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;;; elisp.el --- My configurations of Emacs Lisp mode -*- lexical-binding: t; -*-
;;; Commentary:
;; Some personal configurations.
;;; Code:
;;; Hide Eldoc in the mode line
;; The original value is eldoc-minor-mode-string
(durand-hide-minor-mode eldoc-mode)
;;; fontification of extra keywords in emacs lisp files
(require 'advice)
(font-lock-add-keywords
'emacs-lisp-mode
`(("^;;;###\\(autoload\\)[ \n]" (1 font-lock-preprocessor-face t))
(emacs-lisp-highlight-vars-and-faces . emacs-lisp-face)
("\\(\\(?:#'\\|['`]\\)\\)\\(?:[[:space:]]*\\(\\(?:\\sw\\|\\s_\\)+\\)\\)?"
(1 font-lock-keyword-face)
(2 font-lock-constant-face nil t)))
'append)
;;;###autoload
(defvar emacs-lisp-face nil
"The face used to highlight extra Emacs Lisp keywords.")
;;;###autoload
(defun emacs-lisp-highlight-vars-and-faces (end)
"Find special things to highlight within the confine of END."
(catch 'matcher
(while (re-search-forward "\\(?:\\sw\\|\\s_\\)+" end t)
(let ((ppss (save-excursion (syntax-ppss))))
(cond ((nth 3 ppss) ; strings
(search-forward "\"" end t))
((nth 4 ppss) ; comments
(forward-line +1))
((let* ((symbol (intern-soft (match-string-no-properties 0)))
(paren-starts (nth 9 ppss)))
(and (cond ((null symbol) nil)
((eq symbol t) nil)
((keywordp symbol) nil)
((special-variable-p symbol)
(setq emacs-lisp-face 'font-lock-variable-name-face))
((let ((quote-before-p
(mapcar
(function
(lambda (start)
(let ((temp-char (char-before start)))
(cond
((eq temp-char ?`) 1)
((eq temp-char ?') 2)))))
paren-starts)))
(and (fboundp symbol)
(eq (char-before (match-beginning 0)) ?\()
(not
(or (memq 2 quote-before-p)
(and (memq 1 quote-before-p)
(not
(or (eq (char-before
(max (1- (match-beginning 0))
(point-min)))
?,)
(eq (char-before
(max (- (match-beginning 0) 2)
(point-min)))
?,))))))
;; (not (memq (char-before (1- (match-beginning 0)))
;; (list ?\' ?\`)))
))
(let ((unaliased (indirect-function symbol)))
(cond ((special-form-p unaliased)
(setq emacs-lisp-face 'font-lock-constant-face))
((macrop unaliased)
(setq emacs-lisp-face 'font-lock-keyword-face))
(t
(let (unadvised)
(while (not (eq (setq unadvised (ad-get-orig-definition unaliased))
(setq unaliased (indirect-function unadvised)))))
unaliased)
(setq emacs-lisp-face
(if (subrp unaliased)
'font-lock-builtin-face
'font-lock-function-name-face)))))))
(throw 'matcher t)))))))
nil))
;;; highlight parentheses
(require 'paren)
(set 'show-paren-style 'parenthesis)
(set 'show-paren-highlight-openparen t)
(set 'show-paren-when-point-in-periphery nil)
(set 'show-paren-when-point-inside-paren nil)
(add-hook 'emacs-lisp-mode-hook #'show-paren-mode)
;;; remember cursor position
(require 'saveplace)
(set 'save-place-file (expand-file-name "saveplace" load-file-directory))
(set 'save-place-forget-unreadable-files t)
(save-place-mode 1)
;;; a better indentation
(advice-add #'calculate-lisp-indent :override #'better-calculate-lisp-indent)
;;;###autoload
(defun better-calculate-lisp-indent (&optional parse-start)
"Add better indentation for quoted and backquoted lists.
PARSE-START is the starting position of the parse."
;; This line because `calculate-lisp-indent-last-sexp` was defined with `defvar`
;; with it's value ommited, marking it special and only defining it locally. So
;; if you don't have this, you'll get a void variable error.
(defvar calculate-lisp-indent-last-sexp)
(save-excursion
(beginning-of-line)
(let ((indent-point (point))
state
;; setting this to a number inhibits calling hook
(desired-indent nil)
(retry t)
calculate-lisp-indent-last-sexp containing-sexp)
(cond ((or (markerp parse-start) (integerp parse-start))
(goto-char parse-start))
((null parse-start) (beginning-of-defun))
(t (setq state parse-start)))
(unless state
;; Find outermost containing sexp
(while (< (point) indent-point)
(setq state (parse-partial-sexp (point) indent-point 0))))
;; Find innermost containing sexp
(while (and retry
state
(> (elt state 0) 0))
(setq retry nil)
(setq calculate-lisp-indent-last-sexp (elt state 2))
(setq containing-sexp (elt state 1))
;; Position following last unclosed open.
(goto-char (1+ containing-sexp))
;; Is there a complete sexp since then?
(if (and calculate-lisp-indent-last-sexp
(> calculate-lisp-indent-last-sexp (point)))
;; Yes, but is there a containing sexp after that?
(let ((peek (parse-partial-sexp calculate-lisp-indent-last-sexp
indent-point 0)))
(if (setq retry (car (cdr peek))) (setq state peek)))))
(if retry
nil
;; Innermost containing sexp found
(goto-char (1+ containing-sexp))
(if (not calculate-lisp-indent-last-sexp)
;; indent-point immediately follows open paren.
;; Don't call hook.
(setq desired-indent (current-column))
;; Find the start of first element of containing sexp.
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
(cond ((looking-at "\\s(")
;; First element of containing sexp is a list.
;; Indent under that list.
)
((> (save-excursion (forward-line 1) (point))
calculate-lisp-indent-last-sexp)
;; This is the first line to start within the containing sexp.
;; It's almost certainly a function call.
(if (or
;; Containing sexp has nothing before this line
;; except the first element. Indent under that element.
(= (point) calculate-lisp-indent-last-sexp)
;; First sexp after `containing-sexp' is a keyword. This
;; condition is more debatable. It's so that I can have
;; unquoted plists in macros. It assumes that you won't
;; make a function whose name is a keyword.
;; (when-let (char-after (char-after (1+ containing-sexp)))
;; (char-equal char-after ?:))
;; Check for quotes or backquotes around.
(let* ((positions (elt state 9))
(last (car (last positions)))
(rest (reverse (butlast positions)))
(any-quoted-p nil)
(point nil))
(or
(when-let (char (char-before last))
(or (char-equal char ?')
(char-equal char ?`)))
(progn
(while (and rest (not any-quoted-p))
(setq point (pop rest))
(setq any-quoted-p
(or
(when-let (char (char-before point))
(or (char-equal char ?')
(char-equal char ?`)))
(save-excursion
(goto-char (1+ point))
(looking-at-p
"\\(?:back\\)?quote[\t\n\f\s]+(")))))
any-quoted-p))))
;; Containing sexp has nothing before this line
;; except the first element. Indent under that element.
nil
;; Skip the first element, find start of second (the first
;; argument of the function call) and indent under.
(progn (forward-sexp 1)
(parse-partial-sexp (point)
calculate-lisp-indent-last-sexp
0 t)))
(backward-prefix-chars))
(t
;; Indent beneath first sexp on same line as
;; `calculate-lisp-indent-last-sexp'. Again, it's
;; almost certainly a function call.
(goto-char calculate-lisp-indent-last-sexp)
(beginning-of-line)
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp
0 t)
(backward-prefix-chars)))))
;; Point is at the point to indent under unless we are inside a string.
;; Call indentation hook except when overridden by lisp-indent-offset
;; or if the desired indentation has already been computed.
(let ((normal-indent (current-column)))
(cond ((elt state 3)
;; Inside a string, don't change indentation.
nil)
((and (integerp lisp-indent-offset) containing-sexp)
;; Indent by constant offset
(goto-char containing-sexp)
(+ (current-column) lisp-indent-offset))
;; in this case calculate-lisp-indent-last-sexp is not nil
(calculate-lisp-indent-last-sexp
(or
;; try to align the parameters of a known function
(and lisp-indent-function
(not retry)
(funcall lisp-indent-function indent-point state))
;; If the function has no special alignment
;; or it does not apply to this argument,
;; try to align a constant-symbol under the last
;; preceding constant symbol, if there is such one of
;; the last 2 preceding symbols, in the previous
;; uncommented line.
(and (save-excursion
(goto-char indent-point)
(skip-chars-forward " \t")
(looking-at ":"))
;; The last sexp may not be at the indentation
;; where it begins, so find that one, instead.
(save-excursion
(goto-char calculate-lisp-indent-last-sexp)
;; Handle prefix characters and whitespace
;; following an open paren. (Bug#1012)
(backward-prefix-chars)
(while (not (or (looking-back "^[ \t]*\\|([ \t]+"
(line-beginning-position))
(and containing-sexp
(>= (1+ containing-sexp) (point)))))
(forward-sexp -1)
(backward-prefix-chars))
(setq calculate-lisp-indent-last-sexp (point)))
(> calculate-lisp-indent-last-sexp
(save-excursion
(goto-char (1+ containing-sexp))
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
(point)))
(let ((parse-sexp-ignore-comments t)
indent)
(goto-char calculate-lisp-indent-last-sexp)
(or (and (looking-at ":")
(setq indent (current-column)))
(and (< (line-beginning-position)
(prog2 (backward-sexp) (point)))
(looking-at ":")
(setq indent (current-column))))
indent))
;; another symbols or constants not preceded by a constant
;; as defined above.
normal-indent))
;; in this case calculate-lisp-indent-last-sexp is nil
(desired-indent)
(t
normal-indent))))))
(provide 'elisp)
;;; elisp.el ends here
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