Examples with SourceMapInfo org.eclipse.n4js.transpiler.AbstractTranspiler.SourceMapInfo used on opensource projects

Example 1 with SourceMapInfo

use of org.eclipse.n4js.transpiler.AbstractTranspiler.SourceMapInfo in project n4js by eclipse.

the class EcmaScriptSubGenerator method internalDoGenerate.

@Override
protected void internalDoGenerate(Resource resource, GeneratorOption[] options, IFileSystemAccess fsa) {
    if (!(resource instanceof N4JSResource)) {
        if (IN4JSProject.N4MF_MANIFEST.equals(resource.getURI().lastSegment())) {
            return;
        }
        throw new IllegalArgumentException("Given resource is not an N4JSResource. " + resource);
    }
    final N4JSResource resourceCasted = (N4JSResource) resource;
    if (resourceCasted.getModule().isStaticPolyfillModule()) {
        // do not transpile static polyfill modules (i.e. the fillers)
        return;
    }
    Measurement measurement = this.collector.getMeasurement(resource.getURI().toString());
    /*
		 * In addition to here, check for cancellation is done also on file-emit boundaries, see fsa.generateFile().
		 */
    CancelIndicator monitor = ciExtractor.extractCancelIndicator(fsa);
    // if the transpile-conditions are all met, then transpile:
    if (shouldBeCompiled(resource, monitor)) {
        final String compiledFileExtension = getCompiledFileExtension(resource);
        final String filename = getTargetFileName(resource, compiledFileExtension);
        final String sourceMapFileExtension = getCompiledFileSourceMapExtension(resource);
        final String sourceMapFileName = getTargetFileName(resource, sourceMapFileExtension);
        // used within the file-content to refer to sibling-file:
        final String simpleSourceMapFileName = new File(sourceMapFileName).toPath().getFileName().toString();
        final String simpleCompiledFileName = new File(filename).toPath().getFileName().toString();
        // the next two variables store the navigation-prefix to get to the sources
        final Path relativeNavigationToSrc = calculateNavigationFromOutputToSourcePath(fsa, getCompilerID(), resourceCasted);
        final Path explicitNavigationToSrc = Paths.get("/sources");
        // true use explicitNavigationToSrc | false use relativeNavigationToSrc
        boolean useExplicitSourceRef = true;
        boolean createSourceMap = true;
        if (filename != null) {
            final EObject root = rootElement(resource);
            if (root != null) {
                final Writer buffCode = new StringWriter();
                Optional<SourceMapInfo> optSourceMapData = Optional.absent();
                if (createSourceMap) {
                    SourceMapInfo sourceMapDataInstance = getTranspiler().new SourceMapInfo();
                    sourceMapDataInstance.sourceMapBuff = new StringWriter();
                    sourceMapDataInstance.simpleSourceMapFileName = simpleSourceMapFileName;
                    sourceMapDataInstance.simpleCompiledFileName = simpleCompiledFileName;
                    sourceMapDataInstance.isExplicitSourceRef = useExplicitSourceRef;
                    sourceMapDataInstance.explicitNavigationToSrc = explicitNavigationToSrc;
                    sourceMapDataInstance.n4jsFilePath = relativeNavigationToSrc.resolve(resourceCasted.getURI().lastSegment()).toString();
                    sourceMapDataInstance.sourceMapFileExtension = sourceMapFileExtension;
                    optSourceMapData = Optional.of(sourceMapDataInstance);
                }
                getTranspiler().transpile(resourceCasted, options, buffCode, optSourceMapData);
                fsa.generateFile(filename, COMPILER_ID, buffCode.toString());
                if (createSourceMap) {
                    fsa.generateFile(sourceMapFileName, COMPILER_ID, optSourceMapData.get().sourceMapBuff.toString());
                }
            }
        }
    }
    measurement.end();
}

Example 2 with SourceMapInfo

use of org.eclipse.n4js.transpiler.AbstractTranspiler.SourceMapInfo in project n4js by eclipse.

the class PrettyPrinter method print.

/**
 * Serialize the intermediate model in the given transpiler state to <code>outCode</code> and emit source maps to
 * <code>optSourceMapData</code>.
 *
 * @param optPreamble
 *            an optional preamble that will be prepended to the output code. Use '\n' as line separator. If absent,
 *            no preamble will be prepended.<br>
 *            If present, a single line break will be used to separate the preamble from the main output, but
 *            additional line feed characters may be added at the end of the preamble string if empty lines are
 *            desired between preamble and main output.
 */
public void print(TranspilerState state, Writer outCode, Optional<String> optPreamble, Optional<SourceMapInfo> optSourceMapInfo) throws IOException {
    final boolean emitSourceMaps = optSourceMapInfo.isPresent();
    final SourceMapAwareAppendable out = new SourceMapAwareAppendable(outCode, INDENT, emitSourceMaps);
    if (optPreamble.isPresent()) {
        // #append(CharSequence) will convert '\n' to correct line separator
        out.append(optPreamble.get());
        out.newLine();
    }
    PrettyPrinterSwitch.append(out, state);
    if (emitSourceMaps) {
        final SourceMapInfo sourceMapInfo = optSourceMapInfo.get();
        final SourceMapGenerator generator = new SourceMapGeneratorDummy();
        // append link to source maps to outCode
        out.newLine();
        out.append("//# sourceMappingURL=" + sourceMapInfo.simpleSourceMapFileName);
        out.newLine();
        // get the mappings collected by SourceMapAwareAppendable
        final List<SourceOutputMapping> mappings = new ArrayList<>(out.getSourceMapData());
        // perform some tweaks on the mappings (TEMPORARY)
        removeCatchAllMapping(mappings);
        sortMappings(mappings);
        // Convert the source/output mappings produced by SourceMapAwareAppendable to the API of the
        // Google Closure compiler source map library and add them to our SourceMapGenerator 'generator'
        final PositionProvider positionProvider = PositionProvider.from(state.resource);
        for (SourceOutputMapping m : mappings) {
            final EObject originalASTNode = state.tracer.getOriginalASTNode(m.elementInIM);
            if (// it's ok if this is null
            originalASTNode != null && originalASTNode.eResource() instanceof N4JSResource) {
                final ITextRegion region = locationInFileProvider.getSignificantTextRegion(originalASTNode);
                // get the resource and compute the path.
                final String path = sourceMapInfo.resolve((N4JSResource) originalASTNode.eResource());
                final FilePosition sourceStartPosition = positionProvider.toPosition(region.getOffset());
                generator.addMapping(path, // TODO source maps: support for original symbol name
                null, sourceStartPosition, m.outputStart, m.outputEnd);
            }
        }
        // append actual source maps to the buffer passed in via 'sourceMapInfo'
        generator.appendTo(sourceMapInfo.sourceMapBuff, sourceMapInfo.simpleCompiledFileName);
    }
}