feat: config option to customize floating window title (#482)

* replace cwd path in actual path

* move get_title to utils

* add documentation

* rename

* add method doc

* add comment

* fallback to 0 for winid

* add missing property definition for relative_win_title

* only replace when at the start of the path

* simplify

* minor change

* add entry point to customize floating window title for oil-buffer

* remove config parameter

* cleanup

* add documentation

* move get_win_title to top and pass winid as parameter

* add get_win_title to type definition for oil.setup

* remove empty line

* adjust comment

---------

Co-authored-by: Philipp Oeschger <philippoeschger@Philipps-Air.fritz.box>

lua/oil/config.lua

@@ -127,6 +127,8 @@ local default_config = {
     win_options = {
       winblend = 0,
     },
+    -- optionally override the oil buffers window title with custom function: fun(winid: integer): string
+    get_win_title = nil,
     -- preview_split: Split direction: "auto", "left", "right", "above", "below".
     preview_split = "auto",
     -- This is the config that will be passed to nvim_open_win.
@@ -332,6 +334,7 @@ local M = {}
 ---@field max_height integer
 ---@field border string|string[]
 ---@field win_options table<string, any>
+---@field get_win_title fun(winid: integer): string
 ---@field preview_split "auto"|"left"|"right"|"above"|"below"
 ---@field override fun(conf: table): table
 
@@ -341,6 +344,7 @@ local M = {}
 ---@field max_height? integer
 ---@field border? string|string[] Window border
 ---@field win_options? table<string, any>
+---@field get_win_title? fun(winid: integer): string
 ---@field preview_split? "auto"|"left"|"right"|"above"|"below" Direction that the preview command will split the window
 ---@field override? fun(conf: table): table
 

lua/oil/init.lua

@@ -288,19 +288,6 @@ M.open_float = function(dir)
     })
   )
 
-  ---Recalculate the window title for the current buffer
-  local function get_title()
-    local src_buf = vim.api.nvim_win_get_buf(winid)
-    local title = vim.api.nvim_buf_get_name(src_buf)
-    local scheme, path = util.parse_url(title)
-    if config.adapters[scheme] == "files" then
-      assert(path)
-      local fs = require("oil.fs")
-      title = vim.fn.fnamemodify(fs.posix_to_os_path(path), ":~")
-    end
-    return title
-  end
-
   table.insert(
     autocmds,
     vim.api.nvim_create_autocmd("BufWinEnter", {
@@ -324,7 +311,7 @@ M.open_float = function(dir)
             col = cur_win_opts.col,
             width = cur_win_opts.width,
             height = cur_win_opts.height,
-            title = get_title(),
+            title = util.get_title(winid),
           })
         end
       end,

lua/oil/util.lua

@@ -360,6 +360,26 @@ M.is_floating_win = function(winid)
   return vim.api.nvim_win_get_config(winid or 0).relative ~= ""
 end
 
+---Recalculate the window title for the current buffer
+---@param winid nil|integer
+---@return string
+M.get_title = function(winid)
+  if config.float.get_win_title ~= nil then
+    return config.float.get_win_title(winid or 0)
+  end
+
+  local src_buf = vim.api.nvim_win_get_buf(winid or 0)
+  local title = vim.api.nvim_buf_get_name(src_buf)
+  local scheme, path = M.parse_url(title)
+
+  if config.adapters[scheme] == "files" then
+    assert(path)
+    local fs = require("oil.fs")
+    title = vim.fn.fnamemodify(fs.posix_to_os_path(path), ":~")
+  end
+  return title
+end
+
 local winid_map = {}
 M.add_title_to_win = function(winid, opts)
   opts = opts or {}
@@ -367,21 +387,10 @@ M.add_title_to_win = function(winid, opts)
   if not vim.api.nvim_win_is_valid(winid) then
     return
   end
-  local function get_title()
-    local src_buf = vim.api.nvim_win_get_buf(winid)
-    local title = vim.api.nvim_buf_get_name(src_buf)
-    local scheme, path = M.parse_url(title)
-    if config.adapters[scheme] == "files" then
-      assert(path)
-      local fs = require("oil.fs")
-      title = vim.fn.fnamemodify(fs.posix_to_os_path(path), ":~")
-    end
-    return title
-  end
   -- HACK to force the parent window to position itself
   -- See https://github.com/neovim/neovim/issues/13403
   vim.cmd.redraw()
-  local title = get_title()
+  local title = M.get_title(winid)
   local width = math.min(vim.api.nvim_win_get_width(winid) - 4, 2 + vim.api.nvim_strwidth(title))
   local title_winid = winid_map[winid]
   local bufnr
@@ -429,7 +438,7 @@ M.add_title_to_win = function(winid, opts)
         if vim.api.nvim_win_get_buf(winid) ~= winbuf then
           return
         end
-        local new_title = get_title()
+        local new_title = M.get_title(winid)
         local new_width =
           math.min(vim.api.nvim_win_get_width(winid) - 4, 2 + vim.api.nvim_strwidth(new_title))
         vim.api.nvim_buf_set_lines(bufnr, 0, -1, true, { " " .. new_title .. " " })