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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_DOWNLOAD_ANDROID_NEW_NAVIGATION_OBSERVER_H_
#define CHROME_BROWSER_DOWNLOAD_ANDROID_NEW_NAVIGATION_OBSERVER_H_
#include <map>
#include "base/no_destructor.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
// Singleton class for observing whether a new navigation has started in a list
// of WebContents.
class NewNavigationObserver {
public:
static NewNavigationObserver* GetInstance();
NewNavigationObserver(const NewNavigationObserver&) = delete;
NewNavigationObserver& operator=(const NewNavigationObserver&) = delete;
// Called to start a new observation for a WebContents.
void StartObserving(content::WebContents* web_contents);
// Called to stop observing a WebContents.
void StopObserving(content::WebContents* web_contents);
// Called to check whether there are any new navigations on the WebContents
// since observation.
bool HasNewNavigation(content::WebContents* web_contents);
private:
friend base::NoDestructor<NewNavigationObserver>;
NewNavigationObserver();
~NewNavigationObserver();
class DownloadNavigationObserver : public content::WebContentsObserver {
public:
explicit DownloadNavigationObserver(content::WebContents* web_contents);
~DownloadNavigationObserver() override;
DownloadNavigationObserver(const DownloadNavigationObserver&) = delete;
DownloadNavigationObserver& operator=(const DownloadNavigationObserver&) =
delete;
// content::WebContentsObserver overrides.
void DidStartNavigation(
content::NavigationHandle* navigation_handle) override;
void WebContentsDestroyed() override;
bool has_new_navigation() { return has_new_navigation_; }
private:
bool has_new_navigation_ = false;
};
std::map<content::WebContents*, std::unique_ptr<DownloadNavigationObserver>>
navigation_observers_;
};
#endif // CHROME_BROWSER_DOWNLOAD_ANDROID_NEW_NAVIGATION_OBSERVER_H_
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