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