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