From 9f85b2508209de9df73a223768ee0162fb87c1d0 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Mon, 31 Jan 2022 22:02:08 +0900
Subject: neovim: add SmartTabEdit command

---
 .config/nvim/init.lua        | 28 +++++++++++++++++++++++++++-
 .config/nvim/plugin/leaf.vim | 16 ++++++++--------
 2 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/.config/nvim/init.lua b/.config/nvim/init.lua
index 52b814c..830310f 100644
--- a/.config/nvim/init.lua
+++ b/.config/nvim/init.lua
@@ -733,7 +733,7 @@ function vimrc.fn.open_scratch()
    if F.isdirectory(dir) == 0 then
       F.mkdir(dir, 'p')
    end
-   vim.cmd(('edit %s/%s.%s'):format(dir, fname, ext))
+   vim.cmd(('SmartTabEdit %s/%s.%s'):format(dir, fname, ext))
    if vim.bo.filetype ~= ft then
       vim.cmd('setlocal filetype=' .. ft)
    end
@@ -856,6 +856,32 @@ command! -bar -range=%
 
 
 
+function vimrc.fn.smart_tabedit(mods, args)
+   local is_empty_buffer = (
+      F.bufname() == ''
+      and not vim.bo.modified
+      and F.line('$') <= 1
+      and F.getline('.') == ''
+   )
+
+   if is_empty_buffer then
+      vim.cmd(mods .. ' edit ' .. args)
+   else
+      vim.cmd(mods .. ' tabedit ' .. args)
+   end
+end
+
+
+-- If the current buffer is empty, open a file with the current window;
+-- otherwise open a new tab.
+vim.cmd([[
+command! -bar -complete=file -nargs=*
+   \ SmartTabEdit
+   \ call v:lua.vimrc.fn.smart_tabedit(<q-mods>, <q-args>)
+]])
+
+
+
 -- Appearance {{{1
 
 -- Color scheme {{{2
diff --git a/.config/nvim/plugin/leaf.vim b/.config/nvim/plugin/leaf.vim
index e4826b3..5d0d580 100644
--- a/.config/nvim/plugin/leaf.vim
+++ b/.config/nvim/plugin/leaf.vim
@@ -9,15 +9,15 @@ nmap  <Space>  <Nop>
 nmap  <Space>l  (leaf)
 nnoremap  (leaf)  <Nop>
 
-nnoremap  (leaf)i  <Cmd>tabedit ~/leaves/INBOX.leaf<CR>
-nnoremap  (leaf)t  <Cmd>tabedit ~/leaves/TODO.leaf<CR>
-nnoremap  (leaf)c  <Cmd>tabedit ~/leaves/CALENDAR.leaf<CR>
-nnoremap  (leaf)p  <Cmd>tabedit ~/leaves/PROJECTS.leaf<CR>
-nnoremap  (leaf)s  <Cmd>tabedit ~/leaves/SOMEDAY.leaf<CR>
-nnoremap  (leaf)r  <Cmd>tabedit ~/leaves/REFS.leaf<CR>
-nnoremap  (leaf)A  <Cmd>tabedit ~/leaves/ARCHIVES.leaf<CR>
+nnoremap  (leaf)i  <Cmd>SmartTabEdit ~/leaves/INBOX.leaf<CR>
+nnoremap  (leaf)t  <Cmd>SmartTabEdit ~/leaves/TODO.leaf<CR>
+nnoremap  (leaf)c  <Cmd>SmartTabEdit ~/leaves/CALENDAR.leaf<CR>
+nnoremap  (leaf)p  <Cmd>SmartTabEdit ~/leaves/PROJECTS.leaf<CR>
+nnoremap  (leaf)s  <Cmd>SmartTabEdit ~/leaves/SOMEDAY.leaf<CR>
+nnoremap  (leaf)r  <Cmd>SmartTabEdit ~/leaves/REFS.leaf<CR>
+nnoremap  (leaf)A  <Cmd>SmartTabEdit ~/leaves/ARCHIVES.leaf<CR>
 
-nnoremap  (leaf)l  <Cmd>tabedit ~/leaves/INBOX.leaf <Bar>normal G<CR>
+nnoremap  (leaf)l  <Cmd>SmartTabEdit ~/leaves/INBOX.leaf <Bar>normal G<CR>
 
 
 let g:loaded_leaf = 1
-- 
cgit v1.2.3-70-g09d2