using Microsoft.Win32;

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DCSY.Base

{

    public class WebBrower

    {

        /// <summary>

        /// 修改注册表信息来兼容当前程序

        ///

        /// </summary>

        public static void SetWebBrowserFeatures(int ieVersion)

        {

            // don't change the registry if running in-proc inside Visual Studio

            if (LicenseManager.UsageMode != LicenseUsageMode.Runtime)

                return;

            //获取程序及名称

            var appName = System.IO.Path.GetFileName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName);

            //得到浏览器的模式的值

            UInt32 ieMode = GeoEmulationModee(ieVersion);

            var featureControlRegKey = @"HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\";

            //设置浏览器对应用程序（appName）以什么模式（ieMode）运行

            Registry.SetValue(featureControlRegKey + "FEATURE_BROWSER_EMULATION",

                appName, ieMode, RegistryValueKind.DWord);

            // enable the features which are "On" for the full Internet Explorer browser

            //不晓得设置有什么用

            Registry.SetValue(featureControlRegKey + "FEATURE_ENABLE_CLIPCHILDREN_OPTIMIZATION",

                appName, , RegistryValueKind.DWord);

            //Registry.SetValue(featureControlRegKey + "FEATURE_AJAX_CONNECTIONEVENTS",

            //    appName, 1, RegistryValueKind.DWord);  

            //Registry.SetValue(featureControlRegKey + "FEATURE_GPU_RENDERING",

            //    appName, 1, RegistryValueKind.DWord);  

            //Registry.SetValue(featureControlRegKey + "FEATURE_WEBOC_DOCUMENT_ZOOM",

            //    appName, 1, RegistryValueKind.DWord);  

            //Registry.SetValue(featureControlRegKey + "FEATURE_NINPUT_LEGACYMODE",

            //    appName, 0, RegistryValueKind.DWord);

        }

        /// <summary>

        /// 获取浏览器的版本

        /// </summary>

        /// <returns></returns>

        static int GetBrowserVersion()

        {

            int browserVersion = ;

            using (var ieKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer",

                RegistryKeyPermissionCheck.ReadSubTree,

                System.Security.AccessControl.RegistryRights.QueryValues))

            {

                var version = ieKey.GetValue("svcVersion");

                if (null == version)

                {

                    version = ieKey.GetValue("Version");

                    if (null == version)

                        throw new ApplicationException("Microsoft Internet Explorer is required!");

                }

                int.TryParse(version.ToString().Split('.')[], out browserVersion);

            }

            //如果小于7

            if (browserVersion < )

            {

                throw new ApplicationException("不支持的浏览器版本!");

            }

            return browserVersion;

        }

        /// <summary>

        /// 通过版本得到浏览器模式的值

        /// </summary>

        /// <param name="browserVersion"></param>

        /// <returns></returns>

        static UInt32 GeoEmulationModee(int browserVersion)

        {

            UInt32 mode = ; // Internet Explorer 11. Webpages containing standards-based !DOCTYPE directives are displayed in IE11 Standards mode.

            switch (browserVersion)

            {

                case :

                    mode = ; // Webpages containing standards-based !DOCTYPE directives are displayed in IE7 Standards mode.

                    break;

                case :

                    mode = ; // Webpages containing standards-based !DOCTYPE directives are displayed in IE8 mode.

                    break;

                case :

                    mode = ; // Internet Explorer 9. Webpages containing standards-based !DOCTYPE directives are displayed in IE9 mode.

                    break;

                case :

                    mode = ; // Internet Explorer 10.

                    break;

                case :

                    mode = ; // Internet Explorer 11

                    break;

            }

            return mode;

        }

    }

}