scripts/kconfig/lxdialog/menubox.c

Source file repositories/reference/linux-study-clean/scripts/kconfig/lxdialog/menubox.c

File Facts

System
Linux kernel
Corpus path
scripts/kconfig/lxdialog/menubox.c
Extension
.c
Size
10423 bytes
Lines
417
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (key == KEY_UP || key == '-') {
				if (choice < 2 && scroll) {
					/* Scroll menu down */
					do_scroll(menu, &scroll, -1);

					print_item(scroll, 0, FALSE);
				} else
					choice = MAX(choice - 1, 0);

			} else if (key == KEY_DOWN || key == '+') {
				print_item(scroll+choice, choice, FALSE);

				if ((choice > max_choice - 3) &&
				    (scroll + max_choice < item_count())) {
					/* Scroll menu up */
					do_scroll(menu, &scroll, 1);

					print_item(scroll+max_choice - 1,
						   max_choice - 1, FALSE);
				} else
					choice = MIN(choice + 1, max_choice - 1);

			} else if (key == KEY_PPAGE) {
				scrollok(menu, TRUE);
				for (i = 0; (i < max_choice); i++) {
					if (scroll > 0) {
						do_scroll(menu, &scroll, -1);
						print_item(scroll, 0, FALSE);
					} else {
						if (choice > 0)
							choice--;
					}
				}

			} else if (key == KEY_NPAGE) {
				for (i = 0; (i < max_choice); i++) {
					if (scroll + max_choice < item_count()) {
						do_scroll(menu, &scroll, 1);
						print_item(scroll+max_choice-1,
							   max_choice - 1, FALSE);
					} else {
						if (choice + 1 < max_choice)
							choice++;
					}
				}
			} else
				choice = i;

			print_item(scroll + choice, choice, TRUE);

			print_arrows(dialog, item_count(), scroll,
				     box_y, box_x + item_x + 1, menu_height);

			wnoutrefresh(dialog);
			wrefresh(menu);

			continue;	/* wait for another key press */
		}

		switch (key) {
		case KEY_LEFT:
		case TAB:
		case KEY_RIGHT:
			button = ((key == KEY_LEFT ? --button : ++button) < 0)
			    ? 4 : (button > 4 ? 0 : button);

			print_buttons(dialog, height, width, button);
			wrefresh(menu);
			break;
		case ' ':
		case 's':
		case 'y':
		case 'n':
		case 'm':
		case '/':
		case 'h':
		case '?':
		case 'z':
		case '\n':
			/* save scroll info */
			*s_scroll = scroll;
			delwin(menu);
			delwin(dialog);
			item_set(scroll + choice);
			item_set_selected(1);
			switch (key) {
			case 'h':
			case '?':
				return 2;
			case 's':

Annotation

Implementation Notes