add preview

README.md

@@ -47,12 +47,8 @@ let g:lua_tree_bindings = {
     \ 'edit_vsplit': '<C-v>',
     \ 'edit_split':  '<C-x>',
     \ 'edit_tab':    '<C-t>',
-    \ 'cd':          '.',
+    \ 'preview':     '<Tab>',
-    \ 'create':      'a',
+    \ 'cd':          '<C-]>',
-    \ 'remove':      'd',
-    \ 'rename':      'r'
-    \ }
-
 " default will show icon by default if no icon is provided
 " default shows no icon by default
 let g:lua_tree_icons = {
@@ -85,19 +81,20 @@ highlight LuaTreeFolderIcon guibg=blue
 
 - move around like in any vim buffer
 - `<CR>` on `..` will cd in the above directory
-- `.` will cd in the directory under the cursor
+- `<C-]>` will cd in the directory under the cursor
 - type `a` to add a file. Adding a directory requires leaving a leading `/` at the end of the path.
 > you can add multiple directories by doing foo/bar/baz/f and it will add foo bar and baz directories and f as a file
 - type `r` to rename a file
 - type `d` to delete a file (will prompt for confirmation)
 - if the file is a directory, `<CR>` will open the directory otherwise it will open the file in the buffer near the tree
 - if the file is a symlink, `<CR>` will follow the symlink (if the target is a file)
-- type `<C-v>` will open the file in a vertical split
+- `<C-v>` will open the file in a vertical split
-- type `<C-x>` will open the file in a horizontal split
+- `<C-x>` will open the file in a horizontal split
-- type `<C-t>` will open the file in a new tab
+- `<C-t>` will open the file in a new tab
-- type `gx` to open the file with the `open` command on MACOS and `xdg-open` in linux
+- `<Tab>` will open the file as a preview (keeps the cursor in the tree)
+- `gx` opens the file with the `open` command on MACOS and `xdg-open` in linux
 - Double left click acts like `<CR>`
-- Double right click acts like `.`
+- Double right click acts like `<C-]>`
 
 ## Note
 

doc/nvim-tree-lua.txt

@@ -122,7 +122,7 @@ INFORMATIONS				        *nvim-tree-info*
 
 - move around like in any vim buffer
 - '<CR>' on '..' will cd in the above directory
-- typing '.' will cd in the directory under the cursor
+- typing '<C-]>' will cd in the directory under the cursor
 
 - type 'a' to add a file
 - type 'r' to rename a file
@@ -131,14 +131,15 @@ INFORMATIONS				        *nvim-tree-info*
 - if the file is a directory, '<CR>' will open the directory
 - otherwise it will open the file in the buffer near the tree
 - if the file is a symlink, '<CR>' will follow the symlink
-- type '<C-v>' will open the file in a vertical split
+- '<C-v>' will open the file in a vertical split
-- type '<C-x>' will open the file in a horizontal split
+- '<C-x>' will open the file in a horizontal split
-- type '<C-t>' will open the file in a new tab
+- '<C-t>' will open the file in a new tab
-- type 'gx' to open the file with the `open` command on macos and `xdg-open`
+- '<Tab>' will open the file as a preview (keeps the cursor in the tree)
+- 'gx' opens the file with the `open` command on macos and `xdg-open`
 on linux.
 
 - Double left click acts like '<CR>'
-- Double right click acts like '.'
+- Double right click acts like '<C-]>'
 
 |g:lua_tree_bindings|                             *g:lua_tree_bindings*
 
@@ -150,7 +151,8 @@ default keybindings will be applied to undefined keys.
         \ edit_vsplit: '<c-v>',
         \ edit_split:  '<c-x>',
         \ edit_tab:    '<c-t>',
-        \ cd:          '.',
+        \ cd:          '<c-]>',
+	\ preview:     '<Tab>',
         \ create:      'a',
         \ remove:      'd',
         \ rename:      'r'

lua/lib/config.lua

@@ -49,6 +49,7 @@ function M.get_bindings()
     edit_vsplit = keybindings.edit_vsplit or '<C-v>',
     edit_split  = keybindings.edit_split or '<C-x>',
     edit_tab    = keybindings.edit_tab or '<C-t>',
+    preview     = keybindings.preview or '<Tab>',
     cd          = keybindings.cd or '<C-]>',
     create      = keybindings.create or 'a',
     remove      = keybindings.remove or 'd',

lua/lib/tree.lua

@@ -183,7 +183,16 @@ function M.open_file(mode, filename)
   else
     api.nvim_command('noautocmd wincmd l')
   end
-  api.nvim_command(string.format("%s %s", mode, filename))
+  if mode == 'preview' then
+    api.nvim_command(string.format("edit %s", filename))
+    if vim.g.lua_tree_side == 'right' then
+      api.nvim_command('noautocmd wincmd l')
+    else
+      api.nvim_command('noautocmd wincmd h')
+    end
+  else
+    api.nvim_command(string.format("%s %s", mode, filename))
+  end
 end
 
 function M.change_dir(foldername)
@@ -207,6 +216,7 @@ local function set_mappings()
     [bindings.create] = 'on_keypress("create")';
     [bindings.remove] = 'on_keypress("remove")';
     [bindings.rename] = 'on_keypress("rename")';
+    [bindings.preview] = 'on_keypress("preview")';
     gx = "xdg_open()";
   }
 

lua/tree.lua

@@ -39,6 +39,11 @@ function M.on_keypress(mode)
     return fs.rename(node)
   end
 
+  if mode == 'preview' then
+    if node.entries ~= nil or node.name == '..' then return end
+    return tree.open_file(mode, node.absolute_path)
+  end
+
   if node.name == ".." then
     return tree.change_dir("..")
   elseif mode == "cd" and node.entries ~= nil then
@@ -49,6 +54,7 @@ function M.on_keypress(mode)
 
   if node.link_to then
     local stat = luv.fs_stat(node.link_to)
+    -- TODO: potentially CD here
     if stat.type == 'directory' then return end
     tree.open_file(mode, node.link_to)
   elseif node.entries ~= nil then