#undef I3__FILE__ #define I3__FILE__ "randr.c" /* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE) * * For more information on RandR, please see the X.org RandR specification at * http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt * (take your time to read it completely, it answers all questions). * */ #include "all.h" #include #include /* While a clean namespace is usually a pretty good thing, we really need * to use shorter names than the whole xcb_randr_* default names. */ typedef xcb_randr_get_crtc_info_reply_t crtc_info; typedef xcb_randr_get_screen_resources_current_reply_t resources_reply; /* Pointer to the result of the query for primary output */ xcb_randr_get_output_primary_reply_t *primary; /* Stores all outputs available in your current session. */ struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs); static bool randr_disabled = false; /* * Get a specific output by its internal X11 id. Used by randr_query_outputs * to check if the output is new (only in the first scan) or if we are * re-scanning. * */ static Output *get_output_by_id(xcb_randr_output_t id) { Output *output; TAILQ_FOREACH(output, &outputs, outputs) if (output->id == id) return output; return NULL; } /* * Returns the output with the given name if it is active (!) or NULL. * */ Output *get_output_by_name(const char *name) { Output *output; TAILQ_FOREACH(output, &outputs, outputs) if (output->active && strcasecmp(output->name, name) == 0) return output; return NULL; } /* * Returns the first output which is active. * */ Output *get_first_output(void) { Output *output; TAILQ_FOREACH(output, &outputs, outputs) if (output->active) return output; die("No usable outputs available.\n"); } /* * Returns the active (!) output which contains the coordinates x, y or NULL * if there is no output which contains these coordinates. * */ Output *get_output_containing(int x, int y) { Output *output; TAILQ_FOREACH(output, &outputs, outputs) { if (!output->active) continue; DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n", x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height); if (x >= output->rect.x && x < (output->rect.x + output->rect.width) && y >= output->rect.y && y < (output->rect.y + output->rect.height)) return output; } return NULL; } /* * Gets the output which is the last one in the given direction, for example * the output on the most bottom when direction == D_DOWN, the output most * right when direction == D_RIGHT and so on. * * This function always returns a output. * */ Output *get_output_most(direction_t direction, Output *current) { Output *best = get_output_next(direction, current, FARTHEST_OUTPUT); if (!best) best = current; DLOG("current = %s, best = %s\n", current->name, best->name); return best; } /* * Gets the output which is the next one in the given direction. * */ Output *get_output_next(direction_t direction, Output *current, output_close_far_t close_far) { Rect *cur = &(current->rect), *other; Output *output, *best = NULL; TAILQ_FOREACH(output, &outputs, outputs) { if (!output->active) continue; other = &(output->rect); if ((direction == D_RIGHT && other->x > cur->x) || (direction == D_LEFT && other->x < cur->x)) { /* Skip the output when it doesn’t overlap the other one’s y * coordinate at all. */ if ((other->y + other->height) <= cur->y || (cur->y + cur->height) <= other->y) continue; } else if ((direction == D_DOWN && other->y > cur->y) || (direction == D_UP && other->y < cur->y)) { /* Skip the output when it doesn’t overlap the other one’s x * coordinate at all. */ if ((other->x + other->width) <= cur->x || (cur->x + cur->width) <= other->x) continue; } else continue; /* No candidate yet? Start with this one. */ if (!best) { best = output; continue; } if (close_far == CLOSEST_OUTPUT) { /* Is this output better (closer to the current output) than our * current best bet? */ if ((direction == D_RIGHT && other->x < best->rect.x) || (direction == D_LEFT && other->x > best->rect.x) || (direction == D_DOWN && other->y < best->rect.y) || (direction == D_UP && other->y > best->rect.y)) { best = output; continue; } } else { /* Is this output better (farther to the current output) than our * current best bet? */ if ((direction == D_RIGHT && other->x > best->rect.x) || (direction == D_LEFT && other->x < best->rect.x) || (direction == D_DOWN && other->y > best->rect.y) || (direction == D_UP && other->y < best->rect.y)) { best = output; continue; } } } DLOG("current = %s, best = %s\n", current->name, (best ? best->name : "NULL")); return best; } /* * Disables RandR support by creating exactly one output with the size of the * X11 screen. * */ void disable_randr(xcb_connection_t *conn) { DLOG("RandR extension unusable, disabling.\n"); Output *s = scalloc(sizeof(Output)); s->active = true; s->rect.x = 0; s->rect.y = 0; s->rect.width = root_screen->width_in_pixels; s->rect.height = root_screen->height_in_pixels; s->name = "xroot-0"; output_init_con(s); init_ws_for_output(s, output_get_content(s->con)); TAILQ_INSERT_TAIL(&outputs, s, outputs); randr_disabled = true; } /* * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart * before) to use for the given Output. * */ void output_init_con(Output *output) { Con *con = NULL, *current; bool reused = false; DLOG("init_con for output %s\n", output->name); /* Search for a Con with that name directly below the root node. There * might be one from a restored layout. */ TAILQ_FOREACH(current, &(croot->nodes_head), nodes) { if (strcmp(current->name, output->name) != 0) continue; con = current; reused = true; DLOG("Using existing con %p / %s\n", con, con->name); break; } if (con == NULL) { con = con_new(croot, NULL); FREE(con->name); con->name = sstrdup(output->name); con->type = CT_OUTPUT; con->layout = L_OUTPUT; con_fix_percent(croot); } con->rect = output->rect; output->con = con; char *name; sasprintf(&name, "[i3 con] output %s", con->name); x_set_name(con, name); FREE(name); if (reused) { DLOG("Not adding workspace, this was a reused con\n"); return; } DLOG("Changing layout, adding top/bottom dockarea\n"); Con *topdock = con_new(NULL, NULL); topdock->type = CT_DOCKAREA; topdock->layout = L_DOCKAREA; /* this container swallows dock clients */ Match *match = scalloc(sizeof(Match)); match_init(match); match->dock = M_DOCK_TOP; match->insert_where = M_BELOW; TAILQ_INSERT_TAIL(&(topdock->swallow_head), match, matches); FREE(topdock->name); topdock->name = sstrdup("topdock"); sasprintf(&name, "[i3 con] top dockarea %s", con->name); x_set_name(topdock, name); FREE(name); DLOG("attaching\n"); con_attach(topdock, con, false); /* content container */ DLOG("adding main content container\n"); Con *content = con_new(NULL, NULL); content->type = CT_CON; content->layout = L_SPLITH; FREE(content->name); content->name = sstrdup("content"); sasprintf(&name, "[i3 con] content %s", con->name); x_set_name(content, name); FREE(name); con_attach(content, con, false); /* bottom dock container */ Con *bottomdock = con_new(NULL, NULL); bottomdock->type = CT_DOCKAREA; bottomdock->layout = L_DOCKAREA; /* this container swallows dock clients */ match = scalloc(sizeof(Match)); match_init(match); match->dock = M_DOCK_BOTTOM; match->insert_where = M_BELOW; TAILQ_INSERT_TAIL(&(bottomdock->swallow_head), match, matches); FREE(bottomdock->name); bottomdock->name = sstrdup("bottomdock"); sasprintf(&name, "[i3 con] bottom dockarea %s", con->name); x_set_name(bottomdock, name); FREE(name); DLOG("attaching\n"); con_attach(bottomdock, con, false); } /* * Initializes at least one workspace for this output, trying the following * steps until there is at least one workspace: * * • Move existing workspaces, which are assigned to be on the given output, to * the output. * • Create the first assigned workspace for this output. * • Create the first unused workspace. * */ void init_ws_for_output(Output *output, Con *content) { /* go through all assignments and move the existing workspaces to this output */ struct Workspace_Assignment *assignment; TAILQ_FOREACH(assignment, &ws_assignments, ws_assignments) { if (strcmp(assignment->output, output->name) != 0) continue; /* check if this workspace actually exists */ Con *workspace = NULL, *out; TAILQ_FOREACH(out, &(croot->nodes_head), nodes) GREP_FIRST(workspace, output_get_content(out), !strcasecmp(child->name, assignment->name)); if (workspace == NULL) continue; /* check that this workspace is not already attached (that means the * user configured this assignment twice) */ Con *workspace_out = con_get_output(workspace); if (workspace_out == output->con) { LOG("Workspace \"%s\" assigned to output \"%s\", but it is already " "there. Do you have two assignment directives for the same " "workspace in your configuration file?\n", workspace->name, output->name); continue; } /* if so, move it over */ LOG("Moving workspace \"%s\" from output \"%s\" to \"%s\" due to assignment\n", workspace->name, workspace_out->name, output->name); /* if the workspace is currently visible on that output, we need to * switch to a different workspace - otherwise the output would end up * with no active workspace */ bool visible = workspace_is_visible(workspace); Con *previous = NULL; if (visible && (previous = TAILQ_NEXT(workspace, focused))) { LOG("Switching to previously used workspace \"%s\" on output \"%s\"\n", previous->name, workspace_out->name); workspace_show(previous); } /* Render the output on which the workspace was to get correct Rects. * Then, we need to work with the "content" container, since we cannot * be sure that the workspace itself was rendered at all (in case it’s * invisible, it won’t be rendered). */ render_con(workspace_out, false); Con *ws_out_content = output_get_content(workspace_out); Con *floating_con; TAILQ_FOREACH(floating_con, &(workspace->floating_head), floating_windows) /* NB: We use output->con here because content is not yet rendered, * so it has a rect of {0, 0, 0, 0}. */ floating_fix_coordinates(floating_con, &(ws_out_content->rect), &(output->con->rect)); con_detach(workspace); con_attach(workspace, content, false); /* In case the workspace we just moved was visible but there was no * other workspace to switch to, we need to initialize the source * output aswell */ if (visible && previous == NULL) { LOG("There is no workspace left on \"%s\", re-initializing\n", workspace_out->name); init_ws_for_output(get_output_by_name(workspace_out->name), output_get_content(workspace_out)); DLOG("Done re-initializing, continuing with \"%s\"\n", output->name); } } /* if a workspace exists, we are done now */ if (!TAILQ_EMPTY(&(content->nodes_head))) { /* ensure that one of the workspaces is actually visible (in fullscreen * mode), if they were invisible before, this might not be the case. */ Con *visible = NULL; GREP_FIRST(visible, content, child->fullscreen_mode == CF_OUTPUT); if (!visible) { visible = TAILQ_FIRST(&(content->nodes_head)); focused = content; workspace_show(visible); } return; } /* otherwise, we create the first assigned ws for this output */ TAILQ_FOREACH(assignment, &ws_assignments, ws_assignments) { if (strcmp(assignment->output, output->name) != 0) continue; LOG("Initializing first assigned workspace \"%s\" for output \"%s\"\n", assignment->name, assignment->output); focused = content; workspace_show_by_name(assignment->name); return; } /* if there is still no workspace, we create the first free workspace */ DLOG("Now adding a workspace\n"); Con *ws = create_workspace_on_output(output, content); /* TODO: Set focus in main.c */ con_focus(ws); } /* * This function needs to be called when changing the mode of an output when * it already has some workspaces (or a bar window) assigned. * * It reconfigures the bar window for the new mode, copies the new rect into * each workspace on this output and forces all windows on the affected * workspaces to be reconfigured. * * It is necessary to call render_layout() afterwards. * */ static void output_change_mode(xcb_connection_t *conn, Output *output) { DLOG("Output mode changed, updating rect\n"); assert(output->con != NULL); output->con->rect = output->rect; Con *content, *workspace, *child; /* Point content to the container of the workspaces */ content = output_get_content(output->con); /* Fix the position of all floating windows on this output. * The 'rect' of each workspace will be updated in src/render.c. */ TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) { TAILQ_FOREACH(child, &(workspace->floating_head), floating_windows) { floating_fix_coordinates(child, &(workspace->rect), &(output->con->rect)); } } /* If default_orientation is NO_ORIENTATION, we change the orientation of * the workspaces and their childs depending on output resolution. This is * only done for workspaces with maximum one child. */ if (config.default_orientation == NO_ORIENTATION) { TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) { /* Workspaces with more than one child are left untouched because * we do not want to change an existing layout. */ if (con_num_children(workspace) > 1) continue; workspace->layout = (output->rect.height > output->rect.width) ? L_SPLITV : L_SPLITH; DLOG("Setting workspace [%d,%s]'s layout to %d.\n", workspace->num, workspace->name, workspace->layout); if ((child = TAILQ_FIRST(&(workspace->nodes_head)))) { if (child->layout == L_SPLITV || child->layout == L_SPLITH) child->layout = workspace->layout; DLOG("Setting child [%d,%s]'s layout to %d.\n", child->num, child->name, child->layout); } } } } /* * Gets called by randr_query_outputs() for each output. The function adds new * outputs to the list of outputs, checks if the mode of existing outputs has * been changed or if an existing output has been disabled. It will then change * either the "changed" or the "to_be_deleted" flag of the output, if * appropriate. * */ static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id, xcb_randr_get_output_info_reply_t *output, xcb_timestamp_t cts, resources_reply *res) { /* each CRT controller has a position in which we are interested in */ crtc_info *crtc; Output *new = get_output_by_id(id); bool existing = (new != NULL); if (!existing) new = scalloc(sizeof(Output)); new->id = id; new->primary = (primary && primary->output == id); FREE(new->name); sasprintf(&new->name, "%.*s", xcb_randr_get_output_info_name_length(output), xcb_randr_get_output_info_name(output)); DLOG("found output with name %s\n", new->name); /* Even if no CRTC is used at the moment, we store the output so that * we do not need to change the list ever again (we only update the * position/size) */ if (output->crtc == XCB_NONE) { if (!existing) { if (new->primary) TAILQ_INSERT_HEAD(&outputs, new, outputs); else TAILQ_INSERT_TAIL(&outputs, new, outputs); } else if (new->active) new->to_be_disabled = true; return; } xcb_randr_get_crtc_info_cookie_t icookie; icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts); if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) { DLOG("Skipping output %s: could not get CRTC (%p)\n", new->name, crtc); free(new); return; } bool updated = update_if_necessary(&(new->rect.x), crtc->x) | update_if_necessary(&(new->rect.y), crtc->y) | update_if_necessary(&(new->rect.width), crtc->width) | update_if_necessary(&(new->rect.height), crtc->height); free(crtc); new->active = (new->rect.width != 0 && new->rect.height != 0); if (!new->active) { DLOG("width/height 0/0, disabling output\n"); return; } DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height, new->rect.x, new->rect.y); /* If we don’t need to change an existing output or if the output * does not exist in the first place, the case is simple: we either * need to insert the new output or we are done. */ if (!updated || !existing) { if (!existing) { if (new->primary) TAILQ_INSERT_HEAD(&outputs, new, outputs); else TAILQ_INSERT_TAIL(&outputs, new, outputs); } return; } new->changed = true; } /* * (Re-)queries the outputs via RandR and stores them in the list of outputs. * */ void randr_query_outputs(void) { Output *output, *other, *first; xcb_randr_get_output_primary_cookie_t pcookie; xcb_randr_get_screen_resources_current_cookie_t rcookie; resources_reply *res; /* timestamp of the configuration so that we get consistent replies to all * requests (if the configuration changes between our different calls) */ xcb_timestamp_t cts; /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */ xcb_randr_output_t *randr_outputs; if (randr_disabled) return; /* Get screen resources (primary output, crtcs, outputs, modes) */ rcookie = xcb_randr_get_screen_resources_current(conn, root); pcookie = xcb_randr_get_output_primary(conn, root); if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL) ELOG("Could not get RandR primary output\n"); else DLOG("primary output is %08x\n", primary->output); if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) { disable_randr(conn); return; } cts = res->config_timestamp; int len = xcb_randr_get_screen_resources_current_outputs_length(res); randr_outputs = xcb_randr_get_screen_resources_current_outputs(res); /* Request information for each output */ xcb_randr_get_output_info_cookie_t ocookie[len]; for (int i = 0; i < len; i++) ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts); /* Loop through all outputs available for this X11 screen */ for (int i = 0; i < len; i++) { xcb_randr_get_output_info_reply_t *output; if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL) continue; handle_output(conn, randr_outputs[i], output, cts, res); free(output); } /* Check for clones, disable the clones and reduce the mode to the * lowest common mode */ TAILQ_FOREACH(output, &outputs, outputs) { if (!output->active || output->to_be_disabled) continue; DLOG("output %p / %s, position (%d, %d), checking for clones\n", output, output->name, output->rect.x, output->rect.y); for (other = output; other != TAILQ_END(&outputs); other = TAILQ_NEXT(other, outputs)) { if (other == output || !other->active || other->to_be_disabled) continue; if (other->rect.x != output->rect.x || other->rect.y != output->rect.y) continue; DLOG("output %p has the same position, his mode = %d x %d\n", other, other->rect.width, other->rect.height); uint32_t width = min(other->rect.width, output->rect.width); uint32_t height = min(other->rect.height, output->rect.height); if (update_if_necessary(&(output->rect.width), width) | update_if_necessary(&(output->rect.height), height)) output->changed = true; update_if_necessary(&(other->rect.width), width); update_if_necessary(&(other->rect.height), height); DLOG("disabling output %p (%s)\n", other, other->name); other->to_be_disabled = true; DLOG("new output mode %d x %d, other mode %d x %d\n", output->rect.width, output->rect.height, other->rect.width, other->rect.height); } } /* Ensure that all outputs which are active also have a con. This is * necessary because in the next step, a clone might get disabled. Example: * LVDS1 active, VGA1 gets activated as a clone of LVDS1 (has no con). * LVDS1 gets disabled. */ TAILQ_FOREACH(output, &outputs, outputs) { if (output->active && output->con == NULL) { DLOG("Need to initialize a Con for output %s\n", output->name); output_init_con(output); output->changed = false; } } /* Handle outputs which have a new mode or are disabled now (either * because the user disabled them or because they are clones) */ TAILQ_FOREACH(output, &outputs, outputs) { if (output->to_be_disabled) { output->active = false; DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name); first = get_first_output(); /* TODO: refactor the following code into a nice function. maybe * use an on_destroy callback which is implement differently for * different container types (CT_CONTENT vs. CT_DOCKAREA)? */ Con *first_content = output_get_content(first->con); if (output->con != NULL) { /* We need to move the workspaces from the disappearing output to the first output */ /* 1: Get the con to focus next, if the disappearing ws is focused */ Con *next = NULL; if (TAILQ_FIRST(&(croot->focus_head)) == output->con) { DLOG("This output (%p) was focused! Getting next\n", output->con); next = focused; DLOG("next = %p\n", next); } /* 2: iterate through workspaces and re-assign them, fixing the coordinates * of floating containers as we go */ Con *current; Con *old_content = output_get_content(output->con); while (!TAILQ_EMPTY(&(old_content->nodes_head))) { current = TAILQ_FIRST(&(old_content->nodes_head)); if (current != next && TAILQ_EMPTY(&(current->focus_head))) { /* the workspace is empty and not focused, get rid of it */ DLOG("Getting rid of current = %p / %s (empty, unfocused)\n", current, current->name); tree_close(current, DONT_KILL_WINDOW, false, false); continue; } DLOG("Detaching current = %p / %s\n", current, current->name); con_detach(current); DLOG("Re-attaching current = %p / %s\n", current, current->name); con_attach(current, first_content, false); DLOG("Fixing the coordinates of floating containers\n"); Con *floating_con; TAILQ_FOREACH(floating_con, &(current->floating_head), floating_windows) floating_fix_coordinates(floating_con, &(output->con->rect), &(first->con->rect)); DLOG("Done, next\n"); } DLOG("re-attached all workspaces\n"); if (next) { DLOG("now focusing next = %p\n", next); con_focus(next); workspace_show(con_get_workspace(next)); } /* 3: move the dock clients to the first output */ Con *child; TAILQ_FOREACH(child, &(output->con->nodes_head), nodes) { if (child->type != CT_DOCKAREA) continue; DLOG("Handling dock con %p\n", child); Con *dock; while (!TAILQ_EMPTY(&(child->nodes_head))) { dock = TAILQ_FIRST(&(child->nodes_head)); Con *nc; Match *match; nc = con_for_window(first->con, dock->window, &match); DLOG("Moving dock client %p to nc %p\n", dock, nc); con_detach(dock); DLOG("Re-attaching\n"); con_attach(dock, nc, false); DLOG("Done\n"); } } DLOG("destroying disappearing con %p\n", output->con); tree_close(output->con, DONT_KILL_WINDOW, true, false); DLOG("Done. Should be fine now\n"); output->con = NULL; } output->to_be_disabled = false; output->changed = false; } if (output->changed) { output_change_mode(conn, output); output->changed = false; } } if (TAILQ_EMPTY(&outputs)) { ELOG("No outputs found via RandR, disabling\n"); disable_randr(conn); } /* Verifies that there is at least one active output as a side-effect. */ get_first_output(); /* Just go through each active output and assign one workspace */ TAILQ_FOREACH(output, &outputs, outputs) { if (!output->active) continue; Con *content = output_get_content(output->con); if (!TAILQ_EMPTY(&(content->nodes_head))) continue; DLOG("Should add ws for output %s\n", output->name); init_ws_for_output(output, content); } /* Focus the primary screen, if possible */ TAILQ_FOREACH(output, &outputs, outputs) { if (!output->primary || !output->con) continue; DLOG("Focusing primary output %s\n", output->name); con_focus(con_descend_focused(output->con)); } /* render_layout flushes */ tree_render(); FREE(res); FREE(primary); } /* * We have just established a connection to the X server and need the initial * XRandR information to setup workspaces for each screen. * */ void randr_init(int *event_base) { const xcb_query_extension_reply_t *extreply; extreply = xcb_get_extension_data(conn, &xcb_randr_id); if (!extreply->present) { disable_randr(conn); return; } else randr_query_outputs(); if (event_base != NULL) *event_base = extreply->first_event; xcb_randr_select_input(conn, root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE | XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE | XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE | XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY); xcb_flush(conn); }