public void TestArgumentExceptions () { Assert.Throws<ArgumentNullException> (() => new HtmlWriter (null, Encoding.UTF8)); Assert.Throws<ArgumentNullException> (() => new HtmlWriter (new MemoryStream (), null)); Assert.Throws<ArgumentNullException> (() => new HtmlWriter (null)); using (var html = new HtmlWriter (new StringWriter ())) { Assert.Throws<ArgumentNullException> (() => html.WriteAttribute (null)); Assert.Throws<ArgumentNullException> (() => html.WriteAttribute (null, string.Empty)); Assert.Throws<ArgumentNullException> (() => html.WriteAttribute ("name", null)); Assert.Throws<ArgumentException> (() => html.WriteAttribute (string.Empty, null)); Assert.Throws<ArgumentException> (() => html.WriteAttribute ("a b c", null)); Assert.Throws<ArgumentNullException> (() => html.WriteAttribute (null, new char[1], 0, 1)); Assert.Throws<ArgumentNullException> (() => html.WriteAttribute ("name", null, 0, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttribute ("name", new char[0], -1, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttribute ("name", new char[0], 0, 1)); Assert.Throws<ArgumentException> (() => html.WriteAttribute (HtmlAttributeId.Unknown, new char[1], 0, 1)); Assert.Throws<ArgumentNullException> (() => html.WriteAttribute (HtmlAttributeId.Alt, null, 0, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttribute (HtmlAttributeId.Alt, new char[0], -1, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttribute (HtmlAttributeId.Alt, new char[0], 0, 1)); Assert.Throws<ArgumentException> (() => html.WriteAttributeName (HtmlAttributeId.Unknown)); Assert.Throws<ArgumentNullException> (() => html.WriteAttributeName (null)); Assert.Throws<ArgumentNullException> (() => html.WriteAttributeValue (null)); Assert.Throws<ArgumentNullException> (() => html.WriteAttributeValue (null, 0, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttributeValue (new char[0], -1, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteAttributeValue (new char[0], 0, 1)); Assert.Throws<ArgumentException> (() => html.WriteEmptyElementTag (HtmlTagId.Unknown)); Assert.Throws<ArgumentNullException> (() => html.WriteEmptyElementTag (null)); Assert.Throws<ArgumentException> (() => html.WriteEmptyElementTag (string.Empty)); Assert.Throws<ArgumentException> (() => html.WriteEmptyElementTag ("a b c")); Assert.Throws<ArgumentException> (() => html.WriteEndTag (HtmlTagId.Unknown)); Assert.Throws<ArgumentNullException> (() => html.WriteEndTag (null)); Assert.Throws<ArgumentException> (() => html.WriteEndTag (string.Empty)); Assert.Throws<ArgumentException> (() => html.WriteEndTag ("a b c")); Assert.Throws<ArgumentNullException> (() => html.WriteMarkupText (null)); Assert.Throws<ArgumentNullException> (() => html.WriteMarkupText (null, 0, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteMarkupText (new char[0], -1, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteMarkupText (new char[0], 0, 1)); Assert.Throws<ArgumentException> (() => html.WriteStartTag (HtmlTagId.Unknown)); Assert.Throws<ArgumentNullException> (() => html.WriteStartTag (null)); Assert.Throws<ArgumentException> (() => html.WriteStartTag (string.Empty)); Assert.Throws<ArgumentException> (() => html.WriteStartTag ("a b c")); Assert.Throws<ArgumentNullException> (() => html.WriteText (null)); Assert.Throws<ArgumentNullException> (() => html.WriteText (null, 0, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteText (new char[0], -1, 0)); Assert.Throws<ArgumentOutOfRangeException> (() => html.WriteText (new char[0], 0, 1)); Assert.Throws<ArgumentNullException> (() => html.WriteToken (null)); } }
/// <summary> /// Write the HTML tag. /// </summary> /// <remarks> /// Writes the HTML tag to the given <see cref="HtmlWriter"/>. /// </remarks> /// <example> /// <code language="c#" source="Examples\MimeVisitorExamples.cs" region="HtmlPreviewVisitor" /> /// </example> /// <param name="htmlWriter">The HTML writer.</param> /// <param name="writeAttributes"><c>true</c> if the <see cref="Attributes"/> should also be written; otherwise, <c>false</c>.</param> /// <exception cref="System.ArgumentNullException"> /// <paramref name="htmlWriter"/> is <c>null</c>. /// </exception> public void WriteTag(HtmlWriter htmlWriter, bool writeAttributes) { if (htmlWriter == null) { throw new ArgumentNullException(nameof(htmlWriter)); } if (IsEndTag) { htmlWriter.WriteEndTag(TagName); return; } if (IsEmptyElementTag) { htmlWriter.WriteEmptyElementTag(TagName); } else { htmlWriter.WriteStartTag(TagName); } if (writeAttributes) { for (int i = 0; i < Attributes.Count; i++) { htmlWriter.WriteAttribute(Attributes[i]); } } }
void HtmlTagCallback (HtmlTagContext ctx, HtmlWriter htmlWriter) { if (ctx.TagId == HtmlTagId.Body && !ctx.IsEmptyElementTag) { if (ctx.IsEndTag) { // end our opening <blockquote> htmlWriter.WriteEndTag (HtmlTagId.BlockQuote); // pass the </body> tag through to the output ctx.WriteTag (htmlWriter, true); } else { // pass the <body> tag through to the output ctx.WriteTag (htmlWriter, true); // prepend the HTML reply with "On {DATE}, {SENDER} wrote:" htmlWriter.WriteStartTag (HtmlTagId.P); htmlWriter.WriteText (GetOnDateSenderWrote (message)); htmlWriter.WriteEndTag (HtmlTagId.P); // Wrap the original content in a <blockquote> htmlWriter.WriteStartTag (HtmlTagId.BlockQuote); htmlWriter.WriteAttribute (HtmlAttributeId.Style, "border-left: 1px #ccc solid; margin: 0 0 0 .8ex; padding-left: 1ex;"); ctx.InvokeCallbackForEndTag = true; } } else { // pass the tag through to the output ctx.WriteTag (htmlWriter, true); } }
/// <summary> /// Write the HTML tag. /// </summary> /// <remarks> /// Writes the HTML tag to the given <see cref="HtmlWriter"/>. /// </remarks> /// <example> /// <code language="c#" source="Examples\MimeVisitorExamples.cs" region="HtmlPreviewVisitor" /> /// </example> /// <param name="htmlWriter">The HTML writer.</param> /// <param name="writeAttributes"><c>true</c> if the <see cref="Attributes"/> should also be written; otherwise, <c>false</c>.</param> /// <exception cref="System.ArgumentNullException"> /// <paramref name="htmlWriter"/> is <c>null</c>. /// </exception> public void WriteTag (HtmlWriter htmlWriter, bool writeAttributes) { if (htmlWriter == null) throw new ArgumentNullException ("htmlWriter"); if (IsEndTag) { htmlWriter.WriteEndTag (TagName); return; } if (IsEmptyElementTag) htmlWriter.WriteEmptyElementTag (TagName); else htmlWriter.WriteStartTag (TagName); if (writeAttributes) { for (int i = 0; i < Attributes.Count; i++) htmlWriter.WriteAttribute (Attributes[i]); } }
public void TestHtmlWriter () { const string expected = "<html ltr=\"true\"><head/><body><p class=\"paragraph\">" + "special characters in this text should get encoded: <>'&\n" + "special characters should not get encoded: <>" + "</p></body></html>"; var actual = new StringBuilder (); using (var html = new HtmlWriter (new StringWriter (actual))) { Assert.AreEqual (HtmlWriterState.Default, html.WriterState); // make sure we can't start by writing an attribute since we are in the wrong state Assert.Throws<InvalidOperationException> (() => html.WriteAttribute (new HtmlAttribute (HtmlAttributeId.Action, "invalid state"))); Assert.Throws<InvalidOperationException> (() => html.WriteAttribute (HtmlAttributeId.Action, "invalid state")); Assert.Throws<InvalidOperationException> (() => html.WriteAttribute ("action", "invalid state")); // write a tag html.WriteStartTag (HtmlTagId.Html); Assert.AreEqual (HtmlWriterState.Tag, html.WriterState); // *now* we should be able to write an attribute html.WriteAttribute (new HtmlAttribute ("ltr", "true")); // write en empty element tag, this should change the state to Default html.WriteEmptyElementTag (HtmlTagId.Head); Assert.AreEqual (HtmlWriterState.Tag, html.WriterState); html.WriteStartTag ("body"); Assert.AreEqual (HtmlWriterState.Tag, html.WriterState); html.WriteStartTag (HtmlTagId.P); Assert.AreEqual (HtmlWriterState.Tag, html.WriterState); // make sure that we can't write an attribute value yet Assert.Throws<InvalidOperationException> (() => html.WriteAttributeValue ("attrValue")); Assert.Throws<InvalidOperationException> (() => html.WriteAttributeValue ("attrValue".ToCharArray (), 0, 9)); html.WriteAttributeName (HtmlAttributeId.Class); Assert.AreEqual (HtmlWriterState.Attribute, html.WriterState); html.WriteAttributeValue ("paragraph"); Assert.AreEqual (HtmlWriterState.Tag, html.WriterState); html.WriteText ("special characters in this text should get encoded: <>'&\n"); html.WriteMarkupText ("special characters should not get encoded: <>"); Assert.AreEqual (HtmlWriterState.Default, html.WriterState); html.WriteEndTag (HtmlTagId.P); html.WriteEndTag (HtmlTagId.Body); html.WriteEndTag ("html"); } Assert.AreEqual (expected, actual.ToString ()); }