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/*
* Copyright 2007 James Bursa <bursa@users.sourceforge.net>
* Copyright 2009 Mark Benjamin <netsurf-browser.org.MarkBenjamin@dfgh.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/>.
*/
#include <string.h>
#include "content/fetch.h"
#include "content/fetchcache.h"
#include "render/favicon.h"
#include "render/html.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/talloc.h"
#include "utils/url.h"
#include "utils/utils.h"
static char *favicon_get_icon_ref(struct content *c, xmlNode *html);
static void favicon_callback(content_msg msg, struct content *icon,
intptr_t p1, intptr_t p2, union content_msg_data data);
/**
* retrieve 1 url reference to 1 favicon
* \param html xml node of html element
* \return pointer to url; NULL for no icon; caller owns returned pointer
*/
char *favicon_get_icon_ref(struct content *c, xmlNode *html)
{
xmlNode *node;
char *rel, *href, *url, *url2;
url2 = NULL;
url_func_result res;
union content_msg_data msg_data;
node = html;
while (node) {
if (node->children) { /* children */
node = node->children;
} else if (node->next) { /* siblings */
node = node->next;
} else { /* ancestor siblings */
while (node && !node->next)
node = node->parent;
if (!node)
break;
node = node->next;
}
assert(node);
if (node->type != XML_ELEMENT_NODE)
continue;
if (strcmp((const char *) node->name, "link") == 0) {
/* rel=<space separated list, including 'icon'> */
if ((rel = (char *) xmlGetProp(node,
(const xmlChar *) "rel")) == NULL)
continue;
if (strcasestr(rel, "icon") == 0) {
xmlFree(rel);
continue;
}
LOG(("icon node found"));
if (strcasecmp(rel, "apple-touch-icon") == 0) {
xmlFree(rel);
continue;
}
xmlFree(rel);
if (( href = (char *) xmlGetProp(node,
(const xmlChar *) "href")) == NULL)
continue;
res = url_join(href, c->data.html.base_url,
&url);
xmlFree(href);
if (res != URL_FUNC_OK)
continue;
LOG(("most recent favicon '%s'", url));
if (url2 != NULL) {
free(url2);
url2 = NULL;
}
res = url_normalize(url, &url2);
free(url);
if (res != URL_FUNC_OK) {
url2 = NULL;
if (res == URL_FUNC_NOMEM)
goto no_memory;
continue;
}
}
}
if (url2 == NULL) {
char *scheme;
/* There was no icon link defined in the HTML source data.
* If the HTML document's base URL uses either the HTTP or
* HTTPS schemes, then try using "<scheme>://host/favicon.ico"
*/
if (url_scheme(c->data.html.base_url, &scheme) != URL_FUNC_OK)
return NULL;
if (strcasecmp(scheme, "http") != 0 &&
strcasecmp(scheme, "https") != 0) {
free(scheme);
return NULL;
}
free(scheme);
if (url_join("/favicon.ico", c->data.html.base_url, &url2)
!= URL_FUNC_OK)
return NULL;
}
LOG(("favicon %s", url2));
return url2;
no_memory:
msg_data.error = messages_get("NoMemory");
/* content_broadcast(c, CONTENT_MSG_ERROR, msg_data); */
return false;
}
/**
* retrieve 1 favicon
* \param c content structure
* \param html xml node of html element
* \return true for success, false for error
*/
bool favicon_get_icon(struct content *c, xmlNode *html)
{
char *url = favicon_get_icon_ref(c, html);
struct content *favcontent = NULL;
if (url == NULL)
return false;
favcontent = fetchcache(url, favicon_callback, (intptr_t) c, 0,
c->width, c->height, true, 0, 0, false, false);
free(url);
if (favcontent == NULL)
return false;
c->data.html.favicon = favcontent;
fetchcache_go(favcontent, c->url, favicon_callback, (intptr_t) c, 0,
c->width, c->height, 0, 0, false, c);
return true;
}
/**
* Callback for fetchcache() for linked favicon
*/
void favicon_callback(content_msg msg, struct content *icon,
intptr_t p1, intptr_t p2, union content_msg_data data)
{
struct content *c = (struct content *) p1;
unsigned int i = p2;
switch (msg) {
case CONTENT_MSG_LOADING:
/* check that the favicon is really a correct image type */
if (!((icon->type == CONTENT_ICO) ||
(icon->type == CONTENT_PNG) ||
(icon->type == CONTENT_GIF))) {
c->data.html.favicon = 0;
LOG(("%s is not a favicon", icon->url));
content_add_error(c, "NotFavIco", 0);
html_set_status(c, messages_get("NotFavIco"));
content_broadcast(c, CONTENT_MSG_STATUS, data);
content_remove_user(icon,
favicon_callback,
(intptr_t) c, i);
if (!icon->user_list->next) {
/* we were the only user and we don't want this
* content, so stop it fetching and mark it as
* having an error so it gets removed from the
* cache next time content_clean() gets called
*/
fetch_abort(icon->fetch);
icon->fetch = 0;
icon->status = CONTENT_STATUS_ERROR;
}
}
break;
case CONTENT_MSG_READY:
break;
case CONTENT_MSG_DONE:
LOG(("got favicon '%s'", icon->url));
break;
case CONTENT_MSG_LAUNCH:
/* Fall through */
case CONTENT_MSG_ERROR:
LOG(("favicon %s failed: %s", icon->url, data.error));
/* The favicon we were fetching may have been
* redirected, in that case, the object pointers
* will differ, so ensure that the object that's
* in error is still in use by us before invalidating
* the pointer */
if (c->data.html.favicon == icon) {
c->data.html.favicon = 0;
content_add_error(c, "?", 0);
}
break;
case CONTENT_MSG_STATUS:
html_set_status(c, icon->status_message);
content_broadcast(c, CONTENT_MSG_STATUS, data);
break;
case CONTENT_MSG_NEWPTR:
c->data.html.favicon = icon;
break;
case CONTENT_MSG_AUTH:
c->data.html.favicon = 0;
content_add_error(c, "?", 0);
break;
case CONTENT_MSG_SSL:
c->data.html.favicon = 0;
content_add_error(c, "?", 0);
break;
case CONTENT_MSG_REDRAW:
/* currently no support for favicon animations */
case CONTENT_MSG_REFRESH:
break;
case CONTENT_MSG_REFORMAT:
/* would be unusual :) */
break;
default:
assert(0);
}
}
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