/* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager * © 2009 Michael Stapelberg and contributors (see also: LICENSE) * * x.c: Interface to X11, transfers our in-memory state to X11 (see also * render.c). Basically a big state machine. * */ #include "all.h" #ifndef MAX #define MAX(x, y) ((x) > (y) ? (x) : (y)) #endif /* Stores the X11 window ID of the currently focused window */ xcb_window_t focused_id = XCB_NONE; /* Because 'focused_id' might be reset to force input focus, we separately keep * track of the X11 window ID to be able to always tell whether the focused * window actually changed. */ static xcb_window_t last_focused = XCB_NONE; /* Stores coordinates to warp mouse pointer to if set */ static Rect *warp_to; /* * 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 unmap_now; bool child_mapped; bool is_hidden; /* The con for which this state is. */ Con *con; /* 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; /* The container was child of floating container during the previous call of * x_push_node(). This is used to remove the shape when the container is no * longer floating. */ bool was_floating; Rect rect; Rect window_rect; bool initial; char *name; CIRCLEQ_ENTRY(con_state) state; CIRCLEQ_ENTRY(con_state) old_state; TAILQ_ENTRY(con_state) initial_mapping_order; } 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); TAILQ_HEAD(initial_mapping_head, con_state) initial_mapping_head = TAILQ_HEAD_INITIALIZER(initial_mapping_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 for window 0x%08x\n", window); assert(false); return NULL; } /* * Changes the atoms on the root window and the windows themselves to properly * reflect the current focus for ewmh compliance. * */ static void change_ewmh_focus(xcb_window_t new_focus, xcb_window_t old_focus) { if (new_focus == old_focus) { return; } ewmh_update_active_window(new_focus); if (new_focus != XCB_WINDOW_NONE) { ewmh_update_focused(new_focus, true); } if (old_focus != XCB_WINDOW_NONE) { ewmh_update_focused(old_focus, false); } } /* * 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[5]; xcb_visualid_t visual = get_visualid_by_depth(con->depth); xcb_colormap_t win_colormap; if (con->depth != root_depth) { /* We need to create a custom colormap. */ win_colormap = xcb_generate_id(conn); xcb_create_colormap(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual); con->colormap = win_colormap; } else { /* Use the default colormap. */ win_colormap = colormap; con->colormap = XCB_NONE; } /* We explicitly set a background color and border color (even though we * don’t even have a border) because the X11 server requires us to when * using 32 bit color depths, see * https://stackoverflow.com/questions/3645632 */ mask |= XCB_CW_BACK_PIXEL; values[0] = root_screen->black_pixel; mask |= XCB_CW_BORDER_PIXEL; values[1] = root_screen->black_pixel; /* our own frames should not be managed */ mask |= XCB_CW_OVERRIDE_REDIRECT; values[2] = 1; /* see include/xcb.h for the FRAME_EVENT_MASK */ mask |= XCB_CW_EVENT_MASK; values[3] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW; mask |= XCB_CW_COLORMAP; values[4] = win_colormap; Rect dims = {-15, -15, 10, 10}; xcb_window_t frame_id = create_window(conn, dims, con->depth, visual, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values); draw_util_surface_init(conn, &(con->frame), frame_id, get_visualtype_by_id(visual), dims.width, dims.height); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame.id, XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 8, (strlen("i3-frame") + 1) * 2, "i3-frame\0i3-frame\0"); struct con_state *state = scalloc(1, sizeof(struct con_state)); state->id = con->frame.id; state->mapped = false; state->initial = true; DLOG("Adding window 0x%08x to lists\n", state->id); CIRCLEQ_INSERT_HEAD(&state_head, state, state); CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state); TAILQ_INSERT_TAIL(&initial_mapping_head, state, initial_mapping_order); 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.id)) == NULL) { ELOG("window state not found\n"); return; } DLOG("resetting state %p to initial\n", state); state->initial = true; state->child_mapped = false; state->con = con; 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.id)) == NULL) { ELOG("window state for con not found\n"); return; } state->need_reparent = true; state->old_frame = old->frame.id; } /* * 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.id)) == NULL) { ELOG("window state for src not found\n"); return; } if ((state_dest = state_for_frame(dest->frame.id)) == NULL) { ELOG("window state for dest not found\n"); return; } state_dest->con = state_src->con; state_src->con = NULL; if (rect_equals(state_dest->window_rect, (Rect){0, 0, 0, 0})) { memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect)); DLOG("COPYING RECT\n"); } } static void _x_con_kill(Con *con) { con_state *state; if (con->colormap != XCB_NONE) { xcb_free_colormap(conn, con->colormap); } draw_util_surface_free(conn, &(con->frame)); draw_util_surface_free(conn, &(con->frame_buffer)); xcb_free_pixmap(conn, con->frame_buffer.id); con->frame_buffer.id = XCB_NONE; state = state_for_frame(con->frame.id); CIRCLEQ_REMOVE(&state_head, state, state); CIRCLEQ_REMOVE(&old_state_head, state, old_state); TAILQ_REMOVE(&initial_mapping_head, state, initial_mapping_order); FREE(state->name); free(state); /* Invalidate focused_id to correctly focus new windows with the same ID */ if (con->frame.id == focused_id) { focused_id = XCB_NONE; } if (con->frame.id == last_focused) { last_focused = XCB_NONE; } } /* * Kills the window decoration associated with the given container. * */ void x_con_kill(Con *con) { _x_con_kill(con); xcb_destroy_window(conn, con->frame.id); } /* * Completely reinitializes the container's frame, without destroying the old window. * */ void x_con_reframe(Con *con) { _x_con_kill(con); x_con_init(con); } /* * 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(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, kill_window_t kill_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)) { if (kill_window == KILL_WINDOW) { LOG("Killing specific window 0x%08x\n", window); xcb_destroy_window(conn, window); } else { LOG("Killing the X11 client which owns window 0x%08x\n", window); xcb_kill_client(conn, window); } return; } /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes. * In order to properly initialize these bytes, we allocate 32 bytes even * though we only need less for an xcb_configure_notify_event_t */ void *event = scalloc(32, 1); xcb_client_message_event_t *ev = event; 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); free(event); } static void x_draw_title_border(Con *con, struct deco_render_params *p) { assert(con->parent != NULL); Rect *dr = &(con->deco_rect); /* Left */ draw_util_rectangle(&(con->parent->frame_buffer), p->color->border, dr->x, dr->y, 1, dr->height); /* Right */ draw_util_rectangle(&(con->parent->frame_buffer), p->color->border, dr->x + dr->width - 1, dr->y, 1, dr->height); /* Top */ draw_util_rectangle(&(con->parent->frame_buffer), p->color->border, dr->x, dr->y, dr->width, 1); /* Bottom */ draw_util_rectangle(&(con->parent->frame_buffer), p->color->border, dr->x, dr->y + dr->height - 1, dr->width, 1); } static void x_draw_decoration_after_title(Con *con, struct deco_render_params *p) { assert(con->parent != NULL); Rect *dr = &(con->deco_rect); /* Redraw the right border to cut off any text that went past it. * This is necessary when the text was drawn using XCB since cutting text off * automatically does not work there. For pango rendering, this isn't necessary. */ if (!font_is_pango()) { /* We actually only redraw the far right two pixels as that is the * distance we keep from the edge (not the entire border width). * Redrawing the entire border would cause text to be cut off. */ draw_util_rectangle(&(con->parent->frame_buffer), p->color->background, dr->x + dr->width - 2 * logical_px(1), dr->y, 2 * logical_px(1), dr->height); } /* Redraw the border. */ x_draw_title_border(con, p); } /* * Get rectangles representing the border around the child window. Some borders * are adjacent to the screen-edge and thus not returned. Return value is the * number of rectangles. * */ static size_t x_get_border_rectangles(Con *con, xcb_rectangle_t rectangles[4]) { size_t count = 0; int border_style = con_border_style(con); if (border_style != BS_NONE && con_is_leaf(con)) { adjacent_t borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders; Rect br = con_border_style_rect(con); if (!(borders_to_hide & ADJ_LEFT_SCREEN_EDGE)) { rectangles[count++] = (xcb_rectangle_t){ .x = 0, .y = 0, .width = br.x, .height = con->rect.height, }; } if (!(borders_to_hide & ADJ_RIGHT_SCREEN_EDGE)) { rectangles[count++] = (xcb_rectangle_t){ .x = con->rect.width + (br.width + br.x), .y = 0, .width = -(br.width + br.x), .height = con->rect.height, }; } if (!(borders_to_hide & ADJ_LOWER_SCREEN_EDGE)) { rectangles[count++] = (xcb_rectangle_t){ .x = br.x, .y = con->rect.height + (br.height + br.y), .width = con->rect.width + br.width, .height = -(br.height + br.y), }; } /* pixel border have an additional line at the top */ if (border_style == BS_PIXEL && !(borders_to_hide & ADJ_UPPER_SCREEN_EDGE)) { rectangles[count++] = (xcb_rectangle_t){ .x = br.x, .y = 0, .width = con->rect.width + br.width, .height = br.y, }; } } return count; } /* * Draws the decoration of the given container onto its parent. * */ void x_draw_decoration(Con *con) { Con *parent = con->parent; bool leaf = con_is_leaf(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: * • direct children of outputs or dockareas * • floating containers (they don’t have a decoration) */ if ((!leaf && parent->layout != L_STACKED && parent->layout != L_TABBED) || parent->type == CT_OUTPUT || parent->type == CT_DOCKAREA || con->type == CT_FLOATING_CON) return; /* Skip containers whose height is 0 (for example empty dockareas) */ if (con->rect.height == 0) return; /* Skip containers whose pixmap has not yet been created (can happen when * decoration rendering happens recursively for a window for which * x_push_node() was not yet called) */ if (leaf && con->frame_buffer.id == XCB_NONE) return; /* 1: build deco_params and compare with cache */ struct deco_render_params *p = scalloc(1, sizeof(struct deco_render_params)); /* find out which colors to use */ if (con->urgent) p->color = &config.client.urgent; else if (con == focused || con_inside_focused(con)) p->color = &config.client.focused; else if (con == TAILQ_FIRST(&(parent->focus_head))) p->color = &config.client.focused_inactive; else p->color = &config.client.unfocused; p->border_style = con_border_style(con); Rect *r = &(con->rect); Rect *w = &(con->window_rect); p->con_rect = (struct width_height){r->width, r->height}; p->con_window_rect = (struct width_height){w->width, w->height}; p->con_deco_rect = con->deco_rect; p->background = config.client.background; p->con_is_leaf = con_is_leaf(con); p->parent_layout = con->parent->layout; if (con->deco_render_params != NULL && (con->window == NULL || !con->window->name_x_changed) && !parent->pixmap_recreated && !con->pixmap_recreated && !con->mark_changed && memcmp(p, con->deco_render_params, sizeof(struct deco_render_params)) == 0) { free(p); goto copy_pixmaps; } Con *next = con; while ((next = TAILQ_NEXT(next, nodes))) { FREE(next->deco_render_params); } FREE(con->deco_render_params); con->deco_render_params = p; if (con->window != NULL && con->window->name_x_changed) con->window->name_x_changed = false; parent->pixmap_recreated = false; con->pixmap_recreated = false; con->mark_changed = false; /* 2: draw the client.background, but only for the parts around the window_rect */ if (con->window != NULL) { /* top area */ draw_util_rectangle(&(con->frame_buffer), config.client.background, 0, 0, r->width, w->y); /* bottom area */ draw_util_rectangle(&(con->frame_buffer), config.client.background, 0, w->y + w->height, r->width, r->height - (w->y + w->height)); /* left area */ draw_util_rectangle(&(con->frame_buffer), config.client.background, 0, 0, w->x, r->height); /* right area */ draw_util_rectangle(&(con->frame_buffer), config.client.background, w->x + w->width, 0, r->width - (w->x + w->width), r->height); } /* 3: draw a rectangle in border color around the client */ if (p->border_style != BS_NONE && p->con_is_leaf) { /* Fill the border. We don’t just fill the whole rectangle because some * children are not freely resizable and we want their background color * to "shine through". */ xcb_rectangle_t rectangles[4]; size_t rectangles_count = x_get_border_rectangles(con, rectangles); for (size_t i = 0; i < rectangles_count; i++) { draw_util_rectangle(&(con->frame_buffer), p->color->child_border, rectangles[i].x, rectangles[i].y, rectangles[i].width, rectangles[i].height); } /* Highlight the side of the border at which the next window will be * opened if we are rendering a single window within a split container * (which is undistinguishable from a single window outside a split * container otherwise. */ Rect br = con_border_style_rect(con); if (TAILQ_NEXT(con, nodes) == NULL && TAILQ_PREV(con, nodes_head, nodes) == NULL && con->parent->type != CT_FLOATING_CON) { if (p->parent_layout == L_SPLITH) { draw_util_rectangle(&(con->frame_buffer), p->color->indicator, r->width + (br.width + br.x), br.y, -(br.width + br.x), r->height + br.height); } else if (p->parent_layout == L_SPLITV) { draw_util_rectangle(&(con->frame_buffer), p->color->indicator, br.x, r->height + (br.height + br.y), r->width + br.width, -(br.height + br.y)); } } } /* if this is a borderless/1pixel window, we don’t need to render the * decoration. */ if (p->border_style != BS_NORMAL) goto copy_pixmaps; /* If the parent hasn't been set up yet, skip the decoration rendering * for now. */ if (parent->frame_buffer.id == XCB_NONE) goto copy_pixmaps; /* For the first child, we clear the parent pixmap to ensure there's no * garbage left on there. This is important to avoid tearing when using * transparency. */ if (con == TAILQ_FIRST(&(con->parent->nodes_head))) { draw_util_clear_surface(&(con->parent->frame_buffer), COLOR_TRANSPARENT); FREE(con->parent->deco_render_params); } /* 4: paint the bar */ draw_util_rectangle(&(parent->frame_buffer), p->color->background, con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height); /* 5: draw title border */ x_draw_title_border(con, p); /* 6: draw the title */ int text_offset_y = (con->deco_rect.height - config.font.height) / 2; const int title_padding = logical_px(2); const int deco_width = (int)con->deco_rect.width; int mark_width = 0; if (config.show_marks && !TAILQ_EMPTY(&(con->marks_head))) { char *formatted_mark = sstrdup(""); bool had_visible_mark = false; mark_t *mark; TAILQ_FOREACH (mark, &(con->marks_head), marks) { if (mark->name[0] == '_') continue; had_visible_mark = true; char *buf; sasprintf(&buf, "%s[%s]", formatted_mark, mark->name); free(formatted_mark); formatted_mark = buf; } if (had_visible_mark) { i3String *mark = i3string_from_utf8(formatted_mark); mark_width = predict_text_width(mark); int mark_offset_x = (config.title_align == ALIGN_RIGHT) ? title_padding : deco_width - mark_width - title_padding; draw_util_text(mark, &(parent->frame_buffer), p->color->text, p->color->background, con->deco_rect.x + mark_offset_x, con->deco_rect.y + text_offset_y, mark_width); I3STRING_FREE(mark); mark_width += title_padding; } FREE(formatted_mark); } i3String *title = NULL; struct Window *win = con->window; if (win == NULL) { if (con->title_format == NULL) { char *_title; char *tree = con_get_tree_representation(con); sasprintf(&_title, "i3: %s", tree); free(tree); title = i3string_from_utf8(_title); FREE(_title); } else { title = con_parse_title_format(con); } } else { title = con->title_format == NULL ? win->name : con_parse_title_format(con); } if (title == NULL) { goto copy_pixmaps; } int title_offset_x; switch (config.title_align) { case ALIGN_LEFT: /* (pad)[text ](pad)[mark + its pad) */ title_offset_x = title_padding; break; case ALIGN_CENTER: /* (pad)[ text ](pad)[mark + its pad) * To center the text inside its allocated space, the surface * between the brackets, we use the formula * (surface_width - predict_text_width) / 2 * where surface_width = deco_width - 2 * pad - mark_width * so, offset = pad + (surface_width - predict_text_width) / 2 = * = … = (deco_width - mark_width - predict_text_width) / 2 */ title_offset_x = max(title_padding, (deco_width - mark_width - predict_text_width(title)) / 2); break; case ALIGN_RIGHT: /* [mark + its pad](pad)[ text](pad) */ title_offset_x = max(title_padding + mark_width, deco_width - title_padding - predict_text_width(title)); break; } draw_util_text(title, &(parent->frame_buffer), p->color->text, p->color->background, con->deco_rect.x + title_offset_x, con->deco_rect.y + text_offset_y, deco_width - mark_width - 2 * title_padding); if (win == NULL || con->title_format != NULL) { I3STRING_FREE(title); } x_draw_decoration_after_title(con, p); copy_pixmaps: draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height); } /* * Recursively calls x_draw_decoration. This cannot be done in x_push_node * because x_push_node uses focus order to recurse (see the comment above) * while drawing the decoration needs to happen in the actual order. * */ void x_deco_recurse(Con *con) { Con *current; bool leaf = TAILQ_EMPTY(&(con->nodes_head)) && TAILQ_EMPTY(&(con->floating_head)); con_state *state = state_for_frame(con->frame.id); if (!leaf) { TAILQ_FOREACH (current, &(con->nodes_head), nodes) { x_deco_recurse(current); } TAILQ_FOREACH (current, &(con->floating_head), floating_windows) { x_deco_recurse(current); } if (state->mapped) { draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height); } } if ((con->type != CT_ROOT && con->type != CT_OUTPUT) && (!leaf || con->mapped)) x_draw_decoration(con); } /* * Sets or removes the _NET_WM_STATE_HIDDEN property on con if necessary. * */ static void set_hidden_state(Con *con) { if (con->window == NULL) { return; } con_state *state = state_for_frame(con->frame.id); bool should_be_hidden = con_is_hidden(con); if (should_be_hidden == state->is_hidden) return; if (should_be_hidden) { DLOG("setting _NET_WM_STATE_HIDDEN for con = %p\n", con); xcb_add_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN); } else { DLOG("removing _NET_WM_STATE_HIDDEN for con = %p\n", con); xcb_remove_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN); } state->is_hidden = should_be_hidden; } /* * Set the container frame shape as the union of the window shape and the * shape of the frame borders. */ static void x_shape_frame(Con *con, xcb_shape_sk_t shape_kind) { assert(con->window); xcb_shape_combine(conn, XCB_SHAPE_SO_SET, shape_kind, shape_kind, con->frame.id, con->window_rect.x + con->border_width, con->window_rect.y + con->border_width, con->window->id); xcb_rectangle_t rectangles[4]; size_t rectangles_count = x_get_border_rectangles(con, rectangles); if (rectangles_count) { xcb_shape_rectangles(conn, XCB_SHAPE_SO_UNION, shape_kind, XCB_CLIP_ORDERING_UNSORTED, con->frame.id, 0, 0, rectangles_count, rectangles); } } /* * Reset the container frame shape. */ static void x_unshape_frame(Con *con, xcb_shape_sk_t shape_kind) { assert(con->window); xcb_shape_mask(conn, XCB_SHAPE_SO_SET, shape_kind, con->frame.id, 0, 0, XCB_PIXMAP_NONE); } /* * Shape or unshape container frame based on the con state. */ static void set_shape_state(Con *con, bool need_reshape) { if (!shape_supported || con->window == NULL) { return; } struct con_state *state; if ((state = state_for_frame(con->frame.id)) == NULL) { ELOG("window state for con %p not found\n", con); return; } if (need_reshape && con_is_floating(con)) { /* We need to reshape the window frame only if it already has shape. */ if (con->window->shaped) { x_shape_frame(con, XCB_SHAPE_SK_BOUNDING); } if (con->window->input_shaped) { x_shape_frame(con, XCB_SHAPE_SK_INPUT); } } if (state->was_floating && !con_is_floating(con)) { /* Remove the shape when container is no longer floating. */ if (con->window->shaped) { x_unshape_frame(con, XCB_SHAPE_SK_BOUNDING); } if (con->window->input_shaped) { x_unshape_frame(con, XCB_SHAPE_SK_INPUT); } } } /* * 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. * */ 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.id); 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.id, XCB_ATOM_WM_NAME, XCB_ATOM_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) con->mapped = false; } bool need_reshape = 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.id, 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); need_reshape = true; } /* We need to update shape when window frame dimensions is updated. */ need_reshape |= state->rect.width != rect.width || state->rect.height != rect.height || state->window_rect.width != con->window_rect.width || state->window_rect.height != con->window_rect.height; /* We need to set shape when container becomes floating. */ need_reshape |= con_is_floating(con) && !state->was_floating; /* The pixmap of a borderless leaf container will not be used except * for the titlebar in a stack or tabs (issue #1013). */ bool is_pixmap_needed = (con->border_style != BS_NONE || !con_is_leaf(con) || con->parent->layout == L_STACKED || con->parent->layout == L_TABBED); /* The root con and output cons will never require a pixmap. In particular for the * __i3 output, this will likely not work anyway because it might be ridiculously * large, causing an XCB_ALLOC error. */ if (con->type == CT_ROOT || con->type == CT_OUTPUT) is_pixmap_needed = false; bool fake_notify = false; /* Set new position if rect changed (and if height > 0) or if the pixmap * needs to be recreated */ if ((is_pixmap_needed && con->frame_buffer.id == XCB_NONE) || (!rect_equals(state->rect, rect) && rect.height > 0)) { /* We first create the new pixmap, then render to it, set it as the * background and only afterwards change the window size. This reduces * flickering. */ bool has_rect_changed = (state->rect.x != rect.x || state->rect.y != rect.y || state->rect.width != rect.width || state->rect.height != rect.height); /* Check if the container has an unneeded pixmap left over from * previously having a border or titlebar. */ if (!is_pixmap_needed && con->frame_buffer.id != XCB_NONE) { draw_util_surface_free(conn, &(con->frame_buffer)); xcb_free_pixmap(conn, con->frame_buffer.id); con->frame_buffer.id = XCB_NONE; } if (is_pixmap_needed && (has_rect_changed || con->frame_buffer.id == XCB_NONE)) { if (con->frame_buffer.id == XCB_NONE) { con->frame_buffer.id = xcb_generate_id(conn); } else { draw_util_surface_free(conn, &(con->frame_buffer)); xcb_free_pixmap(conn, con->frame_buffer.id); } uint16_t win_depth = root_depth; if (con->window) win_depth = con->window->depth; /* Ensure we have valid dimensions for our surface. */ // TODO This is probably a bug in the condition above as we should never enter this path // for height == 0. Also, we should probably handle width == 0 the same way. int width = MAX((int32_t)rect.width, 1); int height = MAX((int32_t)rect.height, 1); xcb_create_pixmap(conn, win_depth, con->frame_buffer.id, con->frame.id, width, height); draw_util_surface_init(conn, &(con->frame_buffer), con->frame_buffer.id, get_visualtype_by_id(get_visualid_by_depth(win_depth)), width, height); /* For the graphics context, we disable GraphicsExposure events. * Those will be sent when a CopyArea request cannot be fulfilled * properly due to parts of the source being unmapped or otherwise * unavailable. Since we always copy from pixmaps to windows, this * is not a concern for us. */ xcb_change_gc(conn, con->frame_buffer.gc, XCB_GC_GRAPHICS_EXPOSURES, (uint32_t[]){0}); draw_util_surface_set_size(&(con->frame), width, height); con->pixmap_recreated = true; /* Don’t render the decoration for windows inside a stack which are * not visible right now */ // TODO Should this work the same way for L_TABBED? if (!con->parent || con->parent->layout != L_STACKED || TAILQ_FIRST(&(con->parent->focus_head)) == con) /* Render the decoration now to make the correct decoration visible * from the very first moment. Later calls will be cached, so this * doesn’t hurt performance. */ x_deco_recurse(con); } DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height); /* flush to ensure that the following commands are sent in a single * buffer and will be processed directly afterwards (the contents of a * window get lost when resizing it, therefore we want to provide it as * fast as possible) */ xcb_flush(conn); xcb_set_window_rect(conn, con->frame.id, rect); if (con->frame_buffer.id != XCB_NONE) { draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height); } xcb_flush(conn); memcpy(&(state->rect), &rect, sizeof(Rect)); fake_notify = true; } /* dito, but for child windows */ if (con->window != NULL && !rect_equals(state->window_rect, con->window_rect)) { 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; } set_shape_state(con, need_reshape); /* Map if map state changed, also ensure that the child window * is changed if we are mapped and there is a new, unmapped child window. * Unmaps are handled in x_push_node_unmaps(). */ if ((state->mapped != con->mapped || (con->window != NULL && !state->child_mapped)) && 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); } uint32_t values[1]; if (!state->child_mapped && con->window != NULL) { cookie = xcb_map_window(conn, con->window->id); /* We are interested in EnterNotifys as soon as the window is * mapped */ values[0] = CHILD_EVENT_MASK; xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values); DLOG("mapping child window (serial %d)\n", cookie.sequence); state->child_mapped = true; } cookie = xcb_map_window(conn, con->frame.id); values[0] = FRAME_EVENT_MASK; xcb_change_window_attributes(conn, con->frame.id, XCB_CW_EVENT_MASK, values); /* copy the pixmap contents to the frame window immediately after mapping */ if (con->frame_buffer.id != XCB_NONE) { draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height); } xcb_flush(conn); DLOG("mapping container %08x (serial %d)\n", con->frame.id, cookie.sequence); state->mapped = con->mapped; } state->unmap_now = (state->mapped != con->mapped) && !con->mapped; state->was_floating = con_is_floating(con); if (fake_notify) { DLOG("Sending fake configure notify\n"); fake_absolute_configure_notify(con); } set_hidden_state(con); /* Handle all children and floating windows of this node. We recurse * in focus order to display the focused client in a stack first when * switching workspaces (reduces flickering). */ TAILQ_FOREACH (current, &(con->focus_head), focused) { x_push_node(current); } } /* * 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.id); /* 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->unmap_now) { 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.id); DLOG("unmapping container %p / %s (serial %d)\n", con, con->name, 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.id, con->ignore_unmap); } 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); } } /* * Returns true if the given container is currently attached to its parent. * * TODO: Remove once #1185 has been fixed */ static bool is_con_attached(Con *con) { if (con->parent == NULL) return false; Con *current; TAILQ_FOREACH (current, &(con->parent->nodes_head), nodes) { if (current == con) return true; } return false; } /* * 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; xcb_query_pointer_cookie_t pointercookie; /* If we need to warp later, we request the pointer position as soon as possible */ if (warp_to) { pointercookie = xcb_query_pointer(conn, root); } DLOG("-- PUSHING WINDOW STACK --\n"); //DLOG("Disabling EnterNotify\n"); /* We need to keep SubstructureRedirect around, otherwise clients can send * ConfigureWindow requests and get them applied directly instead of having * them become ConfigureRequests that i3 handles. */ uint32_t values[1] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT}; CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (state->mapped) xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } //DLOG("Done, EnterNotify disabled\n"); bool order_changed = false; bool stacking_changed = false; /* count first, necessary to (re)allocate memory for the bottom-to-top * stack afterwards */ int cnt = 0; CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (con_has_managed_window(state->con)) { cnt++; } } /* The bottom-to-top window stack of all windows which are managed by i3. * Used for x_get_window_stack(). */ static xcb_window_t *client_list_windows = NULL; static int client_list_count = 0; if (cnt != client_list_count) { client_list_windows = srealloc(client_list_windows, sizeof(xcb_window_t) * cnt); client_list_count = cnt; } xcb_window_t *walk = client_list_windows; /* X11 correctly represents the stack if we push it from bottom to top */ CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (con_has_managed_window(state->con)) memcpy(walk++, &(state->con->window->id), sizeof(xcb_window_t)); //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)) { stacking_changed = true; //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; } /* If we re-stacked something (or a new window appeared), we need to update * the _NET_CLIENT_LIST and _NET_CLIENT_LIST_STACKING hints */ if (stacking_changed) { DLOG("Client list changed (%i clients)\n", cnt); ewmh_update_client_list_stacking(client_list_windows, client_list_count); walk = client_list_windows; /* reorder by initial mapping */ TAILQ_FOREACH (state, &initial_mapping_head, initial_mapping_order) { if (con_has_managed_window(state->con)) *walk++ = state->con->window->id; } ewmh_update_client_list(client_list_windows, client_list_count); } DLOG("PUSHING CHANGES\n"); x_push_node(con); if (warp_to) { xcb_query_pointer_reply_t *pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL); if (!pointerreply) { ELOG("Could not query pointer position, not warping pointer\n"); } else { int mid_x = warp_to->x + (warp_to->width / 2); int mid_y = warp_to->y + (warp_to->height / 2); Output *current = get_output_containing(pointerreply->root_x, pointerreply->root_y); Output *target = get_output_containing(mid_x, mid_y); if (current != target) { /* Ignore MotionNotify events generated by warping */ xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT}); xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y); xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK}); } free(pointerreply); } warp_to = NULL; } //DLOG("Re-enabling EnterNotify\n"); values[0] = FRAME_EVENT_MASK; CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (state->mapped) xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } //DLOG("Done, EnterNotify re-enabled\n"); x_deco_recurse(con); xcb_window_t to_focus = focused->frame.id; if (focused->window != NULL) to_focus = focused->window->id; if (focused_id != to_focus) { if (!focused->mapped) { DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name); /* Invalidate focused_id to correctly focus new windows with the same ID */ focused_id = XCB_NONE; } else { if (focused->window != NULL && focused->window->needs_take_focus && focused->window->doesnt_accept_focus) { DLOG("Updating focus by sending WM_TAKE_FOCUS to window 0x%08x (focused: %p / %s)\n", to_focus, focused, focused->name); send_take_focus(to_focus, last_timestamp); change_ewmh_focus((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE), last_focused); if (to_focus != last_focused && is_con_attached(focused)) ipc_send_window_event("focus", focused); } else { DLOG("Updating focus (focused: %p / %s) to X11 window 0x%08x\n", focused, focused->name, to_focus); /* We remove XCB_EVENT_MASK_FOCUS_CHANGE from the event mask to get * no focus change events for our own focus changes. We only want * these generated by the clients. */ if (focused->window != NULL) { values[0] = CHILD_EVENT_MASK & ~(XCB_EVENT_MASK_FOCUS_CHANGE); xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values); } xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, last_timestamp); if (focused->window != NULL) { values[0] = CHILD_EVENT_MASK; xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values); } change_ewmh_focus((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE), last_focused); if (to_focus != XCB_NONE && to_focus != last_focused && focused->window != NULL && is_con_attached(focused)) ipc_send_window_event("focus", focused); } focused_id = last_focused = to_focus; } } if (focused_id == XCB_NONE) { /* If we still have no window to focus, we focus the EWMH window instead. We use this rather than the * root window in order to avoid an X11 fallback mechanism causing a ghosting effect (see #1378). */ DLOG("Still no window focused, better set focus to the EWMH support window (%d)\n", ewmh_window); xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, ewmh_window, last_timestamp); change_ewmh_focus(XCB_WINDOW_NONE, last_focused); focused_id = ewmh_window; last_focused = XCB_NONE; } xcb_flush(conn); DLOG("ENDING CHANGES\n"); /* Disable EnterWindow events for windows which will be unmapped in * x_push_node_unmaps() now. Unmapping windows happens when switching * workspaces. We want to avoid getting EnterNotifies during that phase * because they would screw up our focus. One of these cases is having a * stack with two windows. If the first window is focused and gets * unmapped, the second one appears under the cursor and therefore gets an * EnterNotify event. */ values[0] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW; CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (!state->unmap_now) continue; xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } /* Push all pending unmaps */ 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); //} xcb_flush(conn); } /* * 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.id); //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.id)) == NULL) { ELOG("window state not found\n"); return; } FREE(state->name); state->name = sstrdup(name); } /* * Set up the I3_SHMLOG_PATH atom. * */ void update_shmlog_atom(void) { if (*shmlogname == '\0') { xcb_delete_property(conn, root, A_I3_SHMLOG_PATH); } else { xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SHMLOG_PATH, A_UTF8_STRING, 8, strlen(shmlogname), shmlogname); } } /* * Sets up i3 specific atoms (I3_SOCKET_PATH and I3_CONFIG_PATH) * */ void x_set_i3_atoms(void) { pid_t pid = getpid(); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SOCKET_PATH, A_UTF8_STRING, 8, (current_socketpath == NULL ? 0 : strlen(current_socketpath)), current_socketpath); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_PID, XCB_ATOM_CARDINAL, 32, 1, &pid); xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_CONFIG_PATH, A_UTF8_STRING, 8, strlen(current_configpath), current_configpath); update_shmlog_atom(); } /* * Set warp_to coordinates. This will trigger on the next call to * x_push_changes(). * */ void x_set_warp_to(Rect *rect) { if (config.mouse_warping != POINTER_WARPING_NONE) warp_to = rect; } /* * Applies the given mask to the event mask of every i3 window decoration X11 * window. This is useful to disable EnterNotify while resizing so that focus * is untouched. * */ void x_mask_event_mask(uint32_t mask) { uint32_t values[] = {FRAME_EVENT_MASK & mask}; con_state *state; CIRCLEQ_FOREACH_REVERSE (state, &state_head, state) { if (state->mapped) xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values); } } /* * Enables or disables nonrectangular shape of the container frame. */ void x_set_shape(Con *con, xcb_shape_sk_t kind, bool enable) { struct con_state *state; if ((state = state_for_frame(con->frame.id)) == NULL) { ELOG("window state for con %p not found\n", con); return; } switch (kind) { case XCB_SHAPE_SK_BOUNDING: con->window->shaped = enable; break; case XCB_SHAPE_SK_INPUT: con->window->input_shaped = enable; break; default: ELOG("Received unknown shape event kind for con %p. This is a bug.\n", con); return; } if (con_is_floating(con)) { if (enable) { x_shape_frame(con, kind); } else { x_unshape_frame(con, kind); } xcb_flush(conn); } }