/// <summary>
/// Produces code minifiction of JS content by using
/// Microsoft Ajax JS Minifier
/// </summary>
/// <param name="content">JS content</param>
/// <param name="isInlineCode">Flag whether the content is inline code</param>
/// <param name="encoding">Text encoding</param>
/// <returns>Minification result</returns>
public CodeMinificationResult Minify(string content, bool isInlineCode, Encoding encoding)
{
if (string.IsNullOrWhiteSpace(content))
{
return(new CodeMinificationResult(string.Empty));
}
string newContent;
var errorReporter = new MsAjaxJsErrorReporter();
var errors = new List <MinificationErrorInfo>();
var warnings = new List <MinificationErrorInfo>();
var jsParserConfiguration = isInlineCode ? GetInlineJsParserSettings() : GetEmbeddedJsParserSettings();
var jsParser = new JSParser
{
Settings = jsParserConfiguration
};
jsParser.CompilerError += errorReporter.JsMinificationErrorHandler;
try
{
var stringBuilder = new StringBuilder();
using (var stringWriter = new StringWriter(stringBuilder, CultureInfo.InvariantCulture))
{
Block block = jsParser.Parse(content);
if (block != null)
{
if (jsParserConfiguration.Format == JavaScriptFormat.JSON)
{
// Use a JSON output visitor
if (!JSONOutputVisitor.Apply(stringWriter, block, jsParserConfiguration))
{
errors.Add(new MinificationErrorInfo(MsAjaxStrings.ErrorMessage_InvalidJsonOutput));
}
}
else
{
// Use normal output visitor
OutputVisitor.Apply(stringWriter, block, jsParserConfiguration);
}
}
}
newContent = stringBuilder.ToString();
}
finally
{
jsParser.CompilerError -= errorReporter.JsMinificationErrorHandler;
}
errors.AddRange(errorReporter.Errors);
warnings.AddRange(errorReporter.Warnings);
return(new CodeMinificationResult(newContent, errors, warnings));
}
private void InnerMinify(IAsset asset, JSParser jsParser)
{
string newContent;
string assetUrl = asset.Url;
var documentContext = new DocumentContext(asset.Content)
{
FileContext = assetUrl
};
jsParser.CompilerError += ParserErrorHandler;
try
{
var stringBuilder = new StringBuilder();
using (var stringWriter = new StringWriter(stringBuilder, CultureInfo.InvariantCulture))
{
Block block = jsParser.Parse(documentContext);
if (block != null)
{
if (_jsParserConfiguration.Format == JavaScriptFormat.JSON)
{
// Use a JSON output visitor
if (!JSONOutputVisitor.Apply(stringWriter, block, _jsParserConfiguration))
{
throw new MicrosoftAjaxParsingException(Strings.Minifiers_InvalidJsonOutput);
}
}
else
{
// Use normal output visitor
OutputVisitor.Apply(stringWriter, block, _jsParserConfiguration);
}
}
}
newContent = stringBuilder.ToString();
}
catch (MicrosoftAjaxParsingException e)
{
throw new AssetMinificationException(
string.Format(CoreStrings.Minifiers_MinificationSyntaxError,
CODE_TYPE, assetUrl, MINIFIER_NAME, e.Message), e);
}
catch (Exception e)
{
throw new AssetMinificationException(
string.Format(CoreStrings.Minifiers_MinificationFailed,
CODE_TYPE, assetUrl, MINIFIER_NAME, e.Message), e);
}
finally
{
jsParser.CompilerError -= ParserErrorHandler;
}
asset.Content = newContent;
asset.Minified = true;
}
private void ProcessJavaScript(IList <InputGroup> inputGroups, SwitchParser switchParser, string outputPath, SymbolMap symbolMap, Encoding outputEncoding)
{
var settings = switchParser.JSSettings;
TextWriter mapWriter = null;
ISourceMap sourceMap = null;
try
{
// if we want a symbols map, we need to set it up now
if (symbolMap != null && !settings.PreprocessOnly)
{
// if we specified the path, use it. Otherwise just use the output path with
// ".map" appended to the end. Eg: output.js => output.js.map
var symbolMapPath = symbolMap.Path.IsNullOrWhiteSpace()
? outputPath + ".map"
: symbolMap.Path;
// create the map writer and the source map implementation.
// look at the Name attribute and implement the proper one.
// the encoding needs to be UTF-8 WITHOUT a BOM or it won't work.
if (!FileWriteOperation(symbolMapPath, switchParser.Clobber, () =>
{
mapWriter = new StreamWriter(symbolMapPath, false, new UTF8Encoding(false));
sourceMap = SourceMapFactory.Create(mapWriter, symbolMap.Name);
if (sourceMap != null)
{
// if we get here, the symbol map now owns the stream and we can null it out so
// we don't double-close it
mapWriter = null;
settings.SymbolsMap = sourceMap;
// copy some property values
sourceMap.SourceRoot = symbolMap.SourceRoot.IfNullOrWhiteSpace(null);
sourceMap.SafeHeader = symbolMap.SafeHeader.GetValueOrDefault(false);
// start the package
sourceMap.StartPackage(outputPath, symbolMapPath);
}
return(true);
}))
{
// could not write file
Log.LogError(Strings.CouldNotWriteOutputFile, symbolMapPath);
}
}
// save the original term settings. We'll make sure to set this back again
// for the last item in the group, but we'll make sure it's TRUE for all the others.
var originalTermSetting = settings.TermSemicolons;
var currentSourceOrigin = SourceOrigin.Project;
var parser = new JSParser();
parser.CompilerError += (sender, ea) =>
{
// if the input group isn't project, then we only want to report sev-0 errors.
// regardless, don't show any errors that have a severity lower (greater numeric value)
// than the warning level specified.
if ((currentSourceOrigin == SourceOrigin.Project || ea.Error.Severity == 0) &&
ea.Error.Severity <= switchParser.WarningLevel)
{
LogContextError(ea.Error);
}
};
var outputBuilder = new StringBuilder(8192);
using (var writer = new StringWriter(outputBuilder, CultureInfo.InvariantCulture))
{
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 (settings.PreprocessOnly)
{
parser.EchoWriter = writer;
if (inputGroupIndex > 0)
{
// not the first group, so output the appropriate newline
// sequence before we output the group.
writer.Write(settings.LineTerminator);
}
}
else
{
// not preprocess-only, so make sure the echo writer is null
parser.EchoWriter = null;
}
// parse the input
var block = parser.Parse(inputGroup.Source, settings);
if (block != null && !settings.PreprocessOnly)
{
if (inputGroupIndex > 0)
{
// not the first group, so output the appropriate newline
// sequence before we output the group.
writer.Write(settings.LineTerminator);
}
// minify the AST to the output
if (settings.Format == JavaScriptFormat.JSON)
{
if (!JSONOutputVisitor.Apply(writer, block, settings))
{
Log.LogError(Strings.InvalidJSONOutput);
}
}
else
{
OutputVisitor.Apply(writer, block, settings);
}
}
}
}
// write output
if (!Log.HasLoggedErrors)
{
if (!FileWriteOperation(outputPath, switchParser.Clobber, () =>
{
using (var writer = new StreamWriter(outputPath, false, outputEncoding))
{
// write the combined minified code
writer.Write(outputBuilder.ToString());
if (!settings.PreprocessOnly)
{
// give the map (if any) a chance to add something
settings.SymbolsMap.IfNotNull(m => m.EndFile(
writer,
settings.LineTerminator));
}
}
return(true);
}))
{
// could not write file
Log.LogError(Strings.CouldNotWriteOutputFile, outputPath);
}
}
else
{
Log.LogWarning(Strings.DidNotMinify, outputPath, Strings.ThereWereErrors);
if (File.Exists(outputPath))
{
File.Delete(outputPath);
}
}
}
finally
{
if (sourceMap != null)
{
mapWriter = null;
settings.SymbolsMap = null;
sourceMap.EndPackage();
sourceMap.Dispose();
}
if (mapWriter != null)
{
mapWriter.Close();
}
}
}
public void RunErrorTest(string settingsSwitches, params JSError[] expectedErrorArray)
{
// open the stack trace for this call
StackTrace stackTrace = new StackTrace();
string testClass = null;
string testName = null;
// save the name of the current method (RunTest)
string currentMethodName = MethodInfo.GetCurrentMethod().Name;
// loop from the previous frame up until we get a method name that is not the
// same as the current method name
for (int ndx = 1; ndx < stackTrace.FrameCount; ++ndx)
{
// get the frame
StackFrame stackFrame = stackTrace.GetFrame(ndx);
// we have different entry points with the same name -- we're interested
// in the first one that ISN'T the same name as our method
MethodBase methodBase = stackFrame.GetMethod();
if (methodBase.Name != currentMethodName)
{
// the calling method's name is the test name - we use this as-is for the output file name
// and we use any portion before an underscore as the input file
testName = methodBase.Name;
// get the method's class - we use this as the subfolder under input/output/expected
testClass = methodBase.DeclaringType.Name;
break;
}
}
// we definitely should be able to find a function on the stack frame that
// has a different name than this function, but just in case...
Debug.Assert(testName != null && testClass != null, "Couldn't locate calling stack frame");
// the input file is the portion of the test name before the underscore (if any)
string inputFile = testName.Split('_')[0];
// get the input and output paths
string inputPath = GetJsPath(
m_inputFolder,
testClass,
inputFile,
false);
Assert.IsTrue(File.Exists(inputPath), "Input File does not exist: {0}", inputPath);
var outputPath = GetJsPath(
m_outputFolder,
testClass,
testName,
false);
if (File.Exists(outputPath))
{
// if it exists already, delete it
File.Delete(outputPath);
}
else
{
// otherwise make sure the directory exists
Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
}
/*int expectedErrorCode = (int)(0x800A0000 + (int)expectedError);
* Trace.WriteLine(string.Empty);
* Trace.WriteLine(string.Format("Expecting error 0x{0:X}", expectedErrorCode));*/
// if we were passed a string containing command-line settings...
var switchParser = new SwitchParser();
if (!string.IsNullOrEmpty(settingsSwitches))
{
// parse the string now
switchParser.Parse(settingsSwitches);
}
// read the input JS
string jsSource;
using (var reader = new StreamReader(inputPath, GetJSEncoding(switchParser.EncodingInputName)))
{
jsSource = reader.ReadToEnd();
}
Trace.Write("INPUT FILE: ");
Trace.WriteLine(inputPath);
Trace.WriteLine(jsSource);
var testPassed = true;
var expectedErrorList = new List <JSError>(expectedErrorArray);
var errorList = new List <ContextError>();
var parser = new JSParser();
parser.CompilerError += (source, e) =>
{
errorList.Add(e.Error);
};
var sb = new StringBuilder();
using (var writer = new StringWriter(sb))
{
if (switchParser.JSSettings.PreprocessOnly)
{
parser.EchoWriter = writer;
}
// normal -- just run it through the parser
var block = parser.Parse(new DocumentContext(jsSource)
{
FileContext = inputPath
}, switchParser.JSSettings);
if (!switchParser.JSSettings.PreprocessOnly)
{
// look at the settings for the proper output visitor
if (switchParser.JSSettings.Format == JavaScriptFormat.JSON)
{
{
if (!JSONOutputVisitor.Apply(writer, block, switchParser.JSSettings))
{
Trace.WriteLine("JSON OUTPUT ERRORS!");
}
}
}
else
{
OutputVisitor.Apply(writer, block, switchParser.JSSettings);
}
}
}
var crunchedCode = sb.ToString();
// output the crunched code using the proper output encoding
using (var outputStream = new StreamWriter(outputPath, false, GetJSEncoding(switchParser.EncodingOutputName)))
{
outputStream.Write(crunchedCode);
}
Trace.WriteLine(string.Empty);
Trace.WriteLine("---ERRORS---");
foreach (var err in errorList)
{
Trace.WriteLine(((JSError)err.ErrorNumber).ToString());
}
Trace.WriteLine(string.Empty);
Trace.Indent();
foreach (var err in errorList)
{
// log the error
Trace.WriteLine(string.Empty);
Trace.WriteLine(string.Format("Error {0} at Line {1}, Column {2}: {3}", err.ErrorCode, err.StartLine, err.StartColumn, err.Message));
Trace.Indent();
Trace.WriteLine(err.Message);
int index = expectedErrorList.IndexOf((JSError)err.ErrorNumber);
if (index >= 0)
{
// expected error -- remove it from the list so we can tell what we're missing later
expectedErrorList.RemoveAt(index);
}
else
{
// unexpected error
testPassed = false;
Trace.WriteLine("UNEXPECTED");
}
Trace.Unindent();
}
Trace.Unindent();
// the list should be empty now -- if it isn't, then there was an expected error that didn't happen
if (expectedErrorList.Count > 0)
{
testPassed = false;
Trace.WriteLine(string.Empty);
Trace.WriteLine("---MISSING ERRORS---");
Trace.Indent();
foreach (JSError jsError in expectedErrorList)
{
Trace.WriteLine(jsError.ToString());
}
Trace.Unindent();
}
if (!testPassed)
{
Trace.WriteLine("");
Trace.WriteLine("UNEXPECTED ERROR RESULTS");
}
// compute the path to the expected file
string expectedPath = GetJsPath(
m_expectedFolder,
testClass,
testName,
false);
Trace.WriteLine(string.Empty);
Trace.WriteLine("odd \"" + expectedPath + "\" \"" + outputPath + "\"");
Trace.WriteLine(string.Empty);
Trace.WriteLine("---Expected Code---");
TraceFileContents(expectedPath);
Trace.WriteLine(string.Empty);
Trace.WriteLine("---Resulting Code---");
TraceFileContents(outputPath);
Assert.IsTrue(CompareTextFiles(outputPath, expectedPath), "The expected output ({1}) and actual output ({0}) do not match!", outputPath, expectedPath);
Assert.IsTrue(testPassed, "Test failed");
}
