d59c79a8d4
I'm sorry. I really wanted to improve my commit discipline. I know. I can't be fucked to comb this diff and split it into 8 properly-ordered commits, like I know I should. I'm not having a good time right now. We'll do better moving forward.
73 lines
2.6 KiB
EmacsLisp
73 lines
2.6 KiB
EmacsLisp
;;; emacs-lisp.el -*- lexical-binding: t; -*-
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(require 'syd-handle-repl)
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(require 'syd-handle-lookup)
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(require 'syd-handle-eval)
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;; (require 'handle)
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;; Don't `use-package' `ielm', since it's loaded by Emacs. You'll get weird
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;; autoload errors if you do.
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;; https://www.reddit.com/r/emacs/comments/q7fjbi/comment/lml127d
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(use-package emacs
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:custom ((ielm-history-file-name ; Stay out of my config dir!
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(file-name-concat syd-cache-dir "ielm-history.eld"))))
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(defun syd/open-emacs-lisp-repl ()
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(interactive)
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(pop-to-buffer
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(or (get-buffer "*ielm*")
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(progn (ielm) ; Creates the *ielm* buffer.
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(let ((b (get-buffer "*ielm*")))
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;; We leave it to the enclosing `pop-to-buffer' to display the
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;; buffer.
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(bury-buffer b)
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b)))))
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(defun syd-emacs-lisp-lookup-documentation (identifier)
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"Lookup IDENTIFIER with `describe-symbol'"
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;; HACK: Much to my frustration, `describe-symbol' has no defined
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;; return value. To test if the call was successful or not, we
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;; check if any window is displaying the help buffer. This probably
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;; breaks if `syd-emacs-lisp-lookup-documentation' is called while
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;; the help buffer is already open.
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(describe-symbol (intern identifier))
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(let ((buffer (get-buffer (help-buffer))))
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(and (get-buffer-window-list buffer)
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buffer)))
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(set-repl-handler! 'emacs-lisp-mode
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#'syd/open-emacs-lisp-repl)
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;;;###autoload
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(defun syd-emacs-lisp-eval (beg end)
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"Evaluate a region and print it to the echo area (if one line long), otherwise
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to a pop up buffer."
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(syd-eval-display-results
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(string-trim-right
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(let ((buffer (generate-new-buffer " *eval-output*"))
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(debug-on-error t))
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(unwind-protect
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(condition-case-unless-debug e
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(progn (eval-region beg end buffer load-read-function)
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(with-current-buffer buffer
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(let ((pp-max-width nil))
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(require 'pp)
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(pp-buffer)
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(replace-regexp-in-string
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"\\\\n" "\n" (string-trim-left (buffer-string))))))
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(error (format "ERROR: %s" e)))
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(kill-buffer buffer))))
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:source-buffer (current-buffer)
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:force-popup current-prefix-arg))
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(set-eval-handler! 'emacs-lisp-mode
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#'syd-emacs-lisp-eval)
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(defun syd-emacs-set-handlers ()
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(setq-local syd-lookup-documentation-handlers
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(list #'syd-emacs-lisp-lookup-documentation)))
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(add-hook 'emacs-lisp-mode-hook #'syd-emacs-set-handlers)
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(provide 'syd-lang-emacs-lisp)
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