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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/win/installer_downloader/installer_downloader_active_browser_window_tracker.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_window.h"
namespace installer_downloader {
InstallerDownloaderActiveBrowserWindowTracker::
InstallerDownloaderActiveBrowserWindowTracker() {
BrowserList::GetInstance()->AddObserver(this);
MaybeUpdateLastActiveWindow(BrowserList::GetInstance()->GetLastActive());
}
InstallerDownloaderActiveBrowserWindowTracker::
~InstallerDownloaderActiveBrowserWindowTracker() {
BrowserList::GetInstance()->RemoveObserver(this);
}
base::CallbackListSubscription InstallerDownloaderActiveBrowserWindowTracker::
RegisterActiveWindowChangedCallback(WindowChangedCallback callback) {
auto subscription = active_window_change_callbacks_.Add(callback);
callback.Run(last_active_window_);
return subscription;
}
base::CallbackListSubscription
InstallerDownloaderActiveBrowserWindowTracker::RegisterRemovedWindowCallback(
WindowChangedCallback callback) {
return window_remove_callbacks_.Add(callback);
}
void InstallerDownloaderActiveBrowserWindowTracker::OnBrowserSetLastActive(
Browser* browser) {
MaybeUpdateLastActiveWindow(browser);
}
void InstallerDownloaderActiveBrowserWindowTracker::OnBrowserRemoved(
Browser* browser) {
window_remove_callbacks_.Notify(
static_cast<BrowserWindowInterface*>(browser));
if (!last_active_window_ ||
static_cast<BrowserWindowInterface*>(browser) != last_active_window_) {
return;
}
MaybeUpdateLastActiveWindow(BrowserList::GetInstance()->GetLastActive());
}
void InstallerDownloaderActiveBrowserWindowTracker::MaybeUpdateLastActiveWindow(
Browser* browser) {
BrowserWindowInterface* last_active_window =
browser && browser->is_type_normal()
? static_cast<BrowserWindowInterface*>(browser)
: nullptr;
if (last_active_window == last_active_window_) {
return;
}
last_active_window_ = last_active_window;
active_window_change_callbacks_.Notify(last_active_window_);
}
} // namespace installer_downloader
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