/// <summary>
/// 创建一个 DOM 依赖项，当 DOM 结构发生更改时将会被标记为已过时。
/// </summary>
/// <param name="scope">要监视 DOM 修改的范围</param>
/// <param name="inclusive">是否监视自身的修改</param>
/// <param name="dependency">创建的依赖项</param>
/// <returns>是否成功</returns>
public static bool TryCreateDependency(IHtmlContainer scope, bool inclusive, out HtmlDomDependency dependency)
{
dependency = null;
if (scope == null)
{
throw new ArgumentNullException("container");
}
var notifier = scope.Document.DomModifier as INotifyDomChanged;
if (notifier == null)
{
return(false);
}
if (inclusive && !(scope is IHtmlNode))
{
return(false);
}
dependency = new HtmlDomDependency();
dependency.Notifier = notifier;
dependency.ChangedDetermine = e =>
{
if (e.Container.Equals(scope))
{
return(true);
}
if (inclusive && e.Node.Equals(scope))
{
return(true);
}
var container = e.Container as IHtmlNode;
if (container != null && container.IsDescendantOf(scope))
{
return(true);
}
return(false);
};
dependency.Notifier.HtmlDomChanged += dependency.Handler;
return(true);
}
/// <summary>
/// 创建一个 DOM 依赖项，当 DOM 结构发生更改时将会被标记为已过时。
/// </summary>
/// <param name="scope">要监视 DOM 修改的范围</param>
/// <param name="inclusive">是否监视自身的修改</param>
/// <param name="dependency">创建的依赖项</param>
/// <returns>是否成功</returns>
public static bool TryCreateDependency( IHtmlContainer scope, bool inclusive, out HtmlDomDependency dependency )
{
dependency = null;
if ( scope == null )
throw new ArgumentNullException( "container" );
var notifier = scope.Document.DomModifier as INotifyDomChanged;
if ( notifier == null )
return false;
if ( inclusive && !( scope is IHtmlNode ) )
return false;
dependency = new HtmlDomDependency();
dependency.Notifier = notifier;
dependency.ChangedDetermine = e =>
{
if ( e.Container.Equals( scope ) )
return true;
if ( inclusive && e.Node.Equals( scope ) )
return true;
var container = e.Container as IHtmlNode;
if ( container != null && container.IsDescendantOf( scope ) )
return true;
return false;
};
dependency.Notifier.HtmlDomChanged += dependency.Handler;
return true;
}
/// <summary>
/// 创建一个 DOM 依赖项，当 DOM 结构发生更改时将会被标记为已过时。
/// </summary>
/// <param name="scope">要监视 DOM 修改的范围</param>
/// <param name="dependency">创建的依赖项</param>
/// <returns>是否成功</returns>
public static bool TryCreateDependency(IHtmlContainer scope, out HtmlDomDependency dependency)
{
return(TryCreateDependency(scope, false, out dependency));
}
/// <summary>
/// 创建一个 DOM 依赖项，当 DOM 结构发生更改时将会被标记为已过时。
/// </summary>
/// <param name="scope">要监视 DOM 修改的范围</param>
/// <param name="dependency">创建的依赖项</param>
/// <returns>是否成功</returns>
public static bool TryCreateDependency( IHtmlContainer scope, out HtmlDomDependency dependency )
{
return TryCreateDependency( scope, false, out dependency );
}
