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// Copyright © 2014 The CefSharp Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
namespace CefSharp
{
/// <summary>
/// Implement this interface to handle context menu events.
/// </summary>
public interface IContextMenuHandler
{
/// <summary>
/// Called before a context menu is displayed. The model can be cleared to show no context menu or
/// modified to show a custom menu.
/// </summary>
/// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
/// <param name="browser">the browser object</param>
/// <param name="frame">The frame the request is coming from</param>
/// <param name="parameters">provides information about the context menu state</param>
/// <param name="model">initially contains the default context menu</param>
void OnBeforeContextMenu(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IContextMenuParams parameters,
IMenuModel model);
/// <summary>
/// Called to execute a command selected from the context menu. See
/// cef_menu_id_t for the command ids that have default implementations. All
/// user-defined command ids should be between MENU_ID_USER_FIRST and
/// MENU_ID_USER_LAST.
/// </summary>
/// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
/// <param name="browser">the browser object</param>
/// <param name="frame">The frame the request is coming from</param>
/// <param name="parameters">will have the same values as what was passed to</param>
/// <param name="commandId">menu command id</param>
/// <param name="eventFlags">event flags</param>
/// <returns>Return true if the command was handled or false for the default implementation.</returns>
bool OnContextMenuCommand(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IContextMenuParams parameters,
CefMenuCommand commandId, CefEventFlags eventFlags);
/// <summary>
/// Called when the context menu is dismissed irregardless of whether the menu
/// was empty or a command was selected.
/// </summary>
/// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
/// <param name="browser">the browser object</param>
/// <param name="frame">The frame the request is coming from</param>
void OnContextMenuDismissed(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame);
/// <summary>
/// Called to allow custom display of the context menu.
/// For custom display return true and execute callback either synchronously or asynchronously with the selected command Id.
/// For default display return false. Do not keep references to parameters or model outside of this callback.
/// </summary>
/// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
/// <param name="browser">the browser object</param>
/// <param name="frame">The frame the request is coming from</param>
/// <param name="parameters">provides information about the context menu state</param>
/// <param name="model">contains the context menu model resulting from OnBeforeContextMenu</param>
/// <param name="callback">the callback to execute for custom display</param>
/// <returns>For custom display return true and execute callback either synchronously or asynchronously with the selected command ID.</returns>
bool RunContextMenu(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IContextMenuParams parameters, IMenuModel model, IRunContextMenuCallback callback);
}
}