summaryrefslogtreecommitdiff
path: root/elisp.el
blob: c1c62fb837bb184aa714d90dbd08037f930e5c9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
;;; 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