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Problem: In Virtual Replace mode, backspacing over a character that
replaced several multi-byte characters deletes the padding
that follows it, so the text after the cursor loses its
alignment.
Solution: In replace_do_bs() advance by the length of the character at
the current offset instead of always measuring the first
restored character (Volodymyr Chernetskyi).
After the original characters are restored, replace_do_bs() adds up
their screen width so it knows how much of the alignment padding to drop
again. The loop advanced "i" by mb_ptr2len(p) - 1, which always returns
the length of the *first* restored character rather than the length of
the character at the offset being looked at.
One backspace can restore more than one character, because a wide
character may have replaced several narrow ones. When those characters
do not all have the same byte length the index lands in the middle of a
character: chartabsize() then measures a trailing byte, counts it as an
unprintable <xx> worth four cells, and the inflated width makes the
following loop delete padding spaces that should have been kept.
call setline(1, 'aé xyz')
call feedkeys("gR\u4e00\<BS>\e", 'xt')
leaves "aéxyz" instead of restoring the original line. Going the other
way round ('éa') happens to work, since there the first character is the
longer one.
This has been wrong since the loop was added in Vim 7.0.
closes: vim/vim#21211
5d934b1bdb
Co-authored-by: Volodymyr Chernetskyi <19735328+chernetskyi@users.noreply.github.com>
Neovim is a project that seeks to aggressively refactor Vim in order to:
- Simplify maintenance and encourage contributions
- Split the work between multiple developers
- Enable advanced UIs without modifications to the core
- Maximize extensibility
See the Introduction wiki page and Roadmap for more information.
Features
- Modern GUIs
- API access from any language including C/C++, C#, Clojure, D, Elixir, Go, Haskell, Java/Kotlin, JavaScript/Node.js, Julia, Lisp, Lua, Perl, Python, Racket, Ruby, Rust
- Embedded, scriptable terminal emulator
- Asynchronous job control
- Shared data (shada) among multiple editor instances
- XDG base directories support
- Compatible with most Vim plugins, including Ruby and Python plugins
See :help nvim-features for the full list, and :help news for noteworthy changes in the latest version!
Install from package
Pre-built packages for Windows, macOS, and Linux are found on the Releases page.
Managed packages are in Homebrew, Debian, Ubuntu, Fedora, Arch Linux, Void Linux, Gentoo, and more!
Install from source
See BUILD.md and supported platforms for details.
The build is CMake-based, but a Makefile is provided as a convenience. After installing the dependencies, run the following command.
make CMAKE_BUILD_TYPE=RelWithDebInfo
sudo make install
To install to a non-default location:
make CMAKE_BUILD_TYPE=RelWithDebInfo CMAKE_INSTALL_PREFIX=/full/path/
make install
CMake hints for inspecting the build:
cmake --build build --target helplists all build targets.build/CMakeCache.txt(orcmake -LAH build/) contains the resolved values of all CMake variables.build/compile_commands.jsonshows the full compiler invocations for each translation unit.
Transitioning from Vim
See :help nvim-from-vim for instructions.
Project layout
├─ cmake/ CMake utils
├─ cmake.config/ CMake defines
├─ cmake.deps/ subproject to fetch and build dependencies (optional)
├─ runtime/ plugins and docs
├─ src/nvim/ application source code (see src/nvim/README.md)
│ ├─ api/ API subsystem
│ ├─ eval/ Vimscript subsystem
│ ├─ event/ event-loop subsystem
│ ├─ generators/ code generation (pre-compilation)
│ ├─ lib/ generic data structures
│ ├─ lua/ Lua subsystem
│ ├─ msgpack_rpc/ RPC subsystem
│ ├─ os/ low-level platform code
│ └─ tui/ built-in UI
└─ test/ tests (see test/README.md)
License
Neovim contributions since b17d96 are licensed under the
Apache 2.0 license, except for contributions copied from Vim (identified by the
vim-patch token). See LICENSE.txt for details.