* CEF JS调用C#组装类
*
* 使用方法（CefGlue为例）：
* public class BrowserRenderProcessHandler : CefRenderProcessHandler
{
* //自定义Handler
private TestBrowserHandler _testHandler = null;
*
* protected override void OnWebKitInitialized()
* {
* _testHandler = new TestBrowserHandler();
* CefRuntime.RegisterExtension(_testHandler.GetType().Name, _testHandler.Javascript.Create(), _testHandler);
* }
* ｝
*
* /// <summary>
/// 测试Handler
/// </summary>
public class TestBrowserHandler : CefV8Handler
{
public GenerateJavascriptFull Javascript = null;
*
* public TestBrowserHandler()
{
Javascript = new GenerateJavascriptFull("plugins", "test");
* // getHello的参数数量，可进一步封装。表示接受一个参数
Javascript.AddMethod("gethello", "arg0");
* // getHello的参数数量，可进一步封装。表示接受二个参数
Javascript.AddMethod("sethello", "arg0","arg1");
* //表示无参
* Javascript.AddMethod("sethello");
Javascript.AddGetProperty("hello", "gethello");
Javascript.AddSetProperty("hello", "sethello", "arg0");
Javascript.AddMethod("start", "arg0");
Javascript.AddMethod("stop");
*
* //这里表示浏览器JS增加了: window.plugins.test 对象
* // window.plugins.test.gethello()
* // window.plugins.test.sethello("123")
* //断点在 Execute(**)中
}
*
* protected override bool Execute(string name, CefV8Value obj, CefV8Value[] arguments, out CefV8Value returnValue, out string exception)
{
try
{
returnValue = CefV8Value.CreateNull();
switch (name)
{
case "gethello":
//returnValue = CefV8Value.CreateString(GetHello());
if (arguments.Length == 1 && arguments[0].IsFunction)
{
CefV8Value[] args = new CefV8Value[1];
args[0] = CefV8Value.CreateString(GetHello());
returnValue = arguments[0].ExecuteFunction(null, args);
}
break;
case "sethello":
returnValue = CefV8Value.CreateBool(SetHello(arguments[0].GetStringValue()));
break;
case "start":
if (arguments.Length == 1 && arguments[0].IsFunction)
{
CefV8Context context = CefV8Context.GetCurrentContext();
//这里定义异步调用方式
new Thread(new ThreadStart(delegate()
{
while (isStart)
{
System.Threading.Thread.Sleep(1000);
string timer = DateTime.Now.ToString();
* //TestTimerTask继承CefTask
CefRuntime.PostTask(CefThreadId.Renderer, new TestTimerTask(context as CefV8Context, arguments[0], new object[] { timer }));
}
})).Start();
returnValue = CefV8Value.CreateBool(true);
}
break;
case "stop":
isStart = false;
returnValue = CefV8Value.CreateBool(true);
break;
}
exception = null;
return true;
}
catch (Exception e)
{
returnValue = null;
exception = e.Message;
return false;
}
}
* }
*
*
*
*
*
*/
using System;
using System.Collections.Generic;
using System.Text;
namespace G.DeskCommon
{
/// <summary>
/// 组装JS
/// </summary>
public class GenerateJavascriptFull
{
string _extensionName = string.Empty;
string _functionName = string.Empty;
Dictionary<string, string[]> _methodName = new Dictionary<string, string[]>();
//
Dictionary<string, string> _getterPropertyName = new Dictionary<string, string>();
// 保存setter 名称 和参数。 与 _setterPropertyArgs 成对出现。
Dictionary<string, string> _setterPropertyName = new Dictionary<string, string>();
Dictionary<string, string[]> _setterPropertyArgs = new Dictionary<string, string[]>();
//自定义javascript代码
List<string> _customJavascript = new List<string>();
/// <summary>
///
/// </summary>
/// <param name="extensionName">
/// 插件方法作用域
/// e.g: window.plugin.test
/// 其中 plugin 为作用域. 如不设置，添加的js方法在window下.
/// </param>
/// <param name="functionName">
///
/// </param>
public GenerateJavascriptFull(string extensionName, string functionName)
{
_extensionName = extensionName;
_functionName = functionName;
}
/// <summary>
/// 增加方法
/// </summary>
/// <param name="methodName">方法名称</param>
/// <param name="args">参数名：arg0,arg1,...arg20 (固定写死)</param>
public void AddMethod(string methodName, params string[] args)
{
//检测是否存在改方法
if (_methodName.ContainsKey(methodName))
return;
_methodName.Add(methodName, args);
}
/// <summary>
/// 增加Getter属性
/// </summary>
/// <param name="propertyName">属性名称</param>
/// <param name="executeName">执行名称,CEF handler中execute的Name参数同名</param>
public void AddGetProperty(string propertyName, string executeName)
{
if (_getterPropertyName.ContainsKey(propertyName))
return;
_getterPropertyName.Add(propertyName, executeName);
}
/// <summary>
/// 增加Setter属性
/// </summary>
/// <param name="propertyName">属性名称</param>
/// <param name="executeName">执行名称,CEF handler中execute的Name参数同名</param>
/// <param name="args">参数名：arg0,arg1,...arg20 (固定写死)</param>
public void AddSetProperty(string propertyName, string executeName, params string[] args)
{
if (_setterPropertyName.ContainsKey(propertyName) || _setterPropertyArgs.ContainsKey(propertyName))
return;
_setterPropertyName.Add(propertyName, executeName);
_setterPropertyArgs.Add(propertyName, args);
}
/// <summary>
/// 增加自定义的javascript代码。
/// </summary>
/// <param name="javascriptCode">注意：functionName一定要大写。
/// 例如： TEST.__defineSetter__('hello', function(b) {
/// native function sethello();sethello(b);});</param>
public void AddCustomJavascript(string javascriptCode)
{
_customJavascript.Add(javascriptCode);
}
/// <summary>
/// 组装本地JS的一个过程
/// </summary>
/// <returns>返回CEF识别的javascript</returns>
public string Create()
{
//System.Threading.Thread.Sleep(3000);
if (string.IsNullOrEmpty(_functionName)) throw new Exception("JavascriptFull函数名不能为空！");
StringBuilder sb = new StringBuilder();
//头部
if (!string.IsNullOrEmpty(_extensionName))
{
sb.Append(string.Format("if (!{0}) var {0} = {{ }}; ", _extensionName));
}
if (!string.IsNullOrEmpty(_functionName))
{
sb.Append(string.Format("var {0} = function () {{ }}; ", _functionName.ToUpper()));
if (!string.IsNullOrEmpty(_extensionName))
sb.Append(string.Format("if (!{0}.{1}) {0}.{1} = {2};", _extensionName, _functionName, _functionName.ToUpper()));
else
sb.Append(string.Format("if (!{0}) var {0} = {1};", _functionName, _functionName.ToUpper()));
}
//开始
sb.Append("(function () {");
//方法
foreach (KeyValuePair<string, string[]> item in _methodName)
{
sb.Append(string.Format("{0}.{1} = function ({2}) {{", _functionName.ToUpper(), item.Key, string.Join(",", item.Value)));
sb.Append(string.Format("native function {0}({1}); return {0}({1});", item.Key, string.Join(",", item.Value)));
sb.Append("};");
}
//GET属性
foreach (KeyValuePair<string, string> item in _getterPropertyName)
{
sb.Append(string.Format("{0}.__defineGetter__('{1}', function () {{", _functionName.ToUpper(), item.Key));
sb.Append(string.Format("native function {0}(); return {0}();", item.Value));
sb.Append("});");
}
//SET属性
if (_setterPropertyArgs.Count == _setterPropertyName.Count)
{
foreach (KeyValuePair<string, string> item in _setterPropertyName)
{
sb.Append(string.Format("{0}.__defineSetter__('{1}', function ({2}) {{", _functionName.ToUpper(), item.Key, string.Join(",", _setterPropertyArgs[item.Key])));
sb.Append(string.Format("native function {0}({1}); return {0}({1});", item.Value, string.Join(",", _setterPropertyArgs[item.Key])));
sb.Append("});");
}
}
//自定义javascript
for (int i = 0; i < _customJavascript.Count; i++)
{
sb.Append(_customJavascript[i]);
}
//结尾
sb.Append("})();");
return sb.ToString();
}
}
}
来源：http://www.cnblogs.com/hnsongbiao/p/4209155.html