[PATCH v2 3/3] eficonfig: add vertical scroll support

[Ilias Apalodimas]

This looks correct to me.
Heinrich can you check if that solves your scrolling issues?

On Sat, Dec 24, 2022 at 07:57:44AM +0900, Masahisa Kojima wrote:
> The current eficonfig menu does not support vertical scroll,
> so it can not display the menu entries greater than
> the console row size.
>
> This commit add the vertial scroll support.
> The console size is retrieved by
> SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode() service, then
> calculates the row size for menu entry by subtracting
> menu header and description row size from the console row size.
> "start" and "end" are added in the efimenu structure.
> "start" keeps the menu entry index at the top, "end" keeps
> the bottom menu entry index. item_data_print() menu function
> only draws the menu entry between "start" and "end".
>
> Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
> ---
> No update since v1
>
>  cmd/eficonfig.c      | 79 ++++++++++++++++++++++++++++++++++++--------
>  include/efi_config.h |  4 +++
>  include/efi_loader.h |  1 +
>  3 files changed, 70 insertions(+), 14 deletions(-)
>
> diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> index 13929cb003..e289d95589 100644
> --- a/cmd/eficonfig.c
> +++ b/cmd/eficonfig.c
> @@ -29,8 +29,13 @@ static const char *eficonfig_change_boot_order_desc =
>  	"  Press SPACE to activate or deactivate the entry\n"
>  	"  Select [Save] to complete, ESC/CTRL+C to quit";
>
> +static struct efi_simple_text_output_protocol *cout;
> +static int avail_row;
> +
>  #define EFICONFIG_DESCRIPTION_MAX 32
>  #define EFICONFIG_OPTIONAL_DATA_MAX 64
> +#define EFICONFIG_MENU_HEADER_ROW_NUM 3
> +#define EFICONFIG_MENU_DESC_ROW_NUM 5
>
>  /**
>   * struct eficonfig_filepath_info - structure to be used to store file path
> @@ -156,18 +161,16 @@ void eficonfig_print_entry(void *data)
>  	struct eficonfig_entry *entry = data;
>  	int reverse = (entry->efi_menu->active == entry->num);
>
> -	/* TODO: support scroll or page for many entries */
> +	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> +		return;
>
> -	/*
> -	 * Move cursor to line where the entry will be drawn (entry->num)
> -	 * First 3 lines(menu header) + 1 empty line
> -	 */
> -	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> +	printf(ANSI_CURSOR_POSITION, (entry->num - entry->efi_menu->start) +
> +	       EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_REVERSE);
>
> -	printf("%s", entry->title);
> +	printf(ANSI_CLEAR_LINE "%s", entry->title);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_RESET);
> @@ -190,8 +193,8 @@ void eficonfig_display_statusline(struct menu *m)
>  	       ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
>  	       "%s"
>  	       ANSI_CLEAR_LINE_TO_END,
> -	       1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
> -	       entry->efi_menu->count + 6, 1, entry->efi_menu->menu_desc);
> +	       1, 1, entry->efi_menu->menu_header, avail_row + 4, 1,
> +	       avail_row + 5, 1, entry->efi_menu->menu_desc);
>  }
>
>  /**
> @@ -213,13 +216,23 @@ char *eficonfig_choice_entry(void *data)
>
>  		switch (key) {
>  		case KEY_UP:
> -			if (efi_menu->active > 0)
> +			if (efi_menu->active > 0) {
>  				--efi_menu->active;
> +				if (efi_menu->start > efi_menu->active) {
> +					efi_menu->start--;
> +					efi_menu->end--;
> +				}
> +			}
>  			/* no menu key selected, regenerate menu */
>  			return NULL;
>  		case KEY_DOWN:
> -			if (efi_menu->active < efi_menu->count - 1)
> +			if (efi_menu->active < efi_menu->count - 1) {
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
> +			}
>  			/* no menu key selected, regenerate menu */
>  			return NULL;
>  		case KEY_SELECT:
> @@ -399,6 +412,8 @@ efi_status_t eficonfig_process_common(struct efimenu *efi_menu,
>
>  	efi_menu->delay = -1;
>  	efi_menu->active = 0;
> +	efi_menu->start = 0;
> +	efi_menu->end = avail_row - 1;
>
>  	if (menu_header) {
>  		efi_menu->menu_header = strdup(menu_header);
> @@ -1865,7 +1880,11 @@ static void eficonfig_print_change_boot_order_entry(void *data)
>  	struct eficonfig_entry *entry = data;
>  	int reverse = (entry->efi_menu->active == entry->num);
>
> -	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> +	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> +		return;
> +
> +	printf(ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
> +	       (entry->num - entry->efi_menu->start) + EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_REVERSE);
> @@ -1916,8 +1935,13 @@ char *eficonfig_choice_change_boot_order(void *data)
>  			}
>  			fallthrough;
>  		case KEY_UP:
> -			if (efi_menu->active > 0)
> +			if (efi_menu->active > 0) {
>  				--efi_menu->active;
> +				if (efi_menu->start > efi_menu->active) {
> +					efi_menu->start--;
> +					efi_menu->end--;
> +				}
> +			}
>  			return NULL;
>  		case KEY_MINUS:
>  			if (efi_menu->active < efi_menu->count - 3) {
> @@ -1933,11 +1957,20 @@ char *eficonfig_choice_change_boot_order(void *data)
>  				list_add(&entry->list, &tmp->list);
>
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
>  			}
>  			return NULL;
>  		case KEY_DOWN:
> -			if (efi_menu->active < efi_menu->count - 1)
> +			if (efi_menu->active < efi_menu->count - 1) {
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
> +			}
>  			return NULL;
>  		case KEY_SELECT:
>  			/* "Save" */
> @@ -2585,6 +2618,7 @@ static efi_status_t eficonfig_init(void)
>  	efi_status_t ret = EFI_SUCCESS;
>  	static bool init;
>  	struct efi_handler *handler;
> +	unsigned long columns, rows;
>
>  	if (!init) {
>  		ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> @@ -2595,6 +2629,23 @@ static efi_status_t eficonfig_init(void)
>  					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
>  		if (ret != EFI_SUCCESS)
>  			return ret;
> +		ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +
> +		ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
> +					EFI_OPEN_PROTOCOL_GET_PROTOCOL);

Shouldn't we be closing the protocol if eficonfig terminates?

> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +
> +		cout->query_mode(cout, cout->mode->mode, &columns, &rows);

[...]

Regards
/Ilias