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 are ignored. Focus will be changed via keyboard only. */
 114         if (client->container->mode == MODE_STACK)
 115                 return 1;
 116
 117         set_focus(conn, client);
 118
 119         return 1;
 120 }
 121
 122 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 123         printf("button press!\n");
 124         /* This was either a focus for a client’s parent (= titlebar)… */
 125         Client *client = table_get(byChild, event->event);
 126         bool border_click = false;
 127         if (client == NULL) {
 128                 client = table_get(byParent, event->event);
 129                 border_click = true;
 130         }
 131         if (client == NULL)
 132                 return 1;
 133
 134         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 135         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 136
 137         /* Set focus in any case */
 138         set_focus(conn, client);
 139
 140         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 141         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 142
 143         Container *con = client->container,
 144                   *first = NULL,
 145                   *second = NULL;
 146         enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
 147
 148         if (con == NULL) {
 149                 printf("dock. done.\n");
 150                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 151                 xcb_flush(conn);
 152                 return 1;
 153         }
 154
 155         printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 156
 157         if (!border_click) {
 158                 printf("client. done.\n");
 159                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 160                 xcb_flush(conn);
 161                 return 1;
 162         }
 163
 164         if (event->event_y < 2) {
 165                 /* This was a press on the top border */
 166                 if (con->row == 0)
 167                         return 1;
 168                 first = con->workspace->table[con->col][con->row-1];
 169                 second = con;
 170                 orientation = O_HORIZONTAL;
 171         } else if (event->event_y >= (client->rect.height - 2)) {
 172                 /* …bottom border */
 173                 if (con->row == (con->workspace->rows-1))
 174                         return 1;
 175                 first = con;
 176                 second = con->workspace->table[con->col][con->row+1];
 177                 orientation = O_HORIZONTAL;
 178         } else if (event->event_x < 2) {
 179                 /* …left border */
 180                 if (con->col == 0)
 181                         return 1;
 182                 first = con->workspace->table[con->col-1][con->row];
 183                 second = con;
 184         } else if (event->event_x > 2) {
 185                 /* …right border */
 186                 if (con->col == (con->workspace->cols-1))
 187                         return 1;
 188                 first = con;
 189                 second = con->workspace->table[con->col+1][con->row];
 190         }
 191
 192         /* Open a new window, the resizebar. Grab the pointer and move the window around
 193            as the user moves the pointer. */
 194         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
 195         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, 0, NULL);
 196
 197         Rect helprect;
 198         if (orientation == O_VERTICAL) {
 199                 helprect.x = event->root_x;
 200                 helprect.y = 0;
 201                 helprect.width = 2;
 202                 helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
 203         } else {
 204                 helprect.x = 0;
 205                 helprect.y = event->root_y;
 206                 helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width*/
 207                 helprect.height = 2;
 208         }
 209         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT, 0, NULL);
 210
 211         uint32_t values[1] = {get_colorpixel(conn, NULL, helpwin, "#4c7899")};
 212         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 213         check_error(conn, cookie, "Could not change window attributes (background color)");
 214
 215         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 216
 217         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 218                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 219
 220         xcb_flush(conn);
 221
 222         xcb_generic_event_t *inside_event;
 223         /* I’ve always wanted to have my own eventhandler… */
 224         while ((inside_event = xcb_wait_for_event(conn))) {
 225                 /* Same as get_event_handler in xcb */
 226                 int nr = inside_event->response_type;
 227                 if (nr == 0) {
 228                         /* An error occured */
 229                         handle_event(NULL, conn, inside_event);
 230                         free(inside_event);
 231                         continue;
 232                 }
 233                 assert(nr < 256);
 234                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 235                 assert(nr >= 2);
 236
 237                 /* Check if we need to escape this loop */
 238                 if (nr == XCB_BUTTON_RELEASE)
 239                         break;
 240
 241                 switch (nr) {
 242                         case XCB_MOTION_NOTIFY:
 243                                 if (orientation == O_VERTICAL) {
 244                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 245                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 246                                 } else {
 247                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 248                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 249                                 }
 250
 251                                 xcb_flush(conn);
 252                                 break;
 253                         case XCB_EXPOSE:
 254                                 /* Use original handler */
 255                                 xcb_event_handle(&evenths, inside_event);
 256                                 break;
 257                         default:
 258                                 printf("Ignoring event of type %d\n", nr);
 259                                 break;
 260                 }
 261                 free(inside_event);
 262         }
 263
 264         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 265         xcb_destroy_window(conn, helpwin);
 266         xcb_destroy_window(conn, grabwin);
 267         xcb_flush(conn);
 268
 269         Workspace *ws = con->workspace;
 270         if (orientation == O_VERTICAL) {
 271                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 272
 273                 /* Convert 0 (for default width_factor) to actual numbers */
 274                 if (first->width_factor == 0)
 275                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 276                 if (second->width_factor == 0)
 277                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 278
 279                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 280                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 281         } else {
 282                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 283
 284                 /* Convert 0 (for default height_factor) to actual numbers */
 285                 if (first->height_factor == 0)
 286                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 287                 if (second->height_factor == 0)
 288                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 289
 290                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 291                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 292         }
 293
 294         render_layout(conn);
 295
 296         return 1;
 297 }
 298
 299 /*
 300  * A new window appeared on the screen (=was mapped), so let’s manage it.
 301  *
 302  */
 303 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 304         window_attributes_t wa = { TAG_VALUE };
 305         wa.u.override_redirect = event->override_redirect;
 306         printf("MapNotify for 0x%08x.\n", event->window);
 307         manage_window(prophs, conn, event->window, wa);
 308         return 1;
 309 }
 310
 311 /*
 312  * Our window decorations were unmapped. That means, the window will be killed now,
 313  * so we better clean up before.
 314  *
 315  */
 316 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 317         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 318
 319         Client *client = table_get(byChild, e->window);
 320         /* First, we need to check if the client is awaiting an unmap-request which
 321            was generated by us reparenting the window. In that case, we just ignore it. */
 322         if (client != NULL && client->awaiting_useless_unmap) {
 323                 printf("Dropping this unmap request, it was generated by reparenting\n");
 324                 client->awaiting_useless_unmap = false;
 325                 return 1;
 326         }
 327         client = table_remove(byChild, e->window);
 328
 329         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 330         if (client == NULL) {
 331                 printf("not a managed window. Ignoring.\n");
 332                 return 0;
 333         }
 334
 335         if (client->container != NULL) {
 336                 Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(client->container->clients), client, clients);
 337                 if (to_focus == NULL)
 338                         to_focus = CIRCLEQ_PREV_OR_NULL(&(client->container->clients), client, clients);
 339
 340                 /* Set focus in data structure to the next/previous window, if any (else NULL) */
 341                 if (client->container->currently_focused == client)
 342                         client->container->currently_focused = to_focus;
 343
 344                 /* If this was the fullscreen client, we need to unset it */
 345                 if (client->container->workspace->fullscreen_client == client)
 346                         client->container->workspace->fullscreen_client = NULL;
 347
 348                 /* Remove the client from the list of clients */
 349                 CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 350
 351                 /* Actually set focus, if there is a window which should get it */
 352                 if (to_focus != NULL)
 353                         set_focus(c, to_focus);
 354         }
 355
 356         printf("child of 0x%08x.\n", client->frame);
 357         xcb_reparent_window(c, client->child, root, 0, 0);
 358         xcb_destroy_window(c, client->frame);
 359         xcb_flush(c);
 360         table_remove(byParent, client->frame);
 361
 362         cleanup_table(c, client->container->workspace);
 363
 364         free(client);
 365
 366         render_layout(c);
 367
 368         return 1;
 369 }
 370
 371 /*
 372  * Called when a window changes its title
 373  *
 374  */
 375 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 376                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 377         printf("window's name changed.\n");
 378         Client *client = table_get(byChild, window);
 379         if (client == NULL)
 380                 return 1;
 381
 382         client->name_len = xcb_get_property_value_length(prop);
 383         client->name = malloc(client->name_len);
 384         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 385         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 386
 387         decorate_window(conn, client, client->frame, client->titlegc, 0);
 388         xcb_flush(conn);
 389
 390         return 1;
 391 }
 392
 393 /*
 394  * Expose event means we should redraw our windows (= title bar)
 395  *
 396  */
 397 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 398         printf("got expose_event\n");
 399         /* e->count is the number of minimum remaining expose events for this window, so we
 400            skip all events but the last one */
 401         if (e->count != 0)
 402                 return 1;
 403
 404         Client *client = table_get(byParent, e->window);
 405         if (client == NULL) {
 406                 /* There was no client in the table, so this is probably an expose event for
 407                    one of our stack_windows. */
 408                 struct Stack_Window *stack_win;
 409                 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 410                         if (stack_win->window == e->window) {
 411                                 render_container(conn, stack_win->container);
 412                                 return 1;
 413                         }
 414                 return 1;
 415         }
 416
 417         printf("handle_expose_event()\n");
 418         if (client->container->mode != MODE_STACK)
 419                 decorate_window(conn, client, client->frame, client->titlegc, 0);
 420         return 1;
 421 }
 422
 423 /*
 424  * Handle client messages (EWMH)
 425  *
 426  */
 427 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 428         printf("client_message\n");
 429
 430         if (event->type == atoms[_NET_WM_STATE]) {
 431                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 432                         return 0;
 433
 434                 printf("fullscreen\n");
 435
 436                 Client *client = table_get(byChild, event->window);
 437                 if (client == NULL)
 438                         return 0;
 439
 440                 /* Check if the fullscreen state should be toggled */
 441                 if ((client->fullscreen &&
 442                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 443                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 444                     (!client->fullscreen &&
 445                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 446                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 447                         toggle_fullscreen(conn, client);
 448         } else {
 449                 printf("unhandled clientmessage\n");
 450                 return 0;
 451         }
 452
 453         return 1;
 454 }
 455
 456 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 457                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 458         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 459          before changing this property. */
 460         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 461         return 0;
 462 }