summary refs log tree commit diff stats
path: root/lisp/+modeline.el
blob: 5f46a7523bf33a65ddd13434af131181fa32cb61 (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
;;; +modeline.el --- my modeline customizations -*- lexical-binding: t; -*-

;;; Commentary:

;; `+modeline.el' is kind of a dumping ground for various
;; modeline-related functions.  I probably don't use everything in
;; here.  Credit given where possible.

;;; Code:

(require '+util)
(require 'simple-modeline)
(require 'minions)

(defgroup +modeline nil
  "Various customization options for my modeline things."
  :prefix "+modeline-"
  :group 'simple-modeline)

(defcustom +modeline-default-spacer " "
  "Default spacer to use for modeline elements.
All modeline elements take an optional argument, `spacer', which
will default to this string.")

;;; Combinators

(defun +modeline-concat (segments &optional separator)
  "Concatenate multiple `simple-modeline'-style SEGMENTS.
SEGMENTS is a list of either modeline segment-functions (see
`simple-modeline' functions for an example of types of
functions), though it can also contain cons cells of the
form (SEGMENT . PREDICATE).

Segments are separated from each other using SEPARATOR, which
defaults to a \" \".  space.  Only segments that evaluate to a
non-trivial string (that is, a string not equal to \"\") will be
separated, for a cleaner look.

This function makes a lambda, so you can throw it straight into
`simple-modeline-segments'."
  (setq separator (or separator +modeline-default-spacer))
  (lambda ()
    (apply #'concat
           (let (this-sep result-list)
                          (dolist (segment segments)
                            (push (funcall (or (car-safe segment) segment)
                                           this-sep)
                                  result-list)
                            (if (or (cdr-safe segment)
                                    (and (car result-list)
                                         (not (equal (car result-list) ""))))
                                (setq this-sep separator)
                              (setq this-sep nil)))
                          (unless (seq-some #'null result-list)
                            (push +modeline-default-spacer result-list))
                          (nreverse result-list)))))

;;; Modeline segments

(defun +modeline-buffer-name (&optional spacer)         ; gonsie
  "Display the buffer name."
  (concat (or spacer +modeline-default-spacer)
          (propertize
           (+string-align (buffer-name) 20 :ellipsis nil)
           'help-echo (or (buffer-file-name)
                          (buffer-name))
           'mouse-face 'mode-line-highlight)))

(defcustom +modeline-minions-icon "&"
  "The \"icon\" for `+modeline-minions' button."
  :type 'string)

(defun +modeline-minions (&optional spacer)
  "Display a button for `minions-minor-modes-menu'."
  (concat (or spacer +modeline-default-spacer)
          (propertize
           +modeline-minions-icon
           'help-echo "Minor modes menu\nmouse-1: show menu."
           'local-map (purecopy (simple-modeline-make-mouse-map
                                 'mouse-1
                                 (lambda (event)
                                   (interactive "e")
                                   (with-selected-window
                                       (posn-window (event-start event))
                                     (minions-minor-modes-menu)))))
           'mouse-face 'mode-line-highlight)))

(defun +modeline-major-mode (&optional spacer)
  "Display the current `major-mode'."
  (concat (or spacer +modeline-default-spacer)
          (propertize (+string-truncate (format-mode-line mode-name)
                                        12 "~")
                      'face 'bold
                      'keymap mode-line-major-mode-keymap
                      'mouse-face 'mode-line-highlight)))

(defcustom +modeline-modified-icon-alist '((ephemeral . "*")
                                           (readonly . "=")
                                           (modified  . "+")
                                           (special . "~")
                                           (t . "-"))
  "\"Icons\" to display depending on buffer status in modeline.
The CAR of each field is one of `readonly', `modified',
`special', `ephemeral', or t, and the CDR is a string to display
in that mode.

`readonly' is true if the buffer is read-only and visiting a file.
`modified' is true if the buffer is modified.
`special' is true if the buffer is a special-mode or derived buffer.
`ephemeral' is true if the buffer is not visiting a file.
t is the fall-back, shown when nothing else in the alist applies.

The order of elements matters: whichever one matches first is applied."
  :type '(alist :key-type symbol
                :value-type string)
  :options '("readonly" "modified" "special" "t"))

(defcustom +modeline-modified-icon-special-modes '(special-mode)
  "Modes to apply the `special-mode' icon to in the
`+modeline-modified'."
  :type '(repeat function))

(defun +modeline-modified (&optional spacer) ; modified from `simple-modeline-status-modified'
  "Display a color-coded \"icon\" indicator for the buffer's status."
  (let* ((icon (catch :icon
                (dolist (cell +modeline-modified-icon-alist)
                  (when (pcase (car cell)
                          ('ephemeral (not (buffer-file-name)))
                          ('readonly buffer-read-only)
                          ('modified (buffer-modified-p))
                          ('special
                           (apply 'derived-mode-p
                                  +modeline-modified-icon-special-modes))
                          ('t t)
                          (_ nil))
                    (throw :icon (cdr cell)))))))
    (concat (or spacer +modeline-default-spacer)
            (propertize (or icon "")
                        'mouse-face 'mode-line-highlight))))

(defun +modeline-buffer-modes (&optional spacer)
  "Display various buffer-specific stuff cleanly."
  ;; This is clunky and should probably be improved.
  (concat (+modeline-reading-mode)
          (+modeline-narrowed (when reading-mode ","))))

(defun +modeline-narrowed (&optional spacer)
  "Display an indication that the buffer is narrowed."
  (when (buffer-narrowed-p)
    (concat (or spacer +modeline-default-spacer)
            (propertize "N"
                        'help-echo (format "%s\n%s"
                                           "Buffer is narrowed."
                                           "mouse-2: widen buffer.")
                        'local-map (purecopy (simple-modeline-make-mouse-map
                                              'mouse-2 'mode-line-widen))
                        'face 'font-lock-doc-face
                        'mouse-face 'mode-line-highlight))))

(defun +modeline-reading-mode (&optional spacer)
  "Display an indication that the buffer is in `reading-mode'."
  (when reading-mode
    (concat (or spacer +modeline-default-spacer)
            (propertize
             (concat "R" (when (bound-and-true-p +eww-readable-p) "w"))
             'help-echo (format "%s\n%s"
                                "Buffer is in reading-mode."
                                "mouse-2: disable reading-mode.")
             'local-map (purecopy
                         (simple-modeline-make-mouse-map
                          'mouse-2 (lambda (ev)
                                     (interactive "e")
                                     (with-selected-window
                                         (posn-window
                                          (event-start ev))
                                       (reading-mode -1)
                                       (force-mode-line-update)))))
             'face 'font-lock-doc-face
             'mouse-face 'mode-line-highlight))))

(define-minor-mode file-percentage-mode
  "Toggle the percentage display in the mode line (File Percentage Mode)."
  :init-value t :global t :group 'mode-line)

(defun +modeline-position (&optional _) ; adapted from `simple-modeline'
  "Display the current cursor position."
  (list '((line-number-mode
           ((column-number-mode
             (column-number-indicator-zero-based
              (9 " %l:%c")
              (9 " %l:%C"))
             (6 " %l:")))
           ((column-number-mode
             (column-number-indicator-zero-based
              (5 " :%c")
              (5 " :%C"))))))
        '(file-percentage-mode
          ((-3 "%p") "%% "))
        (if (region-active-p)
            (propertize (format "%s%-5d"
                                (if (and (mark) (< (point) (mark))) "-" "+")
                                (apply '+ (mapcar
                                           (lambda (pos)
                                             (- (cdr pos)
                                                (car pos)))
                                           (region-bounds))))
                        'font-lock-face 'font-lock-variable-name-face))))

(defun +modeline-vc (&optional spacer)
  "Display the version control branch of the current buffer in the modeline."
  ;; from https://www.gonsie.com/blorg/modeline.html, from Doom
  (if-let ((backend (vc-backend buffer-file-name)))
      (concat (or spacer +modeline-default-spacer)
              (substring vc-mode (+ (if (eq backend 'Hg) 2 3) 2)))))

(defun +modeline-track (&optional spacer)
  "Display `tracking-mode' information."
  (when tracking-mode
    tracking-mode-line-buffers))

(defun +modeline-anzu (&optional spacer)
  "Display `anzu--update-mode-line'."
  (concat (or spacer +modeline-default-spacer)
          (anzu--update-mode-line)))

(defun +modeline-text-scale (&optional spacer)
  "Display text scaling level."
  ;; adapted from https://github.com/seagle0128/doom-modeline
  (when (and (boundp 'text-scale-mode-amount)
             (/= text-scale-mode-amount 0))
    (format (if (> text-scale-mode-amount 0) "%s(%+d)" "%s(%-d)")
            (or spacer +modeline-default-spacer)
            text-scale-mode-amount)))

(defun +modeline-ace-window-display (&optional spacer)
  "Display `ace-window-display-mode' information in the modeline."
  (when (and +ace-window-display-mode
             ace-window-mode)
    (concat (or spacer +modeline-default-spacer)
            (window-parameter (selected-window) 'ace-window-path))))

(provide '+modeline)
;;; +modeline.el ends here