feat: add a minimal implementation of bbye (#2267)

1 files changed, 62 insertions, 0 deletions

diff --git a/lua/lvim/core/bufferline.lua b/lua/lvim/core/bufferline.lua
index 06de3ac4..c7b5fd2d 100644
--- a/lua/lvim/core/bufferline.lua
+++ b/lua/lvim/core/bufferline.lua
@@ -139,4 +139,66 @@ M.setup = function()
   end
 end
 
+-- Common kill function for bdelete and bwipeout
+-- credits: based on bbye and nvim-bufdel
+---@param kill_command String defaults to "bd"
+---@param bufnr Number defaults to the current buffer
+---@param force Boolean defaults to false
+function M.buf_kill(kill_command, bufnr, force)
+  local bo = vim.bo
+  local api = vim.api
+
+  if bufnr == 0 or bufnr == nil then
+    bufnr = api.nvim_get_current_buf()
+  end
+
+  kill_command = kill_command or "bd"
+
+  -- If buffer is modified and force isn't true, print error and abort
+  if not force and bo[bufnr].modified then
+    return api.nvim_err_writeln(
+      string.format("No write since last change for buffer %d (set force to true to override)", bufnr)
+    )
+  end
+
+  -- Get list of windows IDs with the buffer to close
+  local windows = vim.tbl_filter(function(win)
+    return api.nvim_win_get_buf(win) == bufnr
+  end, api.nvim_list_wins())
+
+  if #windows == 0 then
+    return
+  end
+
+  if force then
+    kill_command = kill_command .. "!"
+  end
+
+  -- Get list of active buffers
+  local buffers = vim.tbl_filter(function(buf)
+    return api.nvim_buf_is_valid(buf) and bo[buf].buflisted
+  end, api.nvim_list_bufs())
+
+  -- If there is only one buffer (which has to be the current one), vim will
+  -- create a new buffer on :bd.
+  -- For more than one buffer, pick the previous buffer (wrapping around if necessary)
+  if #buffers > 1 then
+    for i, v in ipairs(buffers) do
+      if v == bufnr then
+        local prev_buf_idx = i == 1 and (#buffers - 1) or (i - 1)
+        local prev_buffer = buffers[prev_buf_idx]
+        for _, win in ipairs(windows) do
+          api.nvim_win_set_buf(win, prev_buffer)
+        end
+      end
+    end
+  end
+
+  -- Check if buffer still exists, to ensure the target buffer wasn't killed
+  -- due to options like bufhidden=wipe.
+  if api.nvim_buf_is_valid(bufnr) and bo[bufnr].buflisted then
+    vim.cmd(string.format("%s %d", kill_command, bufnr))
+  end
+end
+
 return M