void WriteText(HtmlWriter htmlWriter, string text)
{
var callback = HtmlTagCallback ?? DefaultHtmlTagCallback;
var content = text.ToCharArray();
int endIndex = content.Length;
int startIndex = 0;
UrlMatch match;
int count;
do
{
count = endIndex - startIndex;
if (scanner.Scan(content, startIndex, count, out match))
{
count = match.EndIndex - match.StartIndex;
if (match.StartIndex > startIndex)
{
// write everything up to the match
htmlWriter.WriteText(content, startIndex, match.StartIndex - startIndex);
}
var href = match.Prefix + new string (content, match.StartIndex, count);
var ctx = new TextToHtmlTagContext(HtmlTagId.A, new HtmlAttribute(HtmlAttributeId.Href, href));
callback(ctx, htmlWriter);
if (!ctx.SuppressInnerContent)
{
htmlWriter.WriteText(content, match.StartIndex, count);
}
if (!ctx.DeleteEndTag)
{
ctx.SetIsEndTag(true);
if (ctx.InvokeCallbackForEndTag)
{
callback(ctx, htmlWriter);
}
else
{
ctx.WriteTag(htmlWriter);
}
}
startIndex = match.EndIndex;
}
else
{
htmlWriter.WriteText(content, startIndex, count);
break;
}
} while (startIndex < endIndex);
}
/// <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 (!OutputHtmlFragment)
{
writer.Write("<html><body>");
}
if (!string.IsNullOrEmpty(Header))
{
if (HeaderFormat == HeaderFooterFormat.Text)
{
var converter = new TextToHtml {
OutputHtmlFragment = true
};
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 <TextToHtmlTagContext> ();
int currentQuoteDepth = 0, quoteDepth;
TextToHtmlTagContext ctx;
string line;
while ((line = reader.ReadLine()) != null)
{
line = Unquote(line, out quoteDepth);
while (currentQuoteDepth < quoteDepth)
{
ctx = new TextToHtmlTagContext(HtmlTagId.BlockQuote);
callback(ctx, htmlWriter);
currentQuoteDepth++;
stack.Add(ctx);
}
while (quoteDepth < currentQuoteDepth)
{
ctx = stack[stack.Count - 1];
stack.RemoveAt(stack.Count - 1);
if (!SuppressContent(stack) && !ctx.DeleteEndTag)
{
ctx.SetIsEndTag(true);
if (ctx.InvokeCallbackForEndTag)
{
callback(ctx, htmlWriter);
}
else
{
ctx.WriteTag(htmlWriter);
}
}
if (ctx.TagId == HtmlTagId.BlockQuote)
{
currentQuoteDepth--;
}
}
if (!SuppressContent(stack))
{
WriteText(htmlWriter, line);
ctx = new TextToHtmlTagContext(HtmlTagId.Br);
callback(ctx, htmlWriter);
}
}
for (int i = stack.Count; i > 0; i--)
{
ctx = stack[i - 1];
ctx.SetIsEndTag(true);
if (ctx.InvokeCallbackForEndTag)
{
callback(ctx, htmlWriter);
}
else
{
ctx.WriteTag(htmlWriter);
}
}
htmlWriter.Flush();
}
if (!string.IsNullOrEmpty(Footer))
{
if (FooterFormat == HeaderFooterFormat.Text)
{
var converter = new TextToHtml {
OutputHtmlFragment = true
};
using (var sr = new StringReader(Footer))
converter.Convert(sr, writer);
}
else
{
writer.Write(Footer);
}
}
if (!OutputHtmlFragment)
{
writer.Write("</body></html>");
}
}
/// <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<TextToHtmlTagContext> ();
int currentQuoteDepth = 0, quoteDepth;
TextToHtmlTagContext ctx;
string line;
while ((line = reader.ReadLine ()) != null) {
line = Unquote (line, out quoteDepth);
while (currentQuoteDepth < quoteDepth) {
ctx = new TextToHtmlTagContext (HtmlTagId.BlockQuote);
callback (ctx, htmlWriter);
currentQuoteDepth++;
stack.Add (ctx);
}
while (quoteDepth < currentQuoteDepth) {
ctx = stack[stack.Count - 1];
stack.RemoveAt (stack.Count - 1);
if (!SuppressContent (stack) && !ctx.DeleteEndTag) {
ctx.SetIsEndTag (true);
if (ctx.InvokeCallbackForEndTag)
callback (ctx, htmlWriter);
else
ctx.WriteTag (htmlWriter);
}
if (ctx.TagId == HtmlTagId.BlockQuote)
currentQuoteDepth--;
}
if (!SuppressContent (stack)) {
WriteText (htmlWriter, line);
ctx = new TextToHtmlTagContext (HtmlTagId.Br);
callback (ctx, htmlWriter);
}
}
for (int i = stack.Count; i > 0; i--) {
ctx = stack[i - 1];
ctx.SetIsEndTag (true);
if (ctx.InvokeCallbackForEndTag)
callback (ctx, htmlWriter);
else
ctx.WriteTag (htmlWriter);
}
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);
}
}
}
void WriteText (HtmlWriter htmlWriter, string text)
{
var callback = HtmlTagCallback ?? DefaultHtmlTagCallback;
var content = text.ToCharArray ();
int endIndex = content.Length;
int startIndex = 0;
UrlMatch match;
int count;
do {
count = endIndex - startIndex;
if (scanner.Scan (content, startIndex, count, out match)) {
count = match.EndIndex - match.StartIndex;
if (match.StartIndex > startIndex) {
// write everything up to the match
htmlWriter.WriteText (content, startIndex, match.StartIndex - startIndex);
}
var href = match.Prefix + new string (content, match.StartIndex, count);
var ctx = new TextToHtmlTagContext (HtmlTagId.A, new HtmlAttribute (HtmlAttributeId.Href, href));
callback (ctx, htmlWriter);
if (!ctx.SuppressInnerContent)
htmlWriter.WriteText (content, match.StartIndex, count);
if (!ctx.DeleteEndTag) {
ctx.SetIsEndTag (true);
if (ctx.InvokeCallbackForEndTag)
callback (ctx, htmlWriter);
else
ctx.WriteTag (htmlWriter);
}
startIndex = match.EndIndex;
} else {
htmlWriter.WriteText (content, startIndex, count);
break;
}
} while (startIndex < endIndex);
}