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 "font.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         printf("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         printf("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         printf("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                 printf("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         printf("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                 printf("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                 printf("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                         printf("ERROR: No such screen\n");
 118                         return 0;
 119                 }
 120                 c_ws = &workspaces[screen->current_workspace];
 121                 printf("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         printf("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                                 printf("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         printf("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                 printf("dock. done.\n");
 182                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 183                 xcb_flush(conn);
 184                 return 1;
 185         }
 186
 187         printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 188
 189         if (!border_click) {
 190                 printf("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, 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, 0, NULL);
 242
 243         uint32_t values[1] = {get_colorpixel(conn, NULL, helpwin, "#4c7899")};
 244         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 245         check_error(conn, cookie, "Could not change window attributes (background color)");
 246
 247         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 248
 249         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 250                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 251
 252         xcb_flush(conn);
 253
 254         xcb_generic_event_t *inside_event;
 255         /* I’ve always wanted to have my own eventhandler… */
 256         while ((inside_event = xcb_wait_for_event(conn))) {
 257                 /* Same as get_event_handler in xcb */
 258                 int nr = inside_event->response_type;
 259                 if (nr == 0) {
 260                         /* An error occured */
 261                         handle_event(NULL, conn, inside_event);
 262                         free(inside_event);
 263                         continue;
 264                 }
 265                 assert(nr < 256);
 266                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 267                 assert(nr >= 2);
 268
 269                 /* Check if we need to escape this loop */
 270                 if (nr == XCB_BUTTON_RELEASE)
 271                         break;
 272
 273                 switch (nr) {
 274                         case XCB_MOTION_NOTIFY:
 275                                 if (orientation == O_VERTICAL) {
 276                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 277                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 278                                 } else {
 279                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 280                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 281                                 }
 282
 283                                 xcb_flush(conn);
 284                                 break;
 285                         case XCB_EXPOSE:
 286                                 /* Use original handler */
 287                                 xcb_event_handle(&evenths, inside_event);
 288                                 break;
 289                         default:
 290                                 printf("Ignoring event of type %d\n", nr);
 291                                 break;
 292                 }
 293                 free(inside_event);
 294         }
 295
 296         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 297         xcb_destroy_window(conn, helpwin);
 298         xcb_destroy_window(conn, grabwin);
 299         xcb_flush(conn);
 300
 301         Workspace *ws = con->workspace;
 302         if (orientation == O_VERTICAL) {
 303                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 304
 305                 /* Convert 0 (for default width_factor) to actual numbers */
 306                 if (first->width_factor == 0)
 307                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 308                 if (second->width_factor == 0)
 309                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 310
 311                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 312                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 313         } else {
 314                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 315
 316                 /* Convert 0 (for default height_factor) to actual numbers */
 317                 if (first->height_factor == 0)
 318                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 319                 if (second->height_factor == 0)
 320                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 321
 322                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 323                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 324         }
 325
 326         render_layout(conn);
 327
 328         return 1;
 329 }
 330
 331 /*
 332  * A new window appeared on the screen (=was mapped), so let’s manage it.
 333  *
 334  */
 335 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 336         window_attributes_t wa = { TAG_VALUE };
 337         wa.u.override_redirect = event->override_redirect;
 338         printf("MapNotify for 0x%08x, serial is %d.\n", event->window, event->sequence);
 339         ignore_notify_event = event->sequence;
 340         manage_window(prophs, conn, event->window, wa);
 341         return 1;
 342 }
 343
 344 /*
 345  * Configuration notifies are only handled because we need to set up ignore for the following
 346  * enter notify events
 347  *
 348  */
 349 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
 350         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 351
 352         printf("handle_configure_event\n");
 353         printf("event->x = %d, ->y = %d, ->width = %d, ->height = %d\n", event->x, event->y, event->width, event->height);
 354         if (event->event == root) {
 355                 printf("reconfigure of the root window, need to xinerama\n");
 356                 xinerama_requery_screens(conn);
 357                 return 1;
 358         }
 359
 360         ignore_notify_event = event->sequence;
 361
 362         Client *client = table_get(byChild, event->window);
 363         if (client == NULL) {
 364                 printf("client not managed, ignoring\n");
 365                 return 1;
 366         }
 367
 368         if (client->fullscreen) {
 369                 printf("client in fullscreen, not touching\n");
 370                 return 1;
 371         }
 372
 373         /* Let’s see if the application has changed size/position on its own *sigh*… */
 374         if ((event->x != client->child_rect.x) ||
 375             (event->y != client->child_rect.y) ||
 376             (event->width != client->child_rect.width) ||
 377             (event->height != client->child_rect.height)) {
 378                 /* Who is your window manager? Who’s that, huh? I AM YOUR WINDOW MANAGER! */
 379                 printf("Application wanted to resize itself. Fixed that.\n");
 380                 client->force_reconfigure = true;
 381                 render_container(conn, client->container);
 382                 xcb_flush(conn);
 383         }
 384
 385         return 1;
 386 }
 387
 388 /*
 389  * Our window decorations were unmapped. That means, the window will be killed now,
 390  * so we better clean up before.
 391  *
 392  */
 393 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 394         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 395
 396         ignore_notify_event = e->sequence;
 397
 398         Client *client = table_get(byChild, e->window);
 399         /* First, we need to check if the client is awaiting an unmap-request which
 400            was generated by us reparenting the window. In that case, we just ignore it. */
 401         if (client != NULL && client->awaiting_useless_unmap) {
 402                 printf("Dropping this unmap request, it was generated by reparenting\n");
 403                 client->awaiting_useless_unmap = false;
 404                 return 1;
 405         }
 406         client = table_remove(byChild, e->window);
 407
 408         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 409         if (client == NULL) {
 410                 printf("not a managed window. Ignoring.\n");
 411                 return 0;
 412         }
 413
 414         if (client->container != NULL) {
 415                 Client *to_focus = NULL;
 416                 Container *con = client->container;
 417
 418                 /* If the client which is being unmapped was the currently active, we need to find
 419                    the next possible window to focus in this container */
 420                 if (con->currently_focused == client) {
 421                         to_focus = CIRCLEQ_NEXT_OR_NULL(&(con->clients), client, clients);
 422                         if (to_focus == NULL)
 423                                 to_focus = CIRCLEQ_PREV_OR_NULL(&(con->clients), client, clients);
 424
 425                         /* Set focus in data structure to the next/previous window, if any (else NULL) */
 426                         con->currently_focused = to_focus;
 427                 }
 428
 429                 /* If this was the fullscreen client, we need to unset it */
 430                 if (client->fullscreen)
 431                         con->workspace->fullscreen_client = NULL;
 432
 433                 /* If the container will be empty now and is in stacking mode, we need to
 434                    correctly resize the stack_win */
 435                 if (con->currently_focused == NULL && con->mode == MODE_STACK) {
 436                         struct Stack_Window *stack_win = &(con->stack_win);
 437                         stack_win->height = 0;
 438                         xcb_unmap_window(c, stack_win->window);
 439                 }
 440
 441                 /* Remove the client from the list of clients */
 442                 CIRCLEQ_REMOVE(&(con->clients), client, clients);
 443
 444                 /* Actually set focus, if there is a window which should get it */
 445                 if (to_focus != NULL)
 446                         set_focus(c, to_focus);
 447         }
 448
 449         printf("child of 0x%08x.\n", client->frame);
 450         xcb_reparent_window(c, client->child, root, 0, 0);
 451         xcb_destroy_window(c, client->frame);
 452         xcb_flush(c);
 453         table_remove(byParent, client->frame);
 454
 455         cleanup_table(c, client->container->workspace);
 456
 457         free(client);
 458
 459         render_layout(c);
 460
 461         return 1;
 462 }
 463
 464 /*
 465  * Called when a window changes its title
 466  *
 467  */
 468 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 469                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 470         printf("window's name changed.\n");
 471         Client *client = table_get(byChild, window);
 472         if (client == NULL)
 473                 return 1;
 474
 475         client->name_len = xcb_get_property_value_length(prop);
 476         client->name = malloc(client->name_len);
 477         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 478         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 479
 480         if (client->container->mode == MODE_STACK)
 481                 render_container(conn, client->container);
 482         else decorate_window(conn, client, client->frame, client->titlegc, 0);
 483         xcb_flush(conn);
 484
 485         return 1;
 486 }
 487
 488 /*
 489  * Expose event means we should redraw our windows (= title bar)
 490  *
 491  */
 492 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 493         printf("got expose_event\n");
 494         /* e->count is the number of minimum remaining expose events for this window, so we
 495            skip all events but the last one */
 496         if (e->count != 0)
 497                 return 1;
 498
 499         Client *client = table_get(byParent, e->window);
 500         if (client == NULL) {
 501                 /* There was no client in the table, so this is probably an expose event for
 502                    one of our stack_windows. */
 503                 struct Stack_Window *stack_win;
 504                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 505                         if (stack_win->window == e->window) {
 506                                 render_container(conn, stack_win->container);
 507                                 return 1;
 508                         }
 509                 return 1;
 510         }
 511
 512         printf("handle_expose_event()\n");
 513         if (client->container->mode != MODE_STACK)
 514                 decorate_window(conn, client, client->frame, client->titlegc, 0);
 515         else {
 516                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND,
 517                         get_colorpixel(conn, client, client->frame, "#285577"));
 518
 519                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 520                 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &rect);
 521
 522                 xcb_flush(conn);
 523         }
 524         return 1;
 525 }
 526
 527 /*
 528  * Handle client messages (EWMH)
 529  *
 530  */
 531 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 532         printf("client_message\n");
 533
 534         if (event->type == atoms[_NET_WM_STATE]) {
 535                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 536                         return 0;
 537
 538                 printf("fullscreen\n");
 539
 540                 Client *client = table_get(byChild, event->window);
 541                 if (client == NULL)
 542                         return 0;
 543
 544                 /* Check if the fullscreen state should be toggled */
 545                 if ((client->fullscreen &&
 546                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 547                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 548                     (!client->fullscreen &&
 549                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 550                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 551                         toggle_fullscreen(conn, client);
 552         } else {
 553                 printf("unhandled clientmessage\n");
 554                 return 0;
 555         }
 556
 557         return 1;
 558 }
 559
 560 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 561                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 562         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 563          before changing this property. */
 564         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 565         return 0;
 566 }