about summary refs log tree commit diff
path: root/exwm-layout.el
blob: 79d0c95bcd47d1a9aa1b2097996e9829e256c6ca (plain) (blame)
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
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
;;; exwm-layout.el --- Layout Module for EXWM  -*- lexical-binding: t -*-

;; Copyright (C) 2015-2020 Free Software Foundation, Inc.

;; Author: Chris Feng <chris.w.feng@gmail.com>

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This module is responsible for keeping X client window properly displayed.

;;; Code:

(require 'exwm-core)

(defgroup exwm-layout nil
  "Layout."
  :version "25.3"
  :group 'exwm)

(defcustom exwm-layout-auto-iconify t
  "Non-nil to automatically iconify unused X windows when possible."
  :type 'boolean)

(defcustom exwm-layout-show-all-buffers nil
  "Non-nil to allow switching to buffers on other workspaces."
  :type 'boolean)

(defconst exwm-layout--floating-hidden-position -101
  "Where to place hidden floating X windows.")

(defvar exwm-layout--other-buffer-exclude-buffers nil
  "List of buffers that should not be selected by `other-buffer'.")

(defvar exwm-layout--other-buffer-exclude-exwm-mode-buffers nil
  "When non-nil, prevent EXWM buffers from being selected by `other-buffer'.")

(defvar exwm-layout--timer nil "Timer used to track echo area changes.")

(defvar exwm-workspace--current)
(defvar exwm-workspace--frame-y-offset)
(declare-function exwm-input--release-keyboard "exwm-input.el")
(declare-function exwm-input--grab-keyboard "exwm-input.el")
(declare-function exwm-input-grab-keyboard "exwm-input.el")
(declare-function exwm-workspace--active-p "exwm-workspace.el" (frame))
(declare-function exwm-workspace--client-p "exwm-workspace.el"
                  (&optional frame))
(declare-function exwm-workspace--minibuffer-own-frame-p "exwm-workspace.el")
(declare-function exwm-workspace--workspace-p "exwm-workspace.el"
                  (workspace))
(declare-function exwm-workspace-move-window "exwm-workspace.el"
                  (frame-or-index &optional id))

(defun exwm-layout--set-state (id state)
  "Set WM_STATE."
  (exwm--log "id=#x%x" id)
  (xcb:+request exwm--connection
      (make-instance 'xcb:icccm:set-WM_STATE
                     :window id :state state :icon xcb:Window:None))
  (with-current-buffer (exwm--id->buffer id)
    (setq exwm-state state)))

(defun exwm-layout--iconic-state-p (&optional id)
  (= xcb:icccm:WM_STATE:IconicState
     (if id
         (buffer-local-value 'exwm-state (exwm--id->buffer id))
       exwm-state)))

(defun exwm-layout--set-ewmh-state (xwin)
  "Set _NET_WM_STATE."
  (with-current-buffer (exwm--id->buffer xwin)
    (xcb:+request exwm--connection
        (make-instance 'xcb:ewmh:set-_NET_WM_STATE
                       :window exwm--id
                       :data exwm--ewmh-state))))

(defun exwm-layout--fullscreen-p ()
  (when (derived-mode-p 'exwm-mode)
    (memq xcb:Atom:_NET_WM_STATE_FULLSCREEN exwm--ewmh-state)))

(defun exwm-layout--auto-iconify ()
  (when (and exwm-layout-auto-iconify
             (not exwm-transient-for))
    (let ((xwin exwm--id)
          (state exwm-state))
      (dolist (pair exwm--id-buffer-alist)
        (with-current-buffer (cdr pair)
          (when (and exwm--floating-frame
                     (eq exwm-transient-for xwin)
                     (not (eq exwm-state state)))
            (if (eq state xcb:icccm:WM_STATE:NormalState)
                (exwm-layout--refresh-floating exwm--floating-frame)
              (exwm-layout--hide exwm--id))))))))

(defun exwm-layout--show (id &optional window)
  "Show window ID exactly fit in the Emacs window WINDOW."
  (exwm--log "Show #x%x in %s" id window)
  (let* ((edges (window-inside-absolute-pixel-edges window))
         (x (pop edges))
         (y (pop edges))
         (width (- (pop edges) x))
         (height (- (pop edges) y))
         frame-x frame-y frame-width frame-height)
    (with-current-buffer (exwm--id->buffer id)
      (when exwm--floating-frame
        (setq frame-width (frame-pixel-width exwm--floating-frame)
              frame-height (+ (frame-pixel-height exwm--floating-frame)
                              ;; Use `frame-outer-height' in the future.
                              exwm-workspace--frame-y-offset))
        (when exwm--floating-frame-position
          (setq frame-x (elt exwm--floating-frame-position 0)
                frame-y (elt exwm--floating-frame-position 1)
                x (+ x frame-x (- exwm-layout--floating-hidden-position))
                y (+ y frame-y (- exwm-layout--floating-hidden-position)))
          (setq exwm--floating-frame-position nil))
        (exwm--set-geometry (frame-parameter exwm--floating-frame
                                             'exwm-container)
                            frame-x frame-y frame-width frame-height))
      (when (exwm-layout--fullscreen-p)
        (with-slots ((x* x)
                     (y* y)
                     (width* width)
                     (height* height))
            (exwm-workspace--get-geometry exwm--frame)
          (setq x x*
                y y*
                width width*
                height height*)))
      (exwm--set-geometry id x y width height)
      (xcb:+request exwm--connection (make-instance 'xcb:MapWindow :window id))
      (exwm-layout--set-state id xcb:icccm:WM_STATE:NormalState)
      (setq exwm--ewmh-state
            (delq xcb:Atom:_NET_WM_STATE_HIDDEN exwm--ewmh-state))
      (exwm-layout--set-ewmh-state id)
      (exwm-layout--auto-iconify)))
  (xcb:flush exwm--connection))

(defun exwm-layout--hide (id)
  "Hide window ID."
  (with-current-buffer (exwm--id->buffer id)
    (unless (or (exwm-layout--iconic-state-p)
                (and exwm--floating-frame
                     (eq 4294967295. exwm--desktop)))
      (exwm--log "Hide #x%x" id)
      (when exwm--floating-frame
        (let* ((container (frame-parameter exwm--floating-frame
                                           'exwm-container))
               (geometry (xcb:+request-unchecked+reply exwm--connection
                             (make-instance 'xcb:GetGeometry
                                            :drawable container))))
          (setq exwm--floating-frame-position
                (vector (slot-value geometry 'x) (slot-value geometry 'y)))
          (exwm--set-geometry container exwm-layout--floating-hidden-position
                              exwm-layout--floating-hidden-position
                              1
                              1)))
      (xcb:+request exwm--connection
          (make-instance 'xcb:ChangeWindowAttributes
                         :window id :value-mask xcb:CW:EventMask
                         :event-mask xcb:EventMask:NoEvent))
      (xcb:+request exwm--connection
          (make-instance 'xcb:UnmapWindow :window id))
      (xcb:+request exwm--connection
          (make-instance 'xcb:ChangeWindowAttributes
                         :window id :value-mask xcb:CW:EventMask
                         :event-mask (exwm--get-client-event-mask)))
      (exwm-layout--set-state id xcb:icccm:WM_STATE:IconicState)
      (cl-pushnew xcb:Atom:_NET_WM_STATE_HIDDEN exwm--ewmh-state)
      (exwm-layout--set-ewmh-state id)
      (exwm-layout--auto-iconify)
      (xcb:flush exwm--connection))))

;;;###autoload
(cl-defun exwm-layout-set-fullscreen (&optional id)
  "Make window ID fullscreen."
  (interactive)
  (exwm--log "id=#x%x" (or id 0))
  (unless (and (or id (derived-mode-p 'exwm-mode))
               (not (exwm-layout--fullscreen-p)))
    (cl-return-from exwm-layout-set-fullscreen))
  (with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
    ;; Expand the X window to fill the whole screen.
    (with-slots (x y width height) (exwm-workspace--get-geometry exwm--frame)
      (exwm--set-geometry exwm--id x y width height))
    ;; Raise the X window.
    (xcb:+request exwm--connection
        (make-instance 'xcb:ConfigureWindow
                       :window exwm--id
                       :value-mask (logior xcb:ConfigWindow:BorderWidth
                                           xcb:ConfigWindow:StackMode)
                       :border-width 0
                       :stack-mode xcb:StackMode:Above))
    (cl-pushnew xcb:Atom:_NET_WM_STATE_FULLSCREEN exwm--ewmh-state)
    (exwm-layout--set-ewmh-state exwm--id)
    (xcb:flush exwm--connection)
    (set-window-dedicated-p (get-buffer-window) t)
    (exwm-input--release-keyboard exwm--id)))

;;;###autoload
(cl-defun exwm-layout-unset-fullscreen (&optional id)
  "Restore window from fullscreen state."
  (interactive)
  (exwm--log "id=#x%x" (or id 0))
  (unless (and (or id (derived-mode-p 'exwm-mode))
               (exwm-layout--fullscreen-p))
    (cl-return-from exwm-layout-unset-fullscreen))
  (with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
    (setq exwm--ewmh-state
          (delq xcb:Atom:_NET_WM_STATE_FULLSCREEN exwm--ewmh-state))
    (if exwm--floating-frame
        (exwm-layout--show exwm--id (frame-root-window exwm--floating-frame))
      (xcb:+request exwm--connection
          (make-instance 'xcb:ConfigureWindow
                         :window exwm--id
                         :value-mask (logior xcb:ConfigWindow:Sibling
                                             xcb:ConfigWindow:StackMode)
                         :sibling exwm--guide-window
                         :stack-mode xcb:StackMode:Above))
      (let ((window (get-buffer-window nil t)))
        (when window
          (exwm-layout--show exwm--id window))))
    (setq exwm--ewmh-state
          (delq xcb:Atom:_NET_WM_STATE_FULLSCREEN exwm--ewmh-state))
    (exwm-layout--set-ewmh-state exwm--id)
    (xcb:flush exwm--connection)
    (set-window-dedicated-p (get-buffer-window) nil)
    (when (eq 'line-mode exwm--selected-input-mode)
      (exwm-input--grab-keyboard exwm--id))))

;;;###autoload
(cl-defun exwm-layout-toggle-fullscreen (&optional id)
  "Toggle fullscreen mode."
  (interactive (list (exwm--buffer->id (window-buffer))))
  (exwm--log "id=#x%x" (or id 0))
  (unless (or id (derived-mode-p 'exwm-mode))
    (cl-return-from exwm-layout-toggle-fullscreen))
  (when id
    (with-current-buffer (exwm--id->buffer id)
      (if (exwm-layout--fullscreen-p)
          (exwm-layout-unset-fullscreen id)
        (exwm-layout-set-fullscreen id)))))

(defun exwm-layout--other-buffer-predicate (buffer)
  "Return non-nil when the BUFFER may be displayed in selected frame.

Prevents EXWM-mode buffers already being displayed on some other window from
being selected.

Should be set as `buffer-predicate' frame parameter for all
frames.  Used by `other-buffer'.

When variable `exwm-layout--other-buffer-exclude-exwm-mode-buffers'
is t EXWM buffers are never selected by `other-buffer'.

When variable `exwm-layout--other-buffer-exclude-buffers' is a
list of buffers, EXWM buffers belonging to that list are never
selected by `other-buffer'."
  (or (not (with-current-buffer buffer (derived-mode-p 'exwm-mode)))
      (and (not exwm-layout--other-buffer-exclude-exwm-mode-buffers)
           (not (memq buffer exwm-layout--other-buffer-exclude-buffers))
           ;; Do not select if already shown in some window.
           (not (get-buffer-window buffer t)))))

(defun exwm-layout--set-client-list-stacking ()
  "Set _NET_CLIENT_LIST_STACKING."
  (exwm--log)
  (let (id clients-floating clients clients-iconic clients-other)
    (dolist (pair exwm--id-buffer-alist)
      (setq id (car pair))
      (with-current-buffer (cdr pair)
        (if (eq exwm--frame exwm-workspace--current)
            (if exwm--floating-frame
                ;; A floating X window on the current workspace.
                (setq clients-floating (cons id clients-floating))
              (if (get-buffer-window (cdr pair) exwm-workspace--current)
                  ;; A normal tilling X window on the current workspace.
                  (setq clients (cons id clients))
                ;; An iconic tilling X window on the current workspace.
                (setq clients-iconic (cons id clients-iconic))))
          ;; X window on other workspaces.
          (setq clients-other (cons id clients-other)))))
    (xcb:+request exwm--connection
        (make-instance 'xcb:ewmh:set-_NET_CLIENT_LIST_STACKING
                       :window exwm--root
                       :data (vconcat (append clients-other clients-iconic
                                              clients clients-floating))))))

(defun exwm-layout--refresh (&optional frame)
  "Refresh layout."
  ;; `window-size-change-functions' sets this argument while
  ;; `window-configuration-change-hook' makes the frame selected.
  (unless frame
    (setq frame (selected-frame)))
  (exwm--log "frame=%s" frame)
  (if (not (exwm-workspace--workspace-p frame))
      (if (frame-parameter frame 'exwm-outer-id)
          (exwm-layout--refresh-floating frame)
        (exwm-layout--refresh-other frame))
    (exwm-layout--refresh-workspace frame)))

(defun exwm-layout--refresh-floating (frame)
  "Refresh floating frame FRAME."
  (exwm--log "Refresh floating %s" frame)
  (let ((window (frame-first-window frame)))
    (with-current-buffer (window-buffer window)
      (when (and (derived-mode-p 'exwm-mode)
                 ;; It may be a buffer waiting to be killed.
                 (exwm--id->buffer exwm--id))
        (exwm--log "Refresh floating window #x%x" exwm--id)
        (if (exwm-workspace--active-p exwm--frame)
            (exwm-layout--show exwm--id window)
          (exwm-layout--hide exwm--id))))))

(defun exwm-layout--refresh-other (frame)
  "Refresh client or nox frame FRAME."
  ;; Other frames (e.g. terminal/graphical frame of emacsclient)
  ;; We shall bury all `exwm-mode' buffers in this case
  (exwm--log "Refresh other %s" frame)
  (let ((windows (window-list frame 'nomini)) ;exclude minibuffer
        (exwm-layout--other-buffer-exclude-exwm-mode-buffers t))
    (dolist (window windows)
      (with-current-buffer (window-buffer window)
        (when (derived-mode-p 'exwm-mode)
          (if (window-prev-buffers window)
              (switch-to-prev-buffer window)
            (switch-to-next-buffer window)))))))

(defun exwm-layout--refresh-workspace (frame)
  "Refresh workspace frame FRAME."
  (exwm--log "Refresh workspace %s" frame)
  ;; Workspaces other than the active one can also be refreshed (RandR)
  (let (covered-buffers   ;EXWM-buffers covered by a new X window.
        vacated-windows)  ;Windows previously displaying EXWM-buffers.
    (dolist (pair exwm--id-buffer-alist)
      (with-current-buffer (cdr pair)
        (when (and (not exwm--floating-frame) ;exclude floating X windows
                   (or exwm-layout-show-all-buffers
                       ;; Exclude X windows on other workspaces
                       (eq frame exwm--frame)))
          (let (;; List of windows in current frame displaying the `exwm-mode'
                ;; buffers.
                (windows (get-buffer-window-list (current-buffer) 'nomini
                                                 frame)))
            (if (not windows)
                (when (eq frame exwm--frame)
                  ;; Hide it if it was being shown in this workspace.
                  (exwm-layout--hide exwm--id))
              (let ((window (car windows)))
                (if (eq frame exwm--frame)
                    ;; Show it if `frame' is active, hide otherwise.
                    (if (exwm-workspace--active-p frame)
                        (exwm-layout--show exwm--id window)
                      (exwm-layout--hide exwm--id))
                  ;; It was last shown in other workspace; move it here.
                  (exwm-workspace-move-window frame exwm--id))
                ;; Vacate any other windows (in any workspace) showing this
                ;; `exwm-mode' buffer.
                (setq vacated-windows
                      (append vacated-windows (remove
                                               window
                                               (get-buffer-window-list
                                                (current-buffer) 'nomini t))))
                ;; Note any `exwm-mode' buffer is being covered by another
                ;; `exwm-mode' buffer.  We want to avoid that `exwm-mode'
                ;; buffer to be reappear in any of the vacated windows.
                (let ((prev-buffer (car-safe
                                    (car-safe (window-prev-buffers window)))))
                  (and
                   prev-buffer
                   (with-current-buffer prev-buffer
                     (derived-mode-p 'exwm-mode))
                   (push prev-buffer covered-buffers)))))))))
    ;; Set some sensible buffer to vacated windows.
    (let ((exwm-layout--other-buffer-exclude-buffers covered-buffers))
      (dolist (window vacated-windows)
        (if (window-prev-buffers window)
            (switch-to-prev-buffer window)
          (switch-to-next-buffer window))))
    ;; Make sure windows floating / on other workspaces are excluded
    (let ((exwm-layout--other-buffer-exclude-exwm-mode-buffers t))
      (dolist (window (window-list frame 'nomini))
        (with-current-buffer (window-buffer window)
          (when (and (derived-mode-p 'exwm-mode)
                     (or exwm--floating-frame (not (eq frame exwm--frame))))
            (if (window-prev-buffers window)
                (switch-to-prev-buffer window)
              (switch-to-next-buffer window))))))
    (exwm-layout--set-client-list-stacking)
    (xcb:flush exwm--connection)))

(defun exwm-layout--on-minibuffer-setup ()
  "Refresh layout when minibuffer grows."
  (exwm--log)
  (unless (exwm-workspace--client-p)
    (exwm--defer 0 (lambda ()
                     (when (< 1 (window-height (minibuffer-window)))
                       (exwm-layout--refresh))))))

(defun exwm-layout--on-echo-area-change (&optional dirty)
  "Run when message arrives or in `echo-area-clear-hook' to refresh layout."
  (when (and (current-message)
             (not (exwm-workspace--client-p))
             (or (cl-position ?\n (current-message))
                 (> (length (current-message))
                    (frame-width exwm-workspace--current))))
    (exwm--log)
    (if dirty
        (exwm-layout--refresh)
      (exwm--defer 0 #'exwm-layout--refresh))))

;;;###autoload
(defun exwm-layout-enlarge-window (delta &optional horizontal)
  "Make the selected window DELTA pixels taller.

If no argument is given, make the selected window one pixel taller.  If the
optional argument HORIZONTAL is non-nil, make selected window DELTA pixels
wider.  If DELTA is negative, shrink selected window by -DELTA pixels.

Normal hints are checked and regarded if the selected window is displaying an
`exwm-mode' buffer.  However, this may violate the normal hints set on other X
windows."
  (interactive "p")
  (exwm--log)
  (cond
   ((zerop delta))                     ;no operation
   ((window-minibuffer-p))             ;avoid resize minibuffer-window
   ((not (and (derived-mode-p 'exwm-mode) exwm--floating-frame))
    ;; Resize on tiling layout
    (unless (= 0 (window-resizable nil delta horizontal nil t)) ;not resizable
      (let ((window-resize-pixelwise t))
        (window-resize nil delta horizontal nil t))))
   ;; Resize on floating layout
   (exwm--fixed-size)                   ;fixed size
   (horizontal
    (let* ((width (frame-pixel-width))
           (edges (window-inside-pixel-edges))
           (inner-width (- (elt edges 2) (elt edges 0)))
           (margin (- width inner-width)))
      (if (> delta 0)
          (if (not exwm--normal-hints-max-width)
              (cl-incf width delta)
            (if (>= inner-width exwm--normal-hints-max-width)
                (setq width nil)
              (setq width (min (+ exwm--normal-hints-max-width margin)
                               (+ width delta)))))
        (if (not exwm--normal-hints-min-width)
            (cl-incf width delta)
          (if (<= inner-width exwm--normal-hints-min-width)
              (setq width nil)
            (setq width (max (+ exwm--normal-hints-min-width margin)
                             (+ width delta))))))
      (when (and width (> width 0))
        (setf (slot-value exwm--geometry 'width) width)
        (xcb:+request exwm--connection
            (make-instance 'xcb:ConfigureWindow
                           :window (frame-parameter exwm--floating-frame
                                                    'exwm-outer-id)
                           :value-mask xcb:ConfigWindow:Width
                           :width width))
        (xcb:+request exwm--connection
            (make-instance 'xcb:ConfigureWindow
                           :window (frame-parameter exwm--floating-frame
                                                    'exwm-container)
                           :value-mask xcb:ConfigWindow:Width
                           :width width))
        (xcb:flush exwm--connection))))
   (t
    (let* ((height (+ (frame-pixel-height) exwm-workspace--frame-y-offset))
           (edges (window-inside-pixel-edges))
           (inner-height (- (elt edges 3) (elt edges 1)))
           (margin (- height inner-height)))
      (if (> delta 0)
          (if (not exwm--normal-hints-max-height)
              (cl-incf height delta)
            (if (>= inner-height exwm--normal-hints-max-height)
                (setq height nil)
              (setq height (min (+ exwm--normal-hints-max-height margin)
                                (+ height delta)))))
        (if (not exwm--normal-hints-min-height)
            (cl-incf height delta)
          (if (<= inner-height exwm--normal-hints-min-height)
              (setq height nil)
            (setq height (max (+ exwm--normal-hints-min-height margin)
                              (+ height delta))))))
      (when (and height (> height 0))
        (setf (slot-value exwm--geometry 'height) height)
        (xcb:+request exwm--connection
            (make-instance 'xcb:ConfigureWindow
                           :window (frame-parameter exwm--floating-frame
                                                    'exwm-outer-id)
                           :value-mask xcb:ConfigWindow:Height
                           :height height))
        (xcb:+request exwm--connection
            (make-instance 'xcb:ConfigureWindow
                           :window (frame-parameter exwm--floating-frame
                                                    'exwm-container)
                           :value-mask xcb:ConfigWindow:Height
                           :height height))
        (xcb:flush exwm--connection))))))

;;;###autoload
(defun exwm-layout-enlarge-window-horizontally (delta)
  "Make the selected window DELTA pixels wider.

See also `exwm-layout-enlarge-window'."
  (interactive "p")
  (exwm--log "%s" delta)
  (exwm-layout-enlarge-window delta t))

;;;###autoload
(defun exwm-layout-shrink-window (delta)
  "Make the selected window DELTA pixels lower.

See also `exwm-layout-enlarge-window'."
  (interactive "p")
  (exwm--log "%s" delta)
  (exwm-layout-enlarge-window (- delta)))

;;;###autoload
(defun exwm-layout-shrink-window-horizontally (delta)
  "Make the selected window DELTA pixels narrower.

See also `exwm-layout-enlarge-window'."
  (interactive "p")
  (exwm--log "%s" delta)
  (exwm-layout-enlarge-window (- delta) t))

;;;###autoload
(defun exwm-layout-hide-mode-line ()
  "Hide mode-line."
  (interactive)
  (exwm--log)
  (when (and (derived-mode-p 'exwm-mode) mode-line-format)
    (let (mode-line-height)
      (when exwm--floating-frame
        (setq mode-line-height (window-mode-line-height
                                (frame-root-window exwm--floating-frame))))
      (setq exwm--mode-line-format mode-line-format
            mode-line-format nil)
      (if (not exwm--floating-frame)
          (exwm-layout--show exwm--id)
        (set-frame-height exwm--floating-frame
                          (- (frame-pixel-height exwm--floating-frame)
                             mode-line-height)
                          nil t)))))

;;;###autoload
(defun exwm-layout-show-mode-line ()
  "Show mode-line."
  (interactive)
  (exwm--log)
  (when (and (derived-mode-p 'exwm-mode) (not mode-line-format))
    (setq mode-line-format exwm--mode-line-format
          exwm--mode-line-format nil)
    (if (not exwm--floating-frame)
        (exwm-layout--show exwm--id)
      (set-frame-height exwm--floating-frame
                        (+ (frame-pixel-height exwm--floating-frame)
                           (window-mode-line-height (frame-root-window
                                                     exwm--floating-frame)))
                        nil t)
      (call-interactively #'exwm-input-grab-keyboard))
    (force-mode-line-update)))

;;;###autoload
(defun exwm-layout-toggle-mode-line ()
  "Toggle the display of mode-line."
  (interactive)
  (exwm--log)
  (when (derived-mode-p 'exwm-mode)
    (if mode-line-format
        (exwm-layout-hide-mode-line)
      (exwm-layout-show-mode-line))))

(defun exwm-layout--init ()
  "Initialize layout module."
  ;; Auto refresh layout
  (exwm--log)
  (add-hook 'window-configuration-change-hook #'exwm-layout--refresh)
  ;; The behavior of `window-configuration-change-hook' will be changed.
  (when (fboundp 'window-pixel-width-before-size-change)
    (add-hook 'window-size-change-functions #'exwm-layout--refresh))
  (unless (exwm-workspace--minibuffer-own-frame-p)
    ;; Refresh when minibuffer grows
    (add-hook 'minibuffer-setup-hook #'exwm-layout--on-minibuffer-setup t)
    (setq exwm-layout--timer
          (run-with-idle-timer 0 t #'exwm-layout--on-echo-area-change t))
    (add-hook 'echo-area-clear-hook #'exwm-layout--on-echo-area-change)))

(defun exwm-layout--exit ()
  "Exit the layout module."
  (exwm--log)
  (remove-hook 'window-configuration-change-hook #'exwm-layout--refresh)
  (when (fboundp 'window-pixel-width-before-size-change)
    (remove-hook 'window-size-change-functions #'exwm-layout--refresh))
  (remove-hook 'minibuffer-setup-hook #'exwm-layout--on-minibuffer-setup)
  (when exwm-layout--timer
    (cancel-timer exwm-layout--timer)
    (setq exwm-layout--timer nil))
  (remove-hook 'echo-area-clear-hook #'exwm-layout--on-echo-area-change))



(provide 'exwm-layout)

;;; exwm-layout.el ends here