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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_WEB_APPLICATIONS_LOCKS_SHARED_WEB_CONTENTS_LOCK_H_
#define CHROME_BROWSER_WEB_APPLICATIONS_LOCKS_SHARED_WEB_CONTENTS_LOCK_H_
#include "base/memory/weak_ptr.h"
#include "chrome/browser/web_applications/locks/lock.h"
#include "chrome/browser/web_applications/locks/with_shared_web_contents_resources.h"
namespace content {
class WebContents;
} // namespace content
namespace web_app {
class WebAppLockManager;
// This locks the background shared web contents that is used by the
// WebAppProvider system to do operations in the background that require a web
// contents, like install web apps and fetch data.
//
// Locks can be acquired by using the `WebAppLockManager`.
//
// Note: Accessing a lock before it is granted or after the WebAppProvider
// system has shutdown (or the profile has shut down) will CHECK-fail.
class SharedWebContentsLockDescription : public LockDescription {
public:
SharedWebContentsLockDescription();
SharedWebContentsLockDescription(SharedWebContentsLockDescription&&);
~SharedWebContentsLockDescription();
};
// Holding this locks means you have exclusive access to a background web
// contents that is shared by the WebAppProvider system.
// The web contents will be prepared for use via
// WebAppUrlLoader::PrepareForLoad() prior to being granted access.
//
// See `WebAppLockManager` for how to use locks. Destruction of this class will
// release the lock or cancel the lock request if it is not acquired yet.
//
// Note: Accessing a lock will CHECK-fail if the WebAppProvider system has
// shutdown (or the profile has shut down).
class SharedWebContentsLock : public Lock,
public WithSharedWebContentsResources {
public:
using LockDescription = SharedWebContentsLockDescription;
SharedWebContentsLock();
~SharedWebContentsLock();
base::WeakPtr<SharedWebContentsLock> AsWeakPtr() {
return weak_factory_.GetWeakPtr();
}
private:
friend class WebAppLockManager;
void GrantLock(WebAppLockManager& lock_manager,
content::WebContents& shared_web_contents);
base::WeakPtrFactory<SharedWebContentsLock> weak_factory_{this};
};
} // namespace web_app
#endif // CHROME_BROWSER_WEB_APPLICATIONS_LOCKS_SHARED_WEB_CONTENTS_LOCK_H_
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