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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/extension_interaction_provider.h"
#include "base/feature_list.h"
#include "base/memory/ptr_util.h"
#include "content/public/common/content_features.h"
#include "extensions/renderer/bindings/get_per_context_data.h"
#include "extensions/renderer/get_script_context.h"
#include "extensions/renderer/script_context.h"
#include "extensions/renderer/worker_thread_util.h"
#include "third_party/blink/public/web/web_local_frame.h"
namespace extensions {
namespace {
struct ExtensionInteractionData : public base::SupportsUserData::Data {
static constexpr char kPerContextDataKey[] = "extension_interaction";
int interaction_count = 0;
int token_interaction_count = 0;
};
constexpr char ExtensionInteractionData::kPerContextDataKey[];
} // namespace
// ExtensionInteractionProvider::Token -----------------------------------------
ExtensionInteractionProvider::Token::Token(bool for_worker)
: is_for_service_worker_(for_worker) {}
ExtensionInteractionProvider::Token::~Token() = default;
// ExtensionInteractionProvider::Scope -----------------------------------------
ExtensionInteractionProvider::Scope::Scope() = default;
ExtensionInteractionProvider::Scope::~Scope() = default;
// static.
std::unique_ptr<ExtensionInteractionProvider::Scope>
ExtensionInteractionProvider::Scope::ForWorker(
v8::Local<v8::Context> v8_context) {
DCHECK(worker_thread_util::IsWorkerThread());
auto scope = base::WrapUnique(new Scope());
scope->worker_thread_interaction_ =
std::make_unique<ScopedWorkerInteraction>(v8_context, false);
return scope;
}
// static.
std::unique_ptr<ExtensionInteractionProvider::Scope>
ExtensionInteractionProvider::Scope::ForToken(
v8::Local<v8::Context> v8_context,
std::unique_ptr<InteractionProvider::Token> token) {
Token* token_impl = static_cast<Token*>(token.get());
if (!token_impl->is_for_service_worker()) {
// UserActivationV2 replaces the concept of (scoped) tokens with a
// frame-wide state, hence skips token forwarding.
return nullptr;
}
auto scope = base::WrapUnique(new Scope());
scope->worker_thread_interaction_ =
std::make_unique<ScopedWorkerInteraction>(v8_context, true);
return scope;
}
ExtensionInteractionProvider::Scope::ScopedWorkerInteraction::
ScopedWorkerInteraction(v8::Local<v8::Context> v8_context,
bool created_from_token)
: v8_context_(v8_context), created_from_token_(created_from_token) {
ExtensionInteractionData* per_context_data =
GetPerContextData<ExtensionInteractionData>(v8_context, kCreateIfMissing);
DCHECK(per_context_data);
if (created_from_token_)
per_context_data->token_interaction_count++;
else
per_context_data->interaction_count++;
}
ExtensionInteractionProvider::Scope::ScopedWorkerInteraction::
~ScopedWorkerInteraction() {
ExtensionInteractionData* per_context_data =
GetPerContextData<ExtensionInteractionData>(v8_context_,
kDontCreateIfMissing);
// If |v8_context_| was invalidated (e.g. because of JS running), bail out.
if (!per_context_data)
return;
if (created_from_token_) {
DCHECK_GT(per_context_data->token_interaction_count, 0);
per_context_data->token_interaction_count--;
} else {
DCHECK_GT(per_context_data->interaction_count, 0);
per_context_data->interaction_count--;
}
}
// ExtensionInteractionProvider ------------------------------------------------
ExtensionInteractionProvider::ExtensionInteractionProvider() = default;
ExtensionInteractionProvider::~ExtensionInteractionProvider() = default;
// static
bool ExtensionInteractionProvider::HasActiveExtensionInteraction(
v8::Local<v8::Context> v8_context) {
// Service Worker based context:
if (worker_thread_util::IsWorkerThread()) {
ExtensionInteractionData* per_context_data =
GetPerContextData<ExtensionInteractionData>(v8_context,
kDontCreateIfMissing);
if (per_context_data && (per_context_data->interaction_count > 0 ||
per_context_data->token_interaction_count > 0)) {
return true;
}
return worker_thread_util::HasWorkerContextProxyInteraction();
}
// RenderFrame based context:
ScriptContext* script_context =
GetScriptContextFromV8ContextChecked(v8_context);
if (!script_context->web_frame())
return false;
return script_context->web_frame()->HasTransientUserActivation();
}
std::unique_ptr<InteractionProvider::Token>
ExtensionInteractionProvider::GetCurrentToken(
v8::Local<v8::Context> v8_context) const {
if (worker_thread_util::IsWorkerThread()) {
ExtensionInteractionData* per_context_data =
GetPerContextData<ExtensionInteractionData>(v8_context,
kDontCreateIfMissing);
const bool has_extension_api_interaction =
per_context_data && per_context_data->interaction_count > 0;
// Only create token for Service Workers when we have an interaction taking
// place that wasn't created through another token (i.e. do not look at
// worker_data->token_interaction_count).
if (!has_extension_api_interaction &&
!worker_thread_util::HasWorkerContextProxyInteraction()) {
return nullptr;
}
return base::WrapUnique(new Token(true));
}
// Render frame based token.
return base::WrapUnique(new Token(false));
}
std::unique_ptr<InteractionProvider::Scope>
ExtensionInteractionProvider::CreateScopedInteraction(
v8::Local<v8::Context> v8_context,
std::unique_ptr<InteractionProvider::Token> token) const {
return Scope::ForToken(v8_context, std::move(token));
}
bool ExtensionInteractionProvider::HasActiveInteraction(
v8::Local<v8::Context> v8_context) const {
return ExtensionInteractionProvider::HasActiveExtensionInteraction(
v8_context);
}
} // namespace extensions
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