'初始化'

admin

2020-06-10 a610f2ab6e543d2cb78c1ef212ac6a74ddc067d9

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// Copyright © 2018 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.
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using CefSharp.Event;
 
namespace CefSharp
{
    /// <summary>
    /// Javascript binding extension methods
    /// </summary>
    public static class JavascriptBindingExtensions
    {
        /// <summary>
        /// Make sure an object is bound in javascript. Executes against the main frame
        /// </summary>
        /// <param name="browser">browser</param>
        /// <param name="names">object names</param>
        /// <returns>List of objects that were bound</returns>
        public static Task<IList<string>> EnsureObjectBoundAsync(this IWebBrowser browser, params string[] names)
        {
            var objBoundTasks = new TaskCompletionSource<IList<string>>();
 
            EventHandler<JavascriptBindingMultipleCompleteEventArgs> handler = null;
            handler = (sender, args) =>
            {
                //Remove handler
                browser.JavascriptObjectRepository.ObjectsBoundInJavascript -= handler;
 
                var allObjectsBound = names.ToList().SequenceEqual(args.ObjectNames);
                if (allObjectsBound)
                {
                    objBoundTasks.SetResult(args.ObjectNames);
                }
                else
                {
                    objBoundTasks.SetException(new Exception("Not all objects were bound successfully, bound objects were " + string.Join(",", args.ObjectNames)));
                }
            };
 
            browser.JavascriptObjectRepository.ObjectsBoundInJavascript += handler;
 
            var bindCommand = "(function() { CefSharp.BindObjectAsync({ NotifyIfAlreadyBound: true, IgnoreCache: false }, '" + string.Join("', '", names) + "'); })();";
 
            browser.ExecuteScriptAsync(bindCommand);
 
            return objBoundTasks.Task;
        }
    }
}