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//------------------------------------------------------------------------------
// <copyright file="Literal.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.ComponentModel;
using System.Globalization;
using System.Web;
using System.Web.UI;
public class LiteralControlBuilder : ControlBuilder {
public override bool AllowWhitespaceLiterals() {
return false;
}
public override void AppendLiteralString(string s) {
// If it's just a white space string, delegate to the base
if (Util.IsWhiteSpaceString(s)) {
base.AppendLiteralString(s);
return;
}
// Treat the inner text as if it had been set on the 'Text' attribute
PreprocessAttribute(String.Empty /*filter*/, "text", s, false /*mainDirectiveMode*/);
}
public override void AppendSubBuilder(ControlBuilder subBuilder) {
throw new HttpException(SR.GetString(SR.Control_does_not_allow_children,
ControlType.ToString()));
}
}
// The reason we define this empty override in the WebControls namespace is
// to expose it as a control that can be used on a page (ASURT 54683)
// E.g. <asp:literal runat=server id=lit1/>
[
DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + AssemblyRef.SystemDesign),
DefaultProperty("Text"),
Designer("System.Web.UI.Design.WebControls.LiteralDesigner, " + AssemblyRef.SystemDesign),
ControlBuilderAttribute(typeof(LiteralControlBuilder)),
]
public class Literal : Control, ITextControl {
/// <devdoc>
/// [To be supplied.]
/// </devdoc>
[
DefaultValue(LiteralMode.Transform),
WebCategory("Behavior"),
WebSysDescription(SR.Literal_Mode)
]
public LiteralMode Mode {
get {
object mode = ViewState["Mode"];
return mode == null ? LiteralMode.Transform : (LiteralMode)mode;
}
set {
if ((value < LiteralMode.Transform) || (value > LiteralMode.Encode)) {
throw new ArgumentOutOfRangeException("value");
}
ViewState["Mode"] = value;
}
}
/// <devdoc>
/// [To be supplied.]
/// </devdoc>
[
Localizable(true),
Bindable(true),
WebCategory("Appearance"),
DefaultValue(""),
WebSysDescription(SR.Literal_Text),
]
public string Text {
get {
string s = (string)ViewState["Text"];
return (s != null) ? s : String.Empty;
}
set {
ViewState["Text"] = value;
}
}
/// <internalonly/>
/// <devdoc>
/// [To be supplied.]
/// </devdoc>
protected override void AddParsedSubObject(object obj) {
if (obj is LiteralControl) {
Text = ((LiteralControl)obj).Text;
}
else {
throw new HttpException(SR.GetString(SR.Cannot_Have_Children_Of_Type, "Literal", obj.GetType().Name.ToString(CultureInfo.InvariantCulture)));
}
}
/// <devdoc>
/// [To be supplied.]
/// </devdoc>
protected override ControlCollection CreateControlCollection() {
return new EmptyControlCollection(this);
}
/// <devdoc>
/// </devdoc>
[
EditorBrowsable(EditorBrowsableState.Never),
]
public override void Focus() {
throw new NotSupportedException(SR.GetString(SR.NoFocusSupport, this.GetType().Name));
}
/// <devdoc>
/// [To be supplied.]
/// </devdoc>
protected internal override void Render(HtmlTextWriter writer) {
string text = Text;
if (text.Length != 0) {
if (Mode != LiteralMode.Encode) {
writer.Write(text);
return;
}
HttpUtility.HtmlEncode(text, writer);
}
}
}
}
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