Re: [PATCH v2] rework menu so that it can support multiline titles

[Sascha Hauer <s.hauer@pengutronix.de>]

On Thu, Aug 18, 2016 at 05:05:03PM +0300, Aleksey Kuleshov wrote:
> Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru>
> ---
>  commands/menu.c   | 23 +++++++++++++---
>  common/boot.c     |  8 ++++--
>  common/menu.c     | 81 ++++++++++++++++++++++++++++++++++++++++++++++++-------
>  common/menutree.c |  9 +++++--
>  include/menu.h    |  6 ++++-
>  5 files changed, 108 insertions(+), 19 deletions(-)

Applied, thanks

Sascha

> 
> diff --git a/commands/menu.c b/commands/menu.c
> index e1079fd..72db26e 100644
> --- a/commands/menu.c
> +++ b/commands/menu.c
> @@ -22,6 +22,7 @@
>  #include <menu.h>
>  #include <getopt.h>
>  #include <errno.h>
> +#include <libbb.h>
>  #include <linux/err.h>
>  
>  typedef enum {
> @@ -146,9 +147,7 @@ static int do_menu_add(struct cmd_menu *cm)
>  	if (!m->name)
>  		goto free;
>  
> -	m->display = strdup(cm->description);
> -	if (!m->display)
> -		goto free;
> +	menu_add_title(m, strdup(cm->description));
>  
>  	ret = menu_add(m);
>  
> @@ -271,7 +270,23 @@ static int do_menu_list(struct cmd_menu *cm)
>  	}
>  
>  	list_for_each_entry(m, &menus->list, list) {
> -		printf("%s: %s\n", m->name, m->display? m->display : m->name);
> +		printf("%s: ", m->name);
> +		if (m->display_lines) {
> +			static char outstr[256];
> +			int i;
> +
> +			printf("\n");
> +			for (i = 0; i < m->display_lines; i++)
> +				/* Conform to menu rendering logic */
> +				if (IS_ENABLED(CONFIG_SHELL_HUSH)) {
> +					process_escape_sequence(m->display[i], outstr, 256);
> +					printf("\t%s\n", outstr);
> +				} else {
> +					printf("\t%s\n", m->display[i]);
> +				}
> +		} else {
> +			printf("%s\n", m->name);
> +		}
>  		if (is_entry(cm))
>  			print_entries(m);
>  	}
> diff --git a/common/boot.c b/common/boot.c
> index 0e9f27f..bc90502 100644
> --- a/common/boot.c
> +++ b/common/boot.c
> @@ -43,7 +43,7 @@ struct bootentries *bootentries_alloc(void)
>  
>  	if (IS_ENABLED(CONFIG_MENU)) {
>  		bootentries->menu = menu_alloc();
> -		bootentries->menu->display = basprintf("boot");
> +		menu_add_title(bootentries->menu, basprintf("boot"));
>  	}
>  
>  	return bootentries;
> @@ -61,8 +61,12 @@ void bootentries_free(struct bootentries *bootentries)
>  		be->release(be);
>  	}
>  
> -	if (bootentries->menu)
> +	if (bootentries->menu) {
> +		int i;
> +		for (i = 0; i < bootentries->menu->display_lines; i++)
> +			free(bootentries->menu->display[i]);
>  		free(bootentries->menu->display);
> +	}
>  	free(bootentries->menu);
>  	free(bootentries);
>  }
> diff --git a/common/menu.c b/common/menu.c
> index 9819569..64df458 100644
> --- a/common/menu.c
> +++ b/common/menu.c
> @@ -43,10 +43,13 @@ EXPORT_SYMBOL(menu_get_menus);
>  void menu_free(struct menu *m)
>  {
>  	struct menu_entry *me, *tmp;
> +	int i;
>  
>  	if (!m)
>  		return;
>  	free(m->name);
> +	for (i = 0; i < m->display_lines; i++)
> +		free(m->display[i]);
>  	free(m->display);
>  	free(m->auto_display);
>  
> @@ -164,7 +167,7 @@ static void __print_entry(const char *str)
>  static void print_menu_entry(struct menu *m, struct menu_entry *me,
>  			     int selected)
>  {
> -	gotoXY(3, me->num + 1);
> +	gotoXY(3, me->num + m->display_lines);
>  
>  	if (me->type == MENU_ENTRY_BOX) {
>  		if (me->box_state)
> @@ -232,14 +235,12 @@ EXPORT_SYMBOL(menu_set_auto_select);
>  static void print_menu(struct menu *m)
>  {
>  	struct menu_entry *me;
> +	int i;
>  
>  	clear();
> -	gotoXY(2, 1);
> -	if(m->display) {
> -		__print_entry(m->display);
> -	} else {
> -		puts("Menu : ");
> -		puts(m->name);
> +	for (i = 0; i < m->display_lines; i++) {
> +		gotoXY(2, 1 + i);
> +		__print_entry(m->display[i]);
>  	}
>  
>  	list_for_each_entry(me, &m->entries, list) {
> @@ -269,7 +270,7 @@ int menu_show(struct menu *m)
>  
>  	countdown = m->auto_select;
>  	if (m->auto_select >= 0) {
> -		gotoXY(3, m->nb_entries + 2);
> +		gotoXY(3, m->nb_entries + m->display_lines + 1);
>  		if (!m->auto_display) {
>  			printf("Auto Select in");
>  		} else {
> @@ -293,10 +294,10 @@ int menu_show(struct menu *m)
>  		}
>  	}
>  
> -	gotoXY(3, m->nb_entries + 2);
> +	gotoXY(3, m->nb_entries + m->display_lines + 1);
>  	printf("%*c", auto_display_len + 4, ' ');
>  
> -	gotoXY(3, m->selected->num + 1);
> +	gotoXY(3, m->selected->num + m->display_lines);
>  
>  	do {
>  		struct menu_entry *old_selected = m->selected;
> @@ -517,3 +518,63 @@ err_free:
>  	return ERR_PTR(ret);
>  }
>  EXPORT_SYMBOL(menu_add_command_entry);
> +
> +/*
> + * Add title to menu.
> + * Lines are separated by explicit char '\n' or by string "\n".
> + *
> + * @display: NULL or pointer to the string which will be freed in this function.
> + *	If NULL or zero length string is provided, default title will be added.
> + */
> +void menu_add_title(struct menu *m, char *display)
> +{
> +	char *tmp, *src, *dst;
> +	int lines = 1;
> +	int i;
> +
> +	if (!display || !strlen(display)) {
> +		free(display);
> +		display = xasprintf("Menu : %s", m->name ? m->name : "");
> +	}
> +
> +	src = dst = tmp = xstrdup(display);
> +	/* Count lines and separate single string into multiple strings */
> +	while (*src) {
> +		if (*src == '\\') {
> +			if (*(src + 1) == '\\') {
> +				*dst++ = *src++;
> +				*dst++ = *src++;
> +				continue;
> +			}
> +			if (*(src + 1) == 'n') {
> +				*dst = 0;
> +				src += 2;
> +				dst++;
> +				lines++;
> +				continue;
> +			}
> +		}
> +		if (*src == '\n') {
> +			*dst = 0;
> +			src++;
> +			dst++;
> +			lines++;
> +			continue;
> +		}
> +		*dst++ = *src++;
> +	}
> +	*dst = 0;
> +
> +	m->display = xzalloc(sizeof(*m->display) * lines);
> +	m->display_lines = lines;
> +
> +	for (src = tmp, i = 0; i < lines; i++) {
> +		m->display[i] = xstrdup(src);
> +		/* Go to the next line */
> +		src += strlen(src) + 1;
> +	}
> +
> +	free(tmp);
> +	free(display);
> +}
> +EXPORT_SYMBOL(menu_add_title);
> diff --git a/common/menutree.c b/common/menutree.c
> index eb14da0..400d1a6 100644
> --- a/common/menutree.c
> +++ b/common/menutree.c
> @@ -19,6 +19,7 @@
>  #include <shell.h>
>  #include <libfile.h>
>  
> +#include <linux/ctype.h>
>  #include <linux/stat.h>
>  
>  struct menutree {
> @@ -95,6 +96,7 @@ int menutree(const char *path, int toplevel)
>  	glob_t g;
>  	int i;
>  	char *globpath, *display;
> +	size_t size;
>  
>  	menu = menu_alloc();
>  
> @@ -106,14 +108,17 @@ int menutree(const char *path, int toplevel)
>  		goto out;
>  	}
>  
> -	display = read_file_line("%s/title", path);
> +	globpath = basprintf("%s/title", path);
> +	display = read_file(globpath, &size);
> +	free(globpath);
>  	if (!display) {
>  		eprintf("no title found in %s/title\n", path);
>  		ret = -EINVAL;
>  		goto out;
>  	}
>  
> -	menu->display = shell_expand(display);
> +	strim(display);
> +	menu_add_title(menu, shell_expand(display));
>  	free(display);
>  
>  	for (i = 0; i < g.gl_pathc; i++) {
> diff --git a/include/menu.h b/include/menu.h
> index 8b0ffb1..3e704a8 100644
> --- a/include/menu.h
> +++ b/include/menu.h
> @@ -47,7 +47,10 @@ struct menu_entry {
>  
>  struct menu {
>  	char *name;
> -	char *display;
> +	/* Multiline title */
> +	char **display;
> +	/* Number of lines */
> +	int display_lines;
>  
>  	int auto_select;
>  	char *auto_display;
> @@ -88,6 +91,7 @@ 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);
> +void menu_add_title(struct menu *m, char *display);
>  
>  /*
>   * menu entry functions
> -- 
> 2.8.0.rc3
> 
> 
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