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