protected void addKeywords(
final Set<LookupElement> set,
final PsiElement position,
final PrefixMatcher matcher,
final PsiFile file,
final CompletionVariant variant,
final Object comp,
final TailType tailType) {
if (comp instanceof String) {
addKeyword(set, tailType, comp, matcher, file, variant);
} else {
final CompletionContext context =
position.getUserData(CompletionContext.COMPLETION_CONTEXT_KEY);
if (comp instanceof ContextGetter) {
final Object[] elements = ((ContextGetter) comp).get(position, context);
for (Object element : elements) {
addLookupItem(set, tailType, element, file, variant);
}
}
// TODO: KeywordChooser -> ContextGetter
else if (comp instanceof KeywordChooser) {
final String[] keywords = ((KeywordChooser) comp).getKeywords(context, position);
for (String keyword : keywords) {
addKeyword(set, tailType, keyword, matcher, file, variant);
}
}
}
}
@Nullable("null means DFA analysis has failed (too complex to analyze)")
public static Collection<PsiExpression> getCachedVariableValues(
@Nullable final PsiVariable variable, @Nullable final PsiElement context) {
if (variable == null || context == null) return Collections.emptyList();
CachedValue<MultiValuesMap<PsiVariable, PsiExpression>> cachedValue =
context.getUserData(DFA_VARIABLE_INFO_KEY);
if (cachedValue == null) {
final PsiElement codeBlock = DfaPsiUtil.getEnclosingCodeBlock(variable, context);
cachedValue =
CachedValuesManager.getManager(context.getProject())
.createCachedValue(
new CachedValueProvider<MultiValuesMap<PsiVariable, PsiExpression>>() {
@Override
public Result<MultiValuesMap<PsiVariable, PsiExpression>> compute() {
final MultiValuesMap<PsiVariable, PsiExpression> result;
if (codeBlock == null) {
result = null;
} else {
final ValuableInstructionVisitor visitor =
new ValuableInstructionVisitor(context);
RunnerResult runnerResult =
new ValuableDataFlowRunner().analyzeMethod(codeBlock, visitor);
if (runnerResult == RunnerResult.OK) {
result = visitor.myValues;
} else {
result = TOO_COMPLEX;
}
}
return new Result<MultiValuesMap<PsiVariable, PsiExpression>>(
result, variable);
}
},
false);
context.putUserData(DFA_VARIABLE_INFO_KEY, cachedValue);
}
final MultiValuesMap<PsiVariable, PsiExpression> value = cachedValue.getValue();
if (value == TOO_COMPLEX) return null;
final Collection<PsiExpression> expressions = value == null ? null : value.get(variable);
return expressions == null ? Collections.<PsiExpression>emptyList() : expressions;
}
public final RunnerResult analyzeMethod(
@NotNull PsiElement psiBlock,
InstructionVisitor visitor,
boolean ignoreAssertions,
@NotNull Collection<DfaMemoryState> initialStates) {
try {
prepareAnalysis(psiBlock, initialStates);
final ControlFlow flow =
createControlFlowAnalyzer().buildControlFlow(psiBlock, ignoreAssertions);
if (flow == null) return RunnerResult.NOT_APPLICABLE;
int endOffset = flow.getInstructionCount();
myInstructions = flow.getInstructions();
myFields = flow.getFields();
myNestedClosures.clear();
if (LOG.isDebugEnabled()) {
LOG.debug("Analyzing code block: " + psiBlock.getText());
for (int i = 0; i < myInstructions.length; i++) {
Instruction instruction = myInstructions[i];
LOG.debug(i + ": " + instruction.toString());
}
}
Integer tooExpensiveHash = psiBlock.getUserData(TOO_EXPENSIVE_HASH);
if (tooExpensiveHash != null && tooExpensiveHash == psiBlock.getText().hashCode()) {
LOG.debug("Too complex because hasn't changed since being too complex already");
return RunnerResult.TOO_COMPLEX;
}
final ArrayList<DfaInstructionState> queue = new ArrayList<DfaInstructionState>();
for (final DfaMemoryState initialState : initialStates) {
queue.add(new DfaInstructionState(myInstructions[0], initialState));
}
long timeLimit = ourTimeLimit;
final boolean unitTestMode = ApplicationManager.getApplication().isUnitTestMode();
WorkingTimeMeasurer measurer = new WorkingTimeMeasurer(timeLimit);
int count = 0;
while (!queue.isEmpty()) {
if (count % 50 == 0 && !unitTestMode && measurer.isTimeOver()) {
LOG.debug("Too complex because the analysis took too long");
psiBlock.putUserData(TOO_EXPENSIVE_HASH, psiBlock.getText().hashCode());
return RunnerResult.TOO_COMPLEX;
}
ProgressManager.checkCanceled();
DfaInstructionState instructionState = queue.remove(0);
if (LOG.isDebugEnabled()) {
LOG.debug(instructionState.toString());
}
// System.out.println(instructionState.toString());
Instruction instruction = instructionState.getInstruction();
long distance = instructionState.getDistanceFromStart();
if (instruction instanceof BranchingInstruction) {
if (!instruction.setMemoryStateProcessed(
instructionState.getMemoryState().createCopy())) {
LOG.debug("Too complex because too many different possible states");
return RunnerResult.TOO_COMPLEX; // Too complex :(
}
}
DfaInstructionState[] after = acceptInstruction(visitor, instructionState);
for (DfaInstructionState state : after) {
Instruction nextInstruction = state.getInstruction();
if ((!(nextInstruction instanceof BranchingInstruction)
|| !nextInstruction.isMemoryStateProcessed(state.getMemoryState()))
&& instruction.getIndex() < endOffset) {
state.setDistanceFromStart(distance + 1);
queue.add(state);
}
}
count++;
}
psiBlock.putUserData(TOO_EXPENSIVE_HASH, null);
LOG.debug("Analysis ok");
return RunnerResult.OK;
} catch (ArrayIndexOutOfBoundsException e) {
LOG.error(psiBlock.getText(), e); // TODO fix in better times
return RunnerResult.ABORTED;
} catch (EmptyStackException e) {
if (LOG.isDebugEnabled()) {
LOG.error(e); // TODO fix in better times
}
return RunnerResult.ABORTED;
}
}
@Override
public void writeExternal(Element element) throws WriteExternalException {
PsiDocumentManager.getInstance(myProject).commitAllDocuments();
if (myPsiElements.isEmpty() && myRangeMarkers.isEmpty() && mySerializedElements.isEmpty()) {
throw new WriteExternalException();
}
if (mySerializedElements.isEmpty()) {
for (SmartPsiElementPointer<PsiElement> ptr : myPsiElements) {
PsiElement psiElement = ptr.getElement();
if (psiElement == null || !psiElement.isValid()) {
continue;
}
FoldingInfo fi = psiElement.getUserData(FOLDING_INFO_KEY);
boolean state = fi != null && fi.expanded;
String signature = FoldingPolicy.getSignature(psiElement);
if (signature == null) {
continue;
}
PsiFile containingFile = psiElement.getContainingFile();
PsiElement restoredElement = FoldingPolicy.restoreBySignature(containingFile, signature);
if (!psiElement.equals(restoredElement)) {
StringBuilder trace = new StringBuilder();
PsiElement restoredAgain =
FoldingPolicy.restoreBySignature(containingFile, signature, trace);
LOG.error(
"element: "
+ psiElement
+ "("
+ psiElement.getText()
+ "); restoredElement: "
+ restoredElement
+ "; signature: '"
+ signature
+ "'; file: "
+ containingFile
+ "; injected: "
+ InjectedLanguageManager.getInstance(myProject)
.isInjectedFragment(containingFile)
+ "; languages: "
+ containingFile.getViewProvider().getLanguages()
+ "; restored again: "
+ restoredAgain
+ "; restore produces same results: "
+ (restoredAgain == restoredElement)
+ "; trace:\n"
+ trace);
}
Element e = new Element(ELEMENT_TAG);
e.setAttribute(SIGNATURE_ATT, signature);
e.setAttribute(EXPANDED_ATT, Boolean.toString(state));
element.addContent(e);
}
} else {
// get back postponed state (before folding initialization)
for (SerializedPsiElement entry : mySerializedElements) {
Element e = new Element(ELEMENT_TAG);
e.setAttribute(SIGNATURE_ATT, entry.mySerializedElement);
e.setAttribute(EXPANDED_ATT, Boolean.toString(entry.myFoldingInfo.getExpanded()));
element.addContent(e);
}
}
String date = null;
for (RangeMarker marker : myRangeMarkers) {
FoldingInfo fi = marker.getUserData(FOLDING_INFO_KEY);
boolean state = fi != null && fi.expanded;
Element e = new Element(MARKER_TAG);
if (date == null) {
date = getTimeStamp();
}
if (date.isEmpty()) {
continue;
}
e.setAttribute(DATE_ATT, date);
e.setAttribute(EXPANDED_ATT, Boolean.toString(state));
String signature =
Integer.valueOf(marker.getStartOffset()) + ":" + Integer.valueOf(marker.getEndOffset());
e.setAttribute(SIGNATURE_ATT, signature);
String placeHolderText = fi == null ? DEFAULT_PLACEHOLDER : fi.placeHolder;
e.setAttribute(PLACEHOLDER_ATT, placeHolderText);
element.addContent(e);
}
}
@Override
public void setToEditor(@NotNull final Editor editor) {
assertDispatchThread();
final PsiManager psiManager = PsiManager.getInstance(myProject);
if (psiManager.isDisposed()) return;
if (!myFile.isValid()) return;
final PsiFile psiFile = psiManager.findFile(myFile);
if (psiFile == null) return;
if (!mySerializedElements.isEmpty()) {
// Restore postponed state
assert myPsiElements.isEmpty() : "Sequential deserialization";
for (SerializedPsiElement entry : mySerializedElements) {
PsiElement restoredElement =
FoldingPolicy.restoreBySignature(psiFile, entry.mySerializedElement);
if (restoredElement != null && restoredElement.isValid()) {
myPsiElements.add(
SmartPointerManager.getInstance(myProject)
.createSmartPsiElementPointer(restoredElement));
restoredElement.putUserData(FOLDING_INFO_KEY, entry.myFoldingInfo);
}
}
mySerializedElements.clear();
}
Map<PsiElement, FoldingDescriptor> ranges = null;
for (SmartPsiElementPointer<PsiElement> ptr : myPsiElements) {
PsiElement element = ptr.getElement();
if (element == null || !element.isValid()) {
continue;
}
if (ranges == null) {
ranges = buildRanges(editor, psiFile);
}
FoldingDescriptor descriptor = ranges.get(element);
if (descriptor == null) {
continue;
}
TextRange range = descriptor.getRange();
FoldRegion region =
FoldingUtil.findFoldRegion(editor, range.getStartOffset(), range.getEndOffset());
if (region != null) {
FoldingInfo fi = element.getUserData(FOLDING_INFO_KEY);
boolean state = fi != null && fi.expanded;
region.setExpanded(state);
}
}
for (RangeMarker marker : myRangeMarkers) {
if (!marker.isValid()) {
continue;
}
FoldRegion region =
FoldingUtil.findFoldRegion(editor, marker.getStartOffset(), marker.getEndOffset());
FoldingInfo info = marker.getUserData(FOLDING_INFO_KEY);
if (region == null) {
if (info != null) {
region =
editor
.getFoldingModel()
.addFoldRegion(marker.getStartOffset(), marker.getEndOffset(), info.placeHolder);
}
if (region == null) {
return;
}
}
boolean state = info != null && info.expanded;
region.setExpanded(state);
}
}
@NotNull
final RunnerResult analyzeMethod(
@NotNull PsiElement psiBlock,
@NotNull InstructionVisitor visitor,
boolean ignoreAssertions,
@NotNull Collection<DfaMemoryState> initialStates) {
if (PsiTreeUtil.findChildOfType(psiBlock, OuterLanguageElement.class) != null)
return RunnerResult.NOT_APPLICABLE;
try {
final ControlFlow flow =
new ControlFlowAnalyzer(myValueFactory, psiBlock, ignoreAssertions).buildControlFlow();
if (flow == null) return RunnerResult.NOT_APPLICABLE;
int[] loopNumber = LoopAnalyzer.calcInLoop(flow);
int endOffset = flow.getInstructionCount();
myInstructions = flow.getInstructions();
myNestedClosures.clear();
Set<Instruction> joinInstructions = ContainerUtil.newHashSet();
for (int index = 0; index < myInstructions.length; index++) {
Instruction instruction = myInstructions[index];
if (instruction instanceof GotoInstruction) {
joinInstructions.add(myInstructions[((GotoInstruction) instruction).getOffset()]);
} else if (instruction instanceof ConditionalGotoInstruction) {
joinInstructions.add(
myInstructions[((ConditionalGotoInstruction) instruction).getOffset()]);
} else if (instruction instanceof MethodCallInstruction
&& !((MethodCallInstruction) instruction).getContracts().isEmpty()) {
joinInstructions.add(myInstructions[index + 1]);
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("Analyzing code block: " + psiBlock.getText());
for (int i = 0; i < myInstructions.length; i++) {
LOG.debug(i + ": " + myInstructions[i]);
}
}
// for (int i = 0; i < myInstructions.length; i++) System.out.println(i + ": " +
// myInstructions[i].toString());
Integer tooExpensiveHash = psiBlock.getUserData(TOO_EXPENSIVE_HASH);
if (tooExpensiveHash != null && tooExpensiveHash == psiBlock.getText().hashCode()) {
LOG.debug("Too complex because hasn't changed since being too complex already");
return RunnerResult.TOO_COMPLEX;
}
final StateQueue queue = new StateQueue();
for (final DfaMemoryState initialState : initialStates) {
queue.offer(new DfaInstructionState(myInstructions[0], initialState));
}
MultiMap<BranchingInstruction, DfaMemoryState> processedStates = MultiMap.createSet();
MultiMap<BranchingInstruction, DfaMemoryState> incomingStates = MultiMap.createSet();
long msLimit =
shouldCheckTimeLimit()
? Registry.intValue("ide.dfa.time.limit.online")
: Registry.intValue("ide.dfa.time.limit.offline");
WorkingTimeMeasurer measurer = new WorkingTimeMeasurer(msLimit * 1000 * 1000);
int count = 0;
while (!queue.isEmpty()) {
List<DfaInstructionState> states = queue.getNextInstructionStates(joinInstructions);
for (DfaInstructionState instructionState : states) {
if (count++ % 1024 == 0 && measurer.isTimeOver()) {
LOG.debug("Too complex because the analysis took too long");
psiBlock.putUserData(TOO_EXPENSIVE_HASH, psiBlock.getText().hashCode());
return RunnerResult.TOO_COMPLEX;
}
ProgressManager.checkCanceled();
if (LOG.isDebugEnabled()) {
LOG.debug(instructionState.toString());
}
// System.out.println(instructionState.toString());
Instruction instruction = instructionState.getInstruction();
if (instruction instanceof BranchingInstruction) {
BranchingInstruction branching = (BranchingInstruction) instruction;
Collection<DfaMemoryState> processed = processedStates.get(branching);
if (processed.contains(instructionState.getMemoryState())) {
continue;
}
if (processed.size() > MAX_STATES_PER_BRANCH) {
LOG.debug("Too complex because too many different possible states");
return RunnerResult.TOO_COMPLEX; // Too complex :(
}
if (loopNumber[branching.getIndex()] != 0) {
processedStates.putValue(branching, instructionState.getMemoryState().createCopy());
}
}
DfaInstructionState[] after = acceptInstruction(visitor, instructionState);
for (DfaInstructionState state : after) {
Instruction nextInstruction = state.getInstruction();
if (nextInstruction.getIndex() >= endOffset) {
continue;
}
handleStepOutOfLoop(
instruction,
nextInstruction,
loopNumber,
processedStates,
incomingStates,
states,
after,
queue);
if (nextInstruction instanceof BranchingInstruction) {
BranchingInstruction branching = (BranchingInstruction) nextInstruction;
if (processedStates.get(branching).contains(state.getMemoryState())
|| incomingStates.get(branching).contains(state.getMemoryState())) {
continue;
}
if (loopNumber[branching.getIndex()] != 0) {
incomingStates.putValue(branching, state.getMemoryState().createCopy());
}
}
queue.offer(state);
}
}
}
psiBlock.putUserData(TOO_EXPENSIVE_HASH, null);
LOG.debug("Analysis ok");
return RunnerResult.OK;
} catch (ArrayIndexOutOfBoundsException e) {
LOG.error(psiBlock.getText(), e);
return RunnerResult.ABORTED;
} catch (EmptyStackException e) {
LOG.error(psiBlock.getText(), e);
return RunnerResult.ABORTED;
}
}