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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.
#ifndef CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_ANDROID_H_
#define CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_ANDROID_H_
#include <map>
#include <memory>
#include <set>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/scoped_multi_source_observation.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list_observer.h"
#include "chrome/browser/ui/android/tab_model/tab_model_observer.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/browser/event_router.h"
#include "url/gurl.h"
class Profile;
class TabAndroid;
class TabModel;
namespace content {
class WebContents;
}
namespace extensions {
// TabsEventRouterAndroid listens to tab events on Android and routes them to
// listeners inside extension process renderers.
//
// TODO(crbug.com/427503497): This class is a temporary solution to unblock the
// Tabs API on desktop Android. It can be deleted once TabsEventRouter works on
// desktop Android.
class TabsEventRouterAndroid : public TabModelListObserver,
public TabModelObserver {
public:
explicit TabsEventRouterAndroid(Profile* profile);
TabsEventRouterAndroid(const TabsEventRouterAndroid&) = delete;
TabsEventRouterAndroid& operator=(const TabsEventRouterAndroid&) = delete;
~TabsEventRouterAndroid() override;
// TabModelListObserver:
void OnTabModelAdded(TabModel* tab_model) override;
void OnTabModelRemoved(TabModel* tab_model) override;
// TabModelObserver:
void DidAddTab(TabAndroid* tab, TabModel::TabLaunchType type) override;
void TabRemoved(TabAndroid* tab) override;
private:
class TabEntry : public content::WebContentsObserver {
public:
TabEntry(TabsEventRouterAndroid* router, content::WebContents* contents);
~TabEntry() override;
// content::WebContentsObserver:
void DidStopLoading() override;
void TitleWasSet(content::NavigationEntry* entry) override;
void WebContentsDestroyed() override;
const raw_ptr<TabsEventRouterAndroid> router_;
GURL url_;
};
void TabCreatedAt(content::WebContents* contents, bool active);
// Internal processing of tab updated events. Intended to be called when
// there's any changed property.
void TabUpdated(TabEntry* entry,
std::set<std::string> changed_property_names);
void DispatchTabUpdatedEvent(content::WebContents* contents,
std::set<std::string> changed_property_names);
void DispatchEvent(events::HistogramValue histogram_value,
const std::string& event_name,
base::Value::List args,
EventRouter::UserGestureState user_gesture);
void RegisterForTabNotifications(content::WebContents* contents);
// Gets the TabEntry for the given `contents`. Returns TabEntry* if found,
// nullptr if not.
TabEntry* GetTabEntry(content::WebContents* contents);
raw_ptr<Profile> profile_;
base::ScopedMultiSourceObservation<TabModel, TabModelObserver>
tab_model_observations_{this};
// The map is keyed by tab id.
using TabEntryMap = std::map<int, std::unique_ptr<TabEntry>>;
TabEntryMap tab_entries_;
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_TABS_TABS_EVENT_ROUTER_ANDROID_H_
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