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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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/declarative/declarative_api.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/task_runner_util.h"
#include "base/values.h"
#include "chrome/browser/extensions/api/declarative/rules_registry_service.h"
#include "chrome/browser/extensions/extension_system_factory.h"
#include "chrome/browser/guestview/webview/webview_guest.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/events.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "extensions/common/extension_api.h"
using extensions::api::events::Rule;
namespace AddRules = extensions::api::events::Event::AddRules;
namespace GetRules = extensions::api::events::Event::GetRules;
namespace RemoveRules = extensions::api::events::Event::RemoveRules;
namespace extensions {
namespace {
const char kWebRequest[] = "declarativeWebRequest.";
const char kWebView[] = "webview.";
const char kWebViewExpectedError[] = "Webview event with Webview ID expected.";
bool IsWebViewEvent(const std::string& event_name) {
// Sample event names:
// webview.onRequest.
// webview.OnMessage.
return event_name.compare(0, strlen(kWebView), kWebView) == 0;
}
std::string GetWebRequestEventName(const std::string& event_name) {
std::string web_request_event_name(event_name);
if (IsWebViewEvent(web_request_event_name))
web_request_event_name.replace(0, strlen(kWebView), kWebRequest);
return web_request_event_name;
}
} // namespace
RulesFunction::RulesFunction()
: rules_registry_(NULL) {
}
RulesFunction::~RulesFunction() {}
bool RulesFunction::HasPermission() {
std::string event_name;
EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &event_name));
if (IsWebViewEvent(event_name) &&
extension_->HasAPIPermission(extensions::APIPermission::kWebView))
return true;
Feature::Availability availability =
ExtensionAPI::GetSharedInstance()->IsAvailable(
event_name, extension_, Feature::BLESSED_EXTENSION_CONTEXT,
source_url());
return availability.is_available();
}
bool RulesFunction::RunImpl() {
std::string event_name;
EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &event_name));
int webview_instance_id = 0;
EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(1, &webview_instance_id));
int embedder_process_id = render_view_host()->GetProcess()->GetID();
bool has_webview = webview_instance_id != 0;
if (has_webview != IsWebViewEvent(event_name))
EXTENSION_FUNCTION_ERROR(kWebViewExpectedError);
event_name = GetWebRequestEventName(event_name);
// If we are not operating on a particular <webview>, then the key is (0, 0).
RulesRegistryService::WebViewKey key(
webview_instance_id ? embedder_process_id : 0, webview_instance_id);
RulesRegistryService* rules_registry_service =
RulesRegistryService::Get(GetProfile());
rules_registry_ = rules_registry_service->GetRulesRegistry(key, event_name);
// Raw access to this function is not available to extensions, therefore
// there should never be a request for a nonexisting rules registry.
EXTENSION_FUNCTION_VALIDATE(rules_registry_.get());
if (content::BrowserThread::CurrentlyOn(rules_registry_->owner_thread())) {
bool success = RunImplOnCorrectThread();
SendResponse(success);
} else {
scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
content::BrowserThread::GetMessageLoopProxyForThread(
rules_registry_->owner_thread());
base::PostTaskAndReplyWithResult(
message_loop_proxy.get(),
FROM_HERE,
base::Bind(&RulesFunction::RunImplOnCorrectThread, this),
base::Bind(&RulesFunction::SendResponse, this));
}
return true;
}
bool EventsEventAddRulesFunction::RunImplOnCorrectThread() {
scoped_ptr<AddRules::Params> params(AddRules::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params.get());
error_ = rules_registry_->AddRules(extension_id(), params->rules);
if (error_.empty())
results_ = AddRules::Results::Create(params->rules);
return error_.empty();
}
bool EventsEventRemoveRulesFunction::RunImplOnCorrectThread() {
scoped_ptr<RemoveRules::Params> params(RemoveRules::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params.get());
if (params->rule_identifiers.get()) {
error_ = rules_registry_->RemoveRules(extension_id(),
*params->rule_identifiers);
} else {
error_ = rules_registry_->RemoveAllRules(extension_id());
}
return error_.empty();
}
bool EventsEventGetRulesFunction::RunImplOnCorrectThread() {
scoped_ptr<GetRules::Params> params(GetRules::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params.get());
std::vector<linked_ptr<Rule> > rules;
if (params->rule_identifiers.get()) {
error_ = rules_registry_->GetRules(extension_id(),
*params->rule_identifiers,
&rules);
} else {
error_ = rules_registry_->GetAllRules(extension_id(), &rules);
}
if (error_.empty())
results_ = GetRules::Results::Create(rules);
return error_.empty();
}
} // namespace extensions
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