Changeset 28ca31ed in mainline for uspace/lib/ui/src/list.c

Timestamp:

2024-02-13T20:13:48Z (3 months ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

10657856

Parents:

242e3c3

Message:

Moving start menu entry up and down

File:

• uspace/lib/ui/src/list.c (modified) (2 diffs)

uspace/lib/ui/src/list.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2023 Jiri Svoboda
+ * Copyright (c) 2024 Jiri Svoboda
  * All rights reserved.
  *
@@ -711 +711 @@
 }
 
+/** Move UI list entry one position up.
+ *
+ * @parm entry UI list entry
+ */
+void ui_list_entry_move_up(ui_list_entry_t *entry)
+{
+        ui_list_t *list = entry->list;
+        ui_list_entry_t *prev;
+
+        prev = ui_list_prev(entry);
+        if (prev == NULL) {
+                /* Entry is already on first position, nothing to do. */
+                return;
+        }
+
+        list_remove(&entry->lentries);
+        list_insert_before(&entry->lentries, &prev->lentries);
+
+        /* Make sure page stays on the same position/idx as it was before */
+        if (list->page == entry) {
+                list->page = prev;
+        } else if (list->page == prev) {
+                list->page = entry;
+        }
+
+        /*
+         * Return cursor to the same position/idx as it was before,
+         * but then move it using ui_list_cursor_move() to the new
+         * position (this ensures scrolling when needed).
+         */
+        if (list->cursor == entry) {
+                list->cursor = prev;
+                ui_list_cursor_move(list, entry, list->cursor_idx - 1);
+        } else if (list->cursor == prev) {
+                list->cursor = entry;
+                ui_list_cursor_move(list, prev, list->cursor_idx + 1);
+        }
+}
+
+/** Move UI list entry one position down.
+ *
+ * @parm entry UI list entry
+ */
+void ui_list_entry_move_down(ui_list_entry_t *entry)
+{
+        ui_list_t *list = entry->list;
+        ui_list_entry_t *next;
+
+        next = ui_list_next(entry);
+        if (next == NULL) {
+                /* Entry is already on last position, nothing to do. */
+                return;
+        }
+
+        list_remove(&entry->lentries);
+        list_insert_after(&entry->lentries, &next->lentries);
+
+        /* Make sure page stays on the same position/idx as it was before */
+        if (list->page == entry) {
+                list->page = next;
+        } else if (list->page == next) {
+                list->page = entry;
+        }
+
+        /*
+         * Return cursor to the same position/idx as it was before,
+         * but then move it using ui_list_cursor_move() to the new
+         * position (this ensures scrolling when needed).
+         */
+        if (list->cursor == entry) {
+                list->cursor = next;
+                ui_list_cursor_move(list, entry, list->cursor_idx + 1);
+        } else if (list->cursor == next) {
+                list->cursor = entry;
+                ui_list_cursor_move(list, next, list->cursor_idx - 1);
+        }
+}
+
 /** Destroy UI list entry.
  *