public static bool Apply(TextWriter writer, AstNode node, CodeSettings settings)
{
if (node != null)
{
var visitor = new JSONOutputVisitor(writer, settings);
node.Accept(visitor);
return(visitor.IsValid);
}
return(false);
}
/// <summary>
/// Crunched JS string passed to it, returning crunched string.
/// The ErrorList property will be set with any errors found during the minification process.
/// </summary>
/// <param name="source">source Javascript</param>
/// <param name="codeSettings">code minification settings</param>
/// <returns>minified Javascript</returns>
public string MinifyJavaScript(string source, CodeSettings codeSettings)
{
// default is an empty string
var crunched = string.Empty;
// reset the errors builder
m_errorList = new List <ContextError>();
// create the parser and hook the engine error event
var parser = new JSParser();
parser.CompilerError += OnJavaScriptError;
try
{
var preprocessOnly = codeSettings != null && codeSettings.PreprocessOnly;
var sb = new StringBuilder();
using (var stringWriter = new StringWriter(sb, CultureInfo.InvariantCulture))
{
if (preprocessOnly)
{
parser.EchoWriter = stringWriter;
}
// parse the input
var scriptBlock = parser.Parse(new DocumentContext(source)
{
FileContext = this.FileName
}, codeSettings);
if (scriptBlock != null && !preprocessOnly)
{
// we'll return the crunched code
if (codeSettings != null && codeSettings.Format == JavaScriptFormat.JSON)
{
// we're going to use a different output visitor -- one
// that specifically returns valid JSON.
if (!JSONOutputVisitor.Apply(stringWriter, scriptBlock, codeSettings))
{
m_errorList.Add(new ContextError()
{
Severity = 0,
File = this.FileName,
Message = CommonStrings.InvalidJSONOutput,
});
}
}
else
{
// just use the normal output visitor
OutputVisitor.Apply(stringWriter, scriptBlock, codeSettings);
}
}
}
crunched = sb.ToString();
}
catch (Exception e)
{
m_errorList.Add(new ContextError()
{
Severity = 0,
File = this.FileName,
Message = e.Message,
});
throw;
}
return(crunched);
}
private int ProcessJSFile(IList <InputGroup> inputGroups, SwitchParser switchParser, StringBuilder outputBuilder)
{
var returnCode = 0;
var settings = switchParser.JSSettings;
var currentSourceOrigin = SourceOrigin.Project;
// blank line before
WriteProgress();
// create our parser object and hook up some events
var parser = new JSParser();
parser.UndefinedReference += OnUndefinedReference;
parser.CompilerError += (sender, ea) =>
{
var error = ea.Error;
if (currentSourceOrigin == SourceOrigin.Project || error.Severity == 0)
{
// ignore severity values greater than our severity level
// also ignore errors that are in our ignore list (if any)
if (error.Severity <= switchParser.WarningLevel)
{
// we found an error
m_errorsFound = true;
// write the error out
WriteError(error.ToString());
}
}
};
// output visitor requires a text writer, so make one from the string builder
using (var writer = new StringWriter(outputBuilder, CultureInfo.InvariantCulture))
{
var outputIndex = 0;
var originalTermSetting = settings.TermSemicolons;
for (var inputGroupIndex = 0; inputGroupIndex < inputGroups.Count; ++inputGroupIndex)
{
var inputGroup = inputGroups[inputGroupIndex];
currentSourceOrigin = inputGroup.Origin;
// for all but the last item, we want the term-semicolons setting to be true.
// but for the last entry, set it back to its original value
settings.TermSemicolons = inputGroupIndex < inputGroups.Count - 1 ? true : originalTermSetting;
// if this is preprocess-only or echo-input, then set up the writer as the echo writer for the parser
if (settings.PreprocessOnly || m_echoInput)
{
parser.EchoWriter = writer;
if (inputGroupIndex > 0)
{
// separate subsequent input groups with an appropriate line terminator
writer.Write(settings.LineTerminator);
writer.Write(';');
writer.Write(settings.LineTerminator);
}
}
else
{
// not a preprocess-only or echo - make sure the echo writer is null
parser.EchoWriter = null;
}
// parse the input code. Don't use a source context because it should already be
// in the source using ///#SOURCE comments as we assembled the input groups.
var scriptBlock = parser.Parse(inputGroup.Source, settings);
if (m_errorsFound)
{
WriteProgress();
}
if (m_outputTimer)
{
OutputTimingPoints(parser, inputGroupIndex, inputGroups.Count);
}
if (!settings.PreprocessOnly && !m_echoInput)
{
if (scriptBlock != null)
{
if (outputIndex++ > 0)
{
// separate subsequent input groups with an appropriate line terminator
writer.Write(settings.LineTerminator);
}
// crunch the output and write it to debug stream, but make sure
// the settings we use to output THIS chunk are correct
if (settings.Format == JavaScriptFormat.JSON)
{
if (!JSONOutputVisitor.Apply(writer, scriptBlock, settings))
{
returnCode = 1;
}
}
else
{
OutputVisitor.Apply(writer, scriptBlock, settings);
}
}
else
{
// no code?
WriteProgress(AjaxMin.NoParsedCode);
}
}
}
// give the symbols map a chance to write something at the bottom of the source file
// (and if this isn't preprocess-only or echo)
if (settings.SymbolsMap != null && !settings.PreprocessOnly && !m_echoInput)
{
settings.SymbolsMap.EndFile(writer, settings.LineTerminator);
}
}
if (switchParser.AnalyzeMode)
{
// blank line before
WriteProgress();
// output our report
CreateReport(parser.GlobalScope, switchParser);
}
return(returnCode);
}
/// <summary>
/// Crunched JS string passed to it, returning crunched string.
/// The ErrorList property will be set with any errors found during the minification process.
/// </summary>
/// <param name="source">source Javascript</param>
/// <param name="codeSettings">code minification settings</param>
/// <returns>minified Javascript</returns>
public string MinifyJavaScript(string source, CodeSettings codeSettings)
{
// default is an empty string
var crunched = string.Empty;
// reset the errors builder
m_errorList = new List <ContextError>();
// create the parser from the source string.
// pass null for the assumed globals array
var parser = new JSParser(source);
// file context is a property on the parser
parser.FileContext = FileName;
// hook the engine error event
parser.CompilerError += OnJavaScriptError;
try
{
if (codeSettings != null && codeSettings.PreprocessOnly)
{
// just run through the preprocessor only
crunched = parser.PreprocessOnly(codeSettings);
}
else
{
// parse the input
var scriptBlock = parser.Parse(codeSettings);
if (scriptBlock != null)
{
// we'll return the crunched code
if (codeSettings != null && codeSettings.Format == JavaScriptFormat.JSON)
{
// we're going to use a different output visitor -- one
// that specifically returns valid JSON.
var sb = new StringBuilder();
using (var stringWriter = new StringWriter(sb, CultureInfo.InvariantCulture))
{
if (!JSONOutputVisitor.Apply(stringWriter, scriptBlock))
{
m_errorList.Add(new ContextError(
true,
0,
null,
null,
null,
this.FileName,
0,
0,
0,
0,
JScript.InvalidJSONOutput));
}
}
crunched = sb.ToString();
}
else
{
// just use the normal output visitor
crunched = scriptBlock.ToCode();
}
}
}
}
catch (Exception e)
{
m_errorList.Add(new ContextError(
true,
0,
null,
null,
null,
this.FileName,
0,
0,
0,
0,
e.Message));
throw;
}
return(crunched);
}
