i3
src/manage.c
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00001 /*
00002  * vim:ts=4:sw=4:expandtab
00003  *
00004  * i3 - an improved dynamic tiling window manager
00005  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
00006  *
00007  * manage.c: Initially managing new windows (or existing ones on restart).
00008  *
00009  */
00010 #include "all.h"
00011 
00012 /*
00013  * Go through all existing windows (if the window manager is restarted) and manage them
00014  *
00015  */
00016 void manage_existing_windows(xcb_window_t root) {
00017     xcb_query_tree_reply_t *reply;
00018     int i, len;
00019     xcb_window_t *children;
00020     xcb_get_window_attributes_cookie_t *cookies;
00021 
00022     /* Get the tree of windows whose parent is the root window (= all) */
00023     if ((reply = xcb_query_tree_reply(conn, xcb_query_tree(conn, root), 0)) == NULL)
00024         return;
00025 
00026     len = xcb_query_tree_children_length(reply);
00027     cookies = smalloc(len * sizeof(*cookies));
00028 
00029     /* Request the window attributes for every window */
00030     children = xcb_query_tree_children(reply);
00031     for (i = 0; i < len; ++i)
00032         cookies[i] = xcb_get_window_attributes(conn, children[i]);
00033 
00034     /* Call manage_window with the attributes for every window */
00035     for (i = 0; i < len; ++i)
00036         manage_window(children[i], cookies[i], true);
00037 
00038     free(reply);
00039     free(cookies);
00040 }
00041 
00042 /*
00043  * Restores the geometry of each window by reparenting it to the root window
00044  * at the position of its frame.
00045  *
00046  * This is to be called *only* before exiting/restarting i3 because of evil
00047  * side-effects which are to be expected when continuing to run i3.
00048  *
00049  */
00050 void restore_geometry() {
00051     DLOG("Restoring geometry\n");
00052 
00053     Con *con;
00054     TAILQ_FOREACH(con, &all_cons, all_cons)
00055         if (con->window) {
00056             DLOG("Re-adding X11 border of %d px\n", con->border_width);
00057             con->window_rect.width += (2 * con->border_width);
00058             con->window_rect.height += (2 * con->border_width);
00059             xcb_set_window_rect(conn, con->window->id, con->window_rect);
00060             DLOG("placing window %08x at %d %d\n", con->window->id, con->rect.x, con->rect.y);
00061             xcb_reparent_window(conn, con->window->id, root,
00062                                 con->rect.x, con->rect.y);
00063         }
00064 
00065     /* Make sure our changes reach the X server, we restart/exit now */
00066     xcb_flush(conn);
00067 }
00068 
00069 /*
00070  * Do some sanity checks and then reparent the window.
00071  *
00072  */
00073 void manage_window(xcb_window_t window, xcb_get_window_attributes_cookie_t cookie,
00074                    bool needs_to_be_mapped) {
00075     xcb_drawable_t d = { window };
00076     xcb_get_geometry_cookie_t geomc;
00077     xcb_get_geometry_reply_t *geom;
00078     xcb_get_window_attributes_reply_t *attr = NULL;
00079 
00080     xcb_get_property_cookie_t wm_type_cookie, strut_cookie, state_cookie,
00081                               utf8_title_cookie, title_cookie,
00082                               class_cookie, leader_cookie, transient_cookie,
00083                               role_cookie, startup_id_cookie, wm_hints_cookie;
00084 
00085 
00086     geomc = xcb_get_geometry(conn, d);
00087 #define FREE_GEOMETRY() do { \
00088     if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) != NULL) \
00089         free(geom); \
00090 } while (0)
00091 
00092     /* Check if the window is mapped (it could be not mapped when intializing and
00093        calling manage_window() for every window) */
00094     if ((attr = xcb_get_window_attributes_reply(conn, cookie, 0)) == NULL) {
00095         DLOG("Could not get attributes\n");
00096         FREE_GEOMETRY();
00097         return;
00098     }
00099 
00100     if (needs_to_be_mapped && attr->map_state != XCB_MAP_STATE_VIEWABLE) {
00101         FREE_GEOMETRY();
00102         goto out;
00103     }
00104 
00105     /* Don’t manage clients with the override_redirect flag */
00106     if (attr->override_redirect) {
00107         FREE_GEOMETRY();
00108         goto out;
00109     }
00110 
00111     /* Check if the window is already managed */
00112     if (con_by_window_id(window) != NULL) {
00113         DLOG("already managed (by con %p)\n", con_by_window_id(window));
00114         FREE_GEOMETRY();
00115         goto out;
00116     }
00117 
00118     /* Get the initial geometry (position, size, …) */
00119     if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) {
00120         DLOG("could not get geometry\n");
00121         goto out;
00122     }
00123 
00124     uint32_t values[1];
00125 
00126     /* Set a temporary event mask for the new window, consisting only of
00127      * PropertyChange. We need to be notified of PropertyChanges because the
00128      * client can change its properties *after* we requested them but *before*
00129      * we actually reparented it and have set our final event mask. */
00130     values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
00131     xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK, values);
00132 
00133 #define GET_PROPERTY(atom, len) xcb_get_property(conn, false, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, len)
00134 
00135     wm_type_cookie = GET_PROPERTY(A__NET_WM_WINDOW_TYPE, UINT32_MAX);
00136     strut_cookie = GET_PROPERTY(A__NET_WM_STRUT_PARTIAL, UINT32_MAX);
00137     state_cookie = GET_PROPERTY(A__NET_WM_STATE, UINT32_MAX);
00138     utf8_title_cookie = GET_PROPERTY(A__NET_WM_NAME, 128);
00139     leader_cookie = GET_PROPERTY(A_WM_CLIENT_LEADER, UINT32_MAX);
00140     transient_cookie = GET_PROPERTY(XCB_ATOM_WM_TRANSIENT_FOR, UINT32_MAX);
00141     title_cookie = GET_PROPERTY(XCB_ATOM_WM_NAME, 128);
00142     class_cookie = GET_PROPERTY(XCB_ATOM_WM_CLASS, 128);
00143     role_cookie = GET_PROPERTY(A_WM_WINDOW_ROLE, 128);
00144     startup_id_cookie = GET_PROPERTY(A__NET_STARTUP_ID, 512);
00145     wm_hints_cookie = xcb_icccm_get_wm_hints(conn, window);
00146     /* TODO: also get wm_normal_hints here. implement after we got rid of xcb-event */
00147 
00148     DLOG("Managing window 0x%08x\n", window);
00149 
00150     i3Window *cwindow = scalloc(sizeof(i3Window));
00151     cwindow->id = window;
00152 
00153     /* We need to grab the mouse buttons for click to focus */
00154     xcb_grab_button(conn, false, window, XCB_EVENT_MASK_BUTTON_PRESS,
00155                     XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, root, XCB_NONE,
00156                     1 /* left mouse button */,
00157                     XCB_BUTTON_MASK_ANY /* don’t filter for any modifiers */);
00158 
00159     xcb_grab_button(conn, false, window, XCB_EVENT_MASK_BUTTON_PRESS,
00160                     XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, root, XCB_NONE,
00161                     3 /* right mouse button */,
00162                     XCB_BUTTON_MASK_ANY /* don’t filter for any modifiers */);
00163 
00164 
00165     /* update as much information as possible so far (some replies may be NULL) */
00166     window_update_class(cwindow, xcb_get_property_reply(conn, class_cookie, NULL), true);
00167     window_update_name_legacy(cwindow, xcb_get_property_reply(conn, title_cookie, NULL), true);
00168     window_update_name(cwindow, xcb_get_property_reply(conn, utf8_title_cookie, NULL), true);
00169     window_update_leader(cwindow, xcb_get_property_reply(conn, leader_cookie, NULL));
00170     window_update_transient_for(cwindow, xcb_get_property_reply(conn, transient_cookie, NULL));
00171     window_update_strut_partial(cwindow, xcb_get_property_reply(conn, strut_cookie, NULL));
00172     window_update_role(cwindow, xcb_get_property_reply(conn, role_cookie, NULL), true);
00173     window_update_hints(cwindow, xcb_get_property_reply(conn, wm_hints_cookie, NULL));
00174 
00175     xcb_get_property_reply_t *startup_id_reply;
00176     startup_id_reply = xcb_get_property_reply(conn, startup_id_cookie, NULL);
00177     char *startup_ws = startup_workspace_for_window(cwindow, startup_id_reply);
00178     DLOG("startup workspace = %s\n", startup_ws);
00179 
00180     /* check if the window needs WM_TAKE_FOCUS */
00181     cwindow->needs_take_focus = window_supports_protocol(cwindow->id, A_WM_TAKE_FOCUS);
00182 
00183     /* Where to start searching for a container that swallows the new one? */
00184     Con *search_at = croot;
00185 
00186     xcb_get_property_reply_t *reply = xcb_get_property_reply(conn, wm_type_cookie, NULL);
00187     if (xcb_reply_contains_atom(reply, A__NET_WM_WINDOW_TYPE_DOCK)) {
00188         LOG("This window is of type dock\n");
00189         Output *output = get_output_containing(geom->x, geom->y);
00190         if (output != NULL) {
00191             DLOG("Starting search at output %s\n", output->name);
00192             search_at = output->con;
00193         }
00194 
00195         /* find out the desired position of this dock window */
00196         if (cwindow->reserved.top > 0 && cwindow->reserved.bottom == 0) {
00197             DLOG("Top dock client\n");
00198             cwindow->dock = W_DOCK_TOP;
00199         } else if (cwindow->reserved.top == 0 && cwindow->reserved.bottom > 0) {
00200             DLOG("Bottom dock client\n");
00201             cwindow->dock = W_DOCK_BOTTOM;
00202         } else {
00203             DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n");
00204             if (geom->y < (search_at->rect.height / 2)) {
00205                 DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n",
00206                      geom->y, (search_at->rect.height / 2));
00207                 cwindow->dock = W_DOCK_TOP;
00208             } else {
00209                 DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n",
00210                      geom->y, (search_at->rect.height / 2));
00211                 cwindow->dock = W_DOCK_BOTTOM;
00212             }
00213         }
00214     }
00215 
00216     DLOG("Initial geometry: (%d, %d, %d, %d)\n", geom->x, geom->y, geom->width, geom->height);
00217 
00218     Con *nc = NULL;
00219     Match *match;
00220     Assignment *assignment;
00221 
00222     /* TODO: two matches for one container */
00223 
00224     /* See if any container swallows this new window */
00225     nc = con_for_window(search_at, cwindow, &match);
00226     if (nc == NULL) {
00227         /* If not, check if it is assigned to a specific workspace / output */
00228         if ((assignment = assignment_for(cwindow, A_TO_WORKSPACE | A_TO_OUTPUT))) {
00229             DLOG("Assignment matches (%p)\n", match);
00230             if (assignment->type == A_TO_WORKSPACE) {
00231                 nc = con_descend_tiling_focused(workspace_get(assignment->dest.workspace, NULL));
00232                 DLOG("focused on ws %s: %p / %s\n", assignment->dest.workspace, nc, nc->name);
00233                 if (nc->type == CT_WORKSPACE)
00234                     nc = tree_open_con(nc, cwindow);
00235                 else nc = tree_open_con(nc->parent, cwindow);
00236             }
00237         /* TODO: handle assignments with type == A_TO_OUTPUT */
00238         } else if (startup_ws) {
00239             /* If it’s not assigned, but was started on a specific workspace,
00240              * we want to open it there */
00241             DLOG("Using workspace on which this application was started (%s)\n", startup_ws);
00242             nc = con_descend_tiling_focused(workspace_get(startup_ws, NULL));
00243             DLOG("focused on ws %s: %p / %s\n", startup_ws, nc, nc->name);
00244             if (nc->type == CT_WORKSPACE)
00245                 nc = tree_open_con(nc, cwindow);
00246             else nc = tree_open_con(nc->parent, cwindow);
00247         } else {
00248             /* If not, insert it at the currently focused position */
00249             if (focused->type == CT_CON && con_accepts_window(focused)) {
00250                 LOG("using current container, focused = %p, focused->name = %s\n",
00251                                 focused, focused->name);
00252                 nc = focused;
00253             } else nc = tree_open_con(NULL, cwindow);
00254         }
00255     } else {
00256         /* M_BELOW inserts the new window as a child of the one which was
00257          * matched (e.g. dock areas) */
00258         if (match != NULL && match->insert_where == M_BELOW) {
00259             nc = tree_open_con(nc, cwindow);
00260         }
00261     }
00262 
00263     DLOG("new container = %p\n", nc);
00264     nc->window = cwindow;
00265     x_reinit(nc);
00266 
00267     nc->border_width = geom->border_width;
00268 
00269     char *name;
00270     sasprintf(&name, "[i3 con] container around %p", cwindow);
00271     x_set_name(nc, name);
00272     free(name);
00273 
00274     Con *ws = con_get_workspace(nc);
00275     Con *fs = (ws ? con_get_fullscreen_con(ws, CF_OUTPUT) : NULL);
00276     if (fs == NULL)
00277         fs = con_get_fullscreen_con(croot, CF_GLOBAL);
00278 
00279     if (fs == NULL) {
00280         DLOG("Not in fullscreen mode, focusing\n");
00281         if (!cwindow->dock) {
00282             /* Check that the workspace is visible and on the same output as
00283              * the current focused container. If the window was assigned to an
00284              * invisible workspace, we should not steal focus. */
00285             Con *current_output = con_get_output(focused);
00286             Con *target_output = con_get_output(ws);
00287 
00288             if (workspace_is_visible(ws) && current_output == target_output) {
00289                 con_focus(nc);
00290             } else DLOG("workspace not visible, not focusing\n");
00291         } else DLOG("dock, not focusing\n");
00292     } else {
00293         DLOG("fs = %p, ws = %p, not focusing\n", fs, ws);
00294         /* Insert the new container in focus stack *after* the currently
00295          * focused (fullscreen) con. This way, the new container will be
00296          * focused after we return from fullscreen mode */
00297         Con *first = TAILQ_FIRST(&(nc->parent->focus_head));
00298         if (first != nc) {
00299             /* We only modify the focus stack if the container is not already
00300              * the first one. This can happen when existing containers swallow
00301              * new windows, for example when restarting. */
00302             TAILQ_REMOVE(&(nc->parent->focus_head), nc, focused);
00303             TAILQ_INSERT_AFTER(&(nc->parent->focus_head), first, nc, focused);
00304         }
00305     }
00306 
00307     /* set floating if necessary */
00308     bool want_floating = false;
00309     if (xcb_reply_contains_atom(reply, A__NET_WM_WINDOW_TYPE_DIALOG) ||
00310         xcb_reply_contains_atom(reply, A__NET_WM_WINDOW_TYPE_UTILITY) ||
00311         xcb_reply_contains_atom(reply, A__NET_WM_WINDOW_TYPE_TOOLBAR) ||
00312         xcb_reply_contains_atom(reply, A__NET_WM_WINDOW_TYPE_SPLASH)) {
00313         LOG("This window is a dialog window, setting floating\n");
00314         want_floating = true;
00315     }
00316 
00317     FREE(reply);
00318 
00319     if (cwindow->transient_for != XCB_NONE ||
00320         (cwindow->leader != XCB_NONE &&
00321          cwindow->leader != cwindow->id &&
00322          con_by_window_id(cwindow->leader) != NULL)) {
00323         LOG("This window is transiert for another window, setting floating\n");
00324         want_floating = true;
00325 
00326         if (config.popup_during_fullscreen == PDF_LEAVE_FULLSCREEN &&
00327             fs != NULL) {
00328             LOG("There is a fullscreen window, leaving fullscreen mode\n");
00329             con_toggle_fullscreen(fs, CF_OUTPUT);
00330         }
00331     }
00332 
00333     /* dock clients cannot be floating, that makes no sense */
00334     if (cwindow->dock)
00335         want_floating = false;
00336 
00337     /* Store the requested geometry. The width/height gets raised to at least
00338      * 75x50 when entering floating mode, which is the minimum size for a
00339      * window to be useful (smaller windows are usually overlays/toolbars/…
00340      * which are not managed by the wm anyways). We store the original geometry
00341      * here because it’s used for dock clients. */
00342     nc->geometry = (Rect){ geom->x, geom->y, geom->width, geom->height };
00343 
00344     if (want_floating) {
00345         DLOG("geometry = %d x %d\n", nc->geometry.width, nc->geometry.height);
00346         floating_enable(nc, true);
00347     }
00348 
00349     /* to avoid getting an UnmapNotify event due to reparenting, we temporarily
00350      * declare no interest in any state change event of this window */
00351     values[0] = XCB_NONE;
00352     xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK, values);
00353 
00354     xcb_void_cookie_t rcookie = xcb_reparent_window_checked(conn, window, nc->frame, 0, 0);
00355     if (xcb_request_check(conn, rcookie) != NULL) {
00356         LOG("Could not reparent the window, aborting\n");
00357         goto geom_out;
00358     }
00359 
00360     values[0] = CHILD_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
00361     xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK, values);
00362     xcb_flush(conn);
00363 
00364     reply = xcb_get_property_reply(conn, state_cookie, NULL);
00365     if (xcb_reply_contains_atom(reply, A__NET_WM_STATE_FULLSCREEN))
00366         con_toggle_fullscreen(nc, CF_OUTPUT);
00367 
00368     FREE(reply);
00369 
00370     /* Put the client inside the save set. Upon termination (whether killed or
00371      * normal exit does not matter) of the window manager, these clients will
00372      * be correctly reparented to their most closest living ancestor (=
00373      * cleanup) */
00374     xcb_change_save_set(conn, XCB_SET_MODE_INSERT, window);
00375 
00376     /* Check if any assignments match */
00377     run_assignments(cwindow);
00378 
00379     tree_render();
00380 
00381 geom_out:
00382     free(geom);
00383 out:
00384     free(attr);
00385     return;
00386 }