content/browser/manifest/manifest_manager_host.h

   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_BROWSER_MANIFEST_MANIFEST_MANAGER_HOST_H_
   6 #define CONTENT_BROWSER_MANIFEST_MANIFEST_MANAGER_HOST_H_
   7
   8 #include "base/callback_forward.h"
   9 #include "base/id_map.h"
  10 #include "content/public/browser/web_contents_observer.h"
  11
  12 namespace content {
  13
  14 class RenderFrameHost;
  15 class WebContents;
  16 struct Manifest;
  17
  18 // ManifestManagerHost is a helper class that allows callers to get the Manifest
  19 // associated with a frame. It handles the IPC messaging with the child process.
  20 // TODO(mlamouri): keep a cached version and a dirty bit here.
  21 class ManifestManagerHost : public WebContentsObserver {
  22  public:
  23   explicit ManifestManagerHost(WebContents* web_contents);
  24   ~ManifestManagerHost() override;
  25
  26   typedef base::Callback<void(const Manifest&)> GetManifestCallback;
  27
  28   // Calls the given callback with the manifest associated with the
  29   // given RenderFrameHost. If the frame has no manifest or if getting it failed
  30   // the callback will have an empty manifest.
  31   void GetManifest(RenderFrameHost*, const GetManifestCallback&);
  32
  33   // WebContentsObserver
  34   bool OnMessageReceived(const IPC::Message&, RenderFrameHost*) override;
  35   void RenderFrameDeleted(RenderFrameHost*) override;
  36
  37  private:
  38   typedef IDMap<GetManifestCallback, IDMapOwnPointer> CallbackMap;
  39   typedef base::hash_map<RenderFrameHost*, CallbackMap*> FrameCallbackMap;
  40
  41   void OnRequestManifestResponse(
  42       RenderFrameHost*, int request_id, const Manifest&);
  43
  44   // Returns the CallbackMap associated with the given RenderFrameHost, or null.
  45   CallbackMap* GetCallbackMapForFrame(RenderFrameHost*);
  46
  47   FrameCallbackMap pending_callbacks_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(ManifestManagerHost);
  50 };
  51
  52 } // namespace content
  53
  54 #endif  // CONTENT_BROWSER_MANIFEST_MANIFEST_MANAGER_HOST_H_