+static gboolean screen_validate_layout(ObDesktopLayout *l)
+{
+ if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
+ return FALSE;
+
+ /* fill in a zero rows/columns */
+ if (l->columns == 0) {
+ l->columns = screen_num_desktops / l->rows;
+ if (l->rows * l->columns < screen_num_desktops)
+ l->columns++;
+ if (l->rows * l->columns >= screen_num_desktops + l->columns)
+ l->rows--;
+ } else if (l->rows == 0) {
+ l->rows = screen_num_desktops / l->columns;
+ if (l->columns * l->rows < screen_num_desktops)
+ l->rows++;
+ if (l->columns * l->rows >= screen_num_desktops + l->rows)
+ l->columns--;
+ }
+
+ /* bounds checking */
+ if (l->orientation == OB_ORIENTATION_HORZ) {
+ l->columns = MIN(screen_num_desktops, l->columns);
+ l->rows = MIN(l->rows,
+ (screen_num_desktops + l->columns - 1) / l->columns);
+ l->columns = screen_num_desktops / l->rows +
+ !!(screen_num_desktops % l->rows);
+ } else {
+ l->rows = MIN(screen_num_desktops, l->rows);
+ l->columns = MIN(l->columns,
+ (screen_num_desktops + l->rows - 1) / l->rows);
+ l->rows = screen_num_desktops / l->columns +
+ !!(screen_num_desktops % l->columns);
+ }
+ return TRUE;
+}
+