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.
5 #ifndef CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_
6 #define CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_
8 #include "content/public/browser/web_contents_observer.h"
12 // Retrieves the content of a particular meta tag when a page has fully loaded.
13 // Subclasses must implement |HandleMetaTagContent|, which gets called after
14 // the DOM has been scanned for the tag.
15 class MetaTagObserver
: public content::WebContentsObserver
{
17 explicit MetaTagObserver(const std::string
& meta_tag
);
18 virtual ~MetaTagObserver();
20 // content::WebContentsObserver overrides:
21 virtual void DidFinishLoad(content::RenderFrameHost
* render_frame_host
,
22 const GURL
& validated_url
) OVERRIDE
;
24 virtual bool OnMessageReceived(const IPC::Message
& message
) OVERRIDE
;
27 // Called when the meta tag's content has been retrieved successfully.
28 virtual void HandleMetaTagContent(const std::string
& tag_content
,
29 const GURL
& expected_url
) = 0;
32 // Called when the renderer has returned information about the meta tag.
33 void OnDidRetrieveMetaTagContent(bool success
,
34 const std::string
& tag_name
,
35 const std::string
& tag_content
,
36 const GURL
& expected_url
);
38 const std::string meta_tag_
;
41 DISALLOW_COPY_AND_ASSIGN(MetaTagObserver
);
44 #endif // CHROME_BROWSER_ANDROID_META_TAG_OBSERVER_H_