git.sur5r.net Git - i3/i3/blob - src/floating.c

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009-2010 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * src/floating.c: contains all functions for handling floating clients
  11  *
  12  */
  13
  14
  15 #include "all.h"
  16
  17 extern xcb_connection_t *conn;
  18
  19 void floating_enable(Con *con, bool automatic) {
  20     /* 1: detach the container from its parent */
  21     /* TODO: refactor this with tree_close() */
  22     TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  23     TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  24
  25     con_fix_percent(con->parent, WINDOW_REMOVE);
  26
  27     /* 2: create a new container to render the decoration on, add
  28      * it as a floating window to the workspace */
  29     Con *nc = con_new(NULL);
  30     nc->parent = con_get_workspace(con);
  31     nc->rect = con->rect;
  32     nc->orientation = NO_ORIENTATION;
  33     nc->type = CT_FLOATING_CON;
  34     TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
  35     TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
  36
  37     /* 3: attach the child to the new parent container */
  38     con->old_parent = con->parent;
  39     con->parent = nc;
  40     con->floating = FLOATING_USER_ON;
  41     nc->rect.x = 400;
  42     nc->rect.y = 400;
  43     TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
  44     TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  45 }
  46
  47 void floating_disable(Con *con, bool automatic) {
  48     assert(con->old_parent != NULL);
  49
  50     /* 1: detach from parent container */
  51     TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  52     TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  53
  54     /* 2: kill parent container */
  55     TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
  56     TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
  57     tree_close(con->parent, false);
  58
  59     /* 3: re-attach to previous parent */
  60     con->parent = con->old_parent;
  61     TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
  62     TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
  63
  64     con->floating = FLOATING_USER_OFF;
  65
  66     con_fix_percent(con->parent, WINDOW_ADD);
  67 }
  68
  69
  70 /*
  71  * Toggles floating mode for the given container.
  72  *
  73  * If the automatic flag is set to true, this was an automatic update by a change of the
  74  * window class from the application which can be overwritten by the user.
  75  *
  76  */
  77 void toggle_floating_mode(Con *con, bool automatic) {
  78         //i3Font *font = load_font(conn, config.font);
  79
  80         /* see if the client is already floating */
  81         if (con_is_floating(con)) {
  82                 LOG("already floating, re-setting to tiling\n");
  83
  84                 floating_disable(con, automatic);
  85                 return;
  86         }
  87
  88         floating_enable(con, automatic);
  89
  90
  91 #if 0
  92         if (client->dock) {
  93                 DLOG("Not putting dock client into floating mode\n");
  94                 return;
  95         }
  96
  97         if (con == NULL) {
  98                 DLOG("This client is already in floating (container == NULL), re-inserting\n");
  99                 Client *next_tiling;
 100                 Workspace *ws = client->workspace;
 101                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
 102                         if (!client_is_floating(next_tiling))
 103                                 break;
 104                 /* If there are no tiling clients on this workspace, there can only be one
 105                  * container: the first one */
 106                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
 107                         con = ws->table[0][0];
 108                 else con = next_tiling->container;
 109
 110                 /* Remove the client from the list of floating clients */
 111                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
 112
 113                 DLOG("destination container = %p\n", con);
 114                 Client *old_focused = con->currently_focused;
 115                 /* Preserve position/size */
 116                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
 117
 118                 client->floating = FLOATING_USER_OFF;
 119                 client->container = con;
 120
 121                 if (old_focused != NULL && !old_focused->dock)
 122                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
 123                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
 124
 125                 DLOG("Re-inserted the window.\n");
 126                 con->currently_focused = client;
 127
 128                 client_set_below_floating(conn, client);
 129
 130                 render_container(conn, con);
 131                 xcb_flush(conn);
 132
 133                 return;
 134         }
 135
 136         DLOG("Entering floating for client %08x\n", client->child);
 137
 138         /* Remove the client of its container */
 139         client_remove_from_container(conn, client, con, false);
 140         client->container = NULL;
 141
 142         /* Add the client to the list of floating clients for its workspace */
 143         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 144
 145         if (con->currently_focused == client) {
 146                 DLOG("Need to re-adjust currently_focused\n");
 147                 /* Get the next client in the focus stack for this particular container */
 148                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 149         }
 150
 151         if (automatic)
 152                 client->floating = FLOATING_AUTO_ON;
 153         else client->floating = FLOATING_USER_ON;
 154
 155         /* Initialize the floating position from the position in tiling mode, if this
 156          * client never was floating (x == -1) */
 157         if (client->floating_rect.x == -1) {
 158                 /* Copy over the position */
 159                 client->floating_rect.x = client->rect.x;
 160                 client->floating_rect.y = client->rect.y;
 161
 162                 /* Copy size the other direction */
 163                 client->child_rect.width = client->floating_rect.width;
 164                 client->child_rect.height = client->floating_rect.height;
 165
 166                 client->rect.width = client->child_rect.width + 2 + 2;
 167                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 168
 169                 DLOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 170                                 client->floating_rect.width, client->floating_rect.height);
 171         } else {
 172                 /* If the client was already in floating before we restore the old position / size */
 173                 DLOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 174                         client->floating_rect.width, client->floating_rect.height);
 175                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 176         }
 177
 178         /* Raise the client */
 179         xcb_raise_window(conn, client->frame);
 180         reposition_client(conn, client);
 181         resize_client(conn, client);
 182         /* redecorate_window flushes */
 183         redecorate_window(conn, client);
 184
 185         /* Re-render the tiling layout of this container */
 186         render_container(conn, con);
 187         xcb_flush(conn);
 188 #endif
 189 }
 190
 191 #if 0
 192 /*
 193  * Removes the floating client from its workspace and attaches it to the new workspace.
 194  * This is centralized here because it may happen if you move it via keyboard and
 195  * if you move it using your mouse.
 196  *
 197  */
 198 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 199         /* Remove from focus stack and list of floating clients */
 200         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 201         TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
 202
 203         if (client->workspace->fullscreen_client == client)
 204                 client->workspace->fullscreen_client = NULL;
 205
 206         /* Insert into destination focus stack and list of floating clients */
 207         client->workspace = new_workspace;
 208         SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients);
 209         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 210         if (client->fullscreen)
 211                 client->workspace->fullscreen_client = client;
 212 }
 213
 214 /*
 215  * This is an ugly data structure which we need because there is no standard
 216  * way of having nested functions (only available as a gcc extension at the
 217  * moment, clang doesn’t support it) or blocks (only available as a clang
 218  * extension and only on Mac OS X systems at the moment).
 219  *
 220  */
 221 struct resize_callback_params {
 222         border_t border;
 223         xcb_button_press_event_t *event;
 224 };
 225
 226 DRAGGING_CB(resize_callback) {
 227         struct resize_callback_params *params = extra;
 228         xcb_button_press_event_t *event = params->event;
 229         switch (params->border) {
 230                 case BORDER_RIGHT: {
 231                         int new_width = old_rect->width + (new_x - event->root_x);
 232                         if ((new_width < 0) ||
 233                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 234                                 return;
 235                         client->rect.width = new_width;
 236                         break;
 237                 }
 238
 239                 case BORDER_BOTTOM: {
 240                         int new_height = old_rect->height + (new_y - event->root_y);
 241                         if ((new_height < 0) ||
 242                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 243                                 return;
 244                         client->rect.height = old_rect->height + (new_y - event->root_y);
 245                         break;
 246                 }
 247
 248                 case BORDER_TOP: {
 249                         int new_height = old_rect->height + (event->root_y - new_y);
 250                         if ((new_height < 0) ||
 251                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 252                                 return;
 253
 254                         client->rect.y = old_rect->y + (new_y - event->root_y);
 255                         client->rect.height = new_height;
 256                         break;
 257                 }
 258
 259                 case BORDER_LEFT: {
 260                         int new_width = old_rect->width + (event->root_x - new_x);
 261                         if ((new_width < 0) ||
 262                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 263                                 return;
 264                         client->rect.x = old_rect->x + (new_x - event->root_x);
 265                         client->rect.width = new_width;
 266                         break;
 267                 }
 268         }
 269
 270         /* Push the new position/size to X11 */
 271         reposition_client(conn, client);
 272         resize_client(conn, client);
 273         xcb_flush(conn);
 274 }
 275
 276
 277 /*
 278  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 279  * Determines on which border the user clicked and launches the drag_pointer function
 280  * with the resize_callback.
 281  *
 282  */
 283 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 284         DLOG("floating border click\n");
 285
 286         border_t border;
 287
 288         if (event->event_y < 2)
 289                 border = BORDER_TOP;
 290         else if (event->event_y >= (client->rect.height - 2))
 291                 border = BORDER_BOTTOM;
 292         else if (event->event_x <= 2)
 293                 border = BORDER_LEFT;
 294         else if (event->event_x >= (client->rect.width - 2))
 295                 border = BORDER_RIGHT;
 296         else {
 297                 DLOG("Not on any border, not doing anything.\n");
 298                 return 1;
 299         }
 300
 301         DLOG("border = %d\n", border);
 302
 303         struct resize_callback_params params = { border, event };
 304
 305         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback, &params);
 306
 307         return 1;
 308 }
 309
 310 #endif
 311 DRAGGING_CB(drag_window_callback) {
 312         struct xcb_button_press_event_t *event = extra;
 313
 314         /* Reposition the client correctly while moving */
 315         con->rect.x = old_rect->x + (new_x - event->root_x);
 316         con->rect.y = old_rect->y + (new_y - event->root_y);
 317         /* TODO: don’t re-render the whole tree just because we change
 318          * coordinates of a floating window */
 319         tree_render();
 320         x_push_changes(croot);
 321 }
 322
 323 /*
 324  * Called when the user clicked on the titlebar of a floating window.
 325  * Calls the drag_pointer function with the drag_window callback
 326  *
 327  */
 328 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
 329         DLOG("floating_drag_window\n");
 330
 331         drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
 332         tree_render();
 333 }
 334
 335 /*
 336  * This is an ugly data structure which we need because there is no standard
 337  * way of having nested functions (only available as a gcc extension at the
 338  * moment, clang doesn’t support it) or blocks (only available as a clang
 339  * extension and only on Mac OS X systems at the moment).
 340  *
 341  */
 342 struct resize_window_callback_params {
 343     border_t corner;
 344     bool proportional;
 345     xcb_button_press_event_t *event;
 346 };
 347
 348 DRAGGING_CB(resize_window_callback) {
 349     struct resize_window_callback_params *params = extra;
 350     xcb_button_press_event_t *event = params->event;
 351     border_t corner = params->corner;
 352
 353     int32_t dest_x = con->rect.x;
 354     int32_t dest_y = con->rect.y;
 355     uint32_t dest_width;
 356     uint32_t dest_height;
 357
 358     double ratio = (double) old_rect->width / old_rect->height;
 359
 360     /* First guess: We resize by exactly the amount the mouse moved,
 361      * taking into account in which corner the client was grabbed */
 362     if (corner & BORDER_LEFT)
 363             dest_width = old_rect->width - (new_x - event->root_x);
 364     else dest_width = old_rect->width + (new_x - event->root_x);
 365
 366     if (corner & BORDER_TOP)
 367             dest_height = old_rect->height - (new_y - event->root_y);
 368     else dest_height = old_rect->height + (new_y - event->root_y);
 369
 370     /* TODO: minimum window size */
 371 #if 0
 372     /* Obey minimum window size */
 373     dest_width = max(dest_width, client_min_width(client));
 374     dest_height = max(dest_height, client_min_height(client));
 375 #endif
 376
 377     /* User wants to keep proportions, so we may have to adjust our values */
 378     if (params->proportional) {
 379             dest_width = max(dest_width, (int) (dest_height * ratio));
 380             dest_height = max(dest_height, (int) (dest_width / ratio));
 381     }
 382
 383     /* If not the lower right corner is grabbed, we must also reposition
 384      * the client by exactly the amount we resized it */
 385     if (corner & BORDER_LEFT)
 386             dest_x = old_rect->x + (old_rect->width - dest_width);
 387
 388     if (corner & BORDER_TOP)
 389             dest_y = old_rect->y + (old_rect->height - dest_height);
 390
 391     con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
 392
 393     /* TODO: don’t re-render the whole tree just because we change
 394      * coordinates of a floating window */
 395     tree_render();
 396     x_push_changes(croot);
 397 }
 398
 399 /*
 400  * Called when the user clicked on a floating window while holding the
 401  * floating_modifier and the right mouse button.
 402  * Calls the drag_pointer function with the resize_window callback
 403  *
 404  */
 405 void floating_resize_window(Con *con, bool proportional,
 406                             xcb_button_press_event_t *event) {
 407     DLOG("floating_resize_window\n");
 408
 409     /* corner saves the nearest corner to the original click. It contains
 410      * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
 411     border_t corner = 0;
 412
 413     if (event->event_x <= (con->rect.width / 2))
 414             corner |= BORDER_LEFT;
 415     else corner |= BORDER_RIGHT;
 416
 417     if (event->event_y <= (con->rect.height / 2))
 418             corner |= BORDER_TOP;
 419     else corner |= BORDER_RIGHT;
 420
 421     struct resize_window_callback_params params = { corner, proportional, event };
 422
 423     drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
 424 }
 425
 426 /*
 427  * This function grabs your pointer and lets you drag stuff around (borders).
 428  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 429  * and the given callback will be called with the parameters specified (client,
 430  * border on which the click originally was), the original rect of the client,
 431  * the event and the new coordinates (x, y).
 432  *
 433  */
 434 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
 435                 confine_to, border_t border, callback_t callback, void *extra)
 436 {
 437         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 438         uint32_t new_x, new_y;
 439         Rect old_rect;
 440         if (con != NULL)
 441                 memcpy(&old_rect, &(con->rect), sizeof(Rect));
 442
 443         /* Grab the pointer */
 444         /* TODO: returncode */
 445         xcb_grab_pointer(conn,
 446                         false,               /* get all pointer events specified by the following mask */
 447                         root,                /* grab the root window */
 448                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 449                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 450                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 451                         confine_to,          /* confine_to = in which window should the cursor stay */
 452                         XCB_NONE,            /* don’t display a special cursor */
 453                         XCB_CURRENT_TIME);
 454
 455         /* Go into our own event loop */
 456         xcb_flush(conn);
 457
 458         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 459         /* I’ve always wanted to have my own eventhandler… */
 460         while ((inside_event = xcb_wait_for_event(conn))) {
 461                 /* We now handle all events we can get using xcb_poll_for_event */
 462                 do {
 463                         /* Same as get_event_handler in xcb */
 464                         int nr = inside_event->response_type;
 465                         if (nr == 0) {
 466                                 /* An error occured */
 467                                 //handle_event(NULL, conn, inside_event);
 468                                 free(inside_event);
 469                                 continue;
 470                         }
 471                         assert(nr < 256);
 472                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 473                         assert(nr >= 2);
 474
 475                         switch (nr) {
 476                                 case XCB_BUTTON_RELEASE:
 477                                         goto done;
 478
 479                                 case XCB_MOTION_NOTIFY:
 480                                         /* motion_notify events are saved for later */
 481                                         FREE(last_motion_notify);
 482                                         last_motion_notify = inside_event;
 483                                         break;
 484
 485                                 case XCB_UNMAP_NOTIFY:
 486                                         DLOG("Unmap-notify, aborting\n");
 487                                         xcb_event_handle(&evenths, inside_event);
 488                                         goto done;
 489
 490                                 default:
 491                                         DLOG("Passing to original handler\n");
 492                                         /* Use original handler */
 493                                         xcb_event_handle(&evenths, inside_event);
 494                                         break;
 495                         }
 496                         if (last_motion_notify != inside_event)
 497                                 free(inside_event);
 498                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 499
 500                 if (last_motion_notify == NULL)
 501                         continue;
 502
 503                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 504                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 505
 506                 callback(con, &old_rect, new_x, new_y, extra);
 507                 FREE(last_motion_notify);
 508         }
 509 done:
 510         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 511         xcb_flush(conn);
 512 }
 513
 514 #if 0
 515 /*
 516  * Changes focus in the given direction for floating clients.
 517  *
 518  * Changing to the left/right means going to the previous/next floating client,
 519  * changing to top/bottom means cycling through the Z-index.
 520  *
 521  */
 522 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 523         DLOG("floating focus\n");
 524
 525         if (direction == D_LEFT || direction == D_RIGHT) {
 526                 /* Go to the next/previous floating client */
 527                 Client *client;
 528
 529                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 530                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 531                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 532                         if (!client->floating)
 533                                 continue;
 534                         set_focus(conn, client, true);
 535                         return;
 536                 }
 537         }
 538 }
 539
 540 /*
 541  * Moves the client 10px to the specified direction.
 542  *
 543  */
 544 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 545         DLOG("floating move\n");
 546
 547         Rect destination = currently_focused->rect;
 548         Rect *screen = &(currently_focused->workspace->output->rect);
 549
 550         switch (direction) {
 551                 case D_LEFT:
 552                         destination.x -= 10;
 553                         break;
 554                 case D_RIGHT:
 555                         destination.x += 10;
 556                         break;
 557                 case D_UP:
 558                         destination.y -= 10;
 559                         break;
 560                 case D_DOWN:
 561                         destination.y += 10;
 562                         break;
 563                 /* to make static analyzers happy */
 564                 default:
 565                         break;
 566         }
 567
 568         /* Prevent windows from vanishing completely */
 569         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 570             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 571             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 572             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 573                 DLOG("boundary check failed, not moving\n");
 574                 return;
 575         }
 576
 577         currently_focused->rect = destination;
 578         reposition_client(conn, currently_focused);
 579
 580         /* Because reposition_client does not send a faked configure event (only resize does),
 581          * we need to initiate that on our own */
 582         fake_absolute_configure_notify(conn, currently_focused);
 583         /* fake_absolute_configure_notify flushes */
 584 }
 585
 586 /*
 587  * Hides all floating clients (or show them if they are currently hidden) on
 588  * the specified workspace.
 589  *
 590  */
 591 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 592         Client *client;
 593
 594         workspace->floating_hidden = !workspace->floating_hidden;
 595         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 596         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 597                 if (workspace->floating_hidden)
 598                         client_unmap(conn, client);
 599                 else client_map(conn, client);
 600         }
 601
 602         /* If we just unmapped all floating windows we should ensure that the focus
 603          * is set correctly, that ist, to the first non-floating client in stack */
 604         if (workspace->floating_hidden)
 605                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 606                         if (client_is_floating(client))
 607                                 continue;
 608                         set_focus(conn, client, true);
 609                         return;
 610                 }
 611
 612         xcb_flush(conn);
 613 }
 614 #endif