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Side by Side Diff: chrome/browser/metrics/desktop_engagement/desktop_engagement_observer.h

Issue 2333113002: Rename DesktopEngagement* to DesktopSessionDuration*. (Closed)
Patch Set: Change name Created 4 years, 3 months ago
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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
3 // found in the LICENSE file.
4
5 #ifndef CHROME_BROWSER_METRICS_DESKTOP_ENGAGEMENT_DESKTOP_ENGAGEMENT_OBSERVER_H_
6 #define CHROME_BROWSER_METRICS_DESKTOP_ENGAGEMENT_DESKTOP_ENGAGEMENT_OBSERVER_H_
7
8 #include "base/macros.h"
9 #include "content/public/browser/render_widget_host.h"
10 #include "content/public/browser/web_contents.h"
11 #include "content/public/browser/web_contents_observer.h"
12 #include "content/public/browser/web_contents_user_data.h"
13 #include "third_party/WebKit/public/web/WebInputEvent.h"
14
15 namespace metrics {
16
17 class DesktopEngagementService;
18
19 // Tracks user input events from web contents and notifies
20 // |DesktopEngagementService|.
21 class DesktopEngagementObserver
22 : public content::WebContentsObserver,
23 public content::WebContentsUserData<DesktopEngagementObserver>,
24 public content::RenderWidgetHost::InputEventObserver {
25 public:
26 DesktopEngagementObserver(content::WebContents* web_contents,
27 DesktopEngagementService* service);
28 ~DesktopEngagementObserver() override;
29
30 static DesktopEngagementObserver* CreateForWebContents(
31 content::WebContents* web_contents);
32
33 private:
34 friend class content::WebContentsUserData<DesktopEngagementObserver>;
35
36 // Register / Unregister input event callback to given RenderViewHost
37 void RegisterInputEventObserver(content::RenderViewHost* host);
38 void UnregisterInputEventObserver(content::RenderViewHost* host);
39
40 // content::RenderWidgetHost::InputEventObserver:
41 void OnInputEvent(const blink::WebInputEvent& event) override;
42
43 // content::WebContentsObserver:
44 void RenderViewHostChanged(content::RenderViewHost* old_host,
45 content::RenderViewHost* new_host) override;
46
47 DesktopEngagementService* service_;
48
49 DISALLOW_COPY_AND_ASSIGN(DesktopEngagementObserver);
50 };
51
52 } // namespace metrics
53
54 #endif // CHROME_BROWSER_METRICS_DESKTOP_ENGAGEMENT_DESKTOP_ENGAGEMENT_OBSERVER _H_
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