git.sur5r.net Git - i3/i3/blob - src/handlers.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  */
  11 #include <stdio.h>
  12 #include <assert.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <xcb/xcb.h>
  16
  17 #include <xcb/xcb_wm.h>
  18 #include <X11/XKBlib.h>
  19
  20 #include "i3.h"
  21 #include "debug.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "commands.h"
  25 #include "data.h"
  26 #include "font.h"
  27 #include "xcb.h"
  28 #include "util.h"
  29 #include "xinerama.h"
  30
  31 /*
  32  * Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
  33  * Therefore, we just replay all key presses.
  34  *
  35  */
  36 int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
  37         printf("got key release, just passing\n");
  38         xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
  39         xcb_flush(conn);
  40         return 1;
  41 }
  42
  43 /*
  44  * There was a key press. We compare this key code with our bindings table and pass
  45  * the bound action to parse_command().
  46  *
  47  */
  48 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
  49         printf("Keypress %d\n", event->detail);
  50
  51         /* We need to get the keysym group (There are group 1 to group 4, each holding
  52            two keysyms (without shift and with shift) using Xkb because X fails to
  53            provide them reliably (it works in Xephyr, it does not in real X) */
  54         XkbStateRec state;
  55         if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
  56                 event->state |= 0x2;
  57
  58         printf("state %d\n", event->state);
  59
  60         /* Remove the numlock bit, all other bits are modifiers we can bind to */
  61         uint16_t state_filtered = event->state & ~XCB_MOD_MASK_LOCK;
  62
  63         /* Find the binding */
  64         Binding *bind;
  65         TAILQ_FOREACH(bind, &bindings, bindings)
  66                 if (bind->keycode == event->detail && bind->mods == state_filtered)
  67                         break;
  68
  69         /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
  70            the user did not press Mode_switch, so just pass it… */
  71         if (bind == TAILQ_END(&bindings)) {
  72                 xcb_allow_events(conn, ReplayKeyboard, event->time);
  73                 xcb_flush(conn);
  74                 return 1;
  75         }
  76
  77         parse_command(conn, bind->command);
  78         if (event->state & 0x2) {
  79                 printf("Mode_switch -> allow_events(SyncKeyboard)\n");
  80                 xcb_allow_events(conn, SyncKeyboard, event->time);
  81                 xcb_flush(conn);
  82         }
  83         return 1;
  84 }
  85
  86
  87 /*
  88  * When the user moves the mouse pointer onto a window, this callback gets called.
  89  *
  90  */
  91 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
  92         printf("enter_notify\n");
  93
  94         /* This was either a focus for a client’s parent (= titlebar)… */
  95         Client *client = table_get(byParent, event->event);
  96         /* …or the client itself */
  97         if (client == NULL)
  98                 client = table_get(byChild, event->event);
  99
 100         /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
 101         if (client == NULL) {
 102                 printf("Getting screen at %d x %d\n", event->root_x, event->root_y);
 103                 i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
 104                 if (screen == NULL) {
 105                         printf("ERROR: No such screen\n");
 106                         return 0;
 107                 }
 108                 c_ws = &workspaces[screen->current_workspace];
 109                 printf("We're now on virtual screen number %d\n", screen->num);
 110                 return 1;
 111         }
 112
 113         set_focus(conn, client);
 114
 115         return 1;
 116 }
 117
 118 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
 119         printf("button press!\n");
 120         /* This was either a focus for a client’s parent (= titlebar)… */
 121         Client *client = table_get(byChild, event->event);
 122         bool border_click = false;
 123         if (client == NULL) {
 124                 client = table_get(byParent, event->event);
 125                 border_click = true;
 126         }
 127         if (client == NULL)
 128                 return 1;
 129
 130         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 131         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
 132
 133         /* Set focus in any case */
 134         set_focus(conn, client);
 135
 136         /* Let’s see if this was on the borders (= resize). If not, we’re done */
 137         printf("press button on x=%d, y=%d\n", event->event_x, event->event_y);
 138
 139         Container *con = client->container,
 140                   *first = NULL,
 141                   *second = NULL;
 142         enum { O_HORIZONTAL, O_VERTICAL } orientation = O_VERTICAL;
 143
 144         printf("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
 145
 146         if (!border_click) {
 147                 printf("client. done.\n");
 148                 return 1;
 149         }
 150
 151         if (event->event_y < 2) {
 152                 /* This was a press on the top border */
 153                 if (con->row == 0)
 154                         return 1;
 155                 first = con->workspace->table[con->col][con->row-1];
 156                 second = con;
 157                 orientation = O_HORIZONTAL;
 158         } else if (event->event_y >= (client->rect.height - 2)) {
 159                 /* …bottom border */
 160                 if (con->row == (con->workspace->rows-1))
 161                         return 1;
 162                 first = con;
 163                 second = con->workspace->table[con->col][con->row+1];
 164                 orientation = O_HORIZONTAL;
 165         } else if (event->event_x < 2) {
 166                 /* …left border */
 167                 if (con->col == 0)
 168                         return 1;
 169                 first = con->workspace->table[con->col-1][con->row];
 170                 second = con;
 171         } else if (event->event_x > 2) {
 172                 /* …right border */
 173                 if (con->col == (con->workspace->cols-1))
 174                         return 1;
 175                 first = con;
 176                 second = con->workspace->table[con->col+1][con->row];
 177         }
 178
 179         /* Open a new window, the resizebar. Grab the pointer and move the window around
 180            as the user moves the pointer. */
 181         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
 182         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, 0, NULL);
 183
 184         Rect helprect;
 185         if (orientation == O_VERTICAL) {
 186                 helprect.x = event->root_x;
 187                 helprect.y = 0;
 188                 helprect.width = 2;
 189                 helprect.height = root_screen->height_in_pixels; /* this has to be the cell’s height */
 190         } else {
 191                 helprect.x = 0;
 192                 helprect.y = event->root_y;
 193                 helprect.width = root_screen->width_in_pixels; /* this has to be the cell’s width*/
 194                 helprect.height = 2;
 195         }
 196         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT, 0, NULL);
 197
 198         uint32_t values[1] = {get_colorpixel(conn, helpwin, "#4c7899")};
 199         xcb_void_cookie_t cookie = xcb_change_window_attributes_checked(conn, helpwin, XCB_CW_BACK_PIXEL, values);
 200         check_error(conn, cookie, "Could not change window attributes (background color)");
 201
 202         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 203
 204         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
 205                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
 206
 207         xcb_flush(conn);
 208
 209         xcb_generic_event_t *inside_event;
 210         /* I’ve always wanted to have my own eventhandler… */
 211         while ((inside_event = xcb_wait_for_event(conn))) {
 212                 /* Same as get_event_handler in xcb */
 213                 int nr = inside_event->response_type;
 214                 if (nr == 0) {
 215                         /* An error occured */
 216                         handle_event(NULL, conn, inside_event);
 217                         free(inside_event);
 218                         continue;
 219                 }
 220                 assert(nr < 256);
 221                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 222                 assert(nr >= 2);
 223
 224                 /* Check if we need to escape this loop… */
 225                 if (nr == XCB_BUTTON_RELEASE)
 226                         break;
 227
 228                 switch (nr) {
 229                         case XCB_MOTION_NOTIFY:
 230                                 if (orientation == O_VERTICAL) {
 231                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 232                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 233                                 } else {
 234                                         values[0] = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 235                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 236                                 }
 237
 238                                 xcb_flush(conn);
 239                                 break;
 240                         case XCB_EXPOSE:
 241                                 /* Use original handler */
 242                                 xcb_event_handle(&evenths, inside_event);
 243                                 break;
 244                         default:
 245                                 printf("Ignoring event of type %d\n", nr);
 246                                 break;
 247                 }
 248                 free(inside_event);
 249         }
 250
 251         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 252         xcb_destroy_window(conn, helpwin);
 253         xcb_destroy_window(conn, grabwin);
 254         xcb_flush(conn);
 255
 256         Workspace *ws = con->workspace;
 257         if (orientation == O_VERTICAL) {
 258                 printf("Resize was from X = %d to X = %d\n", event->root_x, values[0]);
 259
 260                 /* Convert 0 (for default width_factor) to actual numbers */
 261                 if (first->width_factor == 0)
 262                         first->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 263                 if (second->width_factor == 0)
 264                         second->width_factor = ((float)ws->rect.width / ws->cols) / ws->rect.width;
 265
 266                 first->width_factor *= (float)(first->width + (values[0] - event->root_x)) / first->width;
 267                 second->width_factor *= (float)(second->width - (values[0] - event->root_x)) / second->width;
 268         } else {
 269                 printf("Resize was from Y = %d to Y = %d\n", event->root_y, values[0]);
 270
 271                 /* Convert 0 (for default height_factor) to actual numbers */
 272                 if (first->height_factor == 0)
 273                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 274                 if (second->height_factor == 0)
 275                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 276
 277                 first->height_factor *= (float)(first->height + (values[0] - event->root_y)) / first->height;
 278                 second->height_factor *= (float)(second->height - (values[0] - event->root_y)) / second->height;
 279         }
 280
 281         render_layout(conn);
 282
 283         return 1;
 284 }
 285
 286 int handle_map_notify_event(void *prophs, xcb_connection_t *conn, xcb_map_notify_event_t *event) {
 287         window_attributes_t wa = { TAG_VALUE };
 288         wa.u.override_redirect = event->override_redirect;
 289         printf("MapNotify for 0x%08x.\n", event->window);
 290         manage_window(prophs, conn, event->window, wa);
 291         return 1;
 292 }
 293
 294 /*
 295  * Our window decorations were unmapped. That means, the window will be killed now,
 296  * so we better clean up before.
 297  *
 298  */
 299 int handle_unmap_notify_event(void *data, xcb_connection_t *c, xcb_unmap_notify_event_t *e) {
 300         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(c)).data->root;
 301
 302         Client *client = table_get(byChild, e->window);
 303         /* First, we need to check if the client is awaiting an unmap-request which
 304            was generated by us reparenting the window. In that case, we just ignore it. */
 305         if (client != NULL && client->awaiting_useless_unmap) {
 306                 printf("Dropping this unmap request, it was generated by reparenting\n");
 307                 client->awaiting_useless_unmap = false;
 308                 return 1;
 309         }
 310         client = table_remove(byChild, e->window);
 311
 312         printf("UnmapNotify for 0x%08x (received from 0x%08x): ", e->window, e->event);
 313         if(client == NULL) {
 314                 printf("not a managed window. Ignoring.\n");
 315                 return 0;
 316         }
 317
 318
 319         if (client->container->currently_focused == client)
 320                 client->container->currently_focused = NULL;
 321         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 322
 323         printf("child of 0x%08x.\n", client->frame);
 324         xcb_reparent_window(c, client->child, root, 0, 0);
 325         xcb_destroy_window(c, client->frame);
 326         xcb_flush(c);
 327         table_remove(byParent, client->frame);
 328         free(client);
 329
 330         render_layout(c);
 331
 332         return 1;
 333 }
 334
 335 /*
 336  * Called when a window changes its title
 337  *
 338  */
 339 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
 340                                 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
 341         printf("window's name changed.\n");
 342         Client *client = table_get(byChild, window);
 343         if (client == NULL)
 344                 return 1;
 345
 346         client->name_len = xcb_get_property_value_length(prop);
 347         client->name = malloc(client->name_len);
 348         strncpy(client->name, xcb_get_property_value(prop), client->name_len);
 349         printf("rename to \"%.*s\".\n", client->name_len, client->name);
 350
 351         decorate_window(conn, client);
 352         xcb_flush(conn);
 353
 354         return 1;
 355 }
 356
 357 /*
 358  * Expose event means we should redraw our windows (= title bar)
 359  *
 360  */
 361 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *e) {
 362         Client *client = table_get(byParent, e->window);
 363         if(!client || e->count != 0)
 364                 return 1;
 365         printf("handle_expose_event()\n");
 366         decorate_window(conn, client);
 367         return 1;
 368 }
 369
 370 /*
 371  * Handle client messages (EWMH)
 372  *
 373  */
 374 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
 375         printf("client_message\n");
 376
 377         if (event->type == atoms[_NET_WM_STATE]) {
 378                 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
 379                         return 0;
 380
 381                 printf("fullscreen\n");
 382
 383                 Client *client = table_get(byChild, event->window);
 384                 if (client == NULL)
 385                         return 0;
 386
 387                 /* Check if the fullscreen state should be toggled… */
 388                 if ((client->fullscreen &&
 389                      (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
 390                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
 391                     (!client->fullscreen &&
 392                      (event->data.data32[0] == _NET_WM_STATE_ADD ||
 393                       event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
 394                         toggle_fullscreen(conn, client);
 395         } else {
 396                 printf("unhandled clientmessage\n");
 397                 return 0;
 398         }
 399
 400         return 1;
 401 }
 402
 403 int window_type_handler(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
 404                         xcb_atom_t atom, xcb_get_property_reply_t *property) {
 405         /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
 406          before changing this property. */
 407         printf("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
 408         return 0;
 409 }