src/window.c

   1 /* Copyright (c) 2012, Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright notice, this
   8  *    list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright notice,
  10  *    this list of conditions and the following disclaimer in the documentation
  11  *    and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <stdbool.h>
  28 #include <string.h>
  29 #include <xcb/shape.h>
  30 #include "bspwm.h"
  31 #include "ewmh.h"
  32 #include "monitor.h"
  33 #include "query.h"
  34 #include "rule.h"
  35 #include "settings.h"
  36 #include "geometry.h"
  37 #include "pointer.h"
  38 #include "stack.h"
  39 #include "tree.h"
  40 #include "parse.h"
  41 #include "window.h"
  42
  43 void schedule_window(xcb_window_t win)
  44 {
  45         coordinates_t loc;
  46         uint8_t override_redirect = 0;
  47         xcb_get_window_attributes_reply_t *wa = xcb_get_window_attributes_reply(dpy, xcb_get_window_attributes(dpy, win), NULL);
  48
  49         if (wa != NULL) {
  50                 override_redirect = wa->override_redirect;
  51                 free(wa);
  52         }
  53
  54         if (override_redirect || locate_window(win, &loc)) {
  55                 return;
  56         }
  57
  58         /* ignore pending windows */
  59         for (pending_rule_t *pr = pending_rule_head; pr != NULL; pr = pr->next) {
  60                 if (pr->win == win) {
  61                         return;
  62                 }
  63         }
  64
  65         rule_consequence_t *csq = make_rule_conquence();
  66         apply_rules(win, csq);
  67         if (!schedule_rules(win, csq)) {
  68                 manage_window(win, csq, -1);
  69                 free(csq);
  70         }
  71 }
  72
  73 bool manage_window(xcb_window_t win, rule_consequence_t *csq, int fd)
  74 {
  75         monitor_t *m = mon;
  76         desktop_t *d = mon->desk;
  77         node_t *f = mon->desk->focus;
  78
  79         parse_rule_consequence(fd, csq);
  80
  81         if (!ignore_ewmh_struts && ewmh_handle_struts(win)) {
  82                 for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  83                         arrange(m, m->desk);
  84                 }
  85         }
  86
  87         if (!csq->manage) {
  88                 free(csq->layer);
  89                 free(csq->state);
  90                 window_show(win);
  91                 return false;
  92         }
  93
  94         if (csq->node_desc[0] != '\0') {
  95                 coordinates_t ref = {m, d, f};
  96                 coordinates_t trg = {NULL, NULL, NULL};
  97                 if (node_from_desc(csq->node_desc, &ref, &trg) == SELECTOR_OK) {
  98                         m = trg.monitor;
  99                         d = trg.desktop;
 100                         f = trg.node;
 101                 }
 102         } else if (csq->desktop_desc[0] != '\0') {
 103                 coordinates_t ref = {m, d, NULL};
 104                 coordinates_t trg = {NULL, NULL, NULL};
 105                 if (desktop_from_desc(csq->desktop_desc, &ref, &trg) == SELECTOR_OK) {
 106                         m = trg.monitor;
 107                         d = trg.desktop;
 108                         f = trg.desktop->focus;
 109                 }
 110         } else if (csq->monitor_desc[0] != '\0') {
 111                 coordinates_t ref = {m, NULL, NULL};
 112                 coordinates_t trg = {NULL, NULL, NULL};
 113                 if (monitor_from_desc(csq->monitor_desc, &ref, &trg) == SELECTOR_OK) {
 114                         m = trg.monitor;
 115                         d = trg.monitor->desk;
 116                         f = trg.monitor->desk->focus;
 117                 }
 118         }
 119
 120         if (csq->sticky) {
 121                 m = mon;
 122                 d = mon->desk;
 123                 f = mon->desk->focus;
 124         }
 125
 126         if (csq->split_dir[0] != '\0' && f != NULL) {
 127                 direction_t dir;
 128                 if (parse_direction(csq->split_dir, &dir)) {
 129                         presel_dir(m, d, f, dir);
 130                 }
 131         }
 132
 133         if (csq->split_ratio != 0 && f != NULL) {
 134                 presel_ratio(m, d, f, csq->split_ratio);
 135         }
 136
 137         node_t *n = make_node(win);
 138         client_t *c = make_client();
 139         c->border_width = csq->border ? d->border_width : 0;
 140         n->client = c;
 141         initialize_client(n);
 142         initialize_floating_rectangle(n);
 143
 144         if (csq->rect != NULL) {
 145                 c->floating_rectangle = *csq->rect;
 146                 free(csq->rect);
 147         } else if (c->floating_rectangle.x == 0 && c->floating_rectangle.y == 0) {
 148                 csq->center = true;
 149         }
 150
 151         monitor_t *mm = monitor_from_client(c);
 152         embrace_client(mm, c);
 153         adapt_geometry(&mm->rectangle, &m->rectangle, n);
 154
 155         if (csq->center) {
 156                 window_center(m, c);
 157         }
 158
 159         snprintf(c->class_name, sizeof(c->class_name), "%s", csq->class_name);
 160         snprintf(c->instance_name, sizeof(c->instance_name), "%s", csq->instance_name);
 161
 162         if ((csq->state != NULL && (*(csq->state) == STATE_FLOATING || *(csq->state) == STATE_FULLSCREEN)) || csq->hidden) {
 163                 n->vacant = true;
 164         }
 165
 166         f = insert_node(m, d, n, f);
 167         clients_count++;
 168
 169         n->vacant = false;
 170
 171         put_status(SBSC_MASK_NODE_ADD, "node_add 0x%08X 0x%08X 0x%08X 0x%08X\n", m->id, d->id, f!=NULL?f->id:0, win);
 172
 173         if (f != NULL && f->client != NULL && csq->state != NULL && *(csq->state) == STATE_FLOATING) {
 174                 c->layer = f->client->layer;
 175         }
 176
 177         if (csq->layer != NULL) {
 178                 c->layer = *(csq->layer);
 179         }
 180
 181         if (csq->state != NULL) {
 182                 set_state(m, d, n, *(csq->state));
 183         }
 184
 185         set_hidden(m, d, n, csq->hidden);
 186         set_sticky(m, d, n, csq->sticky);
 187         set_private(m, d, n, csq->private);
 188         set_locked(m, d, n, csq->locked);
 189         set_marked(m, d, n, csq->marked);
 190
 191         arrange(m, d);
 192
 193         uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
 194         xcb_change_window_attributes(dpy, win, XCB_CW_EVENT_MASK, values);
 195         set_window_state(win, XCB_ICCCM_WM_STATE_NORMAL);
 196         window_grab_buttons(win);
 197
 198         if (d == m->desk) {
 199                 show_node(d, n);
 200         } else {
 201                 hide_node(d, n);
 202         }
 203
 204         if (!csq->hidden && csq->focus) {
 205                 if (d == mon->desk || csq->follow) {
 206                         focus_node(m, d, n);
 207                 } else {
 208                         activate_node(m, d, n);
 209                 }
 210         } else {
 211                 stack(d, n, false);
 212                 draw_border(n, false, (m == mon));
 213         }
 214
 215         ewmh_set_wm_desktop(n, d);
 216         ewmh_update_client_list(false);
 217         free(csq->layer);
 218         free(csq->state);
 219
 220         return true;
 221 }
 222
 223 void set_window_state(xcb_window_t win, xcb_icccm_wm_state_t state)
 224 {
 225         long data[] = {state, XCB_NONE};
 226         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, WM_STATE, WM_STATE, 32, 2, data);
 227 }
 228
 229 void unmanage_window(xcb_window_t win)
 230 {
 231         coordinates_t loc;
 232         if (locate_window(win, &loc)) {
 233                 put_status(SBSC_MASK_NODE_REMOVE, "node_remove 0x%08X 0x%08X 0x%08X\n", loc.monitor->id, loc.desktop->id, win);
 234                 remove_node(loc.monitor, loc.desktop, loc.node);
 235                 arrange(loc.monitor, loc.desktop);
 236         } else {
 237                 for (pending_rule_t *pr = pending_rule_head; pr != NULL; pr = pr->next) {
 238                         if (pr->win == win) {
 239                                 remove_pending_rule(pr);
 240                                 return;
 241                         }
 242                 }
 243         }
 244 }
 245
 246 bool is_presel_window(xcb_window_t win)
 247 {
 248         xcb_icccm_get_wm_class_reply_t reply;
 249         bool ret = false;
 250         if (xcb_icccm_get_wm_class_reply(dpy, xcb_icccm_get_wm_class(dpy, win), &reply, NULL) == 1) {
 251                 if (streq(BSPWM_CLASS_NAME, reply.class_name) && streq(PRESEL_FEEDBACK_I, reply.instance_name)) {
 252                         ret = true;
 253                 }
 254                 xcb_icccm_get_wm_class_reply_wipe(&reply);
 255         }
 256         return ret;
 257 }
 258
 259 void initialize_presel_feedback(node_t *n)
 260 {
 261         if (n == NULL || n->presel == NULL || n->presel->feedback != XCB_NONE) {
 262                 return;
 263         }
 264
 265         xcb_window_t win = xcb_generate_id(dpy);
 266         uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_SAVE_UNDER;
 267         uint32_t values[] = {get_color_pixel(presel_feedback_color), 1};
 268         xcb_create_window(dpy, XCB_COPY_FROM_PARENT, win, root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 269                                   XCB_COPY_FROM_PARENT, mask, values);
 270
 271         xcb_icccm_set_wm_class(dpy, win, sizeof(PRESEL_FEEDBACK_IC), PRESEL_FEEDBACK_IC);
 272         /* Make presel window's input shape NULL to pass any input to window below */
 273         xcb_shape_rectangles(dpy, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_CLIP_ORDERING_UNSORTED, win, 0, 0, 0, NULL);
 274         stacking_list_t *s = stack_tail;
 275         while (s != NULL && !IS_TILED(s->node->client)) {
 276                 s = s->prev;
 277         }
 278         if (s != NULL) {
 279                 window_above(win, s->node->id);
 280         }
 281         n->presel->feedback = win;
 282 }
 283
 284 void draw_presel_feedback(monitor_t *m, desktop_t *d, node_t *n)
 285 {
 286         if (n == NULL || n->presel == NULL || d->layout == LAYOUT_MONOCLE) {
 287                 return;
 288         }
 289
 290         bool exists = (n->presel->feedback != XCB_NONE);
 291         if (!exists) {
 292                 initialize_presel_feedback(n);
 293         }
 294
 295         int gap = gapless_monocle && IS_MONOCLE(d) ? 0 : d->window_gap;
 296         presel_t *p = n->presel;
 297         xcb_rectangle_t rect = n->rectangle;
 298         rect.x = rect.y = 0;
 299         rect.width -= gap;
 300         rect.height -= gap;
 301         xcb_rectangle_t presel_rect = rect;
 302
 303         switch (p->split_dir) {
 304                 case DIR_NORTH:
 305                         presel_rect.height = p->split_ratio * rect.height;
 306                         break;
 307                 case DIR_EAST:
 308                         presel_rect.width = (1 - p->split_ratio) * rect.width;
 309                         presel_rect.x = rect.width - presel_rect.width;
 310                         break;
 311                 case DIR_SOUTH:
 312                         presel_rect.height = (1 - p->split_ratio) * rect.height;
 313                         presel_rect.y = rect.height - presel_rect.height;
 314                         break;
 315                 case DIR_WEST:
 316                         presel_rect.width = p->split_ratio * rect.width;
 317                         break;
 318         }
 319
 320         window_move_resize(p->feedback, n->rectangle.x + presel_rect.x, n->rectangle.y + presel_rect.y,
 321                            presel_rect.width, presel_rect.height);
 322
 323         if (!exists && m->desk == d) {
 324                 window_show(p->feedback);
 325         }
 326 }
 327
 328 void refresh_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 329 {
 330         if (n == NULL) {
 331                 return;
 332         } else {
 333                 if (n->presel != NULL) {
 334                         draw_presel_feedback(m, d, n);
 335                 }
 336                 refresh_presel_feedbacks(m, d, n->first_child);
 337                 refresh_presel_feedbacks(m, d, n->second_child);
 338         }
 339 }
 340
 341 void show_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 342 {
 343         if (n == NULL) {
 344                 return;
 345         } else {
 346                 if (n->presel != NULL) {
 347                         window_show(n->presel->feedback);
 348                 }
 349                 show_presel_feedbacks(m, d, n->first_child);
 350                 show_presel_feedbacks(m, d, n->second_child);
 351         }
 352 }
 353
 354 void hide_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 355 {
 356         if (n == NULL) {
 357                 return;
 358         } else {
 359                 if (n->presel != NULL) {
 360                         window_hide(n->presel->feedback);
 361                 }
 362                 hide_presel_feedbacks(m, d, n->first_child);
 363                 hide_presel_feedbacks(m, d, n->second_child);
 364         }
 365 }
 366
 367 void update_colors(void)
 368 {
 369         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 370                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 371                         update_colors_in(d->root, d, m);
 372                 }
 373         }
 374 }
 375
 376 void update_colors_in(node_t *n, desktop_t *d, monitor_t *m)
 377 {
 378         if (n == NULL) {
 379                 return;
 380         } else {
 381                 if (n->presel != NULL) {
 382                         uint32_t pxl = get_color_pixel(presel_feedback_color);
 383                         xcb_change_window_attributes(dpy, n->presel->feedback, XCB_CW_BACK_PIXEL, &pxl);
 384                         if (d == m->desk) {
 385                                 /* hack to induce back pixel refresh */
 386                                 window_hide(n->presel->feedback);
 387                                 window_show(n->presel->feedback);
 388                         }
 389                 }
 390                 if (n == d->focus) {
 391                         draw_border(n, true, (m == mon));
 392                 } else if (n->client != NULL) {
 393                         draw_border(n, false, (m == mon));
 394                 } else {
 395                         update_colors_in(n->first_child, d, m);
 396                         update_colors_in(n->second_child, d, m);
 397                 }
 398         }
 399 }
 400
 401 void draw_border(node_t *n, bool focused_node, bool focused_monitor)
 402 {
 403         if (n == NULL) {
 404                 return;
 405         }
 406
 407         uint32_t border_color_pxl = get_border_color(focused_node, focused_monitor);
 408         for (node_t *f = first_extrema(n); f != NULL; f = next_leaf(f, n)) {
 409                 if (f->client != NULL) {
 410                         window_draw_border(f->id, border_color_pxl);
 411                 }
 412         }
 413 }
 414
 415 void window_draw_border(xcb_window_t win, uint32_t border_color_pxl)
 416 {
 417         xcb_change_window_attributes(dpy, win, XCB_CW_BORDER_PIXEL, &border_color_pxl);
 418 }
 419
 420 void adopt_orphans(void)
 421 {
 422         xcb_query_tree_reply_t *qtr = xcb_query_tree_reply(dpy, xcb_query_tree(dpy, root), NULL);
 423         if (qtr == NULL) {
 424                 return;
 425         }
 426
 427         int len = xcb_query_tree_children_length(qtr);
 428         xcb_window_t *wins = xcb_query_tree_children(qtr);
 429
 430         for (int i = 0; i < len; i++) {
 431                 uint32_t idx;
 432                 xcb_window_t win = wins[i];
 433                 if (xcb_ewmh_get_wm_desktop_reply(ewmh, xcb_ewmh_get_wm_desktop(ewmh, win), &idx, NULL) == 1) {
 434                         schedule_window(win);
 435                 }
 436         }
 437
 438         free(qtr);
 439 }
 440
 441 uint32_t get_border_color(bool focused_node, bool focused_monitor)
 442 {
 443         if (focused_monitor && focused_node) {
 444                 return get_color_pixel(focused_border_color);
 445         } else if (focused_node) {
 446                 return get_color_pixel(active_border_color);
 447         } else {
 448                 return get_color_pixel(normal_border_color);
 449         }
 450 }
 451
 452 void initialize_floating_rectangle(node_t *n)
 453 {
 454         client_t *c = n->client;
 455
 456         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 457
 458         if (geo != NULL) {
 459                 c->floating_rectangle = (xcb_rectangle_t) {geo->x, geo->y, geo->width, geo->height};
 460         }
 461
 462         free(geo);
 463 }
 464
 465 xcb_rectangle_t get_window_rectangle(node_t *n)
 466 {
 467         client_t *c = n->client;
 468         if (c != NULL) {
 469                 xcb_get_geometry_reply_t *g = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 470                 if (g != NULL) {
 471                         xcb_rectangle_t rect = (xcb_rectangle_t) {g->x, g->y, g->width, g->height};
 472                         free(g);
 473                         return rect;
 474                 }
 475         }
 476         return (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 477 }
 478
 479 bool move_client(coordinates_t *loc, int dx, int dy)
 480 {
 481         node_t *n = loc->node;
 482
 483         if (n == NULL || n->client == NULL) {
 484                 return false;
 485         }
 486
 487         monitor_t *pm = NULL;
 488
 489         if (IS_TILED(n->client)) {
 490                 if (!grabbing) {
 491                         return false;
 492                 }
 493                 xcb_window_t pwin = XCB_NONE;
 494                 query_pointer(&pwin, NULL);
 495                 if (pwin == n->id) {
 496                         return false;
 497                 }
 498                 coordinates_t dst;
 499                 bool is_managed = (pwin != XCB_NONE && locate_window(pwin, &dst));
 500                 if (is_managed && dst.monitor == loc->monitor && IS_TILED(dst.node->client)) {
 501                         swap_nodes(loc->monitor, loc->desktop, n, loc->monitor, loc->desktop, dst.node, false);
 502                         return true;
 503                 } else {
 504                         if (is_managed && dst.monitor == loc->monitor) {
 505                                 return false;
 506                         } else {
 507                                 xcb_point_t pt = {0, 0};
 508                                 query_pointer(NULL, &pt);
 509                                 pm = monitor_from_point(pt);
 510                         }
 511                 }
 512         } else {
 513                 client_t *c = n->client;
 514                 xcb_rectangle_t rect = c->floating_rectangle;
 515                 int16_t x = rect.x + dx;
 516                 int16_t y = rect.y + dy;
 517
 518                 window_move(n->id, x, y);
 519
 520                 c->floating_rectangle.x = x;
 521                 c->floating_rectangle.y = y;
 522                 if (!grabbing) {
 523                         put_status(SBSC_MASK_NODE_GEOMETRY, "node_geometry 0x%08X 0x%08X 0x%08X %ux%u+%i+%i\n", loc->monitor->id, loc->desktop->id, loc->node->id, rect.width, rect.height, x, y);
 524                 }
 525                 pm = monitor_from_client(c);
 526         }
 527
 528         if (pm == NULL || pm == loc->monitor) {
 529                 return true;
 530         }
 531
 532         transfer_node(loc->monitor, loc->desktop, n, pm, pm->desk, pm->desk->focus, true);
 533         loc->monitor = pm;
 534         loc->desktop = pm->desk;
 535
 536         return true;
 537 }
 538
 539 bool resize_client(coordinates_t *loc, resize_handle_t rh, int dx, int dy, bool relative)
 540 {
 541         node_t *n = loc->node;
 542         if (n == NULL || n->client == NULL || n->client->state == STATE_FULLSCREEN) {
 543                 return false;
 544         }
 545         node_t *horizontal_fence = NULL, *vertical_fence = NULL;
 546         xcb_rectangle_t rect = get_rectangle(NULL, NULL, n);
 547         uint16_t width = rect.width, height = rect.height;
 548         int16_t x = rect.x, y = rect.y;
 549         if (n->client->state == STATE_TILED) {
 550                 if (rh & HANDLE_LEFT) {
 551                         vertical_fence = find_fence(n, DIR_WEST);
 552                 } else if (rh & HANDLE_RIGHT) {
 553                         vertical_fence = find_fence(n, DIR_EAST);
 554                 }
 555                 if (rh & HANDLE_TOP) {
 556                         horizontal_fence = find_fence(n, DIR_NORTH);
 557                 } else if (rh & HANDLE_BOTTOM) {
 558                         horizontal_fence = find_fence(n, DIR_SOUTH);
 559                 }
 560                 if (vertical_fence == NULL && horizontal_fence == NULL) {
 561                         return false;
 562                 }
 563                 if (vertical_fence != NULL) {
 564                         double sr = 0.0;
 565                         if (relative) {
 566                                 sr = vertical_fence->split_ratio + (double) dx / (double) vertical_fence->rectangle.width;
 567                         } else {
 568                                 sr = (double) (dx - vertical_fence->rectangle.x) / (double) vertical_fence->rectangle.width;
 569                         }
 570                         sr = MAX(0, sr);
 571                         sr = MIN(1, sr);
 572                         vertical_fence->split_ratio = sr;
 573                 }
 574                 if (horizontal_fence != NULL) {
 575                         double sr = 0.0;
 576                         if (relative) {
 577                                 sr = horizontal_fence->split_ratio + (double) dy / (double) horizontal_fence->rectangle.height;
 578                         } else {
 579                                 sr = (double) (dy - horizontal_fence->rectangle.y) / (double) horizontal_fence->rectangle.height;
 580                         }
 581                         sr = MAX(0, sr);
 582                         sr = MIN(1, sr);
 583                         horizontal_fence->split_ratio = sr;
 584                 }
 585                 node_t *target_fence = horizontal_fence != NULL ? horizontal_fence : vertical_fence;
 586                 adjust_ratios(target_fence, target_fence->rectangle);
 587                 arrange(loc->monitor, loc->desktop);
 588         } else {
 589                 int w = width, h = height;
 590                 if (relative) {
 591                         w += dx * (rh & HANDLE_LEFT ? -1 : (rh & HANDLE_RIGHT ? 1 : 0));
 592                         h += dy * (rh & HANDLE_TOP ? -1 : (rh & HANDLE_BOTTOM ? 1 : 0));
 593                 } else {
 594                         if (rh & HANDLE_LEFT) {
 595                                 w = x + width - dx;
 596                         } else if (rh & HANDLE_RIGHT) {
 597                                 w = dx - x;
 598                         }
 599                         if (rh & HANDLE_TOP) {
 600                                 h = y + height - dy;
 601                         } else if (rh & HANDLE_BOTTOM) {
 602                                 h = dy - y;
 603                         }
 604                 }
 605                 width = MAX(1, w);
 606                 height = MAX(1, h);
 607                 apply_size_hints(n->client, &width, &height);
 608                 if (rh & HANDLE_LEFT) {
 609                         x += rect.width - width;
 610                 }
 611                 if (rh & HANDLE_TOP) {
 612                         y += rect.height - height;
 613                 }
 614                 n->client->floating_rectangle = (xcb_rectangle_t) {x, y, width, height};
 615                 if (n->client->state == STATE_FLOATING) {
 616                         window_move_resize(n->id, x, y, width, height);
 617
 618                         if (!grabbing) {
 619                                 put_status(SBSC_MASK_NODE_GEOMETRY, "node_geometry 0x%08X 0x%08X 0x%08X %ux%u+%i+%i\n", loc->monitor->id, loc->desktop->id, loc->node->id, width, height, x, y);
 620                         }
 621                 } else {
 622                         arrange(loc->monitor, loc->desktop);
 623                 }
 624         }
 625         return true;
 626 }
 627
 628 /* taken from awesomeWM */
 629 void apply_size_hints(client_t *c, uint16_t *width, uint16_t *height)
 630 {
 631         if (!honor_size_hints) {
 632                 return;
 633         }
 634
 635         int32_t minw = 0, minh = 0;
 636         int32_t basew = 0, baseh = 0, real_basew = 0, real_baseh = 0;
 637
 638         if (c->state == STATE_FULLSCREEN) {
 639                 return;
 640         }
 641
 642         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 643                 basew = c->size_hints.base_width;
 644                 baseh = c->size_hints.base_height;
 645                 real_basew = basew;
 646                 real_baseh = baseh;
 647         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 648                 /* base size is substituted with min size if not specified */
 649                 basew = c->size_hints.min_width;
 650                 baseh = c->size_hints.min_height;
 651         }
 652
 653         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 654                 minw = c->size_hints.min_width;
 655                 minh = c->size_hints.min_height;
 656         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 657                 /* min size is substituted with base size if not specified */
 658                 minw = c->size_hints.base_width;
 659                 minh = c->size_hints.base_height;
 660         }
 661
 662         /* Handle the size aspect ratio */
 663         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT &&
 664             c->size_hints.min_aspect_den > 0 &&
 665             c->size_hints.max_aspect_den > 0 &&
 666             *height > real_baseh &&
 667             *width > real_basew) {
 668                 /* ICCCM mandates:
 669                  * If a base size is provided along with the aspect ratio fields, the base size should be subtracted from the
 670                  * window size prior to checking that the aspect ratio falls in range. If a base size is not provided, nothing
 671                  * should be subtracted from the window size. (The minimum size is not to be used in place of the base size for
 672                  * this purpose.)
 673                  */
 674                 double dx = *width - real_basew;
 675                 double dy = *height - real_baseh;
 676                 double ratio = dx / dy;
 677                 double min = c->size_hints.min_aspect_num / (double) c->size_hints.min_aspect_den;
 678                 double max = c->size_hints.max_aspect_num / (double) c->size_hints.max_aspect_den;
 679
 680                 if (max > 0 && min > 0 && ratio > 0) {
 681                         if (ratio < min) {
 682                                 /* dx is lower than allowed, make dy lower to compensate this (+ 0.5 to force proper rounding). */
 683                                 dy = dx / min + 0.5;
 684                                 *width  = dx + real_basew;
 685                                 *height = dy + real_baseh;
 686                         } else if (ratio > max) {
 687                                 /* dx is too high, lower it (+0.5 for proper rounding) */
 688                                 dx = dy * max + 0.5;
 689                                 *width  = dx + real_basew;
 690                                 *height = dy + real_baseh;
 691                         }
 692                 }
 693         }
 694
 695         /* Handle the minimum size */
 696         *width = MAX(*width, minw);
 697         *height = MAX(*height, minh);
 698
 699         /* Handle the maximum size */
 700         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MAX_SIZE)
 701         {
 702                 if (c->size_hints.max_width > 0) {
 703                         *width = MIN(*width, c->size_hints.max_width);
 704                 }
 705                 if (c->size_hints.max_height > 0) {
 706                         *height = MIN(*height, c->size_hints.max_height);
 707                 }
 708         }
 709
 710         /* Handle the size increment */
 711         if (c->size_hints.flags & (XCB_ICCCM_SIZE_HINT_P_RESIZE_INC | XCB_ICCCM_SIZE_HINT_BASE_SIZE) &&
 712             c->size_hints.width_inc > 0 && c->size_hints.height_inc > 0) {
 713                 uint16_t t1 = *width, t2 = *height;
 714                 unsigned_subtract(t1, basew);
 715                 unsigned_subtract(t2, baseh);
 716                 *width -= t1 % c->size_hints.width_inc;
 717                 *height -= t2 % c->size_hints.height_inc;
 718         }
 719 }
 720
 721 void query_pointer(xcb_window_t *win, xcb_point_t *pt)
 722 {
 723         if (motion_recorder.enabled) {
 724                 window_hide(motion_recorder.id);
 725         }
 726
 727         xcb_query_pointer_reply_t *qpr = xcb_query_pointer_reply(dpy, xcb_query_pointer(dpy, root), NULL);
 728
 729         if (qpr != NULL) {
 730                 if (win != NULL) {
 731                         *win = qpr->child;
 732                         xcb_point_t pt = {qpr->root_x, qpr->root_y};
 733                         for (stacking_list_t *s = stack_tail; s != NULL; s = s->prev) {
 734                                 if (!s->node->client->shown || s->node->hidden) {
 735                                         continue;
 736                                 }
 737                                 xcb_rectangle_t rect = get_rectangle(NULL, NULL, s->node);
 738                                 if (is_inside(pt, rect)) {
 739                                         if (s->node->id == qpr->child || is_presel_window(qpr->child)) {
 740                                                 *win = s->node->id;
 741                                         }
 742                                         break;
 743                                 }
 744                         }
 745                 }
 746                 if (pt != NULL) {
 747                         *pt = (xcb_point_t) {qpr->root_x, qpr->root_y};
 748                 }
 749         }
 750
 751         free(qpr);
 752
 753         if (motion_recorder.enabled) {
 754                 window_show(motion_recorder.id);
 755         }
 756 }
 757
 758 void update_motion_recorder(void)
 759 {
 760         xcb_point_t pt;
 761         xcb_window_t win = XCB_NONE;
 762         query_pointer(&win, &pt);
 763         if (win == XCB_NONE) {
 764                 return;
 765         }
 766         monitor_t *m = monitor_from_point(pt);
 767         if (m == NULL) {
 768                 return;
 769         }
 770         desktop_t *d = m->desk;
 771         node_t *n = NULL;
 772         for (n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 773                 if (n->id == win || (n->presel != NULL && n->presel->feedback == win)) {
 774                         break;
 775                 }
 776         }
 777         if ((n != NULL && n != mon->desk->focus) || (n == NULL && m != mon)) {
 778                 enable_motion_recorder(win);
 779         } else {
 780                 disable_motion_recorder();
 781         }
 782 }
 783
 784 void enable_motion_recorder(xcb_window_t win)
 785 {
 786         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, win), NULL);
 787         if (geo != NULL) {
 788                 uint16_t width = geo->width + 2 * geo->border_width;
 789                 uint16_t height = geo->height + 2 * geo->border_width;
 790                 window_move_resize(motion_recorder.id, geo->x, geo->y, width, height);
 791                 window_above(motion_recorder.id, win);
 792                 window_show(motion_recorder.id);
 793                 motion_recorder.enabled = true;
 794         }
 795         free(geo);
 796 }
 797
 798 void disable_motion_recorder(void)
 799 {
 800         if (!motion_recorder.enabled) {
 801                 return;
 802         }
 803         window_hide(motion_recorder.id);
 804         motion_recorder.enabled = false;
 805 }
 806
 807 void window_border_width(xcb_window_t win, uint32_t bw)
 808 {
 809         uint32_t values[] = {bw};
 810         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_BORDER_WIDTH, values);
 811 }
 812
 813 void window_move(xcb_window_t win, int16_t x, int16_t y)
 814 {
 815         uint32_t values[] = {x, y};
 816         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y, values);
 817 }
 818
 819 void window_resize(xcb_window_t win, uint16_t w, uint16_t h)
 820 {
 821         uint32_t values[] = {w, h};
 822         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_WIDTH_HEIGHT, values);
 823 }
 824
 825 void window_move_resize(xcb_window_t win, int16_t x, int16_t y, uint16_t w, uint16_t h)
 826 {
 827         uint32_t values[] = {x, y, w, h};
 828         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y_WIDTH_HEIGHT, values);
 829 }
 830
 831 void window_center(monitor_t *m, client_t *c)
 832 {
 833         xcb_rectangle_t *r = &c->floating_rectangle;
 834         xcb_rectangle_t a = m->rectangle;
 835         if (r->width >= a.width) {
 836                 r->x = a.x;
 837         } else {
 838                 r->x = a.x + (a.width - r->width) / 2;
 839         }
 840         if (r->height >= a.height) {
 841                 r->y = a.y;
 842         } else {
 843                 r->y = a.y + (a.height - r->height) / 2;
 844         }
 845         r->x -= c->border_width;
 846         r->y -= c->border_width;
 847 }
 848
 849 void window_stack(xcb_window_t w1, xcb_window_t w2, uint32_t mode)
 850 {
 851         if (w2 == XCB_NONE) {
 852                 return;
 853         }
 854         uint16_t mask = XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE;
 855         uint32_t values[] = {w2, mode};
 856         xcb_configure_window(dpy, w1, mask, values);
 857 }
 858
 859 /* Stack w1 above w2 */
 860 void window_above(xcb_window_t w1, xcb_window_t w2)
 861 {
 862         window_stack(w1, w2, XCB_STACK_MODE_ABOVE);
 863 }
 864
 865 /* Stack w1 below w2 */
 866 void window_below(xcb_window_t w1, xcb_window_t w2)
 867 {
 868         window_stack(w1, w2, XCB_STACK_MODE_BELOW);
 869 }
 870
 871 void window_lower(xcb_window_t win)
 872 {
 873         uint32_t values[] = {XCB_STACK_MODE_BELOW};
 874         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
 875 }
 876
 877 void window_set_visibility(xcb_window_t win, bool visible)
 878 {
 879         uint32_t values_off[] = {ROOT_EVENT_MASK & ~XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY};
 880         uint32_t values_on[] = {ROOT_EVENT_MASK};
 881         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_off);
 882         if (visible) {
 883                 set_window_state(win, XCB_ICCCM_WM_STATE_NORMAL);
 884                 xcb_map_window(dpy, win);
 885         } else {
 886                 xcb_unmap_window(dpy, win);
 887                 set_window_state(win, XCB_ICCCM_WM_STATE_ICONIC);
 888         }
 889         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_on);
 890 }
 891
 892 void window_hide(xcb_window_t win)
 893 {
 894         window_set_visibility(win, false);
 895 }
 896
 897 void window_show(xcb_window_t win)
 898 {
 899         window_set_visibility(win, true);
 900 }
 901
 902 void update_input_focus(void)
 903 {
 904         set_input_focus(mon->desk->focus);
 905 }
 906
 907 void set_input_focus(node_t *n)
 908 {
 909         if (n == NULL || n->client == NULL) {
 910                 clear_input_focus();
 911         } else {
 912                 if (n->client->icccm_props.input_hint) {
 913                         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_PARENT, n->id, XCB_CURRENT_TIME);
 914                 } else if (n->client->icccm_props.take_focus) {
 915                         send_client_message(n->id, ewmh->WM_PROTOCOLS, WM_TAKE_FOCUS);
 916                 }
 917         }
 918 }
 919
 920 void clear_input_focus(void)
 921 {
 922         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 923 }
 924
 925 void center_pointer(xcb_rectangle_t r)
 926 {
 927         if (grabbing) {
 928                 return;
 929         }
 930         int16_t cx = r.x + r.width / 2;
 931         int16_t cy = r.y + r.height / 2;
 932         xcb_warp_pointer(dpy, XCB_NONE, root, 0, 0, 0, 0, cx, cy);
 933 }
 934
 935 void get_atom(char *name, xcb_atom_t *atom)
 936 {
 937         xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(dpy, xcb_intern_atom(dpy, 0, strlen(name), name), NULL);
 938         if (reply != NULL) {
 939                 *atom = reply->atom;
 940         } else {
 941                 *atom = XCB_NONE;
 942         }
 943         free(reply);
 944 }
 945
 946 void set_atom(xcb_window_t win, xcb_atom_t atom, uint32_t value)
 947 {
 948         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, atom, XCB_ATOM_CARDINAL, 32, 1, &value);
 949 }
 950
 951 void send_client_message(xcb_window_t win, xcb_atom_t property, xcb_atom_t value)
 952 {
 953         xcb_client_message_event_t *e = calloc(32, 1);
 954
 955         e->response_type = XCB_CLIENT_MESSAGE;
 956         e->window = win;
 957         e->type = property;
 958         e->format = 32;
 959         e->data.data32[0] = value;
 960         e->data.data32[1] = XCB_CURRENT_TIME;
 961
 962         xcb_send_event(dpy, false, win, XCB_EVENT_MASK_NO_EVENT, (char *) e);
 963         xcb_flush(dpy);
 964         free(e);
 965 }
 966
 967 bool window_exists(xcb_window_t win)
 968 {
 969         xcb_generic_error_t *err;
 970         free(xcb_query_tree_reply(dpy, xcb_query_tree(dpy, win), &err));
 971
 972         if (err != NULL) {
 973                 free(err);
 974                 return false;
 975         }
 976
 977         return true;
 978 }