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