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 *child;
  26     int children = 0;
  27     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes)
  28         children++;
  29     /* TODO: better document why this math works */
  30     double fix = 1.0 / (1.0 - (1.0 / (children+1)));
  31     TAILQ_FOREACH(child, &(con->parent->nodes_head), nodes) {
  32         if (child->percent <= 0.0)
  33             continue;
  34         child->percent *= fix;
  35     }
  36
  37     /* 2: create a new container to render the decoration on, add
  38      * it as a floating window to the workspace */
  39     Con *nc = con_new(NULL);
  40     nc->parent = con_get_workspace(con);
  41     nc->rect = con->rect;
  42     nc->orientation = NO_ORIENTATION;
  43     nc->type = CT_FLOATING_CON;
  44     TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
  45     TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
  46
  47     /* 3: attach the child to the new parent container */
  48     con->old_parent = con->parent;
  49     con->parent = nc;
  50     con->floating = FLOATING_USER_ON;
  51     nc->rect.x = 400;
  52     nc->rect.y = 400;
  53     TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
  54     TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  55 }
  56
  57 void floating_disable(Con *con, bool automatic) {
  58     assert(con->old_parent != NULL);
  59
  60     /* 1: detach from parent container */
  61     TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  62     TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  63
  64     /* 2: kill parent container */
  65     TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
  66     TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
  67     tree_close(con->parent, false);
  68
  69     /* 3: re-attach to previous parent */
  70     con->parent = con->old_parent;
  71     TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
  72     TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
  73
  74     con->floating = FLOATING_USER_OFF;
  75 }
  76
  77
  78 /*
  79  * Toggles floating mode for the given container.
  80  *
  81  * If the automatic flag is set to true, this was an automatic update by a change of the
  82  * window class from the application which can be overwritten by the user.
  83  *
  84  */
  85 void toggle_floating_mode(Con *con, bool automatic) {
  86         //i3Font *font = load_font(conn, config.font);
  87
  88         /* see if the client is already floating */
  89         if (con_is_floating(con)) {
  90                 LOG("already floating, re-setting to tiling\n");
  91
  92                 floating_disable(con, automatic);
  93                 return;
  94         }
  95
  96         floating_enable(con, automatic);
  97
  98
  99 #if 0
 100         if (client->dock) {
 101                 DLOG("Not putting dock client into floating mode\n");
 102                 return;
 103         }
 104
 105         if (con == NULL) {
 106                 DLOG("This client is already in floating (container == NULL), re-inserting\n");
 107                 Client *next_tiling;
 108                 Workspace *ws = client->workspace;
 109                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
 110                         if (!client_is_floating(next_tiling))
 111                                 break;
 112                 /* If there are no tiling clients on this workspace, there can only be one
 113                  * container: the first one */
 114                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
 115                         con = ws->table[0][0];
 116                 else con = next_tiling->container;
 117
 118                 /* Remove the client from the list of floating clients */
 119                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
 120
 121                 DLOG("destination container = %p\n", con);
 122                 Client *old_focused = con->currently_focused;
 123                 /* Preserve position/size */
 124                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
 125
 126                 client->floating = FLOATING_USER_OFF;
 127                 client->container = con;
 128
 129                 if (old_focused != NULL && !old_focused->dock)
 130                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
 131                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
 132
 133                 DLOG("Re-inserted the window.\n");
 134                 con->currently_focused = client;
 135
 136                 client_set_below_floating(conn, client);
 137
 138                 render_container(conn, con);
 139                 xcb_flush(conn);
 140
 141                 return;
 142         }
 143
 144         DLOG("Entering floating for client %08x\n", client->child);
 145
 146         /* Remove the client of its container */
 147         client_remove_from_container(conn, client, con, false);
 148         client->container = NULL;
 149
 150         /* Add the client to the list of floating clients for its workspace */
 151         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 152
 153         if (con->currently_focused == client) {
 154                 DLOG("Need to re-adjust currently_focused\n");
 155                 /* Get the next client in the focus stack for this particular container */
 156                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 157         }
 158
 159         if (automatic)
 160                 client->floating = FLOATING_AUTO_ON;
 161         else client->floating = FLOATING_USER_ON;
 162
 163         /* Initialize the floating position from the position in tiling mode, if this
 164          * client never was floating (x == -1) */
 165         if (client->floating_rect.x == -1) {
 166                 /* Copy over the position */
 167                 client->floating_rect.x = client->rect.x;
 168                 client->floating_rect.y = client->rect.y;
 169
 170                 /* Copy size the other direction */
 171                 client->child_rect.width = client->floating_rect.width;
 172                 client->child_rect.height = client->floating_rect.height;
 173
 174                 client->rect.width = client->child_rect.width + 2 + 2;
 175                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 176
 177                 DLOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 178                                 client->floating_rect.width, client->floating_rect.height);
 179         } else {
 180                 /* If the client was already in floating before we restore the old position / size */
 181                 DLOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 182                         client->floating_rect.width, client->floating_rect.height);
 183                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 184         }
 185
 186         /* Raise the client */
 187         xcb_raise_window(conn, client->frame);
 188         reposition_client(conn, client);
 189         resize_client(conn, client);
 190         /* redecorate_window flushes */
 191         redecorate_window(conn, client);
 192
 193         /* Re-render the tiling layout of this container */
 194         render_container(conn, con);
 195         xcb_flush(conn);
 196 #endif
 197 }
 198
 199 #if 0
 200 /*
 201  * Removes the floating client from its workspace and attaches it to the new workspace.
 202  * This is centralized here because it may happen if you move it via keyboard and
 203  * if you move it using your mouse.
 204  *
 205  */
 206 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 207         /* Remove from focus stack and list of floating clients */
 208         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 209         TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
 210
 211         if (client->workspace->fullscreen_client == client)
 212                 client->workspace->fullscreen_client = NULL;
 213
 214         /* Insert into destination focus stack and list of floating clients */
 215         client->workspace = new_workspace;
 216         SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients);
 217         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 218         if (client->fullscreen)
 219                 client->workspace->fullscreen_client = client;
 220 }
 221
 222 /*
 223  * This is an ugly data structure which we need because there is no standard
 224  * way of having nested functions (only available as a gcc extension at the
 225  * moment, clang doesn’t support it) or blocks (only available as a clang
 226  * extension and only on Mac OS X systems at the moment).
 227  *
 228  */
 229 struct resize_callback_params {
 230         border_t border;
 231         xcb_button_press_event_t *event;
 232 };
 233
 234 DRAGGING_CB(resize_callback) {
 235         struct resize_callback_params *params = extra;
 236         xcb_button_press_event_t *event = params->event;
 237         switch (params->border) {
 238                 case BORDER_RIGHT: {
 239                         int new_width = old_rect->width + (new_x - event->root_x);
 240                         if ((new_width < 0) ||
 241                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 242                                 return;
 243                         client->rect.width = new_width;
 244                         break;
 245                 }
 246
 247                 case BORDER_BOTTOM: {
 248                         int new_height = old_rect->height + (new_y - event->root_y);
 249                         if ((new_height < 0) ||
 250                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 251                                 return;
 252                         client->rect.height = old_rect->height + (new_y - event->root_y);
 253                         break;
 254                 }
 255
 256                 case BORDER_TOP: {
 257                         int new_height = old_rect->height + (event->root_y - new_y);
 258                         if ((new_height < 0) ||
 259                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 260                                 return;
 261
 262                         client->rect.y = old_rect->y + (new_y - event->root_y);
 263                         client->rect.height = new_height;
 264                         break;
 265                 }
 266
 267                 case BORDER_LEFT: {
 268                         int new_width = old_rect->width + (event->root_x - new_x);
 269                         if ((new_width < 0) ||
 270                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 271                                 return;
 272                         client->rect.x = old_rect->x + (new_x - event->root_x);
 273                         client->rect.width = new_width;
 274                         break;
 275                 }
 276         }
 277
 278         /* Push the new position/size to X11 */
 279         reposition_client(conn, client);
 280         resize_client(conn, client);
 281         xcb_flush(conn);
 282 }
 283
 284
 285 /*
 286  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 287  * Determines on which border the user clicked and launches the drag_pointer function
 288  * with the resize_callback.
 289  *
 290  */
 291 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 292         DLOG("floating border click\n");
 293
 294         border_t border;
 295
 296         if (event->event_y < 2)
 297                 border = BORDER_TOP;
 298         else if (event->event_y >= (client->rect.height - 2))
 299                 border = BORDER_BOTTOM;
 300         else if (event->event_x <= 2)
 301                 border = BORDER_LEFT;
 302         else if (event->event_x >= (client->rect.width - 2))
 303                 border = BORDER_RIGHT;
 304         else {
 305                 DLOG("Not on any border, not doing anything.\n");
 306                 return 1;
 307         }
 308
 309         DLOG("border = %d\n", border);
 310
 311         struct resize_callback_params params = { border, event };
 312
 313         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback, &params);
 314
 315         return 1;
 316 }
 317
 318 #endif
 319 DRAGGING_CB(drag_window_callback) {
 320         struct xcb_button_press_event_t *event = extra;
 321
 322         /* Reposition the client correctly while moving */
 323         con->rect.x = old_rect->x + (new_x - event->root_x);
 324         con->rect.y = old_rect->y + (new_y - event->root_y);
 325         /* TODO: don’t re-render the whole tree just because we change
 326          * coordinates of a floating window */
 327         tree_render();
 328         x_push_changes(croot);
 329 }
 330
 331 /*
 332  * Called when the user clicked on the titlebar of a floating window.
 333  * Calls the drag_pointer function with the drag_window callback
 334  *
 335  */
 336 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
 337         DLOG("floating_drag_window\n");
 338
 339         drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
 340         tree_render();
 341 }
 342
 343 /*
 344  * This is an ugly data structure which we need because there is no standard
 345  * way of having nested functions (only available as a gcc extension at the
 346  * moment, clang doesn’t support it) or blocks (only available as a clang
 347  * extension and only on Mac OS X systems at the moment).
 348  *
 349  */
 350 struct resize_window_callback_params {
 351     border_t corner;
 352     bool proportional;
 353     xcb_button_press_event_t *event;
 354 };
 355
 356 DRAGGING_CB(resize_window_callback) {
 357     struct resize_window_callback_params *params = extra;
 358     xcb_button_press_event_t *event = params->event;
 359     border_t corner = params->corner;
 360
 361     int32_t dest_x = con->rect.x;
 362     int32_t dest_y = con->rect.y;
 363     uint32_t dest_width;
 364     uint32_t dest_height;
 365
 366     double ratio = (double) old_rect->width / old_rect->height;
 367
 368     /* First guess: We resize by exactly the amount the mouse moved,
 369      * taking into account in which corner the client was grabbed */
 370     if (corner & BORDER_LEFT)
 371             dest_width = old_rect->width - (new_x - event->root_x);
 372     else dest_width = old_rect->width + (new_x - event->root_x);
 373
 374     if (corner & BORDER_TOP)
 375             dest_height = old_rect->height - (new_y - event->root_y);
 376     else dest_height = old_rect->height + (new_y - event->root_y);
 377
 378     /* TODO: minimum window size */
 379 #if 0
 380     /* Obey minimum window size */
 381     dest_width = max(dest_width, client_min_width(client));
 382     dest_height = max(dest_height, client_min_height(client));
 383 #endif
 384
 385     /* User wants to keep proportions, so we may have to adjust our values */
 386     if (params->proportional) {
 387             dest_width = max(dest_width, (int) (dest_height * ratio));
 388             dest_height = max(dest_height, (int) (dest_width / ratio));
 389     }
 390
 391     /* If not the lower right corner is grabbed, we must also reposition
 392      * the client by exactly the amount we resized it */
 393     if (corner & BORDER_LEFT)
 394             dest_x = old_rect->x + (old_rect->width - dest_width);
 395
 396     if (corner & BORDER_TOP)
 397             dest_y = old_rect->y + (old_rect->height - dest_height);
 398
 399     con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
 400
 401     /* TODO: don’t re-render the whole tree just because we change
 402      * coordinates of a floating window */
 403     tree_render();
 404     x_push_changes(croot);
 405 }
 406
 407 /*
 408  * Called when the user clicked on a floating window while holding the
 409  * floating_modifier and the right mouse button.
 410  * Calls the drag_pointer function with the resize_window callback
 411  *
 412  */
 413 void floating_resize_window(Con *con, bool proportional,
 414                             xcb_button_press_event_t *event) {
 415     DLOG("floating_resize_window\n");
 416
 417     /* corner saves the nearest corner to the original click. It contains
 418      * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
 419     border_t corner = 0;
 420
 421     if (event->event_x <= (con->rect.width / 2))
 422             corner |= BORDER_LEFT;
 423     else corner |= BORDER_RIGHT;
 424
 425     if (event->event_y <= (con->rect.height / 2))
 426             corner |= BORDER_TOP;
 427     else corner |= BORDER_RIGHT;
 428
 429     struct resize_window_callback_params params = { corner, proportional, event };
 430
 431     drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
 432 }
 433
 434 /*
 435  * This function grabs your pointer and lets you drag stuff around (borders).
 436  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 437  * and the given callback will be called with the parameters specified (client,
 438  * border on which the click originally was), the original rect of the client,
 439  * the event and the new coordinates (x, y).
 440  *
 441  */
 442 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
 443                 confine_to, border_t border, callback_t callback, void *extra)
 444 {
 445         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 446         uint32_t new_x, new_y;
 447         Rect old_rect;
 448         if (con != NULL)
 449                 memcpy(&old_rect, &(con->rect), sizeof(Rect));
 450
 451         /* Grab the pointer */
 452         /* TODO: returncode */
 453         xcb_grab_pointer(conn,
 454                         false,               /* get all pointer events specified by the following mask */
 455                         root,                /* grab the root window */
 456                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 457                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 458                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 459                         confine_to,          /* confine_to = in which window should the cursor stay */
 460                         XCB_NONE,            /* don’t display a special cursor */
 461                         XCB_CURRENT_TIME);
 462
 463         /* Go into our own event loop */
 464         xcb_flush(conn);
 465
 466         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 467         /* I’ve always wanted to have my own eventhandler… */
 468         while ((inside_event = xcb_wait_for_event(conn))) {
 469                 /* We now handle all events we can get using xcb_poll_for_event */
 470                 do {
 471                         /* Same as get_event_handler in xcb */
 472                         int nr = inside_event->response_type;
 473                         if (nr == 0) {
 474                                 /* An error occured */
 475                                 //handle_event(NULL, conn, inside_event);
 476                                 free(inside_event);
 477                                 continue;
 478                         }
 479                         assert(nr < 256);
 480                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 481                         assert(nr >= 2);
 482
 483                         switch (nr) {
 484                                 case XCB_BUTTON_RELEASE:
 485                                         goto done;
 486
 487                                 case XCB_MOTION_NOTIFY:
 488                                         /* motion_notify events are saved for later */
 489                                         FREE(last_motion_notify);
 490                                         last_motion_notify = inside_event;
 491                                         break;
 492
 493                                 case XCB_UNMAP_NOTIFY:
 494                                         DLOG("Unmap-notify, aborting\n");
 495                                         xcb_event_handle(&evenths, inside_event);
 496                                         goto done;
 497
 498                                 default:
 499                                         DLOG("Passing to original handler\n");
 500                                         /* Use original handler */
 501                                         xcb_event_handle(&evenths, inside_event);
 502                                         break;
 503                         }
 504                         if (last_motion_notify != inside_event)
 505                                 free(inside_event);
 506                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 507
 508                 if (last_motion_notify == NULL)
 509                         continue;
 510
 511                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 512                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 513
 514                 callback(con, &old_rect, new_x, new_y, extra);
 515                 FREE(last_motion_notify);
 516         }
 517 done:
 518         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 519         xcb_flush(conn);
 520 }
 521
 522 #if 0
 523 /*
 524  * Changes focus in the given direction for floating clients.
 525  *
 526  * Changing to the left/right means going to the previous/next floating client,
 527  * changing to top/bottom means cycling through the Z-index.
 528  *
 529  */
 530 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 531         DLOG("floating focus\n");
 532
 533         if (direction == D_LEFT || direction == D_RIGHT) {
 534                 /* Go to the next/previous floating client */
 535                 Client *client;
 536
 537                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 538                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 539                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 540                         if (!client->floating)
 541                                 continue;
 542                         set_focus(conn, client, true);
 543                         return;
 544                 }
 545         }
 546 }
 547
 548 /*
 549  * Moves the client 10px to the specified direction.
 550  *
 551  */
 552 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 553         DLOG("floating move\n");
 554
 555         Rect destination = currently_focused->rect;
 556         Rect *screen = &(currently_focused->workspace->output->rect);
 557
 558         switch (direction) {
 559                 case D_LEFT:
 560                         destination.x -= 10;
 561                         break;
 562                 case D_RIGHT:
 563                         destination.x += 10;
 564                         break;
 565                 case D_UP:
 566                         destination.y -= 10;
 567                         break;
 568                 case D_DOWN:
 569                         destination.y += 10;
 570                         break;
 571                 /* to make static analyzers happy */
 572                 default:
 573                         break;
 574         }
 575
 576         /* Prevent windows from vanishing completely */
 577         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 578             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 579             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 580             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 581                 DLOG("boundary check failed, not moving\n");
 582                 return;
 583         }
 584
 585         currently_focused->rect = destination;
 586         reposition_client(conn, currently_focused);
 587
 588         /* Because reposition_client does not send a faked configure event (only resize does),
 589          * we need to initiate that on our own */
 590         fake_absolute_configure_notify(conn, currently_focused);
 591         /* fake_absolute_configure_notify flushes */
 592 }
 593
 594 /*
 595  * Hides all floating clients (or show them if they are currently hidden) on
 596  * the specified workspace.
 597  *
 598  */
 599 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 600         Client *client;
 601
 602         workspace->floating_hidden = !workspace->floating_hidden;
 603         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 604         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 605                 if (workspace->floating_hidden)
 606                         client_unmap(conn, client);
 607                 else client_map(conn, client);
 608         }
 609
 610         /* If we just unmapped all floating windows we should ensure that the focus
 611          * is set correctly, that ist, to the first non-floating client in stack */
 612         if (workspace->floating_hidden)
 613                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 614                         if (client_is_floating(client))
 615                                 continue;
 616                         set_focus(conn, client, true);
 617                         return;
 618                 }
 619
 620         xcb_flush(conn);
 621 }
 622 #endif