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
  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                 return 1;
 140
 141         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 142         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 143
 144         /* Set focus in any case */
 145         set_focus(conn, client);
 146
 147         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 148         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 149
 150         Container *con = client->container,
 151                   *first = NULL,
 152                   *second = NULL;
 153         enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
 154
 155         if (con == NULL) {
 156                 printf("dock. done.\n");
 157                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 158                 xcb_flush(conn);
 159                 return 1;
 160         }
 161
 162         printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 163
 164         if (!border_click) {
 165                 printf("client. done.\n");
 166                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 167                 xcb_flush(conn);
 168                 return 1;
 169         }
 170
 171         if (event->event_y < 2) {
 172                 /* This was a press on the top border */
 173                 if (con->row == 0)
 174                         return 1;
 175                 first = con->workspace->table[con->col][con->row-1];
 176                 second = con;
 177                 orientation = O_HORIZONTAL;
 178         } else if (event->event_y >= (client->rect.height - 2)) {
 179                 /* …bottom border */
 180                 if (con->row == (con->workspace->rows-1))
 181                         return 1;
 182                 first = con;
 183                 second = con->workspace->table[con->col][con->row+1];
 184                 orientation = O_HORIZONTAL;
 185         } else if (event->event_x < 2) {
 186                 /* …left border */
 187                 if (con->col == 0)
 188                         return 1;
 189                 first = con->workspace->table[con->col-1][con->row];
 190                 second = con;
 191         } else if (event->event_x > 2) {
 192                 /* …right border */
 193                 if (con->col == (con->workspace->cols-1))
 194                         return 1;
 195                 first = con;
 196                 second = con->workspace->table[con->col+1][con->row];
 197         }
 198
 199         /* Open a new window, the resizebar. Grab the pointer and move the window around
 200            as the user moves the pointer. */
 201         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
 202         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, 0, NULL);
 203
 204         Rect helprect;
 205         if (orientation == O_VERTICAL) {
 206                 helprect.x = event->root_x;
 207                 helprect.y = 0;
 208                 helprect.width = 2;
 209                 helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
 210         } else {
 211                 helprect.x = 0;
 212                 helprect.y = event->root_y;
 213                 helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width*/
 214                 helprect.height = 2;
 215         }
 216         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT, 0, NULL);
 217
 218         uint32_t values[1] = {get_colorpixel(conn, NULL, helpwin, "#4c7899")};
 219         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 220         check_error(conn, cookie, "Could not change window attributes (background color)");
 221
 222         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 223
 224         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 225                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 226
 227         xcb_flush(conn);
 228
 229         xcb_generic_event_t *inside_event;
 230         /* I’ve always wanted to have my own eventhandler… */
 231         while ((inside_event = xcb_wait_for_event(conn))) {
 232                 /* Same as get_event_handler in xcb */
 233                 int nr = inside_event->response_type;
 234                 if (nr == 0) {
 235                         /* An error occured */
 236                         handle_event(NULL, conn, inside_event);
 237                         free(inside_event);
 238                         continue;
 239                 }
 240                 assert(nr < 256);
 241                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 242                 assert(nr >= 2);
 243
 244                 /* Check if we need to escape this loop */
 245                 if (nr == XCB_BUTTON_RELEASE)
 246                         break;
 247
 248                 switch (nr) {
 249                         case XCB_MOTION_NOTIFY:
 250                                 if (orientation == O_VERTICAL) {
 251                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 252                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 253                                 } else {
 254                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 255                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 256                                 }
 257
 258                                 xcb_flush(conn);
 259                                 break;
 260                         case XCB_EXPOSE:
 261                                 /* Use original handler */
 262                                 xcb_event_handle(&evenths, inside_event);
 263                                 break;
 264                         default:
 265                                 printf("Ignoring event of type %d\n", nr);
 266                                 break;
 267                 }
 268                 free(inside_event);
 269         }
 270
 271         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 272         xcb_destroy_window(conn, helpwin);
 273         xcb_destroy_window(conn, grabwin);
 274         xcb_flush(conn);
 275
 276         Workspace *ws = con->workspace;
 277         if (orientation == O_VERTICAL) {
 278                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 279
 280                 /* Convert 0 (for default width_factor) to actual numbers */
 281                 if (first->width_factor == 0)
 282                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 283                 if (second->width_factor == 0)
 284                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 285
 286                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 287                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 288         } else {
 289                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 290
 291                 /* Convert 0 (for default height_factor) to actual numbers */
 292                 if (first->height_factor == 0)
 293                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 294                 if (second->height_factor == 0)
 295                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 296
 297                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 298                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 299         }
 300
 301         render_layout(conn);
 302
 303         return 1;
 304 }
 305
 306 /*
 307  * A new window appeared on the screen (=was mapped), so let’s manage it.
 308  *
 309  */
 310 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 311         window_attributes_t wa = { TAG_VALUE };
 312         wa.u.override_redirect = event->override_redirect;
 313         printf("MapNotify for 0x%08x, serial is %d.\n", event->window, event->sequence);
 314         ignore_notify_event = event->sequence;
 315         manage_window(prophs, conn, event->window, wa);
 316         return 1;
 317 }
 318
 319 /*
 320  * Configuration notifies are only handled because we need to set up ignore for the following
 321  * enter notify events
 322  *
 323  */
 324 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
 325         printf("handle_configure_event\n");
 326         ignore_notify_event = event->sequence;
 327         return 1;
 328 }
 329
 330 /*
 331  * Our window decorations were unmapped. That means, the window will be killed now,
 332  * so we better clean up before.
 333  *
 334  */
 335 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 336         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 337
 338         ignore_notify_event = e->sequence;
 339
 340         Client *client = table_get(byChild, e->window);
 341         /* First, we need to check if the client is awaiting an unmap-request which
 342            was generated by us reparenting the window. In that case, we just ignore it. */
 343         if (client != NULL && client->awaiting_useless_unmap) {
 344                 printf("Dropping this unmap request, it was generated by reparenting\n");
 345                 client->awaiting_useless_unmap = false;
 346                 return 1;
 347         }
 348         client = table_remove(byChild, e->window);
 349
 350         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 351         if (client == NULL) {
 352                 printf("not a managed window. Ignoring.\n");
 353                 return 0;
 354         }
 355
 356         if (client->container != NULL) {
 357                 Client *to_focus = NULL;
 358                 Container *con = client->container;
 359
 360                 /* If the client which is being unmapped was the currently active, we need to find
 361                    the next possible window to focus in this container */
 362                 if (con->currently_focused == client) {
 363                         to_focus = CIRCLEQ_NEXT_OR_NULL(&(con->clients), client, clients);
 364                         if (to_focus == NULL)
 365                                 to_focus = CIRCLEQ_PREV_OR_NULL(&(con->clients), client, clients);
 366
 367                         /* Set focus in data structure to the next/previous window, if any (else NULL) */
 368                         con->currently_focused = to_focus;
 369                 }
 370
 371                 /* If this was the fullscreen client, we need to unset it */
 372                 if (con->workspace->fullscreen_client == client)
 373                         con->workspace->fullscreen_client = NULL;
 374
 375                 /* If the container will be empty now and is in stacking mode, we need to
 376                    correctly resize the stack_win */
 377                 if (con->currently_focused == NULL && con->mode == MODE_STACK) {
 378                         struct Stack_Window *stack_win = &(con->stack_win);
 379                         stack_win->height = 0;
 380                         xcb_unmap_window(c, stack_win->window);
 381                 }
 382
 383                 /* Remove the client from the list of clients */
 384                 CIRCLEQ_REMOVE(&(con->clients), client, clients);
 385
 386                 /* Actually set focus, if there is a window which should get it */
 387                 if (to_focus != NULL)
 388                         set_focus(c, to_focus);
 389         }
 390
 391         printf("child of 0x%08x.\n", client->frame);
 392         xcb_reparent_window(c, client->child, root, 0, 0);
 393         xcb_destroy_window(c, client->frame);
 394         xcb_flush(c);
 395         table_remove(byParent, client->frame);
 396
 397         cleanup_table(c, client->container->workspace);
 398
 399         free(client);
 400
 401         render_layout(c);
 402
 403         return 1;
 404 }
 405
 406 /*
 407  * Called when a window changes its title
 408  *
 409  */
 410 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 411                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 412         printf("window's name changed.\n");
 413         Client *client = table_get(byChild, window);
 414         if (client == NULL)
 415                 return 1;
 416
 417         client->name_len = xcb_get_property_value_length(prop);
 418         client->name = malloc(client->name_len);
 419         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 420         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 421
 422         if (client->container->mode == MODE_STACK)
 423                 render_container(conn, client->container);
 424         else decorate_window(conn, client, client->frame, client->titlegc, 0);
 425         xcb_flush(conn);
 426
 427         return 1;
 428 }
 429
 430 /*
 431  * Expose event means we should redraw our windows (= title bar)
 432  *
 433  */
 434 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 435         printf("got expose_event\n");
 436         /* e->count is the number of minimum remaining expose events for this window, so we
 437            skip all events but the last one */
 438         if (e->count != 0)
 439                 return 1;
 440
 441         Client *client = table_get(byParent, e->window);
 442         if (client == NULL) {
 443                 /* There was no client in the table, so this is probably an expose event for
 444                    one of our stack_windows. */
 445                 struct Stack_Window *stack_win;
 446                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 447                         if (stack_win->window == e->window) {
 448                                 render_container(conn, stack_win->container);
 449                                 return 1;
 450                         }
 451                 return 1;
 452         }
 453
 454         printf("handle_expose_event()\n");
 455         if (client->container->mode != MODE_STACK)
 456                 decorate_window(conn, client, client->frame, client->titlegc, 0);
 457         return 1;
 458 }
 459
 460 /*
 461  * Handle client messages (EWMH)
 462  *
 463  */
 464 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 465         printf("client_message\n");
 466
 467         if (event->type == atoms[_NET_WM_STATE]) {
 468                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 469                         return 0;
 470
 471                 printf("fullscreen\n");
 472
 473                 Client *client = table_get(byChild, event->window);
 474                 if (client == NULL)
 475                         return 0;
 476
 477                 /* Check if the fullscreen state should be toggled */
 478                 if ((client->fullscreen &&
 479                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 480                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 481                     (!client->fullscreen &&
 482                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 483                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 484                         toggle_fullscreen(conn, client);
 485         } else {
 486                 printf("unhandled clientmessage\n");
 487                 return 0;
 488         }
 489
 490         return 1;
 491 }
 492
 493 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 494                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 495         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 496          before changing this property. */
 497         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 498         return 0;
 499 }