This repository has been archived by the owner on Apr 18, 2023. It is now read-only.
/
floating.c
937 lines (779 loc) · 34.1 KB
/
floating.c
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
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* floating.c: Floating windows.
*
*/
#include "all.h"
#ifndef MAX
#define MAX(x, y) ((x) > (y) ? (x) : (y))
#endif
/*
* Calculates sum of heights and sum of widths of all currently active outputs
*
*/
static Rect total_outputs_dimensions(void) {
if (TAILQ_EMPTY(&outputs))
return (Rect){0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
Output *output;
/* Use Rect to encapsulate dimensions, ignoring x/y */
Rect outputs_dimensions = {0, 0, 0, 0};
TAILQ_FOREACH(output, &outputs, outputs) {
outputs_dimensions.height += output->rect.height;
outputs_dimensions.width += output->rect.width;
}
return outputs_dimensions;
}
/*
* Updates I3_FLOATING_WINDOW by either setting or removing it on the con and
* all its children.
*
*/
static void floating_set_hint_atom(Con *con, bool floating) {
if (!con_is_leaf(con)) {
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
floating_set_hint_atom(child, floating);
}
}
if (con->window == NULL) {
return;
}
if (floating) {
uint32_t val = 1;
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
A_I3_FLOATING_WINDOW, XCB_ATOM_CARDINAL, 32, 1, &val);
} else {
xcb_delete_property(conn, con->window->id, A_I3_FLOATING_WINDOW);
}
xcb_flush(conn);
}
/**
* Called when a floating window is created or resized.
* This function resizes the window if its size is higher or lower than the
* configured maximum/minimum size, respectively.
*
*/
void floating_check_size(Con *floating_con) {
/* Define reasonable minimal and maximal sizes for floating windows */
const int floating_sane_min_height = 50;
const int floating_sane_min_width = 75;
Rect floating_sane_max_dimensions;
Con *focused_con = con_descend_focused(floating_con);
Rect border_rect = con_border_style_rect(focused_con);
/* We have to do the opposite calculations that render_con() do
* to get the exact size we want. */
border_rect.width = -border_rect.width;
border_rect.width += 2 * focused_con->border_width;
border_rect.height = -border_rect.height;
border_rect.height += 2 * focused_con->border_width;
if (con_border_style(focused_con) == BS_NORMAL) {
border_rect.height += render_deco_height();
}
if (focused_con->window != NULL) {
if (focused_con->window->min_width) {
floating_con->rect.width -= border_rect.width;
floating_con->rect.width = max(floating_con->rect.width, focused_con->window->min_width);
floating_con->rect.width += border_rect.width;
}
if (focused_con->window->min_height) {
floating_con->rect.height -= border_rect.height;
floating_con->rect.height = max(floating_con->rect.height, focused_con->window->min_height);
floating_con->rect.height += border_rect.height;
}
if (focused_con->window->height_increment &&
floating_con->rect.height >= focused_con->window->base_height + border_rect.height) {
floating_con->rect.height -= focused_con->window->base_height + border_rect.height;
floating_con->rect.height -= floating_con->rect.height % focused_con->window->height_increment;
floating_con->rect.height += focused_con->window->base_height + border_rect.height;
}
if (focused_con->window->width_increment &&
floating_con->rect.width >= focused_con->window->base_width + border_rect.width) {
floating_con->rect.width -= focused_con->window->base_width + border_rect.width;
floating_con->rect.width -= floating_con->rect.width % focused_con->window->width_increment;
floating_con->rect.width += focused_con->window->base_width + border_rect.width;
}
}
/* Unless user requests otherwise (-1), raise the width/height to
* reasonable minimum dimensions */
if (config.floating_minimum_height != -1) {
floating_con->rect.height -= border_rect.height;
if (config.floating_minimum_height == 0) {
floating_con->rect.height = max(floating_con->rect.height, floating_sane_min_height);
} else {
floating_con->rect.height = max(floating_con->rect.height, config.floating_minimum_height);
}
floating_con->rect.height += border_rect.height;
}
if (config.floating_minimum_width != -1) {
floating_con->rect.width -= border_rect.width;
if (config.floating_minimum_width == 0) {
floating_con->rect.width = max(floating_con->rect.width, floating_sane_min_width);
} else {
floating_con->rect.width = max(floating_con->rect.width, config.floating_minimum_width);
}
floating_con->rect.width += border_rect.width;
}
/* Unless user requests otherwise (-1), ensure width/height do not exceed
* configured maxima or, if unconfigured, limit to combined width of all
* outputs */
floating_sane_max_dimensions = total_outputs_dimensions();
if (config.floating_maximum_height != -1) {
floating_con->rect.height -= border_rect.height;
if (config.floating_maximum_height == 0) {
floating_con->rect.height = min(floating_con->rect.height, floating_sane_max_dimensions.height);
} else {
floating_con->rect.height = min(floating_con->rect.height, config.floating_maximum_height);
}
floating_con->rect.height += border_rect.height;
}
if (config.floating_maximum_width != -1) {
floating_con->rect.width -= border_rect.width;
if (config.floating_maximum_width == 0) {
floating_con->rect.width = min(floating_con->rect.width, floating_sane_max_dimensions.width);
} else {
floating_con->rect.width = min(floating_con->rect.width, config.floating_maximum_width);
}
floating_con->rect.width += border_rect.width;
}
}
void floating_enable(Con *con, bool automatic) {
bool set_focus = (con == focused);
if (con_is_docked(con)) {
LOG("Container is a dock window, not enabling floating mode.\n");
return;
}
if (con_is_floating(con)) {
LOG("Container is already in floating mode, not doing anything.\n");
return;
}
if (con->type == CT_WORKSPACE) {
LOG("Container is a workspace, not enabling floating mode.\n");
return;
}
/* 1: detach the container from its parent */
/* TODO: refactor this with tree_close_internal() */
TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
con_fix_percent(con->parent);
/* 2: create a new container to render the decoration on, add
* it as a floating window to the workspace */
Con *nc = con_new(NULL, NULL);
/* we need to set the parent afterwards instead of passing it as an
* argument to con_new() because nc would be inserted into the tiling layer
* otherwise. */
Con *ws = con_get_workspace(con);
nc->parent = ws;
nc->type = CT_FLOATING_CON;
nc->layout = L_SPLITH;
/* We insert nc already, even though its rect is not yet calculated. This
* is necessary because otherwise the workspace might be empty (and get
* closed in tree_close_internal()) even though it’s not. */
if (set_focus) {
TAILQ_INSERT_TAIL(&(ws->floating_head), nc, floating_windows);
} else {
TAILQ_INSERT_HEAD(&(ws->floating_head), nc, floating_windows);
}
TAILQ_INSERT_TAIL(&(ws->focus_head), nc, focused);
/* check if the parent container is empty and close it if so */
if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) &&
con_num_children(con->parent) == 0) {
DLOG("Old container empty after setting this child to floating, closing\n");
Con *parent = con->parent;
/* clear the pointer before calling tree_close_internal in which the memory is freed */
con->parent = NULL;
tree_close_internal(parent, DONT_KILL_WINDOW, false, false);
}
char *name;
sasprintf(&name, "[i3 con] floatingcon around %p", con);
x_set_name(nc, name);
free(name);
/* find the height for the decorations */
int deco_height = render_deco_height();
DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
DLOG("Geometry = (%d, %d) with %d x %d\n", con->geometry.x, con->geometry.y, con->geometry.width, con->geometry.height);
Rect zero = {0, 0, 0, 0};
nc->rect = con->geometry;
/* If the geometry was not set (split containers), we need to determine a
* sensible one by combining the geometry of all children */
if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
DLOG("Geometry not set, combining children\n");
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
nc->rect.width += child->geometry.width;
nc->rect.height = max(nc->rect.height, child->geometry.height);
}
}
TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
/* 3: attach the child to the new parent container. We need to do this
* because con_border_style_rect() needs to access con->parent. */
con->parent = nc;
con->percent = 1.0;
con->floating = FLOATING_USER_ON;
/* 4: set the border style as specified with new_float */
if (automatic)
con->border_style = config.default_floating_border;
/* Add pixels for the decoration. */
Rect border_style_rect = con_border_style_rect(con);
nc->rect.height -= border_style_rect.height;
nc->rect.width -= border_style_rect.width;
/* Add some more pixels for the title bar */
if (con_border_style(con) == BS_NORMAL) {
nc->rect.height += deco_height;
}
/* Honor the X11 border */
nc->rect.height += con->border_width * 2;
nc->rect.width += con->border_width * 2;
floating_check_size(nc);
/* Some clients (like GIMP’s color picker window) get mapped
* to (0, 0), so we push them to a reasonable position
* (centered over their leader) */
if (nc->rect.x == 0 && nc->rect.y == 0) {
Con *leader;
if (con->window && con->window->leader != XCB_NONE &&
(leader = con_by_window_id(con->window->leader)) != NULL) {
DLOG("Centering above leader\n");
floating_center(nc, leader->rect);
} else {
/* center the window on workspace as fallback */
floating_center(nc, ws->rect);
}
}
/* Sanity check: Are the coordinates on the appropriate output? If not, we
* need to change them */
Output *current_output = get_output_containing(nc->rect.x +
(nc->rect.width / 2),
nc->rect.y + (nc->rect.height / 2));
Con *correct_output = con_get_output(ws);
if (!current_output || current_output->con != correct_output) {
DLOG("This floating window is on the wrong output, fixing coordinates (currently (%d, %d))\n",
nc->rect.x, nc->rect.y);
/* If moving from one output to another, keep the relative position
* consistent (e.g. a centered dialog will remain centered). */
if (current_output)
floating_fix_coordinates(nc, ¤t_output->con->rect, &correct_output->rect);
else {
nc->rect.x = correct_output->rect.x;
nc->rect.y = correct_output->rect.y;
}
}
DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
/* 5: Subtract the deco_height in order to make the floating window appear
* at precisely the position it specified in its original geometry (which
* is what applications might remember). */
deco_height = (con->border_style == BS_NORMAL ? render_deco_height() : 0);
nc->rect.y -= deco_height;
DLOG("Corrected y = %d (deco_height = %d)\n", nc->rect.y, deco_height);
/* render the cons to get initial window_rect correct */
render_con(nc, false);
render_con(con, false);
if (set_focus)
con_focus(con);
/* Check if we need to re-assign it to a different workspace because of its
* coordinates and exit if that was done successfully. */
if (floating_maybe_reassign_ws(nc)) {
goto done;
}
/* Sanitize coordinates: Check if they are on any output */
if (get_output_containing(nc->rect.x, nc->rect.y) != NULL) {
goto done;
}
ELOG("No output found at destination coordinates, centering floating window on current ws\n");
floating_center(nc, ws->rect);
done:
floating_set_hint_atom(nc, true);
ipc_send_window_event("floating", con);
}
void floating_disable(Con *con, bool automatic) {
if (!con_is_floating(con)) {
LOG("Container isn't floating, not doing anything.\n");
return;
}
const bool set_focus = (con == focused);
Con *ws = con_get_workspace(con);
Con *parent = con->parent;
/* 1: detach from parent container */
TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
/* 2: kill parent container */
TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
/* clear the pointer before calling tree_close_internal in which the memory is freed */
con->parent = NULL;
tree_close_internal(parent, DONT_KILL_WINDOW, true, false);
/* 3: re-attach to the parent of the currently focused con on the workspace
* this floating con was on */
Con *focused = con_descend_tiling_focused(ws);
/* if there is no other container on this workspace, focused will be the
* workspace itself */
if (focused->type == CT_WORKSPACE)
con->parent = focused;
else
con->parent = focused->parent;
/* con_fix_percent will adjust the percent value */
con->percent = 0.0;
con->floating = FLOATING_USER_OFF;
con_attach(con, con->parent, false);
con_fix_percent(con->parent);
if (set_focus)
con_focus(con);
floating_set_hint_atom(con, false);
ipc_send_window_event("floating", con);
}
/*
* Toggles floating mode for the given container.
*
* If the automatic flag is set to true, this was an automatic update by a change of the
* window class from the application which can be overwritten by the user.
*
*/
void toggle_floating_mode(Con *con, bool automatic) {
/* forbid the command to toggle floating on a CT_FLOATING_CON */
if (con->type == CT_FLOATING_CON) {
ELOG("Cannot toggle floating mode on con = %p because it is of type CT_FLOATING_CON.\n", con);
return;
}
/* see if the client is already floating */
if (con_is_floating(con)) {
LOG("already floating, re-setting to tiling\n");
floating_disable(con, automatic);
return;
}
floating_enable(con, automatic);
}
/*
* Raises the given container in the list of floating containers
*
*/
void floating_raise_con(Con *con) {
DLOG("Raising floating con %p / %s\n", con, con->name);
TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
}
/*
* Checks if con’s coordinates are within its workspace and re-assigns it to
* the actual workspace if not.
*
*/
bool floating_maybe_reassign_ws(Con *con) {
Output *output = get_output_containing(
con->rect.x + (con->rect.width / 2),
con->rect.y + (con->rect.height / 2));
if (!output) {
ELOG("No output found at destination coordinates?\n");
return false;
}
if (con_get_output(con) == output->con) {
DLOG("still the same ws\n");
return false;
}
DLOG("Need to re-assign!\n");
Con *content = output_get_content(output->con);
Con *ws = TAILQ_FIRST(&(content->focus_head));
DLOG("Moving con %p / %s to workspace %p / %s\n", con, con->name, ws, ws->name);
con_move_to_workspace(con, ws, false, true, false);
con_focus(con_descend_focused(con));
return true;
}
/*
* Centers a floating con above the specified rect.
*
*/
void floating_center(Con *con, Rect rect) {
con->rect.x = rect.x + (rect.width / 2) - (con->rect.width / 2);
con->rect.y = rect.y + (rect.height / 2) - (con->rect.height / 2);
}
/*
* Moves the given floating con to the current pointer position.
*
*/
void floating_move_to_pointer(Con *con) {
assert(con->type == CT_FLOATING_CON);
xcb_query_pointer_reply_t *reply = xcb_query_pointer_reply(conn, xcb_query_pointer(conn, root), NULL);
if (reply == NULL) {
ELOG("could not query pointer position, not moving this container\n");
return;
}
Output *output = get_output_containing(reply->root_x, reply->root_y);
if (output == NULL) {
ELOG("The pointer is not on any output, cannot move the container here.\n");
return;
}
/* Determine where to put the window. */
int32_t x = reply->root_x - con->rect.width / 2;
int32_t y = reply->root_y - con->rect.height / 2;
FREE(reply);
/* Correct target coordinates to be in-bounds. */
x = MAX(x, (int32_t)output->rect.x);
y = MAX(y, (int32_t)output->rect.y);
if (x + con->rect.width > output->rect.x + output->rect.width)
x = output->rect.x + output->rect.width - con->rect.width;
if (y + con->rect.height > output->rect.y + output->rect.height)
y = output->rect.y + output->rect.height - con->rect.height;
/* Update container's coordinates to position it correctly. */
floating_reposition(con, (Rect){x, y, con->rect.width, con->rect.height});
}
DRAGGING_CB(drag_window_callback) {
const struct xcb_button_press_event_t *event = extra;
/* Reposition the client correctly while moving */
con->rect.x = old_rect->x + (new_x - event->root_x);
con->rect.y = old_rect->y + (new_y - event->root_y);
render_con(con, false);
x_push_node(con);
xcb_flush(conn);
/* Check if we cross workspace boundaries while moving */
if (!floating_maybe_reassign_ws(con))
return;
/* Ensure not to warp the pointer while dragging */
x_set_warp_to(NULL);
tree_render();
}
/*
* Called when the user clicked on the titlebar of a floating window.
* Calls the drag_pointer function with the drag_window callback
*
*/
void floating_drag_window(Con *con, const xcb_button_press_event_t *event) {
DLOG("floating_drag_window\n");
/* Push changes before dragging, so that the window gets raised now and not
* after the user releases the mouse button */
tree_render();
/* Store the initial rect in case of user revert/cancel */
Rect initial_rect = con->rect;
/* Drag the window */
drag_result_t drag_result = drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, XCURSOR_CURSOR_MOVE, drag_window_callback, event);
if (!con_exists(con)) {
DLOG("The container has been closed in the meantime.\n");
return;
}
/* If the user cancelled, undo the changes. */
if (drag_result == DRAG_REVERT)
floating_reposition(con, initial_rect);
/* If this is a scratchpad window, don't auto center it from now on. */
if (con->scratchpad_state == SCRATCHPAD_FRESH)
con->scratchpad_state = SCRATCHPAD_CHANGED;
tree_render();
}
/*
* This is an ugly data structure which we need because there is no standard
* way of having nested functions (only available as a gcc extension at the
* moment, clang doesn’t support it) or blocks (only available as a clang
* extension and only on Mac OS X systems at the moment).
*
*/
struct resize_window_callback_params {
const border_t corner;
const bool proportional;
const xcb_button_press_event_t *event;
};
DRAGGING_CB(resize_window_callback) {
const struct resize_window_callback_params *params = extra;
const xcb_button_press_event_t *event = params->event;
border_t corner = params->corner;
int32_t dest_x = con->rect.x;
int32_t dest_y = con->rect.y;
uint32_t dest_width;
uint32_t dest_height;
double ratio = (double)old_rect->width / old_rect->height;
/* First guess: We resize by exactly the amount the mouse moved,
* taking into account in which corner the client was grabbed */
if (corner & BORDER_LEFT)
dest_width = old_rect->width - (new_x - event->root_x);
else
dest_width = old_rect->width + (new_x - event->root_x);
if (corner & BORDER_TOP)
dest_height = old_rect->height - (new_y - event->root_y);
else
dest_height = old_rect->height + (new_y - event->root_y);
/* User wants to keep proportions, so we may have to adjust our values */
if (params->proportional) {
dest_width = max(dest_width, (int)(dest_height * ratio));
dest_height = max(dest_height, (int)(dest_width / ratio));
}
con->rect = (Rect){dest_x, dest_y, dest_width, dest_height};
/* Obey window size */
floating_check_size(con);
/* If not the lower right corner is grabbed, we must also reposition
* the client by exactly the amount we resized it */
if (corner & BORDER_LEFT)
dest_x = old_rect->x + (old_rect->width - con->rect.width);
if (corner & BORDER_TOP)
dest_y = old_rect->y + (old_rect->height - con->rect.height);
con->rect.x = dest_x;
con->rect.y = dest_y;
/* TODO: don’t re-render the whole tree just because we change
* coordinates of a floating window */
tree_render();
x_push_changes(croot);
}
/*
* Called when the user clicked on a floating window while holding the
* floating_modifier and the right mouse button.
* Calls the drag_pointer function with the resize_window callback
*
*/
void floating_resize_window(Con *con, const bool proportional,
const xcb_button_press_event_t *event) {
DLOG("floating_resize_window\n");
/* corner saves the nearest corner to the original click. It contains
* a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
border_t corner = 0;
if (event->event_x <= (int16_t)(con->rect.width / 2))
corner |= BORDER_LEFT;
else
corner |= BORDER_RIGHT;
int cursor = 0;
if (event->event_y <= (int16_t)(con->rect.height / 2)) {
corner |= BORDER_TOP;
cursor = (corner & BORDER_LEFT) ? XCURSOR_CURSOR_TOP_LEFT_CORNER : XCURSOR_CURSOR_TOP_RIGHT_CORNER;
} else {
corner |= BORDER_BOTTOM;
cursor = (corner & BORDER_LEFT) ? XCURSOR_CURSOR_BOTTOM_LEFT_CORNER : XCURSOR_CURSOR_BOTTOM_RIGHT_CORNER;
}
struct resize_window_callback_params params = {corner, proportional, event};
/* get the initial rect in case of revert/cancel */
Rect initial_rect = con->rect;
drag_result_t drag_result = drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, cursor, resize_window_callback, ¶ms);
if (!con_exists(con)) {
DLOG("The container has been closed in the meantime.\n");
return;
}
/* If the user cancels, undo the resize */
if (drag_result == DRAG_REVERT)
floating_reposition(con, initial_rect);
/* If this is a scratchpad window, don't auto center it from now on. */
if (con->scratchpad_state == SCRATCHPAD_FRESH)
con->scratchpad_state = SCRATCHPAD_CHANGED;
}
/* Custom data structure used to track dragging-related events. */
struct drag_x11_cb {
ev_check check;
/* Whether this modal event loop should be exited and with which result. */
drag_result_t result;
/* The container that is being dragged or resized, or NULL if this is a
* drag of the resize handle. */
Con *con;
/* The dimensions of con when the loop was started. */
Rect old_rect;
/* The callback to invoke after every pointer movement. */
callback_t callback;
/* User data pointer for callback. */
const void *extra;
};
static void xcb_drag_check_cb(EV_P_ ev_check *w, int revents) {
struct drag_x11_cb *dragloop = (struct drag_x11_cb *)w->data;
xcb_motion_notify_event_t *last_motion_notify = NULL;
xcb_generic_event_t *event;
while ((event = xcb_poll_for_event(conn)) != NULL) {
if (event->response_type == 0) {
xcb_generic_error_t *error = (xcb_generic_error_t *)event;
DLOG("X11 Error received (probably harmless)! sequence 0x%x, error_code = %d\n",
error->sequence, error->error_code);
free(event);
continue;
}
/* Strip off the highest bit (set if the event is generated) */
int type = (event->response_type & 0x7F);
switch (type) {
case XCB_BUTTON_RELEASE:
dragloop->result = DRAG_SUCCESS;
break;
case XCB_KEY_PRESS:
DLOG("A key was pressed during drag, reverting changes.\n");
dragloop->result = DRAG_REVERT;
handle_event(type, event);
break;
case XCB_UNMAP_NOTIFY: {
xcb_unmap_notify_event_t *unmap_event = (xcb_unmap_notify_event_t *)event;
Con *con = con_by_window_id(unmap_event->window);
if (con != NULL) {
DLOG("UnmapNotify for window 0x%08x (container %p)\n", unmap_event->window, con);
if (con_get_workspace(con) == con_get_workspace(focused)) {
DLOG("UnmapNotify for a managed window on the current workspace, aborting\n");
dragloop->result = DRAG_ABORT;
}
}
handle_event(type, event);
break;
}
case XCB_MOTION_NOTIFY:
/* motion_notify events are saved for later */
FREE(last_motion_notify);
last_motion_notify = (xcb_motion_notify_event_t *)event;
break;
default:
DLOG("Passing to original handler\n");
handle_event(type, event);
break;
}
if (last_motion_notify != (xcb_motion_notify_event_t *)event)
free(event);
if (dragloop->result != DRAGGING)
return;
}
if (last_motion_notify == NULL)
return;
/* Ensure that we are either dragging the resize handle (con is NULL) or that the
* container still exists. The latter might not be true, e.g., if the window closed
* for any reason while the user was dragging it. */
if (!dragloop->con || con_exists(dragloop->con)) {
dragloop->callback(
dragloop->con,
&(dragloop->old_rect),
last_motion_notify->root_x,
last_motion_notify->root_y,
dragloop->extra);
}
free(last_motion_notify);
}
/*
* This function grabs your pointer and keyboard and lets you drag stuff around
* (borders). Every time you move your mouse, an XCB_MOTION_NOTIFY event will
* be received and the given callback will be called with the parameters
* specified (client, border on which the click originally was), the original
* rect of the client, the event and the new coordinates (x, y).
*
*/
drag_result_t drag_pointer(Con *con, const xcb_button_press_event_t *event, xcb_window_t
confine_to,
border_t border, int cursor, callback_t callback, const void *extra) {
xcb_cursor_t xcursor = (cursor && xcursor_supported) ? xcursor_get_cursor(cursor) : XCB_NONE;
/* Grab the pointer */
xcb_grab_pointer_cookie_t cookie;
xcb_grab_pointer_reply_t *reply;
xcb_generic_error_t *error;
cookie = xcb_grab_pointer(conn,
false, /* get all pointer events specified by the following mask */
root, /* grab the root window */
XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
XCB_GRAB_MODE_ASYNC, /* keyboard mode */
confine_to, /* confine_to = in which window should the cursor stay */
xcursor, /* possibly display a special cursor */
XCB_CURRENT_TIME);
if ((reply = xcb_grab_pointer_reply(conn, cookie, &error)) == NULL) {
ELOG("Could not grab pointer (error_code = %d)\n", error->error_code);
free(error);
return DRAG_ABORT;
}
free(reply);
/* Grab the keyboard */
xcb_grab_keyboard_cookie_t keyb_cookie;
xcb_grab_keyboard_reply_t *keyb_reply;
keyb_cookie = xcb_grab_keyboard(conn,
false, /* get all keyboard events */
root, /* grab the root window */
XCB_CURRENT_TIME,
XCB_GRAB_MODE_ASYNC, /* continue processing pointer events as normal */
XCB_GRAB_MODE_ASYNC /* keyboard mode */
);
if ((keyb_reply = xcb_grab_keyboard_reply(conn, keyb_cookie, &error)) == NULL) {
ELOG("Could not grab keyboard (error_code = %d)\n", error->error_code);
free(error);
xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
return DRAG_ABORT;
}
free(keyb_reply);
/* Go into our own event loop */
struct drag_x11_cb loop = {
.result = DRAGGING,
.con = con,
.callback = callback,
.extra = extra,
};
ev_check *check = &loop.check;
if (con)
loop.old_rect = con->rect;
ev_check_init(check, xcb_drag_check_cb);
check->data = &loop;
main_set_x11_cb(false);
ev_check_start(main_loop, check);
while (loop.result == DRAGGING)
ev_run(main_loop, EVRUN_ONCE);
ev_check_stop(main_loop, check);
main_set_x11_cb(true);
xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
xcb_flush(conn);
return loop.result;
}
/*
* Repositions the CT_FLOATING_CON to have the coordinates specified by
* newrect, but only if the coordinates are not out-of-bounds. Also reassigns
* the floating con to a different workspace if this move was across different
* outputs.
*
*/
void floating_reposition(Con *con, Rect newrect) {
/* Sanity check: Are the new coordinates on any output? If not, we
* ignore that request. */
if (!contained_by_output(newrect)) {
ELOG("No output found at destination coordinates. Not repositioning.\n");
return;
}
con->rect = newrect;
floating_maybe_reassign_ws(con);
/* If this is a scratchpad window, don't auto center it from now on. */
if (con->scratchpad_state == SCRATCHPAD_FRESH)
con->scratchpad_state = SCRATCHPAD_CHANGED;
tree_render();
}
/*
* Sets size of the CT_FLOATING_CON to specified dimensions. Might limit the
* actual size with regard to size constraints taken from user settings.
* Additionally, the dimensions may be upscaled until they're divisible by the
* window's size hints.
*
*/
void floating_resize(Con *floating_con, int x, int y) {
DLOG("floating resize to %dx%d px\n", x, y);
Rect *rect = &floating_con->rect;
Con *focused_con = con_descend_focused(floating_con);
if (focused_con->window == NULL) {
DLOG("No window is focused. Not resizing.\n");
return;
}
int wi = focused_con->window->width_increment;
int hi = focused_con->window->height_increment;
rect->width = x;
rect->height = y;
if (wi)
rect->width += (wi - 1 - rect->width) % wi;
if (hi)
rect->height += (hi - 1 - rect->height) % hi;
floating_check_size(floating_con);
/* If this is a scratchpad window, don't auto center it from now on. */
if (floating_con->scratchpad_state == SCRATCHPAD_FRESH)
floating_con->scratchpad_state = SCRATCHPAD_CHANGED;
}
/*
* Fixes the coordinates of the floating window whenever the window gets
* reassigned to a different output (or when the output’s rect changes).
*
*/
void floating_fix_coordinates(Con *con, Rect *old_rect, Rect *new_rect) {
DLOG("Fixing coordinates of floating window %p (rect (%d, %d), %d x %d)\n",
con, con->rect.x, con->rect.y, con->rect.width, con->rect.height);
DLOG("old_rect = (%d, %d), %d x %d\n",
old_rect->x, old_rect->y, old_rect->width, old_rect->height);
DLOG("new_rect = (%d, %d), %d x %d\n",
new_rect->x, new_rect->y, new_rect->width, new_rect->height);
/* First we get the x/y coordinates relative to the x/y coordinates
* of the output on which the window is on */
int32_t rel_x = con->rect.x - old_rect->x + (int32_t)(con->rect.width / 2);
int32_t rel_y = con->rect.y - old_rect->y + (int32_t)(con->rect.height / 2);
/* Then we calculate a fraction, for example 0.63 for a window
* which is at y = 1212 of a 1920 px high output */
DLOG("rel_x = %d, rel_y = %d, fraction_x = %f, fraction_y = %f, output->w = %d, output->h = %d\n",
rel_x, rel_y, (double)rel_x / old_rect->width, (double)rel_y / old_rect->height,
old_rect->width, old_rect->height);
/* Here we have to multiply at first. Or we will lose precision when not compiled with -msse2 */
con->rect.x = (int32_t)new_rect->x + (double)(rel_x * (int32_t)new_rect->width) / (int32_t)old_rect->width - (int32_t)(con->rect.width / 2);
con->rect.y = (int32_t)new_rect->y + (double)(rel_y * (int32_t)new_rect->height) / (int32_t)old_rect->height - (int32_t)(con->rect.height / 2);
DLOG("Resulting coordinates: x = %d, y = %d\n", con->rect.x, con->rect.y);
}