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 "data.h"
  22 #include "util.h"
  23 #include "xcb.h"
  24 #include "debug.h"
  25 #include "layout.h"
  26 #include "client.h"
  27
  28 /* On which border was the dragging initiated? */
  29 typedef enum { BORDER_LEFT, BORDER_RIGHT, BORDER_TOP, BORDER_BOTTOM} border_t;
  30 /* Callback for dragging */
  31 typedef void(*callback_t)(xcb_connection_t*, Client*, border_t, Rect*, xcb_button_press_event_t*, uint32_t, uint32_t);
  32
  33 /* Forward definitions */
  34 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
  35                          border_t border, callback_t callback);
  36
  37 /*
  38  * Toggles floating mode for the given client.
  39  * Correctly takes care of the position/size (separately stored for tiling/floating mode)
  40  * and repositions/resizes/redecorates the client.
  41  *
  42  */
  43 void toggle_floating_mode(xcb_connection_t *conn, Client *client) {
  44         Container *con = client->container;
  45
  46         if (con == NULL) {
  47                 LOG("This client is already in floating (container == NULL), re-inserting\n");
  48                 Client *next_tiling;
  49                 SLIST_FOREACH(next_tiling, &(client->workspace->focus_stack), focus_clients)
  50                         if (!next_tiling->floating)
  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 == SLIST_END(&(client->workspace->focus_stack)))
  55                         con = client->workspace->table[0][0];
  56                 else con = next_tiling->container;
  57
  58                 LOG("destination container = %p\n", con);
  59                 Client *old_focused = con->currently_focused;
  60                 /* Preserve position/size */
  61                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  62
  63                 client->floating = false;
  64                 client->container = con;
  65
  66                 if (old_focused != NULL && !old_focused->dock)
  67                         CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
  68                 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
  69
  70                 LOG("Re-inserted the client into the matrix.\n");
  71                 con->currently_focused = client;
  72
  73                 render_container(conn, con);
  74                 xcb_flush(conn);
  75
  76                 return;
  77         }
  78
  79         LOG("Entering floating for client %08x\n", client->child);
  80
  81         /* Remove the client of its container */
  82         client_remove_from_container(conn, client, con, false);
  83         client->container = NULL;
  84
  85         if (con->currently_focused == client) {
  86                 LOG("Need to re-adjust currently_focused\n");
  87                 /* Get the next client in the focus stack for this particular container */
  88                 con->currently_focused = get_last_focused_client(conn, con, NULL);
  89         }
  90
  91         client->floating = true;
  92
  93         /* Initialize the floating position from the position in tiling mode, if this
  94          * client never was floating (width == 0) */
  95         if (client->floating_rect.width == 0) {
  96                 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
  97                 LOG("(%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
  98                                 client->floating_rect.width, client->floating_rect.height);
  99         } else {
 100                 /* If the client was already in floating before we restore the old position / size */
 101                 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
 102         }
 103
 104         /* Raise the client */
 105         xcb_raise_window(conn, client->frame);
 106         reposition_client(conn, client);
 107         resize_client(conn, client);
 108         /* redecorate_window flushes */
 109         redecorate_window(conn, client);
 110
 111         /* Re-render the tiling layout of this container */
 112         render_container(conn, con);
 113         xcb_flush(conn);
 114 }
 115
 116 /*
 117  * Callback for resizing windows
 118  *
 119  */
 120 static void resize_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 121                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 122         switch (border) {
 123                 case BORDER_RIGHT:
 124                         client->rect.width = old_rect->width + (new_x - event->root_x);
 125                         break;
 126
 127                 case BORDER_BOTTOM:
 128                         client->rect.height = old_rect->height + (new_y - event->root_y);
 129                         break;
 130
 131                 case BORDER_TOP:
 132                         client->rect.y = old_rect->y + (new_y - event->root_y);
 133                         client->rect.height = old_rect->height + (event->root_y - new_y);
 134                         break;
 135
 136                 case BORDER_LEFT:
 137                         client->rect.x = old_rect->x + (new_x - event->root_x);
 138                         client->rect.width = old_rect->width + (event->root_x - new_x);
 139                         break;
 140         }
 141
 142         /* Push the new position/size to X11 */
 143         reposition_client(conn, client);
 144         resize_client(conn, client);
 145         xcb_flush(conn);
 146 }
 147
 148 /*
 149  * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
 150  * Determines on which border the user clicked and launches the drag_pointer function
 151  * with the resize_callback.
 152  *
 153  */
 154 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 155
 156         LOG("floating border click\n");
 157
 158         border_t border;
 159         if (event->event_y < 2)
 160                 border = BORDER_TOP;
 161         else if (event->event_y >= (client->rect.height - 2))
 162                 border = BORDER_BOTTOM;
 163         else if (event->event_x <= 2)
 164                 border = BORDER_LEFT;
 165         else if (event->event_x > 2)
 166                 border = BORDER_RIGHT;
 167         else {
 168                 LOG("Not on any border, not doing anything.\n");
 169                 return 1;
 170         }
 171
 172         LOG("border = %d\n", border);
 173
 174         drag_pointer(conn, client, event, border, resize_callback);
 175
 176         return 1;
 177 }
 178
 179 static void drag_window_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
 180                             xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
 181         /* Reposition the client correctly while moving */
 182         client->rect.x = old_rect->x + (new_x - event->root_x);
 183         client->rect.y = old_rect->y + (new_y - event->root_y);
 184         reposition_client(conn, client);
 185         /* Because reposition_client does not send a faked configure event (only resize does),
 186          * we need to initiate that on our own */
 187         fake_absolute_configure_notify(conn, client);
 188         /* fake_absolute_configure_notify flushes */
 189 }
 190
 191 /*
 192  * Called when the user clicked on the titlebar of a floating window.
 193  * Calls the drag_pointer function with the drag_window callback
 194  *
 195  */
 196 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
 197         LOG("floating_drag_window\n");
 198
 199         drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
 200 }
 201
 202 /*
 203  * This function grabs your pointer and lets you drag stuff around (borders).
 204  * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
 205  * and the given callback will be called with the parameters specified (client,
 206  * border on which the click originally was), the original rect of the client,
 207  * the event and the new coordinates (x, y).
 208  *
 209  */
 210 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
 211                          border_t border, callback_t callback) {
 212         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 213         uint32_t new_x, new_y;
 214         Rect old_rect;
 215         memcpy(&old_rect, &(client->rect), sizeof(Rect));
 216
 217         /* Grab the pointer */
 218         /* TODO: returncode */
 219         xcb_grab_pointer(conn,
 220                         false,               /* get all pointer events specified by the following mask */
 221                         root,                /* grab the root window */
 222                         XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
 223                         XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
 224                         XCB_GRAB_MODE_ASYNC, /* keyboard mode */
 225                         XCB_NONE,            /* confine_to = in which window should the cursor stay */
 226                         XCB_NONE,            /* don’t display a special cursor */
 227                         XCB_CURRENT_TIME);
 228
 229         /* Go into our own event loop */
 230         xcb_flush(conn);
 231
 232         xcb_generic_event_t *inside_event;
 233         /* I’ve always wanted to have my own eventhandler… */
 234         while ((inside_event = xcb_wait_for_event(conn))) {
 235                 /* Same as get_event_handler in xcb */
 236                 int nr = inside_event->response_type;
 237                 if (nr == 0) {
 238                         /* An error occured */
 239                         handle_event(NULL, conn, inside_event);
 240                         free(inside_event);
 241                         continue;
 242                 }
 243                 assert(nr < 256);
 244                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 245                 assert(nr >= 2);
 246
 247                 /* Check if we need to escape this loop */
 248                 if (nr == XCB_BUTTON_RELEASE)
 249                         break;
 250
 251                 switch (nr) {
 252                         case XCB_MOTION_NOTIFY:
 253                                 new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 254                                 new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 255
 256                                 callback(conn, client, border, &old_rect, event, new_x, new_y);
 257
 258                                 break;
 259                         default:
 260                                 LOG("Passing to original handler\n");
 261                                 /* Use original handler */
 262                                 xcb_event_handle(&evenths, inside_event);
 263                                 break;
 264                 }
 265                 free(inside_event);
 266         }
 267
 268         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 269         xcb_flush(conn);
 270 }
 271