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 (next_tiling->floating <= FLOATING_USER_OFF)
  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                 render_container(conn, con);
  82                 xcb_flush(conn);
  83
  84                 return;
  85         }
  86
  87         LOG("Entering floating for client %08x\n", client->child);
  88
  89         /* Remove the client of its container */
  90         client_remove_from_container(conn, client, con, false);
  91         client->container = NULL;
  92
  93         /* Add the client to the list of floating clients for its workspace */
  94         TAILQ_INSERT_TAIL(&(client->workspace->floating_clients), client, floating_clients);
  95
  96         if (con->currently_focused == client) {
  97                 LOG("Need to re-adjust currently_focused\n");
  98                 /* Get the next client in the focus stack for this particular container */
  99                 con->currently_focused = get_last_focused_client(conn, con, NULL);
 100         }
 101
 102         if (automatic)
 103                 client->floating = FLOATING_AUTO_ON;
 104         else client->floating = FLOATING_USER_ON;
 105
 106         /* Initialize the floating position from the position in tiling mode, if this
 107          * client never was floating (x == -1) */
 108         if (client->floating_rect.x == -1) {
 109                 /* Copy over the position */
 110                 client->floating_rect.x = client->rect.x;
 111                 client->floating_rect.y = client->rect.y;
 112
 113                 /* Copy size the other direction */
 114                 client->child_rect.width = client->floating_rect.width;
 115                 client->child_rect.height = client->floating_rect.height;
 116
 117                 client->rect.width = client->child_rect.width + 2 + 2;
 118                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 119
 120                 LOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 121                                 client->floating_rect.width, client->floating_rect.height);
 122         } else {
 123                 /* If the client was already in floating before we restore the old position / size */
 124                 LOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 125                         client->floating_rect.width, client->floating_rect.height);
 126                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 127         }
 128
 129         /* Raise the client */
 130         xcb_raise_window(conn, client->frame);
 131         reposition_client(conn, client);
 132         resize_client(conn, client);
 133         /* redecorate_window flushes */
 134         redecorate_window(conn, client);
 135
 136         /* Re-render the tiling layout of this container */
 137         render_container(conn, con);
 138         xcb_flush(conn);
 139 }
 140
 141
 142 /*
 143  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 144  * Determines on which border the user clicked and launches the drag_pointer function
 145  * with the resize_callback.
 146  *
 147  */
 148 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 149
 150         LOG("floating border click\n");
 151
 152         border_t border;
 153
 154         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 155                 switch (border) {
 156                         case BORDER_RIGHT:
 157                                 client->rect.width = old_rect->width + (new_x - event->root_x);
 158                                 break;
 159
 160                         case BORDER_BOTTOM:
 161                                 client->rect.height = old_rect->height + (new_y - event->root_y);
 162                                 break;
 163
 164                         case BORDER_TOP:
 165                                 client->rect.y = old_rect->y + (new_y - event->root_y);
 166                                 client->rect.height = old_rect->height + (event->root_y - new_y);
 167                                 break;
 168
 169                         case BORDER_LEFT:
 170                                 client->rect.x = old_rect->x + (new_x - event->root_x);
 171                                 client->rect.width = old_rect->width + (event->root_x - new_x);
 172                                 break;
 173                 }
 174
 175                 /* Push the new position/size to X11 */
 176                 reposition_client(conn, client);
 177                 resize_client(conn, client);
 178                 xcb_flush(conn);
 179         }
 180
 181         if (event->event_y < 2)
 182                 border = BORDER_TOP;
 183         else if (event->event_y >= (client->rect.height - 2))
 184                 border = BORDER_BOTTOM;
 185         else if (event->event_x <= 2)
 186                 border = BORDER_LEFT;
 187         else if (event->event_x > 2)
 188                 border = BORDER_RIGHT;
 189         else {
 190                 LOG("Not on any border, not doing anything.\n");
 191                 return 1;
 192         }
 193
 194         LOG("border = %d\n", border);
 195
 196         drag_pointer(conn, client, event, border, resize_callback);
 197
 198         return 1;
 199 }
 200
 201
 202 /*
 203  * Called when the user clicked on the titlebar of a floating window.
 204  * Calls the drag_pointer function with the drag_window callback
 205  *
 206  */
 207 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 208         LOG("floating_drag_window\n");
 209
 210         void drag_window_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 211                 /* Reposition the client correctly while moving */
 212                 client->rect.x = old_rect->x + (new_x - event->root_x);
 213                 client->rect.y = old_rect->y + (new_y - event->root_y);
 214                 reposition_client(conn, client);
 215                 /* Because reposition_client does not send a faked configure event (only resize does),
 216                  * we need to initiate that on our own */
 217                 fake_absolute_configure_notify(conn, client);
 218                 /* fake_absolute_configure_notify flushes */
 219         }
 220
 221
 222         drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
 223 }
 224
 225 /*
 226  * This function grabs your pointer and lets you drag stuff around (borders).
 227  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 228  * and the given callback will be called with the parameters specified (client,
 229  * border on which the click originally was), the original rect of the client,
 230  * the event and the new coordinates (x, y).
 231  *
 232  */
 233 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 234                          border_t border, callback_t callback) {
 235         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 236         uint32_t new_x, new_y;
 237         Rect old_rect;
 238         memcpy(&old_rect, &(client->rect), sizeof(Rect));
 239
 240         /* Grab the pointer */
 241         /* TODO: returncode */
 242         xcb_grab_pointer(conn,
 243                         false,               /* get all pointer events specified by the following mask */
 244                         root,                /* grab the root window */
 245                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 246                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 247                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 248                         XCB_NONE,            /* confine_to = in which window should the cursor stay */
 249                         XCB_NONE,            /* don’t display a special cursor */
 250                         XCB_CURRENT_TIME);
 251
 252         /* Go into our own event loop */
 253         xcb_flush(conn);
 254
 255         xcb_generic_event_t *inside_event;
 256         /* I’ve always wanted to have my own eventhandler… */
 257         while ((inside_event = xcb_wait_for_event(conn))) {
 258                 /* Same as get_event_handler in xcb */
 259                 int nr = inside_event->response_type;
 260                 if (nr == 0) {
 261                         /* An error occured */
 262                         handle_event(NULL, conn, inside_event);
 263                         free(inside_event);
 264                         continue;
 265                 }
 266                 assert(nr < 256);
 267                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 268                 assert(nr >= 2);
 269
 270                 /* Check if we need to escape this loop */
 271                 if (nr == XCB_BUTTON_RELEASE)
 272                         break;
 273
 274                 switch (nr) {
 275                         case XCB_MOTION_NOTIFY:
 276                                 new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 277                                 new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 278
 279                                 callback(&old_rect, new_x, new_y);
 280
 281                                 break;
 282                         default:
 283                                 LOG("Passing to original handler\n");
 284                                 /* Use original handler */
 285                                 xcb_event_handle(&evenths, inside_event);
 286                                 break;
 287                 }
 288                 free(inside_event);
 289         }
 290
 291         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 292         xcb_flush(conn);
 293 }
 294
 295 /*
 296  * Changes focus in the given direction for floating clients.
 297  *
 298  * Changing to the left/right means going to the previous/next floating client,
 299  * changing to top/bottom means cycling through the Z-index.
 300  *
 301  */
 302 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 303         LOG("floating focus\n");
 304
 305         if (direction == D_LEFT || direction == D_RIGHT) {
 306                 /* Go to the next/previous floating client */
 307                 Client *client;
 308
 309                 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
 310                                                         TAILQ_NEXT(currently_focused, floating_clients))) !=
 311                        TAILQ_END(&(currently_focused->workspace->floating_clients))) {
 312                         if (!client->floating)
 313                                 continue;
 314                         set_focus(conn, client, true);
 315                         return;
 316                 }
 317         }
 318 }
 319
 320 /*
 321  * Moves the client 10px to the specified direction.
 322  *
 323  */
 324 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
 325         LOG("floating move\n");
 326
 327         switch (direction) {
 328                 case D_LEFT:
 329                         if (currently_focused->rect.x < 10)
 330                                 return;
 331                         currently_focused->rect.x -= 10;
 332                         break;
 333                 case D_RIGHT:
 334                         currently_focused->rect.x += 10;
 335                         break;
 336                 case D_UP:
 337                         if (currently_focused->rect.y < 10)
 338                                 return;
 339                         currently_focused->rect.y -= 10;
 340                         break;
 341                 case D_DOWN:
 342                         currently_focused->rect.y += 10;
 343                         break;
 344                 /* to make static analyzers happy */
 345                 default:
 346                         break;
 347         }
 348
 349         reposition_client(conn, currently_focused);
 350
 351         /* Because reposition_client does not send a faked configure event (only resize does),
 352          * we need to initiate that on our own */
 353         fake_absolute_configure_notify(conn, currently_focused);
 354         /* fake_absolute_configure_notify flushes */
 355 }
 356
 357 /*
 358  * Hides all floating clients (or show them if they are currently hidden) on
 359  * the specified workspace.
 360  *
 361  */
 362 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
 363         Client *client;
 364
 365         workspace->floating_hidden = !workspace->floating_hidden;
 366         LOG("floating_hidden is now: %d\n", workspace->floating_hidden);
 367         TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
 368                 if (workspace->floating_hidden)
 369                         xcb_unmap_window(conn, client->frame);
 370                 else xcb_map_window(conn, client->frame);
 371         }
 372
 373         /* If we just unmapped all floating windows we should ensure that the focus
 374          * is set correctly, that ist, to the first non-floating client in stack */
 375         if (workspace->floating_hidden)
 376                 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients)
 377                         if (client->floating <= FLOATING_USER_OFF) {
 378                                 set_focus(conn, client, true);
 379                                 return;
 380                         }
 381
 382         xcb_flush(conn);
 383 }