/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* For more information on RandR, please see the X.org RandR specification at
* https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
* (take your time to read it completely, it answers all questions).
*
*/
#include "all.h"
#include <time.h>
#include <xcb/randr.h>
/* 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);
/* This is the output covering the root window */
static Output *root_output;
static bool has_randr_1_5 = 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 or NULL.
* If require_active is true, only active outputs are considered.
*
*/
Output *get_output_by_name(const char *name, const bool require_active) {
Output *output;
bool get_primary = (strcasecmp("primary", name) == 0);
TAILQ_FOREACH (output, &outputs, outputs) {
if (require_active && !output->active) {
continue;
}
if (output->primary && get_primary) {
return output;
}
struct output_name *output_name;
SLIST_FOREACH (output_name, &output->names_head, names) {
if (strcasecmp(output_name->name, name) == 0) {
return output;
}
}
}
return NULL;
}
/*
* Returns the first output which is active.
*
*/
Output *get_first_output(void) {
Output *output, *result = NULL;
TAILQ_FOREACH (output, &outputs, outputs) {
if (output->active) {
if (output->primary) {
return output;
}
if (!result) {
result = output;
}
}
}
if (result) {
return result;
}
die("No usable outputs available.\n");
}
/*
* Check whether there are any active outputs (excluding the root output).
*
*/
static bool any_randr_output_active(void) {
Output *output;
TAILQ_FOREACH (output, &outputs, outputs) {
if (output != root_output && !output->to_be_disabled && output->active)
return true;
}
return false;
}
/*
* 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(unsigned int x, unsigned 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;
}
/*
* Returns the active output which contains the midpoint of the given rect. If
* such an output doesn't exist, returns the output which contains most of the
* rectangle or NULL if there is no output which intersects with it.
*
*/
Output *get_output_from_rect(Rect rect) {
unsigned int mid_x = rect.x + rect.width / 2;
unsigned int mid_y = rect.y + rect.height / 2;
Output *output = get_output_containing(mid_x, mid_y);
return output ? output : output_containing_rect(rect);
}
/*
* Returns the active output which spans exactly the area specified by
* rect or NULL if there is no output like this.
*
*/
Output *get_output_with_dimensions(Rect rect) {
Output *output;
TAILQ_FOREACH (output, &outputs, outputs) {
if (!output->active)
continue;
DLOG("comparing x=%d y=%d %dx%d with x=%d and y=%d %dx%d\n",
rect.x, rect.y, rect.width, rect.height,
output->rect.x, output->rect.y, output->rect.width, output->rect.height);
if (rect.x == output->rect.x && rect.width == output->rect.width &&
rect.y == output->rect.y && rect.height == output->rect.height)
return output;
}
return NULL;
}
/*
* In output_containing_rect, we check if any active output contains part of the container.
* We do this by checking if the output rect is intersected by the Rect.
* This is the 2-dimensional counterpart of get_output_containing.
* Returns the output with the maximum intersecting area.
*
*/
Output *output_containing_rect(Rect rect) {
Output *output;
int lx = rect.x, uy = rect.y;
int rx = rect.x + rect.width, by = rect.y + rect.height;
long max_area = 0;
Output *result = NULL;
TAILQ_FOREACH (output, &outputs, outputs) {
if (!output->active)
continue;
int lx_o = (int)output->rect.x, uy_o = (int)output->rect.y;
int rx_o = (int)(output->rect.x + output->rect.width), by_o = (int)(output->rect.y + output->rect.height);
DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
rect.x, rect.y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
int left = max(lx, lx_o);
int right = min(rx, rx_o);
int bottom = min(by, by_o);
int top = max(uy, uy_o);
if (left < right && bottom > top) {
long area = (right - left) * (bottom - top);
if (area > max_area) {
result = output;
}
}
}
return result;
}
/*
* Like get_output_next with close_far == CLOSEST_OUTPUT, but wraps.
*
* For example if get_output_next(D_DOWN, x, FARTHEST_OUTPUT) = NULL, then
* get_output_next_wrap(D_DOWN, x) will return the topmost output.
*
* This function always returns a output: if no active outputs can be found,
* current itself is returned.
*
*/
Output *get_output_next_wrap(direction_t direction, Output *current) {
Output *best = get_output_next(direction, current, CLOSEST_OUTPUT);
/* If no output can be found, wrap */
if (!best) {
direction_t opposite;
if (direction == D_RIGHT)
opposite = D_LEFT;
else if (direction == D_LEFT)
opposite = D_RIGHT;
else if (direction == D_DOWN)
opposite = D_UP;
else
opposite = D_DOWN;
best = get_output_next(opposite, current, FARTHEST_OUTPUT);
}
if (!best)
best = current;
DLOG("current = %s, best = %s\n", output_primary_name(current), output_primary_name(best));
return best;
}
/*
* Gets the output which is the next one in the given direction.
*
* If close_far == CLOSEST_OUTPUT, then the output next to the current one will
* selected. If close_far == FARTHEST_OUTPUT, the output which is the last one
* in the given direction will be selected.
*
* NULL will be returned when no active outputs are present in the direction
* specified (note that “current” counts as such an output).
*
*/
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", output_primary_name(current), (best ? output_primary_name(best) : "NULL"));
return best;
}
/*
* Creates an output covering the root window.
*
*/
Output *create_root_output(xcb_connection_t *conn) {
Output *s = scalloc(1, sizeof(Output));
s->active = false;
s->rect.x = 0;
s->rect.y = 0;
s->rect.width = root_screen->width_in_pixels;
s->rect.height = root_screen->height_in_pixels;
struct output_name *output_name = scalloc(1, sizeof(struct output_name));
output_name->name = "xroot-0";
SLIST_INIT(&s->names_head);
SLIST_INSERT_HEAD(&s->names_head, output_name, names);
return s;
}
/*
* 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_primary_name(output));
/* 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_primary_name(output)) != 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_primary_name(output));
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(1, 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(1, 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);
/* Change focus to the content container */
TAILQ_REMOVE(&(con->focus_head), content, focused);
TAILQ_INSERT_HEAD(&(con->focus_head), content, focused);
}
/*
* 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 = output_get_content(output->con);
Con *previous_focus = con_get_workspace(focused);
/* Iterate over all workspaces and check if any of them should be assigned
* to this output.
* Note: in order to do that we iterate over all_cons and not using another
* list that would be updated during iteration by the
* workspace_move_to_output function. */
Con *workspace;
TAILQ_FOREACH (workspace, &all_cons, all_cons) {
if (workspace->type != CT_WORKSPACE || con_is_internal(workspace)) {
continue;
}
Con *workspace_out = get_assigned_output(workspace->name, workspace->num);
if (output->con != workspace_out) {
continue;
}
DLOG("Moving workspace \"%s\" from output \"%s\" to \"%s\" due to assignment\n",
workspace->name, output_primary_name(get_output_for_con(workspace)),
output_primary_name(output));
/* Need to copy output's rect since content is not yet rendered. We
* can't call render_con here because render_output only proceeds
* if a workspace exists. */
content->rect = output->con->rect;
workspace_move_to_output(workspace, output);
}
/* Temporarily set the focused container, might not be initialized yet. */
focused = content;
/* 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));
workspace_show(visible);
}
goto restore_focus;
}
/* otherwise, we create the first assigned ws for this output */
struct Workspace_Assignment *assignment;
TAILQ_FOREACH (assignment, &ws_assignments, ws_assignments) {
if (!output_triggers_assignment(output, assignment)) {
continue;
}
LOG("Initializing first assigned workspace \"%s\" for output \"%s\"\n",
assignment->name, assignment->output);
workspace_show_by_name(assignment->name);
goto restore_focus;
}
/* if there is still no workspace, we create the first free workspace */
DLOG("Now adding a workspace\n");
workspace_show(create_workspace_on_output(output, content));
restore_focus:
if (previous_focus) {
workspace_show(previous_focus);
}
}
/*
* 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 children 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);
}
}
}
}
/*
* randr_query_outputs_15 uses RandR ≥ 1.5 to update outputs.
*
*/
static bool randr_query_outputs_15(void) {
#if XCB_RANDR_MINOR_VERSION < 5
return false;
#else
/* RandR 1.5 available at compile-time, i.e. libxcb is new enough */
if (!has_randr_1_5) {
return false;
}
/* RandR 1.5 available at run-time (supported by the server and not
* disabled by the user) */
DLOG("Querying outputs using RandR 1.5\n");
xcb_generic_error_t *err;
xcb_randr_get_monitors_reply_t *monitors =
xcb_randr_get_monitors_reply(
conn, xcb_randr_get_monitors(conn, root, true), &err);
if (err != NULL) {
ELOG("Could not get RandR monitors: X11 error code %d\n", err->error_code);
free(err);
/* Fall back to RandR ≤ 1.4 */
return false;
}
/* Mark all outputs as to_be_disabled, since xcb_randr_get_monitors() will
* only return active outputs. */
Output *output;
TAILQ_FOREACH (output, &outputs, outputs) {
if (output != root_output) {
output->to_be_disabled = true;
}
}
DLOG("%d RandR monitors found (timestamp %d)\n",
xcb_randr_get_monitors_monitors_length(monitors),
monitors->timestamp);
xcb_randr_monitor_info_iterator_t iter;
for (iter = xcb_randr_get_monitors_monitors_iterator(monitors);
iter.rem;
xcb_randr_monitor_info_next(&iter)) {
const xcb_randr_monitor_info_t *monitor_info = iter.data;
xcb_get_atom_name_reply_t *atom_reply =
xcb_get_atom_name_reply(
conn, xcb_get_atom_name(conn, monitor_info->name), &err);
if (err != NULL) {
ELOG("Could not get RandR monitor name: X11 error code %d\n", err->error_code);
free(err);
continue;
}
char *name;
sasprintf(&name, "%.*s",
xcb_get_atom_name_name_length(atom_reply),
xcb_get_atom_name_name(atom_reply));
free(atom_reply);
Output *new = get_output_by_name(name, false);
if (new == NULL) {
new = scalloc(1, sizeof(Output));
SLIST_INIT(&new->names_head);
/* Register associated output names in addition to the monitor name */
xcb_randr_output_t *randr_outputs = xcb_randr_monitor_info_outputs(monitor_info);
int randr_output_len = xcb_randr_monitor_info_outputs_length(monitor_info);
for (int i = 0; i < randr_output_len; i++) {
xcb_randr_output_t randr_output = randr_outputs[i];
xcb_randr_get_output_info_reply_t *info =
xcb_randr_get_output_info_reply(conn,
xcb_randr_get_output_info(conn, randr_output, monitors->timestamp),
NULL);
if (info != NULL && info->crtc != XCB_NONE) {
char *oname;
sasprintf(&oname, "%.*s",
xcb_randr_get_output_info_name_length(info),
xcb_randr_get_output_info_name(info));
if (strcmp(name, oname) != 0) {
struct output_name *output_name = scalloc(1, sizeof(struct output_name));
output_name->name = sstrdup(oname);
SLIST_INSERT_HEAD(&new->names_head, output_name, names);
} else {
free(oname);
}
}
FREE(info);
}
/* Insert the monitor name last, so that it's used as the primary name */
struct output_name *output_name = scalloc(1, sizeof(struct output_name));
output_name->name = sstrdup(name);
SLIST_INSERT_HEAD(&new->names_head, output_name, names);
if (monitor_info->primary) {
TAILQ_INSERT_HEAD(&outputs, new, outputs);
} else {
TAILQ_INSERT_TAIL(&outputs, new, outputs);
}
}
/* We specified get_active == true in xcb_randr_get_monitors(), so we
* will only receive active outputs. */
new->active = true;
new->to_be_disabled = false;
new->primary = monitor_info->primary;
const bool update_x = update_if_necessary(&(new->rect.x), monitor_info->x);
const bool update_y = update_if_necessary(&(new->rect.y), monitor_info->y);
const bool update_w = update_if_necessary(&(new->rect.width), monitor_info->width);
const bool update_h = update_if_necessary(&(new->rect.height), monitor_info->height);
new->changed = update_x || update_y || update_w || update_h;
DLOG("name %s, x %d, y %d, width %d px, height %d px, width %d mm, height %d mm, primary %d, automatic %d\n",
name,
monitor_info->x, monitor_info->y, monitor_info->width, monitor_info->height,
monitor_info->width_in_millimeters, monitor_info->height_in_millimeters,
monitor_info->primary, monitor_info->automatic);
free(name);
}
free(monitors);
return true;
#endif
}
/*
* Gets called by randr_query_outputs_14() 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,
xcb_randr_get_screen_resources_current_reply_t *res) {
/* each CRT controller has a position in which we are interested in */
xcb_randr_get_crtc_info_reply_t *crtc;
Output *new = get_output_by_id(id);
bool existing = (new != NULL);
if (!existing) {
new = scalloc(1, sizeof(Output));
SLIST_INIT(&new->names_head);
}
new->id = id;
new->primary = (primary && primary->output == id);
while (!SLIST_EMPTY(&new->names_head)) {
FREE(SLIST_FIRST(&new->names_head)->name);
struct output_name *old_head = SLIST_FIRST(&new->names_head);
SLIST_REMOVE_HEAD(&new->names_head, names);
FREE(old_head);
}
struct output_name *output_name = scalloc(1, sizeof(struct output_name));
sasprintf(&output_name->name, "%.*s",
xcb_randr_get_output_info_name_length(output),
xcb_randr_get_output_info_name(output));
SLIST_INSERT_HEAD(&new->names_head, output_name, names);
DLOG("found output with name %s\n", output_primary_name(new));
/* 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",
output_primary_name(new), crtc);
free(new);
return;
}
const bool update_x = update_if_necessary(&(new->rect.x), crtc->x);
const bool update_y = update_if_necessary(&(new->rect.y), crtc->y);
const bool update_w = update_if_necessary(&(new->rect.width), crtc->width);
const bool update_h = update_if_necessary(&(new->rect.height), crtc->height);
const bool updated = update_x || update_y || update_w || update_h;
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;
}
/*
* randr_query_outputs_14 uses RandR ≤ 1.4 to update outputs.
*
*/
static void randr_query_outputs_14(void) {
DLOG("Querying outputs using RandR ≤ 1.4\n");
/* Get screen resources (primary output, crtcs, outputs, modes) */
xcb_randr_get_screen_resources_current_cookie_t rcookie;
rcookie = xcb_randr_get_screen_resources_current(conn, root);
xcb_randr_get_output_primary_cookie_t pcookie;
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);
xcb_randr_get_screen_resources_current_reply_t *res =
xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL);
if (res == NULL) {
ELOG("Could not query screen resources.\n");
return;
}
/* timestamp of the configuration so that we get consistent replies to all
* requests (if the configuration changes between our different calls) */
const xcb_timestamp_t cts = res->config_timestamp;
const int len = xcb_randr_get_screen_resources_current_outputs_length(res);
/* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
xcb_randr_output_t *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);
}
FREE(res);
}
/*
* Move the content of an outputs container to the first output.
*
* TODO: Maybe use an on_destroy callback which is implement differently for
* different container types (CT_CONTENT vs. CT_DOCKAREA)?
*
*/
static void move_content(Con *con) {
Con *first = get_first_output()->con;
Con *first_content = output_get_content(first);
/* We need to move the workspaces from the disappearing output to the first output */
/* 1: Get the con to focus next */
Con *next = focused;
/* 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(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_internal(current, DONT_KILL_WINDOW, 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, &(con->rect), &(first->rect));
}
}
/* Restore focus after con_detach / con_attach. next can be NULL, see #3523. */
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, &(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, 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", con);
tree_close_internal(con, DONT_KILL_WINDOW, true);
}
/*
* (Re-)queries the outputs via RandR and stores them in the list of outputs.
*
* If no outputs are found use the root window.
*
*/
void randr_query_outputs(void) {
Output *output, *other;
if (!randr_query_outputs_15()) {
randr_query_outputs_14();
}
/* If there's no randr output, enable the output covering the root window. */
if (any_randr_output_active()) {
DLOG("Active RandR output found. Disabling root output.\n");
if (root_output && root_output->active) {
root_output->to_be_disabled = true;
}
} else {
DLOG("No active RandR output found. Enabling root output.\n");
root_output->active = true;
}
/* 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_primary_name(output), 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, its 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);
const bool update_w = update_if_necessary(&(output->rect.width), width);
const bool update_h = update_if_necessary(&(output->rect.height), height);
if (update_w || update_h) {
output->changed = true;
}
update_if_necessary(&(other->rect.width), width);
update_if_necessary(&(other->rect.height), height);
DLOG("disabling output %p (%s)\n", other, output_primary_name(other));
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_primary_name(output));
output_init_con(output);
output->changed = false;
}
}
/* Ensure that all containers with type CT_OUTPUT have a valid
* corresponding entry in outputs. This can happen in situations related to
* those mentioned #3767 e.g. when a CT_OUTPUT is created from an in-place
* restart's layout but the output is disabled by a randr query happening
* at the same time. */
Con *con;
for (con = TAILQ_FIRST(&(croot->nodes_head)); con;) {
Con *next = TAILQ_NEXT(con, nodes);
if (!con_is_internal(con) && get_output_by_name(con->name, true) == NULL) {
DLOG("No output %s found, moving its old content to first output\n", con->name);
move_content(con);
}
con = next;
}
/* 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) {
randr_disable_output(output);
}
if (output->changed) {
output_change_mode(conn, output);
output->changed = false;
}
}
/* 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_primary_name(output));
init_ws_for_output(output);
}
/* Focus the primary screen, if possible */
TAILQ_FOREACH (output, &outputs, outputs) {
if (!output->primary || !output->con)
continue;
DLOG("Focusing primary output %s\n", output_primary_name(output));
Con *content = output_get_content(output->con);
Con *ws = TAILQ_FIRST(&(content)->focus_head);
workspace_show(ws);
}
/* render_layout flushes */
ewmh_update_desktop_properties();
tree_render();
FREE(primary);
}
/*
* Disables the output and moves its content.
*
*/
void randr_disable_output(Output *output) {
assert(output->to_be_disabled);
output->active = false;
DLOG("Output %s disabled, re-assigning workspaces/docks\n", output_primary_name(output));
if (output->con != NULL) {
/* clear the pointer before move_content calls tree_close_internal in which the memory is freed */
Con *con = output->con;
output->con = NULL;
move_content(con);
}
output->to_be_disabled = false;
output->changed = false;
}
static void fallback_to_root_output(void) {
root_output->active = true;
output_init_con(root_output);
init_ws_for_output(root_output);
}
/*
* 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 bool disable_randr15) {
const xcb_query_extension_reply_t *extreply;
root_output = create_root_output(conn);
TAILQ_INSERT_TAIL(&outputs, root_output, outputs);
extreply = xcb_get_extension_data(conn, &xcb_randr_id);
if (!extreply->present) {
DLOG("RandR is not present, activating root output.\n");
fallback_to_root_output();
return;
}
xcb_generic_error_t *err;
xcb_randr_query_version_reply_t *randr_version =
xcb_randr_query_version_reply(
conn, xcb_randr_query_version(conn, XCB_RANDR_MAJOR_VERSION, XCB_RANDR_MINOR_VERSION), &err);
if (err != NULL) {
ELOG("Could not query RandR version: X11 error code %d\n", err->error_code);
free(err);
fallback_to_root_output();
return;
}
has_randr_1_5 = (randr_version->major_version >= 1) &&
(randr_version->minor_version >= 5) &&
!disable_randr15;
free(randr_version);
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);
}