/// <summary>
/// Creates a HTML fragment from a part of a document.
/// </summary>
/// <param name="document">The document to create HTML from.</param>
/// <param name="highlighter">The highlighter used to highlight the document. <c>null</c> is valid and will create HTML without any highlighting.</param>
/// <param name="segment">The part of the document to create HTML for. You can pass <c>null</c> to create HTML for the whole document.</param>
/// <param name="options">The options for the HTML creation.</param>
/// <returns>HTML code for the document part.</returns>
public static string CreateHtmlFragment(TextDocument document, IHighlighter highlighter, ISegment segment, HtmlOptions options)
{
if (document == null)
throw new ArgumentNullException("document");
if (options == null)
throw new ArgumentNullException("options");
if (highlighter != null && highlighter.Document != document)
throw new ArgumentException("Highlighter does not belong to the specified document.");
if (segment == null)
segment = new SimpleSegment(0, document.TextLength);
StringBuilder html = new StringBuilder();
int segmentEndOffset = segment.EndOffset;
DocumentLine line = document.GetLineByOffset(segment.Offset);
while (line != null && line.Offset < segmentEndOffset) {
HighlightedLine highlightedLine;
if (highlighter != null)
highlightedLine = highlighter.HighlightLine(line.LineNumber);
else
highlightedLine = new HighlightedLine(document, line);
SimpleSegment s = segment.GetOverlap(line);
if (html.Length > 0)
html.AppendLine("<br>");
html.Append(highlightedLine.ToHtml(s.Offset, s.EndOffset, options));
line = line.NextLine;
}
return html.ToString();
}
/// <summary>
/// Creates a HTML fragment for the selected text.
/// </summary>
public string CreateHtmlFragment(HtmlOptions options)
{
if (options == null)
throw new ArgumentNullException("options");
IHighlighter highlighter = textArea.GetService(typeof(IHighlighter)) as IHighlighter;
StringBuilder html = new StringBuilder();
bool first = true;
foreach (ISegment selectedSegment in this.Segments) {
if (first)
first = false;
else
html.AppendLine("<br>");
html.Append(HtmlClipboard.CreateHtmlFragment(textArea.Document, highlighter, selectedSegment, options));
}
return html.ToString();
}
/// <summary>
/// Escapes text and writes the result to the StringBuilder.
/// </summary>
internal static void EscapeHtml(StringWriter w, string text, HtmlOptions options)
{
int spaceCount = -1;
foreach (char c in text) {
if (c == ' ') {
if (spaceCount < 0)
w.Write(" ");
else
spaceCount++;
} else if (c == '\t') {
if (spaceCount < 0)
spaceCount = 0;
spaceCount += options.TabSize;
} else {
if (spaceCount == 1) {
w.Write(' ');
} else if (spaceCount >= 1) {
for (int i = 0; i < spaceCount; i++) {
w.Write(" ");
}
}
spaceCount = 0;
switch (c) {
case '<':
w.Write("<");
break;
case '>':
w.Write(">");
break;
case '&':
w.Write("&");
break;
case '"':
w.Write(""");
break;
default:
w.Write(c);
break;
}
}
}
for (int i = 0; i < spaceCount; i++) {
w.Write(" ");
}
}
