content/browser/android/deferred_download_observer.h

   1 // Copyright 2015 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_ANDROID_DEFERRED_DOWNLOAD_OBSERVER_H_
   6 #define CONTENT_BROWSER_ANDROID_DEFERRED_DOWNLOAD_OBSERVER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/containers/scoped_ptr_hash_map.h"
  10 #include "content/public/browser/web_contents_observer.h"
  11
  12 namespace content {
  13 class WebContents;
  14
  15 // Class for handling deferred downloads inside a WebContents. In document
  16 // mode, it is possible that a download starts before ContentViewCore gets
  17 // created. This class listens to the WebContentsObserver::WasShown() method
  18 // before running the download tasks to make sure ContentViewCore is attached
  19 // to WebContents.
  20 // TODO(qinmin): Remove this when java Tab object creation is no longer pending
  21 // on Activity creation.
  22 class DeferredDownloadObserver : public WebContentsObserver {
  23  public:
  24   DeferredDownloadObserver(WebContents* web_contents,
  25                            const base::Closure& deferred_download_cb);
  26   ~DeferredDownloadObserver() override;
  27
  28   // WebContentsObserver method.
  29   void WasShown() override;
  30   void WebContentsDestroyed() override;
  31
  32  private:
  33   // Callback to run when WebContents gets shown.
  34   base::Closure deferred_download_cb_;
  35
  36   DISALLOW_COPY_AND_ASSIGN(DeferredDownloadObserver);
  37 };
  38
  39 }  // namespace content
  40
  41 #endif  // CONTENT_BROWSER_ANDROID_DEFERRED_DOWNLOAD_OBSERVER_H_