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//------------------------------------------------------------------------------
// <copyright file="ControlRenderingHelper.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI {
using System;
using System.Web.Util;
internal static class ControlRenderingHelper {
private static readonly string SkipLinkContentMark = "_SkipLink";
internal static void WriteSkipLinkStart(HtmlTextWriter writer, Version renderingCompatibility, bool designMode, string skipLinkText, string spacerImageUrl, string clientID) {
if (skipLinkText.Length != 0 && !designMode) {
if (renderingCompatibility >= VersionUtil.Framework45) {
writer.AddAttribute(HtmlTextWriterAttribute.Href, '#' + clientID + SkipLinkContentMark);
writer.AddStyleAttribute(HtmlTextWriterStyle.Position, "absolute");
writer.AddStyleAttribute(HtmlTextWriterStyle.Left, "-10000px");
writer.AddStyleAttribute(HtmlTextWriterStyle.Top, "auto");
writer.AddStyleAttribute(HtmlTextWriterStyle.Width, "1px");
writer.AddStyleAttribute(HtmlTextWriterStyle.Height, "1px");
writer.AddStyleAttribute(HtmlTextWriterStyle.Overflow, "hidden");
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(skipLinkText);
writer.RenderEndTag();
}
else {
writer.AddAttribute(HtmlTextWriterAttribute.Href, '#' + clientID + SkipLinkContentMark);
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.AddAttribute(HtmlTextWriterAttribute.Alt, skipLinkText);
writer.AddAttribute(HtmlTextWriterAttribute.Src, spacerImageUrl);
writer.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth, "0px");
writer.AddAttribute(HtmlTextWriterAttribute.Width, "0");
writer.AddAttribute(HtmlTextWriterAttribute.Height, "0");
writer.RenderBeginTag(HtmlTextWriterTag.Img);
writer.RenderEndTag();
writer.RenderEndTag();
}
}
}
internal static void WriteSkipLinkEnd(HtmlTextWriter writer, bool designMode, string skipLinkText, string clientID) {
if (skipLinkText.Length != 0 && !designMode) {
writer.AddAttribute(HtmlTextWriterAttribute.Id, clientID + SkipLinkContentMark); // XHTML 1.1 needs id instead of name
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.RenderEndTag();
}
}
}
}
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