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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_FRAME_REPLICATION_STATE_H_
#define CONTENT_COMMON_FRAME_REPLICATION_STATE_H_
#include "content/common/content_export.h"
#include "url/origin.h"
namespace blink {
enum class WebTreeScopeType;
enum class WebSandboxFlags;
}
namespace content {
// This structure holds information that needs to be replicated between a
// RenderFrame and any of its associated RenderFrameProxies.
struct CONTENT_EXPORT FrameReplicationState {
FrameReplicationState();
FrameReplicationState(blink::WebTreeScopeType scope,
const std::string& name,
blink::WebSandboxFlags sandbox_flags);
~FrameReplicationState();
// Current origin of the frame. This field is updated whenever a frame
// navigation commits.
//
// TODO(alexmos): For now, |origin| updates are immediately sent to all frame
// proxies when in --site-per-process mode. This isn't ideal, since Blink
// typically needs a proxy's origin only when performing security checks on
// the ancestors of a local frame. So, as a future improvement, we could
// delay sending origin updates to proxies until they have a local descendant
// (if ever). This would reduce leaking a user's browsing history into a
// compromized renderer.
url::Origin origin;
// Current sandbox flags of the frame. |sandbox_flags| are initialized for
// new child frames using the value of the <iframe> element's "sandbox"
// attribute. They are updated dynamically whenever a parent frame updates an
// <iframe>'s sandbox attribute via JavaScript.
//
// Updates to |sandbox_flags| are sent to proxies, but only after a
// subsequent navigation of the (sandboxed) frame, since the flags only take
// effect on navigation (see also FrameTreeNode::effective_sandbox_flags_).
// The proxies need updated flags so that they can be inherited properly if a
// proxy ever becomes a parent of a local frame.
blink::WebSandboxFlags sandbox_flags;
// The assigned name of the frame. This name can be empty, unlike the unique
// name generated internally in the DOM tree.
//
// |name| is set when a new child frame is created using the value of the
// <iframe> element's "name" attribute (see
// RenderFrameHostImpl::OnCreateChildFrame), and it is updated dynamically
// whenever a frame sets its window.name.
//
// |name| updates are immediately sent to all frame proxies (when in
// --site-per-process mode), so that other frames can look up or navigate a
// frame using its updated name (e.g., using window.open(url, frame_name)).
std::string name;
// Whether the frame is in a document tree or a shadow tree, per the Shadow
// DOM spec: https://w3c.github.io/webcomponents/spec/shadow/
// Note: This should really be const, as it can never change once a frame is
// created. However, making it const makes it a pain to embed into IPC message
// params: having a const member implicitly deletes the copy assignment
// operator.
blink::WebTreeScopeType scope;
// TODO(alexmos): Eventually, this structure can also hold other state that
// needs to be replicated, such as frame sizing info.
};
} // namespace content
#endif // CONTENT_COMMON_FRAME_REPLICATION_STATE_H_
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