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Implement Xinerama (workspaces have a specific screen)

This commit is contained in:
Michael Stapelberg 2009-02-15 01:58:09 +01:00
parent feaef42694
commit 09cd7bd2d0
11 changed files with 319 additions and 107 deletions
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35
include/data.h
View File

@ -26,6 +26,8 @@ typedef struct Container Container;
typedef struct Client Client;
typedef struct Binding Binding;
typedef struct Workspace Workspace;
typedef struct Rect Rect;
typedef struct Screen i3Screen;
/* Helper types */
typedef enum { D_LEFT, D_RIGHT, D_UP, D_DOWN } direction_t;
@ -42,13 +44,14 @@ enum {
BIND_MODE_SWITCH = (1 << 8)
};
struct Rect {
uint32_t x, y;
uint32_t width, height;
};
struct Workspace {
int x;
int y;
int width;
int height;
int screen_num;
int num;
/* x, y, width, height */
Rect rect;
/* table dimensions */
int cols;
@ -60,6 +63,9 @@ struct Workspace {
Client *fullscreen_client;
/* Backpointer to the screen this workspace is on */
i3Screen *screen;
/* This is a two-dimensional dynamic array of Container-pointers. I’ve always wanted
* to be a three-star programmer :) */
Container ***table;
@ -114,8 +120,8 @@ struct Client {
/* Backpointer. A client is inside a container */
Container *container;
uint32_t x, y;
uint32_t width, height;
/* x, y, width, height */
Rect rect;
/* Name */
char *name;
@ -170,4 +176,17 @@ struct Container {
CIRCLEQ_HEAD(client_head, Client) clients;
};
struct Screen {
/* Virtual screen number */
int num;
/* Current workspace selected on this virtual screen */
int current_workspace;
/* x, y, width, height */
Rect rect;
TAILQ_ENTRY(Screen) screens;
};
#endif

1
include/table.h
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@ -9,6 +9,7 @@
*
*/
#include <stdbool.h>
#include "data.h"
#ifndef _TABLE_H

3
include/util.h
View File

@ -15,9 +15,12 @@
#ifndef _UTIL_H
#define _UTIL_H
int min(int a, int b);
int max(int a, int b);
void start_application(const char *command);
void check_error(xcb_connection_t *connection, xcb_void_cookie_t cookie, char *err_message);
void set_focus(xcb_connection_t *conn, Client *client);
void warp_pointer_into(xcb_connection_t *connection, Client *client);
void toggle_fullscreen(xcb_connection_t *conn, Client *client);
#endif

23
include/xinerama.h Normal file
View File

@ -0,0 +1,23 @@
/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* (c) 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
*/
#include "data.h"
#ifndef _XINERAMA_H
#define _XINERAMA_H
TAILQ_HEAD(screens_head, Screen);
extern struct screens_head virtual_screens;
void initialize_xinerama(xcb_connection_t *conn);
i3Screen *get_screen_at(int x, int y);
i3Screen *get_screen_containing(int x, int y);
#endif

52
src/commands.c
View File

@ -29,20 +29,19 @@ static bool focus_window_in_container(xcb_connection_t *connection, Container *c
if (container->currently_focused == NULL)
return false;
Client *candidad;
Client *candidad = NULL;
if (direction == D_UP)
candidad = CIRCLEQ_PREV(container->currently_focused, clients);
else if (direction == D_DOWN)
candidad = CIRCLEQ_NEXT(container->currently_focused, clients);
else printf("Direction not implemented!\n");
/* If we don’t have anything to select, we’re done */
if (candidad == CIRCLEQ_END(&(container->clients)))
return false;
/* Set focus if we could successfully move */
container->currently_focused = candidad;
xcb_set_input_focus(connection, XCB_INPUT_FOCUS_NONE, candidad->child, XCB_CURRENT_TIME);
render_layout(connection);
set_focus(connection, candidad);
return true;
}
@ -69,7 +68,7 @@ static void focus_window(xcb_connection_t *connection, direction_t direction) {
return;
}
if (CUR_CELL->currently_focused != NULL) {
xcb_set_input_focus(connection, XCB_INPUT_FOCUS_NONE,
xcb_set_input_focus(connection, XCB_INPUT_FOCUS_POINTER_ROOT,
CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
render_layout(connection);
}
@ -112,7 +111,7 @@ static void move_current_window(xcb_connection_t *connection, direction_t direct
printf("moving window to direction %d\n", direction);
/* Get current window */
Container *container = CUR_CELL,
*new;
*new = NULL;
/* There has to be a container, see focus_window() */
assert(container != NULL);
@ -244,18 +243,49 @@ static void snap_current_container(xcb_connection_t *connection, direction_t dir
static void show_workspace(xcb_connection_t *conn, int workspace) {
int cols, rows;
Client *client;
printf("show_workspace(%d)\n", workspace);
xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
/* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
Workspace *t_ws = &(workspaces[workspace-1]);
printf("show_workspace(%d)\n", workspace);
/* Store current_row/current_col */
c_ws->current_row = current_row;
c_ws->current_col = current_col;
/* Check if the workspace has not been used yet */
if (t_ws->screen == NULL) {
printf("initializing new workspace, setting num to %d\n", workspace);
t_ws->screen = c_ws->screen;
/* Copy the dimensions from the virtual screen */
memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
}
if (c_ws->screen != t_ws->screen) {
/* We need to switch to the other screen first */
printf("Just moving over to other screen.\n");
c_ws = &(workspaces[t_ws->screen->current_workspace]);
current_col = c_ws->current_col;
current_row = c_ws->current_row;
if (CUR_CELL->currently_focused != NULL)
warp_pointer_into(conn, CUR_CELL->currently_focused);
else {
Rect *dims = &(c_ws->screen->rect);
xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
dims->x + (dims->width / 2), dims->y + (dims->height / 2));
}
}
/* Check if we need to change something or if we’re already there */
if (c_ws->screen->current_workspace == (workspace-1))
return;
t_ws->screen->current_workspace = workspace-1;
/* TODO: does grabbing the server actually bring us any (speed)advantages? */
//xcb_grab_server(conn);
/* Unmap all clients */
/* Unmap all clients of the current workspace */
for (cols = 0; cols < c_ws->cols; cols++)
for (rows = 0; rows < c_ws->rows; rows++) {
CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
@ -276,8 +306,8 @@ static void show_workspace(xcb_connection_t *conn, int workspace) {
/* Restore focus on the new workspace */
if (CUR_CELL->currently_focused != NULL)
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, root, XCB_CURRENT_TIME);
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, CUR_CELL->currently_focused->child, XCB_CURRENT_TIME);
else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
//xcb_ungrab_server(conn);

12
src/handlers.c
View File

@ -26,6 +26,7 @@
#include "font.h"
#include "xcb.h"
#include "util.h"
#include "xinerama.h"
/*
* Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
@ -105,9 +106,16 @@ int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_
if (client == NULL)
client = table_get(byChild, event->event);
/* If not, then this event is not interesting. This should not happen */
/* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
if (client == NULL) {
printf("DEBUG: Uninteresting enter_notify-event?\n");
printf("Getting screen at %d x %d\n", event->root_x, event->root_y);
i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
if (screen == NULL) {
printf("ERROR: No such screen\n");
return 0;
}
c_ws = &workspaces[screen->current_workspace];
printf("We're now on virtual screen number %d\n", screen->num);
return 1;
}

77
src/layout.c
View File

@ -19,6 +19,7 @@
#include "xcb.h"
#include "table.h"
#include "util.h"
#include "xinerama.h"
/* All functions handling layout/drawing of window decorations */
@ -57,7 +58,7 @@ void decorate_window(xcb_connection_t *conn, Client *client) {
values[0] = background_color;
xcb_change_gc(conn, client->titlegc, mask, values);
xcb_rectangle_t rect = {0, 0, client->width, client->height};
xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &rect);
/* Draw the lines */
@ -70,8 +71,8 @@ void decorate_window(xcb_connection_t *conn, Client *client) {
xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, client->frame, client->titlegc, 2, points); \
}
DRAW_LINE(border_color, 2, 0, client->width, 0);
DRAW_LINE(border_color, 2, font->height + 3, 2 + client->width, font->height + 3);
DRAW_LINE(border_color, 2, 0, client->rect.width, 0);
DRAW_LINE(border_color, 2, font->height + 3, 2 + client->rect.width, font->height + 3);
/* Draw the font */
mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
@ -111,23 +112,23 @@ static void render_container(xcb_connection_t *connection, Container *container)
/* Check if we changed client->x or client->y by updating it…
* Note the bitwise OR instead of logical OR to force evaluation of both statements */
if (client->force_reconfigure |
(client->x != (client->x = container->x + (container->col * container->width))) |
(client->y != (client->y = container->y + (container->row * container->height +
(client->rect.x != (client->rect.x = container->x + (container->col * container->width))) |
(client->rect.y != (client->rect.y = container->y + (container->row * container->height +
(container->height / num_clients) * current_client)))) {
printf("frame needs to be pushed to %dx%d\n", client->x, client->y);
printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
/* Note: We can use a pointer to client->x like an array of uint32_ts
because it is followed by client->y by definition */
xcb_configure_window(connection, client->frame,
XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->x));
XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
}
/* TODO: vertical default layout */
if (client->force_reconfigure |
(client->width != (client->width = container->width)) |
(client->height != (client->height = container->height / num_clients))) {
(client->rect.width != (client->rect.width = container->width)) |
(client->rect.height != (client->rect.height = container->height / num_clients))) {
xcb_configure_window(connection, client->frame,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
&(client->width));
&(client->rect.width));
/* Adjust the position of the child inside its frame.
* The coordinates of the child are relative to its frame, we
@ -136,12 +137,12 @@ static void render_container(xcb_connection_t *connection, Container *container)
XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH |
XCB_CONFIG_WINDOW_HEIGHT;
uint32_t values[4] = {2, /* x */
font->height + 2 + 2, /* y */
client->width - (2 + 2), /* width */
client->height - ((font->height + 2 + 2) + 2)}; /* height */
uint32_t values[4] = {2, /* x */
font->height + 2 + 2, /* y */
client->rect.width - (2 + 2), /* width */
client->rect.height - ((font->height + 2 + 2) + 2)}; /* height */
printf("fullscreen frame/child will be at %dx%d with size %dx%d\n",
printf("child will be at %dx%d with size %dx%d\n",
values[0], values[1], values[2], values[3]);
xcb_configure_window(connection, client->child, mask, values);
@ -157,40 +158,42 @@ static void render_container(xcb_connection_t *connection, Container *container)
}
}
void render_layout(xcb_connection_t *conn) {
void render_layout(xcb_connection_t *connection) {
int cols, rows;
int screen;
for (screen = 0; screen < num_screens; screen++) {
printf("Rendering screen %d\n", screen);
if (workspaces[screen].fullscreen_client != NULL)
i3Screen *screen;
TAILQ_FOREACH(screen, &virtual_screens, screens) {
/* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
Workspace *r_ws = &(workspaces[screen->current_workspace]);
printf("Rendering screen %d\n", screen->num);
if (r_ws->fullscreen_client != NULL)
/* This is easy: A client has entered fullscreen mode, so we don’t render at all */
continue;
/* TODO: get the workspace which is active on the screen */
int width = workspaces[screen].width;
int height = workspaces[screen].height;
int width = r_ws->rect.width;
int height = r_ws->rect.height;
printf("got %d rows and %d cols\n", c_ws->rows, c_ws->cols);
printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
printf("each of them therefore is %d px width and %d px height\n",
width / c_ws->cols, height / c_ws->rows);
width / r_ws->cols, height / r_ws->rows);
/* Go through the whole table and render what’s necessary */
for (cols = 0; cols < c_ws->cols; cols++)
for (rows = 0; rows < c_ws->rows; rows++) {
Container *con = CUR_TABLE[cols][rows];
for (cols = 0; cols < r_ws->cols; cols++)
for (rows = 0; rows < r_ws->rows; rows++) {
Container *container = r_ws->table[cols][rows];
printf("container has %d colspan, %d rowspan\n",
con->colspan, con->rowspan);
container->colspan, container->rowspan);
/* Update position of the container */
con->row = rows;
con->col = cols;
con->x = workspaces[screen].x;
con->y = workspaces[screen].y;
con->width = (width / c_ws->cols) * con->colspan;
con->height = (height / c_ws->rows) * con->rowspan;
container->row = rows;
container->col = cols;
container->x = r_ws->rect.x;
container->y = r_ws->rect.y;
container->width = (width / r_ws->cols) * container->colspan;
container->height = (height / r_ws->rows) * container->rowspan;
/* Render it */
render_container(conn, CUR_TABLE[cols][rows]);
render_container(connection, container);
}
}
xcb_flush(conn);
xcb_flush(connection);
}

73
src/mainx.c
View File

@ -41,6 +41,7 @@
#include "handlers.h"
#include "util.h"
#include "xcb.h"
#include "xinerama.h"
#define TERMINAL "/usr/pkg/bin/urxvt"
@ -129,8 +130,8 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
new = calloc(sizeof(Client), 1);
/* We initialize x and y with the invalid coordinates -1 so that they will
get updated at the next render_layout() at any case */
new->x = -1;
new->y = -1;
new->rect.x = -1;
new->rect.y = -1;
}
uint32_t mask = 0;
uint32_t values[3];
@ -144,8 +145,8 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
new->frame = xcb_generate_id(conn);
new->child = child;
new->width = width;
new->height = height;
new->rect.width = width;
new->rect.height = height;
/* Don’t generate events for our new window, it should *not* be managed */
mask |= XCB_CW_OVERRIDE_REDIRECT;
@ -162,6 +163,9 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
i3Font *font = load_font(conn, pattern);
height = min(height, c_ws->rect.y + c_ws->rect.height);
width = min(width, c_ws->rect.x + c_ws->rect.width);
/* Yo dawg, I heard you like windows, so I create a window around your window… */
xcb_void_cookie_t cookie = xcb_create_window_checked(conn,
depth,
@ -176,6 +180,7 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
XCB_WINDOW_CLASS_COPY_FROM_PARENT,
mask,
values);
printf("x = %d, y = %d, width = %d, height = %d\n", x, y, width, height);
check_error(conn, cookie, "Could not create frame");
xcb_change_save_set(conn, XCB_SET_MODE_INSERT, child);
@ -210,7 +215,7 @@ void reparent_window(xcb_connection_t *conn, xcb_window_t child,
XCB_BUTTON_MASK_ANY /* don’t filter for any modifiers */);
/* Focus the new window */
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, new->child, XCB_CURRENT_TIME);
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, new->child, XCB_CURRENT_TIME);
render_layout(conn);
}
@ -244,44 +249,6 @@ void manage_existing_windows(xcb_connection_t *c, xcb_property_handlers_t *proph
free(rep);
}
static void initialize_xinerama(xcb_connection_t *conn) {
xcb_xinerama_query_screens_reply_t *reply;
xcb_xinerama_screen_info_t *screen_info;
int screen;
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
printf("Xinerama extension not found, disabling.\n");
return;
}
if (!xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL)->state) {
printf("Xinerama is not active (in your X-Server), disabling.\n");
return;
}
reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
/* TODO: error check */
screen_info = xcb_xinerama_query_screens_screen_info(reply);
num_screens = xcb_xinerama_query_screens_screen_info_length(reply);
/* Just go through each workspace and associate as many screens as we can. */
for (screen = 0; screen < num_screens; screen++) {
workspaces[screen].x = screen_info[screen].x_org;
workspaces[screen].y = screen_info[screen].y_org;
workspaces[screen].width = screen_info[screen].width;
workspaces[screen].height = screen_info[screen].height;
workspaces[screen].screen_num = screen;
printf("found Xinerama screen: %d x %d at %d x %d\n",
screen_info[screen].width, screen_info[screen].height,
screen_info[screen].x_org, screen_info[screen].y_org);
}
free(screen_info);
}
int main(int argc, char *argv[], char *env[]) {
int i, screens;
xcb_connection_t *c;
@ -355,7 +322,7 @@ int main(int argc, char *argv[], char *env[]) {
root_win = root;
uint32_t mask = XCB_CW_EVENT_MASK;
uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE };
uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_ENTER_WINDOW};
xcb_change_window_attributes(c, root, mask, values);
/* Setup NetWM atoms */
@ -442,6 +409,24 @@ int main(int argc, char *argv[], char *env[]) {
manage_existing_windows(c, &prophs, root);
/* Get pointer position to see on which screen we’re starting */
xcb_query_pointer_cookie_t pointer_cookie = xcb_query_pointer(c, root);
xcb_query_pointer_reply_t *reply = xcb_query_pointer_reply(c, pointer_cookie, NULL);
if (reply == NULL) {
printf("Could not get pointer position\n");
return 1;
}
i3Screen *screen = get_screen_containing(reply->root_x, reply->root_y);
if (screen == NULL) {
printf("ERROR: No such screen\n");
return 0;
}
if (screen->current_workspace != 0) {
printf("Ok, I need to go to the other workspace\n");
c_ws = &workspaces[screen->current_workspace];
}
xcb_event_wait_for_event_loop(&evenths);
/* not reached */

1
src/table.c
View File

@ -40,6 +40,7 @@ void init_table() {
memset(workspaces, 0, sizeof(workspaces));
for (i = 0; i < 10; i++) {
workspaces[i].screen = NULL;
expand_table_cols(&(workspaces[i]));
expand_table_rows(&(workspaces[i]));
}

36
src/util.c
View File

@ -19,6 +19,14 @@
#include "table.h"
#include "layout.h"
int min(int a, int b) {
return (a < b ? a : b);
}
int max(int a, int b) {
return (a > b ? a : b);
}
/*
* Starts the given application by passing it through a shell. We use double fork
* to avoid zombie processes. As the started application’s parent exits (immediately),
@ -70,6 +78,12 @@ void check_error(xcb_connection_t *connection, xcb_void_cookie_t cookie, char *e
*
*/
void set_focus(xcb_connection_t *conn, Client *client) {
/* TODO: check if the focus needs to be changed at all */
/* Store current_row/current_col */
c_ws->current_row = current_row;
c_ws->current_col = current_col;
c_ws = client->container->workspace;
/* Update container */
Client *old_client = client->container->currently_focused;
client->container->currently_focused = client;
@ -78,7 +92,8 @@ void set_focus(xcb_connection_t *conn, Client *client) {
current_row = client->container->row;
/* Set focus to the entered window, and flush xcb buffer immediately */
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_NONE, client->child, XCB_CURRENT_TIME);
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, client->child, XCB_CURRENT_TIME);
//xcb_warp_pointer(conn, XCB_NONE, client->child, 0, 0, 0, 0, 10, 10);
/* Update last/current client’s titlebar */
if (old_client != NULL)
decorate_window(conn, old_client);
@ -86,6 +101,17 @@ void set_focus(xcb_connection_t *conn, Client *client) {
xcb_flush(conn);
}
/*
* Warps the pointer into the given client (in the middle of it, to be specific), therefore
* selecting it
*
*/
void warp_pointer_into(xcb_connection_t *connection, Client *client) {
int mid_x = client->rect.width / 2,
mid_y = client->rect.height / 2;
xcb_warp_pointer(connection, XCB_NONE, client->child, 0, 0, 0, 0, mid_x, mid_y);
}
/*
* Toggles fullscreen mode for the given client. It updates the data structures and
* reconfigures (= resizes/moves) the client and its frame to the full size of the
@ -106,10 +132,10 @@ void toggle_fullscreen(xcb_connection_t *conn, Client *client) {
XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH |
XCB_CONFIG_WINDOW_HEIGHT;
uint32_t values[4] = {workspace->x,
workspace->y,
workspace->width,
workspace->height};
uint32_t values[4] = {workspace->rect.x,
workspace->rect.y,
workspace->rect.width,
workspace->rect.height};
printf("child itself will be at %dx%d with size %dx%d\n",
values[0], values[1], values[2], values[3]);

113
src/xinerama.c Normal file
View File

@ -0,0 +1,113 @@
/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* (c) 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
#include "queue.h"
#include "i3.h"
#include "data.h"
#include "table.h"
#include "util.h"
#include "xinerama.h"
/* This TAILQ of Rects stores the virtual screens, used for handling overlapping screens
* (xrandr --same-as) */
struct screens_head virtual_screens;
i3Screen *get_screen_at(int x, int y) {
i3Screen *screen;
TAILQ_FOREACH(screen, &virtual_screens, screens)
if (screen->rect.x == x && screen->rect.y == y)
return screen;
return NULL;
}
i3Screen *get_screen_containing(int x, int y) {
i3Screen *screen;
TAILQ_FOREACH(screen, &virtual_screens, screens)
if (x > screen->rect.x && x < (screen->rect.x + screen->rect.width) &&
y > screen->rect.y && y < (screen->rect.y + screen->rect.height))
return screen;
return NULL;
}
/*
* We have just established a connection to the X server and need the initial Xinerama
* information to setup workspaces for each screen.
*
*/
void initialize_xinerama(xcb_connection_t *conn) {
xcb_xinerama_query_screens_reply_t *reply;
xcb_xinerama_screen_info_t *screen_info;
int screen;
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
printf("Xinerama extension not found, disabling.\n");
return;
}
if (!xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL)->state) {
printf("Xinerama is not active (in your X-Server), disabling.\n");
return;
}
reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
if (!reply) {
printf("Couldn’t get active Xinerama screens\n");
return;
}
screen_info = xcb_xinerama_query_screens_screen_info(reply);
num_screens = xcb_xinerama_query_screens_screen_info_length(reply);
TAILQ_INIT(&virtual_screens);
/* Just go through each workspace and associate as many screens as we can. */
for (screen = 0; screen < num_screens; screen++) {
i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org);
if (s!= NULL) {
/* This screen already exists. We use the littlest screen so that the user
can always see the complete workspace */
s->rect.width = min(s->rect.width, screen_info[screen].width);
s->rect.height = min(s->rect.height, screen_info[screen].height);
} else {
s = calloc(sizeof(Screen), 1);
s->rect.x = screen_info[screen].x_org;
s->rect.y = screen_info[screen].y_org;
s->rect.width = screen_info[screen].width;
s->rect.height = screen_info[screen].height;
TAILQ_INSERT_TAIL(&virtual_screens, s, screens);
}
printf("found Xinerama screen: %d x %d at %d x %d\n",
screen_info[screen].width, screen_info[screen].height,
screen_info[screen].x_org, screen_info[screen].y_org);
}
i3Screen *s;
num_screens = 0;
TAILQ_FOREACH(s, &virtual_screens, screens) {
s->num = num_screens;
s->current_workspace = num_screens;
workspaces[num_screens].screen = s;
memcpy(&(workspaces[num_screens++].rect), &(s->rect), sizeof(Rect));
printf("that is virtual screen at %d x %d with %d x %d\n",
s->rect.x, s->rect.y, s->rect.width, s->rect.height);
}
free(screen_info);
}