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// Copyright 2016 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/browser/update_install_gate.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_system.h"
#include "extensions/browser/extension_util.h"
#include "extensions/common/extension.h"
#include "extensions/common/manifest_handlers/background_info.h"
namespace extensions {
UpdateInstallGate::UpdateInstallGate(content::BrowserContext* browser_context)
: browser_context_(browser_context) {}
InstallGate::Action UpdateInstallGate::ShouldDelay(const Extension* extension,
bool install_immediately) {
// Allow installation when |install_immediately| is set or ExtensionSystem
// is not ready. UpdateInstallGate blocks update when the old version of
// the extension is not idle (i.e. in use). When ExtensionSystem is not
// ready, the old version is definitely idle, so the installation is allowed
// to proceeded. This essentially allows the delayed installation to happen
// during the initialization of ExtensionService.
if (install_immediately ||
!ExtensionSystem::Get(browser_context_)->is_ready()) {
return INSTALL;
}
const Extension* old = ExtensionRegistry::Get(browser_context_)
->GetInstalledExtension(extension->id());
// If there is no old extension, this is not an update, so don't delay.
if (!old) {
return INSTALL;
}
if (extensions::BackgroundInfo::HasPersistentBackgroundPage(old)) {
const char kOnUpdateAvailableEvent[] = "runtime.onUpdateAvailable";
// Delay installation if the extension listens for the onUpdateAvailable
// event.
return EventRouter::Get(browser_context_)
->ExtensionHasEventListener(extension->id(),
kOnUpdateAvailableEvent)
? DELAY
: INSTALL;
} else {
// Delay installation if the extension is not idle.
return !util::IsExtensionIdle(extension->id(), browser_context_) ? DELAY
: INSTALL;
}
}
} // namespace extensions
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