diff options
Diffstat (limited to 'render/favicon.c')
| -rw-r--r-- | render/favicon.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/render/favicon.c b/render/favicon.c new file mode 100644 index 000000000..fdf6e25f1 --- /dev/null +++ b/render/favicon.c @@ -0,0 +1,232 @@ +/* + * 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); + if (res != URL_FUNC_OK) { + url2 = NULL; + if (res == URL_FUNC_NOMEM) + goto no_memory; + continue; + } + free(url); + + } + } + if (url2 == NULL) { + 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); + } +} |