feat(buff): add bufferline utils module

lua/config/utils/bufferline.lua

@@ -0,0 +1,95 @@
+local Utils = {}
+
+function Utils.is_ft(b, ft)
+	return vim.bo[b].filetype == ft
+end
+
+function Utils.custom_filter(buf, buf_nums)
+	local logs = vim.tbl_filter(function(b)
+		return Utils.is_ft(b, "log")
+	end, buf_nums or {})
+	if vim.tbl_isempty(logs) then
+		return true
+	end
+	local tab_num = vim.fn.tabpagenr()
+	local last_tab = vim.fn.tabpagenr "$"
+	local is_log = Utils.is_ft(buf, "log")
+	if last_tab == 1 then
+		return true
+	end
+	-- only show log buffers in secondary tabs
+	return (tab_num == last_tab and is_log) or (tab_num ~= last_tab and not is_log)
+end
+
+function Utils.buf_kill(kill_command, bufnr, force)
+	local bo = vim.bo
+	local api = vim.api
+	local fmt = string.format
+	local fn = vim.fn
+
+	if bufnr == 0 or bufnr == nil then
+		bufnr = api.nvim_get_current_buf()
+	end
+
+	local bufname = api.nvim_buf_get_name(bufnr)
+
+	if not force then
+		local choice
+		if bo[bufnr].modified then
+			choice = fn.confirm(fmt([[Save changes to "%s"?]], bufname), "&Yes\n&No\n&Cancel")
+			if choice == 1 then
+				vim.api.nvim_buf_call(bufnr, function()
+					vim.cmd("w")
+				end)
+			elseif choice == 2 then
+				force = true
+			else
+				return
+			end
+		elseif api.nvim_get_option_value("buftype", { buf = 0 }) == "terminal" then
+			choice = fn.confirm(fmt([[Close "%s"?]], bufname), "&Yes\n&No\n&Cancel")
+			if choice == 1 then
+				force = true
+			else
+				return
+			end
+		end
+	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 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 and #windows > 0 then
+		for i, v in ipairs(buffers) do
+			if v == bufnr then
+				local prev_buf_idx = i == 1 and #buffers 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 Utils