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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 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_META_TAG_OBSERVER_H_ | 5 #ifndef CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_ |
6 #define CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_ | 6 #define CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_ |
7 | 7 |
8 #include "content/public/browser/web_contents_observer.h" | 8 #include "content/public/browser/web_contents_observer.h" |
9 | 9 |
10 class GURL; | 10 class GURL; |
11 | 11 |
12 // Retrieves the content of a particular meta tag when a page has fully loaded. | 12 // Retrieves the content of a particular meta tag when a page has fully loaded. |
13 // Subclasses must implement |HandleMetaTagContent|, which gets called after | 13 // Subclasses must implement |HandleMetaTagContent|, which gets called after |
14 // the DOM has been scanned for the tag. | 14 // the DOM has been scanned for the tag. |
15 class MetaTagObserver : public content::WebContentsObserver { | 15 class MetaTagObserver : public content::WebContentsObserver { |
16 public: | 16 public: |
17 explicit MetaTagObserver(const std::string& meta_tag); | 17 explicit MetaTagObserver(const std::string& meta_tag); |
18 virtual ~MetaTagObserver(); | 18 virtual ~MetaTagObserver(); |
19 | 19 |
20 // content::WebContentsObserver overrides: | 20 // content::WebContentsObserver overrides: |
21 virtual void DidFinishLoad(content::RenderFrameHost* render_frame_host, | 21 virtual void DidFinishLoad(content::RenderFrameHost* render_frame_host, |
22 const GURL& validated_url) OVERRIDE; | 22 const GURL& validated_url) override; |
23 | 23 |
24 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; | 24 virtual bool OnMessageReceived(const IPC::Message& message) override; |
25 | 25 |
26 protected: | 26 protected: |
27 // Called when the meta tag's content has been retrieved successfully. | 27 // Called when the meta tag's content has been retrieved successfully. |
28 virtual void HandleMetaTagContent(const std::string& tag_content, | 28 virtual void HandleMetaTagContent(const std::string& tag_content, |
29 const GURL& expected_url) = 0; | 29 const GURL& expected_url) = 0; |
30 | 30 |
31 private: | 31 private: |
32 // Called when the renderer has returned information about the meta tag. | 32 // Called when the renderer has returned information about the meta tag. |
33 void OnDidRetrieveMetaTagContent(bool success, | 33 void OnDidRetrieveMetaTagContent(bool success, |
34 const std::string& tag_name, | 34 const std::string& tag_name, |
35 const std::string& tag_content, | 35 const std::string& tag_content, |
36 const GURL& expected_url); | 36 const GURL& expected_url); |
37 | 37 |
38 const std::string meta_tag_; | 38 const std::string meta_tag_; |
39 GURL validated_url_; | 39 GURL validated_url_; |
40 | 40 |
41 DISALLOW_COPY_AND_ASSIGN(MetaTagObserver); | 41 DISALLOW_COPY_AND_ASSIGN(MetaTagObserver); |
42 }; | 42 }; |
43 | 43 |
44 #endif // CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_ | 44 #endif // CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_ |
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