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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/extensions/api/tabs/tabs_event_router_android.h"
#include "base/debug/dump_without_crashing.h"
#include "base/notimplemented.h"
#include "chrome/browser/android/tab_android.h"
#include "chrome/browser/extensions/api/tabs/tabs_constants.h"
#include "chrome/browser/extensions/extension_tab_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/android/tab_model/tab_model.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list.h"
#include "components/sessions/core/session_id.h"
#include "content/public/browser/web_contents.h"
namespace extensions {
namespace {
// Callback for the event dispatch system. Computes which tab properties have
// changed. Builds an argument list with an entry for the changed properties and
// another entry with all properties. The properties may be "scrubbed" of
// sensitive information (like the previous URL). Returns true so the event will
// be dispatched.
bool WillDispatchTabUpdatedEvent(
content::WebContents* contents,
const std::set<std::string>& changed_property_names,
bool complete,
content::BrowserContext* browser_context,
mojom::ContextType target_context,
const Extension* extension,
const base::Value::Dict* listener_filter,
std::optional<base::Value::List>& event_args_out,
mojom::EventFilteringInfoPtr& event_filtering_info_out) {
auto scrub_tab_behavior = ExtensionTabUtil::GetScrubTabBehavior(
extension, target_context, contents);
api::tabs::Tab tab_object = ExtensionTabUtil::CreateTabObject(
contents, scrub_tab_behavior, extension);
base::Value::Dict tab_value = tab_object.ToValue();
base::Value::Dict changed_properties;
for (const auto& property : changed_property_names) {
if (const base::Value* value = tab_value.Find(property)) {
changed_properties.Set(property, value->Clone());
}
}
event_args_out.emplace();
event_args_out->Append(ExtensionTabUtil::GetTabId(contents));
event_args_out->Append(std::move(changed_properties));
event_args_out->Append(std::move(tab_value));
return true;
}
} // namespace
TabsEventRouterAndroid::TabEntry::TabEntry(TabsEventRouterAndroid* router,
content::WebContents* contents)
: content::WebContentsObserver(contents),
router_(router),
url_(contents->GetURL()) {}
TabsEventRouterAndroid::TabEntry::~TabEntry() = default;
void TabsEventRouterAndroid::TabEntry::DidStopLoading() {
std::set<std::string> changed_property_names;
changed_property_names.insert(tabs_constants::kStatusKey);
if (web_contents()->GetURL() != url_) {
url_ = web_contents()->GetURL();
changed_property_names.insert(tabs_constants::kUrlKey);
}
router_->TabUpdated(this, std::move(changed_property_names));
}
void TabsEventRouterAndroid::TabEntry::TitleWasSet(
content::NavigationEntry* entry) {
std::set<std::string> changed_property_names;
changed_property_names.insert(tabs_constants::kTitleKey);
router_->TabUpdated(this, std::move(changed_property_names));
}
void TabsEventRouterAndroid::TabEntry::WebContentsDestroyed() {
int tab_id = ExtensionTabUtil::GetTabId(web_contents());
if (!SessionID::IsValidValue(tab_id)) {
return;
}
int removed_count = router_->tab_entries_.erase(tab_id);
DCHECK_GT(removed_count, 0);
}
////////////////////////////////////////////////////////////////////////////////
TabsEventRouterAndroid::TabsEventRouterAndroid(Profile* profile)
: profile_(profile) {
TabModelList::AddObserver(this);
for (TabModel* const model : TabModelList::models()) {
OnTabModelAdded(model);
}
}
TabsEventRouterAndroid::~TabsEventRouterAndroid() {
TabModelList::RemoveObserver(this);
}
void TabsEventRouterAndroid::OnTabModelAdded(TabModel* tab_model) {
if (profile_->IsSameOrParent(tab_model->GetProfile())) {
tab_model_observations_.AddObservation(tab_model);
}
}
void TabsEventRouterAndroid::OnTabModelRemoved(TabModel* tab_model) {
if (tab_model_observations_.IsObservingSource(tab_model)) {
tab_model_observations_.RemoveObservation(tab_model);
}
}
void TabsEventRouterAndroid::DidAddTab(TabAndroid* tab,
TabModel::TabLaunchType type) {
if (!tab || !tab->web_contents()) {
return;
}
int tab_id = ExtensionTabUtil::GetTabId(tab->web_contents());
if (!SessionID::IsValidValue(tab_id)) {
return;
}
// In the field, sometimes tabs are added with duplicate IDs. See
// http://crbug.com/434055707
if (tab_entries_.contains(tab_id)) {
LOG(ERROR) << "Duplicate tab ID " << tab_id << " for "
<< tab->GetURL().spec();
base::debug::DumpWithoutCrashing();
return;
}
tab_entries_.emplace(tab_id,
std::make_unique<TabEntry>(this, tab->web_contents()));
}
void TabsEventRouterAndroid::TabRemoved(TabAndroid* tab) {
if (!tab || !tab->web_contents()) {
return;
}
int tab_id = ExtensionTabUtil::GetTabId(tab->web_contents());
if (!SessionID::IsValidValue(tab_id)) {
return;
}
// NOTE: Some tests call `TabRemoved()` without calling `DidAddTab()`, so
// there may not be anything to erase.
tab_entries_.erase(tab_id);
}
void TabsEventRouterAndroid::TabUpdated(
TabEntry* entry,
std::set<std::string> changed_property_names) {
CHECK(!changed_property_names.empty());
DispatchTabUpdatedEvent(entry->web_contents(),
std::move(changed_property_names));
}
void TabsEventRouterAndroid::DispatchTabUpdatedEvent(
content::WebContents* contents,
std::set<std::string> changed_property_names) {
DCHECK(!changed_property_names.empty());
DCHECK(contents);
Profile* const profile =
Profile::FromBrowserContext(contents->GetBrowserContext());
const base::Value::List event_args;
auto event = std::make_unique<Event>(
events::TABS_ON_UPDATED, api::tabs::OnUpdated::kEventName,
// The event arguments depend on the extension's permission. They are set
// in WillDispatchTabUpdatedEvent().
base::Value::List(), profile);
event->user_gesture = EventRouter::UserGestureState::kNotEnabled;
event->will_dispatch_callback = base::BindRepeating(
&WillDispatchTabUpdatedEvent, contents, std::move(changed_property_names),
/*complete=*/true);
EventRouter::Get(profile)->BroadcastEvent(std::move(event));
}
} // namespace extensions
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