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
  29 /* On which border was the dragging initiated? */
  30 typedef enum { BORDER_LEFT, BORDER_RIGHT, BORDER_TOP, BORDER_BOTTOM} border_t;
  31 /* Callback for dragging */
  32 typedef void(*callback_t)(Rect*, uint32_t, uint32_t);
  33
  34 /* Forward definitions */
  35 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
  36                          border_t border, callback_t callback);
  37
  38 /*
  39  * Toggles floating mode for the given client.
  40  * Correctly takes care of the position/size (separately stored for tiling/floating mode)
  41  * and repositions/resizes/redecorates the client.
  42  *
  43  * If the automatic flag is set to true, this was an automatic update by a change of the
  44  * window class from the application which can be overwritten by the user.
  45  *
  46  */
  47 void toggle_floating_mode(xcb_connection_t *conn, Client *client, bool automatic) {
  48         Container *con = client->container;
  49         i3Font *font = load_font(conn, config.font);
  50
  51         if (con == NULL) {
  52                 LOG("This client is already in floating (container == NULL), re-inserting\n");
  53                 Client *next_tiling;
  54                 SLIST_FOREACH(next_tiling, &(client->workspace->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(&(client->workspace->focus_stack)))
  60                         con = client->workspace->table[0][0];
  61                 else con = next_tiling->container;
  62
  63                 /* Remove the client from the list of floating clients */
  64                 TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
  65
  66                 LOG("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                 LOG("Re-inserted the client into the matrix.\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         LOG("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                 LOG("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                 LOG("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                 LOG("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 /*
 167  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 168  * Determines on which border the user clicked and launches the drag_pointer function
 169  * with the resize_callback.
 170  *
 171  */
 172 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 173
 174         LOG("floating border click\n");
 175
 176         border_t border;
 177
 178         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 179                 switch (border) {
 180                         case BORDER_RIGHT: {
 181                                 int new_width = old_rect->width + (new_x - event->root_x);
 182                                 if ((new_width < 0) ||
 183                                     (new_width < 50 && client->rect.width >= new_width))
 184                                         return;
 185                                 client->rect.width = new_width;
 186                                 break;
 187                         }
 188
 189                         case BORDER_BOTTOM: {
 190                                 int new_height = old_rect->height + (new_y - event->root_y);
 191                                 if ((new_height < 0) ||
 192                                     (new_height < 20 && client->rect.height >= new_height))
 193                                         return;
 194                                 client->rect.height = old_rect->height + (new_y - event->root_y);
 195                                 break;
 196                         }
 197
 198                         case BORDER_TOP: {
 199                                 int new_height = old_rect->height + (event->root_y - new_y);
 200                                 if ((new_height < 0) ||
 201                                     (new_height < 20 && client->rect.height >= new_height))
 202                                         return;
 203
 204                                 client->rect.y = old_rect->y + (new_y - event->root_y);
 205                                 client->rect.height = new_height;
 206                                 break;
 207                         }
 208
 209                         case BORDER_LEFT: {
 210                                 int new_width = old_rect->width + (event->root_x - new_x);
 211                                 if ((new_width < 0) ||
 212                                     (new_width < 50 && client->rect.width >= new_width))
 213                                         return;
 214                                 client->rect.x = old_rect->x + (new_x - event->root_x);
 215                                 client->rect.width = new_width;
 216                                 break;
 217                         }
 218                 }
 219
 220                 /* Push the new position/size to X11 */
 221                 reposition_client(conn, client);
 222                 resize_client(conn, client);
 223                 xcb_flush(conn);
 224         }
 225
 226         if (event->event_y < 2)
 227                 border = BORDER_TOP;
 228         else if (event->event_y >= (client->rect.height - 2))
 229                 border = BORDER_BOTTOM;
 230         else if (event->event_x <= 2)
 231                 border = BORDER_LEFT;
 232         else if (event->event_x > 2)
 233                 border = BORDER_RIGHT;
 234         else {
 235                 LOG("Not on any border, not doing anything.\n");
 236                 return 1;
 237         }
 238
 239         LOG("border = %d\n", border);
 240
 241         drag_pointer(conn, client, event, border, resize_callback);
 242
 243         return 1;
 244 }
 245
 246
 247 /*
 248  * Called when the user clicked on the titlebar of a floating window.
 249  * Calls the drag_pointer function with the drag_window callback
 250  *
 251  */
 252 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 253         LOG("floating_drag_window\n");
 254
 255         void drag_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 256                 /* Reposition the client correctly while moving */
 257                 client->rect.x = old_rect->x + (new_x - event->root_x);
 258                 client->rect.y = old_rect->y + (new_y - event->root_y);
 259                 reposition_client(conn, client);
 260                 /* Because reposition_client does not send a faked configure event (only resize does),
 261                  * we need to initiate that on our own */
 262                 fake_absolute_configure_notify(conn, client);
 263                 /* fake_absolute_configure_notify flushes */
 264         }
 265
 266
 267         drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
 268 }
 269
 270 /*
 271  * This function grabs your pointer and lets you drag stuff around (borders).
 272  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 273  * and the given callback will be called with the parameters specified (client,
 274  * border on which the click originally was), the original rect of the client,
 275  * the event and the new coordinates (x, y).
 276  *
 277  */
 278 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 279                          border_t border, callback_t callback) {
 280         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 281         uint32_t new_x, new_y;
 282         Rect old_rect;
 283         memcpy(&old_rect, &(client->rect), sizeof(Rect));
 284
 285         /* Grab the pointer */
 286         /* TODO: returncode */
 287         xcb_grab_pointer(conn,
 288                         false,               /* get all pointer events specified by the following mask */
 289                         root,                /* grab the root window */
 290                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 291                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 292                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 293                         XCB_NONE,            /* confine_to = in which window should the cursor stay */
 294                         XCB_NONE,            /* don’t display a special cursor */
 295                         XCB_CURRENT_TIME);
 296
 297         /* Go into our own event loop */
 298         xcb_flush(conn);
 299
 300         xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
 301         /* I’ve always wanted to have my own eventhandler… */
 302         while ((inside_event = xcb_wait_for_event(conn))) {
 303                 /* We now handle all events we can get using xcb_poll_for_event */
 304                 do {
 305                         /* Same as get_event_handler in xcb */
 306                         int nr = inside_event->response_type;
 307                         if (nr == 0) {
 308                                 /* An error occured */
 309                                 handle_event(NULL, conn, inside_event);
 310                                 free(inside_event);
 311                                 continue;
 312                         }
 313                         assert(nr < 256);
 314                         nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 315                         assert(nr >= 2);
 316
 317                         switch (nr) {
 318                                 case XCB_BUTTON_RELEASE:
 319                                         goto done;
 320
 321                                 case XCB_MOTION_NOTIFY:
 322                                         /* motion_notify events are saved for later */
 323                                         FREE(last_motion_notify);
 324                                         last_motion_notify = inside_event;
 325
 326                                         break;
 327                                 default:
 328                                         LOG("Passing to original handler\n");
 329                                         /* Use original handler */
 330                                         xcb_event_handle(&evenths, inside_event);
 331                                         break;
 332                         }
 333                         if (last_motion_notify != inside_event)
 334                                 free(inside_event);
 335                 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
 336
 337                 if (last_motion_notify == NULL)
 338                         continue;
 339
 340                 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
 341                 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
 342
 343                 callback(&old_rect, new_x, new_y);
 344                 FREE(last_motion_notify);
 345         }
 346 done:
 347         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 348         xcb_flush(conn);
 349 }
 350
 351 /*
 352  * Changes focus in the given direction for floating clients.
 353  *
 354  * Changing to the left/right means going to the previous/next floating client,
 355  * changing to top/bottom means cycling through the Z-index.
 356  *
 357  */
 358 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 359         LOG("floating focus\n");
 360
 361         if (direction == D_LEFT || direction == D_RIGHT) {
 362                 /* Go to the next/previous floating client */
 363                 Client *client;
 364
 365                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 366                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 367                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 368                         if (!client->floating)
 369                                 continue;
 370                         set_focus(conn, client, true);
 371                         return;
 372                 }
 373         }
 374 }
 375
 376 /*
 377  * Moves the client 10px to the specified direction.
 378  *
 379  */
 380 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 381         LOG("floating move\n");
 382
 383         switch (direction) {
 384                 case D_LEFT:
 385                         if (currently_focused->rect.x < 10)
 386                                 return;
 387                         currently_focused->rect.x -= 10;
 388                         break;
 389                 case D_RIGHT:
 390                         currently_focused->rect.x += 10;
 391                         break;
 392                 case D_UP:
 393                         if (currently_focused->rect.y < 10)
 394                                 return;
 395                         currently_focused->rect.y -= 10;
 396                         break;
 397                 case D_DOWN:
 398                         currently_focused->rect.y += 10;
 399                         break;
 400                 /* to make static analyzers happy */
 401                 default:
 402                         break;
 403         }
 404
 405         reposition_client(conn, currently_focused);
 406
 407         /* Because reposition_client does not send a faked configure event (only resize does),
 408          * we need to initiate that on our own */
 409         fake_absolute_configure_notify(conn, currently_focused);
 410         /* fake_absolute_configure_notify flushes */
 411 }
 412
 413 /*
 414  * Hides all floating clients (or show them if they are currently hidden) on
 415  * the specified workspace.
 416  *
 417  */
 418 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 419         Client *client;
 420
 421         workspace->floating_hidden = !workspace->floating_hidden;
 422         LOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 423         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 424                 if (workspace->floating_hidden)
 425                         xcb_unmap_window(conn, client->frame);
 426                 else xcb_map_window(conn, client->frame);
 427         }
 428
 429         /* If we just unmapped all floating windows we should ensure that the focus
 430          * is set correctly, that ist, to the first non-floating client in stack */
 431         if (workspace->floating_hidden)
 432                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
 433                         if (client_is_floating(client))
 434                                 continue;
 435                         set_focus(conn, client, true);
 436                         return;
 437                 }
 438
 439         xcb_flush(conn);
 440 }