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 "desktop.h"
  34 #include "query.h"
  35 #include "rule.h"
  36 #include "settings.h"
  37 #include "geometry.h"
  38 #include "pointer.h"
  39 #include "stack.h"
  40 #include "tree.h"
  41 #include "parse.h"
  42 #include "window.h"
  43
  44 void schedule_window(xcb_window_t win)
  45 {
  46         coordinates_t loc;
  47         uint8_t override_redirect = 0;
  48         xcb_get_window_attributes_reply_t *wa = xcb_get_window_attributes_reply(dpy, xcb_get_window_attributes(dpy, win), NULL);
  49
  50         if (wa != NULL) {
  51                 override_redirect = wa->override_redirect;
  52                 free(wa);
  53         }
  54
  55         if (override_redirect || locate_window(win, &loc)) {
  56                 return;
  57         }
  58
  59         /* ignore pending windows */
  60         for (pending_rule_t *pr = pending_rule_head; pr != NULL; pr = pr->next) {
  61                 if (pr->win == win) {
  62                         return;
  63                 }
  64         }
  65
  66         rule_consequence_t *csq = make_rule_consequence();
  67         apply_rules(win, csq);
  68         if (!schedule_rules(win, csq)) {
  69                 manage_window(win, csq, -1);
  70                 free(csq);
  71         }
  72 }
  73
  74 bool manage_window(xcb_window_t win, rule_consequence_t *csq, int fd)
  75 {
  76         monitor_t *m = mon;
  77         desktop_t *d = mon->desk;
  78         node_t *f = mon->desk->focus;
  79
  80         parse_rule_consequence(fd, csq);
  81
  82         if (!ignore_ewmh_struts && ewmh_handle_struts(win)) {
  83                 for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  84                         arrange(m, m->desk);
  85                 }
  86         }
  87
  88         if (!csq->manage) {
  89                 free(csq->layer);
  90                 free(csq->state);
  91                 window_show(win);
  92                 return false;
  93         }
  94
  95         if (csq->node_desc[0] != '\0') {
  96                 coordinates_t ref = {m, d, f};
  97                 coordinates_t trg = {NULL, NULL, NULL};
  98                 if (node_from_desc(csq->node_desc, &ref, &trg) == SELECTOR_OK) {
  99                         m = trg.monitor;
 100                         d = trg.desktop;
 101                         f = trg.node;
 102                 }
 103         } else if (csq->desktop_desc[0] != '\0') {
 104                 coordinates_t ref = {m, d, NULL};
 105                 coordinates_t trg = {NULL, NULL, NULL};
 106                 if (desktop_from_desc(csq->desktop_desc, &ref, &trg) == SELECTOR_OK) {
 107                         m = trg.monitor;
 108                         d = trg.desktop;
 109                         f = trg.desktop->focus;
 110                 }
 111         } else if (csq->monitor_desc[0] != '\0') {
 112                 coordinates_t ref = {m, NULL, NULL};
 113                 coordinates_t trg = {NULL, NULL, NULL};
 114                 if (monitor_from_desc(csq->monitor_desc, &ref, &trg) == SELECTOR_OK) {
 115                         m = trg.monitor;
 116                         d = trg.monitor->desk;
 117                         f = trg.monitor->desk->focus;
 118                 }
 119         }
 120
 121         if (csq->sticky) {
 122                 m = mon;
 123                 d = mon->desk;
 124                 f = mon->desk->focus;
 125         }
 126
 127         if (csq->split_dir != NULL && f != NULL) {
 128                 presel_dir(m, d, f, *csq->split_dir);
 129         }
 130
 131         if (csq->split_ratio != 0 && f != NULL) {
 132                 presel_ratio(m, d, f, csq->split_ratio);
 133         }
 134
 135         node_t *n = make_node(win);
 136         client_t *c = make_client();
 137         c->border_width = csq->border ? d->border_width : 0;
 138         n->client = c;
 139         initialize_client(n);
 140         initialize_floating_rectangle(n);
 141
 142         if (csq->rect != NULL) {
 143                 c->floating_rectangle = *csq->rect;
 144                 free(csq->rect);
 145         } else if (c->floating_rectangle.x == 0 && c->floating_rectangle.y == 0) {
 146                 csq->center = true;
 147         }
 148
 149         monitor_t *mm = monitor_from_client(c);
 150         embrace_client(mm, c);
 151         adapt_geometry(&mm->rectangle, &m->rectangle, n);
 152
 153         if (csq->center) {
 154                 window_center(m, c);
 155         }
 156
 157         snprintf(c->class_name, sizeof(c->class_name), "%s", csq->class_name);
 158         snprintf(c->instance_name, sizeof(c->instance_name), "%s", csq->instance_name);
 159
 160         if ((csq->state != NULL && (*(csq->state) == STATE_FLOATING || *(csq->state) == STATE_FULLSCREEN)) || csq->hidden) {
 161                 n->vacant = true;
 162         }
 163
 164         f = insert_node(m, d, n, f);
 165         clients_count++;
 166         if (single_monocle && d->layout == LAYOUT_MONOCLE && tiled_count(d->root, true) > 1) {
 167                 set_layout(m, d, d->user_layout, false);
 168         }
 169
 170         n->vacant = false;
 171
 172         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);
 173
 174         if (f != NULL && f->client != NULL && csq->state != NULL && *(csq->state) == STATE_FLOATING) {
 175                 c->layer = f->client->layer;
 176         }
 177
 178         if (csq->layer != NULL) {
 179                 c->layer = *(csq->layer);
 180         }
 181
 182         if (csq->state != NULL) {
 183                 set_state(m, d, n, *(csq->state));
 184         }
 185
 186         set_hidden(m, d, n, csq->hidden);
 187         set_sticky(m, d, n, csq->sticky);
 188         set_private(m, d, n, csq->private);
 189         set_locked(m, d, n, csq->locked);
 190         set_marked(m, d, n, csq->marked);
 191
 192         arrange(m, d);
 193
 194         uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
 195         xcb_change_window_attributes(dpy, win, XCB_CW_EVENT_MASK, values);
 196         set_window_state(win, XCB_ICCCM_WM_STATE_NORMAL);
 197         window_grab_buttons(win);
 198
 199         if (d == m->desk) {
 200                 show_node(d, n);
 201         } else {
 202                 hide_node(d, n);
 203         }
 204
 205         ewmh_update_client_list(false);
 206         ewmh_set_wm_desktop(n, d);
 207
 208         if (!csq->hidden && csq->focus) {
 209                 if (d == mon->desk || csq->follow) {
 210                         focus_node(m, d, n);
 211                 } else {
 212                         activate_node(m, d, n);
 213                 }
 214         } else {
 215                 stack(d, n, false);
 216                 draw_border(n, false, (m == mon));
 217         }
 218
 219         free(csq->layer);
 220         free(csq->state);
 221
 222         return true;
 223 }
 224
 225 void set_window_state(xcb_window_t win, xcb_icccm_wm_state_t state)
 226 {
 227         long data[] = {state, XCB_NONE};
 228         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, WM_STATE, WM_STATE, 32, 2, data);
 229 }
 230
 231 void unmanage_window(xcb_window_t win)
 232 {
 233         coordinates_t loc;
 234         if (locate_window(win, &loc)) {
 235                 put_status(SBSC_MASK_NODE_REMOVE, "node_remove 0x%08X 0x%08X 0x%08X\n", loc.monitor->id, loc.desktop->id, win);
 236                 remove_node(loc.monitor, loc.desktop, loc.node);
 237                 arrange(loc.monitor, loc.desktop);
 238         } else {
 239                 for (pending_rule_t *pr = pending_rule_head; pr != NULL; pr = pr->next) {
 240                         if (pr->win == win) {
 241                                 remove_pending_rule(pr);
 242                                 return;
 243                         }
 244                 }
 245         }
 246 }
 247
 248 bool is_presel_window(xcb_window_t win)
 249 {
 250         xcb_icccm_get_wm_class_reply_t reply;
 251         bool ret = false;
 252         if (xcb_icccm_get_wm_class_reply(dpy, xcb_icccm_get_wm_class(dpy, win), &reply, NULL) == 1) {
 253                 if (streq(BSPWM_CLASS_NAME, reply.class_name) && streq(PRESEL_FEEDBACK_I, reply.instance_name)) {
 254                         ret = true;
 255                 }
 256                 xcb_icccm_get_wm_class_reply_wipe(&reply);
 257         }
 258         return ret;
 259 }
 260
 261 void initialize_presel_feedback(node_t *n)
 262 {
 263         if (n == NULL || n->presel == NULL || n->presel->feedback != XCB_NONE) {
 264                 return;
 265         }
 266
 267         xcb_window_t win = xcb_generate_id(dpy);
 268         uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_SAVE_UNDER;
 269         uint32_t values[] = {get_color_pixel(presel_feedback_color), 1};
 270         xcb_create_window(dpy, XCB_COPY_FROM_PARENT, win, root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 271                                   XCB_COPY_FROM_PARENT, mask, values);
 272
 273         xcb_icccm_set_wm_class(dpy, win, sizeof(PRESEL_FEEDBACK_IC), PRESEL_FEEDBACK_IC);
 274         /* Make presel window's input shape NULL to pass any input to window below */
 275         xcb_shape_rectangles(dpy, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_CLIP_ORDERING_UNSORTED, win, 0, 0, 0, NULL);
 276         stacking_list_t *s = stack_tail;
 277         while (s != NULL && !IS_TILED(s->node->client)) {
 278                 s = s->prev;
 279         }
 280         if (s != NULL) {
 281                 window_above(win, s->node->id);
 282         }
 283         n->presel->feedback = win;
 284 }
 285
 286 void draw_presel_feedback(monitor_t *m, desktop_t *d, node_t *n)
 287 {
 288         if (n == NULL || n->presel == NULL || d->user_layout == LAYOUT_MONOCLE || !presel_feedback) {
 289                 return;
 290         }
 291
 292         bool exists = (n->presel->feedback != XCB_NONE);
 293         if (!exists) {
 294                 initialize_presel_feedback(n);
 295         }
 296
 297         int gap = gapless_monocle && d->layout == LAYOUT_MONOCLE ? 0 : d->window_gap;
 298         presel_t *p = n->presel;
 299         xcb_rectangle_t rect = n->rectangle;
 300         rect.x = rect.y = 0;
 301         rect.width -= gap;
 302         rect.height -= gap;
 303         xcb_rectangle_t presel_rect = rect;
 304
 305         switch (p->split_dir) {
 306                 case DIR_NORTH:
 307                         presel_rect.height = p->split_ratio * rect.height;
 308                         break;
 309                 case DIR_EAST:
 310                         presel_rect.width = (1 - p->split_ratio) * rect.width;
 311                         presel_rect.x = rect.width - presel_rect.width;
 312                         break;
 313                 case DIR_SOUTH:
 314                         presel_rect.height = (1 - p->split_ratio) * rect.height;
 315                         presel_rect.y = rect.height - presel_rect.height;
 316                         break;
 317                 case DIR_WEST:
 318                         presel_rect.width = p->split_ratio * rect.width;
 319                         break;
 320         }
 321
 322         window_move_resize(p->feedback, n->rectangle.x + presel_rect.x, n->rectangle.y + presel_rect.y,
 323                            presel_rect.width, presel_rect.height);
 324
 325         if (!exists && m->desk == d) {
 326                 window_show(p->feedback);
 327         }
 328 }
 329
 330 void refresh_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 331 {
 332         if (n == NULL) {
 333                 return;
 334         } else {
 335                 if (n->presel != NULL) {
 336                         draw_presel_feedback(m, d, n);
 337                 }
 338                 refresh_presel_feedbacks(m, d, n->first_child);
 339                 refresh_presel_feedbacks(m, d, n->second_child);
 340         }
 341 }
 342
 343 void show_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 344 {
 345         if (n == NULL) {
 346                 return;
 347         } else {
 348                 if (n->presel != NULL) {
 349                         window_show(n->presel->feedback);
 350                 }
 351                 show_presel_feedbacks(m, d, n->first_child);
 352                 show_presel_feedbacks(m, d, n->second_child);
 353         }
 354 }
 355
 356 void hide_presel_feedbacks(monitor_t *m, desktop_t *d, node_t *n)
 357 {
 358         if (n == NULL) {
 359                 return;
 360         } else {
 361                 if (n->presel != NULL) {
 362                         window_hide(n->presel->feedback);
 363                 }
 364                 hide_presel_feedbacks(m, d, n->first_child);
 365                 hide_presel_feedbacks(m, d, n->second_child);
 366         }
 367 }
 368
 369 void update_colors(void)
 370 {
 371         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 372                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 373                         update_colors_in(d->root, d, m);
 374                 }
 375         }
 376 }
 377
 378 void update_colors_in(node_t *n, desktop_t *d, monitor_t *m)
 379 {
 380         if (n == NULL) {
 381                 return;
 382         } else {
 383                 if (n->presel != NULL) {
 384                         uint32_t pxl = get_color_pixel(presel_feedback_color);
 385                         xcb_change_window_attributes(dpy, n->presel->feedback, XCB_CW_BACK_PIXEL, &pxl);
 386                         if (d == m->desk) {
 387                                 /* hack to induce back pixel refresh */
 388                                 window_hide(n->presel->feedback);
 389                                 window_show(n->presel->feedback);
 390                         }
 391                 }
 392                 if (n == d->focus) {
 393                         draw_border(n, true, (m == mon));
 394                 } else if (n->client != NULL) {
 395                         draw_border(n, false, (m == mon));
 396                 } else {
 397                         update_colors_in(n->first_child, d, m);
 398                         update_colors_in(n->second_child, d, m);
 399                 }
 400         }
 401 }
 402
 403 void draw_border(node_t *n, bool focused_node, bool focused_monitor)
 404 {
 405         if (n == NULL) {
 406                 return;
 407         }
 408
 409         uint32_t border_color_pxl = get_border_color(focused_node, focused_monitor);
 410         for (node_t *f = first_extrema(n); f != NULL; f = next_leaf(f, n)) {
 411                 if (f->client != NULL) {
 412                         window_draw_border(f->id, border_color_pxl);
 413                 }
 414         }
 415 }
 416
 417 void window_draw_border(xcb_window_t win, uint32_t border_color_pxl)
 418 {
 419         xcb_change_window_attributes(dpy, win, XCB_CW_BORDER_PIXEL, &border_color_pxl);
 420 }
 421
 422 void adopt_orphans(void)
 423 {
 424         xcb_query_tree_reply_t *qtr = xcb_query_tree_reply(dpy, xcb_query_tree(dpy, root), NULL);
 425         if (qtr == NULL) {
 426                 return;
 427         }
 428
 429         int len = xcb_query_tree_children_length(qtr);
 430         xcb_window_t *wins = xcb_query_tree_children(qtr);
 431
 432         for (int i = 0; i < len; i++) {
 433                 uint32_t idx;
 434                 xcb_window_t win = wins[i];
 435                 if (xcb_ewmh_get_wm_desktop_reply(ewmh, xcb_ewmh_get_wm_desktop(ewmh, win), &idx, NULL) == 1) {
 436                         schedule_window(win);
 437                 }
 438         }
 439
 440         free(qtr);
 441 }
 442
 443 uint32_t get_border_color(bool focused_node, bool focused_monitor)
 444 {
 445         if (focused_monitor && focused_node) {
 446                 return get_color_pixel(focused_border_color);
 447         } else if (focused_node) {
 448                 return get_color_pixel(active_border_color);
 449         } else {
 450                 return get_color_pixel(normal_border_color);
 451         }
 452 }
 453
 454 void initialize_floating_rectangle(node_t *n)
 455 {
 456         client_t *c = n->client;
 457
 458         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 459
 460         if (geo != NULL) {
 461                 c->floating_rectangle = (xcb_rectangle_t) {geo->x, geo->y, geo->width, geo->height};
 462         }
 463
 464         free(geo);
 465 }
 466
 467 xcb_rectangle_t get_window_rectangle(node_t *n)
 468 {
 469         client_t *c = n->client;
 470         if (c != NULL) {
 471                 xcb_get_geometry_reply_t *g = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, n->id), NULL);
 472                 if (g != NULL) {
 473                         xcb_rectangle_t rect = (xcb_rectangle_t) {g->x, g->y, g->width, g->height};
 474                         free(g);
 475                         return rect;
 476                 }
 477         }
 478         return (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 479 }
 480
 481 bool move_client(coordinates_t *loc, int dx, int dy)
 482 {
 483         node_t *n = loc->node;
 484
 485         if (n == NULL || n->client == NULL) {
 486                 return false;
 487         }
 488
 489         monitor_t *pm = NULL;
 490
 491         if (IS_TILED(n->client)) {
 492                 if (!grabbing) {
 493                         return false;
 494                 }
 495                 xcb_window_t pwin = XCB_NONE;
 496                 query_pointer(&pwin, NULL);
 497                 if (pwin == n->id) {
 498                         return false;
 499                 }
 500                 coordinates_t dst;
 501                 bool is_managed = (pwin != XCB_NONE && locate_window(pwin, &dst));
 502                 if (is_managed && dst.monitor == loc->monitor && IS_TILED(dst.node->client)) {
 503                         swap_nodes(loc->monitor, loc->desktop, n, loc->monitor, loc->desktop, dst.node, false);
 504                         return true;
 505                 } else {
 506                         if (is_managed && dst.monitor == loc->monitor) {
 507                                 return false;
 508                         } else {
 509                                 xcb_point_t pt = {0, 0};
 510                                 query_pointer(NULL, &pt);
 511                                 pm = monitor_from_point(pt);
 512                         }
 513                 }
 514         } else {
 515                 client_t *c = n->client;
 516                 xcb_rectangle_t rect = c->floating_rectangle;
 517                 int16_t x = rect.x + dx;
 518                 int16_t y = rect.y + dy;
 519
 520                 window_move(n->id, x, y);
 521
 522                 c->floating_rectangle.x = x;
 523                 c->floating_rectangle.y = y;
 524                 if (!grabbing) {
 525                         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);
 526                 }
 527                 pm = monitor_from_client(c);
 528         }
 529
 530         if (pm == NULL || pm == loc->monitor) {
 531                 return true;
 532         }
 533
 534         transfer_node(loc->monitor, loc->desktop, n, pm, pm->desk, pm->desk->focus, true);
 535         loc->monitor = pm;
 536         loc->desktop = pm->desk;
 537
 538         return true;
 539 }
 540
 541 bool resize_client(coordinates_t *loc, resize_handle_t rh, int dx, int dy, bool relative)
 542 {
 543         node_t *n = loc->node;
 544         if (n == NULL || n->client == NULL || n->client->state == STATE_FULLSCREEN) {
 545                 return false;
 546         }
 547         node_t *horizontal_fence = NULL, *vertical_fence = NULL;
 548         xcb_rectangle_t rect = get_rectangle(NULL, NULL, n);
 549         uint16_t width = rect.width, height = rect.height;
 550         int16_t x = rect.x, y = rect.y;
 551         if (n->client->state == STATE_TILED) {
 552                 if (rh & HANDLE_LEFT) {
 553                         vertical_fence = find_fence(n, DIR_WEST);
 554                 } else if (rh & HANDLE_RIGHT) {
 555                         vertical_fence = find_fence(n, DIR_EAST);
 556                 }
 557                 if (rh & HANDLE_TOP) {
 558                         horizontal_fence = find_fence(n, DIR_NORTH);
 559                 } else if (rh & HANDLE_BOTTOM) {
 560                         horizontal_fence = find_fence(n, DIR_SOUTH);
 561                 }
 562                 if (vertical_fence == NULL && horizontal_fence == NULL) {
 563                         return false;
 564                 }
 565                 if (vertical_fence != NULL) {
 566                         double sr = 0.0;
 567                         if (relative) {
 568                                 sr = vertical_fence->split_ratio + (double) dx / (double) vertical_fence->rectangle.width;
 569                         } else {
 570                                 sr = (double) (dx - vertical_fence->rectangle.x) / (double) vertical_fence->rectangle.width;
 571                         }
 572                         sr = MAX(0, sr);
 573                         sr = MIN(1, sr);
 574                         vertical_fence->split_ratio = sr;
 575                 }
 576                 if (horizontal_fence != NULL) {
 577                         double sr = 0.0;
 578                         if (relative) {
 579                                 sr = horizontal_fence->split_ratio + (double) dy / (double) horizontal_fence->rectangle.height;
 580                         } else {
 581                                 sr = (double) (dy - horizontal_fence->rectangle.y) / (double) horizontal_fence->rectangle.height;
 582                         }
 583                         sr = MAX(0, sr);
 584                         sr = MIN(1, sr);
 585                         horizontal_fence->split_ratio = sr;
 586                 }
 587                 node_t *target_fence = horizontal_fence != NULL ? horizontal_fence : vertical_fence;
 588                 adjust_ratios(target_fence, target_fence->rectangle);
 589                 arrange(loc->monitor, loc->desktop);
 590         } else {
 591                 int w = width, h = height;
 592                 if (relative) {
 593                         w += dx * (rh & HANDLE_LEFT ? -1 : (rh & HANDLE_RIGHT ? 1 : 0));
 594                         h += dy * (rh & HANDLE_TOP ? -1 : (rh & HANDLE_BOTTOM ? 1 : 0));
 595                 } else {
 596                         if (rh & HANDLE_LEFT) {
 597                                 w = x + width - dx;
 598                         } else if (rh & HANDLE_RIGHT) {
 599                                 w = dx - x;
 600                         }
 601                         if (rh & HANDLE_TOP) {
 602                                 h = y + height - dy;
 603                         } else if (rh & HANDLE_BOTTOM) {
 604                                 h = dy - y;
 605                         }
 606                 }
 607                 width = MAX(1, w);
 608                 height = MAX(1, h);
 609                 apply_size_hints(n->client, &width, &height);
 610                 if (rh & HANDLE_LEFT) {
 611                         x += rect.width - width;
 612                 }
 613                 if (rh & HANDLE_TOP) {
 614                         y += rect.height - height;
 615                 }
 616                 n->client->floating_rectangle = (xcb_rectangle_t) {x, y, width, height};
 617                 if (n->client->state == STATE_FLOATING) {
 618                         window_move_resize(n->id, x, y, width, height);
 619
 620                         if (!grabbing) {
 621                                 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);
 622                         }
 623                 } else {
 624                         arrange(loc->monitor, loc->desktop);
 625                 }
 626         }
 627         return true;
 628 }
 629
 630 /* taken from awesomeWM */
 631 void apply_size_hints(client_t *c, uint16_t *width, uint16_t *height)
 632 {
 633         if (!honor_size_hints) {
 634                 return;
 635         }
 636
 637         int32_t minw = 0, minh = 0;
 638         int32_t basew = 0, baseh = 0, real_basew = 0, real_baseh = 0;
 639
 640         if (c->state == STATE_FULLSCREEN) {
 641                 return;
 642         }
 643
 644         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 645                 basew = c->size_hints.base_width;
 646                 baseh = c->size_hints.base_height;
 647                 real_basew = basew;
 648                 real_baseh = baseh;
 649         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 650                 /* base size is substituted with min size if not specified */
 651                 basew = c->size_hints.min_width;
 652                 baseh = c->size_hints.min_height;
 653         }
 654
 655         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
 656                 minw = c->size_hints.min_width;
 657                 minh = c->size_hints.min_height;
 658         } else if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
 659                 /* min size is substituted with base size if not specified */
 660                 minw = c->size_hints.base_width;
 661                 minh = c->size_hints.base_height;
 662         }
 663
 664         /* Handle the size aspect ratio */
 665         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT &&
 666             c->size_hints.min_aspect_den > 0 &&
 667             c->size_hints.max_aspect_den > 0 &&
 668             *height > real_baseh &&
 669             *width > real_basew) {
 670                 /* ICCCM mandates:
 671                  * If a base size is provided along with the aspect ratio fields, the base size should be subtracted from the
 672                  * window size prior to checking that the aspect ratio falls in range. If a base size is not provided, nothing
 673                  * should be subtracted from the window size. (The minimum size is not to be used in place of the base size for
 674                  * this purpose.)
 675                  */
 676                 double dx = *width - real_basew;
 677                 double dy = *height - real_baseh;
 678                 double ratio = dx / dy;
 679                 double min = c->size_hints.min_aspect_num / (double) c->size_hints.min_aspect_den;
 680                 double max = c->size_hints.max_aspect_num / (double) c->size_hints.max_aspect_den;
 681
 682                 if (max > 0 && min > 0 && ratio > 0) {
 683                         if (ratio < min) {
 684                                 /* dx is lower than allowed, make dy lower to compensate this (+ 0.5 to force proper rounding). */
 685                                 dy = dx / min + 0.5;
 686                                 *width  = dx + real_basew;
 687                                 *height = dy + real_baseh;
 688                         } else if (ratio > max) {
 689                                 /* dx is too high, lower it (+0.5 for proper rounding) */
 690                                 dx = dy * max + 0.5;
 691                                 *width  = dx + real_basew;
 692                                 *height = dy + real_baseh;
 693                         }
 694                 }
 695         }
 696
 697         /* Handle the minimum size */
 698         *width = MAX(*width, minw);
 699         *height = MAX(*height, minh);
 700
 701         /* Handle the maximum size */
 702         if (c->size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MAX_SIZE)
 703         {
 704                 if (c->size_hints.max_width > 0) {
 705                         *width = MIN(*width, c->size_hints.max_width);
 706                 }
 707                 if (c->size_hints.max_height > 0) {
 708                         *height = MIN(*height, c->size_hints.max_height);
 709                 }
 710         }
 711
 712         /* Handle the size increment */
 713         if (c->size_hints.flags & (XCB_ICCCM_SIZE_HINT_P_RESIZE_INC | XCB_ICCCM_SIZE_HINT_BASE_SIZE) &&
 714             c->size_hints.width_inc > 0 && c->size_hints.height_inc > 0) {
 715                 uint16_t t1 = *width, t2 = *height;
 716                 unsigned_subtract(t1, basew);
 717                 unsigned_subtract(t2, baseh);
 718                 *width -= t1 % c->size_hints.width_inc;
 719                 *height -= t2 % c->size_hints.height_inc;
 720         }
 721 }
 722
 723 void query_pointer(xcb_window_t *win, xcb_point_t *pt)
 724 {
 725         if (motion_recorder.enabled) {
 726                 window_hide(motion_recorder.id);
 727         }
 728
 729         xcb_query_pointer_reply_t *qpr = xcb_query_pointer_reply(dpy, xcb_query_pointer(dpy, root), NULL);
 730
 731         if (qpr != NULL) {
 732                 if (win != NULL) {
 733                         if (qpr->child == XCB_NONE) {
 734                                 xcb_point_t mpt = (xcb_point_t) {qpr->root_x, qpr->root_y};
 735                                 monitor_t *m = monitor_from_point(mpt);
 736                                 if (m != NULL) {
 737                                         desktop_t *d = m->desk;
 738                                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 739                                                 if (n->client == NULL && is_inside(mpt, get_rectangle(m, d, n))) {
 740                                                         *win = n->id;
 741                                                         break;
 742                                                 }
 743                                         }
 744                                 }
 745                         } else {
 746                                 *win = qpr->child;
 747                                 xcb_point_t pt = {qpr->root_x, qpr->root_y};
 748                                 for (stacking_list_t *s = stack_tail; s != NULL; s = s->prev) {
 749                                         if (!s->node->client->shown || s->node->hidden) {
 750                                                 continue;
 751                                         }
 752                                         xcb_rectangle_t rect = get_rectangle(NULL, NULL, s->node);
 753                                         if (is_inside(pt, rect)) {
 754                                                 if (s->node->id == qpr->child || is_presel_window(qpr->child)) {
 755                                                         *win = s->node->id;
 756                                                 }
 757                                                 break;
 758                                         }
 759                                 }
 760                         }
 761                 }
 762                 if (pt != NULL) {
 763                         *pt = (xcb_point_t) {qpr->root_x, qpr->root_y};
 764                 }
 765         }
 766
 767         free(qpr);
 768
 769         if (motion_recorder.enabled) {
 770                 window_show(motion_recorder.id);
 771         }
 772 }
 773
 774 void update_motion_recorder(void)
 775 {
 776         xcb_point_t pt;
 777         xcb_window_t win = XCB_NONE;
 778         query_pointer(&win, &pt);
 779         if (win == XCB_NONE) {
 780                 return;
 781         }
 782         monitor_t *m = monitor_from_point(pt);
 783         if (m == NULL) {
 784                 return;
 785         }
 786         desktop_t *d = m->desk;
 787         node_t *n = NULL;
 788         for (n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 789                 if (n->id == win || (n->presel != NULL && n->presel->feedback == win)) {
 790                         break;
 791                 }
 792         }
 793         if ((n != NULL && n != mon->desk->focus) || (n == NULL && m != mon)) {
 794                 enable_motion_recorder(win);
 795         } else {
 796                 disable_motion_recorder();
 797         }
 798 }
 799
 800 void enable_motion_recorder(xcb_window_t win)
 801 {
 802         xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply(dpy, xcb_get_geometry(dpy, win), NULL);
 803         if (geo != NULL) {
 804                 uint16_t width = geo->width + 2 * geo->border_width;
 805                 uint16_t height = geo->height + 2 * geo->border_width;
 806                 window_move_resize(motion_recorder.id, geo->x, geo->y, width, height);
 807                 window_above(motion_recorder.id, win);
 808                 window_show(motion_recorder.id);
 809                 motion_recorder.enabled = true;
 810         }
 811         free(geo);
 812 }
 813
 814 void disable_motion_recorder(void)
 815 {
 816         if (!motion_recorder.enabled) {
 817                 return;
 818         }
 819         window_hide(motion_recorder.id);
 820         motion_recorder.enabled = false;
 821 }
 822
 823 void window_border_width(xcb_window_t win, uint32_t bw)
 824 {
 825         uint32_t values[] = {bw};
 826         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_BORDER_WIDTH, values);
 827 }
 828
 829 void window_move(xcb_window_t win, int16_t x, int16_t y)
 830 {
 831         uint32_t values[] = {x, y};
 832         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y, values);
 833 }
 834
 835 void window_resize(xcb_window_t win, uint16_t w, uint16_t h)
 836 {
 837         uint32_t values[] = {w, h};
 838         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_WIDTH_HEIGHT, values);
 839 }
 840
 841 void window_move_resize(xcb_window_t win, int16_t x, int16_t y, uint16_t w, uint16_t h)
 842 {
 843         uint32_t values[] = {x, y, w, h};
 844         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_X_Y_WIDTH_HEIGHT, values);
 845 }
 846
 847 void window_center(monitor_t *m, client_t *c)
 848 {
 849         xcb_rectangle_t *r = &c->floating_rectangle;
 850         xcb_rectangle_t a = m->rectangle;
 851         if (r->width >= a.width) {
 852                 r->x = a.x;
 853         } else {
 854                 r->x = a.x + (a.width - r->width) / 2;
 855         }
 856         if (r->height >= a.height) {
 857                 r->y = a.y;
 858         } else {
 859                 r->y = a.y + (a.height - r->height) / 2;
 860         }
 861         r->x -= c->border_width;
 862         r->y -= c->border_width;
 863 }
 864
 865 void window_stack(xcb_window_t w1, xcb_window_t w2, uint32_t mode)
 866 {
 867         if (w2 == XCB_NONE) {
 868                 return;
 869         }
 870         uint16_t mask = XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE;
 871         uint32_t values[] = {w2, mode};
 872         xcb_configure_window(dpy, w1, mask, values);
 873 }
 874
 875 /* Stack w1 above w2 */
 876 void window_above(xcb_window_t w1, xcb_window_t w2)
 877 {
 878         window_stack(w1, w2, XCB_STACK_MODE_ABOVE);
 879 }
 880
 881 /* Stack w1 below w2 */
 882 void window_below(xcb_window_t w1, xcb_window_t w2)
 883 {
 884         window_stack(w1, w2, XCB_STACK_MODE_BELOW);
 885 }
 886
 887 void window_lower(xcb_window_t win)
 888 {
 889         uint32_t values[] = {XCB_STACK_MODE_BELOW};
 890         xcb_configure_window(dpy, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
 891 }
 892
 893 void window_set_visibility(xcb_window_t win, bool visible)
 894 {
 895         uint32_t values_off[] = {ROOT_EVENT_MASK & ~XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY};
 896         uint32_t values_on[] = {ROOT_EVENT_MASK};
 897         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_off);
 898         if (visible) {
 899                 set_window_state(win, XCB_ICCCM_WM_STATE_NORMAL);
 900                 xcb_map_window(dpy, win);
 901         } else {
 902                 xcb_unmap_window(dpy, win);
 903                 set_window_state(win, XCB_ICCCM_WM_STATE_ICONIC);
 904         }
 905         xcb_change_window_attributes(dpy, root, XCB_CW_EVENT_MASK, values_on);
 906 }
 907
 908 void window_hide(xcb_window_t win)
 909 {
 910         window_set_visibility(win, false);
 911 }
 912
 913 void window_show(xcb_window_t win)
 914 {
 915         window_set_visibility(win, true);
 916 }
 917
 918 void update_input_focus(void)
 919 {
 920         set_input_focus(mon->desk->focus);
 921 }
 922
 923 void set_input_focus(node_t *n)
 924 {
 925         if (n == NULL || n->client == NULL) {
 926                 clear_input_focus();
 927         } else {
 928                 if (n->client->icccm_props.input_hint) {
 929                         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_PARENT, n->id, XCB_CURRENT_TIME);
 930                 } else if (n->client->icccm_props.take_focus) {
 931                         send_client_message(n->id, ewmh->WM_PROTOCOLS, WM_TAKE_FOCUS);
 932                 }
 933         }
 934 }
 935
 936 void clear_input_focus(void)
 937 {
 938         xcb_set_input_focus(dpy, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 939 }
 940
 941 void center_pointer(xcb_rectangle_t r)
 942 {
 943         if (grabbing) {
 944                 return;
 945         }
 946         int16_t cx = r.x + r.width / 2;
 947         int16_t cy = r.y + r.height / 2;
 948         xcb_warp_pointer(dpy, XCB_NONE, root, 0, 0, 0, 0, cx, cy);
 949 }
 950
 951 void get_atom(char *name, xcb_atom_t *atom)
 952 {
 953         xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(dpy, xcb_intern_atom(dpy, 0, strlen(name), name), NULL);
 954         if (reply != NULL) {
 955                 *atom = reply->atom;
 956         } else {
 957                 *atom = XCB_NONE;
 958         }
 959         free(reply);
 960 }
 961
 962 void set_atom(xcb_window_t win, xcb_atom_t atom, uint32_t value)
 963 {
 964         xcb_change_property(dpy, XCB_PROP_MODE_REPLACE, win, atom, XCB_ATOM_CARDINAL, 32, 1, &value);
 965 }
 966
 967 void send_client_message(xcb_window_t win, xcb_atom_t property, xcb_atom_t value)
 968 {
 969         xcb_client_message_event_t *e = calloc(32, 1);
 970
 971         e->response_type = XCB_CLIENT_MESSAGE;
 972         e->window = win;
 973         e->type = property;
 974         e->format = 32;
 975         e->data.data32[0] = value;
 976         e->data.data32[1] = XCB_CURRENT_TIME;
 977
 978         xcb_send_event(dpy, false, win, XCB_EVENT_MASK_NO_EVENT, (char *) e);
 979         xcb_flush(dpy);
 980         free(e);
 981 }
 982
 983 bool window_exists(xcb_window_t win)
 984 {
 985         xcb_generic_error_t *err;
 986         free(xcb_query_tree_reply(dpy, xcb_query_tree(dpy, win), &err));
 987
 988         if (err != NULL) {
 989                 free(err);
 990                 return false;
 991         }
 992
 993         return true;
 994 }