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#region Copyright © 2001-2003 Jean-Claude Manoli [jc@manoli.net]
/*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the author(s) be held liable for any damages arising from
* the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not
* be misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
#endregion
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using Nop.Core;
namespace Nop.Services.Html.CodeFormatter;
///
/// Provides a base implementation for all code formatters.
///
///
///
/// To display the formatted code on your web site, the web page must
/// refer to a stylesheet that defines the formatting for the different
/// CSS classes generated by CSharpFormat:
/// .csharpcode, pre, .rem, .kwrd, .str, .op, .preproc, .alt, .lnum.
///
///
/// Note that if you have multi-line comments in your source code
/// (like /* ... */), the "line numbers" or "alternate line background"
/// options will generate code that is not strictly HTML 4.01 compliant.
/// The code will still look good with IE5+ or Mozilla 0.8+.
///
///
public abstract partial class SourceFormat
{
///
/// Gets the CSS stylesheet as a stream.
///
/// A text
public static Stream GetCssStream()
{
return Assembly.GetExecutingAssembly().GetManifestResourceStream(
"Manoli.Utils.CSharpFormat.csharp.css");
}
///
/// Gets the CSS stylesheet as a string.
///
/// A string containing the CSS definitions.
public static string GetCssString()
{
using var reader = new StreamReader(GetCssStream());
return reader.ReadToEnd();
}
///
/// Gets or sets the tabs width.
///
/// The number of space characters to substitute for tab
/// characters. The default is 4, unless overridden is a
/// derived class.
public byte TabSpaces { get; set; }
///
/// Enables or disables line numbers in output.
///
/// When true, line numbers are generated.
/// The default is false.
public bool LineNumbers { get; set; }
///
/// Enables or disables alternating line background.
///
/// When true, lines background is alternated.
/// The default is false.
public bool Alternate { get; set; }
///
/// Enables or disables the embedded CSS style sheet.
///
/// When true, the CSS <style> element is included
/// in the HTML output. The default is false.
public bool EmbedStyleSheet { get; set; }
/// Transform source code to HTML 4.01.
///
///
/// Transforms a source code stream to HTML 4.01.
///
/// Source code stream.
/// A string containing the HTML formatted code.
public string FormatCode(Stream source)
{
using var reader = new StreamReader(source);
var s = reader.ReadToEnd();
return FormatCode(s, LineNumbers, Alternate, EmbedStyleSheet, false);
}
///
/// Transforms a source code string to HTML 4.01.
///
/// A string containing the HTML formatted code.
public string FormatCode(string source)
{
return FormatCode(source, LineNumbers, Alternate, EmbedStyleSheet, false);
}
///
/// Allows formatting a part of the code in a different language,
/// for example a JavaScript block inside an HTML file.
///
public string FormatSubCode(string source)
{
return FormatCode(source, false, false, false, true);
}
///
/// The regular expression used to capture language tokens.
///
protected Regex CodeRegex { get; set; }
///
/// Called to evaluate the HTML fragment corresponding to each
/// matching token in the code.
///
/// The A string containing the HTML code fragment.
protected abstract string MatchEval(Match match);
//does the formatting job
protected string FormatCode(string source, bool lineNumbers,
bool alternate, bool embedStyleSheet, bool subCode)
{
//replace special characters
var sb = new StringBuilder(source);
if (!subCode)
{
sb.Replace("&", "&");
sb.Replace("<", "<");
sb.Replace(">", ">");
sb.Replace("\t", string.Empty.PadRight(TabSpaces));
}
//color the code
source = CodeRegex.Replace(sb.ToString(), MatchEval);
sb = new StringBuilder();
if (embedStyleSheet)
{
sb.AppendFormat("\n");
}
if (lineNumbers || alternate) //we have to process the code line by line
{
if (!subCode)
sb.Append("\n");
var reader = new StringReader(source);
var i = 0;
const string spaces = " ";
string line;
while ((line = reader.ReadLine()) != null)
{
i++;
if (alternate && i % 2 == 1)
{
sb.Append("");
}
else
{
sb.Append("");
}
if (lineNumbers)
{
var order = (int)Math.Log10(i);
sb.Append(""
+ spaces[0..(3 - order)] + i
+ ": ");
}
sb.Append(line.Length == 0 ? " " : line);
sb.Append("\n");
}
reader.Close();
if (!subCode)
sb.Append("");
}
else
{
//have to use a because IE below ver 6 does not understand
//the "white-space: pre" CSS value
if (!subCode)
sb.Append("\n");
sb.Append(source);
if (!subCode)
sb.Append("");
}
return sb.ToString();
}
}