// SharpDevelop samples

// Copyright (c) 2010, AlphaSierraPapa

// All rights reserved.

//

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// - Redistributions in binary form must reproduce the above copyright notice, this list

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using System;

using System.Collections.Generic;

using System.IO;

using System.Text;

using System.Xml;

using ICSharpCode.AvalonEdit.Document;

using ICSharpCode.AvalonEdit.Highlighting;

namespace ICSharpCode.HtmlSyntaxColorizer

{

public class HtmlWriter

{

public bool AlternateLineBackground;

public bool ShowLineNumbers;

public string MainStyle = "font-size: small; font-family: Consolas, \"Courier New\", Courier, Monospace;";

public string LineStyle = "margin: 0em;";

public string AlternateLineStyle = "margin: 0em; width: 100%; background-color: #f0f0f0;";

#region Stylesheet cache

/// <summary>

/// Specifies whether a CSS stylesheet should be created to reduce the size of the created code.

/// The default value is true.

/// </summary>

public bool CreateStylesheet = true;

/// <summary>

/// Specifies the prefix to use in front of generate style class names.

/// </summary>

public string StyleClassPrefix = "code";

Dictionary<string, string> stylesheetCache = new Dictionary<string, string>();

StringBuilder stylesheet = new StringBuilder();

/// <summary>

/// Resets the CSS stylesheet cache. Stylesheet classes will be cached on GenerateHtml calls.

/// If you want to reuse the HtmlWriter for multiple .html files.

/// </summary>

public void ResetStylesheetCache()

{

stylesheetCache.Clear();

}

string GetClass(string style)

{

string className;

if (!stylesheetCache.TryGetValue(style, out className)) {

className = StyleClassPrefix + stylesheetCache.Count;

stylesheet.Append('.');

stylesheet.Append(className);

stylesheet.Append(" { ");

stylesheet.Append(style);

stylesheet.AppendLine(" }");

stylesheetCache[style] = className;

}

return className;

}

#endregion

public string GenerateHtml(string code, IHighlightingDefinition highlightDefinition)

{

return GenerateHtml(new TextDocument(code), highlightDefinition);

}

public string GenerateHtml(TextDocument document, IHighlightingDefinition highlightDefinition)

{

return GenerateHtml(document, new DocumentHighlighter(document, highlightDefinition));

}

public string GenerateHtml(TextDocument document, IHighlighter highlighter)

{

string myMainStyle = MainStyle;

string LineNumberStyle = "color: #606060;";

StringWriter output = new StringWriter();

if (ShowLineNumbers || AlternateLineBackground) {

output.Write("<div");

WriteStyle(output, myMainStyle);

output.WriteLine(">");

int longestNumberLength = 1 + (int)Math.Log10(document.LineCount);

for (int lineNumber = 1; lineNumber <= document.LineCount; lineNumber++) {

HighlightedLine line = highlighter.HighlightLine(lineNumber);

output.Write("<pre");

if (AlternateLineBackground && (lineNumber % 2) == 0) {

WriteStyle(output, AlternateLineStyle);

} else {

WriteStyle(output, LineStyle);

}

output.Write(">");

if (ShowLineNumbers) {

output.Write("<span");

WriteStyle(output, LineNumberStyle);

output.Write('>');

output.Write(lineNumber.ToString().PadLeft(longestNumberLength));

output.Write(": ");

output.Write("</span>");

}

PrintWords(output, line);

output.WriteLine("</pre>");

}

output.WriteLine("</div>");

} else {

output.Write("<pre");

WriteStyle(output, myMainStyle + LineStyle);

output.WriteLine(">");

for (int lineNumber = 1; lineNumber <= document.LineCount; lineNumber++) {

HighlightedLine line = highlighter.HighlightLine(lineNumber);

PrintWords(output, line);

output.WriteLine();

}

output.WriteLine("</pre>");

}

if (CreateStylesheet && stylesheet.Length > 0) {

string result = "<style type=\"text/css\">" + stylesheet.ToString() + "</style>" + output.ToString();

stylesheet = new StringBuilder();

return result;

} else {

return output.ToString();

}

}

void PrintWords(TextWriter writer, HighlightedLine line)

{

writer.Write(line.ToHtml(new MyHtmlOptions(this)));

}

class MyHtmlOptions : HtmlOptions

{

readonly HtmlWriter htmlWriter;

internal MyHtmlOptions(HtmlWriter htmlWriter)

{

this.htmlWriter = htmlWriter;

}

public override void WriteStyleAttributeForColor(TextWriter writer, HighlightingColor color)

{

htmlWriter.WriteStyle(writer, color.ToCss());

}

}

void WriteStyle(TextWriter writer, string style)

{

if (CreateStylesheet) {

writer.Write(" class=\"");

writer.Write(GetClass(style));

writer.Write('"');

} else {

writer.Write(" style='");

writer.Write(style);

writer.Write("'");

}

}

}

}