// Copyright 2014 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_UI_EXTENSIONS_EXTENSION_ACTION_DELEGATE_H_
#define CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_ACTION_DELEGATE_H_

#include <memory>

#include "chrome/browser/ui/extensions/extension_popup_types.h"
#include "ui/gfx/native_ui_types.h"

class ExtensionActionViewModel;

namespace extensions {
class ExtensionViewHost;
}  // namespace extensions

// Implements platform-specific extension action UI logic, such as showing the
// action's popup and the context menu.
//
// An instance of this interface should be passed to the constructor of
// `ExtensionActionViewModel`. It takes the ownership of the instance, and calls
// `AttachToModel` in the constructor, and `DetachFromModel` in the destructor.
//
// Platform-agnostic extension action UI logic must go into
// `ExtensionActionViewModel` instead.
class ExtensionActionDelegate {
 public:
  virtual ~ExtensionActionDelegate() = default;

  // Attaches the delegate to an ExtensionActionViewModel. It is called
  // by the model on its constructor.
  virtual void AttachToModel(ExtensionActionViewModel* model) = 0;

  // Detaches the delegate from an ExtensionActionViewModel. It is called
  // by the model on its destructor.
  virtual void DetachFromModel() = 0;

  // The following are forwarded from ToolbarActionViewModel. See that
  // class for the definitions.
  virtual void RegisterCommand() = 0;
  virtual void UnregisterCommand() = 0;

  // Returns whether there is currently a popup visible.
  virtual bool IsShowingPopup() const = 0;

  // Hides the current popup, if one is visible.
  virtual void HidePopup() = 0;

  // Returns the native view for the popup, if one is active.
  virtual gfx::NativeView GetPopupNativeViewForTesting() = 0;

  // Begins the process of showing the popup for the extension action on the
  // current web contents. |by_user| is true if popup is being triggered by a
  // user action.
  // The popup may not be shown synchronously if the extension is hidden and
  // first needs to slide itself out.
  virtual void TriggerPopup(std::unique_ptr<extensions::ExtensionViewHost> host,
                            PopupShowAction show_action,
                            bool by_user,
                            ShowPopupCallback callback) = 0;

  // Shows the context menu for the action as a fallback for performing another
  // action.
  virtual void ShowContextMenuAsFallback() = 0;

  // Closes the extensions menu if it was open.
  virtual void CloseExtensionsMenuIfOpen() = 0;
};

#endif  // CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_ACTION_DELEGATE_H_