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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/runtime/runtime_api.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/event_router.h"
#include "chrome/browser/extensions/extension_host.h"
#include "chrome/browser/extensions/extension_process_manager.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/browser/extensions/lazy_background_task_queue.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/common/extensions/extension.h"
#include "googleurl/src/gurl.h"
namespace extensions {
namespace {
const char kOnStartupEvent[] = "runtime.onStartup";
const char kOnInstalledEvent[] = "runtime.onInstalled";
const char kOnUpdateAvailableEvent[] = "runtime.onUpdateAvailable";
const char kNoBackgroundPageError[] = "You do not have a background page.";
const char kPageLoadError[] = "Background page failed to load.";
const char kInstallReason[] = "reason";
const char kInstallReasonChromeUpdate[] = "chrome_update";
const char kInstallReasonUpdate[] = "update";
const char kInstallReasonInstall[] = "install";
const char kInstallPreviousVersion[] = "previousVersion";
static void DispatchOnStartupEventImpl(
Profile* profile,
const std::string& extension_id,
bool first_call,
ExtensionHost* host) {
// A NULL host from the LazyBackgroundTaskQueue means the page failed to
// load. Give up.
if (!host && !first_call)
return;
if (g_browser_process->IsShuttingDown() ||
!g_browser_process->profile_manager()->IsValidProfile(profile))
return;
ExtensionSystem* system = ExtensionSystem::Get(profile);
if (!system)
return;
// If this is a persistent background page, we want to wait for it to load
// (it might not be ready, since this is startup). But only enqueue once.
// If it fails to load the first time, don't bother trying again.
const Extension* extension =
system->extension_service()->extensions()->GetByID(extension_id);
if (extension && extension->has_persistent_background_page() && first_call &&
system->lazy_background_task_queue()->
ShouldEnqueueTask(profile, extension)) {
system->lazy_background_task_queue()->AddPendingTask(
profile, extension_id,
base::Bind(&DispatchOnStartupEventImpl,
profile, extension_id, false));
return;
}
scoped_ptr<base::ListValue> event_args(new ListValue());
system->event_router()->DispatchEventToExtension(
extension_id, kOnStartupEvent, event_args.Pass(), NULL, GURL());
}
} // namespace
// static
void RuntimeEventRouter::DispatchOnStartupEvent(
Profile* profile, const std::string& extension_id) {
DispatchOnStartupEventImpl(profile, extension_id, true, NULL);
}
// static
void RuntimeEventRouter::DispatchOnInstalledEvent(
Profile* profile,
const std::string& extension_id,
const Version& old_version,
bool chrome_updated) {
ExtensionSystem* system = ExtensionSystem::Get(profile);
if (!system)
return;
// Special case: normally, extensions add their own lazy event listeners.
// However, since the extension has just been installed, it hasn't had a
// chance to register for events. So we register on its behalf. If the
// extension does not actually have a listener, the event will just be
// ignored.
scoped_ptr<base::ListValue> event_args(new ListValue());
base::DictionaryValue* info = new base::DictionaryValue();
event_args->Append(info);
if (old_version.IsValid()) {
info->SetString(kInstallReason, kInstallReasonUpdate);
info->SetString(kInstallPreviousVersion, old_version.GetString());
} else if (chrome_updated) {
info->SetString(kInstallReason, kInstallReasonChromeUpdate);
} else {
info->SetString(kInstallReason, kInstallReasonInstall);
}
DCHECK(system->event_router());
system->event_router()->AddLazyEventListener(kOnInstalledEvent, extension_id);
system->event_router()->DispatchEventToExtension(
extension_id, kOnInstalledEvent, event_args.Pass(), NULL, GURL());
system->event_router()->RemoveLazyEventListener(kOnInstalledEvent,
extension_id);
}
// static
void RuntimeEventRouter::DispatchOnUpdateAvailableEvent(
Profile* profile,
const std::string& extension_id,
const DictionaryValue* manifest) {
ExtensionSystem* system = ExtensionSystem::Get(profile);
if (!system)
return;
scoped_ptr<ListValue> args(new ListValue);
args->Append(manifest->DeepCopy());
DCHECK(system->event_router());
system->event_router()->DispatchEventToExtension(
extension_id, kOnUpdateAvailableEvent, args.Pass(), NULL, GURL());
}
bool RuntimeGetBackgroundPageFunction::RunImpl() {
ExtensionHost* host =
ExtensionSystem::Get(profile())->process_manager()->
GetBackgroundHostForExtension(extension_id());
if (host) {
OnPageLoaded(host);
} else if (GetExtension()->has_lazy_background_page()) {
ExtensionSystem::Get(profile())->lazy_background_task_queue()->
AddPendingTask(
profile(), extension_id(),
base::Bind(&RuntimeGetBackgroundPageFunction::OnPageLoaded,
this));
} else {
error_ = kNoBackgroundPageError;
return false;
}
return true;
}
void RuntimeGetBackgroundPageFunction::OnPageLoaded(ExtensionHost* host) {
if (host) {
SendResponse(true);
} else {
error_ = kPageLoadError;
SendResponse(false);
}
}
bool RuntimeReloadFunction::RunImpl() {
// We can't call ReloadExtension directly, since when this method finishes
// it tries to decrease the reference count for the extension, which fails
// if the extension has already been reloaded; so instead we post a task.
MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(&ExtensionService::ReloadExtension,
profile()->GetExtensionService()->AsWeakPtr(),
extension_id()));
return true;
}
} // namespace extensions
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