#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <time.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
#include "table.h"
#include "util.h"
#include "xinerama.h"
+#include "layout.h"
+#include "xcb.h"
+#include "config.h"
+#include "workspace.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;
+
+/*
+ * Returns true if both screen objects describe the same screen (checks their
+ * size and position).
+ *
+ */
+bool screens_are_equal(i3Screen *screen1, i3Screen *screen2) {
+ /* If one of both objects (or both) are NULL, we cannot compare them */
+ if (screen1 == NULL || screen2 == NULL)
+ return false;
+
+ /* If the pointers are equal, take the short-circuit */
+ if (screen1 == screen2)
+ return true;
+
+ /* Compare their size - other properties are not relevant to determine
+ * if a screen is equal to another one */
+ return (memcmp(&(screen1->rect), &(screen2->rect), sizeof(Rect)) == 0);
+}
/*
* 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;
*/
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) {
+ LOG("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;
}
+/*
+ * Gets the screen which is the last one in the given direction, for example the screen
+ * on the most bottom when direction == D_DOWN, the screen most right when direction == D_RIGHT
+ * and so on.
+ *
+ * This function always returns a screen.
+ *
+ */
+i3Screen *get_screen_most(direction_t direction) {
+ i3Screen *screen, *candidate = NULL;
+ int position = 0;
+ TAILQ_FOREACH(screen, virtual_screens, screens) {
+ /* Repeated calls of WIN determine the winner of the comparison */
+ #define WIN(variable, condition) \
+ if (variable condition) { \
+ candidate = screen; \
+ position = variable; \
+ } \
+ break;
+
+ switch (direction) {
+ case D_UP:
+ WIN(screen->rect.y, <= position);
+ case D_DOWN:
+ WIN(screen->rect.y, >= position);
+ case D_LEFT:
+ WIN(screen->rect.x, <= position);
+ case D_RIGHT:
+ WIN(screen->rect.x, >= position);
+ }
+ }
+
+ assert(candidate != NULL);
+
+ return candidate;
+}
+
+static void initialize_screen(xcb_connection_t *conn, i3Screen *screen, Workspace *workspace) {
+ i3Font *font = load_font(conn, config.font);
+
+ workspace->screen = screen;
+ screen->current_workspace = workspace->num;
+
+ /* Create a bar for each screen */
+ Rect bar_rect = {screen->rect.x,
+ screen->rect.height - (font->height + 6),
+ screen->rect.x + screen->rect.width,
+ font->height + 6};
+ uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
+ uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
+ screen->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values);
+ screen->bargc = xcb_generate_id(conn);
+ xcb_create_gc(conn, screen->bargc, screen->bar, 0, 0);
+
+ SLIST_INIT(&(screen->dock_clients));
+
+ LOG("that is virtual screen at %d x %d with %d x %d\n",
+ screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
+}
+
/*
* Fills virtual_screens with exactly one screen with width/height of the whole X server.
*
*/
-static void disable_xinerama(xcb_connection_t *connection) {
- xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(connection)).data;
+static void disable_xinerama(xcb_connection_t *conn) {
+ xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
i3Screen *s = calloc(sizeof(i3Screen), 1);
s->rect.width = root_screen->width_in_pixels;
s->rect.height = root_screen->height_in_pixels;
- TAILQ_INSERT_TAIL(&virtual_screens, s, screens);
+ num_screens = 1;
+ s->num = 0;
+ initialize_screen(conn, s, &(workspaces[0]));
+
+ TAILQ_INSERT_TAIL(virtual_screens, s, screens);
+
+ xinerama_enabled = false;
+}
+
+/*
+ * 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
+ *
+ */
+static void query_screens(xcb_connection_t *conn, struct screens_head *screenlist) {
+ xcb_xinerama_query_screens_reply_t *reply;
+ xcb_xinerama_screen_info_t *screen_info;
+ time_t before_trying = time(NULL);
+
+ /* Try repeatedly to find screens (there might be short timeframes in
+ * which the X server does not return any screens, such as when rotating
+ * screens), but not longer than 5 seconds (strictly speaking, only four
+ * seconds of trying are guaranteed due to the 1-second-resolution) */
+ while ((time(NULL) - before_trying) < 5) {
+ reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
+ if (!reply) {
+ LOG("Couldn't get Xinerama screens\n");
+ return;
+ }
+ screen_info = xcb_xinerama_query_screens_screen_info(reply);
+ int screens = xcb_xinerama_query_screens_screen_info_length(reply);
+ num_screens = 0;
+
+ 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 */
+ 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(i3Screen), 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;
+ /* 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++;
+ }
+
+ LOG("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(reply);
+
+ if (num_screens == 0) {
+ LOG("No screens found. This is weird. Trying again...\n");
+ continue;
+ }
+
+ break;
+ }
}
/*
*
*/
void initialize_xinerama(xcb_connection_t *conn) {
- xcb_xinerama_query_screens_reply_t *reply;
- xcb_xinerama_screen_info_t *screen_info;
+ virtual_screens = scalloc(sizeof(struct screens_head));
+ TAILQ_INIT(virtual_screens);
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
- printf("Xinerama extension not found, disabling.\n");
+ LOG("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");
+ xcb_xinerama_is_active_reply_t *reply;
+ reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL);
+
+ if (reply == NULL || !reply->state) {
+ LOG("Xinerama is not active (in your X-Server), disabling.\n");
disable_xinerama(conn);
- return;
+ } else
+ query_screens(conn, virtual_screens);
+
+ FREE(reply);
+
+ i3Screen *screen;
+ num_screens = 0;
+ /* Just go through each workspace and associate as many screens as we can. */
+ TAILQ_FOREACH(screen, virtual_screens, screens) {
+ screen->num = num_screens;
+ num_screens++;
+ Workspace *ws = get_first_workspace_for_screen(virtual_screens, screen);
+ initialize_screen(conn, screen, ws);
}
+}
- reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
- if (!reply) {
- printf("Couldn’t get active Xinerama screens\n");
+/*
+ * 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 *conn) {
+ i3Font *font = load_font(conn, config.font);
+
+ /* 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) {
+ LOG("Xinerama is disabled\n");
return;
}
- 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 (int 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(i3Screen), 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);
+ /* 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(conn, new_screens);
+
+ i3Screen *first = TAILQ_FIRST(new_screens),
+ *screen,
+ *old_screen;
+ int screen_count = 0;
+ /* Mark each workspace which currently is assigned to a screen, so we
+ * can garbage-collect afterwards */
+ for (int c = 0; c < 10; c++)
+ workspaces[c].reassigned = (workspaces[c].screen == NULL);
+
+ TAILQ_FOREACH(screen, new_screens, screens) {
+ screen->num = screen_count;
+ screen->current_workspace = -1;
+
+ TAILQ_FOREACH(old_screen, virtual_screens, screens) {
+ if (old_screen->num != screen_count)
+ continue;
+
+ LOG("Found a matching screen\n");
+ /* Use the same workspace */
+ screen->current_workspace = old_screen->current_workspace;
+
+ /* Re-use the old bar window */
+ screen->bar = old_screen->bar;
+ screen->bargc = old_screen->bargc;
+ LOG("old_screen->bar = %p\n", old_screen->bar);
+
+ Rect bar_rect = {screen->rect.x,
+ screen->rect.height - (font->height + 6),
+ screen->rect.x + screen->rect.width,
+ font->height + 6};
+
+ LOG("configuring bar to be at %d x %d with %d x %d\n",
+ bar_rect.x, bar_rect.y, bar_rect.height, bar_rect.width);
+ xcb_configure_window(conn, screen->bar, XCB_CONFIG_WINDOW_X |
+ XCB_CONFIG_WINDOW_Y |
+ XCB_CONFIG_WINDOW_WIDTH |
+ XCB_CONFIG_WINDOW_HEIGHT, &(bar_rect.x));
+
+ /* Copy the list head for the dock clients */
+ screen->dock_clients = old_screen->dock_clients;
+
+ /* Update the dimensions */
+ for (int c = 0; c < 10; c++) {
+ Workspace *ws = &(workspaces[c]);
+ if (ws->screen != old_screen)
+ continue;
+
+ LOG("re-assigning ws %d\n", ws->num);
+ memcpy(&(ws->rect), &(screen->rect), sizeof(Rect));
+ ws->screen = screen;
+ ws->reassigned = true;
+ }
+
+ break;
}
+ if (screen->current_workspace == -1) {
+ /* Find the first unused workspace, preferring the ones
+ * which are assigned to this screen and initialize
+ * the screen with it. */
+ LOG("getting first ws for screen %p\n", screen);
+ Workspace *ws = get_first_workspace_for_screen(new_screens, screen);
+ initialize_screen(conn, screen, ws);
- 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);
+ /* As this workspace just got visible (we got a new screen
+ * without workspace), we need to map its clients */
+ workspace_map_clients(conn, ws);
+ }
+ screen_count++;
}
- 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);
+ /* Check for workspaces which are out of bounds */
+ for (int c = 0; c < 10; c++) {
+ if (workspaces[c].reassigned)
+ continue;
+
+ /* f_ws is a shortcut to the workspace to fix */
+ Workspace *f_ws = &(workspaces[c]);
+ Client *client;
+
+ LOG("Closing bar window (%p)\n", f_ws->screen->bar);
+ xcb_destroy_window(conn, f_ws->screen->bar);
+
+ LOG("Workspace %d's screen out of bounds, assigning to first screen\n", c+1);
+ f_ws->screen = first;
+ memcpy(&(f_ws->rect), &(first->rect), sizeof(Rect));
+
+ /* Force reconfiguration for each client on that workspace */
+ FOR_TABLE(f_ws)
+ CIRCLEQ_FOREACH(client, &(f_ws->table[cols][rows]->clients), clients)
+ client->force_reconfigure = true;
+
+ /* Render the workspace to reconfigure the clients. However, they will be visible now, so… */
+ render_workspace(conn, first, f_ws);
+
+ /* …unless we want to see them at the moment, we should hide that workspace */
+ if (workspace_is_visible(f_ws))
+ continue;
+
+ workspace_unmap_clients(conn, f_ws);
+
+ if (c_ws == f_ws) {
+ LOG("Need to adjust c_ws...\n");
+ c_ws = &(workspaces[first->current_workspace]);
+ }
+ }
+ xcb_flush(conn);
+
+ /* Free the old list */
+ while (!TAILQ_EMPTY(virtual_screens)) {
+ screen = TAILQ_FIRST(virtual_screens);
+ TAILQ_REMOVE(virtual_screens, screen, screens);
+ free(screen);
}
+ free(virtual_screens);
+
+ virtual_screens = new_screens;
+
+ LOG("Current workspace is now: %d\n", first->current_workspace);
- free(reply);
+ render_layout(conn);
}