/**
* Parse the source for the specified compilation unit and resolve any elements found in it. Any
* exceptions thrown by the {@link DartParser} will be added to the given collection.
*
* @param compilationUnit the compilation unit (not <code>null</code>)
* @param parseErrors a collection to which parse errors are added or <code>null</code> if parse
* errors should be ignored
* @return the parse result
*/
public static DartUnit resolveUnit(
CompilationUnit compilationUnit, Collection<DartCompilationError> parseErrors)
throws DartModelException {
long start = System.currentTimeMillis();
DartLibraryImpl library = (DartLibraryImpl) compilationUnit.getLibrary();
if (library == null) {
// If we cannot get the library, we cannot resolve any elements so we
// revert to simply parsing the compilation unit.
DartUnit ret = parseUnit(compilationUnit, parseErrors);
long elapsed = System.currentTimeMillis() - start;
Instrumentation.metric("DartCompilerUtils-resolveUnit", elapsed)
.with("ParseOnlyFallback", "true")
.log();
Instrumentation.operation("DartCompilerUtils-resolveUnit", elapsed)
.with("ParseOnlyFallback", "true")
.with("CompilaitonUnit-ElementName", compilationUnit.getElementName())
.log();
return ret;
}
IResource resource = compilationUnit.getResource();
URI unitUri = null;
if (resource != null) {
unitUri = resource.getLocationURI();
}
if (unitUri == null && compilationUnit instanceof ExternalCompilationUnitImpl) {
unitUri = ((ExternalCompilationUnitImpl) compilationUnit).getUri();
}
if (unitUri == null) {
unitUri = ((CompilationUnitImpl) compilationUnit).getSourceRef().getUri();
}
String unitSource = compilationUnit.getSource();
Map<URI, String> suppliedSources = new HashMap<URI, String>();
if (unitSource != null) {
suppliedSources.put(unitUri, unitSource);
}
DartUnit ret =
resolveUnit(library.getLibrarySourceFile(), unitUri, suppliedSources, parseErrors);
long elapsed = System.currentTimeMillis() - start;
Instrumentation.metric("DartCompilerUtils-resolveUnit", elapsed)
.with("ParseOnlyFallback", "false")
.log();
Instrumentation.operation("DartCompilerUtils-resolveUnit", elapsed)
.with("ParseOnlyFallback", "false")
.with("CompilaitonUnit-ElementName", compilationUnit.getElementName())
.with("compilationUnit.LastModified", compilationUnit.getModificationStamp())
.log();
return ret;
}
/**
* Parse the source for the specified compilation unit. Any exceptions thrown by the {@link
* DartParser} will be logged and a {@link DartModelException} thrown.
*
* @param compilationUnit the compilation unit (not <code>null</code>)
* @param parseErrors a collection to which parse errors are appended or <code>null</code> if
* parse errors should be ignored
* @return the parse result
*/
public static DartUnit parseUnit(
CompilationUnit compilationUnit, Collection<DartCompilationError> parseErrors)
throws DartModelException {
String name = compilationUnit.getElementName();
String source = compilationUnit.getSource();
return parseSource(name, source, parseErrors);
}
/**
* Search within the given AST node for an identifier representing a {@link DartElement Dart
* element} in the specified source range. Return the element that was found, or <code>null</code>
* if no element was found.
*
* @param node the AST node within which to search
* @return the element that was found
*/
public DartElement searchWithin(DartNode node) {
try {
node.accept(this);
} catch (DartElementFoundException exception) {
// A node with the right source position was found.
} catch (Exception exception) {
DartCore.logInformation(
"Unable to locate element at offset ("
+ startOffset
+ " - "
+ endOffset
+ ") in "
+ compilationUnit.getElementName(),
exception);
return null;
}
return foundElement;
}
@Override
public Change createChange(IProgressMonitor pm) throws CoreException {
pm.beginTask("", 1 + occurrences.size()); // $NON-NLS-1$
try {
// configure Change
{
change = new CompilationUnitChange(unit.getElementName(), unit);
change.setEdit(new MultiTextEdit());
change.setKeepPreviewEdits(true);
}
// replace occurrences with method invocation
for (Occurrence occurence : occurrences) {
pm.worked(1);
SourceRange range = occurence.range;
// may be replacement of duplicates disabled
if (!replaceAllOccurrences && !occurence.isSelection) {
continue;
}
// prepare invocation source
String invocationSource;
{
StringBuilder sb = new StringBuilder();
// may be returns value
if (returnVariable != null) {
String varTypeName = ExtractUtils.getTypeSource(returnVariable.getType());
String originalName = returnVariable.getName();
String occurrenceName = occurence.parameterOldToOccurrenceName.get(originalName);
if (varTypeName.equals("dynamic")) {
sb.append("var ");
} else {
sb.append(varTypeName);
sb.append(" ");
}
sb.append(occurrenceName);
sb.append(" = ");
}
// invocation itself
sb.append(methodName);
sb.append("(");
boolean firstParameter = true;
for (ParameterInfo parameter : parameters) {
// may be comma
if (firstParameter) {
firstParameter = false;
} else {
sb.append(", ");
}
// argument name
{
String parameterOldName = parameter.getOldName();
String argumentName = occurence.parameterOldToOccurrenceName.get(parameterOldName);
sb.append(argumentName);
}
}
sb.append(")");
invocationSource = sb.toString();
// statements as extracted with their ";", so add new one after invocation
if (selectionStatements != null) {
invocationSource += ";";
}
}
// add replace edit
TextEdit edit = new ReplaceEdit(range.getOffset(), range.getLength(), invocationSource);
change.addEdit(edit);
String msg =
Messages.format(
occurence.isSelection
? RefactoringCoreMessages.ExtractMethodRefactoring_substitute_with_call
: RefactoringCoreMessages.ExtractMethodRefactoring_duplicates_single,
methodName);
change.addTextEditGroup(new TextEditGroup(msg, edit));
}
// add method declaration
{
// prepare environment
String prefix = utils.getNodePrefix(parentMember);
String eol = utils.getEndOfLine();
// prepare annotations
String annotations = "";
{
// may be "static"
if (staticContext) {
annotations = "static ";
}
}
// prepare declaration source
String declarationSource = null;
{
String returnExpressionSource = getMethodBodySource();
// expression
if (selectionExpression != null) {
// add return type
String returnTypeName = ExtractUtils.getTypeSource(selectionExpression);
if (returnTypeName != null && !returnTypeName.equals("dynamic")) {
annotations += returnTypeName + " ";
}
// just return expression
declarationSource =
annotations + getSignature() + " => " + returnExpressionSource + ";";
}
// statements
if (selectionStatements != null) {
if (returnVariable != null) {
String returnTypeName = ExtractUtils.getTypeSource(returnVariable.getType());
if (returnTypeName != null && !returnTypeName.equals("dynamic")) {
annotations += returnTypeName + " ";
}
} else {
annotations += "void ";
}
declarationSource = annotations + getSignature() + " {" + eol;
declarationSource += returnExpressionSource;
if (returnVariable != null) {
declarationSource += prefix + " return " + returnVariable.getName() + ";" + eol;
}
declarationSource += prefix + "}";
}
}
// insert declaration
if (declarationSource != null) {
int offset = parentMember.getSourceInfo().getEnd();
TextEdit edit = new ReplaceEdit(offset, 0, eol + eol + prefix + declarationSource);
change.addEdit(edit);
change.addTextEditGroup(
new TextEditGroup(
Messages.format(
selectionExpression != null
? RefactoringCoreMessages.ExtractMethodRefactoring_add_method_expression
: RefactoringCoreMessages.ExtractMethodRefactoring_add_method,
methodName),
edit));
}
}
pm.worked(1);
// done
return change;
} finally {
pm.done();
}
}