/* CSS module management *//* $Id: css.c,v 1.52.2.1 2005/01/04 00:42:56 jonas Exp $ */#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <stdlib.h>#include "elinks.h"#include "cache/cache.h"#include "config/options.h"#include "document/css/css.h"#include "document/css/parser.h"#include "document/css/stylesheet.h"#include "encoding/encoding.h"#include "intl/gettext/libintl.h"#include "lowlevel/home.h"#include "modules/module.h"#include "protocol/uri.h"#include "sched/connection.h"#include "util/error.h"#include "util/memory.h"#include "viewer/text/draw.h"struct option_info css_options_info[] = {	INIT_OPT_TREE("document", N_("Cascading Style Sheets"),		"css", OPT_SORT,		N_("Options concerning how to use CSS for styling documents.")),	INIT_OPT_BOOL("document.css", N_("Enable CSS"),		"enable", 0, 1,		N_("Enable adding of CSS style info to documents.")),	INIT_OPT_BOOL("document.css", N_("Import external style sheets"),		"import", 0, 1,		N_("When enabled any external style sheets that are imported from\n"		"either CSS itself using the @import keyword or from the HTML using\n"		"<link> tags in the document header will also be downloaded.")),	INIT_OPT_STRING("document.css", N_("Default style sheet"),		"stylesheet", 0, "",		N_("The path to the file containing the default user defined\n"		"Cascading Style Sheet. It can be used to control the basic\n"		"layout of HTML documents. The path is assumed to be relative\n"		"to ELinks' home directory.\n"		"Leave as \"\" to use built-in document styling.")),	NULL_OPTION_INFO,};voidimport_css(struct css_stylesheet *css, struct uri *uri){	/* Do we have it in the cache? (TODO: CSS cache) */	struct cache_entry *cached;	struct fragment *fragment;	if (!uri || css->import_level >= MAX_REDIRECTS)		return;	cached = get_redirected_cache_entry(uri);	if (!cached) return;	fragment = get_cache_fragment(cached);	if (fragment) {		unsigned char *end = fragment->data + fragment->length;		css->import_level++;		css_parse_stylesheet(css, uri, fragment->data, end);		css->import_level--;	}}static voidimport_css_file(struct css_stylesheet *css, struct uri *base_uri,		unsigned char *url, int urllen){	struct string string, filename;	if (!*url	    || css->import_level >= MAX_REDIRECTS	    || !init_string(&filename))		return;	if (*url != '/' && elinks_home) {		add_to_string(&filename, elinks_home);	}	add_bytes_to_string(&filename, url, urllen);	if (read_encoded_file(&filename, &string) == S_OK) {		unsigned char *end = string.source + string.length;		css->import_level++;		css_parse_stylesheet(css, base_uri, string.source, end);		done_string(&string);		css->import_level--;	}	done_string(&filename);}struct css_stylesheet default_stylesheet = INIT_CSS_STYLESHEET(default_stylesheet, import_css_file);static voidimport_default_css(void){	unsigned char *url = get_opt_str("document.css.stylesheet");	if (!list_empty(default_stylesheet.selectors))		done_css_stylesheet(&default_stylesheet);	if (!*url) return;	import_css_file(&default_stylesheet, NULL, url, strlen(url));}static intchange_hook_css(struct session *ses, struct option *current, struct option *changed){	if (!strcmp(changed->name, "stylesheet")) {		/* TODO: We need to update all entries in format cache. --jonas */		import_default_css();	}	draw_formatted(ses, 1);	return 0;}static voidinit_css(struct module *module){	struct change_hook_info css_change_hooks[] = {		{ "document.css",		change_hook_css },		{ NULL,				NULL },	};	register_change_hooks(css_change_hooks);	import_default_css();}voiddone_css(struct module *module){	done_css_stylesheet(&default_stylesheet);}struct module css_module = struct_module(	/* name: */		N_("Cascading Style Sheets"),	/* options: */		css_options_info,	/* hooks: */		NULL,	/* submodules: */	NULL,	/* data: */		NULL,	/* init: */		init_css,	/* done: */		done_css);