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 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 #include <stdlib.h>
  14 #include <string.h>
  15 #include <assert.h>
  16
  17 #include <xcb/xcb.h>
  18 #include <xcb/xcb_event.h>
  19
  20 #include "i3.h"
  21 #include "config.h"
  22 #include "data.h"
  23 #include "util.h"
  24 #include "xcb.h"
  25 #include "debug.h"
  26 #include "layout.h"
  27 #include "client.h"
  28 #include "floating.h"
  29 #include "workspace.h"
  30 #include "log.h"
  31
  32 /*
  33  * Toggles floating mode for the given client.
  34  * Correctly takes care of the position/size (separately stored for tiling/floating mode)
  35  * and repositions/resizes/redecorates the client.
  36  *
  37  * If the automatic flag is set to true, this was an automatic update by a change of the
  38  * window class from the application which can be overwritten by the user.
  39  *
  40  */
  41 void toggle_floating_mode(xcb_connection_t *conn, Client *client, bool automatic) {
  42         Container *con = client->container;
  43         i3Font *font = load_font(conn, config.font);
  44
  45         if (client->dock) {
  46                 DLOG("Not putting dock client into floating mode\n");
  47                 return;
  48         }
  49
  50         if (con == NULL) {
  51                 DLOG("This client is already in floating (container == NULL), re-inserting\n");
  52                 Client *next_tiling;
  53                 Workspace *ws = client->workspace;
  54                 SLIST_FOREACH(next_tiling, &(ws->focus_stack), focus_clients)
  55                         if (!client_is_floating(next_tiling))
  56                                 break;
  57                 /* If there are no tiling clients on this workspace, there can only be one
  58                  * container: the first one */
  59                 if (next_tiling == TAILQ_END(&(ws->focus_stack)))
  60                         con = ws->table[0][0];
  61                 else con = next_tiling->container;
  62
  63                 /* Remove the client from the list of floating clients */
  64                 TAILQ_REMOVE(&(ws->floating_clients), client, floating_clients);
  65
  66                 DLOG("destination container = %p\n", con);
  67                 Client *old_focused = con->currently_focused;
  68                 /* Preserve position/size */
  69                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  70
  71                 client->floating = FLOATING_USER_OFF;
  72                 client->container = con;
  73
  74                 if (old_focused != NULL && !old_focused->dock)
  75                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
  76                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
  77
  78                 DLOG("Re-inserted the window.\n");
  79                 con->currently_focused = client;
  80
  81                 client_set_below_floating(conn, client);
  82
  83                 render_container(conn, con);
  84                 xcb_flush(conn);
  85
  86                 return;
  87         }
  88
  89         DLOG("Entering floating for client %08x\n", client->child);
  90
  91         /* Remove the client of its container */
  92         client_remove_from_container(conn, client, con, false);
  93         client->container = NULL;
  94
  95         /* Add the client to the list of floating clients for its workspace */
  96         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
  97
  98         if (con->currently_focused == client) {
  99                 DLOG("Need to re-adjust currently_focused\n");
 100                 /* Get the next client in the focus stack for this particular container */
 101                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 102         }
 103
 104         if (automatic)
 105                 client->floating = FLOATING_AUTO_ON;
 106         else client->floating = FLOATING_USER_ON;
 107
 108         /* Initialize the floating position from the position in tiling mode, if this
 109          * client never was floating (x == -1) */
 110         if (client->floating_rect.x == -1) {
 111                 /* Copy over the position */
 112                 client->floating_rect.x = client->rect.x;
 113                 client->floating_rect.y = client->rect.y;
 114
 115                 /* Copy size the other direction */
 116                 client->child_rect.width = client->floating_rect.width;
 117                 client->child_rect.height = client->floating_rect.height;
 118
 119                 client->rect.width = client->child_rect.width + 2 + 2;
 120                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 121
 122                 DLOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 123                                 client->floating_rect.width, client->floating_rect.height);
 124         } else {
 125                 /* If the client was already in floating before we restore the old position / size */
 126                 DLOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 127                         client->floating_rect.width, client->floating_rect.height);
 128                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 129         }
 130
 131         /* Raise the client */
 132         xcb_raise_window(conn, client->frame);
 133         reposition_client(conn, client);
 134         resize_client(conn, client);
 135         /* redecorate_window flushes */
 136         redecorate_window(conn, client);
 137
 138         /* Re-render the tiling layout of this container */
 139         render_container(conn, con);
 140         xcb_flush(conn);
 141 }
 142
 143 /*
 144  * Removes the floating client from its workspace and attaches it to the new workspace.
 145  * This is centralized here because it may happen if you move it via keyboard and
 146  * if you move it using your mouse.
 147  *
 148  */
 149 void floating_assign_to_workspace(Client *client, Workspace *new_workspace) {
 150         /* Remove from focus stack and list of floating clients */
 151         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 152         TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
 153
 154         if (client->workspace->fullscreen_client == client)
 155                 client->workspace->fullscreen_client = NULL;
 156
 157         /* Insert into destination focus stack and list of floating clients */
 158         client->workspace = new_workspace;
 159         SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients);
 160         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
 161         if (client->fullscreen)
 162                 client->workspace->fullscreen_client = client;
 163 }
 164
 165 /*
 166  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 167  * Determines on which border the user clicked and launches the drag_pointer function
 168  * with the resize_callback.
 169  *
 170  */
 171 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 172         DLOG("floating border click\n");
 173
 174         border_t border;
 175
 176         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 177                 switch (border) {
 178                         case BORDER_RIGHT: {
 179                                 int new_width = old_rect->width + (new_x - event->root_x);
 180                                 if ((new_width < 0) ||
 181                                     (new_width < client_min_width(client) && client->rect.width >= new_width))
 182                                         return;
 183                                 client->rect.width = new_width;
 184                                 break;
 185                         }
 186
 187                         case BORDER_BOTTOM: {
 188                                 int new_height = old_rect->height + (new_y - event->root_y);
 189                                 if ((new_height < 0) ||
 190                                     (new_height < client_min_height(client) && client->rect.height >= new_height))
 191                                         return;
 192                                 client->rect.height = old_rect->height + (new_y - event->root_y);
 193                                 break;
 194                         }
 195
 196                         case BORDER_TOP: {
 197                                 int new_height = old_rect->height + (event->root_y - new_y);
 198                                 if ((new_height < 0) ||
 199                                     (new_height < client_min_height(client) && client->rect.height >= new_height))
 200                                         return;
 201
 202                                 client->rect.y = old_rect->y + (new_y - event->root_y);
 203                                 client->rect.height = new_height;
 204                                 break;
 205                         }
 206
 207                         case BORDER_LEFT: {
 208                                 int new_width = old_rect->width + (event->root_x - new_x);
 209                                 if ((new_width < 0) ||
 210                                     (new_width < client_min_width(client) && client->rect.width >= new_width))
 211                                         return;
 212                                 client->rect.x = old_rect->x + (new_x - event->root_x);
 213                                 client->rect.width = new_width;
 214                                 break;
 215                         }
 216                 }
 217
 218                 /* Push the new position/size to X11 */
 219                 reposition_client(conn, client);
 220                 resize_client(conn, client);
 221                 xcb_flush(conn);
 222         }
 223
 224         if (event->event_y < 2)
 225                 border = BORDER_TOP;
 226         else if (event->event_y >= (client->rect.height - 2))
 227                 border = BORDER_BOTTOM;
 228         else if (event->event_x <= 2)
 229                 border = BORDER_LEFT;
 230         else if (event->event_x >= (client->rect.width - 2))
 231                 border = BORDER_RIGHT;
 232         else {
 233                 DLOG("Not on any border, not doing anything.\n");
 234                 return 1;
 235         }
 236
 237         DLOG("border = %d\n", border);
 238
 239         drag_pointer(conn, client, event, XCB_NONE, border, resize_callback);
 240
 241         return 1;
 242 }
 243
 244
 245 /*
 246  * Called when the user clicked on the titlebar of a floating window.
 247  * Calls the drag_pointer function with the drag_window callback
 248  *
 249  */
 250 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 251         DLOG("floating_drag_window\n");
 252
 253         void drag_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 254                 /* Reposition the client correctly while moving */
 255                 client->rect.x = old_rect->x + (new_x - event->root_x);
 256                 client->rect.y = old_rect->y + (new_y - event->root_y);
 257                 reposition_client(conn, client);
 258                 /* Because reposition_client does not send a faked configure event (only resize does),
 259                  * we need to initiate that on our own */
 260                 fake_absolute_configure_notify(conn, client);
 261                 /* fake_absolute_configure_notify flushes */
 262         }
 263
 264         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback);
 265 }
 266
 267 /*
 268  * Called when the user right-clicked on the titlebar of a floating window to
 269  * resize it.
 270  * Calls the drag_pointer function with the resize_window callback
 271  *
 272  */
 273 void floating_resize_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 274         DLOG("floating_resize_window\n");
 275
 276         void resize_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 277                 int32_t new_width = old_rect->width + (new_x - event->root_x);
 278                 int32_t new_height = old_rect->height + (new_y - event->root_y);
 279
 280                 /* Obey minimum window size and reposition the client */
 281                 if (new_width > 0 && new_width >= client_min_width(client))
 282                         client->rect.width = new_width;
 283
 284                 if (new_height > 0 && new_height >= client_min_height(client))
 285                         client->rect.height = new_height;
 286
 287                 /* resize_client flushes */
 288                 resize_client(conn, client);
 289         }
 290
 291         drag_pointer(conn, client, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback);
 292 }
 293
 294
 295 /*
 296  * This function grabs your pointer and lets you drag stuff around (borders).
 297  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 298  * and the given callback will be called with the parameters specified (client,
 299  * border on which the click originally was), the original rect of the client,
 300  * the event and the new coordinates (x, y).
 301  *
 302  */
 303 void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 304                   xcb_window_t confine_to, border_t border, callback_t callback) {
 305         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 306         uint32_t new_x, new_y;
 307         Rect old_rect;
 308         if (client != NULL)
 309                 memcpy(&old_rect, &(client->rect), sizeof(Rect));
 310
 311         /* Grab the pointer */
 312         /* TODO: returncode */
 313         xcb_grab_pointer(conn,
 314                         false,               /* get all pointer events specified by the following mask */
 315                         root,                /* grab the root window */
 316                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 317                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 318                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 319                         confine_to,          /* confine_to = in which window should the cursor stay */
 320                         XCB_NONE,            /* don’t display a special cursor */
 321                         XCB_CURRENT_TIME);
 322
 323         /* Go into our own event loop */
 324         xcb_flush(conn);
 325
 326         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 327         /* I’ve always wanted to have my own eventhandler… */
 328         while ((inside_event = xcb_wait_for_event(conn))) {
 329                 /* We now handle all events we can get using xcb_poll_for_event */
 330                 do {
 331                         /* Same as get_event_handler in xcb */
 332                         int nr = inside_event->response_type;
 333                         if (nr == 0) {
 334                                 /* An error occured */
 335                                 handle_event(NULL, conn, inside_event);
 336                                 free(inside_event);
 337                                 continue;
 338                         }
 339                         assert(nr < 256);
 340                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 341                         assert(nr >= 2);
 342
 343                         switch (nr) {
 344                                 case XCB_BUTTON_RELEASE:
 345                                         goto done;
 346
 347                                 case XCB_MOTION_NOTIFY:
 348                                         /* motion_notify events are saved for later */
 349                                         FREE(last_motion_notify);
 350                                         last_motion_notify = inside_event;
 351                                         break;
 352
 353                                 case XCB_UNMAP_NOTIFY:
 354                                         DLOG("Unmap-notify, aborting\n");
 355                                         xcb_event_handle(&evenths, inside_event);
 356                                         goto done;
 357
 358                                 default:
 359                                         DLOG("Passing to original handler\n");
 360                                         /* Use original handler */
 361                                         xcb_event_handle(&evenths, inside_event);
 362                                         break;
 363                         }
 364                         if (last_motion_notify != inside_event)
 365                                 free(inside_event);
 366                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 367
 368                 if (last_motion_notify == NULL)
 369                         continue;
 370
 371                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 372                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 373
 374                 callback(&old_rect, new_x, new_y);
 375                 FREE(last_motion_notify);
 376         }
 377 done:
 378         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 379         xcb_flush(conn);
 380 }
 381
 382 /*
 383  * Changes focus in the given direction for floating clients.
 384  *
 385  * Changing to the left/right means going to the previous/next floating client,
 386  * changing to top/bottom means cycling through the Z-index.
 387  *
 388  */
 389 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 390         DLOG("floating focus\n");
 391
 392         if (direction == D_LEFT || direction == D_RIGHT) {
 393                 /* Go to the next/previous floating client */
 394                 Client *client;
 395
 396                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 397                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 398                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 399                         if (!client->floating)
 400                                 continue;
 401                         set_focus(conn, client, true);
 402                         return;
 403                 }
 404         }
 405 }
 406
 407 /*
 408  * Moves the client 10px to the specified direction.
 409  *
 410  */
 411 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 412         DLOG("floating move\n");
 413
 414         Rect destination = currently_focused->rect;
 415         Rect *screen = &(currently_focused->workspace->output->rect);
 416
 417         switch (direction) {
 418                 case D_LEFT:
 419                         destination.x -= 10;
 420                         break;
 421                 case D_RIGHT:
 422                         destination.x += 10;
 423                         break;
 424                 case D_UP:
 425                         destination.y -= 10;
 426                         break;
 427                 case D_DOWN:
 428                         destination.y += 10;
 429                         break;
 430                 /* to make static analyzers happy */
 431                 default:
 432                         break;
 433         }
 434
 435         /* Prevent windows from vanishing completely */
 436         if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
 437             (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
 438             (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
 439             (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
 440                 DLOG("boundary check failed, not moving\n");
 441                 return;
 442         }
 443
 444         currently_focused->rect = destination;
 445         reposition_client(conn, currently_focused);
 446
 447         /* Because reposition_client does not send a faked configure event (only resize does),
 448          * we need to initiate that on our own */
 449         fake_absolute_configure_notify(conn, currently_focused);
 450         /* fake_absolute_configure_notify flushes */
 451 }
 452
 453 /*
 454  * Hides all floating clients (or show them if they are currently hidden) on
 455  * the specified workspace.
 456  *
 457  */
 458 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 459         Client *client;
 460
 461         workspace->floating_hidden = !workspace->floating_hidden;
 462         DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 463         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 464                 if (workspace->floating_hidden)
 465                         client_unmap(conn, client);
 466                 else client_map(conn, client);
 467         }
 468
 469         /* If we just unmapped all floating windows we should ensure that the focus
 470          * is set correctly, that ist, to the first non-floating client in stack */
 471         if (workspace->floating_hidden)
 472                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 473                         if (client_is_floating(client))
 474                                 continue;
 475                         set_focus(conn, client, true);
 476                         return;
 477                 }
 478
 479         xcb_flush(conn);
 480 }