openbox/screen.c

   1 #include "openbox.h"
   2 #include "prop.h"
   3 #include "screen.h"
   4 #include "client.h"
   5 #include "frame.h"
   6 #include "engine.h"
   7 #include "focus.h"
   8 #include "dispatch.h"
   9 #include "../render/render.h"
  10
  11 #include <X11/Xlib.h>
  12 #ifdef HAVE_UNISTD_H
  13 #  include <sys/types.h>
  14 #  include <unistd.h>
  15 #endif
  16
  17 /*! The event mask to grab on the root window */
  18 #define ROOT_EVENTMASK (/*ColormapChangeMask |*/ PropertyChangeMask | \
  19                         EnterWindowMask | LeaveWindowMask | \
  20                         SubstructureNotifyMask | SubstructureRedirectMask | \
  21                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  22
  23 guint    screen_num_desktops    = 0;
  24 guint    screen_desktop         = 0;
  25 Size     screen_physical_size;
  26 gboolean screen_showing_desktop;
  27 DesktopLayout screen_desktop_layout;
  28 GPtrArray *screen_desktop_names;
  29
  30 static Rect  *area = NULL;
  31 static Strut *strut = NULL;
  32 static Window support_window = None;
  33
  34 static void screen_update_area();
  35
  36 static gboolean running;
  37 static int another_running(Display *d, XErrorEvent *e)
  38 {
  39     (void)d;(void)e;
  40     g_message("A window manager is already running on screen %d",
  41               ob_screen);
  42     running = TRUE;
  43     return -1;
  44 }
  45
  46 gboolean screen_annex()
  47 {
  48     XErrorHandler old;
  49     pid_t pid;
  50     int i, num_support;
  51     Atom *supported;
  52
  53     running = FALSE;
  54     old = XSetErrorHandler(another_running);
  55     XSelectInput(ob_display, ob_root, ROOT_EVENTMASK);
  56     XSync(ob_display, FALSE);
  57     XSetErrorHandler(old);
  58     if (running)
  59         return FALSE;
  60
  61     g_message("Managing screen %d", ob_screen);
  62
  63     /* set the mouse cursor for the root window (the default cursor) */
  64     XDefineCursor(ob_display, ob_root, ob_cursors.left_ptr);
  65
  66     /* set the OPENBOX_PID hint */
  67     pid = getpid();
  68     PROP_SET32(ob_root, openbox_pid, cardinal, pid);
  69
  70     /* create the netwm support window */
  71     support_window = XCreateSimpleWindow(ob_display, ob_root, 0,0,1,1,0,0,0);
  72
  73     /* set supporting window */
  74     PROP_SET32(ob_root, net_supporting_wm_check, window, support_window);
  75
  76     /* set properties on the supporting window */
  77     PROP_SETS(support_window, net_wm_name, utf8, "Openbox");
  78     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
  79
  80     /* set the _NET_SUPPORTED_ATOMS hint */
  81     num_support = 48;
  82     i = 0;
  83     supported = g_new(Atom, num_support);
  84     supported[i++] = prop_atoms.net_current_desktop;
  85     supported[i++] = prop_atoms.net_number_of_desktops;
  86     supported[i++] = prop_atoms.net_desktop_geometry;
  87     supported[i++] = prop_atoms.net_desktop_viewport;
  88     supported[i++] = prop_atoms.net_active_window;
  89     supported[i++] = prop_atoms.net_workarea;
  90     supported[i++] = prop_atoms.net_client_list;
  91     supported[i++] = prop_atoms.net_client_list_stacking;
  92     supported[i++] = prop_atoms.net_desktop_names;
  93     supported[i++] = prop_atoms.net_close_window;
  94     supported[i++] = prop_atoms.net_desktop_layout;
  95     supported[i++] = prop_atoms.net_showing_desktop;
  96     supported[i++] = prop_atoms.net_wm_name;
  97     supported[i++] = prop_atoms.net_wm_visible_name;
  98     supported[i++] = prop_atoms.net_wm_icon_name;
  99     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 100     supported[i++] = prop_atoms.net_wm_desktop;
 101     supported[i++] = prop_atoms.net_wm_strut;
 102     supported[i++] = prop_atoms.net_wm_window_type;
 103     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 104     supported[i++] = prop_atoms.net_wm_window_type_dock;
 105     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 106     supported[i++] = prop_atoms.net_wm_window_type_menu;
 107     supported[i++] = prop_atoms.net_wm_window_type_utility;
 108     supported[i++] = prop_atoms.net_wm_window_type_splash;
 109     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 110     supported[i++] = prop_atoms.net_wm_window_type_normal;
 111     supported[i++] = prop_atoms.net_wm_allowed_actions;
 112     supported[i++] = prop_atoms.net_wm_action_move;
 113     supported[i++] = prop_atoms.net_wm_action_resize;
 114     supported[i++] = prop_atoms.net_wm_action_minimize;
 115     supported[i++] = prop_atoms.net_wm_action_shade;
 116     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 117     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 118     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 119     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 120     supported[i++] = prop_atoms.net_wm_action_close;
 121     supported[i++] = prop_atoms.net_wm_state;
 122     supported[i++] = prop_atoms.net_wm_state_modal;
 123     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 124     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 125     supported[i++] = prop_atoms.net_wm_state_shaded;
 126     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 127     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 128     supported[i++] = prop_atoms.net_wm_state_hidden;
 129     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 130     supported[i++] = prop_atoms.net_wm_state_above;
 131     supported[i++] = prop_atoms.net_wm_state_below;
 132     g_assert(i == num_support);
 133 /*
 134   supported[] = prop_atoms.net_wm_moveresize;
 135   supported[] = prop_atoms.net_wm_moveresize_size_topleft;
 136   supported[] = prop_atoms.net_wm_moveresize_size_topright;
 137   supported[] = prop_atoms.net_wm_moveresize_size_bottomleft;
 138   supported[] = prop_atoms.net_wm_moveresize_size_bottomright;
 139   supported[] = prop_atoms.net_wm_moveresize_move;
 140   supported[] = prop_atoms.net_wm_action_stick;
 141 */
 142
 143     PROP_SET32A(ob_root, net_supported, atom, supported, num_support);
 144     g_free(supported);
 145
 146     return TRUE;
 147 }
 148
 149 void screen_startup()
 150 {
 151     screen_desktop_names = g_ptr_array_new();
 152
 153     /* get the initial size */
 154     screen_resize();
 155
 156     screen_num_desktops = 0;
 157     screen_set_num_desktops(4);
 158     screen_desktop = 0;
 159     screen_set_desktop(0);
 160
 161     /* don't start in showing-desktop mode */
 162     screen_showing_desktop = FALSE;
 163     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
 164
 165     screen_update_layout();
 166 }
 167
 168 void screen_shutdown()
 169 {
 170     guint i;
 171
 172     XSelectInput(ob_display, ob_root, NoEventMask);
 173
 174     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
 175     PROP_ERASE(ob_root, net_supported); /* not without us */
 176     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
 177
 178     XDestroyWindow(ob_display, support_window);
 179
 180     for (i = 0; i < screen_desktop_names->len; ++i)
 181         g_free(g_ptr_array_index(screen_desktop_names, i));
 182     g_ptr_array_free(screen_desktop_names, TRUE);
 183     g_free(strut);
 184     g_free(area);
 185 }
 186
 187 void screen_resize()
 188 {
 189     /* XXX RandR support here? */
 190     int geometry[2];
 191
 192     /* Set the _NET_DESKTOP_GEOMETRY hint */
 193     geometry[0] = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 194     geometry[1] = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 195     PROP_SET32A(ob_root, net_desktop_geometry, cardinal, geometry, 2);
 196     screen_physical_size.width = geometry[0];
 197     screen_physical_size.height = geometry[1];
 198
 199     if (ob_state == State_Starting)
 200         return;
 201
 202     screen_update_struts();
 203
 204     /* XXX adjust more stuff ? */
 205 }
 206
 207 void screen_set_num_desktops(guint num)
 208 {
 209     guint i, old;
 210     gulong *viewport;
 211     GSList *it;
 212
 213     g_assert(num > 0);
 214
 215     old = screen_num_desktops;
 216     screen_num_desktops = num;
 217     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
 218
 219     /* set the viewport hint */
 220     viewport = g_new0(gulong, num * 2);
 221     PROP_SET32A(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
 222     g_free(viewport);
 223
 224     /* change our struts/area to match */
 225     screen_update_struts();
 226
 227     /* the number of rows/columns will differ */
 228     screen_update_layout();
 229
 230     /* may be some unnamed desktops that we need to fill in with names */
 231     screen_update_desktop_names();
 232
 233     /* update the focus lists */
 234     /* free our lists for the desktops which have disappeared */
 235     for (i = num; i < old; ++i)
 236         g_list_free(focus_order[i]);
 237     /* realloc the array */
 238     focus_order = g_renew(GList*, focus_order, num);
 239     /* set the new lists to be empty */
 240     for (i = old; i < num; ++i)
 241         focus_order[i] = NULL;
 242
 243     /* move windows on desktops that will no longer exist! */
 244     for (it = client_list; it != NULL; it = it->next) {
 245         Client *c = it->data;
 246         if (c->desktop >= num)
 247             client_set_desktop(c, num - 1);
 248     }
 249
 250     dispatch_ob(Event_Ob_NumDesktops, num, old);
 251
 252     /* change our desktop if we're on one that no longer exists! */
 253     if (screen_desktop >= screen_num_desktops)
 254         screen_set_desktop(num - 1);
 255 }
 256
 257 void screen_set_desktop(guint num)
 258 {
 259     GList *it;
 260     guint old;
 261
 262     g_assert(num < screen_num_desktops);
 263
 264     old = screen_desktop;
 265     screen_desktop = num;
 266     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
 267
 268     if (old == num) return;
 269
 270     /* show windows before hiding the rest to lessen the enter/leave events */
 271
 272     /* show windows from top to bottom */
 273     for (it = stacking_list; it != NULL; it = it->next) {
 274         Client *c = it->data;
 275         if (!c->frame->visible && client_should_show(c))
 276             engine_frame_show(c->frame);
 277     }
 278
 279     /* hide windows from bottom to top */
 280     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 281         Client *c = it->data;
 282         if (c->frame->visible && !client_should_show(c))
 283             engine_frame_hide(c->frame);
 284     }
 285
 286     dispatch_ob(Event_Ob_Desktop, num, old);
 287 }
 288
 289 void screen_update_layout()
 290 {
 291     unsigned long *data = NULL;
 292
 293     /* defaults */
 294     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
 295     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
 296     screen_desktop_layout.rows = 1;
 297     screen_desktop_layout.columns = screen_num_desktops;
 298
 299     if (PROP_GET32A(ob_root, net_desktop_layout, cardinal, data, 4)) {
 300         if (data[0] == prop_atoms.net_wm_orientation_vert)
 301             screen_desktop_layout.orientation = data[0];
 302         if (data[3] == prop_atoms.net_wm_topright)
 303             screen_desktop_layout.start_corner = data[3];
 304         else if (data[3] == prop_atoms.net_wm_bottomright)
 305             screen_desktop_layout.start_corner = data[3];
 306         else if (data[3] == prop_atoms.net_wm_bottomleft)
 307             screen_desktop_layout.start_corner = data[3];
 308
 309         /* fill in a zero rows/columns */
 310         if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
 311             if (data[1] == 0) {
 312                 data[1] = (screen_num_desktops +
 313                            screen_num_desktops % data[2]) / data[2];
 314             } else if (data[2] == 0) {
 315                 data[2] = (screen_num_desktops +
 316                            screen_num_desktops % data[1]) / data[1];
 317             }
 318             screen_desktop_layout.columns = data[1];
 319             screen_desktop_layout.rows = data[2];
 320         }
 321
 322         /* bounds checking */
 323         if (screen_desktop_layout.orientation ==
 324             prop_atoms.net_wm_orientation_horz) {
 325             if (screen_desktop_layout.rows > screen_num_desktops)
 326                 screen_desktop_layout.rows = screen_num_desktops;
 327             if (screen_desktop_layout.columns > ((screen_num_desktops +
 328                                                   screen_num_desktops %
 329                                                   screen_desktop_layout.rows) /
 330                                                  screen_desktop_layout.rows))
 331                 screen_desktop_layout.columns =
 332                     (screen_num_desktops + screen_num_desktops %
 333                      screen_desktop_layout.rows) /
 334                     screen_desktop_layout.rows;
 335         } else {
 336             if (screen_desktop_layout.columns > screen_num_desktops)
 337                 screen_desktop_layout.columns = screen_num_desktops;
 338             if (screen_desktop_layout.rows > ((screen_num_desktops +
 339                                                screen_num_desktops %
 340                                                screen_desktop_layout.columns) /
 341                                               screen_desktop_layout.columns))
 342                 screen_desktop_layout.rows =
 343                     (screen_num_desktops + screen_num_desktops %
 344                      screen_desktop_layout.columns) /
 345                     screen_desktop_layout.columns;
 346         }
 347         g_free(data);
 348     }
 349 }
 350
 351 void screen_update_desktop_names()
 352 {
 353     guint i;
 354
 355     /* empty the array */
 356     for (i = 0; i < screen_desktop_names->len; ++i)
 357         g_free(g_ptr_array_index(screen_desktop_names, i));
 358     g_ptr_array_set_size(screen_desktop_names, 0);
 359
 360     PROP_GETSA(ob_root, net_desktop_names, utf8, screen_desktop_names);
 361
 362     while (screen_desktop_names->len < screen_num_desktops)
 363         g_ptr_array_add(screen_desktop_names, g_strdup("Unnamed Desktop"));
 364 }
 365
 366 void screen_show_desktop(gboolean show)
 367 {
 368     GList *it;
 369
 370     if (show == screen_showing_desktop) return; /* no change */
 371
 372     screen_showing_desktop = show;
 373
 374     if (show) {
 375         /* bottom to top */
 376         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 377             Client *client = it->data;
 378             if (client->frame->visible && !client_should_show(client))
 379                 engine_frame_hide(client->frame);
 380         }
 381     } else {
 382         /* top to bottom */
 383         for (it = stacking_list; it != NULL; it = it->next) {
 384             Client *client = it->data;
 385             if (!client->frame->visible && client_should_show(client))
 386                 engine_frame_show(client->frame);
 387         }
 388     }
 389
 390     show = !!show; /* make it boolean */
 391     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
 392
 393     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 394 }
 395
 396 void screen_install_colormap(Client *client, gboolean install)
 397 {
 398     XWindowAttributes wa;
 399
 400     if (client == NULL) {
 401         if (install)
 402             XInstallColormap(ob_display, render_colormap);
 403         else
 404             XUninstallColormap(ob_display, render_colormap);
 405     } else {
 406         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 407             wa.colormap != None) {
 408             if (install)
 409                 XInstallColormap(ob_display, wa.colormap);
 410             else
 411                 XUninstallColormap(ob_display, wa.colormap);
 412         }
 413     }
 414 }
 415
 416 void screen_update_struts()
 417 {
 418     GSList *it;
 419     guint i;
 420
 421     g_free(strut);
 422     strut = g_new0(Strut, screen_num_desktops + 1);
 423
 424     for (it = client_list; it != NULL; it = it->next) {
 425         Client *c = it->data;
 426         if (c->iconic) continue; /* these dont count in the strut */
 427
 428         if (c->desktop == 0xffffffff) {
 429             for (i = 0; i < screen_num_desktops; ++i)
 430                 STRUT_ADD(strut[i], c->strut);
 431         } else {
 432             g_assert(c->desktop < screen_num_desktops);
 433             STRUT_ADD(strut[c->desktop], c->strut);
 434         }
 435         /* apply to the 'all desktops' strut */
 436         STRUT_ADD(strut[screen_num_desktops], c->strut);
 437     }
 438     screen_update_area();
 439 }
 440
 441 static void screen_update_area()
 442 {
 443     guint i;
 444     gulong *dims;
 445
 446     g_free(area);
 447     area = g_new0(Rect, screen_num_desktops + 1);
 448
 449     dims = g_new(unsigned long, 4 * screen_num_desktops);
 450     for (i = 0; i < screen_num_desktops + 1; ++i) {
 451         Rect old_area = area[i];
 452 /*
 453   #ifdef    XINERAMA
 454   // reset to the full areas
 455   if (isXineramaActive())
 456   xineramaUsableArea = getXineramaAreas();
 457   #endif // XINERAMA
 458 */
 459
 460         RECT_SET(area[i], strut[i].left, strut[i].top,
 461                  screen_physical_size.width - (strut[i].left +
 462                                                strut[i].right),
 463                  screen_physical_size.height - (strut[i].top +
 464                                                 strut[i].bottom));
 465
 466 /*
 467   #ifdef    XINERAMA
 468   if (isXineramaActive()) {
 469   // keep each of the ximerama-defined areas inside the strut
 470   RectList::iterator xit, xend = xineramaUsableArea.end();
 471   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
 472   if (xit->x() < usableArea.x()) {
 473   xit->setX(usableArea.x());
 474   xit->setWidth(xit->width() - usableArea.x());
 475   }
 476   if (xit->y() < usableArea.y()) {
 477   xit->setY(usableArea.y());
 478   xit->setHeight(xit->height() - usableArea.y());
 479   }
 480   if (xit->x() + xit->width() > usableArea.width())
 481   xit->setWidth(usableArea.width() - xit->x());
 482   if (xit->y() + xit->height() > usableArea.height())
 483   xit->setHeight(usableArea.height() - xit->y());
 484   }
 485   }
 486   #endif // XINERAMA
 487 */
 488         if (!RECT_EQUAL(old_area, area[i])) {
 489             /* the area has changed, adjust all the maximized windows */
 490             GSList *it;
 491             for (it = client_list; it; it = it->next) {
 492                 Client *c = it->data;
 493                 if (i < screen_num_desktops) {
 494                     if (c->desktop == i)
 495                         client_remaximize(c);
 496                 } else {
 497                     /* the 'all desktops' size */
 498                     if (c->desktop == DESKTOP_ALL)
 499                         client_remaximize(c);
 500                 }
 501             }
 502         }
 503
 504         /* don't set these for the 'all desktops' area */
 505         if (i < screen_num_desktops) {
 506             dims[(i * 4) + 0] = area[i].x;
 507             dims[(i * 4) + 1] = area[i].y;
 508             dims[(i * 4) + 2] = area[i].width;
 509             dims[(i * 4) + 3] = area[i].height;
 510         }
 511     }
 512     PROP_SET32A(ob_root, net_workarea, cardinal,
 513                 dims, 4 * screen_num_desktops);
 514     g_free(dims);
 515 }
 516
 517 Rect *screen_area(guint desktop)
 518 {
 519     if (desktop >= screen_num_desktops) {
 520         if (desktop == DESKTOP_ALL)
 521             return &area[screen_num_desktops];
 522         return NULL;
 523     }
 524     return &area[desktop];
 525 }
 526
 527 Strut *screen_strut(guint desktop)
 528 {
 529     if (desktop >= screen_num_desktops) {
 530         if (desktop == DESKTOP_ALL)
 531             return &strut[screen_num_desktops];
 532         return NULL;
 533     }
 534     return &strut[desktop];
 535 }