DogLooksGood / Parinfer Mode

#+TITLE: Parinfer Mode #+AUTHOR: DogLooksGood

[[https://melpa.org/#/parinfer][file:https://melpa.org/packages/parinfer-badge.svg]] [[https://stable.melpa.org/#/parinfer][file:https://stable.melpa.org/packages/parinfer-badge.svg]]

[[file:images/logo.png]]

• Deprecated

This project is no longer maintained.I have no success for a fast enough implementation in Emacs Lisp.

Fortunately, there's a [[https://github.com/justinbarclay/parinfer-rust-mode][parinfer-rust-mode]]!

• Demo [[file:images/demo.gif]]

• Table of contents

• [[#what-is-parinfer][What Is Parinfer]]
• [[#installation][Installation]]
• [[#indent-and-paren-modes][Indent And Paren Modes]]
• [[#configurations][Configurations]]
• [[#credits][Credits]]
• [[#license][License]]
• [[#contribution][Contribution]]

• What Is Parinfer Parinfer is a proof-of-concept editor mode for Lisp programming languages. It will infer some changes to keep Parens and Indentation inline with one another. Parinfer consists of two modes:

• Indent Mode :: Indent Mode gives you full control of indentation, while Parinfer corrects parens.
• Paren Mode :: Paren Mode gives you full control of parens, while Parinfer corrects indentation.

To learn more about Parinfer, please take a look at its [[https://shaunlebron.github.io/parinfer/][home page]].

And the parinfer-mode is the implementation on Emacs with [[https://github.com/oakmac/parinfer-elisp][parinfer-elisp]].

• Installation Parinfer is available on MELPA(and MELPA Stable) now, I recommend to install with [[https://github.com/jwiegley/use-package][use-package]].

Add following code to your .emacs or init.el.

#+BEGIN_SRC elisp (use-package parinfer :ensure t :bind (("C-," . parinfer-toggle-mode)) :init (progn (setq parinfer-extensions '(defaults ; should be included. pretty-parens ; different paren styles for different modes. evil ; If you use Evil. lispy ; If you use Lispy. With this extension, you should install Lispy and do not enable lispy-mode directly. paredit ; Introduce some paredit commands. smart-tab ; C-b & C-f jump positions and smart shift with tab & S-tab. smart-yank)) ; Yank behavior depend on mode. (add-hook 'clojure-mode-hook #'parinfer-mode) (add-hook 'emacs-lisp-mode-hook #'parinfer-mode) (add-hook 'common-lisp-mode-hook #'parinfer-mode) (add-hook 'scheme-mode-hook #'parinfer-mode) (add-hook 'lisp-mode-hook #'parinfer-mode))) #+END_SRC

• Indent And Paren Modes Toggle Indent Mode and Paren Mode with command parinfer-toggle-mode.

** Avoid unexpect buffer changes. Whenever you switch to Indent Mode, parinfer-mode will correct all parens of current buffer.

After opening a file, the parinfer-mode enable Indent Mode if it won't make any changes. Otherwise, Paren Mode will be enabled, you can switch to Indent Mode manually later.

Alternatively, you can use parinfer-diff command to see how will Indent Mode modify the buffer with Ediff.

[[file:images/diff_demo.gif]]

And there are some keybindings in Ediff: | Key | Description | |------+-----------------------------------------------------------| | q | Quit diff. | | b | B->A in Ediff, this can apply change to your origin code. | | ra | Restore A in Ediff, this can revert change. | | n | Move to next difference. | | p | Move to previous difference. |

Also, There's a command parinfer-auto-fix to fix wrong indentation for whole buffer. (Only works with balanced parens)

• Configurations ** parinfer-auto-switch-indent-mode #+BEGIN_SRC emacs-lisp (setq parinfer-auto-switch-indent-mode nil) ;; default #+END_SRC

t for enable, Parinfer will auto switch to Indent Mode whenever parens are balance in Paren Mode.

** parinfer-auto-switch-indent-mode-when-closing #+BEGIN_SRC emacs-lisp (setq parinfer-auto-switch-indent-mode-when-closing nil) ;; default #+END_SRC

t for enable, Parinfer will auto switch to Indent Mode when the inserted close parens (), ], }) balance the parens of current sexp. ** parinfer-delay-invoke-threshold #+BEGIN_SRC emacs-lisp (setq parinfer-delay-invoke-threshold 6000) ;; default #+END_SRC

When the length of text for processing is longer than this, Parinfer will process text after a idle delay instead of process immediately.

** parinfer-delay-invoke-idle #+BEGIN_SRC emacs-lisp (setq parinfer-delay-invoke-idle 0.3) ;; default #+END_SRC

The idle seconds before Parinfer processing text on large sexp.

** parinfer-extensions #+BEGIN_SRC emacs-lisp (setq parinfer-extensions '(defaults pretty-parens smart-yank)) #+END_SRC

The extensions that will be enabled. The list could contain followings:

| Extension | Function | |---------------+---------------------------------------------------------------------------------------| | defaults | Should be enabled, basic compatibility | | pretty-parens | Use dim style for Indent Mode, rainbow delimiters for Paren Mode | | smart-yank | Yank will preserve indentation in Indent Mode, will preserve parens in Paren Mode | | smart-tab | C-f & C-b on empty line will goto next/previous import indentation. | | paredit | Introduce some paredit commands from paredit-mode. | | lispy | Integration with Lispy. | | evil | Integration with Evil. | | one | Experimental on fuzz Indent Mode and Paren Mode. Not recommanded. |

** parinfer-lighters #+BEGIN_SRC emacs-lisp (setq parinfer-lighters '(" Parinfer:Indent" . "Parinfer:Paren")) #+END_SRC

• Troubleshooting If Parinfer seems to be indenting incorrectly, ensure indent-tabs-mode is set to nil via (setq-default indent-tabs-mode nil). While Parinfer's theoretical model is able to correctly handle indentation with tabs, parinfer-mode can currently only handle indentation using spaces.

• Credits

• [[https://github.com/shaunlebron][shaunlebron]] :: Create [[https://shaunlebron.github.io/parinfer/][Parinfer]].
• [[https://github.com/oakmac][oakmac]] :: Bring Parinfer to Emacs with [[https://github.com/oakmac/parinfer-elisp][parinfer-elisp]].
• [[https://github.com/tumashu][tumashu]] :: Help me a lot in writing this plugin.
• [[https://github.com/purcell][purcell]] & [[https://github.com/syohex][syohex]] :: Advice and Tips for writing emacs plugin

• Contribution Please open an issue if there's any bug or suggestion, and PR is welcomed!

• License parinferlib.el from [[https://github.com/oakmac/parinfer-elisp][parinfer-elisp]], is licensed under the [[https://github.com/oakmac/parinfer-elisp/blob/master/LICENSE.md][ISC]].

Rest part licensed under the GPLv3.