Changes in uspace/lib/ui/src/list.c [28ca31ed:f6304727] in mainline

File:

• uspace/lib/ui/src/list.c (modified) (3 diffs)

uspace/lib/ui/src/list.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2024 Jiri Svoboda
+ * Copyright (c) 2026 Jiri Svoboda
  * All rights reserved.
  *
@@ -471 +471 @@
         ui_list_scrollbar_rect(list, &srect);
         ui_scrollbar_set_rect(list->scrollbar, &srect);
+
+        /* Make sure cursor stays on page after resize. */
+        if (list->cursor != NULL)
+                ui_list_cursor_move(list, list->cursor, list->cursor_idx);
 }
 
@@ -1652 +1656 @@
 }
 
+/** Save list position for later.
+ *
+ * The position will be valid even if the list is cleaned and re-populated
+ * (it just counts position from the top.)
+ *
+ * @param list UI list
+ * @param pos Place to store position
+ */
+void ui_list_save_pos(ui_list_t *list, ui_list_pos_t *pos)
+{
+        pos->page_idx = list->page_idx;
+        pos->cursor_idx = list->cursor_idx;
+}
+
+/** Restore saved list position.
+ *
+ * The position will be valid even if the list is cleaned and re-populated
+ * (it just counts position from the top.)
+ *
+ * @param list UI list
+ * @param pos Saved list position
+ */
+void ui_list_restore_pos(ui_list_t *list, ui_list_pos_t *pos)
+{
+        size_t idx, i;
+        ui_list_entry_t *entry, *next;
+
+        idx = 0;
+        entry = ui_list_first(list);
+
+        for (i = 0; i < pos->cursor_idx; i++) {
+                next = ui_list_next(entry);
+                if (next != NULL) {
+                        entry = next;
+                        ++idx;
+                }
+        }
+
+        list->cursor = entry;
+        list->cursor_idx = idx;
+
+        idx = 0;
+        entry = ui_list_first(list);
+
+        for (i = 0; i < pos->page_idx; i++) {
+                next = ui_list_next(entry);
+                if (next != NULL) {
+                        entry = next;
+                        ++idx;
+                }
+        }
+
+        list->page = entry;
+        list->page_idx = idx;
+}
+
 /** @}
  */