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, -1, 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,
 241                                              (orientation == O_VERTICAL ?
 242                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
 243                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), 0, NULL);
 244
 245         uint32_t values[1] = {get_colorpixel(conn, NULL, helpwin, "#4c7899")};
 246         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 247         check_error(conn, cookie, "Could not change window attributes (background color)");
 248
 249         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 250
 251         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 252                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 253
 254         xcb_flush(conn);
 255
 256         xcb_generic_event_t *inside_event;
 257         /* I’ve always wanted to have my own eventhandler… */
 258         while ((inside_event = xcb_wait_for_event(conn))) {
 259                 /* Same as get_event_handler in xcb */
 260                 int nr = inside_event->response_type;
 261                 if (nr == 0) {
 262                         /* An error occured */
 263                         handle_event(NULL, conn, inside_event);
 264                         free(inside_event);
 265                         continue;
 266                 }
 267                 assert(nr < 256);
 268                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 269                 assert(nr >= 2);
 270
 271                 /* Check if we need to escape this loop */
 272                 if (nr == XCB_BUTTON_RELEASE)
 273                         break;
 274
 275                 switch (nr) {
 276                         case XCB_MOTION_NOTIFY:
 277                                 if (orientation == O_VERTICAL) {
 278                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 279                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 280                                 } else {
 281                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 282                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 283                                 }
 284
 285                                 xcb_flush(conn);
 286                                 break;
 287                         case XCB_EXPOSE:
 288                                 /* Use original handler */
 289                                 xcb_event_handle(&evenths, inside_event);
 290                                 break;
 291                         default:
 292                                 printf("Ignoring event of type %d\n", nr);
 293                                 break;
 294                 }
 295                 free(inside_event);
 296         }
 297
 298         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 299         xcb_destroy_window(conn, helpwin);
 300         xcb_destroy_window(conn, grabwin);
 301         xcb_flush(conn);
 302
 303         Workspace *ws = con->workspace;
 304         if (orientation == O_VERTICAL) {
 305                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 306
 307                 /* Convert 0 (for default width_factor) to actual numbers */
 308                 if (first->width_factor == 0)
 309                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 310                 if (second->width_factor == 0)
 311                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 312
 313                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 314                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 315         } else {
 316                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 317
 318                 /* Convert 0 (for default height_factor) to actual numbers */
 319                 if (first->height_factor == 0)
 320                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 321                 if (second->height_factor == 0)
 322                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 323
 324                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 325                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 326         }
 327
 328         render_layout(conn);
 329
 330         return 1;
 331 }
 332
 333 /*
 334  * A new window appeared on the screen (=was mapped), so let’s manage it.
 335  *
 336  */
 337 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 338         window_attributes_t wa = { TAG_VALUE };
 339         wa.u.override_redirect = event->override_redirect;
 340         printf("MapNotify for 0x%08x, serial is %d.\n", event->window, event->sequence);
 341         ignore_notify_event = event->sequence;
 342         manage_window(prophs, conn, event->window, wa);
 343         return 1;
 344 }
 345
 346 /*
 347  * Configuration notifies are only handled because we need to set up ignore for the following
 348  * enter notify events
 349  *
 350  */
 351 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
 352         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 353
 354         printf("handle_configure_event\n");
 355         printf("event->x = %d, ->y = %d, ->width = %d, ->height = %d\n", event->x, event->y, event->width, event->height);
 356         if (event->event == root) {
 357                 printf("reconfigure of the root window, need to xinerama\n");
 358                 xinerama_requery_screens(conn);
 359                 return 1;
 360         }
 361
 362         ignore_notify_event = event->sequence;
 363
 364         Client *client = table_get(byChild, event->window);
 365         if (client == NULL) {
 366                 printf("client not managed, ignoring\n");
 367                 return 1;
 368         }
 369
 370         if (client->fullscreen) {
 371                 printf("client in fullscreen, not touching\n");
 372                 return 1;
 373         }
 374
 375         /* Let’s see if the application has changed size/position on its own *sigh*… */
 376         if ((event->x != client->child_rect.x) ||
 377             (event->y != client->child_rect.y) ||
 378             (event->width != client->child_rect.width) ||
 379             (event->height != client->child_rect.height)) {
 380                 /* Who is your window manager? Who’s that, huh? I AM YOUR WINDOW MANAGER! */
 381                 printf("Application wanted to resize itself. Fixed that.\n");
 382                 client->force_reconfigure = true;
 383                 render_container(conn, client->container);
 384                 xcb_flush(conn);
 385         }
 386
 387         return 1;
 388 }
 389
 390 /*
 391  * Our window decorations were unmapped. That means, the window will be killed now,
 392  * so we better clean up before.
 393  *
 394  */
 395 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 396         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 397
 398         ignore_notify_event = e->sequence;
 399
 400         Client *client = table_get(byChild, e->window);
 401         /* First, we need to check if the client is awaiting an unmap-request which
 402            was generated by us reparenting the window. In that case, we just ignore it. */
 403         if (client != NULL && client->awaiting_useless_unmap) {
 404                 printf("Dropping this unmap request, it was generated by reparenting\n");
 405                 client->awaiting_useless_unmap = false;
 406                 return 1;
 407         }
 408         client = table_remove(byChild, e->window);
 409
 410         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 411         if (client == NULL) {
 412                 printf("not a managed window. Ignoring.\n");
 413                 return 0;
 414         }
 415
 416         if (client->container != NULL) {
 417                 Client *to_focus = NULL;
 418                 Container *con = client->container;
 419
 420                 /* If the client which is being unmapped was the currently active, we need to find
 421                    the next possible window to focus in this container */
 422                 if (con->currently_focused == client) {
 423                         to_focus = CIRCLEQ_NEXT_OR_NULL(&(con->clients), client, clients);
 424                         if (to_focus == NULL)
 425                                 to_focus = CIRCLEQ_PREV_OR_NULL(&(con->clients), client, clients);
 426
 427                         /* Set focus in data structure to the next/previous window, if any (else NULL) */
 428                         con->currently_focused = to_focus;
 429                 }
 430
 431                 /* If this was the fullscreen client, we need to unset it */
 432                 if (client->fullscreen)
 433                         con->workspace->fullscreen_client = NULL;
 434
 435                 /* If the container will be empty now and is in stacking mode, we need to
 436                    correctly resize the stack_win */
 437                 if (con->currently_focused == NULL && con->mode == MODE_STACK) {
 438                         struct Stack_Window *stack_win = &(con->stack_win);
 439                         stack_win->height = 0;
 440                         xcb_unmap_window(c, stack_win->window);
 441                 }
 442
 443                 /* Remove the client from the list of clients */
 444                 CIRCLEQ_REMOVE(&(con->clients), client, clients);
 445
 446                 /* Actually set focus, if there is a window which should get it */
 447                 if (to_focus != NULL)
 448                         set_focus(c, to_focus);
 449         }
 450
 451         printf("child of 0x%08x.\n", client->frame);
 452         xcb_reparent_window(c, client->child, root, 0, 0);
 453         xcb_destroy_window(c, client->frame);
 454         xcb_flush(c);
 455         table_remove(byParent, client->frame);
 456
 457         cleanup_table(c, client->container->workspace);
 458
 459         free(client);
 460
 461         render_layout(c);
 462
 463         return 1;
 464 }
 465
 466 /*
 467  * Called when a window changes its title
 468  *
 469  */
 470 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 471                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 472         printf("window's name changed.\n");
 473         Client *client = table_get(byChild, window);
 474         if (client == NULL)
 475                 return 1;
 476
 477         client->name_len = xcb_get_property_value_length(prop);
 478         client->name = malloc(client->name_len);
 479         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 480         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 481
 482         if (client->container->mode == MODE_STACK)
 483                 render_container(conn, client->container);
 484         else decorate_window(conn, client, client->frame, client->titlegc, 0);
 485         xcb_flush(conn);
 486
 487         return 1;
 488 }
 489
 490 /*
 491  * Expose event means we should redraw our windows (= title bar)
 492  *
 493  */
 494 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 495         printf("got expose_event\n");
 496         /* e->count is the number of minimum remaining expose events for this window, so we
 497            skip all events but the last one */
 498         if (e->count != 0)
 499                 return 1;
 500
 501         Client *client = table_get(byParent, e->window);
 502         if (client == NULL) {
 503                 /* There was no client in the table, so this is probably an expose event for
 504                    one of our stack_windows. */
 505                 struct Stack_Window *stack_win;
 506                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 507                         if (stack_win->window == e->window) {
 508                                 render_container(conn, stack_win->container);
 509                                 return 1;
 510                         }
 511                 return 1;
 512         }
 513
 514         printf("handle_expose_event()\n");
 515         if (client->container->mode != MODE_STACK)
 516                 decorate_window(conn, client, client->frame, client->titlegc, 0);
 517         else {
 518                 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND,
 519                         get_colorpixel(conn, client, client->frame, "#285577"));
 520
 521                 xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
 522                 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &rect);
 523
 524                 xcb_flush(conn);
 525         }
 526         return 1;
 527 }
 528
 529 /*
 530  * Handle client messages (EWMH)
 531  *
 532  */
 533 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 534         printf("client_message\n");
 535
 536         if (event->type == atoms[_NET_WM_STATE]) {
 537                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 538                         return 0;
 539
 540                 printf("fullscreen\n");
 541
 542                 Client *client = table_get(byChild, event->window);
 543                 if (client == NULL)
 544                         return 0;
 545
 546                 /* Check if the fullscreen state should be toggled */
 547                 if ((client->fullscreen &&
 548                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 549                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 550                     (!client->fullscreen &&
 551                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 552                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 553                         toggle_fullscreen(conn, client);
 554         } else {
 555                 printf("unhandled clientmessage\n");
 556                 return 0;
 557         }
 558
 559         return 1;
 560 }
 561
 562 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 563                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 564         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 565          before changing this property. */
 566         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 567         return 0;
 568 }