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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ | 5 #ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ |
6 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ | 6 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/callback.h" | 10 #include "base/callback.h" |
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25 // the page loading in the background. It operates on a single thread and | 25 // the page loading in the background. It operates on a single thread and |
26 // needs to run on BrowserThread::UI to work with the PrerenderManager. | 26 // needs to run on BrowserThread::UI to work with the PrerenderManager. |
27 // It supports a single load request at a time. | 27 // It supports a single load request at a time. |
28 class PrerenderingLoader : public PrerenderAdapter::Observer, | 28 class PrerenderingLoader : public PrerenderAdapter::Observer, |
29 public SnapshotController::Client { | 29 public SnapshotController::Client { |
30 public: | 30 public: |
31 // Reports status of a load page request with loaded contents if available. | 31 // Reports status of a load page request with loaded contents if available. |
32 typedef base::Callback<void(Offliner::RequestStatus, content::WebContents*)> | 32 typedef base::Callback<void(Offliner::RequestStatus, content::WebContents*)> |
33 LoadPageCallback; | 33 LoadPageCallback; |
34 | 34 |
| 35 typedef base::Callback<void(int64_t)> ProgressCallback; |
| 36 |
35 explicit PrerenderingLoader(content::BrowserContext* browser_context); | 37 explicit PrerenderingLoader(content::BrowserContext* browser_context); |
36 ~PrerenderingLoader() override; | 38 ~PrerenderingLoader() override; |
37 | 39 |
38 // Loads a page in the background if possible and returns whether the | 40 // Loads a page in the background if possible and returns whether the |
39 // request was accepted. If so, the LoadPageCallback will be informed | 41 // request was accepted. If so, the LoadPageCallback will be informed |
40 // of status. Only one load request may exist as a time. If a previous | 42 // of status. Only one load request may exist as a time. If a previous |
41 // request is still in progress it must be stopped before a new | 43 // request is still in progress it must be stopped before a new |
42 // request will be accepted. The callback may be called more than | 44 // request will be accepted. The callback may be called more than |
43 // once - first for a successful load and then if canceled after the | 45 // once - first for a successful load and then if canceled after the |
44 // load (which may be from resources being reclaimed) at which point | 46 // load (which may be from resources being reclaimed) at which point |
45 // the retrieved WebContents should no longer be used. | 47 // the retrieved WebContents should no longer be used. |
46 virtual bool LoadPage(const GURL& url, const LoadPageCallback& callback); | 48 virtual bool LoadPage(const GURL& url, |
| 49 const LoadPageCallback& load_done_callback, |
| 50 const ProgressCallback& progress_callback); |
47 | 51 |
48 // Stops (completes or cancels) the load request. Must be called when | 52 // Stops (completes or cancels) the load request. Must be called when |
49 // LoadPageCallback is done with consuming the contents. May be called | 53 // LoadPageCallback is done with consuming the contents. May be called |
50 // prior to LoadPageCallback in order to cancel the current request (in | 54 // prior to LoadPageCallback in order to cancel the current request (in |
51 // which case the callback will not be run). | 55 // which case the callback will not be run). |
52 // This loader should also be responsible for stopping offline | 56 // This loader should also be responsible for stopping offline |
53 // prerenders when Chrome is transitioned to foreground. | 57 // prerenders when Chrome is transitioned to foreground. |
54 virtual void StopLoading(); | 58 virtual void StopLoading(); |
55 | 59 |
56 // Returns whether the loader is idle and able to accept new LoadPage | 60 // Returns whether the loader is idle and able to accept new LoadPage |
57 // request. | 61 // request. |
58 virtual bool IsIdle(); | 62 virtual bool IsIdle(); |
59 | 63 |
60 // Returns whether the loader has successfully loaded web contents. | 64 // Returns whether the loader has successfully loaded web contents. |
61 // Note that |StopLoading()| should be used to clear this state once | 65 // Note that |StopLoading()| should be used to clear this state once |
62 // the loaded web contents are no longer needed. | 66 // the loaded web contents are no longer needed. |
63 virtual bool IsLoaded(); | 67 virtual bool IsLoaded(); |
64 | 68 |
65 // Overrides the prerender stack adapter for unit testing. | 69 // Overrides the prerender stack adapter for unit testing. |
66 void SetAdapterForTesting( | 70 void SetAdapterForTesting( |
67 std::unique_ptr<PrerenderAdapter> prerender_adapter); | 71 std::unique_ptr<PrerenderAdapter> prerender_adapter); |
68 | 72 |
69 // PrerenderAdapter::Observer implementation: | 73 // PrerenderAdapter::Observer implementation: |
70 void OnPrerenderStopLoading() override; | 74 void OnPrerenderStopLoading() override; |
71 void OnPrerenderDomContentLoaded() override; | 75 void OnPrerenderDomContentLoaded() override; |
72 void OnPrerenderStop() override; | 76 void OnPrerenderStop() override; |
| 77 void OnPrerenderNetworkBytesChanged(int64_t bytes) override; |
73 | 78 |
74 // SnapshotController::Client implementation: | 79 // SnapshotController::Client implementation: |
75 void StartSnapshot() override; | 80 void StartSnapshot() override; |
76 | 81 |
77 private: | 82 private: |
78 // State of the loader (only one request may be active at a time). | 83 // State of the loader (only one request may be active at a time). |
79 enum class State { | 84 enum class State { |
80 IDLE, // No active load request. | 85 IDLE, // No active load request. |
81 PENDING, // Load request is pending the start of prerendering. | 86 PENDING, // Load request is pending the start of prerendering. |
82 LOADING, // Loading in progress. | 87 LOADING, // Loading in progress. |
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107 | 112 |
108 // Adapter for handling calls to the prerender stack. | 113 // Adapter for handling calls to the prerender stack. |
109 std::unique_ptr<PrerenderAdapter> adapter_; | 114 std::unique_ptr<PrerenderAdapter> adapter_; |
110 | 115 |
111 // A WebContents for the active load request that is used to hold the session | 116 // A WebContents for the active load request that is used to hold the session |
112 // storage namespace for rendering. This will NOT have the loaded page. | 117 // storage namespace for rendering. This will NOT have the loaded page. |
113 std::unique_ptr<content::WebContents> session_contents_; | 118 std::unique_ptr<content::WebContents> session_contents_; |
114 | 119 |
115 // Callback to call when the active load request completes, fails, or is | 120 // Callback to call when the active load request completes, fails, or is |
116 // canceled. | 121 // canceled. |
117 LoadPageCallback callback_; | 122 LoadPageCallback load_done_callback_; |
| 123 |
| 124 // Callback to call when we know more bytes have loaded from the network. |
| 125 ProgressCallback progress_callback_; |
118 | 126 |
119 DISALLOW_COPY_AND_ASSIGN(PrerenderingLoader); | 127 DISALLOW_COPY_AND_ASSIGN(PrerenderingLoader); |
120 }; | 128 }; |
121 | 129 |
122 } // namespace offline_pages | 130 } // namespace offline_pages |
123 | 131 |
124 #endif // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ | 132 #endif // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_ |
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