/// <summary>
/// 渲染元素和其子节点
/// </summary>
/// <param name="element">要渲染的元素</param>
/// <param name="context">渲染上下文</param>
private static void RenderElementAndChilds(IHtmlElement element, HtmlRenderContext context)
{
var writer = context.Writer;
var specification = element.Document.HtmlSpecification;
if (specification.IsForbiddenEndTag(element.Name))
{
var builder = new StringBuilder();
builder.Append(GenerateTagHtml(element, true));
if (element.Nodes().Any())
{
throw new FormatException(string.Format(CultureInfo.InvariantCulture, "HTML元素 {0} 不能有任何内容", element.Name));
}
writer.Write(builder);
}
else
{
writer.Write(GenerateTagHtml(element, false));
RenderChilds(element, context);
writer.Write("</{0}>", element.Name);
}
}
/// <summary>
/// 将节点呈现为 HTML
/// </summary>
/// <param name="node">要呈现的节点</param>
/// <param name="context">渲染上下文</param>
public static void Render(this IHtmlNode node, HtmlRenderContext context)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
foreach (var a in context.Adapters)
{
if (a.Render(node, context))
{
return;
}
}
var renderable = node as IHtmlRenderableNode;
if (renderable != null)
{
renderable.Render(context);
return;
}
var element = node as IHtmlElement;
if (element != null)
{
RenderElementAndChilds(element, context);
return;
}
context.Write(node.OuterHtml());
}
/// <summary>
/// 渲染所有的子节点
/// </summary>
/// <param name="container">要渲染子节点的容器</param>
/// <param name="context">渲染上下文</param>
public static void RenderChilds(this IHtmlContainer container, HtmlRenderContext context)
{
foreach (var node in container.Nodes())
{
Render(node, context);
}
}
bool IHtmlRenderAdapter.Render( IHtmlNode node, HtmlRenderContext context )
{
var element = node as IHtmlElement;
if ( element == null )
return false;
if ( !IsEligible( element ) )
return false;
Render( element, context );
return true;
}
bool IHtmlRenderAdapter.Render(IHtmlNode node, HtmlRenderContext context)
{
var element = node as IHtmlElement;
if (element == null)
{
return(false);
}
if (!IsEligible(element))
{
return(false);
}
Render(element, context);
return(true);
}
bool IHtmlRenderAdapter.Render( IHtmlNode node, HtmlRenderContext context )
{
var term = Terms.FirstOrDefault( t => t.TextNode.Equals( node ) );
if ( term != null )
{
context.Write( term.TranslatedTerm );
return true;
}
return false;
}
/// <summary> /// 派生类实现此方法提供自定义的渲染规则。 /// </summary> /// <param name="element">要渲染的元素</param> /// <param name="context">渲染上下文</param> protected abstract void Render( IHtmlElement element, HtmlRenderContext context );
/// <summary> /// 派生类实现此方法提供自定义的渲染规则。 /// </summary> /// <param name="element">要渲染的元素</param> /// <param name="context">渲染上下文</param> protected abstract void Render(IHtmlElement element, HtmlRenderContext context);
/// <summary>
/// 渲染元素和其子节点
/// </summary>
/// <param name="element">要渲染的元素</param>
/// <param name="context">渲染上下文</param>
private static void RenderElementAndChilds( IHtmlElement element, HtmlRenderContext context )
{
var writer = context.Writer;
var specification = element.Document.HtmlSpecification;
if ( specification.IsForbiddenEndTag( element.Name ) )
{
var builder = new StringBuilder();
builder.Append( GenerateTagHtml( element, true ) );
if ( element.Nodes().Any() )
throw new FormatException( string.Format( CultureInfo.InvariantCulture, "HTML元素 {0} 不能有任何内容", element.Name ) );
writer.Write( builder );
}
else
{
writer.Write( GenerateTagHtml( element, false ) );
RenderChilds( element, context );
writer.Write( "</{0}>", element.Name );
}
}
/// <summary>
/// 渲染所有的子节点
/// </summary>
/// <param name="container">要渲染子节点的容器</param>
/// <param name="context">渲染上下文</param>
public static void RenderChilds( this IHtmlContainer container, HtmlRenderContext context )
{
foreach ( var node in container.Nodes() )
{
Render( node, context );
}
}
/// <summary>
/// 将节点呈现为 HTML
/// </summary>
/// <param name="node">要呈现的节点</param>
/// <param name="context">渲染上下文</param>
public static void Render( this IHtmlNode node, HtmlRenderContext context )
{
if ( node == null )
throw new ArgumentNullException( "node" );
foreach ( var a in context.Adapters )
{
if ( a.Render( node, context ) )
return;
}
var renderable = node as IHtmlRenderableNode;
if ( renderable != null )
{
renderable.Render( context );
return;
}
var element = node as IHtmlElement;
if ( element != null )
{
RenderElementAndChilds( element, context );
return;
}
context.Write( node.OuterHtml() );
}
