GeckoFx (2)向已加载的页面中注入 css 和 js

来源：互联网发布：mac查看硬盘使用情况编辑：程序博客网时间：2024/06/05 08:13

向已加载的页面中注入js、css，在页面加载完后执行自定义的脚本,点击页面元素展示修改元素的边框颜色。
使用 browser_Load 事件在页面加载完成时注入脚本。

使用 DomClick 事件，修改触发元素的样式。

初始化组件：public void InitFrm(){this.WindowState = FormWindowState.Maximized;Xpcom.Initialize(xulrunnerPath);browser = new Gecko.GeckoWebBrowser();            browser.Parent = this;browser.Dock = DockStyle.Fill;browser.Navigate("http://blog.csdn.net/xxj_jing");panelBottom.Height = 300;browser.Load += browser_Load;browser.DomClick += browser_DomClick;}private bool _load = false;/// <summary>/// 加载文档/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void browser_Load(object sender, DomEventArgs e){if (!_load){InjectCss(browser.Document);InjectJs(browser.Document);}if (!_load) _load = true;}/// <summary>/// 注入样式/// </summary>public void InjectCss(GeckoDomDocument doc){var css = doc.CreateHtmlElement("style");css.InnerHtml = @".firefinder-match-red {outline: 2px dashed #f00 !important;}.firefinder-match-blue {outline: 2px dashed #00f !important;}";browser.Document.Head.AppendChild(css);}/// <summary>/// 注入脚本/// </summary>public void InjectJs(GeckoDomDocument doc){var js = doc.CreateHtmlElement("script");js.InnerHtml = "alert(1);";browser.Document.Head.AppendChild(js);}/// <summary>/// 文档单击事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void browser_DomClick(object sender, DomMouseEventArgs e){var ele = e.CurrentTarget.CastToGeckoElement();ele = e.Target.CastToGeckoElement();AddClass("firefinder-match-red", ele);}/// <summary>/// 添加样式/// </summary>public void AddClass(string className,params GeckoElement[] element){if (element != null && element.Length > 0){element.All(x =>{if (x == null)return true;var cls = x.GetAttribute("class");cls += " " + className;x.SetAttribute("class", cls);return true;});}}/// <summary>/// 移除样式/// </summary>public void RemoveClass(string className, params GeckoElement[] element){if (element != null && element.Length>0){element.All(x =>{if (x == null)return true;var cls = x.GetAttribute("class");if (!string.IsNullOrWhiteSpace(cls)){cls = cls.Replace(className, "").Trim();x.SetAttribute("class", cls);}return true;});}}

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