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/**
* (C) Copyright 2008 Jeremy Maitin-Shepard
* (C) Copyright 2010 John J. Foerch
*
* Portions of this file were derived from Mozilla,
* (C) Copyright 1998-2008 Mozilla Foundation.
*
* Use, modification, and distribution are subject to the terms specified in the
* COPYING file.
**/
const favicon_service = Cc["@mozilla.org/browser/favicon-service;1"]
.getService(Ci.nsIFaviconService);
define_variable("favicon_image_max_size", 1024,
"Maximum (pixel) width and height of an image document that "+
"is considered for use as a favicon.");
{
let favicon_set_internal;
if (version_compare(get_mozilla_version(), "18.0") >= 0) {
favicon_set_internal = function (buffer, icon_url) {
favicon_service.setAndFetchFaviconForPage(
buffer.current_uri, icon_url, false,
favicon_service.FAVICON_LOAD_NON_PRIVATE);
};
} else {
favicon_set_internal = function (buffer, icon_url) {
favicon_service.setAndLoadFaviconForPage(
buffer.current_uri, icon_url, false);
};
}
var favicon_set = function favicon_set (buffer, icon_url) {
favicon_set_internal(buffer, icon_url);
buffer.icon = icon_url.spec;
}
}
function favicon_content_buffer_started_loading (buffer) {
buffer.icon = null;
}
function favicon_content_buffer_finished_loading (buffer) {
if (buffer.icon != null)
return;
if (buffer.document instanceof Ci.nsIImageDocument) {
var req = buffer.document.imageRequest;
if (req && req.image &&
req.image.width <= favicon_image_max_size &&
req.image.height <= favicon_image_max_size)
{
favicon_set(buffer, buffer.current_uri);
return;
}
}
var uri = buffer.current_uri;
// Only load favicons for http and https
if (!uri.schemeIs("http") && !uri.schemeIs("https"))
return;
var icon_url = make_uri(uri.prePath + "/favicon.ico");
if (!favicon_service.isFailedFavicon(icon_url))
favicon_set(buffer, icon_url);
}
function favicon_content_buffer_dom_link_added (buffer, event) {
var link = event.originalTarget;
if (!link || !link.ownerDocument || !link.rel || !link.href ||
link.ownerDocument != buffer.document)
{
return;
}
var rel = link.rel.toLowerCase();
var rel_strings = rel.split(/\s+/);
if (rel_strings.indexOf("icon") == -1)
return;
/* FIXME: perhaps worry about newURI throwing an exception */
var target_doc = link.ownerDocument;
var ios = Cc["@mozilla.org/network/io-service;1"]
.getService(Ci.nsIIOService);
var uri = ios.newURI(link.href, target_doc.characterSet, null);
if (favicon_service.isFailedFavicon(uri))
return;
// Verify that the load of this icon is legal.
// error pages can load their favicon, to be on the safe side,
// only allow chrome:// favicons
const about_neterr = "about:neterror?";
if (target_doc.documentURI.substr(0, about_neterr.length) != about_neterr
|| !uri.schemeIs("chrome"))
{
var ssm = Cc["@mozilla.org/scriptsecuritymanager;1"]
.getService(Ci.nsIScriptSecurityManager);
try {
ssm.checkLoadURIWithPrincipal(
target_doc.nodePrincipal, uri,
Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
} catch(e) {
return;
}
}
try {
} catch(e) {
return; // Refuse to load if we can't do a security check.
}
// Security says okay, now ask content policy
var content_policy_service = Cc["@mozilla.org/layout/content-policy;1"]
.getService(Ci.nsIContentPolicy);
if (content_policy_service.shouldLoad(Ci.nsIContentPolicy.TYPE_IMAGE,
uri, target_doc.documentURIObject,
link, link.type, null)
!= Ci.nsIContentPolicy.ACCEPT)
{
return;
}
favicon_set(buffer, uri);
}
add_hook("content_buffer_started_loading_hook",
favicon_content_buffer_started_loading);
add_hook("content_buffer_finished_loading_hook",
favicon_content_buffer_finished_loading);
add_hook("content_buffer_dom_link_added_hook",
favicon_content_buffer_dom_link_added);
provide("favicon");
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