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netsurf/desktop/options.c

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/*
* This file is part of NetSurf, http://netsurf-browser.org/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* 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>
*/
/** \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 <libxml/HTMLparser.h>
#include <libxml/HTMLtree.h>
#include "content/urldb.h"
#include "css/css.h"
#include "desktop/options.h"
#include "desktop/tree.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#if defined(riscos)
#include "riscos/options.h"
#elif defined(nsgtk)
#include "gtk/options.h"
#else
#define EXTRA_OPTION_DEFINE
#define EXTRA_OPTION_TABLE
#endif
/** An HTTP proxy should be used. */
bool option_http_proxy = false;
/** Hostname of proxy. */
char *option_http_proxy_host = 0;
/** Proxy port. */
int option_http_proxy_port = 8080;
/** Proxy authentication method. */
int option_http_proxy_auth = OPTION_HTTP_PROXY_AUTH_NONE;
/** Proxy authentication user name */
char *option_http_proxy_auth_user = 0;
/** Proxy authentication password */
char *option_http_proxy_auth_pass = 0;
/** Default font size / 0.1pt. */
int option_font_size = 100;
/** Minimum font size. */
int option_font_min_size = 70;
/** Default sans serif font */
char *option_font_sans;
/** Default serif font */
char *option_font_serif;
/** Default monospace font */
char *option_font_mono;
/** Default cursive font */
char *option_font_cursive;
/** Default fantasy font */
char *option_font_fantasy;
/** Accept-Language header. */
char *option_accept_language = 0;
/** Accept-Charset header. */
char *option_accept_charset = 0;
/** Preferred maximum size of memory cache / bytes. */
int option_memory_cache_size = 2 * 1024 * 1024;
/** Preferred expiry age of disc cache / days. */
int option_disc_cache_age = 28;
/** Whether to block advertisements */
bool option_block_ads = false;
/** Minimum GIF animation delay */
int option_minimum_gif_delay = 10;
/** Whether to send the referer HTTP header */
bool option_send_referer = true;
/** Whether to animate images */
bool option_animate_images = true;
/** How many days to retain URL data for */
int option_expire_url = 28;
/** Default font family */
int option_font_default = CSS_FONT_FAMILY_SANS_SERIF;
/** ca-bundle location */
char *option_ca_bundle = 0;
/** ca-path location */
char *option_ca_path = 0;
/** Cookie file location */
char *option_cookie_file = 0;
/** Cookie jar loaction */
char *option_cookie_jar = 0;
/** Home page location */
char *option_homepage_url = 0;
/** URL completion in url bar */
bool option_url_suggestion = true;
/** default x position of new windows */
int option_window_x = 0;
/** default y position of new windows */
int option_window_y = 0;
/** default width of new windows */
int option_window_width = 0;
/** default height of new windows */
int option_window_height = 0;
/** width of screen when above options were saved */
int option_window_screen_width = 0;
/** height of screen when above options were saved */
int option_window_screen_height = 0;
/** default size of status bar vs. h scroll bar */
#ifdef nsgtk
int option_toolbar_status_width = 400;
#else
int option_toolbar_status_width = 6667;
#endif
/* Fetcher configuration */
/** Maximum simultaneous active fetchers */
int option_max_fetchers = 24;
/** Maximum simultaneous active fetchers per host.
* (<=option_max_fetchers else it makes no sense
*/
int option_max_fetchers_per_host = 2;
/** Maximum number of inactive fetchers cached.
* The total number of handles netsurf will therefore have open
* is this plus option_max_fetchers.
*/
int option_max_cached_fetch_handles = 6;
/** Whether to allow target="_blank" */
bool option_target_blank = true;
EXTRA_OPTION_DEFINE
struct {
const char *key;
enum { OPTION_BOOL, OPTION_INTEGER, OPTION_STRING } type;
void *p;
} option_table[] = {
{ "http_proxy", OPTION_BOOL, &option_http_proxy },
{ "http_proxy_host", OPTION_STRING, &option_http_proxy_host },
{ "http_proxy_port", OPTION_INTEGER, &option_http_proxy_port },
{ "http_proxy_auth", OPTION_BOOL, &option_http_proxy_auth },
{ "http_proxy_auth_user", OPTION_STRING, &option_http_proxy_auth_user },
{ "http_proxy_auth_pass", OPTION_STRING, &option_http_proxy_auth_pass },
{ "font_size", OPTION_INTEGER, &option_font_size },
{ "font_min_size", OPTION_INTEGER, &option_font_min_size },
{ "font_sans", OPTION_STRING, &option_font_sans },
{ "font_serif", OPTION_STRING, &option_font_serif },
{ "font_mono", OPTION_STRING, &option_font_mono },
{ "font_cursive", OPTION_STRING, &option_font_cursive },
{ "font_fantasy", OPTION_STRING, &option_font_fantasy },
{ "accept_language", OPTION_STRING, &option_accept_language },
{ "accept_charset", OPTION_STRING, &option_accept_charset },
{ "memory_cache_size", OPTION_INTEGER, &option_memory_cache_size },
{ "disc_cache_age", OPTION_INTEGER, &option_disc_cache_age },
{ "block_advertisements", OPTION_BOOL, &option_block_ads },
{ "minimum_gif_delay", OPTION_INTEGER, &option_minimum_gif_delay },
{ "send_referer", OPTION_BOOL, &option_send_referer },
{ "animate_images", OPTION_BOOL, &option_animate_images },
{ "expire_url", OPTION_INTEGER, &option_expire_url },
{ "font_default", OPTION_INTEGER, &option_font_default },
{ "ca_bundle", OPTION_STRING, &option_ca_bundle },
{ "ca_path", OPTION_STRING, &option_ca_path },
{ "cookie_file", OPTION_STRING, &option_cookie_file },
{ "cookie_jar", OPTION_STRING, &option_cookie_jar },
{ "homepage_url", OPTION_STRING, &option_homepage_url },
{ "url_suggestion", OPTION_BOOL, &option_url_suggestion },
{ "window_x", OPTION_INTEGER, &option_window_x },
{ "window_y", OPTION_INTEGER, &option_window_y },
{ "window_width", OPTION_INTEGER, &option_window_width },
{ "window_height", OPTION_INTEGER, &option_window_height },
{ "window_screen_width", OPTION_INTEGER, &option_window_screen_width },
{ "window_screen_height", OPTION_INTEGER, &option_window_screen_height },
{ "toolbar_status_size", OPTION_INTEGER, &option_toolbar_status_width },
/* Fetcher options */
{ "max_fetchers", OPTION_INTEGER, &option_max_fetchers },
{ "max_fetchers_per_host",
OPTION_INTEGER, &option_max_fetchers_per_host },
{ "max_cached_fetch_handles",
OPTION_INTEGER, &option_max_cached_fetch_handles },
{ "target_blank",
OPTION_BOOL, &option_target_blank },
EXTRA_OPTION_TABLE
};
#define option_table_entries (sizeof option_table / sizeof option_table[0])
static void options_load_tree_directory(xmlNode *ul, struct node *directory);
static void options_load_tree_entry(xmlNode *li, struct node *directory);
xmlNode *options_find_tree_element(xmlNode *node, const char *name);
bool options_save_tree_directory(struct node *directory, xmlNode *node);
bool options_save_tree_entry(struct node *entry, xmlNode *node);
/**
* Read options from a file.
*
* \param path name of file to read options from
*
* Option variables corresponding to lines in the file are updated. Missing
* options are unchanged. If the file fails to open, options are unchanged.
*/
void options_read(const char *path)
{
char s[100];
FILE *fp;
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;
switch (option_table[i].type) {
case OPTION_BOOL:
*((bool *) option_table[i].p) =
value[0] == '1';
break;
case OPTION_INTEGER:
*((int *) option_table[i].p) =
atoi(value);
break;
case OPTION_STRING:
free(*((char **) option_table[i].p));
*((char **) option_table[i].p) =
strdup(value);
break;
}
break;
}
}
fclose(fp);
if (option_font_size < 50)
option_font_size = 50;
if (1000 < option_font_size)
option_font_size = 1000;
if (option_font_min_size < 10)
option_font_min_size = 10;
if (500 < option_font_min_size)
option_font_min_size = 500;
if (option_memory_cache_size < 0)
option_memory_cache_size = 0;
}
/**
* Save options to a file.
*
* \param path name of file to write options to
*
* Errors are ignored.
*/
void options_write(const char *path)
{
unsigned int i;
FILE *fp;
fp = fopen(path, "w");
if (!fp) {
LOG(("failed to open file '%s' for writing", path));
return;
}
for (i = 0; i != option_table_entries; i++) {
fprintf(fp, "%s:", option_table[i].key);
switch (option_table[i].type) {
case OPTION_BOOL:
fprintf(fp, "%c", *((bool *) option_table[i].p) ?
'1' : '0');
break;
case OPTION_INTEGER:
fprintf(fp, "%i", *((int *) option_table[i].p));
break;
case OPTION_STRING:
if (*((char **) option_table[i].p))
fprintf(fp, "%s", *((char **) option_table[i].p));
break;
}
fprintf(fp, "\n");
}
fclose(fp);
}
/**
* Dump user options to stderr
*/
void options_dump(void)
{
unsigned int i;
for (i = 0; i != option_table_entries; i++) {
fprintf(stderr, "%s:", option_table[i].key);
switch (option_table[i].type) {
case OPTION_BOOL:
fprintf(stderr, "%c",
*((bool *) option_table[i].p) ?
'1' : '0');
break;
case OPTION_INTEGER:
fprintf(stderr, "%i",
*((int *) option_table[i].p));
break;
case OPTION_STRING:
if (*((char **) option_table[i].p))
fprintf(stderr, "%s",
*((char **) option_table[i].p));
break;
}
fprintf(stderr, "\n");
}
}
/**
* Loads a hotlist as a tree from a specified file.
*
* \param filename name of file to read
* \return the hotlist file represented as a tree, or NULL on failure
*/
struct tree *options_load_tree(const char *filename) {
xmlDoc *doc;
xmlNode *html, *body, *ul;
struct tree *tree;
doc = htmlParseFile(filename, "iso-8859-1");
if (!doc) {
warn_user("HotlistLoadError", messages_get("ParsingFail"));
return NULL;
}
html = options_find_tree_element((xmlNode *) doc, "html");
body = options_find_tree_element(html, "body");
ul = options_find_tree_element(body, "ul");
if (!ul) {
xmlFreeDoc(doc);
warn_user("HotlistLoadError",
"(<html>...<body>...<ul> not found.)");
return NULL;
}
tree = calloc(sizeof(struct tree), 1);
if (!tree) {
xmlFreeDoc(doc);
warn_user("NoMemory", 0);
return NULL;
}
tree->root = tree_create_folder_node(NULL, "Root");
if (!tree->root) return NULL;
options_load_tree_directory(ul, tree->root);
tree->root->expanded = true;
tree_initialise(tree);
xmlFreeDoc(doc);
return tree;
}
/**
* Parse a directory represented as a ul.
*
* \param ul xmlNode for parsed ul
* \param directory directory to add this directory to
*/
void options_load_tree_directory(xmlNode *ul, struct node *directory) {
char *title;
struct node *dir;
xmlNode *n;
assert(ul);
assert(directory);
for (n = ul->children; n; n = n->next) {
/* The ul may contain entries as a li, or directories as
* an h4 followed by a ul. Non-element nodes may be present
* (eg. text, comments), and are ignored. */
if (n->type != XML_ELEMENT_NODE)
continue;
if (strcmp(n->name, "li") == 0) {
/* entry */
options_load_tree_entry(n, directory);
} else if (strcmp(n->name, "h4") == 0) {
/* directory */
title = (char *) xmlNodeGetContent(n);
if (!title) {
warn_user("HotlistLoadError", "(Empty <h4> "
"or memory exhausted.)");
return;
}
for (n = n->next;
n && n->type != XML_ELEMENT_NODE;
n = n->next)
;
if (!n || strcmp(n->name, "ul") != 0) {
/* next element isn't expected ul */
free(title);
warn_user("HotlistLoadError", "(Expected "
"<ul> not present.)");
return;
}
dir = tree_create_folder_node(directory, title);
if (!dir)
return;
options_load_tree_directory(n, dir);
}
}
}
/**
* Parse an entry represented as a li.
*
* \param li xmlNode for parsed li
* \param directory directory to add this entry to
*/
void options_load_tree_entry(xmlNode *li, struct node *directory) {
char *url = 0;
char *title = 0;
struct node *entry;
xmlNode *n;
const struct url_data *data;
for (n = li->children; n; n = n->next) {
/* The li must contain an "a" element */
if (n->type == XML_ELEMENT_NODE &&
strcmp(n->name, "a") == 0) {
url = (char *) xmlGetProp(n, (const xmlChar *) "href");
title = (char *) xmlNodeGetContent(n);
}
}
if (!url || !title) {
warn_user("HotlistLoadError", "(Missing <a> in <li> or "
"memory exhausted.)");
return;
}
data = urldb_get_url_data(url);
if (!data) {
/* No entry in database, so add one */
urldb_add_url(url);
/* now attempt to get url data */
data = urldb_get_url_data(url);
}
if (!data)
return;
/* Make this URL persistent */
urldb_set_url_persistence(url, true);
if (!data->title)
urldb_set_url_title(url, title);
entry = tree_create_URL_node(directory, url, data, title);
xmlFree(url);
xmlFree(title);
}
/**
* Search the children of an xmlNode for an element.
*
* \param node xmlNode to search children of, or 0
* \param name name of element to find
* \return first child of node which is an element and matches name, or
* 0 if not found or parameter node is 0
*/
xmlNode *options_find_tree_element(xmlNode *node, const char *name) {
xmlNode *n;
if (!node)
return 0;
for (n = node->children;
n && !(n->type == XML_ELEMENT_NODE &&
strcmp(n->name, name) == 0);
n = n->next)
;
return n;
}
/**
* Perform a save to a specified file
*
* /param filename the file to save to
*/
bool options_save_tree(struct tree *tree, const char *filename, const char *page_title) {
int res;
xmlDoc *doc;
xmlNode *html, *head, *title, *body;
/* Unfortunately the Browse Hotlist format is invalid HTML,
* so this is a lie. */
doc = htmlNewDoc("http://www.w3.org/TR/html4/strict.dtd",
"-//W3C//DTD HTML 4.01//EN");
if (!doc) {
warn_user("NoMemory", 0);
return false;
}
html = xmlNewNode(NULL, "html");
if (!html) {
warn_user("NoMemory", 0);
xmlFreeDoc(doc);
return false;
}
xmlDocSetRootElement(doc, html);
head = xmlNewChild(html, NULL, "head", NULL);
if (!head) {
warn_user("NoMemory", 0);
xmlFreeDoc(doc);
return false;
}
title = xmlNewTextChild(head, NULL, "title", page_title);
if (!title) {
warn_user("NoMemory", 0);
xmlFreeDoc(doc);
return false;
}
body = xmlNewChild(html, NULL, "body", NULL);
if (!body) {
warn_user("NoMemory", 0);
xmlFreeDoc(doc);
return false;
}
if (!options_save_tree_directory(tree->root, body)) {
warn_user("NoMemory", 0);
xmlFreeDoc(doc);
return false;
}
doc->charset = XML_CHAR_ENCODING_UTF8;
res = htmlSaveFileEnc(filename, doc, "iso-8859-1");
if (res == -1) {
warn_user("HotlistSaveError", 0);
xmlFreeDoc(doc);
return false;
}
xmlFreeDoc(doc);
return true;
}
/**
* Add a directory to the HTML tree for saving.
*
* \param directory hotlist directory to add
* \param node node to add ul to
* \return true on success, false on memory exhaustion
*/
bool options_save_tree_directory(struct node *directory, xmlNode *node) {
struct node *child;
xmlNode *ul, *h4;
ul = xmlNewChild(node, NULL, "ul", NULL);
if (!ul)
return false;
for (child = directory->child; child; child = child->next) {
if (!child->folder) {
/* entry */
if (!options_save_tree_entry(child, ul))
return false;
} else {
/* directory */
/* invalid HTML */
h4 = xmlNewTextChild(ul, NULL, "h4", child->data.text);
if (!h4)
return false;
if (!options_save_tree_directory(child, ul))
return false;
} }
return true;
}
/**
* Add an entry to the HTML tree for saving.
*
* The node must contain a sequence of node_elements in the following order:
*
* \param entry hotlist entry to add
* \param node node to add li to
* \return true on success, false on memory exhaustion
*/
bool options_save_tree_entry(struct node *entry, xmlNode *node) {
xmlNode *li, *a;
xmlAttr *href;
struct node_element *element;
li = xmlNewChild(node, NULL, "li", NULL);
if (!li)
return false;
a = xmlNewTextChild(li, NULL, "a", entry->data.text);
if (!a)
return false;
element = tree_find_element(entry, TREE_ELEMENT_URL);
if (!element)
return false;
href = xmlNewProp(a, "href", element->text);
if (!href)
return false;
return true;
}
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