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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_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_
#define CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_
#include "base/callback_forward.h"
#include "base/id_map.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
class RenderFrameHost;
class WebContents;
struct Manifest;
// ManifestManagerHost is a helper class that allows callers to get the Manifest
// associated with a frame. It handles the IPC messaging with the child process.
// TODO(mlamouri): keep a cached version and a dirty bit here.
class ManifestManagerHost : public WebContentsObserver {
public:
explicit ManifestManagerHost(WebContents* web_contents);
~ManifestManagerHost() override;
typedef base::Callback<void(const Manifest&)> GetManifestCallback;
// Calls the given callback with the manifest associated with the
// given RenderFrameHost. If the frame has no manifest or if getting it failed
// the callback will have an empty manifest.
void GetManifest(RenderFrameHost*, const GetManifestCallback&);
// WebContentsObserver
bool OnMessageReceived(const IPC::Message&, RenderFrameHost*) override;
void RenderFrameDeleted(RenderFrameHost*) override;
private:
typedef IDMap<GetManifestCallback, IDMapOwnPointer> CallbackMap;
typedef base::hash_map<RenderFrameHost*, CallbackMap*> FrameCallbackMap;
void OnRequestManifestResponse(
RenderFrameHost*, int request_id, const Manifest&);
// Returns the CallbackMap associated with the given RenderFrameHost, or null.
CallbackMap* GetCallbackMapForFrame(RenderFrameHost*);
FrameCallbackMap pending_callbacks_;
DISALLOW_COPY_AND_ASSIGN(ManifestManagerHost);
};
} // namespace content
#endif // CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_
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