feat(preview): custom title (#1563)

Co-authored-by: pynappo <lehtien.david@gmail.com>

README.md

@@ -729,7 +729,14 @@ an existing split by configuring the command like this:
 require("neo-tree").setup({
   window = {
     mappings = {
-      ["P"] = { "toggle_preview", config = { use_float = false, use_image_nvim = true } },
+      ["P"] = {
+        "toggle_preview",
+        config = {
+          use_float = false,
+          -- use_image_nvim = true,
+          -- title = 'Neo-tree Preview',
+        },
+      },
     }
   }
 })
@@ -739,6 +746,8 @@ Anything that causes Neo-tree to lose focus will end preview mode. When
 `use_float = false`, the window that was taken over by preview mode will revert
 back to whatever was shown in that window before preview mode began.
 
+You can choose a custom title for the floating window by setting the `title` option in its config.
+
 If you want to work with the floating preview mode window in autocmds or other
 custom code, the window will have the `neo-tree-preview` filetype.
 

lua/neo-tree/defaults.lua

@@ -392,7 +392,11 @@ local config = {
       ["<cr>"] = "open",
       -- ["<cr>"] = { "open", config = { expand_nested_files = true } }, -- expand nested file takes precedence
       ["<esc>"] = "cancel", -- close preview or floating neo-tree window
-      ["P"] = { "toggle_preview", config = { use_float = true, use_image_nvim = false } },
+      ["P"] = { "toggle_preview", config = {
+        use_float = true,
+        use_image_nvim = false,
+        -- title = "Neo-tree Preview", -- You can define a custom title for the preview floating window.
+      } },
       ["<C-f>"] = { "scroll_preview", config = {direction = -10} },
       ["<C-b>"] = { "scroll_preview", config = {direction = 10} },
       ["l"] = "focus_preview",

lua/neo-tree/sources/common/preview.lua

@@ -12,6 +12,7 @@ local function create_floating_preview_window(state)
   local default_position = utils.resolve_config_option(state, "window.position", "left")
   state.current_position = state.current_position or default_position
 
+  local title = state.config.title or "Neo-tree Preview"
   local winwidth = vim.api.nvim_win_get_width(state.winid)
   local winheight = vim.api.nvim_win_get_height(state.winid)
   local height = vim.o.lines - 4
@@ -58,7 +59,7 @@ local function create_floating_preview_window(state)
   end
 
   local popups = require("neo-tree.ui.popups")
-  local options = popups.popup_options("Neo-tree Preview", width, {
+  local options = popups.popup_options(title, width, {
     ns_id = highlights.ns_id,
     size = { height = height, width = width },
     relative = "editor",
@@ -446,7 +447,6 @@ Preview.scroll = function(state)
       vim.cmd([[normal! ]] .. count .. input)
     end)
   end
-
 end
 
 return Preview