Re: [PATCH v4 3/4] eficonfig: add vertical scroll support

Ilias Apalodimas
2023-01-23T15:43:08Z

On Fri, Jan 20, 2023 at 05:43:57PM +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@linaro.org>
> ---
> No update since v3
>
> Changes in v3:
> - modify "reverse" local variable type to bool
>
> Changes in v2:
> - add comment when the user key press is not valid
> - add const qualifier to eficonfig_change_boot_order_desc
>
> 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 01bd1b05bc..5692b332c7 100644
> --- a/cmd/eficonfig.c
> +++ b/cmd/eficonfig.c
> @@ -30,8 +30,13 @@ 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
> @@ -157,18 +162,16 @@ void eficonfig_print_entry(void *data)
> struct eficonfig_entry *entry = data;
> bool 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);
> @@ -191,8 +194,8 @@ 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);
> }
>
> /**
> @@ -216,13 +219,23 @@ char *eficonfig_choice_entry(void *data)
>
> switch (key) {
> case BKEY_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--;
> + }

For all the sequences of this do:
void efi_menu_adjust(struct efimenu *menu, bool add) {
if (add && efi_menu->end < efi_menu->active) {
menu->start++;
menu->end++;
} else if (!add && efi_menu->start > efi_menu->active)
menu->start--;
menu->end--;
}
}
#define efi_menu_up(_a) efi_menu_adjust(_a, true)
#define efi_menu_down(_a) efi_menu_adjust(_a, false)

I think this would look a bit more readable

> + }
> /* no menu key selected, regenerate menu */
> return NULL;
> case BKEY_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++;

[...]

Regards
/Ilias