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     if (con_is_floating(con)) {
  21         LOG("Container is already in floating mode, not doing anything.\n");
  22         return;
  23     }
  24
  25     /* 1: detach the container from its parent */
  26     /* TODO: refactor this with tree_close() */
  27     TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
  28     TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  29
  30     con_fix_percent(con->parent, WINDOW_REMOVE);
  31
  32     /* 2: create a new container to render the decoration on, add
  33      * it as a floating window to the workspace */
  34     Con *nc = con_new(NULL);
  35     nc->parent = con_get_workspace(con);
  36     nc->rect = con->rect;
  37     nc->orientation = NO_ORIENTATION;
  38     nc->type = CT_FLOATING_CON;
  39     TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
  40     TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
  41
  42     /* 3: attach the child to the new parent container */
  43     con->old_parent = con->parent;
  44     con->parent = nc;
  45     con->floating = FLOATING_USER_ON;
  46     nc->rect.x = 400;
  47     nc->rect.y = 400;
  48     TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
  49     TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  50 }
  51
  52 void floating_disable(Con *con, bool automatic) {
  53     if (!con_is_floating(con)) {
  54         LOG("Container isn't floating, not doing anything.\n");
  55         return;
  56     }
  57
  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     con_fix_percent(con->parent, WINDOW_ADD);
  77 }
  78
  79
  80 /*
  81  * Toggles floating mode for the given container.
  82  *
  83  * If the automatic flag is set to true, this was an automatic update by a change of the
  84  * window class from the application which can be overwritten by the user.
  85  *
  86  */
  87 void toggle_floating_mode(Con *con, bool automatic) {
  88         //i3Font *font = load_font(conn, config.font);
  89
  90         /* see if the client is already floating */
  91         if (con_is_floating(con)) {
  92                 LOG("already floating, re-setting to tiling\n");
  93
  94                 floating_disable(con, automatic);
  95                 return;
  96         }
  97
  98         floating_enable(con, automatic);
  99
 100
 101 #if 0
 102         if (client->dock) {
 103                 DLOG("Not putting dock client into floating mode\n");
 104                 return;
 105         }
 106
 107         if (con == NULL) {
 108                 DLOG("This client is already in floating (container == NULL), re-inserting\n");
 109                 Client *next_tiling;
 110                 Workspace *ws = client->workspace;
 111                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
 112                         if (!client_is_floating(next_tiling))
 113                                 break;
 114                 /* If there are no tiling clients on this workspace, there can only be one
 115                  * container: the first one */
 116                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
 117                         con = ws->table[0][0];
 118                 else con = next_tiling->container;
 119
 120                 /* Remove the client from the list of floating clients */
 121                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
 122
 123                 DLOG("destination container = %p\n", con);
 124                 Client *old_focused = con->currently_focused;
 125                 /* Preserve position/size */
 126                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
 127
 128                 client->floating = FLOATING_USER_OFF;
 129                 client->container = con;
 130
 131                 if (old_focused != NULL && !old_focused->dock)
 132                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
 133                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
 134
 135                 DLOG("Re-inserted the window.\n");
 136                 con->currently_focused = client;
 137
 138                 client_set_below_floating(conn, client);
 139
 140                 render_container(conn, con);
 141                 xcb_flush(conn);
 142
 143                 return;
 144         }
 145
 146         DLOG("Entering floating for client %08x\n", client->child);
 147
 148         /* Remove the client of its container */
 149         client_remove_from_container(conn, client, con, false);
 150         client->container = NULL;
 151
 152         /* Add the client to the list of floating clients for its workspace */
 153         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 154
 155         if (con->currently_focused == client) {
 156                 DLOG("Need to re-adjust currently_focused\n");
 157                 /* Get the next client in the focus stack for this particular container */
 158                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 159         }
 160
 161         if (automatic)
 162                 client->floating = FLOATING_AUTO_ON;
 163         else client->floating = FLOATING_USER_ON;
 164
 165         /* Initialize the floating position from the position in tiling mode, if this
 166          * client never was floating (x == -1) */
 167         if (client->floating_rect.x == -1) {
 168                 /* Copy over the position */
 169                 client->floating_rect.x = client->rect.x;
 170                 client->floating_rect.y = client->rect.y;
 171
 172                 /* Copy size the other direction */
 173                 client->child_rect.width = client->floating_rect.width;
 174                 client->child_rect.height = client->floating_rect.height;
 175
 176                 client->rect.width = client->child_rect.width + 2 + 2;
 177                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 178
 179                 DLOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 180                                 client->floating_rect.width, client->floating_rect.height);
 181         } else {
 182                 /* If the client was already in floating before we restore the old position / size */
 183                 DLOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 184                         client->floating_rect.width, client->floating_rect.height);
 185                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 186         }
 187
 188         /* Raise the client */
 189         xcb_raise_window(conn, client->frame);
 190         reposition_client(conn, client);
 191         resize_client(conn, client);
 192         /* redecorate_window flushes */
 193         redecorate_window(conn, client);
 194
 195         /* Re-render the tiling layout of this container */
 196         render_container(conn, con);
 197         xcb_flush(conn);
 198 #endif
 199 }
 200
 201 #if 0
 202 /*
 203  * Removes the floating client from its workspace and attaches it to the new workspace.
 204  * This is centralized here because it may happen if you move it via keyboard and
 205  * if you move it using your mouse.
 206  *
 207  */
 208 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 209         /* Remove from focus stack and list of floating clients */
 210         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 211         TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
 212
 213         if (client->workspace->fullscreen_client == client)
 214                 client->workspace->fullscreen_client = NULL;
 215
 216         /* Insert into destination focus stack and list of floating clients */
 217         client->workspace = new_workspace;
 218         SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients);
 219         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 220         if (client->fullscreen)
 221                 client->workspace->fullscreen_client = client;
 222 }
 223
 224 /*
 225  * This is an ugly data structure which we need because there is no standard
 226  * way of having nested functions (only available as a gcc extension at the
 227  * moment, clang doesn’t support it) or blocks (only available as a clang
 228  * extension and only on Mac OS X systems at the moment).
 229  *
 230  */
 231 struct resize_callback_params {
 232         border_t border;
 233         xcb_button_press_event_t *event;
 234 };
 235
 236 DRAGGING_CB(resize_callback) {
 237         struct resize_callback_params *params = extra;
 238         xcb_button_press_event_t *event = params->event;
 239         switch (params->border) {
 240                 case BORDER_RIGHT: {
 241                         int new_width = old_rect->width + (new_x - event->root_x);
 242                         if ((new_width < 0) ||
 243                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 244                                 return;
 245                         client->rect.width = new_width;
 246                         break;
 247                 }
 248
 249                 case BORDER_BOTTOM: {
 250                         int new_height = old_rect->height + (new_y - event->root_y);
 251                         if ((new_height < 0) ||
 252                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 253                                 return;
 254                         client->rect.height = old_rect->height + (new_y - event->root_y);
 255                         break;
 256                 }
 257
 258                 case BORDER_TOP: {
 259                         int new_height = old_rect->height + (event->root_y - new_y);
 260                         if ((new_height < 0) ||
 261                             (new_height < client_min_height(client) && client->rect.height >= new_height))
 262                                 return;
 263
 264                         client->rect.y = old_rect->y + (new_y - event->root_y);
 265                         client->rect.height = new_height;
 266                         break;
 267                 }
 268
 269                 case BORDER_LEFT: {
 270                         int new_width = old_rect->width + (event->root_x - new_x);
 271                         if ((new_width < 0) ||
 272                             (new_width < client_min_width(client) && client->rect.width >= new_width))
 273                                 return;
 274                         client->rect.x = old_rect->x + (new_x - event->root_x);
 275                         client->rect.width = new_width;
 276                         break;
 277                 }
 278         }
 279
 280         /* Push the new position/size to X11 */
 281         reposition_client(conn, client);
 282         resize_client(conn, client);
 283         xcb_flush(conn);
 284 }
 285
 286
 287 /*
 288  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 289  * Determines on which border the user clicked and launches the drag_pointer function
 290  * with the resize_callback.
 291  *
 292  */
 293 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 294         DLOG("floating border click\n");
 295
 296         border_t border;
 297
 298         if (event->event_y < 2)
 299                 border = BORDER_TOP;
 300         else if (event->event_y >= (client->rect.height - 2))
 301                 border = BORDER_BOTTOM;
 302         else if (event->event_x <= 2)
 303                 border = BORDER_LEFT;
 304         else if (event->event_x >= (client->rect.width - 2))
 305                 border = BORDER_RIGHT;
 306         else {
 307                 DLOG("Not on any border, not doing anything.\n");
 308                 return 1;
 309         }
 310
 311         DLOG("border = %d\n", border);
 312
 313         struct resize_callback_params params = { border, event };
 314
 315         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback, &params);
 316
 317         return 1;
 318 }
 319
 320 #endif
 321 DRAGGING_CB(drag_window_callback) {
 322         struct xcb_button_press_event_t *event = extra;
 323
 324         /* Reposition the client correctly while moving */
 325         con->rect.x = old_rect->x + (new_x - event->root_x);
 326         con->rect.y = old_rect->y + (new_y - event->root_y);
 327         /* TODO: don’t re-render the whole tree just because we change
 328          * coordinates of a floating window */
 329         tree_render();
 330         x_push_changes(croot);
 331 }
 332
 333 /*
 334  * Called when the user clicked on the titlebar of a floating window.
 335  * Calls the drag_pointer function with the drag_window callback
 336  *
 337  */
 338 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
 339         DLOG("floating_drag_window\n");
 340
 341         drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
 342         tree_render();
 343 }
 344
 345 /*
 346  * This is an ugly data structure which we need because there is no standard
 347  * way of having nested functions (only available as a gcc extension at the
 348  * moment, clang doesn’t support it) or blocks (only available as a clang
 349  * extension and only on Mac OS X systems at the moment).
 350  *
 351  */
 352 struct resize_window_callback_params {
 353     border_t corner;
 354     bool proportional;
 355     xcb_button_press_event_t *event;
 356 };
 357
 358 DRAGGING_CB(resize_window_callback) {
 359     struct resize_window_callback_params *params = extra;
 360     xcb_button_press_event_t *event = params->event;
 361     border_t corner = params->corner;
 362
 363     int32_t dest_x = con->rect.x;
 364     int32_t dest_y = con->rect.y;
 365     uint32_t dest_width;
 366     uint32_t dest_height;
 367
 368     double ratio = (double) old_rect->width / old_rect->height;
 369
 370     /* First guess: We resize by exactly the amount the mouse moved,
 371      * taking into account in which corner the client was grabbed */
 372     if (corner & BORDER_LEFT)
 373             dest_width = old_rect->width - (new_x - event->root_x);
 374     else dest_width = old_rect->width + (new_x - event->root_x);
 375
 376     if (corner & BORDER_TOP)
 377             dest_height = old_rect->height - (new_y - event->root_y);
 378     else dest_height = old_rect->height + (new_y - event->root_y);
 379
 380     /* TODO: minimum window size */
 381 #if 0
 382     /* Obey minimum window size */
 383     dest_width = max(dest_width, client_min_width(client));
 384     dest_height = max(dest_height, client_min_height(client));
 385 #endif
 386
 387     /* User wants to keep proportions, so we may have to adjust our values */
 388     if (params->proportional) {
 389             dest_width = max(dest_width, (int) (dest_height * ratio));
 390             dest_height = max(dest_height, (int) (dest_width / ratio));
 391     }
 392
 393     /* If not the lower right corner is grabbed, we must also reposition
 394      * the client by exactly the amount we resized it */
 395     if (corner & BORDER_LEFT)
 396             dest_x = old_rect->x + (old_rect->width - dest_width);
 397
 398     if (corner & BORDER_TOP)
 399             dest_y = old_rect->y + (old_rect->height - dest_height);
 400
 401     con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
 402
 403     /* TODO: don’t re-render the whole tree just because we change
 404      * coordinates of a floating window */
 405     tree_render();
 406     x_push_changes(croot);
 407 }
 408
 409 /*
 410  * Called when the user clicked on a floating window while holding the
 411  * floating_modifier and the right mouse button.
 412  * Calls the drag_pointer function with the resize_window callback
 413  *
 414  */
 415 void floating_resize_window(Con *con, bool proportional,
 416                             xcb_button_press_event_t *event) {
 417     DLOG("floating_resize_window\n");
 418
 419     /* corner saves the nearest corner to the original click. It contains
 420      * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
 421     border_t corner = 0;
 422
 423     if (event->event_x <= (con->rect.width / 2))
 424             corner |= BORDER_LEFT;
 425     else corner |= BORDER_RIGHT;
 426
 427     if (event->event_y <= (con->rect.height / 2))
 428             corner |= BORDER_TOP;
 429     else corner |= BORDER_RIGHT;
 430
 431     struct resize_window_callback_params params = { corner, proportional, event };
 432
 433     drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
 434 }
 435
 436 /*
 437  * This function grabs your pointer and lets you drag stuff around (borders).
 438  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 439  * and the given callback will be called with the parameters specified (client,
 440  * border on which the click originally was), the original rect of the client,
 441  * the event and the new coordinates (x, y).
 442  *
 443  */
 444 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
 445                 confine_to, border_t border, callback_t callback, void *extra)
 446 {
 447         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 448         uint32_t new_x, new_y;
 449         Rect old_rect;
 450         if (con != NULL)
 451                 memcpy(&old_rect, &(con->rect), sizeof(Rect));
 452
 453         /* Grab the pointer */
 454         /* TODO: returncode */
 455         xcb_grab_pointer(conn,
 456                         false,               /* get all pointer events specified by the following mask */
 457                         root,                /* grab the root window */
 458                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 459                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 460                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 461                         confine_to,          /* confine_to = in which window should the cursor stay */
 462                         XCB_NONE,            /* don’t display a special cursor */
 463                         XCB_CURRENT_TIME);
 464
 465         /* Go into our own event loop */
 466         xcb_flush(conn);
 467
 468         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 469         /* I’ve always wanted to have my own eventhandler… */
 470         while ((inside_event = xcb_wait_for_event(conn))) {
 471                 /* We now handle all events we can get using xcb_poll_for_event */
 472                 do {
 473                         /* Same as get_event_handler in xcb */
 474                         int nr = inside_event->response_type;
 475                         if (nr == 0) {
 476                                 /* An error occured */
 477                                 //handle_event(NULL, conn, inside_event);
 478                                 free(inside_event);
 479                                 continue;
 480                         }
 481                         assert(nr < 256);
 482                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 483                         assert(nr >= 2);
 484
 485                         switch (nr) {
 486                                 case XCB_BUTTON_RELEASE:
 487                                         goto done;
 488
 489                                 case XCB_MOTION_NOTIFY:
 490                                         /* motion_notify events are saved for later */
 491                                         FREE(last_motion_notify);
 492                                         last_motion_notify = inside_event;
 493                                         break;
 494
 495                                 case XCB_UNMAP_NOTIFY:
 496                                         DLOG("Unmap-notify, aborting\n");
 497                                         xcb_event_handle(&evenths, inside_event);
 498                                         goto done;
 499
 500                                 default:
 501                                         DLOG("Passing to original handler\n");
 502                                         /* Use original handler */
 503                                         xcb_event_handle(&evenths, inside_event);
 504                                         break;
 505                         }
 506                         if (last_motion_notify != inside_event)
 507                                 free(inside_event);
 508                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 509
 510                 if (last_motion_notify == NULL)
 511                         continue;
 512
 513                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 514                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 515
 516                 callback(con, &old_rect, new_x, new_y, extra);
 517                 FREE(last_motion_notify);
 518         }
 519 done:
 520         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 521         xcb_flush(conn);
 522 }
 523
 524 #if 0
 525 /*
 526  * Changes focus in the given direction for floating clients.
 527  *
 528  * Changing to the left/right means going to the previous/next floating client,
 529  * changing to top/bottom means cycling through the Z-index.
 530  *
 531  */
 532 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 533         DLOG("floating focus\n");
 534
 535         if (direction == D_LEFT || direction == D_RIGHT) {
 536                 /* Go to the next/previous floating client */
 537                 Client *client;
 538
 539                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 540                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 541                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 542                         if (!client->floating)
 543                                 continue;
 544                         set_focus(conn, client, true);
 545                         return;
 546                 }
 547         }
 548 }
 549
 550 /*
 551  * Moves the client 10px to the specified direction.
 552  *
 553  */
 554 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 555         DLOG("floating move\n");
 556
 557         Rect destination = currently_focused->rect;
 558         Rect *screen = &(currently_focused->workspace->output->rect);
 559
 560         switch (direction) {
 561                 case D_LEFT:
 562                         destination.x -= 10;
 563                         break;
 564                 case D_RIGHT:
 565                         destination.x += 10;
 566                         break;
 567                 case D_UP:
 568                         destination.y -= 10;
 569                         break;
 570                 case D_DOWN:
 571                         destination.y += 10;
 572                         break;
 573                 /* to make static analyzers happy */
 574                 default:
 575                         break;
 576         }
 577
 578         /* Prevent windows from vanishing completely */
 579         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 580             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 581             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 582             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 583                 DLOG("boundary check failed, not moving\n");
 584                 return;
 585         }
 586
 587         currently_focused->rect = destination;
 588         reposition_client(conn, currently_focused);
 589
 590         /* Because reposition_client does not send a faked configure event (only resize does),
 591          * we need to initiate that on our own */
 592         fake_absolute_configure_notify(conn, currently_focused);
 593         /* fake_absolute_configure_notify flushes */
 594 }
 595
 596 /*
 597  * Hides all floating clients (or show them if they are currently hidden) on
 598  * the specified workspace.
 599  *
 600  */
 601 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 602         Client *client;
 603
 604         workspace->floating_hidden = !workspace->floating_hidden;
 605         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 606         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 607                 if (workspace->floating_hidden)
 608                         client_unmap(conn, client);
 609                 else client_map(conn, client);
 610         }
 611
 612         /* If we just unmapped all floating windows we should ensure that the focus
 613          * is set correctly, that ist, to the first non-floating client in stack */
 614         if (workspace->floating_hidden)
 615                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 616                         if (client_is_floating(client))
 617                                 continue;
 618                         set_focus(conn, client, true);
 619                         return;
 620                 }
 621
 622         xcb_flush(conn);
 623 }
 624 #endif