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Implement Xinerama screen changes

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This commit is contained in:
Michael Stapelberg
2009-03-03 23:51:02 +01:00
parent 1157229888
commit 3b50615a71
6 changed files with 161 additions and 43 deletions
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169
src/xinerama.c
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@ -11,6 +11,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
@ -21,18 +22,21 @@
#include "table.h"
#include "util.h"
#include "xinerama.h"
#include "layout.h"
/* This TAILQ of i3Screens stores the virtual screens, used for handling overlapping screens
* (xrandr --same-as) */
struct screens_head virtual_screens = TAILQ_HEAD_INITIALIZER(virtual_screens);
struct screens_head *virtual_screens;
static bool xinerama_enabled = true;
/*
* Looks in virtual_screens for the i3Screen whose start coordinates are x, y
*
*/
i3Screen *get_screen_at(int x, int y) {
i3Screen *get_screen_at(int x, int y, struct screens_head *screenlist) {
i3Screen *screen;
TAILQ_FOREACH(screen, &virtual_screens, screens)
TAILQ_FOREACH(screen, screenlist, screens)
if (screen->rect.x == x && screen->rect.y == y)
return screen;
@ -45,10 +49,13 @@ i3Screen *get_screen_at(int x, int y) {
*/
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))
TAILQ_FOREACH(screen, virtual_screens, screens) {
printf("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
x, y, screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
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;
}
@ -67,41 +74,31 @@ static void disable_xinerama(xcb_connection_t *connection) {
s->rect.width = root_screen->width_in_pixels;
s->rect.height = root_screen->height_in_pixels;
TAILQ_INSERT_TAIL(&virtual_screens, s, screens);
TAILQ_INSERT_TAIL(virtual_screens, s, screens);
xinerama_enabled = false;
}
/*
* We have just established a connection to the X server and need the initial Xinerama
* information to setup workspaces for each screen.
* Gets the Xinerama screens and converts them to virtual i3Screens (only one screen for two
* Xinerama screen which are configured in clone mode) in the given screenlist
*
*/
void initialize_xinerama(xcb_connection_t *conn) {
static void query_screens(xcb_connection_t *connection, struct screens_head *screenlist) {
xcb_xinerama_query_screens_reply_t *reply;
xcb_xinerama_screen_info_t *screen_info;
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
printf("Xinerama extension not found, disabling.\n");
disable_xinerama(conn);
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");
disable_xinerama(conn);
return;
}
reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
reply = xcb_xinerama_query_screens_reply(connection, xcb_xinerama_query_screens_unchecked(connection), NULL);
if (!reply) {
printf("Couldn’t get active Xinerama screens\n");
printf("Couldn't get Xinerama screens\n");
return;
}
screen_info = xcb_xinerama_query_screens_screen_info(reply);
num_screens = xcb_xinerama_query_screens_screen_info_length(reply);
int screens = xcb_xinerama_query_screens_screen_info_length(reply);
num_screens = 0;
/* Just go through each workspace and associate as many screens as we can. */
for (int screen = 0; screen < num_screens; screen++) {
i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org);
for (int screen = 0; screen < screens; screen++) {
i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org, screenlist);
if (s!= NULL) {
/* This screen already exists. We use the littlest screen so that the user
can always see the complete workspace */
@ -113,7 +110,11 @@ void initialize_xinerama(xcb_connection_t *conn) {
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);
/* We always treat the screen at 0x0 as the primary screen */
if (s->rect.x == 0 && s->rect.y == 0)
TAILQ_INSERT_HEAD(screenlist, s, screens);
else TAILQ_INSERT_TAIL(screenlist, s, screens);
num_screens++;
}
printf("found Xinerama screen: %d x %d at %d x %d\n",
@ -121,9 +122,36 @@ void initialize_xinerama(xcb_connection_t *conn) {
screen_info[screen].x_org, screen_info[screen].y_org);
}
free(reply);
}
/*
* 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 *connection) {
virtual_screens = scalloc(sizeof(struct screens_head));
TAILQ_INIT(virtual_screens);
if (!xcb_get_extension_data(connection, &xcb_xinerama_id)->present) {
printf("Xinerama extension not found, disabling.\n");
disable_xinerama(connection);
return;
}
if (!xcb_xinerama_is_active_reply(connection, xcb_xinerama_is_active(connection), NULL)->state) {
printf("Xinerama is not active (in your X-Server), disabling.\n");
disable_xinerama(connection);
return;
}
query_screens(connection, virtual_screens);
i3Screen *s;
num_screens = 0;
TAILQ_FOREACH(s, &virtual_screens, screens) {
/* Just go through each workspace and associate as many screens as we can. */
TAILQ_FOREACH(s, virtual_screens, screens) {
s->num = num_screens;
s->current_workspace = num_screens;
workspaces[num_screens].screen = s;
@ -131,6 +159,83 @@ void initialize_xinerama(xcb_connection_t *conn) {
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(reply);
}
/*
* This is called when the rootwindow receives a configure_notify event and therefore the
* number/position of the Xinerama screens could have changed.
*
*/
void xinerama_requery_screens(xcb_connection_t *connection) {
/* POSSIBLE PROBLEM: Is the order of the Xinerama screens always constant? That is, can
it change when I move the --right-of video projector to --left-of? */
if (!xinerama_enabled) {
printf("Xinerama is disabled\n");
return;
}
/* We use a separate copy to diff with the previous set of screens */
struct screens_head *new_screens = scalloc(sizeof(struct screens_head));
TAILQ_INIT(new_screens);
query_screens(connection, new_screens);
i3Screen *first = TAILQ_FIRST(new_screens),
*screen;
int screen_count = 0;
TAILQ_FOREACH(screen, new_screens, screens) {
screen->num = screen_count;
screen->current_workspace = -1;
for (int c = 0; c < 10; c++)
if ((workspaces[c].screen != NULL) &&
(workspaces[c].screen->num == screen_count)) {
printf("Found a matching screen\n");
/* Try to use the same workspace, if it’s available */
if (workspaces[c].screen->current_workspace)
screen->current_workspace = workspaces[c].screen->current_workspace;
if (screen->current_workspace == -1)
screen->current_workspace = c;
/* Update the dimensions */
memcpy(&(workspaces[c].rect), &(screen->rect), sizeof(Rect));
workspaces[c].screen = screen;
}
if (screen->current_workspace == -1) {
/* Create a new workspace for this screen, it’s new */
for (int c = 0; c < 10; c++)
if (workspaces[c].screen == NULL) {
printf("fix: initializing new workspace, setting num to %d\n", c);
workspaces[c].screen = screen;
screen->current_workspace = c;
/* Copy the dimensions from the virtual screen */
memcpy(&(workspaces[c].rect), &(screen->rect), sizeof(Rect));
break;
}
}
screen_count++;
}
/* Check for workspaces which are out of bounds */
for (int c = 0; c < 10; c++)
if ((workspaces[c].screen != NULL) &&
(workspaces[c].screen->num >= num_screens)) {
printf("Workspace %d's screen out of bounds, assigning to first screen\n", c+1);
workspaces[c].screen = first;
memcpy(&(workspaces[c].rect), &(first->rect), sizeof(Rect));
}
/* Free the old list */
TAILQ_FOREACH(screen, virtual_screens, screens) {
TAILQ_REMOVE(virtual_screens, screen, screens);
free(screen);
}
free(virtual_screens);
virtual_screens = new_screens;
printf("Current workspace is now: %d\n", first->current_workspace);
render_layout(connection);
}