271 lines
11 KiB
C#
271 lines
11 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="XhtmlTextWriter.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI {
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.IO;
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using System.Text;
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using System.Globalization;
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public class XhtmlTextWriter : HtmlTextWriter {
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private Hashtable _commonAttributes = new Hashtable();
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// For _elementSpecificAttributes, each hashtable value is a hashtable. If an attribute name appears as a key
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// in the hashtable corresponding to an element, the attribute is passed through.
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private Hashtable _elementSpecificAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
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private Hashtable _suppressCommonAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
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private XhtmlMobileDocType _docType;
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internal override bool RenderDivAroundHiddenInputs {
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get {
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return false;
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}
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}
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public XhtmlTextWriter(TextWriter writer) : this(writer, DefaultTabString) {
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}
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public XhtmlTextWriter(TextWriter writer, string tabString) : base(writer, tabString) {
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// Common attributes are defined in the xhtml modularization spec. They are allowed by the writer unless
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// _suppressCommonAttribues["elementName"] is nonnull.
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_commonAttributes.Add("class", true);
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_commonAttributes.Add("id", true);
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_commonAttributes.Add("title", true);
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_commonAttributes.Add("xml:lang", true);
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// Note: "Dir" attribute is included in I18N if the bidirectional text module is included. Since
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// this is not the case in XHTML-MP, omit the dir attribute.
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// See http://www.wapforum.org/tech/documents/WAP-277-XHTMLMP-20011029-a.pdf and
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// http://www.w3.org/TR/xhtml-modularization/abstract_modules.html.
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// See also VSWhidbey 228858.
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// _commonAttributes.Add("dir", true);
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// Note: style attribute is added in SetDocType in case doctype is XHTML-MP or WML20. In XHTML Basic, it is disallowed.
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// Initialize dictionary lookup of attributes by element.
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// Structure Module
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// body elt has only common attributes.
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AddRecognizedAttributes("head", "xml:lang");
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_suppressCommonAttributes["head"] = true; // common attributes are disallowed for this elt.
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AddRecognizedAttributes("html", "xml:lang", "version", "xmlns");
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_suppressCommonAttributes["html"] = true; // common attributes are disallowed for this elt.
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AddRecognizedAttributes("title", "xml:lang");
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_suppressCommonAttributes["title"] = true; // common attributes are disallowed for this elt.
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// Text module
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// abbr, acronym, address have only common attributes.
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AddRecognizedAttributes("blockquote", "cite");
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AddRecognizedAttributes("br", "class", "id", "title"); // br allows only core attributes.
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_suppressCommonAttributes["br"] = true;
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// cite, code, dfn, div, em, h1-h6, kbd, p have only common attributes.
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AddRecognizedAttributes("pre", "xml:space");
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AddRecognizedAttributes("q", "cite");
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// samp, span, strong, var have only common attributes.
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// Hypertext module
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AddRecognizedAttributes("a", "accesskey", "charset", "href", "hreflang", "rel", "rev", "tabindex", "type", "title");
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// List module
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// dl, dt, dd, ol, ul, li have only common attributes.
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// Basic Forms module
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AddRecognizedAttributes("form", "action", "method", "enctype");
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AddRecognizedAttributes("input", "accesskey", "checked", "maxlength", "name", "size", "src", "tabindex", "type", "value", "title", "disabled");
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AddRecognizedAttributes("label", "accesskey");
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AddRecognizedAttributes("label", "for");
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AddRecognizedAttributes("select", "multiple", "name", "size", "tabindex", "disabled");
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AddRecognizedAttributes("option", "selected", "value");
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AddRecognizedAttributes("textarea", "accesskey", "cols", "name", "rows", "tabindex");
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// Basic Tables module
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// caption has only common attributes.
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AddRecognizedAttributes("table", "summary", "width");
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AddRecognizedAttributes("td", "abbr", "align", "axis", "colspan", "headers", "rowspan", "scope", "valign");
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AddRecognizedAttributes("th", "abbr", "align", "axis", "colspan", "headers", "rowspan", "scope", "valign");
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AddRecognizedAttributes("tr", "align", "valign");
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// Image module
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AddRecognizedAttributes("img", "alt", "height", "longdesc", "src", "width");
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// Object module
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AddRecognizedAttributes("object", "archive", "classid", "codebase", "codetype", "data", "declare", "height", "name",
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"standby", "tabindex", "type", "width");
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AddRecognizedAttributes("param", "id", "name", "type", "value", "valuetype");
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// Metainformation module
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AddRecognizedAttributes("meta", "xml:lang", "content", "http-equiv", "name", "scheme");
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_suppressCommonAttributes["meta"] = true; // common attributes are disallowed for this elt.
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// Link module
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AddRecognizedAttributes("link", "charset", "href", "hreflang", "media", "rel", "rev", "type");
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// Base module
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AddRecognizedAttributes("base", "href");
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_suppressCommonAttributes["base"] = true; // common attributes are disallowed for this elt.
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// Partial Forms module
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// fieldset has only common attributes.
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AddRecognizedAttributes("optgroup", "disabled", "label");
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// Partial Legacy module
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AddRecognizedAttributes("ol", "start");
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AddRecognizedAttributes("li", "value");
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// Partial Presentation module
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// b, big, hr, i, small have only common attributes
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// Style module
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AddRecognizedAttributes("style", "xml:lang", "media", "title", "type", "xml:space");
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_suppressCommonAttributes["style"] = true; // common attributes are disallowed for this elt.
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void AddRecognizedAttribute(string elementName, string attributeName) {
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AddRecognizedAttributes(elementName, attributeName);
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}
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private void AddRecognizedAttributes(string elementName, params string[] attributes) {
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Hashtable eltAttributes = (Hashtable) _elementSpecificAttributes[elementName];
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if (eltAttributes == null) {
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eltAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
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_elementSpecificAttributes[elementName] = eltAttributes;
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}
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foreach(string attribute in attributes) {
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eltAttributes.Add(attribute, true);
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}
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public override bool IsValidFormAttribute(string attributeName) {
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Hashtable formAttributes = (Hashtable)_elementSpecificAttributes["form"];
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return (formAttributes != null) && (formAttributes[attributeName] != null);
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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protected override bool OnAttributeRender(string name, string value, HtmlTextWriterAttribute key) {
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if (_commonAttributes[name] != null && _suppressCommonAttributes[TagName] == null) {
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return true;
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}
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// TagName is valid when OnAttributeRender is called.
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return _elementSpecificAttributes[TagName] != null && ((Hashtable)_elementSpecificAttributes[TagName])[name] != null;
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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protected override bool OnStyleAttributeRender(string name,string value, HtmlTextWriterStyle key) {
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if (_docType == XhtmlMobileDocType.XhtmlBasic) {
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return false;
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}
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if (TagName.ToLower(CultureInfo.InvariantCulture).Equals("div") && name.ToLower(CultureInfo.InvariantCulture).Equals("border-collapse")) {
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return false;
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}
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return true;
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void RemoveRecognizedAttribute(string elementName, string attributeName) {
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Hashtable eltAttributes = (Hashtable) _elementSpecificAttributes[elementName];
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if (eltAttributes == null) {
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eltAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
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_elementSpecificAttributes[elementName] = eltAttributes;
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}
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if (_commonAttributes[attributeName] == null || _suppressCommonAttributes[elementName] != null) {
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// Note: Hashtable::Remove silently continues if the key does not exist.
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eltAttributes.Remove(attributeName);
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return;
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}
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// (...else) This is an edge case. The call removes a common attribute, so we need to add each common attribute and remove the
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// except the specified one.
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_suppressCommonAttributes[elementName] = true;
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foreach(string key in _commonAttributes.Keys) {
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if (key != attributeName) {
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eltAttributes.Add(attributeName, true);
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}
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}
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void SetDocType(XhtmlMobileDocType docType) {
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_docType = docType;
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if (docType != XhtmlMobileDocType.XhtmlBasic && _commonAttributes["style"] == null) {
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_commonAttributes.Add("style", true);
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}
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public override void WriteBreak() {
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WriteFullBeginTag("br/");
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}
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protected Hashtable CommonAttributes {
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get {
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return _commonAttributes;
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}
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}
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protected Hashtable ElementSpecificAttributes {
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get {
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return _elementSpecificAttributes;
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}
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}
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protected Hashtable SuppressCommonAttributes {
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get {
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return _suppressCommonAttributes;
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}
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}
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public enum XhtmlMobileDocType {
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XhtmlBasic,
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XhtmlMobileProfile,
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Wml20
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}
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}
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