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