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)(xcb_connection_t*, Client*, border_t, Rect*, xcb_button_press_event_t*, 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 == SLIST_END(&(client->workspace->focus_stack)))
  60                         con = client->workspace->table[0][0];
  61                 else con = next_tiling->container;
  62
  63                 LOG("destination container = %p\n", con);
  64                 Client *old_focused = con->currently_focused;
  65                 /* Preserve position/size */
  66                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  67
  68                 client->floating = FLOATING_USER_OFF;
  69                 client->container = con;
  70
  71                 if (old_focused != NULL && !old_focused->dock)
  72                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
  73                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
  74
  75                 LOG("Re-inserted the client into the matrix.\n");
  76                 con->currently_focused = client;
  77
  78                 render_container(conn, con);
  79                 xcb_flush(conn);
  80
  81                 return;
  82         }
  83
  84         LOG("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         if (con->currently_focused == client) {
  91                 LOG("Need to re-adjust currently_focused\n");
  92                 /* Get the next client in the focus stack for this particular container */
  93                 con->currently_focused = get_last_focused_client(conn, con, NULL);
  94         }
  95
  96         if (automatic)
  97                 client->floating = FLOATING_AUTO_ON;
  98         else client->floating = FLOATING_USER_ON;
  99
 100         /* Initialize the floating position from the position in tiling mode, if this
 101          * client never was floating (x == -1) */
 102         if (client->floating_rect.x == -1) {
 103                 /* Copy over the position */
 104                 client->floating_rect.x = client->rect.x;
 105                 client->floating_rect.y = client->rect.y;
 106
 107                 /* Copy the size the other direction */
 108                 client->child_rect.width = client->floating_rect.width;
 109                 client->child_rect.height = client->floating_rect.height;
 110
 111                 client->rect.width = client->child_rect.width + 2 + 2;
 112                 client->rect.height = client->child_rect.height + (font->height + 2 + 2) + 2;
 113
 114                 LOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 115                                 client->floating_rect.width, client->floating_rect.height);
 116         } else {
 117                 /* If the client was already in floating before we restore the old position / size */
 118                 LOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
 119                         client->floating_rect.width, client->floating_rect.height);
 120                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 121         }
 122
 123         /* Raise the client */
 124         xcb_raise_window(conn, client->frame);
 125         reposition_client(conn, client);
 126         resize_client(conn, client);
 127         /* redecorate_window flushes */
 128         redecorate_window(conn, client);
 129
 130         /* Re-render the tiling layout of this container */
 131         render_container(conn, con);
 132         xcb_flush(conn);
 133 }
 134
 135 /*
 136  * Callback for resizing windows
 137  *
 138  */
 139 static void resize_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 140                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 141         switch (border) {
 142                 case BORDER_RIGHT:
 143                         client->rect.width = old_rect->width + (new_x - event->root_x);
 144                         break;
 145
 146                 case BORDER_BOTTOM:
 147                         client->rect.height = old_rect->height + (new_y - event->root_y);
 148                         break;
 149
 150                 case BORDER_TOP:
 151                         client->rect.y = old_rect->y + (new_y - event->root_y);
 152                         client->rect.height = old_rect->height + (event->root_y - new_y);
 153                         break;
 154
 155                 case BORDER_LEFT:
 156                         client->rect.x = old_rect->x + (new_x - event->root_x);
 157                         client->rect.width = old_rect->width + (event->root_x - new_x);
 158                         break;
 159         }
 160
 161         /* Push the new position/size to X11 */
 162         reposition_client(conn, client);
 163         resize_client(conn, client);
 164         xcb_flush(conn);
 165 }
 166
 167 /*
 168  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 169  * Determines on which border the user clicked and launches the drag_pointer function
 170  * with the resize_callback.
 171  *
 172  */
 173 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 174
 175         LOG("floating border click\n");
 176
 177         border_t border;
 178         if (event->event_y < 2)
 179                 border = BORDER_TOP;
 180         else if (event->event_y >= (client->rect.height - 2))
 181                 border = BORDER_BOTTOM;
 182         else if (event->event_x <= 2)
 183                 border = BORDER_LEFT;
 184         else if (event->event_x > 2)
 185                 border = BORDER_RIGHT;
 186         else {
 187                 LOG("Not on any border, not doing anything.\n");
 188                 return 1;
 189         }
 190
 191         LOG("border = %d\n", border);
 192
 193         drag_pointer(conn, client, event, border, resize_callback);
 194
 195         return 1;
 196 }
 197
 198 static void drag_window_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 199                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 200         /* Reposition the client correctly while moving */
 201         client->rect.x = old_rect->x + (new_x - event->root_x);
 202         client->rect.y = old_rect->y + (new_y - event->root_y);
 203         reposition_client(conn, client);
 204         /* Because reposition_client does not send a faked configure event (only resize does),
 205          * we need to initiate that on our own */
 206         fake_absolute_configure_notify(conn, client);
 207         /* fake_absolute_configure_notify flushes */
 208 }
 209
 210 /*
 211  * Called when the user clicked on the titlebar of a floating window.
 212  * Calls the drag_pointer function with the drag_window callback
 213  *
 214  */
 215 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 216         LOG("floating_drag_window\n");
 217
 218         drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
 219 }
 220
 221 /*
 222  * This function grabs your pointer and lets you drag stuff around (borders).
 223  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 224  * and the given callback will be called with the parameters specified (client,
 225  * border on which the click originally was), the original rect of the client,
 226  * the event and the new coordinates (x, y).
 227  *
 228  */
 229 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 230                          border_t border, callback_t callback) {
 231         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 232         uint32_t new_x, new_y;
 233         Rect old_rect;
 234         memcpy(&old_rect, &(client->rect), sizeof(Rect));
 235
 236         /* Grab the pointer */
 237         /* TODO: returncode */
 238         xcb_grab_pointer(conn,
 239                         false,               /* get all pointer events specified by the following mask */
 240                         root,                /* grab the root window */
 241                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 242                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 243                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 244                         XCB_NONE,            /* confine_to = in which window should the cursor stay */
 245                         XCB_NONE,            /* don’t display a special cursor */
 246                         XCB_CURRENT_TIME);
 247
 248         /* Go into our own event loop */
 249         xcb_flush(conn);
 250
 251         xcb_generic_event_t *inside_event;
 252         /* I’ve always wanted to have my own eventhandler… */
 253         while ((inside_event = xcb_wait_for_event(conn))) {
 254                 /* Same as get_event_handler in xcb */
 255                 int nr = inside_event->response_type;
 256                 if (nr == 0) {
 257                         /* An error occured */
 258                         handle_event(NULL, conn, inside_event);
 259                         free(inside_event);
 260                         continue;
 261                 }
 262                 assert(nr < 256);
 263                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 264                 assert(nr >= 2);
 265
 266                 /* Check if we need to escape this loop */
 267                 if (nr == XCB_BUTTON_RELEASE)
 268                         break;
 269
 270                 switch (nr) {
 271                         case XCB_MOTION_NOTIFY:
 272                                 new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 273                                 new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 274
 275                                 callback(conn, client, border, &old_rect, event, new_x, new_y);
 276
 277                                 break;
 278                         default:
 279                                 LOG("Passing to original handler\n");
 280                                 /* Use original handler */
 281                                 xcb_event_handle(&evenths, inside_event);
 282                                 break;
 283                 }
 284                 free(inside_event);
 285         }
 286
 287         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 288         xcb_flush(conn);
 289 }
 290