private JsExpression generateRawInterfaceTypeComparison(
JsExpression lhs, DartTypeNode typeNode, SourceInfo src) {
ClassElement element = (ClassElement) typeNode.getType().getElement();
if (element.equals(typeProvider.getObjectType().getElement())) {
// Everything is an object, including null
return this.translationContext.getProgram().getTrueLiteral();
}
String builtin = builtInTypeChecks.get(element);
if (builtin != null) {
return call(src, nameref(src, builtin), lhs);
}
// Due to implementing implied interfaces of classes, we always have to
// use $implements$ rather than using JS instanceof for classes.
// Inject: !!(tmp = target, tmp && tmp.$implements$type)
JsProgram program = translationContext.getProgram();
JsName tmp = context.createTemporary();
String mangledClass = translationContext.getMangler().mangleClassName(element);
return not(
src,
not(
src,
comma(
src,
assign(src, tmp.makeRef(), lhs),
and(
src,
neq(src, tmp.makeRef().setSourceRef(src), program.getNullLiteral()),
nameref(src, tmp, "$implements$" + mangledClass)))));
}
@Nullable
public JsPropertyInitializer translate(
@NotNull JetClassOrObject declaration, TranslationContext context) {
ClassDescriptor descriptor = getClassDescriptor(context().bindingContext(), declaration);
JsExpression value;
if (descriptor.getModality() == Modality.FINAL) {
value =
new ClassTranslator(declaration, classDescriptorToQualifiedLabel, context).translate();
} else {
String label = createNameForClass(descriptor);
JsName name = dummyFunction.getScope().declareName(label);
JsNameRef qualifiedLabel = openClassDescriptorToQualifiedLabel.get(descriptor);
if (qualifiedLabel == null) {
qualifiedLabel = new JsNameRef(name);
openClassDescriptorToQualifiedLabel.put(descriptor, qualifiedLabel);
} else {
qualifiedLabel.resolve(name);
}
qualifiedLabel.setQualifier(declarationsObjectRef);
OpenClassInfo item = new OpenClassInfo((JetClass) declaration, descriptor, name.makeRef());
openList.add(item);
openClassDescriptorToItem.put(descriptor, item);
value = qualifiedLabel;
// not public api classes referenced to internal var _c
if (!descriptor.getVisibility().isPublicAPI()) {
return null;
}
}
return InitializerUtils.createPropertyInitializer(descriptor, value, context());
}
static JsExpression getRTTClassId(
TranslationContext translationContext, ClassElement classElement) {
JsName classJsName = translationContext.getNames().getName(classElement);
JsProgram program = translationContext.getProgram();
JsStringLiteral clsid = program.getStringLiteral(classJsName.getShortIdent());
return call(null, nameref(null, "$cls"), clsid);
}
public ClassDeclarationTranslator(@NotNull TranslationContext context) {
super(context);
dummyFunction = new JsFunction(context.scope());
JsName declarationsObject = context().scope().declareName(Namer.nameForClassesVariable());
classesVar = new JsVars.JsVar(declarationsObject);
declarationsObjectRef = declarationsObject.makeRef();
}
private void generateRTTImplementsMethod(DartClass x) {
ClassElement classElement = x.getSymbol();
// 1) create static type information construction function
// function Foo$lookupOrCreateRTT(rtt, typeArgs) {
//
// // superclass
// FooSuper$addTo(rtt, superTypeArg1, ...);
// // interfaces
// FooInterface1$addTo(rtt, interface1TypeArg1, ...);
//
// // fill in derived types
// rtt.derivedTypes = [
// FirstRef$lookupOrCreateRTT(typearg1, ...),
// ...
// ]
// }
boolean hasTypeParams = classElement.getTypeParameters().size() > 0;
// Build the function
JsFunction implementsFn = new JsFunction(globalScope);
implementsFn.setBody(new JsBlock());
List<JsStatement> body = implementsFn.getBody().getStatements();
JsScope scope = new JsScope(globalScope, "temp");
JsName rtt = scope.declareName("rtt");
implementsFn.getParameters().add(new JsParameter(rtt));
JsName typeArgs = null;
if (hasTypeParams) {
typeArgs = scope.declareName("typeArgs");
implementsFn.getParameters().add(new JsParameter(typeArgs));
}
JsInvocation callAddTo = newInvocation(getRTTAddToMethodName(classElement), rtt.makeRef());
if (hasTypeParams) {
typeArgs = scope.declareName("typeArgs");
callAddTo.getArguments().add(typeArgs.makeRef());
}
body.add(callAddTo.makeStmt());
// Add the derived types
if (hasTypeParams) {
// Populated the list of derived types
JsArrayLiteral derivedTypesArray = new JsArrayLiteral();
// TODO(johnlenz): Add needed types here.
JsExpression addDerivedTypes =
assign(null, nameref(null, rtt.makeRef(), "derivedTypes"), derivedTypesArray);
body.add(addDerivedTypes.makeStmt());
}
// Finally, Add the function
JsExpression fnDecl = assign(null, getRTTImplementsMethodName(classElement), implementsFn);
globalBlock.getStatements().add(fnDecl.makeStmt());
}
private void declareTopLevelObjectInScope(
@NotNull JsScope scope,
@NotNull Map<String, JsName> map,
@NotNull String fullQualifiedName,
@NotNull String name) {
JsName declaredName = scope.declareName(name);
declaredName.setObfuscatable(false);
map.put(fullQualifiedName, declaredName);
scopeMap.put(fullQualifiedName, new JsScope(scope, "scope for " + name));
}
private void declareInner(
@NotNull String fullQualifiedClassName,
@NotNull String shortMethodName,
@NotNull String javascriptName) {
JsScope classScope = scopeMap.get(fullQualifiedClassName);
assert classScope != null;
String fullQualifiedMethodName = fullQualifiedClassName + "." + shortMethodName;
JsName declaredName = classScope.declareName(javascriptName);
declaredName.setObfuscatable(false);
standardObjects.put(fullQualifiedMethodName, declaredName);
}
/** Add the appropriate code to a class's constructing factory, if necessary. */
void maybeAddClassRuntimeTypeToConstructor(
ClassElement classElement, JsFunction factory, JsExpression thisRef) {
// TODO(johnlenz):in optimized mode, only add this where it is needed.
JsScope factoryScope = factory.getScope();
JsExpression typeInfo;
if (hasTypeParameters(classElement)) {
JsName typeinfoParameter = factoryScope.declareName("$rtt");
factory.getParameters().add(0, new JsParameter(typeinfoParameter));
typeInfo = typeinfoParameter.makeRef();
} else {
// TODO(johnlenz): this is a constant value, it only needs to be evaluated once.
typeInfo = generateRawRTTLookup(classElement);
}
JsExpression setTypeInfo =
assign(null, nameref(null, Cloner.clone(thisRef), "$typeInfo"), typeInfo);
factory.getBody().getStatements().add(0, setTypeInfo.makeStmt());
}
@Nullable
private JsNameRef getTargetLabel(@NotNull Node statementWithLabel) {
int type = statementWithLabel.getType();
if (type != TokenStream.BREAK && type != TokenStream.CONTINUE) {
String tokenTypeName = TokenStream.tokenToName(statementWithLabel.getType());
throw new AssertionError("Unexpected node type with label: " + tokenTypeName);
}
Node label = statementWithLabel.getFirstChild();
if (label == null) return null;
String identifier = label.getString();
assert identifier != null : "If label exists identifier should not be null";
JsName labelName = scopeContext.labelFor(identifier);
assert labelName != null : "Unknown label name: " + identifier;
return labelName.makeRef();
}
private void generateRTTLookupMethod(DartClass x) {
ClassElement classElement = x.getSymbol();
boolean hasTypeParams = hasTypeParameters(classElement);
// 1) create static type information construction function
// function Foo$lookupOrCreateRTT(typeargs) {
// return $createRTT(name, Foo$RTTimplements, typeargs) ;
// }
// Build the function
JsFunction lookupFn = new JsFunction(globalScope);
lookupFn.setBody(new JsBlock());
List<JsStatement> body = lookupFn.getBody().getStatements();
JsScope scope = new JsScope(globalScope, "temp");
JsProgram program = translationContext.getProgram();
JsInvocation invokeCreate =
call(null, newQualifiedNameRef("RTT.create"), getRTTClassId(classElement));
List<JsExpression> callArgs = invokeCreate.getArguments();
if (hasRTTImplements(classElement)) {
callArgs.add(getRTTImplementsMethodName(classElement));
} else if (hasTypeParams) {
// need a placeholder param if the typeArgs are needed.
callArgs.add(program.getNullLiteral());
}
if (hasTypeParams) {
JsName typeArgs = scope.declareName("typeArgs");
lookupFn.getParameters().add(new JsParameter(typeArgs));
callArgs.add(typeArgs.makeRef());
}
body.add(new JsReturn(invokeCreate));
// Finally, Add the function
JsExpression fnDecl = assign(null, getRTTLookupMethodName(classElement), lookupFn);
globalBlock.getStatements().add(fnDecl.makeStmt());
}
@NotNull
public JsPropertyInitializer getDeclarationAsInitializer() {
return new JsPropertyInitializer(namespaceName.makeRef(), getNamespaceDeclaration());
}
@NotNull
public JsNameRef nameReference() {
return variableName.makeRef();
}
/*package*/ TemporaryVariable(
@NotNull JsName temporaryName, @NotNull JsExpression initExpression) {
this.variableName = temporaryName;
this.assignmentExpression = AstUtil.newAssignment(variableName.makeRef(), initExpression);
}
private void generateRTTAddToMethod(DartClass x) {
ClassElement classElement = x.getSymbol();
// 2) create "addTo" method
// Foo$Type$addTo(target, typeargs) {
// var rtt = Foo$lookupOrCreateRTT(typeargs)
// target.implementedTypes[rtt.classkey] = rtt;
// }
// Build the function
JsFunction addToFn = new JsFunction(globalScope);
addToFn.setBody(new JsBlock());
JsScope scope = new JsScope(globalScope, "temp");
JsName targetType = scope.declareName("target");
addToFn.getParameters().add(new JsParameter(targetType));
// Get the RTT info object
JsName rtt = scope.declareName("rtt");
List<JsStatement> body = addToFn.getBody().getStatements();
JsInvocation callLookup = newInvocation(getRTTLookupMethodName(classElement));
if (hasTypeParameters(classElement)) {
JsName typeArgs = scope.declareName("typeArgs");
addToFn.getParameters().add(new JsParameter(typeArgs));
callLookup.getArguments().add(new JsNameRef(typeArgs));
}
JsStatement rttLookup = newVar((SourceInfo) null, rtt, callLookup);
body.add(rttLookup);
// store it.
JsExpression addToTypes =
newAssignment(
new JsArrayAccess(
newNameRef(targetType.makeRef(), "implementedTypes"),
newNameRef(rtt.makeRef(), "classKey")),
rtt.makeRef());
body.add(addToTypes.makeStmt());
InterfaceType superType = classElement.getSupertype();
if (superType != null && !superType.getElement().isObject()) {
ClassElement interfaceElement = superType.getElement();
JsInvocation callAddTo =
newInvocation(getRTTAddToMethodName(interfaceElement), targetType.makeRef());
if (hasTypeParameters(interfaceElement) && !superType.hasDynamicTypeArgs()) {
JsArrayLiteral superTypeArgs = new JsArrayLiteral();
List<? extends Type> typeParams = classElement.getTypeParameters();
for (Type arg : superType.getArguments()) {
superTypeArgs
.getExpressions()
.add(
buildTypeLookupExpression(
arg, typeParams, nameref(null, targetType.makeRef(), "typeArgs")));
}
callAddTo.getArguments().add(superTypeArgs);
}
body.add(callAddTo.makeStmt());
}
// Add the interfaces
for (InterfaceType interfaceType : classElement.getInterfaces()) {
ClassElement interfaceElement = interfaceType.getElement();
JsInvocation callAddTo =
call(null, getRTTAddToMethodName(interfaceElement), targetType.makeRef());
if (hasTypeParameters(interfaceElement) && !interfaceType.hasDynamicTypeArgs()) {
JsArrayLiteral interfaceTypeArgs = new JsArrayLiteral();
List<? extends Type> typeParams = classElement.getTypeParameters();
for (Type arg : interfaceType.getArguments()) {
interfaceTypeArgs
.getExpressions()
.add(
buildTypeLookupExpression(
arg, typeParams, nameref(null, targetType.makeRef(), "typeArgs")));
}
callAddTo.getArguments().add(interfaceTypeArgs);
}
body.add(callAddTo.makeStmt());
}
// Add the function statement
JsExpression fnDecl = newAssignment(getRTTAddToMethodName(classElement), addToFn);
globalBlock.getStatements().add(fnDecl.makeStmt());
}