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netsurf/desktop/options.c

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/*
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2005 Richard Wilson <info@tinct.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Option reading and saving (implementation).
*
* Options are stored in the format key:value, one per line. For bool options,
* value is "0" or "1".
*/
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include "css/css.h"
#include "desktop/plot_style.h"
#include "utils/log.h"
#include "utils/utils.h"
#include "desktop/options.h"
struct ns_options nsoptions = {
NSOPTION_MAIN_DEFAULTS,
NSOPTION_SYS_COLOUR_DEFAULTS,
NSOPTION_EXTRA_DEFAULTS
};
enum option_type_e {
OPTION_BOOL,
OPTION_INTEGER,
OPTION_STRING,
OPTION_COLOUR
} ;
struct option_entry_s {
const char *key;
enum option_type_e type;
void *p;
};
struct option_entry_s option_table[] = {
NSOPTION_MAIN_TABLE,
NSOPTION_EXTRA_TABLE
};
#define option_table_entries (sizeof option_table / sizeof option_table[0])
/**
* Set an option value based on a string
*/
static bool
strtooption(const char *value, struct option_entry_s *option_entry)
{
bool ret = false;
colour rgbcolour; /* RRGGBB */
switch (option_entry->type) {
case OPTION_BOOL:
*((bool *)option_entry->p) = value[0] == '1';
ret = true;
break;
case OPTION_INTEGER:
*((int *)option_entry->p) = atoi(value);
ret = true;
break;
case OPTION_COLOUR:
sscanf(value, "%x", &rgbcolour);
*((colour *)option_entry->p) =
((0x000000FF & rgbcolour) << 16) |
((0x0000FF00 & rgbcolour) << 0) |
((0x00FF0000 & rgbcolour) >> 16);
ret = true;
break;
case OPTION_STRING:
free(*((char **)option_entry->p));
if (*value == 0) {
/* do not allow empty strings in text options */
*((char **)option_entry->p) = NULL;
} else {
*((char **)option_entry->p) = strdup(value);
}
ret = true;
break;
}
return ret;
}
static void nsoptions_validate(struct ns_options *opts)
{
if (opts->font_size < 50)
opts->font_size = 50;
if (1000 < opts->font_size)
opts->font_size = 1000;
if (opts->font_min_size < 10)
opts->font_min_size = 10;
if (500 < opts->font_min_size)
opts->font_min_size = 500;
if (opts->memory_cache_size < 0)
opts->memory_cache_size = 0;
}
/* exported interface documented in options.h */
void nsoption_read(const char *path)
{
char s[100];
FILE *fp;
if (path == NULL) {
LOG(("No options loaded"));
return;
}
fp = fopen(path, "r");
if (!fp) {
LOG(("failed to open file '%s'", path));
return;
}
while (fgets(s, 100, fp)) {
char *colon, *value;
unsigned int i;
if (s[0] == 0 || s[0] == '#')
continue;
colon = strchr(s, ':');
if (colon == 0)
continue;
s[strlen(s) - 1] = 0; /* remove \n at end */
*colon = 0; /* terminate key */
value = colon + 1;
for (i = 0; i != option_table_entries; i++) {
if (strcasecmp(s, option_table[i].key) != 0)
continue;
strtooption(value, option_table + i);
break;
}
}
fclose(fp);
nsoptions_validate(&nsoptions);
}
/* exported interface documented in options.h */
void nsoption_write(const char *path)
{
unsigned int entry;
FILE *fp;
colour rgbcolour; /* RRGGBB */
fp = fopen(path, "w");
if (!fp) {
LOG(("failed to open file '%s' for writing", path));
return;
}
for (entry = 0; entry != option_table_entries; entry++) {
switch (option_table[entry].type) {
case OPTION_BOOL:
fprintf(fp, "%s:%c\n", option_table[entry].key,
*((bool *) option_table[entry].p) ? '1' : '0');
break;
case OPTION_INTEGER:
fprintf(fp, "%s:%i\n", option_table[entry].key,
*((int *) option_table[entry].p));
break;
case OPTION_COLOUR:
rgbcolour = ((0x000000FF & *((colour *)
option_table[entry].p)) << 16) |
((0x0000FF00 & *((colour *)
option_table[entry].p)) << 0) |
((0x00FF0000 & *((colour *)
option_table[entry].p)) >> 16);
fprintf(fp, "%s:%06x\n", option_table[entry].key,
rgbcolour);
break;
case OPTION_STRING:
if (((*((char **) option_table[entry].p)) != NULL) &&
(*(*((char **) option_table[entry].p)) != 0)) {
fprintf(fp, "%s:%s\n", option_table[entry].key,
*((char **) option_table[entry].p));
}
break;
}
}
fclose(fp);
}
/**
* Output an option value into a string, in HTML format.
*
* \param option The option to output the value of.
* \param size The size of the string buffer.
* \param pos The current position in string
* \param string The string in which to output the value.
* \return The number of bytes written to string or -1 on error
*/
static size_t
nsoption_output_value_html(struct option_entry_s *option,
size_t size, size_t pos, char *string)
{
size_t slen = 0; /* length added to string */
colour rgbcolour; /* RRGGBB */
switch (option->type) {
case OPTION_BOOL:
slen = snprintf(string + pos, size - pos, "%s",
*((bool *)option->p) ? "true" : "false");
break;
case OPTION_INTEGER:
slen = snprintf(string + pos, size - pos, "%i",
*((int *)option->p));
break;
case OPTION_COLOUR:
rgbcolour = ((0x000000FF & *((colour *) option->p)) << 16) |
((0x0000FF00 & *((colour *) option->p)) << 0) |
((0x00FF0000 & *((colour *) option->p)) >> 16);
slen = snprintf(string + pos, size - pos,
"<span style=\"background-color: #%06x; "
"color: #%06x;\">#%06x</span>", rgbcolour,
(~rgbcolour) & 0xffffff, rgbcolour);
break;
case OPTION_STRING:
if (*((char **)option->p) != NULL) {
slen = snprintf(string + pos, size - pos, "%s",
*((char **)option->p));
} else {
slen = snprintf(string + pos, size - pos,
"<span class=\"null-content\">NULL"
"</span>");
}
break;
}
return slen;
}
/**
* Output an option value into a string, in plain text format.
*
* \param option The option to output the value of.
* \param size The size of the string buffer.
* \param pos The current position in string
* \param string The string in which to output the value.
* \return The number of bytes written to string or -1 on error
*/
static size_t
nsoption_output_value_text(struct option_entry_s *option,
size_t size, size_t pos, char *string)
{
size_t slen = 0; /* length added to string */
colour rgbcolour; /* RRGGBB */
switch (option->type) {
case OPTION_BOOL:
slen = snprintf(string + pos, size - pos, "%c",
*((bool *)option->p) ? '1' : '0');
break;
case OPTION_INTEGER:
slen = snprintf(string + pos, size - pos, "%i",
*((int *)option->p));
break;
case OPTION_COLOUR:
rgbcolour = ((0x000000FF & *((colour *) option->p)) << 16) |
((0x0000FF00 & *((colour *) option->p)) << 0) |
((0x00FF0000 & *((colour *) option->p)) >> 16);
slen = snprintf(string + pos, size - pos, "%06x", rgbcolour);
break;
case OPTION_STRING:
if (*((char **)option->p) != NULL) {
slen = snprintf(string + pos, size - pos, "%s",
*((char **)option->p));
}
break;
}
return slen;
}
/* exported interface documented in options.h */
void
nsoption_commandline(int *pargc, char **argv)
{
char *arg;
char *val;
int arglen;
int idx = 1;
int mv_loop;
unsigned int entry_loop;
while (idx < *pargc) {
arg = argv[idx];
arglen = strlen(arg);
/* check we have an option */
/* option must start -- and be as long as the shortest option*/
if ((arglen < (2+5) ) || (arg[0] != '-') || (arg[1] != '-'))
break;
arg += 2; /* skip -- */
val = strchr(arg, '=');
if (val == NULL) {
/* no equals sign - next parameter is val */
idx++;
if (idx >= *pargc)
break;
val = argv[idx];
} else {
/* equals sign */
arglen = val - arg ;
val++;
}
/* arg+arglen is the option to set, val is the value */
LOG(("%.*s = %s",arglen,arg,val));
for (entry_loop = 0;
entry_loop < option_table_entries;
entry_loop++) {
if (strncmp(arg, option_table[entry_loop].key,
arglen) == 0) {
strtooption(val, option_table + entry_loop);
break;
}
}
idx++;
}
/* remove processed options from argv */
for (mv_loop=0;mv_loop < (*pargc - idx); mv_loop++) {
argv[mv_loop + 1] = argv[mv_loop + idx];
}
*pargc -= (idx - 1);
}
/* exported interface documented in options.h */
int
nsoption_snoptionf(char *string, size_t size, unsigned int option, const char *fmt)
{
size_t slen = 0; /* current output string length */
int fmtc = 0; /* current index into format string */
struct option_entry_s *option_entry;
if (option >= option_table_entries)
return -1;
option_entry = option_table + option;
while((slen < size) && (fmt[fmtc] != 0)) {
if (fmt[fmtc] == '%') {
fmtc++;
switch (fmt[fmtc]) {
case 'k':
slen += snprintf(string + slen, size - slen,
"%s", option_entry->key);
break;
case 't':
switch (option_entry->type) {
case OPTION_BOOL:
slen += snprintf(string + slen,
size - slen,
"boolean");
break;
case OPTION_INTEGER:
slen += snprintf(string + slen,
size - slen,
"integer");
break;
case OPTION_COLOUR:
slen += snprintf(string + slen,
size - slen,
"colour");
break;
case OPTION_STRING:
slen += snprintf(string + slen,
size - slen,
"string");
break;
}
break;
case 'V':
slen += nsoption_output_value_html(option_entry,
size, slen, string);
break;
case 'v':
slen += nsoption_output_value_text(option_entry,
size, slen, string);
break;
}
fmtc++;
} else {
string[slen] = fmt[fmtc];
slen++;
fmtc++;
}
}
/* Ensure that we NUL-terminate the output */
string[min(slen, size - 1)] = '\0';
return slen;
}
/* exported interface documented in options.h */
void
nsoption_dump(FILE *outf)
{
char buffer[256];
int opt_loop = 0;
int res;
do {
res = nsoption_snoptionf(buffer, sizeof buffer, opt_loop,
"%k:%v\n");
if (res > 0) {
fprintf(outf, "%s", buffer);
}
opt_loop++;
} while (res > 0);
}
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