Neovim 0.9: Continued API and Feature Changes

add new behavior. • 'exrc' now supports `.nvim.lua` file. • 'exrc' is no longer marked deprecated. • The |TUI| is changed to run in a separate process (previously, a separate thread was used). This is not supposed to be a visible change to the user, but might be the cause of subtle changes of behavior and bugs. Previously, the TUI could be disabled as a build time feature (+tui/-tui), resulting in a nvim binary which only could be run headless or embedded in an external process. As of this version, TUI is always available. • Vim's `has('gui_running')` is now supported as a way for plugins to check if a GUI (not the |TUI|) is attached to Nvim. |has()| • |msgsep| is now always enabled even if 'display' doesn't contain the "msgsep" flag. It is no longer possible to scroll the whole screen when showing messages longer than 'cmdheight'. • API calls now show more information about where an exception happened. • The `win_viewport` UI event now contains information about virtual lines, meaning that smooth scrolling can now be implemented more consistently. • The `:= {expr}` syntax can be used to evaluate a Lua expression, as a shorter form of `:lua ={expr}`. `:=` and `:[range]=` without argument are unchanged. However `:=#` and similar variants using |ex-flags| are no longer supported. • Unsaved changes are now preserved rather than discarded when |channel-stdio| is closed. • |nvim_open_win()| now accepts a relative `mouse` option to open a floating win relative to the mouse. Note that the mouse doesn't update frequently without setting `vim.o.mousemoveevent = true` • |nvim_eval_statusline()| supports evaluating the 'statuscolumn' through a new `opts` field: `use_statuscol_lnum`. • |nvim_buf_get_extmarks()| now accepts a -1 `ns_id` to request extmarks from all namespaces and adds the namespace id to the details array. Other missing properties have been added to the details array and marks can be filtered by type. • |vim.diagnostic.open_float()| (and therefore |vim.diagnostic.config()|) now accepts a `suffix` option which, by default, renders LSP error codes. Similarly, the `virtual_text` configuration in |vim.diagnostic.config()| now has a `suffix` option which does nothing by default. • |vim.fs.dir()| now has a `opts` argument with a depth field to allow recursively searching a directory tree. • |vim.gsplit()| supports all features of |vim.split()|. • |:highlight| now supports an additional attribute "altfont". • |:Man| manpage viewer supports manpage names containing spaces. • |nvim_select_popupmenu_item()| now supports |cmdline-completion| popup menu. • |nvim_list_uis()| reports all |ui-option| fields. • |nvim_get_option_value()| now has a `filetype` option so it can return the default option for a specific filetype. • build: Several improvements were made to make the code generation scripts more deterministic, and a `LUA_GEN_PRG` build parameter has been introduced to allow for a workaround for some remaining reproducibility problems. ============================================================================== REMOVED FEATURES The following deprecated functions or APIs were removed. • `filetype.vim` is removed in favor of |vim.filetype| (Note that filetype logic and tests still align with Vim, so additions or changes need to be contributed there first.) See https://github.com/neovim/neovim/pull/20674. • 'hkmap', 'hkmapp' and 'aleph' options were removed. Use 'keymap' option instead. • |LanguageTree:parse()| no longer returns changed regions. Please use the `on_changedtree` callbacks instead. • `vim.highlight.create()`, `vim.highlight.link()` were removed, use |nvim_set_hl()| instead. • `require'health'` was removed. Use |vim.health| instead. ============================================================================== DEPRECATIONS See |deprecated-0.9|. vim:tw=78:ts=8:sw=2:et:ft=help:norl:

This section outlines changes and improvements to Neovim 0.9's APIs and features. Includes enhanced exrc support, TUI process separation, GUI attachment checks, message separation, detailed exception info, virtual line info in `win_viewport`, Lua expression evaluation syntax, and unsaved change preservation. New options for `nvim_open_win()`, `nvim_eval_statusline()`, and `nvim_buf_get_extmarks()` are detailed, alongside updates to diagnostic configurations, recursive directory searching, extended `vim.split()` features, highlighting attributes, manpage support, popup menu selection, and UI option reporting. Code generation improvements are noted. Deprecated functions and APIs are removed, see deprecated features list.