static int keyboard_notifier_call()

in braille/braille_console.c [143:258]

• 111 lines of code
• 31 McCabe index (conditional complexity)

static int keyboard_notifier_call(struct notifier_block *blk,
				  unsigned long code, void *_param)
{
	struct keyboard_notifier_param *param = _param;
	struct vc_data *vc = param->vc;
	int ret = NOTIFY_OK;

	if (!param->down)
		return ret;

	switch (code) {
	case KBD_KEYCODE:
		if (console_show) {
			if (param->value == BRAILLE_KEY) {
				console_show = 0;
				beep(880);
				vc_maybe_cursor_moved(vc);
				vc_refresh(vc);
				ret = NOTIFY_STOP;
			}
		} else {
			ret = NOTIFY_STOP;
			switch (param->value) {
			case KEY_INSERT:
				beep(440);
				console_show = 1;
				lastVC = -1;
				braille_write(console_buf);
				break;
			case KEY_LEFT:
				if (vc_x > 0) {
					vc_x -= WIDTH;
					if (vc_x < 0)
						vc_x = 0;
				} else if (vc_y >= 1) {
					beep(880);
					vc_y--;
					vc_x = vc->vc_cols-WIDTH;
				} else
					beep(220);
				break;
			case KEY_RIGHT:
				if (vc_x + WIDTH < vc->vc_cols) {
					vc_x += WIDTH;
				} else if (vc_y + 1 < vc->vc_rows) {
					beep(880);
					vc_y++;
					vc_x = 0;
				} else
					beep(220);
				break;
			case KEY_DOWN:
				if (vc_y + 1 < vc->vc_rows)
					vc_y++;
				else
					beep(220);
				break;
			case KEY_UP:
				if (vc_y >= 1)
					vc_y--;
				else
					beep(220);
				break;
			case KEY_HOME:
				vc_follow_cursor(vc);
				break;
			case KEY_PAGEUP:
				vc_x = 0;
				vc_y = 0;
				break;
			case KEY_PAGEDOWN:
				vc_x = 0;
				vc_y = vc->vc_rows-1;
				break;
			default:
				ret = NOTIFY_OK;
				break;
			}
			if (ret == NOTIFY_STOP)
				vc_refresh(vc);
		}
		break;
	case KBD_POST_KEYSYM:
	{
		unsigned char type = KTYP(param->value) - 0xf0;

		if (type == KT_SPEC) {
			unsigned char val = KVAL(param->value);
			int on_off = -1;

			switch (val) {
			case KVAL(K_CAPS):
				on_off = vt_get_leds(fg_console, VC_CAPSLOCK);
				break;
			case KVAL(K_NUM):
				on_off = vt_get_leds(fg_console, VC_NUMLOCK);
				break;
			case KVAL(K_HOLD):
				on_off = vt_get_leds(fg_console, VC_SCROLLOCK);
				break;
			}
			if (on_off == 1)
				beep(880);
			else if (on_off == 0)
				beep(440);
		}
	}
		break;
	case KBD_UNBOUND_KEYCODE:
	case KBD_UNICODE:
	case KBD_KEYSYM:
		/* Unused */
		break;
	}
	return ret;
}