/* * vim:ts=4:sw=4:expandtab */ #include "all.h" /* Stores the X11 window ID of the currently focused window */ static xcb_window_t focused_id = XCB_NONE; /* * Describes the X11 state we may modify (map state, position, window stack). * There is one entry per container. The state represents the current situation * as X11 sees it (with the exception of the order in the state_head CIRCLEQ, * which represents the order that will be pushed to X11, while old_state_head * represents the current order). It will be updated in x_push_changes(). * */ typedef struct con_state { xcb_window_t id; bool mapped; bool child_mapped; /* For reparenting, we have a flag (need_reparent) and the X ID of the old * frame this window was in. The latter is necessary because we need to * ignore UnmapNotify events (by changing the window event mask). */ bool need_reparent; xcb_window_t old_frame; Rect rect; Rect window_rect; bool initial; char *name; CIRCLEQ_ENTRY(con_state) state; CIRCLEQ_ENTRY(con_state) old_state; } con_state; CIRCLEQ_HEAD(state_head, con_state) state_head = CIRCLEQ_HEAD_INITIALIZER(state_head); CIRCLEQ_HEAD(old_state_head, con_state) old_state_head = CIRCLEQ_HEAD_INITIALIZER(old_state_head); /* * Returns the container state for the given frame. This function always * returns a container state (otherwise, there is a bug in the code and the * container state of a container for which x_con_init() was not called was * requested). * */ static con_state *state_for_frame(xcb_window_t window) { con_state *state; CIRCLEQ_FOREACH(state, &state_head, state) if (state->id == window) return state; /* TODO: better error handling? */ ELOG("No state found\n"); assert(false); return NULL; } /* * Initializes the X11 part for the given container. Called exactly once for * every container from con_new(). * */ void x_con_init(Con *con) { /* TODO: maybe create the window when rendering first? we could then even * get the initial geometry right */ uint32_t mask = 0; uint32_t values[2]; /* our own frames should not be managed */ mask |= XCB_CW_OVERRIDE_REDIRECT; values[0] = 1; /* We want to know when… */ mask |= XCB_CW_EVENT_MASK; values[1] = FRAME_EVENT_MASK; Rect dims = { -15, -15, 10, 10 }; con->frame = create_window(conn, dims, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values); con->gc = xcb_generate_id(conn); xcb_create_gc(conn, con->gc, con->frame, 0, 0); struct con_state *state = scalloc(sizeof(struct con_state)); state->id = con->frame; state->mapped = false; state->initial = true; CIRCLEQ_INSERT_HEAD(&state_head, state, state); CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state); DLOG("adding new state for window id 0x%08x\n", state->id); } /* * Re-initializes the associated X window state for this container. You have * to call this when you assign a client to an empty container to ensure that * its state gets updated correctly. * */ void x_reinit(Con *con) { struct con_state *state; if ((state = state_for_frame(con->frame)) == NULL) { ELOG("window state not found\n"); return; } DLOG("resetting state %p to initial\n", state); state->initial = true; state->child_mapped = false; memset(&(state->window_rect), 0, sizeof(Rect)); } /* * Reparents the child window of the given container (necessary for sticky * containers). The reparenting happens in the next call of x_push_changes(). * */ void x_reparent_child(Con *con, Con *old) { struct con_state *state; if ((state = state_for_frame(con->frame)) == NULL) { ELOG("window state for con not found\n"); return; } state->need_reparent = true; state->old_frame = old->frame; } /* * Moves a child window from Container src to Container dest. * */ void x_move_win(Con *src, Con *dest) { struct con_state *state_src, *state_dest; if ((state_src = state_for_frame(src->frame)) == NULL) { ELOG("window state for src not found\n"); return; } if ((state_dest = state_for_frame(dest->frame)) == NULL) { ELOG("window state for dest not found\n"); return; } Rect zero = { 0, 0, 0, 0 }; if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) { memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect)); DLOG("COPYING RECT\n"); } } /* * Kills the window decoration associated with the given container. * */ void x_con_kill(Con *con) { con_state *state; xcb_destroy_window(conn, con->frame); state = state_for_frame(con->frame); CIRCLEQ_REMOVE(&state_head, state, state); CIRCLEQ_REMOVE(&old_state_head, state, old_state); FREE(state->name); free(state); /* Invalidate focused_id to correctly focus new windows with the same ID */ focused_id = XCB_NONE; } /* * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW) * */ bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) { xcb_get_property_cookie_t cookie; xcb_icccm_get_wm_protocols_reply_t protocols; bool result = false; cookie = xcb_icccm_get_wm_protocols_unchecked(conn, window, A_WM_PROTOCOLS); if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1) return false; /* Check if the client’s protocols have the requested atom set */ for (uint32_t i = 0; i < protocols.atoms_len; i++) if (protocols.atoms[i] == atom) result = true; xcb_icccm_get_wm_protocols_reply_wipe(&protocols); return result; } /* * Kills the given X11 window using WM_DELETE_WINDOW (if supported). * */ void x_window_kill(xcb_window_t window) { /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */ if (!window_supports_protocol(window, A_WM_DELETE_WINDOW)) { LOG("Killing window the hard way\n"); xcb_kill_client(conn, window); return; } xcb_client_message_event_t ev; memset(&ev, 0, sizeof(xcb_client_message_event_t)); ev.response_type = XCB_CLIENT_MESSAGE; ev.window = window; ev.type = A_WM_PROTOCOLS; ev.format = 32; ev.data.data32[0] = A_WM_DELETE_WINDOW; ev.data.data32[1] = XCB_CURRENT_TIME; LOG("Sending WM_DELETE to the client\n"); xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)&ev); xcb_flush(conn); } /* * Draws the decoration of the given container onto its parent. * */ void x_draw_decoration(Con *con) { /* This code needs to run for: * • leaf containers * • non-leaf containers which are in a stacked/tabbed container * * It does not need to run for: * • floating containers (they don’t have a decoration) */ if ((!con_is_leaf(con) && con->parent->layout != L_STACKED && con->parent->layout != L_TABBED) || con->type == CT_FLOATING_CON) return; DLOG("decoration should be rendered for con %p\n", con); /* 1: find out which colors to use */ struct Colortriple *color; if (con->urgent) color = &config.client.urgent; else if (con == focused) color = &config.client.focused; else if (con == TAILQ_FIRST(&(con->parent->focus_head))) color = &config.client.focused_inactive; else color = &config.client.unfocused; Con *parent = con->parent; int border_style = con_border_style(con); /* 2: draw the client.background, but only for the parts around the client_rect */ Rect *r = &(con->rect); Rect *w = &(con->window_rect); xcb_rectangle_t background[] = { /* top area */ { 0, con->deco_rect.height, r->width, w->y }, /* bottom area */ { 0, (w->y + w->height), r->width, r->height - (w->y + w->height) }, /* right area */ { w->width, con->deco_rect.height, r->width - (w->x + w->width), r->height } }; #if 0 for (int i = 0; i < 3; i++) DLOG("rect is (%d, %d) with %d x %d\n", background[i].x, background[i].y, background[i].width, background[i].height ); #endif xcb_change_gc_single(conn, con->gc, XCB_GC_FOREGROUND, config.client.background); xcb_poly_fill_rectangle(conn, con->frame, con->gc, sizeof(background) / sizeof(xcb_rectangle_t), background); /* 3: draw a rectangle in border color around the client */ if (border_style != BS_NONE && con_is_leaf(con)) { Rect br = con_border_style_rect(con); #if 0 DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height); DLOG("border_rect spans (%d, %d) with %d x %d\n", br.x, br.y, br.width, br.height); DLOG("window_rect spans (%d, %d) with %d x %d\n", con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height); #endif /* These rectangles represents the border around the child window * (left, bottom and right part). We don’t just fill the whole * rectangle because some childs are not freely resizable and we want * their background color to "shine through". */ xcb_change_gc_single(conn, con->gc, XCB_GC_FOREGROUND, color->background); xcb_rectangle_t borders[] = { { 0, 0, br.x, r->height }, { 0, r->height + br.height + br.y, r->width, r->height }, { r->width + br.width + br.x, 0, r->width, r->height } }; xcb_poly_fill_rectangle(conn, con->frame, con->gc, 3, borders); /* 1pixel border needs an additional line at the top */ if (border_style == BS_1PIXEL) { xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y }; xcb_poly_fill_rectangle(conn, con->frame, con->gc, 1, &topline); } } /* if this is a borderless/1pixel window, we don’t * need to render the * decoration. */ if (border_style != BS_NORMAL) { DLOG("border style not BS_NORMAL, aborting rendering of decoration\n"); return; } /* 4: paint the bar */ xcb_change_gc_single(conn, parent->gc, XCB_GC_FOREGROUND, color->background); xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height }; xcb_poly_fill_rectangle(conn, parent->frame, parent->gc, 1, &drect); /* 5: draw the two lines in border color */ xcb_draw_line(conn, parent->frame, parent->gc, color->border, con->deco_rect.x, /* x */ con->deco_rect.y, /* y */ con->deco_rect.x + con->deco_rect.width, /* to_x */ con->deco_rect.y); /* to_y */ xcb_draw_line(conn, parent->frame, parent->gc, color->border, con->deco_rect.x, /* x */ con->deco_rect.y + con->deco_rect.height - 1, /* y */ con->deco_rect.x + con->deco_rect.width, /* to_x */ con->deco_rect.y + con->deco_rect.height - 1); /* to_y */ /* 6: draw the title */ uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT; uint32_t values[] = { color->text, color->background, config.font.id }; xcb_change_gc(conn, parent->gc, mask, values); int text_offset_y = config.font.height + (con->deco_rect.height - config.font.height) / 2 - 1; struct Window *win = con->window; if (win == NULL || win->name_x == NULL) { /* this is a non-leaf container, we need to make up a good description */ // TODO: use a good description instead of just "another container" xcb_image_text_8( conn, strlen("another container"), parent->frame, parent->gc, con->deco_rect.x + 2, con->deco_rect.y + text_offset_y, "another container" ); return; } int indent_level = 0, indent_mult = 0; Con *il_parent = con->parent; if (il_parent->layout != L_STACKED) { while (1) { DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout); if (il_parent->layout == L_STACKED) indent_level++; if (il_parent->type == CT_WORKSPACE || il_parent->type == CT_DOCKAREA || il_parent->type == CT_OUTPUT) break; il_parent = il_parent->parent; indent_mult++; } } DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult); int indent_px = (indent_level * 5) * indent_mult; if (win->uses_net_wm_name) xcb_image_text_16( conn, win->name_len, parent->frame, parent->gc, con->deco_rect.x + 2 + indent_px, con->deco_rect.y + text_offset_y, (xcb_char2b_t*)win->name_x ); else xcb_image_text_8( conn, win->name_len, parent->frame, parent->gc, con->deco_rect.x + 2 + indent_px, con->deco_rect.y + text_offset_y, win->name_x ); } /* * This function pushes the properties of each node of the layout tree to * X11 if they have changed (like the map state, position of the window, …). * It recursively traverses all children of the given node. * */ static void x_push_node(Con *con) { Con *current; con_state *state; Rect rect = con->rect; DLOG("Pushing changes for node %p / %s\n", con, con->name); state = state_for_frame(con->frame); if (state->name != NULL) { DLOG("pushing name %s for con %p\n", state->name, con); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame, A_WM_NAME, A_STRING, 8, strlen(state->name), state->name); FREE(state->name); } if (con->window == NULL) { /* Calculate the height of all window decorations which will be drawn on to * this frame. */ uint32_t max_y = 0, max_height = 0; TAILQ_FOREACH(current, &(con->nodes_head), nodes) { Rect *dr = &(current->deco_rect); if (dr->y >= max_y && dr->height >= max_height) { max_y = dr->y; max_height = dr->height; } } rect.height = max_y + max_height; if (rect.height == 0) { DLOG("Unmapping container because it does not contain anything atm.\n"); con->mapped = false; } } /* reparent the child window (when the window was moved due to a sticky * container) */ if (state->need_reparent && con->window != NULL) { DLOG("Reparenting child window\n"); /* Temporarily set the event masks to XCB_NONE so that we won’t get * UnmapNotify events (otherwise the handler would close the container). * These events are generated automatically when reparenting. */ uint32_t values[] = { XCB_NONE }; xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values); xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values); xcb_reparent_window(conn, con->window->id, con->frame, 0, 0); values[0] = FRAME_EVENT_MASK; xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values); values[0] = CHILD_EVENT_MASK; xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values); state->old_frame = XCB_NONE; state->need_reparent = false; con->ignore_unmap++; DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n", con, con->window->id, con->ignore_unmap); } bool fake_notify = false; /* set new position if rect changed */ if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0) { DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height); xcb_set_window_rect(conn, con->frame, rect); memcpy(&(state->rect), &rect, sizeof(Rect)); fake_notify = true; } /* dito, but for child windows */ if (con->window != NULL && memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) { DLOG("setting window rect (%d, %d, %d, %d)\n", con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height); xcb_set_window_rect(conn, con->window->id, con->window_rect); memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect)); fake_notify = true; } /* Map if map state changed, also ensure that the child window * is changed if we are mapped *and* in initial state (meaning the * container was empty before, but now got a child). Unmaps are handled in * x_push_node_unmaps(). */ if ((state->mapped != con->mapped || (con->mapped && state->initial)) && con->mapped) { xcb_void_cookie_t cookie; if (con->window != NULL) { /* Set WM_STATE_NORMAL because GTK applications don’t want to * drag & drop if we don’t. Also, xprop(1) needs it. */ long data[] = { XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE }; xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id, A_WM_STATE, A_WM_STATE, 32, 2, data); } if (!state->child_mapped && con->window != NULL) { cookie = xcb_map_window(conn, con->window->id); DLOG("mapping child window (serial %d)\n", cookie.sequence); /* Ignore enter_notifies which are generated when mapping */ add_ignore_event(cookie.sequence); state->child_mapped = true; } cookie = xcb_map_window(conn, con->frame); DLOG("mapping container (serial %d)\n", cookie.sequence); /* Ignore enter_notifies which are generated when mapping */ add_ignore_event(cookie.sequence); state->mapped = con->mapped; } if (fake_notify) { DLOG("Sending fake configure notify\n"); fake_absolute_configure_notify(con); } /* handle all children and floating windows of this node */ TAILQ_FOREACH(current, &(con->nodes_head), nodes) x_push_node(current); TAILQ_FOREACH(current, &(con->floating_head), floating_windows) x_push_node(current); if (con->type != CT_ROOT && con->type != CT_OUTPUT) x_draw_decoration(con); } /* * Same idea as in x_push_node(), but this function only unmaps windows. It is * necessary to split this up to handle new fullscreen clients properly: The * new window needs to be mapped and focus needs to be set *before* the * underlying windows are unmapped. Otherwise, focus will revert to the * PointerRoot and will then be set to the new window, generating unnecessary * FocusIn/FocusOut events. * */ static void x_push_node_unmaps(Con *con) { Con *current; con_state *state; DLOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name); state = state_for_frame(con->frame); /* map/unmap if map state changed, also ensure that the child window * is changed if we are mapped *and* in initial state (meaning the * container was empty before, but now got a child) */ if ((state->mapped != con->mapped || (con->mapped && state->initial)) && !con->mapped) { xcb_void_cookie_t cookie; if (con->window != NULL) { /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */ long data[] = { XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE }; xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id, A_WM_STATE, A_WM_STATE, 32, 2, data); } cookie = xcb_unmap_window(conn, con->frame); DLOG("unmapping container (serial %d)\n", cookie.sequence); /* we need to increase ignore_unmap for this container (if it * contains a window) and for every window "under" this one which * contains a window */ if (con->window != NULL) { con->ignore_unmap++; DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap); } /* Ignore enter_notifies which are generated when unmapping */ add_ignore_event(cookie.sequence); state->mapped = con->mapped; } /* handle all children and floating windows of this node */ TAILQ_FOREACH(current, &(con->nodes_head), nodes) x_push_node_unmaps(current); TAILQ_FOREACH(current, &(con->floating_head), floating_windows) x_push_node_unmaps(current); } /* * Pushes all changes (state of each node, see x_push_node() and the window * stack) to X11. * * NOTE: We need to push the stack first so that the windows have the correct * stacking order. This is relevant for workspace switching where we map the * windows because mapping may generate EnterNotify events. When they are * generated in the wrong order, this will cause focus problems when switching * workspaces. * */ void x_push_changes(Con *con) { con_state *state; DLOG("-- PUSHING WINDOW STACK --\n"); DLOG("Disabling EnterNotify\n"); uint32_t values[1] = { XCB_NONE }; CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) { xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } DLOG("Done, EnterNotify disabled\n"); bool order_changed = false; /* X11 correctly represents the stack if we push it from bottom to top */ CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) { DLOG("stack: 0x%08x\n", state->id); con_state *prev = CIRCLEQ_PREV(state, state); con_state *old_prev = CIRCLEQ_PREV(state, old_state); if (prev != old_prev) order_changed = true; if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) { DLOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id); uint32_t mask = 0; mask |= XCB_CONFIG_WINDOW_SIBLING; mask |= XCB_CONFIG_WINDOW_STACK_MODE; uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE}; xcb_configure_window(conn, prev->id, mask, values); } state->initial = false; } DLOG("Re-enabling EnterNotify\n"); values[0] = FRAME_EVENT_MASK; CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) { xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } DLOG("Done, EnterNotify re-enabled\n"); DLOG("\n\n PUSHING CHANGES\n\n"); x_push_node(con); xcb_window_t to_focus = focused->frame; if (focused->window != NULL) to_focus = focused->window->id; DLOG("focused_id = 0x%08x, to_focus = 0x%08x\n", focused_id, to_focus); if (focused_id != to_focus) { if (!focused->mapped) { DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name); } else { DLOG("Updating focus (focused: %p / %s)\n", focused, focused->name); xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME); if (focused->window != NULL && focused->window->needs_take_focus) { send_take_focus(to_focus); } ewmh_update_active_window(to_focus); focused_id = to_focus; } } xcb_flush(conn); DLOG("\n\n ENDING CHANGES\n\n"); x_push_node_unmaps(con); /* save the current stack as old stack */ CIRCLEQ_FOREACH(state, &state_head, state) { CIRCLEQ_REMOVE(&old_state_head, state, old_state); CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state); } CIRCLEQ_FOREACH(state, &old_state_head, old_state) { DLOG("old stack: 0x%08x\n", state->id); } } /* * Raises the specified container in the internal stack of X windows. The * next call to x_push_changes() will make the change visible in X11. * */ void x_raise_con(Con *con) { con_state *state; state = state_for_frame(con->frame); DLOG("raising in new stack: %p / %s / %s / xid %08x\n", con, con->name, con->window ? con->window->name_json : "", state->id); CIRCLEQ_REMOVE(&state_head, state, state); CIRCLEQ_INSERT_HEAD(&state_head, state, state); } /* * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways) * of the given name. Used for properly tagging the windows for easily spotting * i3 windows in xwininfo -root -all. * */ void x_set_name(Con *con, const char *name) { struct con_state *state; if ((state = state_for_frame(con->frame)) == NULL) { ELOG("window state not found\n"); return; } FREE(state->name); state->name = sstrdup(name); }