[PATCH 2/2] menu: add auto select support
Sascha Hauer
s.hauer at pengutronix.de
Thu Sep 16 11:06:05 EDT 2010
On Mon, Sep 06, 2010 at 02:07:49PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> this will allow to automaticaly run an entry if the user do no choice
>
> this is usefull for boot menu as example
>
> with menu -s -m boot -A 3 -d "Auto Boot in"
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> ---
> commands/menu.c | 25 ++++++++++++++++++++++---
> common/menu.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
> include/menu.h | 4 ++++
> 3 files changed, 79 insertions(+), 4 deletions(-)
>
> diff --git a/commands/menu.c b/commands/menu.c
> index f734db3..ab35cf9 100644
> --- a/commands/menu.c
> +++ b/commands/menu.c
> @@ -48,11 +48,12 @@ struct cmd_menu {
> char *command;
> char *submenu;
> int num;
> + int auto_select;
> #endif
> };
>
> #if defined(CONFIG_CMD_MENU_MANAGEMENT)
> -#define OPTS "m:earlc:d:RsSn:u:"
> +#define OPTS "m:earlc:d:RsSn:u:A:"
> #define is_entry(x) ((x)->entry)
> #else
> #define OPTS "m:ls"
> @@ -212,7 +213,7 @@ static int do_menu_select(struct cmd_menu *cm)
> #endif
>
> /*
> - * menu -s -m <menu>
> + * menu -s -m <menu> [-A <auto select delay>] [-d <display]
> */
> static int do_menu_show(struct cmd_menu *cm)
> {
> @@ -223,6 +224,18 @@ static int do_menu_show(struct cmd_menu *cm)
> else
> m = menu_get_by_name("boot");
>
> + if (!m)
> + return -EINVAL;
> +
> + if (cm->auto_select != -EINVAL) {
> + menu_set_auto_select(m, cm->auto_select);
> +
> + if (m->auto_display)
> + free(m->auto_display);
I was told free(NULL) is safe...
> +
> + m->auto_display = strdup(cm->description);
> + }
> +
> return menu_show(m);
> }
>
> @@ -300,6 +313,7 @@ static int do_menu(struct command *cmdtp, int argc, char *argv[])
> memset(&cm, 0, sizeof(struct cmd_menu));
> #if defined(CONFIG_CMD_MENU_MANAGEMENT)
> cm.num = -EINVAL;
> + cm.auto_select = -EINVAL;
> #endif
>
> cm.action = action_show;
> @@ -343,6 +357,9 @@ static int do_menu(struct command *cmdtp, int argc, char *argv[])
> case 'n':
> cm.num = simple_strtoul(optarg, NULL, 10);
> break;
> + case 'A':
> + cm.auto_select = simple_strtoul(optarg, NULL, 10);
> + break;
> #endif
> default:
> return 1;
> @@ -398,7 +415,9 @@ static const __maybe_unused char cmd_menu_help[] =
> "How to\n"
> "\n"
> "Show menu\n"
> -" menu -s -m <menu>\n"
> +" (-A auto select delay)\n"
> +" (-d auto select description)\n"
> +" menu -s -m <menu> [-A delay] [-d auto_display]\n"
> "\n"
> "List menu\n"
> " menu -l\n"
> diff --git a/common/menu.c b/common/menu.c
> index 7620d9e..339bb3d 100644
> --- a/common/menu.c
> +++ b/common/menu.c
> @@ -29,6 +29,7 @@
> #include <xfuncs.h>
> #include <errno.h>
> #include <readkey.h>
> +#include <clock.h>
> #include <linux/err.h>
>
> static LIST_HEAD(menus);
> @@ -49,6 +50,7 @@ void menu_free(struct menu *m)
> return;
> free(m->name);
> free(m->display);
> + free(m->auto_display);
>
> list_for_each_entry_safe(me, tmp, &m->entries, list)
> menu_entry_free(me);
> @@ -187,6 +189,16 @@ int menu_set_selected(struct menu *m, int num)
> return 0;
> }
>
> +int menu_set_auto_select(struct menu *m, int delay)
> +{
> + if (!m)
> + return -EINVAL;
> +
> + m->auto_select = delay;
> +
> + return 0;
> +}
I think this function only makes sense when struct menu is opaque to its
users, but in our case you can simply do a m->auto_select = delay
instead of calling this function.
> +
> static void print_menu(struct menu *m)
> {
> struct menu_entry *me;
> @@ -217,14 +229,54 @@ int menu_show(struct menu *m)
> {
> int ch;
> int escape = 0;
> + int countdown;
> + int auto_display_len = 16;
> + uint64_t start, second;
>
> if(!m || list_empty(&m->entries))
> return -EINVAL;
>
> print_menu(m);
>
> + countdown = m->auto_select;
> + if (m->auto_select >= 0) {
m->auto_select should be initialized to -EINVAL. Otherwise this
condition is true even when we do not want to autoselect an item.
Also, I think m->auto_select shouldn't be modified in this function.
Otherwise the behaviour of this function changes if called again.
> + gotoXY(m->nb_entries + 2, 3);
> + if (!m->auto_display) {
> + printf("Auto Select in");
> + } else {
> + auto_display_len = strlen(m->auto_display);
> + printf(m->auto_display);
> + }
> + printf(" %2d", countdown--);
> + }
> +
> + start = get_time_ns();
> + second = start;
> + while (m->auto_select > 0 && !is_timeout(start, m->auto_select * SECOND)) {
> + if (tstc()) {
> + ch = getc();
You should remove this line. It only makes that the first character the
user types is lost.
> + m->auto_select = -1;
> + break;
> + }
> +
> + if (is_timeout(second, SECOND)) {
> + printf("\b\b%2d", countdown--);
> + second += SECOND;
> + }
> + }
> +
> + gotoXY(m->nb_entries + 2, 3);
> + for (start = 0; start < auto_display_len + 4; start++)
> + putchar(' ');
This can be done without a loop:
printf("%*c", auto_display_len + 4, ' ');
> +
> do {
> - ch = getc();
> + if (m->auto_select >= 0)
> + ch = '\n';
> + else
> + ch = getc();
> +
> + m->auto_select = -1;
> +
> switch(ch) {
> case 0x1b:
> escape = 1;
> diff --git a/include/menu.h b/include/menu.h
> index 22bfc23..cc9d0af 100644
> --- a/include/menu.h
> +++ b/include/menu.h
> @@ -42,6 +42,9 @@ struct menu {
> char *name;
> char *display;
>
> + int auto_select;
> + char *auto_display;
> +
> struct list_head list;
> struct list_head entries;
>
> @@ -74,6 +77,7 @@ struct menu* menu_get_by_name(char *name);
> int menu_show(struct menu *m);
> int menu_set_selected_entry(struct menu *m, struct menu_entry* me);
> int menu_set_selected(struct menu *m, int num);
> +int menu_set_auto_select(struct menu *m, int delay);
> struct menu* menu_get_menus(void);
>
> /*
> --
> 1.7.1
>
>
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