+ menuitem->userdata = userdata;
+ return 0;
+}
+
+
+int
+swap_item(Menu* menu, int src_index, int dest_index)
+{
+ ar_swap_item((void**)menu->menu_items, src_index, dest_index);
+
+ return 0;
+}
+
+int
+delete_item(Menu* menu, int index)
+{
+ if (index < 0 || index > menu->menu_length-1) return -1;
+
+ for (int i = index; i <= menu->menu_length-1; i++) {
+ menu->menu_items[i] = menu->menu_items[i+1];
+ }
+
+ menu->menu_items = realloc(menu->menu_items, menu->menu_length*sizeof(MenuItem*));
+ menu->menu_items[menu->menu_length-1] = 0; // preserve null at end
+
+ menu->menu_length -= 1;
+
+ /* also move the current selected position if it's last */
+ if (menu->selected_item > menu->menu_length-1) {
+ menu->selected_item = menu->menu_length-1;
+ }
+
+ return 0;
+}
+
+int
+insert_item(Menu* menu, MenuItem* menuitem, int index)
+{ // note, this func does not validate index
+
+ /* resize array and insert */
+ menu->menu_items = realloc(menu->menu_items, (menu->menu_length+2)*sizeof(MenuItem*));
+
+ for (int i = menu->menu_length; i > index; i--) {
+ menu->menu_items[i] = menu->menu_items[i-1];
+ }
+
+ menu->menu_items[index] = menuitem;
+ menu->menu_items[menu->menu_length+1] = 0; // remember null at end
+ menu->menu_length += 1;
+
+ /* move cursor pos */
+ menu->selected_item = index;
+
+ return 0;
+}
+
+int
+menu_insert_mode(Menu* menu, int insert_index)
+{
+ char temp[MAX_CONTENTS_LENGTH+1]; // remember null
+ char* new_contents;
+ int insert_pos;
+
+ curs_on();
+
+ // account for multiline items
+ insert_pos = menu->scroll_offset;
+ for (int i = 0; i < insert_index; i++) {
+ insert_pos += menu->item_height(menu->menu_items[i]);
+ }
+
+ /* move cursor to right spot */
+ ungetstr(menu->menu_items[insert_index]->title);
+ mvwgetnstr(menu->menu_win,
+ insert_pos,
+ 0,
+ temp,
+ MAX_CONTENTS_LENGTH
+ );
+ curs_off();
+
+ /* copy out */
+ new_contents = strdup(temp);
+ menu->menu_items[insert_index]->title = new_contents;
+
+ /* delete if empty - maybe move this to a cleanup stage */
+ if (strlen(new_contents) == 0) {
+ delete_item(menu, insert_index);
+ }
+
+ return 0;
+}
+
+int
+menu_driver(Menu* menu, MenuAction action)
+{
+
+ switch (action) {
+ case MENU_UP:
+ menu->selected_item = menu->selected_item-1 >= 0 ? menu->selected_item-1 : 0;
+ break;
+
+ case MENU_DOWN:
+ menu->selected_item = menu->selected_item+1 <= menu->menu_length-1 ? menu->selected_item+1 : menu->menu_length-1;
+ break;
+
+ case MENU_TOP:
+ menu->selected_item = 0;
+ break;
+
+ case MENU_BOTTOM:
+ menu->selected_item = menu->menu_length-1;
+ break;
+
+ case MENU_MOVE_UP:
+ if (menu->selected_item <= 0) break;
+ swap_item(menu, menu->selected_item, menu->selected_item-1);
+ menu->selected_item -= 1;
+ break;
+
+ case MENU_MOVE_DOWN:
+ if (menu->selected_item >= menu->menu_length-1) break;
+ swap_item(menu, menu->selected_item, menu->selected_item+1);
+ menu->selected_item += 1;
+ break;
+
+ case MENU_DELETE:
+ delete_item(menu, menu->selected_item);
+ break;
+
+ case MENU_APPEND:
+ insert_item(menu, create_blank_menuitem(), menu->menu_length);
+ render_menu(menu); // refresh after inserting
+ menu_insert_mode(menu, menu->selected_item);
+ break;
+
+ case MENU_INSERT_ABOVE:
+ insert_item(menu, create_blank_menuitem(), menu->selected_item);
+ render_menu(menu);
+ menu_insert_mode(menu, menu->selected_item);
+ break;
+
+ case MENU_INSERT_BELOW:
+ insert_item(menu, create_blank_menuitem(), menu->selected_item+1);
+ render_menu(menu);
+ menu_insert_mode(menu, menu->selected_item); // inserted item is cur now
+ break;
+
+ case MENU_EDIT:
+ menu_insert_mode(menu, menu->selected_item);
+ break;
+
+ default: // This is here for debug, disable later
+ fprintf(stderr, "Invalid menu action");
+ }
+
+ return 0;
+}
+
+int
+render_menu(Menu* menu)
+{
+ wclear(menu->menu_win);
+
+ /* calculate scroll */
+ int visible;
+
+ visible = items_visible(menu, menu->scroll_offset);
+
+ if (menu->selected_item >= menu->scroll_offset+visible) {
+ menu->scroll_offset = clamp(
+ menu->selected_item-items_visible_rev(menu, menu->selected_item)+1,
+ 0,
+ floorzero(menu->menu_length-1)
+ );
+
+ } else if (menu->selected_item < menu->scroll_offset) {
+ menu->scroll_offset = clamp(
+ menu->selected_item,
+ 0,
+ floorzero(menu->menu_length-1)
+ );
+ }
+
+ /* render menu items */
+ int curline = 0;
+ for (int i = menu->scroll_offset; i < menu->menu_length; i++) {
+ menu->render_item(menu, i, curline);
+ curline += menu->item_height(menu->menu_items[i]);
+ }
+
+ wrefresh(menu->menu_win);
+
+ return 0;
+}
+
+void
+default_render_item(Menu* menu, int item_index, int start_y)
+{
+ MenuItem* curitem;
+ int hlcolor;
+
+ curitem = menu->menu_items[item_index];
+
+ /* color selected item */
+ hlcolor = COLOR_PAIR((item_index == menu->selected_item && menu->focused == true) ? TS_SELECTED : TS_NONSELECTED);
+ wattron(menu->menu_win, hlcolor);
+ mvwprintw(menu->menu_win, start_y, 0, curitem->title);
+ wattroff(menu->menu_win, hlcolor);
+}
+
+
+int
+default_item_height(MenuItem* menuitem)
+{
+ return 1; // maybe account for line wrap by default