scripts/kconfig/lxdialog/inputbox.c

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

File Facts

System
Linux kernel
Corpus path
scripts/kconfig/lxdialog/inputbox.c
Extension
.c
Size
6595 bytes
Lines
292
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 (button == -1) {	/* Input box selected */
			switch (key) {
			case TAB:
			case KEY_UP:
			case KEY_DOWN:
				break;
			case KEY_BACKSPACE:
			case 8:   /* ^H */
			case 127: /* ^? */
				if (pos) {
					wattrset(dialog, dlg.inputbox.atr);
					if (input_x == 0) {
						show_x--;
					} else
						input_x--;

					if (pos < len) {
						for (i = pos - 1; i < len; i++) {
							instr[i] = instr[i+1];
						}
					}

					pos--;
					len--;
					instr[len] = '\0';
					wmove(dialog, box_y, box_x);
					for (i = 0; i < box_width; i++) {
						if (!instr[show_x + i]) {
							waddch(dialog, ' ');
							break;
						}
						waddch(dialog, instr[show_x + i]);
					}
					wmove(dialog, box_y, input_x + box_x);
					wrefresh(dialog);
				}
				continue;
			case KEY_LEFT:
				if (pos > 0) {
					if (input_x > 0) {
						wmove(dialog, box_y, --input_x + box_x);
					} else if (input_x == 0) {
						show_x--;
						wmove(dialog, box_y, box_x);
						for (i = 0; i < box_width; i++) {
							if (!instr[show_x + i]) {
								waddch(dialog, ' ');
								break;
							}
							waddch(dialog, instr[show_x + i]);
						}
						wmove(dialog, box_y, box_x);
					}
					pos--;
				}
				continue;
			case KEY_RIGHT:
				if (pos < len) {
					if (input_x < box_width - 1) {
						wmove(dialog, box_y, ++input_x + box_x);
					} else if (input_x == box_width - 1) {
						show_x++;
						wmove(dialog, box_y, box_x);
						for (i = 0; i < box_width; i++) {
							if (!instr[show_x + i]) {
								waddch(dialog, ' ');
								break;
							}
							waddch(dialog, instr[show_x + i]);
						}
						wmove(dialog, box_y, input_x + box_x);
					}
					pos++;
				}
				continue;
			default:
				if (key < 0x100 && isprint(key)) {
					if (len < MAX_LEN) {
						wattrset(dialog, dlg.inputbox.atr);
						if (pos < len) {
							for (i = len; i > pos; i--)
								instr[i] = instr[i-1];
							instr[pos] = key;
						} else {
							instr[len] = key;
						}
						pos++;
						len++;
						instr[len] = '\0';

Annotation

Implementation Notes