/// <summary>
/// Convert the contents of <paramref name="reader"/> from the <see cref="InputFormat"/> to the
/// <see cref="OutputFormat"/> and uses the <paramref name="writer"/> to write the resulting text.
/// </summary>
/// <remarks>
/// Converts the contents of <paramref name="reader"/> from the <see cref="InputFormat"/> to the
/// <see cref="OutputFormat"/> and uses the <paramref name="writer"/> to write the resulting text.
/// </remarks>
/// <param name="reader">The text reader.</param>
/// <param name="writer">The text writer.</param>
/// <exception cref="System.ArgumentNullException">
/// <para><paramref name="reader"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="writer"/> is <c>null</c>.</para>
/// </exception>
public override void Convert (TextReader reader, TextWriter writer)
{
if (reader == null)
throw new ArgumentNullException (nameof (reader));
if (writer == null)
throw new ArgumentNullException (nameof (writer));
if (!string.IsNullOrEmpty (Header)) {
if (HeaderFormat == HeaderFooterFormat.Text) {
var converter = new TextToHtml ();
using (var sr = new StringReader (Header))
converter.Convert (sr, writer);
} else {
writer.Write (Header);
}
}
using (var htmlWriter = new HtmlWriter (writer)) {
var callback = HtmlTagCallback ?? DefaultHtmlTagCallback;
var stack = new List<HtmlToHtmlTagContext> ();
var tokenizer = new HtmlTokenizer (reader);
HtmlToHtmlTagContext ctx;
HtmlToken token;
while (tokenizer.ReadNextToken (out token)) {
switch (token.Kind) {
default:
if (!SuppressContent (stack))
htmlWriter.WriteToken (token);
break;
case HtmlTokenKind.Tag:
var tag = (HtmlTagToken) token;
if (!tag.IsEndTag) {
//if (NormalizeHtml && AutoClosingTags.Contains (startTag.TagName) &&
// (ctx = Pop (stack, startTag.TagName)) != null &&
// ctx.InvokeCallbackForEndTag && !SuppressContent (stack)) {
// var value = string.Format ("</{0}>", ctx.TagName);
// var name = ctx.TagName;
//
// ctx = new HtmlToHtmlTagContext (new HtmlTokenTag (HtmlTokenKind.EndTag, name, value)) {
// InvokeCallbackForEndTag = ctx.InvokeCallbackForEndTag,
// SuppressInnerContent = ctx.SuppressInnerContent,
// DeleteEndTag = ctx.DeleteEndTag,
// DeleteTag = ctx.DeleteTag
// };
// callback (ctx, htmlWriter);
//}
if (!tag.IsEmptyElement) {
ctx = new HtmlToHtmlTagContext (tag);
if (FilterHtml && ctx.TagId == HtmlTagId.Script) {
ctx.SuppressInnerContent = true;
ctx.DeleteEndTag = true;
ctx.DeleteTag = true;
} else if (!SuppressContent (stack)) {
callback (ctx, htmlWriter);
}
stack.Add (ctx);
} else if (!SuppressContent (stack)) {
ctx = new HtmlToHtmlTagContext (tag);
if (!FilterHtml || ctx.TagId != HtmlTagId.Script)
callback (ctx, htmlWriter);
}
} else {
if ((ctx = Pop (stack, tag.Name)) != null) {
if (!SuppressContent (stack)) {
if (ctx.InvokeCallbackForEndTag) {
ctx = new HtmlToHtmlTagContext (tag) {
InvokeCallbackForEndTag = ctx.InvokeCallbackForEndTag,
SuppressInnerContent = ctx.SuppressInnerContent,
DeleteEndTag = ctx.DeleteEndTag,
DeleteTag = ctx.DeleteTag
};
callback (ctx, htmlWriter);
} else if (!ctx.DeleteEndTag) {
htmlWriter.WriteEndTag (tag.Name);
}
}
} else if (!SuppressContent (stack)) {
ctx = new HtmlToHtmlTagContext (tag);
callback (ctx, htmlWriter);
}
}
break;
}
}
htmlWriter.Flush ();
}
if (!string.IsNullOrEmpty (Footer)) {
if (FooterFormat == HeaderFooterFormat.Text) {
var converter = new TextToHtml ();
using (var sr = new StringReader (Footer))
converter.Convert (sr, writer);
} else {
writer.Write (Footer);
}
}
}
static void VerifyHtmlTokenizerOutput (string path)
{
var tokens = Path.ChangeExtension (path, ".tokens");
var expected = File.Exists (tokens) ? File.ReadAllText (tokens).Replace ("\r", "") : string.Empty;
var actual = new StringBuilder ();
using (var textReader = File.OpenText (path)) {
var tokenizer = new HtmlTokenizer (textReader);
HtmlToken token;
Assert.AreEqual (HtmlTokenizerState.Data, tokenizer.TokenizerState);
while (tokenizer.ReadNextToken (out token)) {
actual.AppendFormat ("{0}: ", token.Kind);
switch (token.Kind) {
case HtmlTokenKind.ScriptData:
case HtmlTokenKind.CData:
case HtmlTokenKind.Data:
var text = (HtmlDataToken) token;
for (int i = 0; i < text.Data.Length; i++) {
switch (text.Data[i]) {
case '\f': actual.Append ("\\f"); break;
case '\t': actual.Append ("\\t"); break;
case '\r': break;
case '\n': actual.Append ("\\n"); break;
default: actual.Append (text.Data[i]); break;
}
}
actual.Append ('\n');
break;
case HtmlTokenKind.Tag:
var tag = (HtmlTagToken) token;
actual.AppendFormat ("<{0}{1}", tag.IsEndTag ? "/" : "", tag.Name);
foreach (var attribute in tag.Attributes) {
if (attribute.Value != null)
actual.AppendFormat (" {0}={1}", attribute.Name, Quote (attribute.Value));
else
actual.AppendFormat (" {0}", attribute.Name);
}
actual.Append (tag.IsEmptyElement ? "/>" : ">");
actual.Append ('\n');
break;
case HtmlTokenKind.Comment:
var comment = (HtmlCommentToken) token;
actual.Append (comment.Comment);
actual.Append ('\n');
break;
case HtmlTokenKind.DocType:
var doctype = (HtmlDocTypeToken) token;
if (doctype.ForceQuirksMode)
actual.Append ("<!-- force quirks mode -->");
actual.Append ("<!DOCTYPE");
if (doctype.Name != null)
actual.AppendFormat (" {0}", doctype.Name.ToUpperInvariant ());
if (doctype.PublicIdentifier != null) {
actual.AppendFormat (" PUBLIC {0}", Quote (doctype.PublicIdentifier));
if (doctype.SystemIdentifier != null)
actual.AppendFormat (" {0}", Quote (doctype.SystemIdentifier));
} else if (doctype.SystemIdentifier != null) {
actual.AppendFormat (" SYSTEM {0}", Quote (doctype.SystemIdentifier));
}
actual.Append (">");
actual.Append ('\n');
break;
default:
Assert.Fail ("Unhandled token type: {0}", token.Kind);
break;
}
}
Assert.AreEqual (HtmlTokenizerState.EndOfFile, tokenizer.TokenizerState);
}
if (!File.Exists (tokens))
File.WriteAllText (tokens, actual.ToString ());
Assert.AreEqual (expected, actual.ToString (), "The token stream does not match the expected tokens.");
}
