offline_load_page.h revision 201ade2fbba22bfb27ae029f4d23fca6ded109a0 
1// Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_OFFLINE_OFFLINE_LOAD_PAGE_H_
6#define CHROME_BROWSER_CHROMEOS_OFFLINE_OFFLINE_LOAD_PAGE_H_
7#pragma once
8
9#include <string>
10
11#include "base/task.h"
12#include "chrome/browser/chromeos/network_state_notifier.h"
13#include "chrome/browser/tab_contents/interstitial_page.h"
14#include "chrome/common/notification_observer.h"
15#include "chrome/common/notification_service.h"
16
17class DictionaryValue;
18class Extension;
19class TabContents;
20
21namespace chromeos {
22
23// OfflineLoadPage class shows the interstitial page that is shown
24// when no network is available and hides when some network (either
25// one of wifi, 3g or ethernet) becomes available.
26// It deletes itself when the interstitial page is closed.
27class OfflineLoadPage : public InterstitialPage {
28 public:
29  // A delegate class that is called when the interstitinal page
30  // is closed.
31  class Delegate {
32   public:
33    Delegate() {}
34    virtual ~Delegate() {}
35    // Called when a user selected to proceed or not to proceed
36    // with loading.
37    virtual void OnBlockingPageComplete(bool proceed) = 0;
38
39   private:
40    DISALLOW_COPY_AND_ASSIGN(Delegate);
41  };
42  static void Show(int process_host_id, int render_view_id,
43                   const GURL& url, Delegate* delegate);
44  // Import show here so that overloading works.
45  using InterstitialPage::Show;
46
47 protected:
48  // Create a offline load page for the |tab_contents|.
49  OfflineLoadPage(TabContents* tab_contents, const GURL& url,
50                  Delegate* delegate);
51  virtual ~OfflineLoadPage() {}
52
53  // Only for testing.
54  void EnableTest() {
55    in_test_ = true;
56  }
57
58 private:
59  // InterstitialPage implementation.
60  virtual std::string GetHTMLContents();
61  virtual void CommandReceived(const std::string& command);
62  virtual void Proceed();
63  virtual void DontProceed();
64
65  // Overrides InterstitialPage's Observe.
66  virtual void Observe(NotificationType type,
67                       const NotificationSource& source,
68                       const NotificationDetails& details);
69
70  // Retrieves template strings of the offline page for app and
71  // normal site.
72  void GetAppOfflineStrings(const Extension* app,
73                            const string16& faield_url,
74                            DictionaryValue* strings) const;
75  void GetNormalOfflineStrings(const string16& faield_url,
76                               DictionaryValue* strings) const;
77
78  // Really proceed with loading.
79  void DoProceed();
80
81  Delegate* delegate_;
82  NotificationRegistrar registrar_;
83
84  // True if the proceed is chosen.
85  bool proceeded_;
86  ScopedRunnableMethodFactory<OfflineLoadPage> method_factory_;
87
88  bool in_test_;
89
90  DISALLOW_COPY_AND_ASSIGN(OfflineLoadPage);
91};
92
93}  // namespace chromeos
94
95#endif  // CHROME_BROWSER_CHROMEOS_OFFLINE_OFFLINE_LOAD_PAGE_H_
96