private bool m_preprocessOnly; // = false;
#endregion
#region file processing
private int ProcessJSFile(string sourceFileName, ResourceStrings resourceStrings, StringBuilder outputBuilder, ref bool lastEndedSemicolon, ref long sourceLength)
{
int retVal = 0;
// read our chunk of code
string source;
if (sourceFileName.Length > 0)
{
using (StreamReader reader = new StreamReader(sourceFileName, m_encodingInput))
{
WriteProgress(
StringMgr.GetString("CrunchingFile", Path.GetFileName(sourceFileName))
);
source = reader.ReadToEnd();
}
}
else
{
WriteProgress(StringMgr.GetString("CrunchingStdIn"));
try
{
// try setting the input encoding
Console.InputEncoding = m_encodingInput;
}
catch (IOException e)
{
// error setting the encoding input; just use whatever the default is
Debug.WriteLine(e.ToString());
}
source = Console.In.ReadToEnd();
if (m_analyze)
{
// calculate the actual number of bytes read using the input encoding
// and the string that we just read and
// add the number of bytes read into the input length.
sourceLength += Console.InputEncoding.GetByteCount(source);
}
else
{
// don't bother calculating the actual bytes -- the number of characters
// is sufficient if we're not doing the analysis
sourceLength += source.Length;
}
}
// add the input length to the running total
sourceLength += source.Length;
// create the a parser object for our chunk of code
JSParser parser = new JSParser(source);
// set up the file context for the parser
parser.FileContext = sourceFileName;
// hook the engine events
parser.CompilerError += OnCompilerError;
parser.UndefinedReference += OnUndefinedReference;
// put the resource strings object into the parser
parser.ResourceStrings = resourceStrings;
// set our flags
CodeSettings settings = new CodeSettings();
settings.ManualRenamesProperties = m_renameProperties;
settings.CollapseToLiteral = m_collapseToLiteral;
settings.CombineDuplicateLiterals = m_combineDuplicateLiterals;
settings.EvalLiteralExpressions = m_evalLiteralExpressions;
settings.EvalTreatment = m_evalTreatment;
settings.IndentSize = m_indentSize;
settings.InlineSafeStrings = m_safeForInline;
settings.LocalRenaming = m_localRenaming;
settings.MacSafariQuirks = m_macSafariQuirks;
settings.OutputMode = (m_prettyPrint ? OutputMode.MultipleLines : OutputMode.SingleLine);
settings.PreserveFunctionNames = m_preserveFunctionNames;
settings.RemoveFunctionExpressionNames = m_removeFunctionExpressionNames;
settings.RemoveUnneededCode = m_removeUnneededCode;
settings.StripDebugStatements = m_stripDebugStatements;
settings.AllowEmbeddedAspNetBlocks = m_allowAspNet;
settings.SetKnownGlobalNames(m_globals == null ? null : m_globals.ToArray());
settings.SetNoAutoRename(m_noAutoRename == null ? null : m_noAutoRename.ToArray());
settings.IgnoreConditionalCompilation = m_ignoreConditionalCompilation;
// if there are defined preprocessor names
if (m_defines != null && m_defines.Count > 0)
{
// set the list of defined names to our array of names
settings.SetPreprocessorDefines(m_defines.ToArray());
}
// if there are rename entries...
if (m_renameMap != null && m_renameMap.Count > 0)
{
// add each of them to the parser
foreach (var sourceName in m_renameMap.Keys)
{
settings.AddRenamePair(sourceName, m_renameMap[sourceName]);
}
}
// cast the kill switch numeric value to the appropriate TreeModifications enumeration
settings.KillSwitch = (TreeModifications)m_killSwitch;
string resultingCode = null;
if (m_preprocessOnly)
{
// we only want to preprocess the code. Call that api on the parser
resultingCode = parser.PreprocessOnly(settings);
}
else
{
Block scriptBlock = parser.Parse(settings);
if (scriptBlock != null)
{
if (m_analyze)
{
// output our report
CreateReport(parser.GlobalScope);
}
// crunch the output and write it to debug stream
resultingCode = scriptBlock.ToCode();
}
else
{
// no code?
WriteProgress(StringMgr.GetString("NoParsedCode"));
}
}
if (!string.IsNullOrEmpty(resultingCode))
{
// always output the crunched code to debug stream
System.Diagnostics.Debug.WriteLine(resultingCode);
// if the last block of code didn't end in a semi-colon,
// then we need to add one now
if (!lastEndedSemicolon)
{
outputBuilder.Append(';');
}
// we'll output either the crunched code (normal) or
// the raw source if we're just echoing the input
string outputCode = (m_echoInput ? source : resultingCode);
// send the output code to the output stream
outputBuilder.Append(outputCode);
// check if this string ended in a semi-colon so we'll know if
// we need to add one between this code and the next block (if any)
lastEndedSemicolon = (outputCode[outputCode.Length - 1] == ';');
}
else
{
// resulting code is null or empty
Debug.WriteLine(StringMgr.GetString("OutputEmpty"));
}
return(retVal);
}
/// <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);
}