Greatly improve terminal features! Persistent terminals (#275)

* remove toggleTerm plugin

* Adding term binds, term hider & Telescope terms to bring them back

* Adding many term features!

lua/utils.lua

@@ -34,6 +34,119 @@ M.clear_cmdline = function()
    end, 0)
 end
 
+M.close_buffer = function(bufexpr, force)
+   -- This is a modification of a NeoVim plugin from
+   -- Author: ojroques - Olivier Roques 
+   -- Src: https://github.com/ojroques/nvim-bufdel
+   -- (Author has okayed copy-paste)
+
+   -- Options
+   local opts = {
+      next = 'cycle',  -- how to retrieve the next buffer
+      quit = false,     -- exit when last buffer is deleted
+      --TODO make this a chadrc flag/option
+   }
+
+   -- ----------------
+   -- Helper functions
+   -- ----------------
+   
+   -- Switch to buffer 'buf' on each window from list 'windows'
+   local function switch_buffer(windows, buf)
+      local cur_win = vim.fn.winnr()
+      for _, winid in ipairs(windows) do
+         vim.cmd(string.format('%d wincmd w', vim.fn.win_id2win(winid)))
+         vim.cmd(string.format('buffer %d', buf))
+      end
+      vim.cmd(string.format('%d wincmd w', cur_win))  -- return to original window
+   end
+   
+   -- Select the first buffer with a number greater than given buffer
+   local function get_next_buf(buf)
+      local next = vim.fn.bufnr('#')
+      if opts.next == 'alternate' and vim.fn.buflisted(next) == 1 then
+         return next
+      end
+      for i = 0, vim.fn.bufnr('$') - 1 do
+         next = (buf + i) % vim.fn.bufnr('$') + 1  -- will loop back to 1
+         if vim.fn.buflisted(next) == 1 then
+            return next
+         end
+      end
+   end
+
+   -- ----------------
+   -- End helper functions
+   -- ----------------
+   
+   local buf = vim.fn.bufnr()
+   if vim.fn.buflisted(buf) == 0 then  -- exit if buffer number is invalid
+      return
+   end
+   
+   if #vim.fn.getbufinfo({buflisted = 1}) < 2 then
+      if opts.quit then
+         -- exit when there is only one buffer left
+         if force then
+            vim.cmd('qall!')
+         else
+            vim.cmd('confirm qall')
+         end
+         return
+      end
+      
+      local chad_term, type = pcall(function()
+         return vim.api.nvim_buf_get_var(buf, "term_type")
+         end)
+         
+      if chad_term then
+         -- Must be a window type
+         vim.cmd(string.format('setlocal nobl', buf))
+         vim.cmd('enew')
+         return
+      end
+      -- don't exit and create a new empty buffer
+      vim.cmd('enew')
+      vim.cmd('bp')
+   end
+   
+   local next_buf = get_next_buf(buf)
+   local windows = vim.fn.getbufinfo(buf)[1].windows
+   
+   -- force deletion of terminal buffers to avoid the prompt
+   if force or vim.fn.getbufvar(buf, '&buftype') == 'terminal' then
+      local chad_term, type = pcall(function()
+         return vim.api.nvim_buf_get_var(buf, "term_type")
+         end)
+         
+      -- TODO this scope is error prone, make resilient
+      if chad_term then
+         if type == "wind" then
+            -- hide from bufferline
+            vim.cmd(string.format('%d bufdo setlocal nobl', buf))
+            -- swtich to another buff
+            -- TODO switch to next bufffer, this works too
+            vim.cmd('BufferLineCycleNext')
+         else
+            local cur_win = vim.fn.winnr()
+            -- we can close this window
+            vim.cmd(string.format('%d wincmd c', cur_win))
+            return
+         end
+      else
+         switch_buffer(windows, next_buf)
+         vim.cmd(string.format('bd! %d', buf))
+      end
+   else
+      switch_buffer(windows, next_buf)
+      vim.cmd(string.format('silent! confirm bd %d', buf))
+   end
+   -- revert buffer switches if user has canceled deletion
+   if vim.fn.buflisted(buf) == 1 then
+      switch_buffer(windows, buf)
+   end
+end
+
 -- 1st arg - r or w
 -- 2nd arg - file path
 -- 3rd arg - content if 1st arg is w