1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_ 6#define CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_ 7 8#include <list> 9 10#include "base/callback_forward.h" 11#include "base/memory/scoped_ptr.h" 12#include "content/public/common/manifest.h" 13#include "content/public/renderer/render_frame_observer.h" 14 15class GURL; 16 17namespace blink { 18class WebURLResponse; 19} 20 21namespace content { 22 23class ManifestFetcher; 24 25// The ManifestManager is a helper class that takes care of fetching and parsing 26// the Manifest of the associated RenderFrame. It uses the ManifestFetcher and 27// the ManifestParser in order to do so. 28// There are two expected consumers of this helper: ManifestManagerHost, via IPC 29// messages and callers inside the renderer process. The latter should use 30// GetManifest(). 31class ManifestManager : public RenderFrameObserver { 32 public: 33 typedef base::Callback<void(const Manifest&)> GetManifestCallback; 34 35 explicit ManifestManager(RenderFrame* render_frame); 36 virtual ~ManifestManager(); 37 38 // Will call the given |callback| with the Manifest associated with the 39 // RenderFrame if any. Will pass an empty Manifest in case of error. 40 void GetManifest(const GetManifestCallback& callback); 41 42 // RenderFrameObserver implementation. 43 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 44 virtual void DidChangeManifest() OVERRIDE; 45 46 private: 47 enum ResolveState { 48 ResolveStateSuccess, 49 ResolveStateFailure 50 }; 51 52 // Called when receiving a ManifestManagerMsg_RequestManifest from the browser 53 // process. 54 void OnRequestManifest(int request_id); 55 void OnRequestManifestComplete(int request_id, const Manifest&); 56 57 void FetchManifest(); 58 void OnManifestFetchComplete(const GURL& document_url, 59 const blink::WebURLResponse& response, 60 const std::string& data); 61 void ResolveCallbacks(ResolveState state); 62 63 scoped_ptr<ManifestFetcher> fetcher_; 64 65 // Whether the RenderFrame may have an associated Manifest. If true, the frame 66 // may have a manifest, if false, it can't have one. This boolean is true when 67 // DidChangeManifest() is called, if it is never called, it means that the 68 // associated document has no <link rel='manifest'>. 69 bool may_have_manifest_; 70 71 // Whether the current Manifest is dirty. 72 bool manifest_dirty_; 73 74 // Current Manifest. Might be outdated if manifest_dirty_ is true. 75 Manifest manifest_; 76 77 std::list<GetManifestCallback> pending_callbacks_; 78 79 DISALLOW_COPY_AND_ASSIGN(ManifestManager); 80}; 81 82} // namespace content 83 84#endif // CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_H_ 85