@Override
public Void visitXmlTagNode(XmlTagNode node) {
if (isScriptNode(node)) {
Source htmlSource = htmlElement.getSource();
String scriptSourcePath = getScriptSourcePath(node);
if (node.getAttributeEnd().getType() == TokenType.GT && scriptSourcePath == null) {
EmbeddedHtmlScriptElementImpl script = new EmbeddedHtmlScriptElementImpl(node);
String contents = node.getContent();
// TODO (danrubel): Move scanning embedded scripts into AnalysisContextImpl
// so that clients such as builder can scan, parse, and get errors without resolving
AnalysisErrorListener errorListener =
new AnalysisErrorListener() {
@Override
public void onError(AnalysisError error) {
// TODO (danrubel): make errors accessible once this is moved into
// AnalysisContextImpl
}
};
StringScanner scanner = new StringScanner(null, contents, errorListener);
com.google.dart.engine.scanner.Token firstToken = scanner.tokenize();
int[] lineStarts = scanner.getLineStarts();
// TODO (danrubel): Move parsing embedded scripts into AnalysisContextImpl
// so that clients such as builder can scan, parse, and get errors without resolving
Parser parser = new Parser(null, errorListener);
CompilationUnit unit = parser.parseCompilationUnit(firstToken);
try {
CompilationUnitBuilder builder = new CompilationUnitBuilder();
CompilationUnitElementImpl elem = builder.buildCompilationUnit(htmlSource, unit);
LibraryElementImpl library = new LibraryElementImpl(context, null);
library.setDefiningCompilationUnit(elem);
script.setScriptLibrary(library);
} catch (AnalysisException e) {
// TODO (danrubel): Handle or forward the exception
e.printStackTrace();
}
scripts.add(script);
} else {
ExternalHtmlScriptElementImpl script = new ExternalHtmlScriptElementImpl(node);
if (scriptSourcePath != null) {
script.setScriptSource(
context.getSourceFactory().resolveUri(htmlSource, scriptSourcePath));
}
scripts.add(script);
}
} else {
node.visitChildren(this);
}
return null;
}
/**
* Determine if the specified node is a Dart script.
*
* @param node the node to be tested (not {@code null})
* @return {@code true} if the node is a Dart script
*/
private boolean isScriptNode(XmlTagNode node) {
if (node.getTagNodes().size() != 0 || !node.getTag().getLexeme().equals(SCRIPT)) {
return false;
}
for (XmlAttributeNode attribute : node.getAttributes()) {
if (attribute.getName().getLexeme().equals(TYPE)) {
Token valueToken = attribute.getValue();
if (valueToken != null) {
String value = valueToken.getLexeme();
if (value.equals(APPLICATION_DART_IN_DOUBLE_QUOTES)
|| value.equals(APPLICATION_DART_IN_SINGLE_QUOTES)) {
return true;
}
}
}
}
return false;
}
/**
* Return the value of the source attribute if it exists.
*
* @param node the node containing attributes
* @return the source path or {@code null} if not defined
*/
private String getScriptSourcePath(XmlTagNode node) {
for (XmlAttributeNode attribute : node.getAttributes()) {
if (attribute.getName().getLexeme().equals(SRC)) {
String text = attribute.getText();
return text != null && text.length() > 0 ? text : null;
}
}
return null;
}
