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freebsd/lib/libdpv/dialogrc.c

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/*-
* Copyright (c) 2013-2015 Devin Teske <dteske@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <figpar.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string_m.h>
#include "dialogrc.h"
#define STR_BUFSIZE 255
/* dialog(1) `.dialogrc' characteristics */
uint8_t use_colors = 1;
uint8_t use_shadow = 1;
char gauge_color[STR_BUFSIZE] = "47b"; /* (BLUE,WHITE,ON) */
char separator[STR_BUFSIZE] = "";
/* Function prototypes */
static int setattr(struct figpar_config *, uint32_t, char *, char *);
static int setbool(struct figpar_config *, uint32_t, char *, char *);
static int setnum(struct figpar_config *, uint32_t, char *, char *);
static int setstr(struct figpar_config *, uint32_t, char *, char *);
/*
* Anatomy of DIALOGRC (~/.dialogrc by default)
* NOTE: Must appear after private function prototypes (above)
* NB: Brace-initialization of union requires cast to *first* member of union
*/
static struct figpar_config dialogrc_config[] = {
/* TYPE DIRECTIVE DEFAULT HANDLER */
{FIGPAR_TYPE_INT, "aspect", {(void *)0}, &setnum},
{FIGPAR_TYPE_STR, "separate_widget", {separator}, &setstr},
{FIGPAR_TYPE_INT, "tab_len", {(void *)0}, &setnum},
{FIGPAR_TYPE_BOOL, "visit_items", {(void *)0}, &setbool},
{FIGPAR_TYPE_BOOL, "use_shadow", {(void *)1}, &setbool},
{FIGPAR_TYPE_BOOL, "use_colors", {(void *)1}, &setbool},
{FIGPAR_TYPE_STR, "screen_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "shadow_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "dialog_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "title_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "border_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_active_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_inactive_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_key_active_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_key_inactive_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_label_active_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "button_label_inactive_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "inputbox_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "inputbox_border_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "searchbox_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "searchbox_title_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "searchbox_border_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "position_indicator_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "menubox_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "menubox_border_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "item_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "item_selected_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "tag_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "tag_selected_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "tag_key_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "tag_key_selected_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "check_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "check_selected_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "uarrow_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "darrow_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "itemhelp_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "form_active_text_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "form_text_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "form_item_readonly_color", {NULL}, &setattr},
{FIGPAR_TYPE_STR, "gauge_color", {gauge_color}, &setattr},
{0, NULL, {0}, NULL}
};
/*
* figpar call-back for interpreting value as .dialogrc `Attribute'
*/
static int
setattr(struct figpar_config *option, uint32_t line __unused,
char *directive __unused, char *value)
{
char *cp = value;
char *val;
size_t len;
char attrbuf[4];
if (option == NULL) {
warnx("%s:%d:%s: Missing callback parameter", __FILE__,
__LINE__, __func__);
return (-1); /* Abort processing */
}
/* Allocate memory for the data if not already done */
if (option->value.str == NULL) {
if ((option->value.str = malloc(STR_BUFSIZE)) == NULL)
return (-1);
}
/*
* If the first character is left-parenthesis, the format is
* `(background,foreground,highlight)' otherwise, we should take it
* as a reference to another color.
*/
if (*cp != '(') {
/* Copy the [current] value from the referenced color */
val = dialogrc_config_option(cp)->value.str;
if (val != NULL)
snprintf(option->value.str, STR_BUFSIZE, "%s", val);
return (0);
} else
cp++;
strtolower(cp);
/* Initialize the attrbuf (fg,bg,hi,NUL) */
attrbuf[0] = '0';
attrbuf[1] = '0';
attrbuf[2] = 'B'; /* \ZB = disable; \Zb = enable (see dialog(1)) */
attrbuf[3] = '\0';
/* Interpret the foreground color */
if (strncmp(cp, "red,", 4) == 0) attrbuf[0] = '1';
else if (strncmp(cp, "green,", 6) == 0) attrbuf[0] = '2';
else if (strncmp(cp, "yellow,", 7) == 0) attrbuf[0] = '3';
else if (strncmp(cp, "blue,", 5) == 0) attrbuf[0] = '4';
else if (strncmp(cp, "magenta,", 8) == 0) attrbuf[0] = '5';
else if (strncmp(cp, "cyan,", 5) == 0) attrbuf[0] = '6';
else if (strncmp(cp, "white,", 6) == 0) attrbuf[0] = '7';
else if (strncmp(cp, "black,", 6) == 0) attrbuf[0] = '8';
/* Advance to the background color */
cp = strchr(cp, ',');
if (cp == NULL)
goto write_attrbuf;
else
cp++;
/* Interpret the background color */
if (strncmp(cp, "red,", 4) == 0) attrbuf[1] = '1';
else if (strncmp(cp, "green,", 6) == 0) attrbuf[1] = '2';
else if (strncmp(cp, "yellow,", 7) == 0) attrbuf[1] = '3';
else if (strncmp(cp, "blue,", 5) == 0) attrbuf[1] = '4';
else if (strncmp(cp, "magenta,", 8) == 0) attrbuf[1] = '5';
else if (strncmp(cp, "cyan,", 5) == 0) attrbuf[1] = '6';
else if (strncmp(cp, "white,", 6) == 0) attrbuf[1] = '7';
else if (strncmp(cp, "black,", 6) == 0) attrbuf[1] = '8';
/* Advance to the highlight */
cp = strchr(cp, ',');
if (cp == NULL)
goto write_attrbuf;
else
cp++;
/* Trim trailing parenthesis */
len = strlen(cp);
if (cp[len - 1] == ')')
cp[len - 1] = '\0';
/* Interpret the highlight (initialized to off above) */
if (strcmp(cp, "on") == 0 || strncmp(cp, "on,", 3) == 0)
attrbuf[2] = 'b'; /* \Zb = enable bold (see dialog(1)) */
write_attrbuf:
sprintf(option->value.str, "%s", attrbuf);
return (0);
}
/*
* figpar call-back for interpreting value as .dialogrc `Boolean'
*/
static int
setbool(struct figpar_config *option, uint32_t line __unused,
char *directive __unused, char *value)
{
if (option == NULL) {
warnx("%s:%d:%s: Missing callback parameter", __FILE__,
__LINE__, __func__);
return (-1); /* Abort processing */
}
/* Assume ON, check for OFF (case-insensitive) */
option->value.boolean = 1;
strtolower(value);
if (strcmp(value, "off") == 0)
option->value.boolean = 0;
return (0);
}
/*
* figpar call-back for interpreting value as .dialogrc `Number'
*/
static int
setnum(struct figpar_config *option, uint32_t line __unused,
char *directive __unused, char *value)
{
if (option == NULL) {
warnx("%s:%d:%s: Missing callback parameter", __FILE__,
__LINE__, __func__);
return (-1); /* Abort processing */
}
/* Convert the string to a 32-bit signed integer */
option->value.num = (int32_t)strtol(value, (char **)NULL, 10);
return (0);
}
/*
* figpar call-back for interpreting value as .dialogrc `String'
*/
static int
setstr(struct figpar_config *option, uint32_t line __unused,
char *directive __unused, char *value)
{
size_t len;
if (option == NULL) {
warnx("%s:%d:%s: Missing callback parameter", __FILE__,
__LINE__, __func__);
return (-1); /* Abort processing */
}
/* Allocate memory for the data if not already done */
if (option->value.str == NULL) {
if ((option->value.str = malloc(STR_BUFSIZE)) == NULL)
return (-1);
}
/* Trim leading quote */
if (*value == '"')
value++;
/* Write the data into the buffer */
snprintf(option->value.str, STR_BUFSIZE, "%s", value);
/* Trim trailing quote */
len = strlen(option->value.str);
if (option->value.str[len - 1] == '"')
option->value.str[len - 1] = '\0';
return (0);
}
/*
* Parse (in order of preference) $DIALOGRC or `$HOME/.dialogrc'. Returns zero
* on success, -1 on failure (and errno should be consulted).
*/
int
parse_dialogrc(void)
{
char *cp;
int res;
size_t len;
char path[PATH_MAX];
/* Allow $DIALOGRC to override `$HOME/.dialogrc' default */
if ((cp = getenv(ENV_DIALOGRC)) != NULL && *cp != '\0')
snprintf(path, PATH_MAX, "%s", cp);
else if ((cp = getenv(ENV_HOME)) != NULL) {
/* Copy $HOME into buffer and append trailing `/' if missing */
snprintf(path, PATH_MAX, "%s", cp);
len = strlen(path);
cp = path + len;
if (len > 0 && len < (PATH_MAX - 1) && *(cp - 1) != '/') {
*cp++ = '/';
*cp = '\0';
len++;
}
/* If we still have room, shove in the name of rc file */
if (len < (PATH_MAX - 1))
snprintf(cp, PATH_MAX - len, "%s", DIALOGRC);
} else {
/* Like dialog(1), don't process a file if $HOME is unset */
errno = ENOENT;
return (-1);
}
/* Process file (either $DIALOGRC if set, or `$HOME/.dialogrc') */
res = parse_config(dialogrc_config,
path, NULL, FIGPAR_BREAK_ON_EQUALS);
/* Set some globals based on what we parsed */
use_shadow = dialogrc_config_option("use_shadow")->value.boolean;
use_colors = dialogrc_config_option("use_colors")->value.boolean;
snprintf(gauge_color, STR_BUFSIZE, "%s",
dialogrc_config_option("gauge_color")->value.str);
return (res);
}
/*
* Return a pointer to the `.dialogrc' config option specific to `directive' or
* static figpar_dummy_config (full of NULLs) if none found (see
* get_config_option(3); part of figpar(3)).
*/
struct figpar_config *
dialogrc_config_option(const char *directive)
{
return (get_config_option(dialogrc_config, directive));
}
/*
* Free allocated items initialized by setattr() (via parse_config() callback
* matrix [dialogrc_config] used in parse_dialogrc() above).
*/
void
dialogrc_free(void)
{
char *value;
uint32_t n;
for (n = 0; dialogrc_config[n].directive != NULL; n++) {
if (dialogrc_config[n].action != &setattr)
continue;
value = dialogrc_config[n].value.str;
if (value != NULL && value != gauge_color) {
free(dialogrc_config[n].value.str);
dialogrc_config[n].value.str = NULL;
}
}
}
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