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// Copyright 2012 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_VIEWS_CONTEXT_MENU_CONTROLLER_H_
#define UI_VIEWS_CONTEXT_MENU_CONTROLLER_H_
#include "base/memory/weak_ptr.h"
#include "ui/base/mojom/menu_source_type.mojom-forward.h"
#include "ui/views/views_export.h"
namespace gfx {
class Point;
}
namespace views {
class View;
// ContextMenuController is responsible for showing the context menu for a
// View. To use a ContextMenuController invoke set_context_menu_controller on a
// View. When the appropriate user gesture occurs ShowContextMenu is invoked
// on the ContextMenuController.
//
// Setting a ContextMenuController on a view makes the view process mouse
// events.
//
// It is up to subclasses that do their own mouse processing to invoke
// the appropriate ContextMenuController method, typically by invoking super's
// implementation for mouse processing.
class VIEWS_EXPORT ContextMenuController {
public:
ContextMenuController();
ContextMenuController(const ContextMenuController&) = delete;
ContextMenuController& operator=(const ContextMenuController&) = delete;
// Invoked to show the context menu for |source|. |point| is in screen
// coordinates. This method also prevents reentrant calls.
void ShowContextMenuForView(View* source,
const gfx::Point& point,
ui::mojom::MenuSourceType source_type);
protected:
virtual ~ContextMenuController();
private:
// Subclasses should override this method.
virtual void ShowContextMenuForViewImpl(
View* source,
const gfx::Point& point,
ui::mojom::MenuSourceType source_type) = 0;
// Used as a flag to prevent a re-entrancy in ShowContextMenuForView().
// This is most relevant to Linux, where spawning the textfield context menu
// spins a nested message loop that processes input events, which may attempt
// to trigger another context menu.
bool is_opening_ = false;
base::WeakPtrFactory<ContextMenuController> weak_factory_{this};
};
} // namespace views
#endif // UI_VIEWS_CONTEXT_MENU_CONTROLLER_H_
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