maximize' } },
      { '<C-z>', cmd 'WindowsMaximaze', { exit = true, desc = false } },

      { 'o',     '<C-w>o', { exit = true, desc = 'remain only' } },
      { '<C-o>', '<C-w>o', { exit = true, desc = false } },

      { 'b', choose_buffer, { exit = true, desc = 'choose buffer' } },

      { 'c',     pcmd('close', 'E444') },
      { 'q',     pcmd('close', 'E444'), { desc = 'close window' } },
      { '<C-c>', pcmd('close', 'E444'), { desc = false } },
      { '<C-q>', pcmd('close', 'E444'), { desc = false } },

      { '<Esc>', nil,  { exit = true, desc = false }}
   }
})