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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.
#ifndef UI_BASE_CLIPBOARD_CLIPBOARD_MONITOR_H_
#define UI_BASE_CLIPBOARD_CLIPBOARD_MONITOR_H_
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/no_destructor.h"
#include "base/observer_list.h"
#include "base/threading/thread_checker.h"
#include "build/build_config.h"
#include "ui/base/clipboard/clipboard_change_notifier.h"
namespace ui {
class ClipboardObserver;
class ClipboardChangeNotifier;
// A singleton instance to monitor and notify ClipboardObservers for clipboard
// changes.
class COMPONENT_EXPORT(UI_BASE_CLIPBOARD) ClipboardMonitor {
public:
static ClipboardMonitor* GetInstance();
ClipboardMonitor(const ClipboardMonitor&) = delete;
ClipboardMonitor& operator=(const ClipboardMonitor&) = delete;
// Adds an observer.
void AddObserver(ClipboardObserver* observer);
// Removes an observer.
void RemoveObserver(ClipboardObserver* observer);
// Sets the source which can generate clipboardchange events
// (e.g. ClipboardWin).
void SetNotifier(ClipboardChangeNotifier* notifier);
// Returns the source which can generate clipboardchange events
ClipboardChangeNotifier* GetNotifier() const { return notifier_.get(); }
// Notifies all observers for clipboard data change.
virtual void NotifyClipboardDataChanged();
#if BUILDFLAG(IS_CHROMEOS)
// Notifies all observers for clipboard data read.
virtual void NotifyClipboardDataRead();
#endif
private:
friend class base::NoDestructor<ClipboardMonitor>;
ClipboardMonitor();
virtual ~ClipboardMonitor();
base::ObserverList<ClipboardObserver>::Unchecked observers_;
raw_ptr<ClipboardChangeNotifier> notifier_ = nullptr;
THREAD_CHECKER(thread_checker_);
};
} // namespace ui
#endif // UI_BASE_CLIPBOARD_CLIPBOARD_MONITOR_H_
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