| // Copyright 2015 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/ui/browser_tab_strip_tracker.h" |
| |
| #include "base/auto_reset.h" |
| #include "chrome/browser/ui/browser.h" |
| #include "chrome/browser/ui/browser_list.h" |
| #include "chrome/browser/ui/browser_tab_strip_tracker_delegate.h" |
| #include "chrome/browser/ui/tabs/tab_strip_model.h" |
| |
| BrowserTabStripTracker::BrowserTabStripTracker( |
| TabStripModelObserver* tab_strip_model_observer, |
| BrowserTabStripTrackerDelegate* delegate, |
| BrowserListObserver* browser_list_observer) |
| : tab_strip_model_observer_(tab_strip_model_observer), |
| delegate_(delegate), |
| browser_list_observer_(browser_list_observer), |
| is_processing_initial_browsers_(false) { |
| DCHECK(tab_strip_model_observer_); |
| } |
| |
| BrowserTabStripTracker::~BrowserTabStripTracker() { |
| for (Browser* browser : browsers_observing_) |
| browser->tab_strip_model()->RemoveObserver(tab_strip_model_observer_); |
| |
| BrowserList::RemoveObserver(this); |
| } |
| |
| void BrowserTabStripTracker::Init() { |
| BrowserList::AddObserver(this); |
| |
| base::AutoReset<bool> restter(&is_processing_initial_browsers_, true); |
| for (auto* browser : *BrowserList::GetInstance()) |
| MaybeTrackBrowser(browser); |
| } |
| |
| void BrowserTabStripTracker::StopObservingAndSendOnBrowserRemoved() { |
| Browsers current_browsers; |
| current_browsers.swap(browsers_observing_); |
| |
| for (Browser* browser : current_browsers) { |
| browser->tab_strip_model()->RemoveObserver(tab_strip_model_observer_); |
| if (browser_list_observer_) |
| browser_list_observer_->OnBrowserRemoved(browser); |
| } |
| } |
| |
| bool BrowserTabStripTracker::ShouldTrackBrowser(Browser* browser) { |
| return !delegate_ || delegate_->ShouldTrackBrowser(browser); |
| } |
| |
| void BrowserTabStripTracker::MaybeTrackBrowser(Browser* browser) { |
| if (!ShouldTrackBrowser(browser)) |
| return; |
| |
| // It's possible that a browser is added to the observed browser list twice. |
| // In this case it might cause crash as seen in crbug.com/685731. |
| if (browsers_observing_.find(browser) != browsers_observing_.end()) |
| return; |
| |
| browsers_observing_.insert(browser); |
| |
| if (browser_list_observer_) |
| browser_list_observer_->OnBrowserAdded(browser); |
| |
| TabStripModel* tab_strip_model = browser->tab_strip_model(); |
| tab_strip_model->AddObserver(tab_strip_model_observer_); |
| |
| std::vector<TabStripModelChange::Delta> deltas; |
| for (int i = 0; i < tab_strip_model->count(); ++i) { |
| deltas.push_back(TabStripModelChange::CreateInsertDelta( |
| tab_strip_model->GetWebContentsAt(i), i)); |
| } |
| |
| TabStripModelChange change(TabStripModelChange::kInserted, deltas); |
| TabStripSelectionChange selection(tab_strip_model->GetActiveWebContents(), |
| tab_strip_model->selection_model()); |
| tab_strip_model_observer_->OnTabStripModelChanged(tab_strip_model, change, |
| selection); |
| } |
| |
| void BrowserTabStripTracker::OnBrowserAdded(Browser* browser) { |
| MaybeTrackBrowser(browser); |
| } |
| |
| void BrowserTabStripTracker::OnBrowserRemoved(Browser* browser) { |
| auto it = browsers_observing_.find(browser); |
| if (it == browsers_observing_.end()) |
| return; |
| |
| browsers_observing_.erase(it); |
| browser->tab_strip_model()->RemoveObserver(tab_strip_model_observer_); |
| |
| if (browser_list_observer_) |
| browser_list_observer_->OnBrowserRemoved(browser); |
| } |
| |
| void BrowserTabStripTracker::OnBrowserSetLastActive(Browser* browser) { |
| if (browser_list_observer_) |
| browser_list_observer_->OnBrowserSetLastActive(browser); |
| } |