#undef I3__FILE__ #define I3__FILE__ "handlers.c" /* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager * © 2009 Michael Stapelberg and contributors (see also: LICENSE) * * handlers.c: Small handlers for various events (keypresses, focus changes, * …). * */ #include "all.h" #include #include #include #include #define SN_API_NOT_YET_FROZEN 1 #include int randr_base = -1; int xkb_base = -1; int xkb_current_group; /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it, since it’d trigger an infinite loop of switching between the different windows when changing workspaces */ static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events; /* * Adds the given sequence to the list of events which are ignored. * If this ignore should only affect a specific response_type, pass * response_type, otherwise, pass -1. * * Every ignored sequence number gets garbage collected after 5 seconds. * */ void add_ignore_event(const int sequence, const int response_type) { struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event)); event->sequence = sequence; event->response_type = response_type; event->added = time(NULL); SLIST_INSERT_HEAD(&ignore_events, event, ignore_events); } /* * Checks if the given sequence is ignored and returns true if so. * */ bool event_is_ignored(const int sequence, const int response_type) { struct Ignore_Event *event; time_t now = time(NULL); for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) { if ((now - event->added) > 5) { struct Ignore_Event *save = event; event = SLIST_NEXT(event, ignore_events); SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events); free(save); } else event = SLIST_NEXT(event, ignore_events); } SLIST_FOREACH(event, &ignore_events, ignore_events) { if (event->sequence != sequence) continue; if (event->response_type != -1 && event->response_type != response_type) continue; /* instead of removing a sequence number we better wait until it gets * garbage collected. it may generate multiple events (there are multiple * enter_notifies for one configure_request, for example). */ //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events); //free(event); return true; } return false; } /* * Called with coordinates of an enter_notify event or motion_notify event * to check if the user crossed virtual screen boundaries and adjust the * current workspace, if so. * */ static void check_crossing_screen_boundary(uint32_t x, uint32_t y) { Output *output; /* If the user disable focus follows mouse, we have nothing to do here */ if (config.disable_focus_follows_mouse) return; if ((output = get_output_containing(x, y)) == NULL) { ELOG("ERROR: No such screen\n"); return; } if (output->con == NULL) { ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n"); return; } /* Focus the output on which the user moved their cursor */ Con *old_focused = focused; Con *next = con_descend_focused(output_get_content(output->con)); /* Since we are switching outputs, this *must* be a different workspace, so * call workspace_show() */ workspace_show(con_get_workspace(next)); con_focus(next); /* If the focus changed, we re-render to get updated decorations */ if (old_focused != focused) tree_render(); } /* * When the user moves the mouse pointer onto a window, this callback gets called. * */ static void handle_enter_notify(xcb_enter_notify_event_t *event) { Con *con; last_timestamp = event->time; DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n", event->event, event->mode, event->detail, event->sequence); DLOG("coordinates %d, %d\n", event->event_x, event->event_y); if (event->mode != XCB_NOTIFY_MODE_NORMAL) { DLOG("This was not a normal notify, ignoring\n"); return; } /* Some events are not interesting, because they were not generated * actively by the user, but by reconfiguration of windows */ if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) { DLOG("Event ignored\n"); return; } bool enter_child = false; /* Get container by frame or by child window */ if ((con = con_by_frame_id(event->event)) == NULL) { con = con_by_window_id(event->event); enter_child = true; } /* If not, then the user moved their cursor to the root window. In that case, we adjust c_ws */ if (con == NULL) { DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y); check_crossing_screen_boundary(event->root_x, event->root_y); return; } if (con->parent->type == CT_DOCKAREA) { DLOG("Ignoring, this is a dock client\n"); return; } /* see if the user entered the window on a certain window decoration */ layout_t layout = (enter_child ? con->parent->layout : con->layout); if (layout == L_DEFAULT) { Con *child; TAILQ_FOREACH(child, &(con->nodes_head), nodes) if (rect_contains(child->deco_rect, event->event_x, event->event_y)) { LOG("using child %p / %s instead!\n", child, child->name); con = child; break; } } #if 0 if (client->workspace != c_ws && client->workspace->output == c_ws->output) { /* This can happen when a client gets assigned to a different workspace than * the current one (see src/mainx.c:reparent_window). Shortly after it was created, * an enter_notify will follow. */ DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n"); return 1; } #endif if (config.disable_focus_follows_mouse) return; /* if this container is already focused, there is nothing to do. */ if (con == focused) return; /* Get the currently focused workspace to check if the focus change also * involves changing workspaces. If so, we need to call workspace_show() to * correctly update state and send the IPC event. */ Con *ws = con_get_workspace(con); if (ws != con_get_workspace(focused)) workspace_show(ws); focused_id = XCB_NONE; con_focus(con_descend_focused(con)); tree_render(); return; } /* * When the user moves the mouse but does not change the active window * (e.g. when having no windows opened but moving mouse on the root screen * and crossing virtual screen boundaries), this callback gets called. * */ static void handle_motion_notify(xcb_motion_notify_event_t *event) { last_timestamp = event->time; /* Skip events where the pointer was over a child window, we are only * interested in events on the root window. */ if (event->child != XCB_NONE) return; Con *con; if ((con = con_by_frame_id(event->event)) == NULL) { DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n"); check_crossing_screen_boundary(event->root_x, event->root_y); return; } if (config.disable_focus_follows_mouse) return; if (con->layout != L_DEFAULT && con->layout != L_SPLITV && con->layout != L_SPLITH) return; /* see over which rect the user is */ Con *current; TAILQ_FOREACH(current, &(con->nodes_head), nodes) { if (!rect_contains(current->deco_rect, event->event_x, event->event_y)) continue; /* We found the rect, let’s see if this window is focused */ if (TAILQ_FIRST(&(con->focus_head)) == current) return; con_focus(current); x_push_changes(croot); return; } } /* * Called when the keyboard mapping changes (for example by using Xmodmap), * we need to update our key bindings then (re-translate symbols). * */ static void handle_mapping_notify(xcb_mapping_notify_event_t *event) { if (event->request != XCB_MAPPING_KEYBOARD && event->request != XCB_MAPPING_MODIFIER) return; DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n"); xcb_refresh_keyboard_mapping(keysyms, event); xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms); ungrab_all_keys(conn); translate_keysyms(); grab_all_keys(conn); return; } /* * A new window appeared on the screen (=was mapped), so let’s manage it. * */ static void handle_map_request(xcb_map_request_event_t *event) { xcb_get_window_attributes_cookie_t cookie; cookie = xcb_get_window_attributes_unchecked(conn, event->window); DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence); add_ignore_event(event->sequence, -1); manage_window(event->window, cookie, false); return; } /* * Configure requests are received when the application wants to resize windows * on their own. * * We generate a synthethic configure notify event to signalize the client its * "new" position. * */ static void handle_configure_request(xcb_configure_request_event_t *event) { Con *con; DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n", event->window, event->x, event->y, event->width, event->height); /* For unmanaged windows, we just execute the configure request. As soon as * it gets mapped, we will take over anyways. */ if ((con = con_by_window_id(event->window)) == NULL) { DLOG("Configure request for unmanaged window, can do that.\n"); uint32_t mask = 0; uint32_t values[7]; int c = 0; #define COPY_MASK_MEMBER(mask_member, event_member) \ do { \ if (event->value_mask & mask_member) { \ mask |= mask_member; \ values[c++] = event->event_member; \ } \ } while (0) COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling); COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode); xcb_configure_window(conn, event->window, mask, values); xcb_flush(conn); return; } DLOG("Configure request!\n"); Con *workspace = con_get_workspace(con), *fullscreen = NULL; /* There might not be a corresponding workspace for dock cons, therefore we * have to be careful here. */ if (workspace) { fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT); if (!fullscreen) fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL); } if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) { /* find the height for the decorations */ int deco_height = con->deco_rect.height; /* we actually need to apply the size/position changes to the *parent* * container */ Rect bsr = con_border_style_rect(con); if (con->border_style == BS_NORMAL) { bsr.y += deco_height; bsr.height -= deco_height; } Con *floatingcon = con->parent; if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) { DLOG("This is a scratchpad container, ignoring ConfigureRequest\n"); return; } Rect newrect = floatingcon->rect; if (event->value_mask & XCB_CONFIG_WINDOW_X) { newrect.x = event->x + (-1) * bsr.x; DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x); } if (event->value_mask & XCB_CONFIG_WINDOW_Y) { newrect.y = event->y + (-1) * bsr.y; DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y); } if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) { newrect.width = event->width + (-1) * bsr.width; newrect.width += con->border_width * 2; DLOG("proposed width = %d, new width is %d (x11 border %d)\n", event->width, newrect.width, con->border_width); } if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) { newrect.height = event->height + (-1) * bsr.height; newrect.height += con->border_width * 2; DLOG("proposed height = %d, new height is %d (x11 border %d)\n", event->height, newrect.height, con->border_width); } DLOG("Container is a floating leaf node, will do that.\n"); floating_reposition(floatingcon, newrect); return; } /* Dock windows can be reconfigured in their height and moved to another output. */ if (con->parent && con->parent->type == CT_DOCKAREA) { DLOG("Reconfiguring dock window (con = %p).\n", con); if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) { DLOG("Dock client wants to change height to %d, we can do that.\n", event->height); con->geometry.height = event->height; tree_render(); } if (event->value_mask & XCB_CONFIG_WINDOW_X || event->value_mask & XCB_CONFIG_WINDOW_Y) { int16_t x = event->value_mask & XCB_CONFIG_WINDOW_X ? event->x : (int16_t)con->geometry.x; int16_t y = event->value_mask & XCB_CONFIG_WINDOW_Y ? event->y : (int16_t)con->geometry.y; Con *current_output = con_get_output(con); Output *target = get_output_containing(x, y); if (target != NULL && current_output != target->con) { DLOG("Dock client is requested to be moved to output %s, moving it there.\n", target->name); Match *match; Con *nc = con_for_window(target->con, con->window, &match); DLOG("Dock client will be moved to container %p.\n", nc); con_detach(con); con_attach(con, nc, false); tree_render(); } else { DLOG("Dock client will not be moved, we only support moving it to another output.\n"); } } } fake_absolute_configure_notify(con); return; } #if 0 /* * Configuration notifies are only handled because we need to set up ignore for * the following enter notify events. * */ int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) { DLOG("configure_event, sequence %d\n", event->sequence); /* We ignore this sequence twice because events for child and frame should be ignored */ add_ignore_event(event->sequence); add_ignore_event(event->sequence); return 1; } #endif /* * Gets triggered upon a RandR screen change event, that is when the user * changes the screen configuration in any way (mode, position, …) * */ static void handle_screen_change(xcb_generic_event_t *e) { DLOG("RandR screen change\n"); /* The geometry of the root window is used for “fullscreen global” and * changes when new outputs are added. */ xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root); xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL); if (reply == NULL) { ELOG("Could not get geometry of the root window, exiting\n"); exit(1); } DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height); croot->rect.width = reply->width; croot->rect.height = reply->height; randr_query_outputs(); scratchpad_fix_resolution(); ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}"); return; } /* * Our window decorations were unmapped. That means, the window will be killed * now, so we better clean up before. * */ static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) { DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence); xcb_get_input_focus_cookie_t cookie; Con *con = con_by_window_id(event->window); if (con == NULL) { /* This could also be an UnmapNotify for the frame. We need to * decrement the ignore_unmap counter. */ con = con_by_frame_id(event->window); if (con == NULL) { LOG("Not a managed window, ignoring UnmapNotify event\n"); return; } if (con->ignore_unmap > 0) con->ignore_unmap--; /* See the end of this function. */ cookie = xcb_get_input_focus(conn); DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con); goto ignore_end; } /* See the end of this function. */ cookie = xcb_get_input_focus(conn); if (con->ignore_unmap > 0) { DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap); con->ignore_unmap--; goto ignore_end; } tree_close(con, DONT_KILL_WINDOW, false, false); tree_render(); ignore_end: /* If the client (as opposed to i3) destroyed or unmapped a window, an * EnterNotify event will follow (indistinguishable from an EnterNotify * event caused by moving your mouse), causing i3 to set focus to whichever * window is now visible. * * In a complex stacked or tabbed layout (take two v-split containers in a * tabbed container), when the bottom window in tab2 is closed, the bottom * window of tab1 is visible instead. X11 will thus send an EnterNotify * event for the bottom window of tab1, while the focus should be set to * the remaining window of tab2. * * Therefore, we ignore all EnterNotify events which have the same sequence * as an UnmapNotify event. */ add_ignore_event(event->sequence, XCB_ENTER_NOTIFY); /* Since we just ignored the sequence of this UnmapNotify, we want to make * sure that following events use a different sequence. When putting xterm * into fullscreen and moving the pointer to a different window, without * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived * with the same sequence and thus were ignored (see ticket #609). */ free(xcb_get_input_focus_reply(conn, cookie, NULL)); } /* * A destroy notify event is sent when the window is not unmapped, but * immediately destroyed (for example when starting a window and immediately * killing the program which started it). * * We just pass on the event to the unmap notify handler (by copying the * important fields in the event data structure). * */ static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) { DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window); xcb_unmap_notify_event_t unmap; unmap.sequence = event->sequence; unmap.event = event->event; unmap.window = event->window; handle_unmap_notify_event(&unmap); } static bool window_name_changed(i3Window *window, char *old_name) { if ((old_name == NULL) && (window->name == NULL)) return false; /* Either the old or the new one is NULL, but not both. */ if ((old_name == NULL) ^ (window->name == NULL)) return true; return (strcmp(old_name, i3string_as_utf8(window->name)) != 0); } /* * Called when a window changes its title * */ static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL); window_update_name(con->window, prop, false); x_push_changes(croot); if (window_name_changed(con->window, old_name)) ipc_send_window_event("title", con); FREE(old_name); return true; } /* * Handles legacy window name updates (WM_NAME), see also src/window.c, * window_update_name_legacy(). * */ static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL); window_update_name_legacy(con->window, prop, false); x_push_changes(croot); if (window_name_changed(con->window, old_name)) ipc_send_window_event("title", con); FREE(old_name); return true; } /* * Called when a window changes its WM_WINDOW_ROLE. * */ static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; window_update_role(con->window, prop, false); return true; } #if 0 /* * Updates the client’s WM_CLASS property * */ static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return 1; window_update_class(con->window, prop, false); return 0; } #endif /* * Expose event means we should redraw our windows (= title bar) * */ static void handle_expose_event(xcb_expose_event_t *event) { Con *parent; DLOG("window = %08x\n", event->window); if ((parent = con_by_frame_id(event->window)) == NULL) { LOG("expose event for unknown window, ignoring\n"); return; } /* Since we render to our pixmap on every change anyways, expose events * only tell us that the X server lost (parts of) the window contents. We * can handle that by copying the appropriate part from our pixmap to the * window. */ xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc, event->x, event->y, event->x, event->y, event->width, event->height); xcb_flush(conn); return; } #define _NET_WM_MOVERESIZE_SIZE_TOPLEFT 0 #define _NET_WM_MOVERESIZE_SIZE_TOP 1 #define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT 2 #define _NET_WM_MOVERESIZE_SIZE_RIGHT 3 #define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT 4 #define _NET_WM_MOVERESIZE_SIZE_BOTTOM 5 #define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT 6 #define _NET_WM_MOVERESIZE_SIZE_LEFT 7 #define _NET_WM_MOVERESIZE_MOVE 8 /* movement only */ #define _NET_WM_MOVERESIZE_SIZE_KEYBOARD 9 /* size via keyboard */ #define _NET_WM_MOVERESIZE_MOVE_KEYBOARD 10 /* move via keyboard */ #define _NET_WM_MOVERESIZE_CANCEL 11 /* cancel operation */ /* * Handle client messages (EWMH) * */ static void handle_client_message(xcb_client_message_event_t *event) { /* If this is a startup notification ClientMessage, the library will handle * it and call our monitor_event() callback. */ if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event)) return; LOG("ClientMessage for window 0x%08x\n", event->window); if (event->type == A__NET_WM_STATE) { if (event->format != 32 || (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN && event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION)) { DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]); return; } Con *con = con_by_window_id(event->window); if (con == NULL) { DLOG("Could not get window for client message\n"); return; } if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) { /* Check if the fullscreen state should be toggled */ if ((con->fullscreen_mode != CF_NONE && (event->data.data32[0] == _NET_WM_STATE_REMOVE || event->data.data32[0] == _NET_WM_STATE_TOGGLE)) || (con->fullscreen_mode == CF_NONE && (event->data.data32[0] == _NET_WM_STATE_ADD || event->data.data32[0] == _NET_WM_STATE_TOGGLE))) { DLOG("toggling fullscreen\n"); con_toggle_fullscreen(con, CF_OUTPUT); } } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) { /* Check if the urgent flag must be set or not */ if (event->data.data32[0] == _NET_WM_STATE_ADD) con_set_urgency(con, true); else if (event->data.data32[0] == _NET_WM_STATE_REMOVE) con_set_urgency(con, false); else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE) con_set_urgency(con, !con->urgent); } tree_render(); } else if (event->type == A__NET_ACTIVE_WINDOW) { if (event->format != 32) return; DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window); Con *con = con_by_window_id(event->window); if (con == NULL) { DLOG("Could not get window for client message\n"); return; } Con *ws = con_get_workspace(con); if (ws == NULL) { DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n"); return; } if (con_is_internal(ws)) { DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n"); return; } /* data32[0] indicates the source of the request (application or pager) */ if (event->data.data32[0] == 2) { /* Always focus the con if it is from a pager, because this is most * likely from some user action */ DLOG("This request came from a pager. Focusing con = %p\n", con); workspace_show(ws); con_focus(con); } else { /* Request is from an application. */ if (config.focus_on_window_activation == FOWA_FOCUS || (config.focus_on_window_activation == FOWA_SMART && workspace_is_visible(ws))) { DLOG("Focusing con = %p\n", con); workspace_show(ws); con_focus(con); } else if (config.focus_on_window_activation == FOWA_URGENT || (config.focus_on_window_activation == FOWA_SMART && !workspace_is_visible(ws))) { DLOG("Marking con = %p urgent\n", con); con_set_urgency(con, true); } else DLOG("Ignoring request for con = %p.\n", con); } tree_render(); } else if (event->type == A_I3_SYNC) { xcb_window_t window = event->data.data32[0]; uint32_t rnd = event->data.data32[1]; DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window); void *reply = scalloc(32, 1); xcb_client_message_event_t *ev = reply; ev->response_type = XCB_CLIENT_MESSAGE; ev->window = window; ev->type = A_I3_SYNC; ev->format = 32; ev->data.data32[0] = window; ev->data.data32[1] = rnd; xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev); xcb_flush(conn); free(reply); } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) { /* * A client can request an estimate for the frame size which the window * manager will put around it before actually mapping its window. Java * does this (as of openjdk-7). * * Note that the calculation below is not entirely accurate — once you * set a different border type, it’s off. We _could_ request all the * window properties (which have to be set up at this point according * to EWMH), but that seems rather elaborate. The standard explicitly * says the application must cope with an estimate that is not entirely * accurate. */ DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window); /* The reply data: approximate frame size */ Rect r = { config.default_border_width, /* left */ config.default_border_width, /* right */ config.font.height + 5, /* top */ config.default_border_width /* bottom */ }; xcb_change_property( conn, XCB_PROP_MODE_REPLACE, event->window, A__NET_FRAME_EXTENTS, XCB_ATOM_CARDINAL, 32, 4, &r); xcb_flush(conn); } else if (event->type == A__NET_CURRENT_DESKTOP) { /* This request is used by pagers and bars to change the current * desktop likely as a result of some user action. We interpret this as * a request to focus the given workspace. See * http://standards.freedesktop.org/wm-spec/latest/ar01s03.html#idm140251368135008 * */ Con *output; uint32_t idx = 0; DLOG("Request to change current desktop to index %d\n", event->data.data32[0]); TAILQ_FOREACH(output, &(croot->nodes_head), nodes) { Con *ws; TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) { if (STARTS_WITH(ws->name, "__")) continue; if (idx == event->data.data32[0]) { /* data32[1] is a timestamp used to prevent focus race conditions */ if (event->data.data32[1]) last_timestamp = event->data.data32[1]; DLOG("Handling request to focus workspace %s\n", ws->name); workspace_show(ws); tree_render(); return; } ++idx; } } } else if (event->type == A__NET_CLOSE_WINDOW) { /* * Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW * client message request to the root window. * http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472668896 */ Con *con = con_by_window_id(event->window); if (con) { DLOG("Handling _NET_CLOSE_WINDOW request (con = %p)\n", con); if (event->data.data32[0]) last_timestamp = event->data.data32[0]; tree_close(con, KILL_WINDOW, false, false); tree_render(); } else { DLOG("Couldn't find con for _NET_CLOSE_WINDOW request. (window = %d)\n", event->window); } } else if (event->type == A__NET_WM_MOVERESIZE) { /* * Client-side decorated Gtk3 windows emit this signal when being * dragged by their GtkHeaderBar */ Con *con = con_by_window_id(event->window); if (!con || !con_is_floating(con)) { DLOG("Couldn't find con for _NET_WM_MOVERESIZE request, or con not floating (window = %d)\n", event->window); return; } DLOG("Handling _NET_WM_MOVERESIZE request (con = %p)\n", con); uint32_t direction = event->data.data32[2]; uint32_t x_root = event->data.data32[0]; uint32_t y_root = event->data.data32[1]; /* construct fake xcb_button_press_event_t */ xcb_button_press_event_t fake = { .root_x = x_root, .root_y = y_root, .event_x = x_root - (con->rect.x), .event_y = y_root - (con->rect.y)}; switch (direction) { case _NET_WM_MOVERESIZE_MOVE: floating_drag_window(con->parent, &fake); break; case _NET_WM_MOVERESIZE_SIZE_TOPLEFT... _NET_WM_MOVERESIZE_SIZE_LEFT: floating_resize_window(con->parent, false, &fake); break; default: DLOG("_NET_WM_MOVERESIZE direction %d not implemented\n", direction); break; } } else { DLOG("unhandled clientmessage\n"); return; } } bool handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *reply) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; window_update_type(con->window, reply); return true; } /* * Handles the size hints set by a window, but currently only the part necessary for displaying * clients proportionally inside their frames (mplayer for example) * * See ICCCM 4.1.2.3 for more details * */ static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *reply) { Con *con = con_by_window_id(window); if (con == NULL) { DLOG("Received WM_NORMAL_HINTS for unknown client\n"); return false; } xcb_size_hints_t size_hints; //CLIENT_LOG(client); /* If the hints were already in this event, use them, if not, request them */ if (reply != NULL) xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply); else xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL); if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) { // TODO: Minimum size is not yet implemented DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height); } bool changed = false; if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) { if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF) if (con->window->width_increment != size_hints.width_inc) { con->window->width_increment = size_hints.width_inc; changed = true; } if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF) if (con->window->height_increment != size_hints.height_inc) { con->window->height_increment = size_hints.height_inc; changed = true; } if (changed) DLOG("resize increments changed\n"); } int base_width = 0, base_height = 0; /* base_width/height are the desired size of the window. We check if either the program-specified size or the program-specified min-size is available */ if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) { base_width = size_hints.base_width; base_height = size_hints.base_height; } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) { /* TODO: is this right? icccm says not */ base_width = size_hints.min_width; base_height = size_hints.min_height; } if (base_width != con->window->base_width || base_height != con->window->base_height) { con->window->base_width = base_width; con->window->base_height = base_height; DLOG("client's base_height changed to %d\n", base_height); DLOG("client's base_width changed to %d\n", base_width); changed = true; } /* If no aspect ratio was set or if it was invalid, we ignore the hints */ if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) || (size_hints.min_aspect_num <= 0) || (size_hints.min_aspect_den <= 0)) { goto render_and_return; } /* XXX: do we really use rect here, not window_rect? */ double width = con->rect.width - base_width; double height = con->rect.height - base_height; /* Convert numerator/denominator to a double */ double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den; double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den; DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect); DLOG("width = %f, height = %f\n", width, height); /* Sanity checks, this is user-input, in a way */ if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0) goto render_and_return; /* Check if we need to set proportional_* variables using the correct ratio */ double aspect_ratio = 0.0; if ((width / height) < min_aspect) { aspect_ratio = min_aspect; } else if ((width / height) > max_aspect) { aspect_ratio = max_aspect; } else goto render_and_return; if (fabs(con->window->aspect_ratio - aspect_ratio) > DBL_EPSILON) { con->window->aspect_ratio = aspect_ratio; changed = true; } render_and_return: if (changed) tree_render(); FREE(reply); return true; } /* * Handles the WM_HINTS property for extracting the urgency state of the window. * */ static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *reply) { Con *con = con_by_window_id(window); if (con == NULL) { DLOG("Received WM_HINTS for unknown client\n"); return false; } bool urgency_hint; if (reply == NULL) reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL); window_update_hints(con->window, reply, &urgency_hint); con_set_urgency(con, urgency_hint); tree_render(); return true; } /* * Handles the transient for hints set by a window, signalizing that this window is a popup window * for some other window. * * See ICCCM 4.1.2.6 for more details * */ static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) { DLOG("No such window\n"); return false; } if (prop == NULL) { prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn, false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL); if (prop == NULL) return false; } window_update_transient_for(con->window, prop); return true; } /* * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a * toolwindow (or similar) and to which window it belongs (logical parent). * */ static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; if (prop == NULL) { prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn, false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL); if (prop == NULL) return false; } window_update_leader(con->window, prop); return true; } /* * Handles FocusIn events which are generated by clients (i3’s focus changes * don’t generate FocusIn events due to a different EventMask) and updates the * decorations accordingly. * */ static void handle_focus_in(xcb_focus_in_event_t *event) { DLOG("focus change in, for window 0x%08x\n", event->event); Con *con; if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL) return; DLOG("That is con %p / %s\n", con, con->name); if (event->mode == XCB_NOTIFY_MODE_GRAB || event->mode == XCB_NOTIFY_MODE_UNGRAB) { DLOG("FocusIn event for grab/ungrab, ignoring\n"); return; } if (event->detail == XCB_NOTIFY_DETAIL_POINTER) { DLOG("notify detail is pointer, ignoring this event\n"); return; } if (focused_id == event->event) { DLOG("focus matches the currently focused window, not doing anything\n"); return; } /* Skip dock clients, they cannot get the i3 focus. */ if (con->parent->type == CT_DOCKAREA) { DLOG("This is a dock client, not focusing.\n"); return; } DLOG("focus is different, updating decorations\n"); /* Get the currently focused workspace to check if the focus change also * involves changing workspaces. If so, we need to call workspace_show() to * correctly update state and send the IPC event. */ Con *ws = con_get_workspace(con); if (ws != con_get_workspace(focused)) workspace_show(ws); con_focus(con); /* We update focused_id because we don’t need to set focus again */ focused_id = event->event; x_push_changes(croot); return; } /* * Handles the WM_CLASS property for assignments and criteria selection. * */ static bool handle_class_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *prop) { Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) return false; if (prop == NULL) { prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn, false, window, XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 0, 32), NULL); if (prop == NULL) return false; } window_update_class(con->window, prop, false); return true; } /* * Handles the _NET_WM_STRUT_PARTIAL property for allocating space for dock clients. * */ static bool handle_strut_partial_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window, xcb_atom_t name, xcb_get_property_reply_t *prop) { DLOG("strut partial change for window 0x%08x\n", window); Con *con; if ((con = con_by_window_id(window)) == NULL || con->window == NULL) { return false; } if (prop == NULL) { xcb_generic_error_t *err = NULL; xcb_get_property_cookie_t strut_cookie = xcb_get_property(conn, false, window, A__NET_WM_STRUT_PARTIAL, XCB_GET_PROPERTY_TYPE_ANY, 0, UINT32_MAX); prop = xcb_get_property_reply(conn, strut_cookie, &err); if (err != NULL) { DLOG("got error when getting strut partial property: %d\n", err->error_code); free(err); return false; } if (prop == NULL) { return false; } } DLOG("That is con %p / %s\n", con, con->name); window_update_strut_partial(con->window, prop); /* we only handle this change for dock clients */ if (con->parent == NULL || con->parent->type != CT_DOCKAREA) { return true; } Con *search_at = croot; Con *output = con_get_output(con); if (output != NULL) { DLOG("Starting search at output %s\n", output->name); search_at = output; } /* find out the desired position of this dock window */ if (con->window->reserved.top > 0 && con->window->reserved.bottom == 0) { DLOG("Top dock client\n"); con->window->dock = W_DOCK_TOP; } else if (con->window->reserved.top == 0 && con->window->reserved.bottom > 0) { DLOG("Bottom dock client\n"); con->window->dock = W_DOCK_BOTTOM; } else { DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n"); if (con->geometry.y < (search_at->rect.height / 2)) { DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n", con->geometry.y, (search_at->rect.height / 2)); con->window->dock = W_DOCK_TOP; } else { DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n", con->geometry.y, (search_at->rect.height / 2)); con->window->dock = W_DOCK_BOTTOM; } } /* find the dockarea */ Con *dockarea = con_for_window(search_at, con->window, NULL); assert(dockarea != NULL); /* attach the dock to the dock area */ con_detach(con); con->parent = dockarea; TAILQ_INSERT_HEAD(&(dockarea->focus_head), con, focused); TAILQ_INSERT_HEAD(&(dockarea->nodes_head), con, nodes); tree_render(); return true; } /* Returns false if the event could not be processed (e.g. the window could not * be found), true otherwise */ typedef bool (*cb_property_handler_t)(void *data, xcb_connection_t *c, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *property); struct property_handler_t { xcb_atom_t atom; uint32_t long_len; cb_property_handler_t cb; }; static struct property_handler_t property_handlers[] = { {0, 128, handle_windowname_change}, {0, UINT_MAX, handle_hints}, {0, 128, handle_windowname_change_legacy}, {0, UINT_MAX, handle_normal_hints}, {0, UINT_MAX, handle_clientleader_change}, {0, UINT_MAX, handle_transient_for}, {0, 128, handle_windowrole_change}, {0, 128, handle_class_change}, {0, UINT_MAX, handle_strut_partial_change}, {0, UINT_MAX, handle_window_type}}; #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t)) /* * Sets the appropriate atoms for the property handlers after the atoms were * received from X11 * */ void property_handlers_init(void) { sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL); property_handlers[0].atom = A__NET_WM_NAME; property_handlers[1].atom = XCB_ATOM_WM_HINTS; property_handlers[2].atom = XCB_ATOM_WM_NAME; property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS; property_handlers[4].atom = A_WM_CLIENT_LEADER; property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR; property_handlers[6].atom = A_WM_WINDOW_ROLE; property_handlers[7].atom = XCB_ATOM_WM_CLASS; property_handlers[8].atom = A__NET_WM_STRUT_PARTIAL; property_handlers[9].atom = A__NET_WM_WINDOW_TYPE; } static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) { struct property_handler_t *handler = NULL; xcb_get_property_reply_t *propr = NULL; for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) { if (property_handlers[c].atom != atom) continue; handler = &property_handlers[c]; break; } if (handler == NULL) { //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom); return; } if (state != XCB_PROPERTY_DELETE) { xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len); propr = xcb_get_property_reply(conn, cookie, 0); } /* the handler will free() the reply unless it returns false */ if (!handler->cb(NULL, conn, state, window, atom, propr)) FREE(propr); } /* * Takes an xcb_generic_event_t and calls the appropriate handler, based on the * event type. * */ void handle_event(int type, xcb_generic_event_t *event) { if (type != XCB_MOTION_NOTIFY) DLOG("event type %d, xkb_base %d\n", type, xkb_base); if (randr_base > -1 && type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) { handle_screen_change(event); return; } if (xkb_base > -1 && type == xkb_base) { DLOG("xkb event, need to handle it.\n"); xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event; if (state->xkbType == XCB_XKB_NEW_KEYBOARD_NOTIFY) { DLOG("xkb new keyboard notify, sequence %d, time %d\n", state->sequence, state->time); xcb_key_symbols_free(keysyms); keysyms = xcb_key_symbols_alloc(conn); ungrab_all_keys(conn); translate_keysyms(); grab_all_keys(conn); if (((xcb_xkb_new_keyboard_notify_event_t *)event)->changed & XCB_XKB_NKN_DETAIL_KEYCODES) (void)load_keymap(); } else if (state->xkbType == XCB_XKB_MAP_NOTIFY) { if (event_is_ignored(event->sequence, type)) { DLOG("Ignoring map notify event for sequence %d.\n", state->sequence); } else { DLOG("xkb map notify, sequence %d, time %d\n", state->sequence, state->time); add_ignore_event(event->sequence, type); xcb_key_symbols_free(keysyms); keysyms = xcb_key_symbols_alloc(conn); ungrab_all_keys(conn); translate_keysyms(); grab_all_keys(conn); (void)load_keymap(); } } else if (state->xkbType == XCB_XKB_STATE_NOTIFY) { DLOG("xkb state group = %d\n", state->group); if (xkb_current_group == state->group) return; xkb_current_group = state->group; ungrab_all_keys(conn); grab_all_keys(conn); } return; } switch (type) { case XCB_KEY_PRESS: case XCB_KEY_RELEASE: handle_key_press((xcb_key_press_event_t *)event); break; case XCB_BUTTON_PRESS: case XCB_BUTTON_RELEASE: handle_button_press((xcb_button_press_event_t *)event); break; case XCB_MAP_REQUEST: handle_map_request((xcb_map_request_event_t *)event); break; case XCB_UNMAP_NOTIFY: handle_unmap_notify_event((xcb_unmap_notify_event_t *)event); break; case XCB_DESTROY_NOTIFY: handle_destroy_notify_event((xcb_destroy_notify_event_t *)event); break; case XCB_EXPOSE: handle_expose_event((xcb_expose_event_t *)event); break; case XCB_MOTION_NOTIFY: handle_motion_notify((xcb_motion_notify_event_t *)event); break; /* Enter window = user moved their mouse over the window */ case XCB_ENTER_NOTIFY: handle_enter_notify((xcb_enter_notify_event_t *)event); break; /* Client message are sent to the root window. The only interesting * client message for us is _NET_WM_STATE, we honour * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */ case XCB_CLIENT_MESSAGE: handle_client_message((xcb_client_message_event_t *)event); break; /* Configure request = window tried to change size on its own */ case XCB_CONFIGURE_REQUEST: handle_configure_request((xcb_configure_request_event_t *)event); break; /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */ case XCB_MAPPING_NOTIFY: handle_mapping_notify((xcb_mapping_notify_event_t *)event); break; case XCB_FOCUS_IN: handle_focus_in((xcb_focus_in_event_t *)event); break; case XCB_PROPERTY_NOTIFY: { xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event; last_timestamp = e->time; property_notify(e->state, e->window, e->atom); break; } default: //DLOG("Unhandled event of type %d\n", type); break; } }