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_consequence();
  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         ewmh_update_client_list(false);
 205         ewmh_set_wm_desktop(n, d);
 206
 207         if (!csq->hidden && csq->focus) {
 208                 if (d == mon->desk || csq->follow) {
 209                         focus_node(m, d, n);
 210                 } else {
 211                         activate_node(m, d, n);
 212                 }
 213         } else {
 214                 stack(d, n, false);
 215                 draw_border(n, false, (m == mon));
 216         }
 217
 218         free(csq->layer);
 219         free(csq->state);
 220
 221         return true;
 222 }
 223
 224 void set_window_state(xcb_window_t win, xcb_icccm_wm_state_t state)
 225 {
 226         long data[] = {state, XCB_NONE};
 227         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, WM_STATE, WM_STATE, 32, 2, data);
 228 }
 229
 230 void unmanage_window(xcb_window_t win)
 231 {
 232         coordinates_t loc;
 233         if (locate_window(win, &loc)) {
 234                 put_status(SBSC_MASK_NODE_REMOVE, "node_remove 0x%08X 0x%08X 0x%08X\n", loc.monitor->id, loc.desktop->id, win);
 235                 remove_node(loc.monitor, loc.desktop, loc.node);
 236                 arrange(loc.monitor, loc.desktop);
 237         } else {
 238                 for (pending_rule_t *pr = pending_rule_head; pr != NULL; pr = pr->next) {
 239                         if (pr->win == win) {
 240                                 remove_pending_rule(pr);
 241                                 return;
 242                         }
 243                 }
 244         }
 245 }
 246
 247 bool is_presel_window(xcb_window_t win)
 248 {
 249         xcb_icccm_get_wm_class_reply_t reply;
 250         bool ret = false;
 251         if (xcb_icccm_get_wm_class_reply(dpy, xcb_icccm_get_wm_class(dpy, win), &reply, NULL) == 1) {
 252                 if (streq(BSPWM_CLASS_NAME, reply.class_name) && streq(PRESEL_FEEDBACK_I, reply.instance_name)) {
 253                         ret = true;
 254                 }
 255                 xcb_icccm_get_wm_class_reply_wipe(&reply);
 256         }
 257         return ret;
 258 }
 259
 260 void initialize_presel_feedback(node_t *n)
 261 {
 262         if (n == NULL || n->presel == NULL || n->presel->feedback != XCB_NONE) {
 263                 return;
 264         }
 265
 266         xcb_window_t win = xcb_generate_id(dpy);
 267         uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_SAVE_UNDER;
 268         uint32_t values[] = {get_color_pixel(presel_feedback_color), 1};
 269         xcb_create_window(dpy, XCB_COPY_FROM_PARENT, win, root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 270                                   XCB_COPY_FROM_PARENT, mask, values);
 271
 272         xcb_icccm_set_wm_class(dpy, win, sizeof(PRESEL_FEEDBACK_IC), PRESEL_FEEDBACK_IC);
 273         /* Make presel window's input shape NULL to pass any input to window below */
 274         xcb_shape_rectangles(dpy, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_CLIP_ORDERING_UNSORTED, win, 0, 0, 0, NULL);
 275         stacking_list_t *s = stack_tail;
 276         while (s != NULL && !IS_TILED(s->node->client)) {
 277                 s = s->prev;
 278         }
 279         if (s != NULL) {
 280                 window_above(win, s->node->id);
 281         }
 282         n->presel->feedback = win;
 283 }
 284
 285 void draw_presel_feedback(monitor_t *m, desktop_t *d, node_t *n)
 286 {
 287         if (n == NULL || n->presel == NULL || d->layout == LAYOUT_MONOCLE || !presel_feedback) {
 288                 return;
 289         }
 290
 291         bool exists = (n->presel->feedback != XCB_NONE);
 292         if (!exists) {
 293                 initialize_presel_feedback(n);
 294         }
 295
 296         int gap = gapless_monocle && IS_MONOCLE(d) ? 0 : d->window_gap;
 297         presel_t *p = n->presel;
 298         xcb_rectangle_t rect = n->rectangle;
 299         rect.x = rect.y = 0;
 300         rect.width -= gap;
 301         rect.height -= gap;
 302         xcb_rectangle_t presel_rect = rect;
 303
 304         switch (p->split_dir) {
 305                 case DIR_NORTH:
 306                         presel_rect.height = p->split_ratio * rect.height;
 307                         break;
 308                 case DIR_EAST:
 309                         presel_rect.width = (1 - p->split_ratio) * rect.width;
 310                         presel_rect.x = rect.width - presel_rect.width;
 311                         break;
 312                 case DIR_SOUTH:
 313                         presel_rect.height = (1 - p->split_ratio) * rect.height;
 314                         presel_rect.y = rect.height - presel_rect.height;
 315                         break;
 316                 case DIR_WEST:
 317                         presel_rect.width = p->split_ratio * rect.width;
 318                         break;
 319         }
 320
 321         window_move_resize(p->feedback, n->rectangle.x + presel_rect.x, n->rectangle.y + presel_rect.y,
 322                            presel_rect.width, presel_rect.height);
 323
 324         if (!exists && m->desk == d) {
 325                 window_show(p->feedback);
 326         }
 327 }
 328
 329 void refresh_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 330 {
 331         if (n == NULL) {
 332                 return;
 333         } else {
 334                 if (n->presel != NULL) {
 335                         draw_presel_feedback(m, d, n);
 336                 }
 337                 refresh_presel_feedbacks(m, d, n->first_child);
 338                 refresh_presel_feedbacks(m, d, n->second_child);
 339         }
 340 }
 341
 342 void show_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 343 {
 344         if (n == NULL) {
 345                 return;
 346         } else {
 347                 if (n->presel != NULL) {
 348                         window_show(n->presel->feedback);
 349                 }
 350                 show_presel_feedbacks(m, d, n->first_child);
 351                 show_presel_feedbacks(m, d, n->second_child);
 352         }
 353 }
 354
 355 void hide_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 356 {
 357         if (n == NULL) {
 358                 return;
 359         } else {
 360                 if (n->presel != NULL) {
 361                         window_hide(n->presel->feedback);
 362                 }
 363                 hide_presel_feedbacks(m, d, n->first_child);
 364                 hide_presel_feedbacks(m, d, n->second_child);
 365         }
 366 }
 367
 368 void update_colors(void)
 369 {
 370         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 371                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 372                         update_colors_in(d->root, d, m);
 373                 }
 374         }
 375 }
 376
 377 void update_colors_in(node_t *n, desktop_t *d, monitor_t *m)
 378 {
 379         if (n == NULL) {
 380                 return;
 381         } else {
 382                 if (n->presel != NULL) {
 383                         uint32_t pxl = get_color_pixel(presel_feedback_color);
 384                         xcb_change_window_attributes(dpy, n->presel->feedback, XCB_CW_BACK_PIXEL, &pxl);
 385                         if (d == m->desk) {
 386                                 /* hack to induce back pixel refresh */
 387                                 window_hide(n->presel->feedback);
 388                                 window_show(n->presel->feedback);
 389                         }
 390                 }
 391                 if (n == d->focus) {
 392                         draw_border(n, true, (m == mon));
 393                 } else if (n->client != NULL) {
 394                         draw_border(n, false, (m == mon));
 395                 } else {
 396                         update_colors_in(n->first_child, d, m);
 397                         update_colors_in(n->second_child, d, m);
 398                 }
 399         }
 400 }
 401
 402 void draw_border(node_t *n, bool focused_node, bool focused_monitor)
 403 {
 404         if (n == NULL) {
 405                 return;
 406         }
 407
 408         uint32_t border_color_pxl = get_border_color(focused_node, focused_monitor);
 409         for (node_t *f = first_extrema(n); f != NULL; f = next_leaf(f, n)) {
 410                 if (f->client != NULL) {
 411                         window_draw_border(f->id, border_color_pxl);
 412                 }
 413         }
 414 }
 415
 416 void window_draw_border(xcb_window_t win, uint32_t border_color_pxl)
 417 {
 418         xcb_change_window_attributes(dpy, win, XCB_CW_BORDER_PIXEL, &border_color_pxl);
 419 }
 420
 421 void adopt_orphans(void)
 422 {
 423         xcb_query_tree_reply_t *qtr = xcb_query_tree_reply(dpy, xcb_query_tree(dpy, root), NULL);
 424         if (qtr == NULL) {
 425                 return;
 426         }
 427
 428         int len = xcb_query_tree_children_length(qtr);
 429         xcb_window_t *wins = xcb_query_tree_children(qtr);
 430
 431         for (int i = 0; i < len; i++) {
 432                 uint32_t idx;
 433                 xcb_window_t win = wins[i];
 434                 if (xcb_ewmh_get_wm_desktop_reply(ewmh, xcb_ewmh_get_wm_desktop(ewmh, win), &idx, NULL) == 1) {
 435                         schedule_window(win);
 436                 }
 437         }
 438
 439         free(qtr);
 440 }
 441
 442 uint32_t get_border_color(bool focused_node, bool focused_monitor)
 443 {
 444         if (focused_monitor && focused_node) {
 445                 return get_color_pixel(focused_border_color);
 446         } else if (focused_node) {
 447                 return get_color_pixel(active_border_color);
 448         } else {
 449                 return get_color_pixel(normal_border_color);
 450         }
 451 }
 452
 453 void initialize_floating_rectangle(node_t *n)
 454 {
 455         client_t *c = n->client;
 456
 457         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 458
 459         if (geo != NULL) {
 460                 c->floating_rectangle = (xcb_rectangle_t) {geo->x, geo->y, geo->width, geo->height};
 461         }
 462
 463         free(geo);
 464 }
 465
 466 xcb_rectangle_t get_window_rectangle(node_t *n)
 467 {
 468         client_t *c = n->client;
 469         if (c != NULL) {
 470                 xcb_get_geometry_reply_t *g = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 471                 if (g != NULL) {
 472                         xcb_rectangle_t rect = (xcb_rectangle_t) {g->x, g->y, g->width, g->height};
 473                         free(g);
 474                         return rect;
 475                 }
 476         }
 477         return (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 478 }
 479
 480 bool move_client(coordinates_t *loc, int dx, int dy)
 481 {
 482         node_t *n = loc->node;
 483
 484         if (n == NULL || n->client == NULL) {
 485                 return false;
 486         }
 487
 488         monitor_t *pm = NULL;
 489
 490         if (IS_TILED(n->client)) {
 491                 if (!grabbing) {
 492                         return false;
 493                 }
 494                 xcb_window_t pwin = XCB_NONE;
 495                 query_pointer(&pwin, NULL);
 496                 if (pwin == n->id) {
 497                         return false;
 498                 }
 499                 coordinates_t dst;
 500                 bool is_managed = (pwin != XCB_NONE && locate_window(pwin, &dst));
 501                 if (is_managed && dst.monitor == loc->monitor && IS_TILED(dst.node->client)) {
 502                         swap_nodes(loc->monitor, loc->desktop, n, loc->monitor, loc->desktop, dst.node, false);
 503                         return true;
 504                 } else {
 505                         if (is_managed && dst.monitor == loc->monitor) {
 506                                 return false;
 507                         } else {
 508                                 xcb_point_t pt = {0, 0};
 509                                 query_pointer(NULL, &pt);
 510                                 pm = monitor_from_point(pt);
 511                         }
 512                 }
 513         } else {
 514                 client_t *c = n->client;
 515                 xcb_rectangle_t rect = c->floating_rectangle;
 516                 int16_t x = rect.x + dx;
 517                 int16_t y = rect.y + dy;
 518
 519                 window_move(n->id, x, y);
 520
 521                 c->floating_rectangle.x = x;
 522                 c->floating_rectangle.y = y;
 523                 if (!grabbing) {
 524                         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);
 525                 }
 526                 pm = monitor_from_client(c);
 527         }
 528
 529         if (pm == NULL || pm == loc->monitor) {
 530                 return true;
 531         }
 532
 533         transfer_node(loc->monitor, loc->desktop, n, pm, pm->desk, pm->desk->focus, true);
 534         loc->monitor = pm;
 535         loc->desktop = pm->desk;
 536
 537         return true;
 538 }
 539
 540 bool resize_client(coordinates_t *loc, resize_handle_t rh, int dx, int dy, bool relative)
 541 {
 542         node_t *n = loc->node;
 543         if (n == NULL || n->client == NULL || n->client->state == STATE_FULLSCREEN) {
 544                 return false;
 545         }
 546         node_t *horizontal_fence = NULL, *vertical_fence = NULL;
 547         xcb_rectangle_t rect = get_rectangle(NULL, NULL, n);
 548         uint16_t width = rect.width, height = rect.height;
 549         int16_t x = rect.x, y = rect.y;
 550         if (n->client->state == STATE_TILED) {
 551                 if (rh & HANDLE_LEFT) {
 552                         vertical_fence = find_fence(n, DIR_WEST);
 553                 } else if (rh & HANDLE_RIGHT) {
 554                         vertical_fence = find_fence(n, DIR_EAST);
 555                 }
 556                 if (rh & HANDLE_TOP) {
 557                         horizontal_fence = find_fence(n, DIR_NORTH);
 558                 } else if (rh & HANDLE_BOTTOM) {
 559                         horizontal_fence = find_fence(n, DIR_SOUTH);
 560                 }
 561                 if (vertical_fence == NULL && horizontal_fence == NULL) {
 562                         return false;
 563                 }
 564                 if (vertical_fence != NULL) {
 565                         double sr = 0.0;
 566                         if (relative) {
 567                                 sr = vertical_fence->split_ratio + (double) dx / (double) vertical_fence->rectangle.width;
 568                         } else {
 569                                 sr = (double) (dx - vertical_fence->rectangle.x) / (double) vertical_fence->rectangle.width;
 570                         }
 571                         sr = MAX(0, sr);
 572                         sr = MIN(1, sr);
 573                         vertical_fence->split_ratio = sr;
 574                 }
 575                 if (horizontal_fence != NULL) {
 576                         double sr = 0.0;
 577                         if (relative) {
 578                                 sr = horizontal_fence->split_ratio + (double) dy / (double) horizontal_fence->rectangle.height;
 579                         } else {
 580                                 sr = (double) (dy - horizontal_fence->rectangle.y) / (double) horizontal_fence->rectangle.height;
 581                         }
 582                         sr = MAX(0, sr);
 583                         sr = MIN(1, sr);
 584                         horizontal_fence->split_ratio = sr;
 585                 }
 586                 node_t *target_fence = horizontal_fence != NULL ? horizontal_fence : vertical_fence;
 587                 adjust_ratios(target_fence, target_fence->rectangle);
 588                 arrange(loc->monitor, loc->desktop);
 589         } else {
 590                 int w = width, h = height;
 591                 if (relative) {
 592                         w += dx * (rh & HANDLE_LEFT ? -1 : (rh & HANDLE_RIGHT ? 1 : 0));
 593                         h += dy * (rh & HANDLE_TOP ? -1 : (rh & HANDLE_BOTTOM ? 1 : 0));
 594                 } else {
 595                         if (rh & HANDLE_LEFT) {
 596                                 w = x + width - dx;
 597                         } else if (rh & HANDLE_RIGHT) {
 598                                 w = dx - x;
 599                         }
 600                         if (rh & HANDLE_TOP) {
 601                                 h = y + height - dy;
 602                         } else if (rh & HANDLE_BOTTOM) {
 603                                 h = dy - y;
 604                         }
 605                 }
 606                 width = MAX(1, w);
 607                 height = MAX(1, h);
 608                 apply_size_hints(n->client, &width, &height);
 609                 if (rh & HANDLE_LEFT) {
 610                         x += rect.width - width;
 611                 }
 612                 if (rh & HANDLE_TOP) {
 613                         y += rect.height - height;
 614                 }
 615                 n->client->floating_rectangle = (xcb_rectangle_t) {x, y, width, height};
 616                 if (n->client->state == STATE_FLOATING) {
 617                         window_move_resize(n->id, x, y, width, height);
 618
 619                         if (!grabbing) {
 620                                 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);
 621                         }
 622                 } else {
 623                         arrange(loc->monitor, loc->desktop);
 624                 }
 625         }
 626         return true;
 627 }
 628
 629 /* taken from awesomeWM */
 630 void apply_size_hints(client_t *c, uint16_t *width, uint16_t *height)
 631 {
 632         if (!honor_size_hints) {
 633                 return;
 634         }
 635
 636         int32_t minw = 0, minh = 0;
 637         int32_t basew = 0, baseh = 0, real_basew = 0, real_baseh = 0;
 638
 639         if (c->state == STATE_FULLSCREEN) {
 640                 return;
 641         }
 642
 643         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 644                 basew = c->size_hints.base_width;
 645                 baseh = c->size_hints.base_height;
 646                 real_basew = basew;
 647                 real_baseh = baseh;
 648         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 649                 /* base size is substituted with min size if not specified */
 650                 basew = c->size_hints.min_width;
 651                 baseh = c->size_hints.min_height;
 652         }
 653
 654         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 655                 minw = c->size_hints.min_width;
 656                 minh = c->size_hints.min_height;
 657         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 658                 /* min size is substituted with base size if not specified */
 659                 minw = c->size_hints.base_width;
 660                 minh = c->size_hints.base_height;
 661         }
 662
 663         /* Handle the size aspect ratio */
 664         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT &&
 665             c->size_hints.min_aspect_den > 0 &&
 666             c->size_hints.max_aspect_den > 0 &&
 667             *height > real_baseh &&
 668             *width > real_basew) {
 669                 /* ICCCM mandates:
 670                  * If a base size is provided along with the aspect ratio fields, the base size should be subtracted from the
 671                  * window size prior to checking that the aspect ratio falls in range. If a base size is not provided, nothing
 672                  * should be subtracted from the window size. (The minimum size is not to be used in place of the base size for
 673                  * this purpose.)
 674                  */
 675                 double dx = *width - real_basew;
 676                 double dy = *height - real_baseh;
 677                 double ratio = dx / dy;
 678                 double min = c->size_hints.min_aspect_num / (double) c->size_hints.min_aspect_den;
 679                 double max = c->size_hints.max_aspect_num / (double) c->size_hints.max_aspect_den;
 680
 681                 if (max > 0 && min > 0 && ratio > 0) {
 682                         if (ratio < min) {
 683                                 /* dx is lower than allowed, make dy lower to compensate this (+ 0.5 to force proper rounding). */
 684                                 dy = dx / min + 0.5;
 685                                 *width  = dx + real_basew;
 686                                 *height = dy + real_baseh;
 687                         } else if (ratio > max) {
 688                                 /* dx is too high, lower it (+0.5 for proper rounding) */
 689                                 dx = dy * max + 0.5;
 690                                 *width  = dx + real_basew;
 691                                 *height = dy + real_baseh;
 692                         }
 693                 }
 694         }
 695
 696         /* Handle the minimum size */
 697         *width = MAX(*width, minw);
 698         *height = MAX(*height, minh);
 699
 700         /* Handle the maximum size */
 701         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MAX_SIZE)
 702         {
 703                 if (c->size_hints.max_width > 0) {
 704                         *width = MIN(*width, c->size_hints.max_width);
 705                 }
 706                 if (c->size_hints.max_height > 0) {
 707                         *height = MIN(*height, c->size_hints.max_height);
 708                 }
 709         }
 710
 711         /* Handle the size increment */
 712         if (c->size_hints.flags & (XCB_ICCCM_SIZE_HINT_P_RESIZE_INC | XCB_ICCCM_SIZE_HINT_BASE_SIZE) &&
 713             c->size_hints.width_inc > 0 && c->size_hints.height_inc > 0) {
 714                 uint16_t t1 = *width, t2 = *height;
 715                 unsigned_subtract(t1, basew);
 716                 unsigned_subtract(t2, baseh);
 717                 *width -= t1 % c->size_hints.width_inc;
 718                 *height -= t2 % c->size_hints.height_inc;
 719         }
 720 }
 721
 722 void query_pointer(xcb_window_t *win, xcb_point_t *pt)
 723 {
 724         if (motion_recorder.enabled) {
 725                 window_hide(motion_recorder.id);
 726         }
 727
 728         xcb_query_pointer_reply_t *qpr = xcb_query_pointer_reply(dpy, xcb_query_pointer(dpy, root), NULL);
 729
 730         if (qpr != NULL) {
 731                 if (win != NULL) {
 732                         *win = qpr->child;
 733                         xcb_point_t pt = {qpr->root_x, qpr->root_y};
 734                         for (stacking_list_t *s = stack_tail; s != NULL; s = s->prev) {
 735                                 if (!s->node->client->shown || s->node->hidden) {
 736                                         continue;
 737                                 }
 738                                 xcb_rectangle_t rect = get_rectangle(NULL, NULL, s->node);
 739                                 if (is_inside(pt, rect)) {
 740                                         if (s->node->id == qpr->child || is_presel_window(qpr->child)) {
 741                                                 *win = s->node->id;
 742                                         }
 743                                         break;
 744                                 }
 745                         }
 746                 }
 747                 if (pt != NULL) {
 748                         *pt = (xcb_point_t) {qpr->root_x, qpr->root_y};
 749                 }
 750         }
 751
 752         free(qpr);
 753
 754         if (motion_recorder.enabled) {
 755                 window_show(motion_recorder.id);
 756         }
 757 }
 758
 759 void update_motion_recorder(void)
 760 {
 761         xcb_point_t pt;
 762         xcb_window_t win = XCB_NONE;
 763         query_pointer(&win, &pt);
 764         if (win == XCB_NONE) {
 765                 return;
 766         }
 767         monitor_t *m = monitor_from_point(pt);
 768         if (m == NULL) {
 769                 return;
 770         }
 771         desktop_t *d = m->desk;
 772         node_t *n = NULL;
 773         for (n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 774                 if (n->id == win || (n->presel != NULL && n->presel->feedback == win)) {
 775                         break;
 776                 }
 777         }
 778         if ((n != NULL && n != mon->desk->focus) || (n == NULL && m != mon)) {
 779                 enable_motion_recorder(win);
 780         } else {
 781                 disable_motion_recorder();
 782         }
 783 }
 784
 785 void enable_motion_recorder(xcb_window_t win)
 786 {
 787         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, win), NULL);
 788         if (geo != NULL) {
 789                 uint16_t width = geo->width + 2 * geo->border_width;
 790                 uint16_t height = geo->height + 2 * geo->border_width;
 791                 window_move_resize(motion_recorder.id, geo->x, geo->y, width, height);
 792                 window_above(motion_recorder.id, win);
 793                 window_show(motion_recorder.id);
 794                 motion_recorder.enabled = true;
 795         }
 796         free(geo);
 797 }
 798
 799 void disable_motion_recorder(void)
 800 {
 801         if (!motion_recorder.enabled) {
 802                 return;
 803         }
 804         window_hide(motion_recorder.id);
 805         motion_recorder.enabled = false;
 806 }
 807
 808 void window_border_width(xcb_window_t win, uint32_t bw)
 809 {
 810         uint32_t values[] = {bw};
 811         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_BORDER_WIDTH, values);
 812 }
 813
 814 void window_move(xcb_window_t win, int16_t x, int16_t y)
 815 {
 816         uint32_t values[] = {x, y};
 817         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y, values);
 818 }
 819
 820 void window_resize(xcb_window_t win, uint16_t w, uint16_t h)
 821 {
 822         uint32_t values[] = {w, h};
 823         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_WIDTH_HEIGHT, values);
 824 }
 825
 826 void window_move_resize(xcb_window_t win, int16_t x, int16_t y, uint16_t w, uint16_t h)
 827 {
 828         uint32_t values[] = {x, y, w, h};
 829         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y_WIDTH_HEIGHT, values);
 830 }
 831
 832 void window_center(monitor_t *m, client_t *c)
 833 {
 834         xcb_rectangle_t *r = &c->floating_rectangle;
 835         xcb_rectangle_t a = m->rectangle;
 836         if (r->width >= a.width) {
 837                 r->x = a.x;
 838         } else {
 839                 r->x = a.x + (a.width - r->width) / 2;
 840         }
 841         if (r->height >= a.height) {
 842                 r->y = a.y;
 843         } else {
 844                 r->y = a.y + (a.height - r->height) / 2;
 845         }
 846         r->x -= c->border_width;
 847         r->y -= c->border_width;
 848 }
 849
 850 void window_stack(xcb_window_t w1, xcb_window_t w2, uint32_t mode)
 851 {
 852         if (w2 == XCB_NONE) {
 853                 return;
 854         }
 855         uint16_t mask = XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE;
 856         uint32_t values[] = {w2, mode};
 857         xcb_configure_window(dpy, w1, mask, values);
 858 }
 859
 860 /* Stack w1 above w2 */
 861 void window_above(xcb_window_t w1, xcb_window_t w2)
 862 {
 863         window_stack(w1, w2, XCB_STACK_MODE_ABOVE);
 864 }
 865
 866 /* Stack w1 below w2 */
 867 void window_below(xcb_window_t w1, xcb_window_t w2)
 868 {
 869         window_stack(w1, w2, XCB_STACK_MODE_BELOW);
 870 }
 871
 872 void window_lower(xcb_window_t win)
 873 {
 874         uint32_t values[] = {XCB_STACK_MODE_BELOW};
 875         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
 876 }
 877
 878 void window_set_visibility(xcb_window_t win, bool visible)
 879 {
 880         uint32_t values_off[] = {ROOT_EVENT_MASK & ~XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY};
 881         uint32_t values_on[] = {ROOT_EVENT_MASK};
 882         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_off);
 883         if (visible) {
 884                 set_window_state(win, XCB_ICCCM_WM_STATE_NORMAL);
 885                 xcb_map_window(dpy, win);
 886         } else {
 887                 xcb_unmap_window(dpy, win);
 888                 set_window_state(win, XCB_ICCCM_WM_STATE_ICONIC);
 889         }
 890         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_on);
 891 }
 892
 893 void window_hide(xcb_window_t win)
 894 {
 895         window_set_visibility(win, false);
 896 }
 897
 898 void window_show(xcb_window_t win)
 899 {
 900         window_set_visibility(win, true);
 901 }
 902
 903 void update_input_focus(void)
 904 {
 905         set_input_focus(mon->desk->focus);
 906 }
 907
 908 void set_input_focus(node_t *n)
 909 {
 910         if (n == NULL || n->client == NULL) {
 911                 clear_input_focus();
 912         } else {
 913                 if (n->client->icccm_props.input_hint) {
 914                         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_PARENT, n->id, XCB_CURRENT_TIME);
 915                 } else if (n->client->icccm_props.take_focus) {
 916                         send_client_message(n->id, ewmh->WM_PROTOCOLS, WM_TAKE_FOCUS);
 917                 }
 918         }
 919 }
 920
 921 void clear_input_focus(void)
 922 {
 923         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 924 }
 925
 926 void center_pointer(xcb_rectangle_t r)
 927 {
 928         if (grabbing) {
 929                 return;
 930         }
 931         int16_t cx = r.x + r.width / 2;
 932         int16_t cy = r.y + r.height / 2;
 933         xcb_warp_pointer(dpy, XCB_NONE, root, 0, 0, 0, 0, cx, cy);
 934 }
 935
 936 void get_atom(char *name, xcb_atom_t *atom)
 937 {
 938         xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(dpy, xcb_intern_atom(dpy, 0, strlen(name), name), NULL);
 939         if (reply != NULL) {
 940                 *atom = reply->atom;
 941         } else {
 942                 *atom = XCB_NONE;
 943         }
 944         free(reply);
 945 }
 946
 947 void set_atom(xcb_window_t win, xcb_atom_t atom, uint32_t value)
 948 {
 949         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, atom, XCB_ATOM_CARDINAL, 32, 1, &value);
 950 }
 951
 952 void send_client_message(xcb_window_t win, xcb_atom_t property, xcb_atom_t value)
 953 {
 954         xcb_client_message_event_t *e = calloc(32, 1);
 955
 956         e->response_type = XCB_CLIENT_MESSAGE;
 957         e->window = win;
 958         e->type = property;
 959         e->format = 32;
 960         e->data.data32[0] = value;
 961         e->data.data32[1] = XCB_CURRENT_TIME;
 962
 963         xcb_send_event(dpy, false, win, XCB_EVENT_MASK_NO_EVENT, (char *) e);
 964         xcb_flush(dpy);
 965         free(e);
 966 }
 967
 968 bool window_exists(xcb_window_t win)
 969 {
 970         xcb_generic_error_t *err;
 971         free(xcb_query_tree_reply(dpy, xcb_query_tree(dpy, win), &err));
 972
 973         if (err != NULL) {
 974                 free(err);
 975                 return false;
 976         }
 977
 978         return true;
 979 }