git.sur5r.net Git - i3/i3/blob - src/handlers.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdio.h>
  12 #include <assert.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <xcb/xcb.h>
  16
  17 #include <xcb/xcb_wm.h>
  18 #include <xcb/xcb_icccm.h>
  19 #include <X11/XKBlib.h>
  20
  21 #include "i3.h"
  22 #include "debug.h"
  23 #include "table.h"
  24 #include "layout.h"
  25 #include "commands.h"
  26 #include "data.h"
  27 #include "xcb.h"
  28 #include "util.h"
  29 #include "xinerama.h"
  30 #include "config.h"
  31
  32 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
  33    since it’d trigger an infinite loop of switching between the different windows when
  34    changing workspaces */
  35 int ignore_notify_event = -1;
  36
  37 /*
  38  * Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
  39  * Therefore, we just replay all key presses.
  40  *
  41  */
  42 int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
  43         LOG("got key release, just passing\n");
  44         xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
  45         xcb_flush(conn);
  46         return 1;
  47 }
  48
  49 /*
  50  * There was a key press. We compare this key code with our bindings table and pass
  51  * the bound action to parse_command().
  52  *
  53  */
  54 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
  55         LOG("Keypress %d\n", event->detail);
  56
  57         /* We need to get the keysym group (There are group 1 to group 4, each holding
  58            two keysyms (without shift and with shift) using Xkb because X fails to
  59            provide them reliably (it works in Xephyr, it does not in real X) */
  60         XkbStateRec state;
  61         if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
  62                 event->state |= 0x2;
  63
  64         LOG("state %d\n", event->state);
  65
  66         /* Remove the numlock bit, all other bits are modifiers we can bind to */
  67         uint16_t state_filtered = event->state & ~XCB_MOD_MASK_LOCK;
  68
  69         /* Find the binding */
  70         Binding *bind;
  71         TAILQ_FOREACH(bind, &bindings, bindings)
  72                 if (bind->keycode == event->detail && bind->mods == state_filtered)
  73                         break;
  74
  75         /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
  76            the user did not press Mode_switch, so just pass it… */
  77         if (bind == TAILQ_END(&bindings)) {
  78                 xcb_allow_events(conn, ReplayKeyboard, event->time);
  79                 xcb_flush(conn);
  80                 return 1;
  81         }
  82
  83         parse_command(conn, bind->command);
  84         if (event->state & 0x2) {
  85                 LOG("Mode_switch -> allow_events(SyncKeyboard)\n");
  86                 xcb_allow_events(conn, SyncKeyboard, event->time);
  87                 xcb_flush(conn);
  88         }
  89         return 1;
  90 }
  91
  92
  93 /*
  94  * When the user moves the mouse pointer onto a window, this callback gets called.
  95  *
  96  */
  97 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
  98         LOG("enter_notify for %08x, serial %d\n", event->event, event->sequence);
  99         /* Some events are not interesting, because they were not generated actively by the
 100            user, but be reconfiguration of windows */
 101         if (event->sequence == ignore_notify_event) {
 102                 LOG("Ignoring, because of previous map\n");
 103                 return 1;
 104         }
 105
 106         /* This was either a focus for a client’s parent (= titlebar)… */
 107         Client *client = table_get(byParent, event->event);
 108         /* …or the client itself */
 109         if (client == NULL)
 110                 client = table_get(byChild, event->event);
 111
 112         /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
 113         if (client == NULL) {
 114                 LOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
 115                 i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
 116                 if (screen == NULL) {
 117                         LOG("ERROR: No such screen\n");
 118                         return 0;
 119                 }
 120                 c_ws = &workspaces[screen->current_workspace];
 121                 LOG("We're now on virtual screen number %d\n", screen->num);
 122                 return 1;
 123         }
 124
 125         set_focus(conn, client);
 126
 127         return 1;
 128 }
 129
 130 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 131         LOG("button press!\n");
 132         /* This was either a focus for a client’s parent (= titlebar)… */
 133         Client *client = table_get(byChild, event->event);
 134         bool border_click = false;
 135         if (client == NULL) {
 136                 client = table_get(byParent, event->event);
 137                 border_click = true;
 138         }
 139         if (client == NULL) {
 140                 /* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
 141                 struct Stack_Window *stack_win;
 142                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 143                         if (stack_win->window == event->event) {
 144                                 /* A stack window was clicked. We calculate the destination client by
 145                                    dividing the Y position of the event through the height of a window
 146                                    decoration and then set the focus to this client. */
 147                                 i3Font *font = load_font(conn, config.font);
 148                                 int decoration_height = (font->height + 2 + 2);
 149                                 int destination = (event->event_y / decoration_height),
 150                                     c = 0;
 151                                 Client *client;
 152
 153                                 LOG("Click on stack_win for client %d\n", destination);
 154                                 CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
 155                                         if (c++ == destination) {
 156                                                 set_focus(conn, client);
 157                                                 return 1;
 158                                         }
 159
 160                                 return 1;
 161                         }
 162
 163                 return 1;
 164         }
 165
 166         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 167         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 168
 169         /* Set focus in any case */
 170         set_focus(conn, client);
 171
 172         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 173         LOG("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 174
 175         Container *con = client->container,
 176                   *first = NULL,
 177                   *second = NULL;
 178         enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
 179
 180         if (con == NULL) {
 181                 LOG("dock. done.\n");
 182                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 183                 xcb_flush(conn);
 184                 return 1;
 185         }
 186
 187         LOG("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 188
 189         if (!border_click) {
 190                 LOG("client. done.\n");
 191                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 192                 xcb_flush(conn);
 193                 return 1;
 194         }
 195
 196         if (event->event_y < 2) {
 197                 /* This was a press on the top border */
 198                 if (con->row == 0)
 199                         return 1;
 200                 first = con->workspace->table[con->col][con->row-1];
 201                 second = con;
 202                 orientation = O_HORIZONTAL;
 203         } else if (event->event_y >= (client->rect.height - 2)) {
 204                 /* …bottom border */
 205                 if (con->row == (con->workspace->rows-1))
 206                         return 1;
 207                 first = con;
 208                 second = con->workspace->table[con->col][con->row+1];
 209                 orientation = O_HORIZONTAL;
 210         } else if (event->event_x <= 2) {
 211                 /* …left border */
 212                 if (con->col == 0)
 213                         return 1;
 214                 first = con->workspace->table[con->col-1][con->row];
 215                 second = con;
 216         } else if (event->event_x > 2) {
 217                 /* …right border */
 218                 if (con->col == (con->workspace->cols-1))
 219                         return 1;
 220                 first = con;
 221                 second = con->workspace->table[con->col+1][con->row];
 222         }
 223
 224         /* Open a new window, the resizebar. Grab the pointer and move the window around
 225            as the user moves the pointer. */
 226         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
 227         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, 0, NULL);
 228
 229         Rect helprect;
 230         if (orientation == O_VERTICAL) {
 231                 helprect.x = event->root_x;
 232                 helprect.y = 0;
 233                 helprect.width = 2;
 234                 helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
 235         } else {
 236                 helprect.x = 0;
 237                 helprect.y = event->root_y;
 238                 helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width */
 239                 helprect.height = 2;
 240         }
 241         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 242                                              (orientation == O_VERTICAL ?
 243                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
 244                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), 0, NULL);
 245
 246         uint32_t values[1] = {get_colorpixel(conn, "#4c7899")};
 247         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 248         check_error(conn, cookie, "Could not change window attributes (background color)");
 249
 250         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 251
 252         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 253                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 254
 255         xcb_flush(conn);
 256
 257         xcb_generic_event_t *inside_event;
 258         /* I’ve always wanted to have my own eventhandler… */
 259         while ((inside_event = xcb_wait_for_event(conn))) {
 260                 /* Same as get_event_handler in xcb */
 261                 int nr = inside_event->response_type;
 262                 if (nr == 0) {
 263                         /* An error occured */
 264                         handle_event(NULL, conn, inside_event);
 265                         free(inside_event);
 266                         continue;
 267                 }
 268                 assert(nr < 256);
 269                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 270                 assert(nr >= 2);
 271
 272                 /* Check if we need to escape this loop */
 273                 if (nr == XCB_BUTTON_RELEASE)
 274                         break;
 275
 276                 switch (nr) {
 277                         case XCB_MOTION_NOTIFY:
 278                                 if (orientation == O_VERTICAL) {
 279                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 280                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 281                                 } else {
 282                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 283                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 284                                 }
 285
 286                                 xcb_flush(conn);
 287                                 break;
 288                         case XCB_EXPOSE:
 289                                 /* Use original handler */
 290                                 xcb_event_handle(&evenths, inside_event);
 291                                 break;
 292                         default:
 293                                 LOG("Ignoring event of type %d\n", nr);
 294                                 break;
 295                 }
 296                 free(inside_event);
 297         }
 298
 299         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 300         xcb_destroy_window(conn, helpwin);
 301         xcb_destroy_window(conn, grabwin);
 302         xcb_flush(conn);
 303
 304         Workspace *ws = con->workspace;
 305         if (orientation == O_VERTICAL) {
 306                 LOG("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 307
 308                 /* Convert 0 (for default width_factor) to actual numbers */
 309                 if (first->width_factor == 0)
 310                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 311                 if (second->width_factor == 0)
 312                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 313
 314                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 315                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 316         } else {
 317                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 318
 319                 /* Convert 0 (for default height_factor) to actual numbers */
 320                 if (first->height_factor == 0)
 321                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 322                 if (second->height_factor == 0)
 323                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 324
 325                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 326                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 327         }
 328
 329         render_layout(conn);
 330
 331         return 1;
 332 }
 333
 334 /*
 335  * A new window appeared on the screen (=was mapped), so let’s manage it.
 336  *
 337  */
 338 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 339         window_attributes_t wa = { TAG_VALUE };
 340         wa.u.override_redirect = event->override_redirect;
 341         LOG("MapNotify for 0x%08x, serial is %d.\n", event->window, event->sequence);
 342         LOG("setting ignore_notify_event = %d\n", event->sequence);
 343         ignore_notify_event = event->sequence;
 344         manage_window(prophs, conn, event->window, wa);
 345         return 1;
 346 }
 347
 348 /*
 349  * Configuration notifies are only handled because we need to set up ignore for the following
 350  * enter notify events
 351  *
 352  */
 353 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
 354         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 355
 356         LOG("handle_configure_event\n");
 357         LOG("event->type = %d, \n", event->response_type);
 358         LOG("event->x = %d, ->y = %d, ->width = %d, ->height = %d\n", event->x, event->y, event->width, event->height);
 359         LOG("sequence = %d\n", event->sequence);
 360
 361         ignore_notify_event = event->sequence;
 362
 363         if (event->event == root) {
 364                 LOG("reconfigure of the root window, need to xinerama\n");
 365                 /* FIXME: Somehow, this is occuring too often. Therefore, we check for 0/0,
 366                    but is there a better way? */
 367                 if (event->x == 0 && event->y == 0)
 368                         xinerama_requery_screens(conn);
 369                 return 1;
 370         }
 371
 372         Client *client = table_get(byChild, event->window);
 373         if (client == NULL) {
 374                 LOG("client not managed, ignoring\n");
 375                 return 1;
 376         }
 377
 378         if (client->fullscreen) {
 379                 LOG("client in fullscreen, not touching\n");
 380                 return 1;
 381         }
 382
 383         /* Let’s see if the application has changed size/position on its own *sigh*… */
 384         if ((event->x != client->child_rect.x) ||
 385             (event->y != client->child_rect.y) ||
 386             (event->width != client->child_rect.width) ||
 387             (event->height != client->child_rect.height)) {
 388                 /* Who is your window manager? Who’s that, huh? I AM YOUR WINDOW MANAGER! */
 389                 LOG("Application wanted to resize itself. Fixed that.\n");
 390                 client->force_reconfigure = true;
 391                 render_container(conn, client->container);
 392                 xcb_flush(conn);
 393         }
 394
 395         return 1;
 396 }
 397
 398 /*
 399  * Our window decorations were unmapped. That means, the window will be killed now,
 400  * so we better clean up before.
 401  *
 402  */
 403 int handle_unmap_notify_event(void *data, xcb_connection_t *conn, xcb_unmap_notify_event_t *event) {
 404         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 405
 406         LOG("setting ignore_notify_event = %d\n", event->sequence);
 407
 408         ignore_notify_event = event->sequence;
 409
 410         Client *client = table_get(byChild, event->window);
 411         /* First, we need to check if the client is awaiting an unmap-request which
 412            was generated by us reparenting the window. In that case, we just ignore it. */
 413         if (client != NULL && client->awaiting_useless_unmap) {
 414                 LOG("Dropping this unmap request, it was generated by reparenting\n");
 415                 client->awaiting_useless_unmap = false;
 416                 return 1;
 417         }
 418         client = table_remove(byChild, event->window);
 419
 420         LOG("UnmapNotify for 0x%08x (received from 0x%08x): ", event->window, event->event);
 421         if (client == NULL) {
 422                 LOG("not a managed window. Ignoring.\n");
 423                 return 0;
 424         }
 425
 426         if (client->name != NULL)
 427                 free(client->name);
 428
 429         if (client->container != NULL) {
 430                 Container *con = client->container;
 431
 432                 /* If this was the fullscreen client, we need to unset it */
 433                 if (client->fullscreen)
 434                         con->workspace->fullscreen_client = NULL;
 435
 436                 /* If the container will be empty now and is in stacking mode, we need to
 437                    correctly resize the stack_win */
 438                 if (CIRCLEQ_EMPTY(&(con->clients)) && con->mode == MODE_STACK) {
 439                         struct Stack_Window *stack_win = &(con->stack_win);
 440                         stack_win->rect.height = 0;
 441                         xcb_unmap_window(conn, stack_win->window);
 442                 }
 443
 444                 /* Remove the client from the list of clients */
 445                 CIRCLEQ_REMOVE(&(con->clients), client, clients);
 446
 447                 /* Remove from the focus stack */
 448                 LOG("Removing from focus stack\n");
 449                 SLIST_REMOVE(&(con->workspace->focus_stack), client, Client, focus_clients);
 450
 451                 /* Set currently_focused to the next client which will get focus in this
 452                    particular container. This does not necessarily correspond with the client
 453                    that will be focused next */
 454                 con->currently_focused = NULL;
 455                 Client *focus_client;
 456                 SLIST_FOREACH(focus_client, &(con->workspace->focus_stack), focus_clients)
 457                         if (focus_client->container == con) {
 458                                 con->currently_focused = focus_client;
 459                                 break;
 460                         }
 461
 462                 /* Actually set focus, if there is a window which should get it */
 463                 if (!SLIST_EMPTY(&(con->workspace->focus_stack)))
 464                         set_focus(conn, SLIST_FIRST(&(con->workspace->focus_stack)));
 465         }
 466
 467         LOG("child of 0x%08x.\n", client->frame);
 468         xcb_reparent_window(conn, client->child, root, 0, 0);
 469         xcb_destroy_window(conn, client->frame);
 470         xcb_flush(conn);
 471         table_remove(byParent, client->frame);
 472
 473         cleanup_table(conn, client->container->workspace);
 474
 475         free(client);
 476
 477         render_layout(conn);
 478
 479         return 1;
 480 }
 481
 482 /*
 483  * Called when a window changes its title
 484  *
 485  */
 486 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 487                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 488         LOG("window's name changed.\n");
 489         Client *client = table_get(byChild, window);
 490         if (client == NULL)
 491                 return 1;
 492
 493         if (client->name != NULL)
 494                 free(client->name);
 495
 496         client->name_len = xcb_get_property_value_length(prop);
 497         client->name = smalloc(client->name_len);
 498         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 499         LOG("rename to \"%.*s\".\n", client->name_len, client->name);
 500
 501         if (client->container->mode == MODE_STACK)
 502                 render_container(conn, client->container);
 503         else decorate_window(conn, client, client->frame, client->titlegc, 0);
 504         xcb_flush(conn);
 505
 506         return 1;
 507 }
 508
 509 /*
 510  * Expose event means we should redraw our windows (= title bar)
 511  *
 512  */
 513 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *event) {
 514         /* event->count is the number of minimum remaining expose events for this window, so we
 515            skip all events but the last one */
 516         if (event->count != 0)
 517                 return 1;
 518
 519         Client *client = table_get(byParent, event->window);
 520         if (client == NULL) {
 521                 /* There was no client in the table, so this is probably an expose event for
 522                    one of our stack_windows. */
 523                 struct Stack_Window *stack_win;
 524                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 525                         if (stack_win->window == event->window) {
 526                                 render_container(conn, stack_win->container);
 527                                 return 1;
 528                         }
 529                 return 1;
 530         }
 531
 532         LOG("handle_expose_event()\n");
 533         if (client->container->mode != MODE_STACK)
 534                 decorate_window(conn, client, client->frame, client->titlegc, 0);
 535         else {
 536                 uint32_t background_color;
 537                 /* Distinguish if the window is currently focused… */
 538                 if (CUR_CELL->currently_focused == client)
 539                         background_color = get_colorpixel(conn, "#285577");
 540                 /* …or if it is the focused window in a not focused container */
 541                 else background_color = get_colorpixel(conn, "#555555");
 542
 543                 /* Set foreground color to current focused color, line width to 2 */
 544                 uint32_t values[] = {background_color, 2};
 545                 xcb_change_gc(conn, client->titlegc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
 546
 547                 /* Draw the border, the ±1 is for line width = 2 */
 548                 xcb_point_t points[] = {{1, 0},                                           /* left upper edge */
 549                                         {1, client->rect.height-1},                       /* left bottom edge */
 550                                         {client->rect.width-1, client->rect.height-1},    /* right bottom edge */
 551                                         {client->rect.width-1, 0}};                       /* right upper edge */
 552                 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, client->frame, client->titlegc, 4, points);
 553
 554                 /* Draw a black background */
 555                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
 556                 xcb_rectangle_t crect = {2, 0, client->rect.width - (2 + 2), client->rect.height - 2};
 557                 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
 558
 559                 xcb_flush(conn);
 560         }
 561         return 1;
 562 }
 563
 564 /*
 565  * Handle client messages (EWMH)
 566  *
 567  */
 568 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 569         LOG("client_message\n");
 570
 571         if (event->type == atoms[_NET_WM_STATE]) {
 572                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 573                         return 0;
 574
 575                 LOG("fullscreen\n");
 576
 577                 Client *client = table_get(byChild, event->window);
 578                 if (client == NULL)
 579                         return 0;
 580
 581                 /* Check if the fullscreen state should be toggled */
 582                 if ((client->fullscreen &&
 583                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 584                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 585                     (!client->fullscreen &&
 586                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 587                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 588                         toggle_fullscreen(conn, client);
 589         } else {
 590                 LOG("unhandled clientmessage\n");
 591                 return 0;
 592         }
 593
 594         return 1;
 595 }
 596
 597 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 598                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 599         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 600          before changing this property. */
 601         LOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 602         return 0;
 603 }
 604
 605 /*
 606  * Handles the size hints set by a window, but currently only the part necessary for displaying
 607  * clients proportionally inside their frames (mplayer for example)
 608  *
 609  * See ICCCM 4.1.2.3 for more details
 610  *
 611  */
 612 int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 613                         xcb_atom_t name, xcb_get_property_reply_t *reply) {
 614         LOG("handle_normal_hints\n");
 615         Client *client = table_get(byChild, window);
 616         if (client == NULL) {
 617                 LOG("No such client\n");
 618                 return;
 619         }
 620         xcb_size_hints_t size_hints;
 621
 622         /* If the hints were already in this event, use them, if not, request them */
 623         if (reply != NULL)
 624                 xcb_get_wm_size_hints_from_reply(&size_hints, reply);
 625         else
 626                 xcb_get_wm_normal_hints_reply(conn, xcb_get_wm_normal_hints_unchecked(conn, client->child), &size_hints, NULL);
 627
 628         /* If no aspect ratio was set or if it was invalid, we ignore the hints */
 629         if (!(size_hints.flags & XCB_SIZE_HINT_P_ASPECT) ||
 630             (size_hints.min_aspect_num <= 0) ||
 631             (size_hints.min_aspect_den <= 0)) {
 632                 LOG("No aspect ratio set, ignoring\n");
 633                 return;
 634         }
 635
 636         LOG("window is %08x / %s\n", client->child, client->name);
 637
 638         int base_width = 0, base_height = 0,
 639             min_width = 0, min_height = 0;
 640
 641         /* base_width/height are the desired size of the window.
 642            We check if either the program-specified size or the program-specified
 643            min-size is available */
 644         if (size_hints.flags & XCB_SIZE_HINT_P_SIZE) {
 645                 base_width = size_hints.base_width;
 646                 base_height = size_hints.base_height;
 647         } else if (size_hints.flags & XCB_SIZE_HINT_P_MIN_SIZE) {
 648                 base_width = size_hints.min_width;
 649                 base_height = size_hints.min_height;
 650         }
 651
 652         if (size_hints.flags & XCB_SIZE_HINT_P_MIN_SIZE) {
 653                 min_width = size_hints.min_width;
 654                 min_height = size_hints.min_height;
 655         } else if (size_hints.flags & XCB_SIZE_HINT_P_SIZE) {
 656                 min_width = size_hints.base_width;
 657                 min_height = size_hints.base_height;
 658         }
 659
 660         double width = client->rect.width - base_width;
 661         double height = client->rect.height - base_height;
 662         /* Convert numerator/denominator to a double */
 663         double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
 664         double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
 665
 666         LOG("min_aspect = %f, max_aspect = %f\n", min_aspect, max_aspect);
 667         LOG("width = %f, height = %f\n", width, height);
 668
 669         /* Sanity checks, this is user-input, in a way */
 670         if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
 671                 return;
 672
 673         /* Check if we need to set proportional_* variables using the correct ratio */
 674         if ((width / height) < min_aspect) {
 675                 client->proportional_width = width;
 676                 client->proportional_height = width / min_aspect;
 677         } else if ((width / height) > max_aspect) {
 678                 client->proportional_width = width;
 679                 client->proportional_height = width / max_aspect;
 680         } else return;
 681
 682         client->force_reconfigure = true;
 683
 684         if (client->container != NULL) {
 685                 render_container(conn, client->container);
 686                 xcb_flush(conn);
 687         }
 688 }