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

   1 /*
   2  * vim:ts=8: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 /*
  20  * Toggles floating mode for the given container.
  21  *
  22  * If the automatic flag is set to true, this was an automatic update by a change of the
  23  * window class from the application which can be overwritten by the user.
  24  *
  25  */
  26 void toggle_floating_mode(Con *con, bool automatic) {
  27         //i3Font *font = load_font(conn, config.font);
  28
  29         /* see if the client is already floating */
  30         if (con_is_floating(con)) {
  31                 LOG("already floating, re-setting to tiling\n");
  32                 assert(con->old_parent != NULL);
  33
  34                 /* 1: detach from parent container */
  35                 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  36                 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  37
  38                 /* 2: kill parent container */
  39                 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
  40                 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
  41                 tree_close(con->parent, false);
  42
  43                 /* 3: re-attach to previous parent */
  44                 con->parent = con->old_parent;
  45                 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
  46                 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
  47
  48                 con->floating = FLOATING_USER_OFF;
  49
  50                 return;
  51         }
  52
  53         /* 1: detach the container from its parent */
  54         /* TODO: refactor this with tree_close() */
  55         TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  56         TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  57
  58         Con *child;
  59     int children = 0;
  60     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes)
  61         children++;
  62     /* TODO: better document why this math works */
  63     double fix = 1.0 / (1.0 - (1.0 / (children+1)));
  64     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes) {
  65         if (child->percent <= 0.0)
  66             continue;
  67         child->percent *= fix;
  68     }
  69
  70         /* 2: create a new container to render the decoration on, add
  71          * it as a floating window to the workspace */
  72         Con *nc = con_new(NULL);
  73         nc->parent = con_get_workspace(con);
  74         nc->rect = con->rect;
  75         nc->orientation = NO_ORIENTATION;
  76         nc->type = CT_FLOATING_CON;
  77         TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
  78         TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
  79
  80         /* 3: attach the child to the new parent container */
  81         con->old_parent = con->parent;
  82         con->parent = nc;
  83         con->floating = FLOATING_USER_ON;
  84         nc->rect.x = 400;
  85         nc->rect.y = 400;
  86         TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
  87         TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  88
  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         //reposition_client(conn, con);
 318         /* Because reposition_client does not send a faked configure event (only resize does),
 319          * we need to initiate that on our own */
 320         //fake_absolute_configure_notify(conn, client);
 321         /* fake_absolute_configure_notify flushes */
 322 }
 323
 324 /*
 325  * Called when the user clicked on the titlebar of a floating window.
 326  * Calls the drag_pointer function with the drag_window callback
 327  *
 328  */
 329 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
 330         DLOG("floating_drag_window\n");
 331
 332         drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
 333         tree_render();
 334 }
 335
 336 #if 0
 337 /*
 338  * This is an ugly data structure which we need because there is no standard
 339  * way of having nested functions (only available as a gcc extension at the
 340  * moment, clang doesn’t support it) or blocks (only available as a clang
 341  * extension and only on Mac OS X systems at the moment).
 342  *
 343  */
 344 struct resize_window_callback_params {
 345         border_t corner;
 346         bool proportional;
 347         xcb_button_press_event_t *event;
 348 };
 349
 350 DRAGGING_CB(resize_window_callback) {
 351         struct resize_window_callback_params *params = extra;
 352         xcb_button_press_event_t *event = params->event;
 353         border_t corner = params->corner;
 354
 355         int32_t dest_x = client->rect.x;
 356         int32_t dest_y = client->rect.y;
 357         uint32_t dest_width;
 358         uint32_t dest_height;
 359
 360         double ratio = (double) old_rect->width / old_rect->height;
 361
 362         /* First guess: We resize by exactly the amount the mouse moved,
 363          * taking into account in which corner the client was grabbed */
 364         if (corner & BORDER_LEFT)
 365                 dest_width = old_rect->width - (new_x - event->root_x);
 366         else dest_width = old_rect->width + (new_x - event->root_x);
 367
 368         if (corner & BORDER_TOP)
 369                 dest_height = old_rect->height - (new_y - event->root_y);
 370         else dest_height = old_rect->height + (new_y - event->root_y);
 371
 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
 376         /* User wants to keep proportions, so we may have to adjust our values */
 377         if (params->proportional) {
 378                 dest_width = max(dest_width, (int) (dest_height * ratio));
 379                 dest_height = max(dest_height, (int) (dest_width / ratio));
 380         }
 381
 382         /* If not the lower right corner is grabbed, we must also reposition
 383          * the client by exactly the amount we resized it */
 384         if (corner & BORDER_LEFT)
 385                 dest_x = old_rect->x + (old_rect->width - dest_width);
 386
 387         if (corner & BORDER_TOP)
 388                 dest_y = old_rect->y + (old_rect->height - dest_height);
 389
 390         client->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
 391
 392         /* resize_client flushes */
 393         resize_client(conn, client);
 394 }
 395
 396 /*
 397  * Called when the user clicked on a floating window while holding the
 398  * floating_modifier and the right mouse button.
 399  * Calls the drag_pointer function with the resize_window callback
 400  *
 401  */
 402 void floating_resize_window(xcb_connection_t *conn, Client *client,
 403                             bool proportional, xcb_button_press_event_t *event) {
 404         DLOG("floating_resize_window\n");
 405
 406         /* corner saves the nearest corner to the original click. It contains
 407          * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
 408         border_t corner = 0;
 409
 410         if (event->event_x <= (client->rect.width / 2))
 411                 corner |= BORDER_LEFT;
 412         else corner |= BORDER_RIGHT;
 413
 414         if (event->event_y <= (client->rect.height / 2))
 415                 corner |= BORDER_TOP;
 416         else corner |= BORDER_RIGHT;
 417
 418         struct resize_window_callback_params params = { corner, proportional, event };
 419
 420         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
 421 }
 422
 423 #endif
 424 /*
 425  * This function grabs your pointer and lets you drag stuff around (borders).
 426  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 427  * and the given callback will be called with the parameters specified (client,
 428  * border on which the click originally was), the original rect of the client,
 429  * the event and the new coordinates (x, y).
 430  *
 431  */
 432 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
 433                 confine_to, border_t border, callback_t callback, void *extra)
 434 {
 435         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 436         uint32_t new_x, new_y;
 437         Rect old_rect;
 438         if (con != NULL)
 439                 memcpy(&old_rect, &(con->rect), sizeof(Rect));
 440
 441         /* Grab the pointer */
 442         /* TODO: returncode */
 443         xcb_grab_pointer(conn,
 444                         false,               /* get all pointer events specified by the following mask */
 445                         root,                /* grab the root window */
 446                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 447                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 448                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 449                         confine_to,          /* confine_to = in which window should the cursor stay */
 450                         XCB_NONE,            /* don’t display a special cursor */
 451                         XCB_CURRENT_TIME);
 452
 453         /* Go into our own event loop */
 454         xcb_flush(conn);
 455
 456         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 457         /* I’ve always wanted to have my own eventhandler… */
 458         while ((inside_event = xcb_wait_for_event(conn))) {
 459                 /* We now handle all events we can get using xcb_poll_for_event */
 460                 do {
 461                         /* Same as get_event_handler in xcb */
 462                         int nr = inside_event->response_type;
 463                         if (nr == 0) {
 464                                 /* An error occured */
 465                                 //handle_event(NULL, conn, inside_event);
 466                                 free(inside_event);
 467                                 continue;
 468                         }
 469                         assert(nr < 256);
 470                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 471                         assert(nr >= 2);
 472
 473                         switch (nr) {
 474                                 case XCB_BUTTON_RELEASE:
 475                                         goto done;
 476
 477                                 case XCB_MOTION_NOTIFY:
 478                                         /* motion_notify events are saved for later */
 479                                         FREE(last_motion_notify);
 480                                         last_motion_notify = inside_event;
 481                                         break;
 482
 483                                 case XCB_UNMAP_NOTIFY:
 484                                         DLOG("Unmap-notify, aborting\n");
 485                                         xcb_event_handle(&evenths, inside_event);
 486                                         goto done;
 487
 488                                 default:
 489                                         DLOG("Passing to original handler\n");
 490                                         /* Use original handler */
 491                                         xcb_event_handle(&evenths, inside_event);
 492                                         break;
 493                         }
 494                         if (last_motion_notify != inside_event)
 495                                 free(inside_event);
 496                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 497
 498                 if (last_motion_notify == NULL)
 499                         continue;
 500
 501                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 502                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 503
 504                 callback(con, &old_rect, new_x, new_y, extra);
 505                 FREE(last_motion_notify);
 506         }
 507 done:
 508         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 509         xcb_flush(conn);
 510 }
 511
 512 #if 0
 513 /*
 514  * Changes focus in the given direction for floating clients.
 515  *
 516  * Changing to the left/right means going to the previous/next floating client,
 517  * changing to top/bottom means cycling through the Z-index.
 518  *
 519  */
 520 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 521         DLOG("floating focus\n");
 522
 523         if (direction == D_LEFT || direction == D_RIGHT) {
 524                 /* Go to the next/previous floating client */
 525                 Client *client;
 526
 527                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 528                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 529                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 530                         if (!client->floating)
 531                                 continue;
 532                         set_focus(conn, client, true);
 533                         return;
 534                 }
 535         }
 536 }
 537
 538 /*
 539  * Moves the client 10px to the specified direction.
 540  *
 541  */
 542 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 543         DLOG("floating move\n");
 544
 545         Rect destination = currently_focused->rect;
 546         Rect *screen = &(currently_focused->workspace->output->rect);
 547
 548         switch (direction) {
 549                 case D_LEFT:
 550                         destination.x -= 10;
 551                         break;
 552                 case D_RIGHT:
 553                         destination.x += 10;
 554                         break;
 555                 case D_UP:
 556                         destination.y -= 10;
 557                         break;
 558                 case D_DOWN:
 559                         destination.y += 10;
 560                         break;
 561                 /* to make static analyzers happy */
 562                 default:
 563                         break;
 564         }
 565
 566         /* Prevent windows from vanishing completely */
 567         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 568             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 569             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 570             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 571                 DLOG("boundary check failed, not moving\n");
 572                 return;
 573         }
 574
 575         currently_focused->rect = destination;
 576         reposition_client(conn, currently_focused);
 577
 578         /* Because reposition_client does not send a faked configure event (only resize does),
 579          * we need to initiate that on our own */
 580         fake_absolute_configure_notify(conn, currently_focused);
 581         /* fake_absolute_configure_notify flushes */
 582 }
 583
 584 /*
 585  * Hides all floating clients (or show them if they are currently hidden) on
 586  * the specified workspace.
 587  *
 588  */
 589 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 590         Client *client;
 591
 592         workspace->floating_hidden = !workspace->floating_hidden;
 593         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 594         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 595                 if (workspace->floating_hidden)
 596                         client_unmap(conn, client);
 597                 else client_map(conn, client);
 598         }
 599
 600         /* If we just unmapped all floating windows we should ensure that the focus
 601          * is set correctly, that ist, to the first non-floating client in stack */
 602         if (workspace->floating_hidden)
 603                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 604                         if (client_is_floating(client))
 605                                 continue;
 606                         set_focus(conn, client, true);
 607                         return;
 608                 }
 609
 610         xcb_flush(conn);
 611 }
 612 #endif