private static TextRange calculateLimitRange(
final PsiFile file, final Document doc, final int line) {
final int offset = doc.getLineStartOffset(line);
if (offset > 0) {
PsiMethod method =
PsiTreeUtil.getParentOfType(file.findElementAt(offset), PsiMethod.class, false);
if (method != null) {
final TextRange elemRange = method.getTextRange();
return new TextRange(
doc.getLineNumber(elemRange.getStartOffset()),
doc.getLineNumber(elemRange.getEndOffset()));
}
}
return new TextRange(0, doc.getLineCount() - 1);
}
public static List<PsiLambdaExpression> collectLambdas(
@NotNull SourcePosition position, final boolean onlyOnTheLine) {
ApplicationManager.getApplication().assertReadAccessAllowed();
PsiFile file = position.getFile();
final int line = position.getLine();
final Document document = PsiDocumentManager.getInstance(file.getProject()).getDocument(file);
if (document == null || line >= document.getLineCount()) {
return Collections.emptyList();
}
PsiElement element = position.getElementAt();
final TextRange lineRange = DocumentUtil.getLineTextRange(document, line);
do {
PsiElement parent = element.getParent();
if (parent == null || (parent.getTextOffset() < lineRange.getStartOffset())) {
break;
}
element = parent;
} while (true);
final List<PsiLambdaExpression> lambdas = new ArrayList<PsiLambdaExpression>(3);
final PsiElementVisitor lambdaCollector =
new JavaRecursiveElementVisitor() {
@Override
public void visitLambdaExpression(PsiLambdaExpression expression) {
super.visitLambdaExpression(expression);
if (!onlyOnTheLine || getFirstElementOnTheLine(expression, document, line) != null) {
lambdas.add(expression);
}
}
};
element.accept(lambdaCollector);
// add initial lambda if we're inside already
PsiElement method = getContainingMethod(element);
if (method instanceof PsiLambdaExpression) {
lambdas.add((PsiLambdaExpression) method);
}
for (PsiElement sibling = getNextElement(element);
sibling != null;
sibling = getNextElement(sibling)) {
if (!intersects(lineRange, sibling)) {
break;
}
sibling.accept(lambdaCollector);
}
return lambdas;
}
@Override
public void visitReferenceExpression(final PsiReferenceExpression reference) {
if (myLineRange.intersects(reference.getTextRange())) {
final PsiElement psiElement = reference.resolve();
if (psiElement instanceof PsiVariable) {
final PsiVariable var = (PsiVariable) psiElement;
if (var instanceof PsiField) {
if (myCollectExpressions
&& !DebuggerUtils.hasSideEffectsOrReferencesMissingVars(
reference, myVisibleLocals)) {
/*
if (var instanceof PsiEnumConstant && reference.getQualifier() == null) {
final PsiClass enumClass = ((PsiEnumConstant)var).getContainingClass();
if (enumClass != null) {
final PsiExpression expression = JavaPsiFacade.getInstance(var.getProject()).getParserFacade().createExpressionFromText(enumClass.getName() + "." + var.getName(), var);
final PsiReference ref = expression.getReference();
if (ref != null) {
ref.bindToElement(var);
myExpressions.add(new TextWithImportsImpl(expression));
}
}
}
else {
myExpressions.add(new TextWithImportsImpl(reference));
}
*/
final PsiModifierList modifierList = var.getModifierList();
boolean isConstant =
(var instanceof PsiEnumConstant)
|| (modifierList != null
&& modifierList.hasModifierProperty(PsiModifier.STATIC)
&& modifierList.hasModifierProperty(PsiModifier.FINAL));
if (!isConstant) {
myExpressions.add(new TextWithImportsImpl(reference));
}
}
} else {
if (myVisibleLocals.contains(var.getName())) {
myVars.add(var.getName());
} else {
// fix for variables used in inner classes
if (!Comparing.equal(
PsiTreeUtil.getParentOfType(reference, PsiClass.class),
PsiTreeUtil.getParentOfType(var, PsiClass.class))) {
myExpressions.add(new TextWithImportsImpl(reference));
}
}
}
}
}
super.visitReferenceExpression(reference);
}
private static boolean shouldSkipLine(final PsiFile file, Document doc, int line) {
final int start = doc.getLineStartOffset(line);
final int end = doc.getLineEndOffset(line);
final int _start = CharArrayUtil.shiftForward(doc.getCharsSequence(), start, " \n\t");
if (_start >= end) {
return true;
}
TextRange alreadyChecked = null;
for (PsiElement elem = file.findElementAt(_start);
elem != null
&& elem.getTextOffset() <= end
&& (alreadyChecked == null || !alreadyChecked.contains(elem.getTextRange()));
elem = elem.getNextSibling()) {
for (PsiElement _elem = elem; _elem.getTextOffset() >= _start; _elem = _elem.getParent()) {
alreadyChecked = _elem.getTextRange();
if (_elem instanceof PsiDeclarationStatement) {
final PsiElement[] declared = ((PsiDeclarationStatement) _elem).getDeclaredElements();
for (PsiElement declaredElement : declared) {
if (declaredElement instanceof PsiVariable) {
return false;
}
}
}
if (_elem instanceof PsiJavaCodeReferenceElement) {
final PsiElement resolved = ((PsiJavaCodeReferenceElement) _elem).resolve();
if (resolved instanceof PsiVariable) {
return false;
}
}
}
}
return true;
}
public static boolean intersects(@NotNull TextRange range, @NotNull PsiElement elem) {
TextRange elemRange = elem.getTextRange();
return elemRange != null && elemRange.intersects(range);
}
private static Pair<Set<String>, Set<TextWithImports>> findReferencedVars(
Set<String> visibleVars, SourcePosition position) {
final int line = position.getLine();
if (line < 0) {
return Pair.create(Collections.<String>emptySet(), Collections.<TextWithImports>emptySet());
}
final PsiFile positionFile = position.getFile();
if (!positionFile.getLanguage().isKindOf(JavaLanguage.INSTANCE)) {
return Pair.create(visibleVars, Collections.<TextWithImports>emptySet());
}
final VirtualFile vFile = positionFile.getVirtualFile();
final Document doc =
vFile != null ? FileDocumentManager.getInstance().getDocument(vFile) : null;
if (doc == null || doc.getLineCount() == 0 || line > (doc.getLineCount() - 1)) {
return Pair.create(Collections.<String>emptySet(), Collections.<TextWithImports>emptySet());
}
final TextRange limit = calculateLimitRange(positionFile, doc, line);
int startLine = Math.max(limit.getStartOffset(), line - 1);
startLine = Math.min(startLine, limit.getEndOffset());
while (startLine > limit.getStartOffset() && shouldSkipLine(positionFile, doc, startLine)) {
startLine--;
}
final int startOffset = doc.getLineStartOffset(startLine);
int endLine = Math.min(line + 2, limit.getEndOffset());
while (endLine < limit.getEndOffset() && shouldSkipLine(positionFile, doc, endLine)) {
endLine++;
}
final int endOffset = doc.getLineEndOffset(endLine);
final TextRange lineRange = new TextRange(startOffset, endOffset);
if (!lineRange.isEmpty()) {
final int offset =
CharArrayUtil.shiftForward(doc.getCharsSequence(), doc.getLineStartOffset(line), " \t");
PsiElement element = positionFile.findElementAt(offset);
if (element != null) {
PsiMethod method = PsiTreeUtil.getNonStrictParentOfType(element, PsiMethod.class);
if (method != null) {
element = method;
} else {
PsiField field = PsiTreeUtil.getNonStrictParentOfType(element, PsiField.class);
if (field != null) {
element = field;
} else {
final PsiClassInitializer initializer =
PsiTreeUtil.getNonStrictParentOfType(element, PsiClassInitializer.class);
if (initializer != null) {
element = initializer;
}
}
}
//noinspection unchecked
if (element instanceof PsiCompiledElement) {
return Pair.create(visibleVars, Collections.<TextWithImports>emptySet());
} else {
VariablesCollector collector =
new VariablesCollector(visibleVars, adjustRange(element, lineRange));
element.accept(collector);
return Pair.create(collector.getVars(), collector.getExpressions());
}
}
}
return Pair.create(Collections.<String>emptySet(), Collections.<TextWithImports>emptySet());
}
private void processVariable(final PsiVariable variable) {
if (myLineRange.intersects(variable.getTextRange())
&& myVisibleLocals.contains(variable.getName())) {
myVars.add(variable.getName());
}
}
@Override
public void visitElement(final PsiElement element) {
if (myLineRange.intersects(element.getTextRange())) {
super.visitElement(element);
}
}