-void ewmh_update_workarea() {
- int num_workspaces = 0, count = 0;
- Rect last_rect = {0, 0, 0, 0};
- Con *output;
-
- TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
- Con *ws;
- TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
- /* Check if we need to initialize last_rect. The case that the
- * first workspace is all-zero may happen when the user
- * assigned workspace 2 for his first screen, for example. Thus
- * we need an initialized last_rect in the very first run of
- * the following loop. */
- if (last_rect.width == 0 && last_rect.height == 0 &&
- ws->rect.width != 0 && ws->rect.height != 0) {
- memcpy(&last_rect, &(ws->rect), sizeof(Rect));
- }
- num_workspaces++;
- }
- }
-
- DLOG("Got %d workspaces\n", num_workspaces);
- uint8_t *workarea = smalloc(sizeof(Rect) * num_workspaces);
- TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
- Con *ws;
- TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
- DLOG("storing %d: %dx%d with %d x %d\n", count, ws->rect.x,
- ws->rect.y, ws->rect.width, ws->rect.height);
- /* If a workspace is not yet initialized and thus its
- * dimensions are zero, we will instead put the dimensions
- * of the last workspace in the list. For example firefox
- * intersects all workspaces and does not cope so well with
- * an all-zero workspace. */
- if (ws->rect.width == 0 || ws->rect.height == 0) {
- DLOG("re-using last_rect (%dx%d, %d, %d)\n",
- last_rect.x, last_rect.y, last_rect.width,
- last_rect.height);
- memcpy(workarea + (sizeof(Rect) * count++), &last_rect, sizeof(Rect));
- continue;
- }
- memcpy(workarea + (sizeof(Rect) * count++), &(ws->rect), sizeof(Rect));
- memcpy(&last_rect, &(ws->rect), sizeof(Rect));
- }
- }
- xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
- A__NET_WORKAREA, A_CARDINAL, 32,
- num_workspaces * (sizeof(Rect) / sizeof(uint32_t)),
- workarea);
- free(workarea);
- xcb_flush(conn);