| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/metrics/desktop_session_duration/audible_contents_tracker.h" |
| |
| #include "chrome/browser/metrics/desktop_session_duration/desktop_session_duration_tracker.h" |
| #include "chrome/browser/ui/browser.h" |
| #include "chrome/browser/ui/browser_list.h" |
| #include "chrome/browser/ui/recently_audible_helper.h" |
| #include "chrome/browser/ui/tabs/tab_strip_model.h" |
| |
| namespace metrics { |
| |
| AudibleContentsTracker::AudibleContentsTracker(Observer* observer) |
| : observer_(observer) { |
| BrowserList* browser_list = BrowserList::GetInstance(); |
| for (Browser* browser : *browser_list) |
| browser->tab_strip_model()->AddObserver(this); |
| browser_list->AddObserver(this); |
| } |
| |
| AudibleContentsTracker::~AudibleContentsTracker() { |
| BrowserList::GetInstance()->RemoveObserver(this); |
| } |
| |
| void AudibleContentsTracker::OnBrowserAdded(Browser* browser) { |
| browser->tab_strip_model()->AddObserver(this); |
| } |
| |
| void AudibleContentsTracker::OnBrowserRemoved(Browser* browser) { |
| browser->tab_strip_model()->RemoveObserver(this); |
| } |
| |
| void AudibleContentsTracker::OnTabStripModelChanged( |
| TabStripModel* tab_strip_model, |
| const TabStripModelChange& change, |
| const TabStripSelectionChange& selection) { |
| if (change.type() != TabStripModelChange::kRemoved && |
| change.type() != TabStripModelChange::kReplaced) |
| return; |
| |
| for (const auto& delta : change.deltas()) { |
| content::WebContents* removed_contents = nullptr; |
| content::WebContents* added_contents = nullptr; |
| if (change.type() == TabStripModelChange::kReplaced) { |
| removed_contents = delta.replace.old_contents; |
| added_contents = delta.replace.new_contents; |
| } else if (delta.remove.will_be_deleted) { |
| removed_contents = delta.remove.contents; |
| } |
| |
| if (removed_contents) |
| RemoveAudibleWebContents(removed_contents); |
| |
| if (added_contents) { |
| auto* audible_helper = |
| RecentlyAudibleHelper::FromWebContents(added_contents); |
| if (audible_helper->WasRecentlyAudible()) |
| AddAudibleWebContents(added_contents); |
| } |
| } |
| } |
| |
| void AudibleContentsTracker::TabChangedAt(content::WebContents* web_contents, |
| int index, |
| TabChangeType change_type) { |
| // Ignore 'loading' and 'title' changes. |
| if (change_type != TabChangeType::kAll) |
| return; |
| |
| auto* audible_helper = RecentlyAudibleHelper::FromWebContents(web_contents); |
| if (audible_helper->WasRecentlyAudible()) |
| AddAudibleWebContents(web_contents); |
| else |
| RemoveAudibleWebContents(web_contents); |
| } |
| |
| void AudibleContentsTracker::AddAudibleWebContents( |
| content::WebContents* web_contents) { |
| // The first web contents to become audible indicates that audio has started. |
| bool added = audible_contents_.insert(web_contents).second; |
| if (added && audible_contents_.size() == 1) |
| observer_->OnAudioStart(); |
| } |
| |
| void AudibleContentsTracker::RemoveAudibleWebContents( |
| content::WebContents* web_contents) { |
| // If the web content was previously audible and there are no other audible |
| // web contents then notify that audio ended. |
| bool removed = (audible_contents_.erase(web_contents) == 1); |
| if (removed && audible_contents_.empty()) |
| observer_->OnAudioEnd(); |
| } |
| |
| } // namespace metrics |