gecko-dev/dom/base/FeedWriterEnabled.h
2015-05-03 15:32:37 -04:00

49 lines
1.3 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "js/TypeDecls.h"
#include "nsGlobalWindow.h"
#include "nsIPrincipal.h"
#include "nsIURI.h"
#include "nsString.h"
#include "xpcpublic.h"
namespace mozilla {
struct FeedWriterEnabled {
static bool IsEnabled(JSContext* cx, JSObject* aGlobal)
{
// Make sure the global is a window
nsGlobalWindow* win = xpc::WindowGlobalOrNull(aGlobal);
if (!win) {
return false;
}
// Make sure that the principal is about:feeds.
nsCOMPtr<nsIPrincipal> principal = win->GetPrincipal();
NS_ENSURE_TRUE(principal, false);
nsCOMPtr<nsIURI> uri;
principal->GetURI(getter_AddRefs(uri));
if (!uri) {
return false;
}
// First check the scheme to avoid getting long specs in the common case.
bool isAbout = false;
uri->SchemeIs("about", &isAbout);
if (!isAbout) {
return false;
}
// Now check the spec itself
nsAutoCString spec;
uri->GetSpec(spec);
return spec.EqualsLiteral("about:feeds");
}
};
}